Move all files to 2017/

2025-09-29 22:25:17 +01:00 · 2025-09-29 22:25:17 +01:00 · 2875863330
commit 2875863330
parent ac7370f67f
15717 changed files with 0 additions and 0 deletions
--- a/2017/web/core/modules/system/config/install/core.date_format.fallback.yml
+++ b/2017/web/core/modules/system/config/install/core.date_format.fallback.yml
@ -0,0 +1,7 @@
+langcode: en
+status: true
+dependencies: {  }
+id: fallback
+label: 'Fallback date format'
+locked: true
+pattern: 'D, m/d/Y - H:i'
--- a/2017/web/core/modules/system/config/install/core.date_format.html_date.yml
+++ b/2017/web/core/modules/system/config/install/core.date_format.html_date.yml
@ -0,0 +1,7 @@
+langcode: en
+status: true
+dependencies: {  }
+id: html_date
+label: 'HTML Date'
+locked: true
+pattern: Y-m-d
--- a/2017/web/core/modules/system/config/install/core.date_format.html_datetime.yml
+++ b/2017/web/core/modules/system/config/install/core.date_format.html_datetime.yml
@ -0,0 +1,7 @@
+langcode: en
+status: true
+dependencies: {  }
+id: html_datetime
+label: 'HTML Datetime'
+locked: true
+pattern: 'Y-m-d\TH:i:sO'
--- a/2017/web/core/modules/system/config/install/core.date_format.html_month.yml
+++ b/2017/web/core/modules/system/config/install/core.date_format.html_month.yml
@ -0,0 +1,7 @@
+langcode: en
+status: true
+dependencies: {  }
+id: html_month
+label: 'HTML Month'
+locked: true
+pattern: Y-m
--- a/2017/web/core/modules/system/config/install/core.date_format.html_time.yml
+++ b/2017/web/core/modules/system/config/install/core.date_format.html_time.yml
@ -0,0 +1,7 @@
+langcode: en
+status: true
+dependencies: {  }
+id: html_time
+label: 'HTML Time'
+locked: true
+pattern: 'H:i:s'
--- a/2017/web/core/modules/system/config/install/core.date_format.html_week.yml
+++ b/2017/web/core/modules/system/config/install/core.date_format.html_week.yml
@ -0,0 +1,7 @@
+langcode: en
+status: true
+dependencies: {  }
+id: html_week
+label: 'HTML Week'
+locked: true
+pattern: Y-\WW
--- a/2017/web/core/modules/system/config/install/core.date_format.html_year.yml
+++ b/2017/web/core/modules/system/config/install/core.date_format.html_year.yml
@ -0,0 +1,7 @@
+langcode: en
+status: true
+dependencies: {  }
+id: html_year
+label: 'HTML Year'
+locked: true
+pattern: 'Y'
--- a/2017/web/core/modules/system/config/install/core.date_format.html_yearless_date.yml
+++ b/2017/web/core/modules/system/config/install/core.date_format.html_yearless_date.yml
@ -0,0 +1,7 @@
+langcode: en
+status: true
+dependencies: {  }
+id: html_yearless_date
+label: 'HTML Yearless date'
+locked: true
+pattern: m-d
--- a/2017/web/core/modules/system/config/install/core.date_format.long.yml
+++ b/2017/web/core/modules/system/config/install/core.date_format.long.yml
@ -0,0 +1,7 @@
+langcode: en
+status: true
+dependencies: {  }
+id: long
+label: 'Default long date'
+locked: false
+pattern: 'l, F j, Y - H:i'
--- a/2017/web/core/modules/system/config/install/core.date_format.medium.yml
+++ b/2017/web/core/modules/system/config/install/core.date_format.medium.yml
@ -0,0 +1,7 @@
+langcode: en
+status: true
+dependencies: {  }
+id: medium
+label: 'Default medium date'
+locked: false
+pattern: 'D, m/d/Y - H:i'
--- a/2017/web/core/modules/system/config/install/core.date_format.short.yml
+++ b/2017/web/core/modules/system/config/install/core.date_format.short.yml
@ -0,0 +1,7 @@
+langcode: en
+status: true
+dependencies: {  }
+id: short
+label: 'Default short date'
+locked: false
+pattern: 'm/d/Y - H:i'
--- a/2017/web/core/modules/system/config/install/system.authorize.yml
+++ b/2017/web/core/modules/system/config/install/system.authorize.yml
@ -0,0 +1 @@
+filetransfer_default:
--- a/2017/web/core/modules/system/config/install/system.cron.yml
+++ b/2017/web/core/modules/system/config/install/system.cron.yml
@ -0,0 +1,4 @@
+threshold:
+  requirements_warning: 172800
+  requirements_error: 1209600
+logging: 1
--- a/2017/web/core/modules/system/config/install/system.date.yml
+++ b/2017/web/core/modules/system/config/install/system.date.yml
@ -0,0 +1,9 @@
+country:
+  default: ''
+first_day: 0
+timezone:
+  default: ''
+  user:
+    configurable: true
+    warn: false
+    default: 0
--- a/2017/web/core/modules/system/config/install/system.diff.yml
+++ b/2017/web/core/modules/system/config/install/system.diff.yml
@ -0,0 +1,3 @@
+context:
+  lines_leading: 2
+  lines_trailing: 2
--- a/2017/web/core/modules/system/config/install/system.file.yml
+++ b/2017/web/core/modules/system/config/install/system.file.yml
@ -0,0 +1,5 @@
+allow_insecure_uploads: false
+default_scheme: 'public'
+path:
+  temporary: ''
+temporary_maximum_age: 21600
--- a/2017/web/core/modules/system/config/install/system.image.gd.yml
+++ b/2017/web/core/modules/system/config/install/system.image.gd.yml
@ -0,0 +1 @@
+jpeg_quality: 75
--- a/2017/web/core/modules/system/config/install/system.image.yml
+++ b/2017/web/core/modules/system/config/install/system.image.yml
@ -0,0 +1 @@
+toolkit: gd
--- a/2017/web/core/modules/system/config/install/system.logging.yml
+++ b/2017/web/core/modules/system/config/install/system.logging.yml
@ -0,0 +1 @@
+error_level: hide
--- a/2017/web/core/modules/system/config/install/system.mail.yml
+++ b/2017/web/core/modules/system/config/install/system.mail.yml
@ -0,0 +1,2 @@
+interface:
+ default: 'php_mail'
--- a/2017/web/core/modules/system/config/install/system.maintenance.yml
+++ b/2017/web/core/modules/system/config/install/system.maintenance.yml
@ -0,0 +1,2 @@
+message: '@site is currently under maintenance. We should be back shortly. Thank you for your patience.'
+langcode: en
--- a/2017/web/core/modules/system/config/install/system.menu.account.yml
+++ b/2017/web/core/modules/system/config/install/system.menu.account.yml
@ -0,0 +1,7 @@
+langcode: en
+status: true
+dependencies: {  }
+id: account
+label: 'User account menu'
+description: 'Links related to the active user account'
+locked: true
--- a/2017/web/core/modules/system/config/install/system.menu.admin.yml
+++ b/2017/web/core/modules/system/config/install/system.menu.admin.yml
@ -0,0 +1,7 @@
+langcode: en
+status: true
+dependencies: {  }
+id: admin
+label: Administration
+description: 'Administrative task links'
+locked: true
--- a/2017/web/core/modules/system/config/install/system.menu.footer.yml
+++ b/2017/web/core/modules/system/config/install/system.menu.footer.yml
@ -0,0 +1,7 @@
+langcode: en
+status: true
+dependencies: {  }
+id: footer
+label: Footer
+description: 'Site information links'
+locked: true
--- a/2017/web/core/modules/system/config/install/system.menu.main.yml
+++ b/2017/web/core/modules/system/config/install/system.menu.main.yml
@ -0,0 +1,7 @@
+langcode: en
+status: true
+dependencies: {  }
+id: main
+label: 'Main navigation'
+description: 'Site section links'
+locked: true
--- a/2017/web/core/modules/system/config/install/system.menu.tools.yml
+++ b/2017/web/core/modules/system/config/install/system.menu.tools.yml
@ -0,0 +1,7 @@
+langcode: en
+status: true
+dependencies: {  }
+id: tools
+label: Tools
+description: 'User tool links, often added by modules'
+locked: true
--- a/2017/web/core/modules/system/config/install/system.performance.yml
+++ b/2017/web/core/modules/system/config/install/system.performance.yml
@ -0,0 +1,15 @@
+cache:
+  page:
+    max_age: 0
+css:
+  preprocess: true
+  gzip: true
+fast_404:
+  enabled: true
+  paths: '/\.(?:txt|png|gif|jpe?g|css|js|ico|swf|flv|cgi|bat|pl|dll|exe|asp)$/i'
+  exclude_paths: '/\/(?:styles|imagecache)\//'
+  html: '<!DOCTYPE html><html><head><title>404 Not Found</title></head><body><h1>Not Found</h1><p>The requested URL "@path" was not found on this server.</p></body></html>'
+js:
+  preprocess: true
+  gzip: true
+stale_file_threshold: 2592000
--- a/2017/web/core/modules/system/config/install/system.rss.yml
+++ b/2017/web/core/modules/system/config/install/system.rss.yml
@ -0,0 +1,6 @@
+channel:
+  description: ''
+items:
+  limit: 10
+  view_mode: rss
+langcode: en
--- a/2017/web/core/modules/system/config/install/system.site.yml
+++ b/2017/web/core/modules/system/config/install/system.site.yml
@ -0,0 +1,12 @@
+uuid: ''
+name: ''
+mail: ''
+slogan: ''
+page:
+  403: ''
+  404: ''
+  front: /user/login
+admin_compact_mode: false
+weight_select_max: 100
+langcode: en
+default_langcode: en
--- a/2017/web/core/modules/system/config/install/system.theme.global.yml
+++ b/2017/web/core/modules/system/config/install/system.theme.global.yml
@ -0,0 +1,14 @@
+favicon:
+  mimetype: image/vnd.microsoft.icon
+  path: ''
+  url: ''
+  use_default: true
+features:
+  comment_user_picture: true
+  comment_user_verification: true
+  favicon: true
+  node_user_picture: true
+logo:
+  path: ''
+  url: ''
+  use_default: true
--- a/2017/web/core/modules/system/config/install/system.theme.yml
+++ b/2017/web/core/modules/system/config/install/system.theme.yml
@ -0,0 +1,2 @@
+admin: ''
+default: stark
--- a/2017/web/core/modules/system/config/schema/system.schema.yml
+++ b/2017/web/core/modules/system/config/schema/system.schema.yml
@ -0,0 +1,356 @@
+# Schema for the configuration files of the System module.
+
+system.site:
+  type: config_object
+  label: 'Site information'
+  mapping:
+    uuid:
+      type: uuid
+      label: 'Site UUID'
+      constraints:
+        Uuid: []
+        NotNull: []
+    name:
+      type: label
+      label: 'Site name'
+    mail:
+      type: email
+      label: 'Email address'
+    slogan:
+      type: label
+      label: 'Slogan'
+    page:
+      type: mapping
+      label: 'Pages'
+      mapping:
+        403:
+          type: path
+          label: 'Default 403 (access denied) page'
+        404:
+          type: path
+          label: 'Default 404 (not found) page'
+        front:
+          type: path
+          label: 'Default front page'
+    admin_compact_mode:
+      type: boolean
+      label: 'Compact mode'
+    weight_select_max:
+      type: integer
+      label: 'Weight element maximum value'
+    default_langcode:
+      type: string
+      label: 'Site default language code'
+    mail_notification:
+      type: string
+      label: 'Notification email address'
+
+system.maintenance:
+  type: config_object
+  label: 'Maintenance mode'
+  mapping:
+    message:
+      type: text
+      label: 'Message to display when in maintenance mode'
+
+system.authorize:
+  type: config_object
+  label: 'Authorize settings'
+  mapping:
+    filetransfer_default:
+      type: string
+      label: 'Default file transfer protocol'
+
+system.cron:
+  type: config_object
+  label: 'Cron settings'
+  mapping:
+    threshold:
+      type: mapping
+      label: 'Thresholds'
+      mapping:
+        requirements_warning:
+          type: integer
+          label: 'Requirements warning period'
+        requirements_error:
+          type: integer
+          label: 'Requirements error period'
+    logging:
+      type: integer
+      label: 'Detailed cron logging'
+
+system.date:
+  type: config_object
+  label: 'Date settings'
+  mapping:
+    first_day:
+      type: integer
+      label: 'First day of week'
+    country:
+      type: mapping
+      label: 'Country'
+      mapping:
+        default:
+          type: string
+          label: 'Default country'
+    timezone:
+      type: mapping
+      label: 'Time zone settings'
+      mapping:
+        default:
+          type: string
+          label: 'Default time zone'
+        user:
+          type: mapping
+          label: 'User'
+          mapping:
+            configurable:
+              type: boolean
+              label: 'Users may set their own time zone'
+            default:
+              type: integer
+              label: 'Time zone for new users'
+            warn:
+              type: boolean
+              label: 'Remind users at login if their time zone is not set'
+
+system.diff:
+  type: config_object
+  label: 'Diff settings'
+  mapping:
+    context:
+      type: mapping
+      label: 'Context'
+      mapping:
+        lines_leading:
+          type: integer
+          label: 'Number of leading lines in a diff'
+        lines_trailing:
+          type: integer
+          label: 'Number of trailing lines in a diff'
+
+system.logging:
+  type: config_object
+  label: 'Logging settings'
+  mapping:
+    error_level:
+      type: string
+      label: 'Error messages to display'
+
+system.performance:
+  type: config_object
+  label: 'Performance settings'
+  mapping:
+    cache:
+      type: mapping
+      label: 'Caching'
+      mapping:
+        page:
+          type: mapping
+          label: 'Page caching'
+          mapping:
+            max_age:
+              type: integer
+              label: 'Max age'
+    css:
+      type: mapping
+      label: 'CSS performance settings'
+      mapping:
+        preprocess:
+          type: boolean
+          label: 'Aggregate CSS files'
+        gzip:
+          type: boolean
+          label: 'Compress CSS files'
+    fast_404:
+      type: mapping
+      label: 'Fast 404 settings'
+      mapping:
+        enabled:
+          type: boolean
+          label: 'Fast 404 enabled'
+        paths:
+          type: string
+          label: 'Regular expression to match'
+        exclude_paths:
+          type: string
+          label: 'Regular expression to not match'
+        html:
+          type: string
+          label: 'Fast 404 page html'
+    js:
+      type: mapping
+      label: 'JavaScript performance settings'
+      mapping:
+        preprocess:
+          type: boolean
+          label: 'JavaScript preprocess'
+        gzip:
+          type: boolean
+          label: 'Compress JavaScript files.'
+    stale_file_threshold:
+      type: integer
+      label: 'Stale file threshold'
+
+system.rss:
+  type: config_object
+  label: 'Feed settings'
+  mapping:
+    channel:
+      type: mapping
+      label: 'Feed channel'
+      mapping:
+        description:
+          type: text
+          label: 'Feed description'
+    items:
+      type: mapping
+      label: 'Feed items'
+      mapping:
+        limit:
+          type: integer
+          label: 'Feed item limit'
+        view_mode:
+          type: string
+          label: 'Feed content'
+
+system.theme:
+  type: config_object
+  label: 'Theme settings'
+  mapping:
+    admin:
+      type: string
+      label: 'Administration theme'
+    default:
+      type: string
+      label: 'Default theme'
+
+system.menu.*:
+  type: config_entity
+  label: 'Menu'
+  mapping:
+    id:
+      type: string
+      label: 'ID'
+    label:
+      type: label
+      label: 'Label'
+    description:
+      type: label
+      label: 'Menu description'
+    locked:
+      type: boolean
+      label: ''
+
+system.action.*:
+  type: config_entity
+  label: 'System action'
+  mapping:
+    id:
+      type: string
+      label: 'ID'
+    label:
+      type: label
+      label: 'Label'
+    type:
+      type: string
+      label: 'Type'
+    plugin:
+      type: string
+      label: 'Plugin'
+    configuration:
+      type: action.configuration.[%parent.plugin]
+
+system.file:
+  type: config_object
+  label: 'File system'
+  mapping:
+    allow_insecure_uploads:
+      type: boolean
+      label: 'Allow insecure uploads'
+    default_scheme:
+      type: string
+      label: 'Default download method'
+    path:
+      type: mapping
+      label: 'Path settings'
+      mapping:
+        temporary:
+          type: string
+          label: 'Temporary directory'
+    temporary_maximum_age:
+      type: integer
+      label: 'Maximum age for temporary files'
+
+system.image:
+  type: config_object
+  label: 'Image settings'
+  mapping:
+    toolkit:
+      type: string
+      label: 'Toolkit'
+
+system.image.gd:
+  type: config_object
+  label: 'Image settings'
+  mapping:
+    jpeg_quality:
+      type: integer
+      label: 'JPEG quality'
+
+system.mail:
+  type: config_object
+  label: 'Mail system'
+  mapping:
+    interface:
+      type: sequence
+      label: 'Interfaces'
+      sequence:
+        type: string
+        label: 'Interface'
+
+system.theme.global:
+  type: theme_settings
+  label: 'Theme global settings'
+
+block.settings.system_branding_block:
+  type: block_settings
+  label: 'Branding block'
+  mapping:
+    use_site_logo:
+      type: boolean
+      label: 'Use site logo'
+    use_site_name:
+      type: boolean
+      label: 'Use site name'
+    use_site_slogan:
+      type: boolean
+      label: 'Use site slogan'
+
+block.settings.system_menu_block:*:
+  type: block_settings
+  label: 'Menu block'
+  mapping:
+    level:
+      type: integer
+      label: 'Starting level'
+    depth:
+      type: integer
+      label: 'Maximum number of levels'
+
+block.settings.local_tasks_block:
+  type: block_settings
+  label: 'Tabs block'
+  mapping:
+    primary:
+      type: boolean
+      label: 'Whether primary tabs are shown'
+    secondary:
+      type: boolean
+      label: 'Whether secondary tabs are shown'
+
+condition.plugin.request_path:
+  type: condition.plugin
+  mapping:
+    pages:
+      type: string
--- a/2017/web/core/modules/system/css/components/ajax-progress.module.css
+++ b/2017/web/core/modules/system/css/components/ajax-progress.module.css
@ -0,0 +1,49 @@
+/**
+ * @file
+ * Throbber.
+ */
+
+.ajax-progress {
+  display: inline-block;
+  padding: 1px 5px 2px 5px;
+}
+[dir="rtl"] .ajax-progress {
+  float: right;
+}
+.ajax-progress-throbber .throbber {
+  background: transparent url(../../../../misc/throbber-active.gif) no-repeat 0 center;
+  display: inline;
+  padding: 1px 5px 2px;
+}
+.ajax-progress-throbber .message {
+  display: inline;
+  padding: 1px 5px 2px;
+}
+tr .ajax-progress-throbber .throbber {
+  margin: 0 2px;
+}
+.ajax-progress-bar {
+  width: 16em;
+}
+
+/* Full screen throbber */
+.ajax-progress-fullscreen {
+  /* Can't do center:50% middle: 50%, so approximate it for a typical window size. */
+  left: 49%; /* LTR */
+  position: fixed;
+  top: 48.5%;
+  z-index: 1000;
+  background-color: #232323;
+  background-image: url(../../../../misc/loading-small.gif);
+  background-position: center center;
+  background-repeat: no-repeat;
+  border-radius: 7px;
+  height: 24px;
+  opacity: 0.9;
+  padding: 4px;
+  width: 24px;
+}
+[dir="rtl"] .ajax-progress-fullscreen {
+  left: auto;
+  right: 49%;
+}
--- a/2017/web/core/modules/system/css/components/align.module.css
+++ b/2017/web/core/modules/system/css/components/align.module.css
@ -0,0 +1,32 @@
+/**
+ * @file
+ * Alignment classes for text and block level elements.
+ */
+
+.text-align-left {
+  text-align: left;
+}
+.text-align-right {
+  text-align: right;
+}
+.text-align-center {
+  text-align: center;
+}
+.text-align-justify {
+  text-align: justify;
+}
+
+/**
+ * Alignment classes for block level elements (images, videos, blockquotes, etc.)
+ */
+.align-left {
+  float: left;
+}
+.align-right {
+  float: right;
+}
+.align-center {
+  display: block;
+  margin-left: auto;
+  margin-right: auto;
+}
--- a/2017/web/core/modules/system/css/components/autocomplete-loading.module.css
+++ b/2017/web/core/modules/system/css/components/autocomplete-loading.module.css
@ -0,0 +1,22 @@
+/**
+ * @file
+ * Visual styles for animated throbber.
+ *
+ * @see autocomplete.js
+ */
+
+.js input.form-autocomplete {
+  background-image: url(../../../../misc/throbber-inactive.png);
+  background-position: 100% center; /* LTR */
+  background-repeat: no-repeat;
+}
+.js[dir="rtl"] input.form-autocomplete {
+  background-position: 0% center;
+}
+.js input.form-autocomplete.ui-autocomplete-loading {
+  background-image: url(../../../../misc/throbber-active.gif);
+  background-position: 100% center; /* LTR */
+}
+.js[dir="rtl"] input.form-autocomplete.ui-autocomplete-loading {
+  background-position: 0% center;
+}
--- a/2017/web/core/modules/system/css/components/clearfix.module.css
+++ b/2017/web/core/modules/system/css/components/clearfix.module.css
@ -0,0 +1,15 @@
+/**
+ * @file
+ * Float clearing.
+ *
+ * Based on the micro clearfix hack by Nicolas Gallagher, with the :before
+ * pseudo selector removed to allow normal top margin collapse.
+ *
+ * @see http://nicolasgallagher.com/micro-clearfix-hack
+ */
+
+.clearfix:after {
+  content: "";
+  display: table;
+  clear: both;
+}
--- a/2017/web/core/modules/system/css/components/container-inline.module.css
+++ b/2017/web/core/modules/system/css/components/container-inline.module.css
@ -0,0 +1,13 @@
+/**
+ * @file
+ * Inline items.
+ */
+
+.container-inline div,
+.container-inline label {
+  display: inline-block;
+}
+/* Details contents always need to be rendered as block. */
+.container-inline .details-wrapper {
+  display: block;
+}
--- a/2017/web/core/modules/system/css/components/details.module.css
+++ b/2017/web/core/modules/system/css/components/details.module.css
@ -0,0 +1,10 @@
+/**
+ * @file
+ * Collapsible details.
+ *
+ * @see collapse.js
+ */
+
+.js details:not([open]) .details-wrapper {
+  display: none;
+}
--- a/2017/web/core/modules/system/css/components/fieldgroup.module.css
+++ b/2017/web/core/modules/system/css/components/fieldgroup.module.css
@ -0,0 +1,9 @@
+/**
+ * @file
+ * Fieldgroup border reset.
+ */
+
+.fieldgroup {
+  border-width: 0;
+  padding: 0;
+}
--- a/2017/web/core/modules/system/css/components/hidden.module.css
+++ b/2017/web/core/modules/system/css/components/hidden.module.css
@ -0,0 +1,53 @@
+/**
+ * @file
+ * Utility classes to hide elements in different ways.
+ */
+
+/**
+ * Hide elements from all users.
+ *
+ * Used for elements which should not be immediately displayed to any user. An
+ * example would be collapsible details that will be expanded with a click
+ * from a user. The effect of this class can be toggled with the jQuery show()
+ * and hide() functions.
+ */
+.hidden {
+  display: none;
+}
+
+/**
+ * Hide elements visually, but keep them available for screen readers.
+ *
+ * Used for information required for screen reader users to understand and use
+ * the site where visual display is undesirable. Information provided in this
+ * manner should be kept concise, to avoid unnecessary burden on the user.
+ * "!important" is used to prevent unintentional overrides.
+ */
+.visually-hidden {
+  position: absolute !important;
+  clip: rect(1px, 1px, 1px, 1px);
+  overflow: hidden;
+  height: 1px;
+  width: 1px;
+  word-wrap: normal;
+}
+
+/**
+ * The .focusable class extends the .visually-hidden class to allow
+ * the element to be focusable when navigated to via the keyboard.
+ */
+.visually-hidden.focusable:active,
+.visually-hidden.focusable:focus {
+  position: static !important;
+  clip: auto;
+  overflow: visible;
+  height: auto;
+  width: auto;
+}
+
+/**
+ * Hide visually and from screen readers, but maintain layout.
+ */
+.invisible {
+  visibility: hidden;
+}
--- a/2017/web/core/modules/system/css/components/item-list.module.css
+++ b/2017/web/core/modules/system/css/components/item-list.module.css
@ -0,0 +1,19 @@
+/**
+ * @file
+ * Styles for item list.
+ */
+
+.item-list__comma-list,
+.item-list__comma-list li {
+  display: inline;
+}
+.item-list__comma-list {
+  margin: 0;
+  padding: 0;
+}
+.item-list__comma-list li:after {
+  content: ", ";
+}
+.item-list__comma-list li:last-child:after {
+  content: "";
+}
--- a/2017/web/core/modules/system/css/components/js.module.css
+++ b/2017/web/core/modules/system/css/components/js.module.css
@ -0,0 +1,22 @@
+/**
+ * @file
+ * Utility classes to assist with Javascript functionality.
+ */
+
+/**
+ * For anything you want to hide on page load when JS is enabled, so
+ * that you can use the JS to control visibility and avoid flicker.
+ */
+.js .js-hide {
+  display: none;
+}
+
+/**
+ * For anything you want to show on page load only when JS is enabled.
+ */
+.js-show {
+  display: none;
+}
+.js .js-show {
+  display: block;
+}
--- a/2017/web/core/modules/system/css/components/nowrap.module.css
+++ b/2017/web/core/modules/system/css/components/nowrap.module.css
@ -0,0 +1,8 @@
+/**
+ * @file
+ * Utility class to prevent text wrapping.
+ */
+
+.nowrap {
+  white-space: nowrap;
+}
--- a/2017/web/core/modules/system/css/components/position-container.module.css
+++ b/2017/web/core/modules/system/css/components/position-container.module.css
@ -0,0 +1,8 @@
+/*
+ * @file
+ * Contain positioned elements.
+ */
+
+.position-container {
+  position: relative;
+}
--- a/2017/web/core/modules/system/css/components/progress.module.css
+++ b/2017/web/core/modules/system/css/components/progress.module.css
@ -0,0 +1,51 @@
+/**
+ * @file
+ * Progress behavior.
+ *
+ * @see progress.js
+ */
+
+.progress {
+  position: relative;
+}
+.progress__track {
+  background-color: #fff;
+  border: 1px solid;
+  margin-top: 5px;
+  max-width: 100%;
+  min-width: 100px;
+  height: 16px;
+}
+.progress__bar {
+  background-color: #000;
+  height: 16px;
+  width: 3%;
+  min-width: 3%;
+  max-width: 100%;
+}
+.progress__description,
+.progress__percentage {
+  color: #555;
+  overflow: hidden;
+  font-size: 0.875em;
+  margin-top: 0.2em;
+}
+.progress__description {
+  float: left; /* LTR */
+}
+[dir="rtl"] .progress__description {
+  float: right;
+}
+.progress__percentage {
+  float: right; /* LTR */
+}
+[dir="rtl"] .progress__percentage {
+  float: left;
+}
+.progress--small .progress__track {
+  height: 7px;
+}
+.progress--small .progress__bar {
+  height: 7px;
+  background-size: 20px 20px;
+}
--- a/2017/web/core/modules/system/css/components/reset-appearance.module.css
+++ b/2017/web/core/modules/system/css/components/reset-appearance.module.css
@ -0,0 +1,15 @@
+/*
+ * @file
+ * Utility class to remove browser styles, especially for button.
+ */
+
+.reset-appearance {
+  -webkit-appearance: none;
+  -moz-appearance: none;
+  appearance: none;
+  border: 0 none;
+  background: transparent;
+  padding: 0;
+  margin: 0;
+  line-height: inherit;
+}
--- a/2017/web/core/modules/system/css/components/resize.module.css
+++ b/2017/web/core/modules/system/css/components/resize.module.css
@ -0,0 +1,21 @@
+/**
+ * @file
+ * Resizable textareas.
+ */
+
+.resize-none {
+  resize: none;
+}
+.resize-vertical {
+  resize: vertical;
+  min-height: 2em;
+}
+.resize-horizontal {
+  resize: horizontal;
+  max-width: 100%;
+}
+.resize-both {
+  resize: both;
+  max-width: 100%;
+  min-height: 2em;
+}
--- a/2017/web/core/modules/system/css/components/sticky-header.module.css
+++ b/2017/web/core/modules/system/css/components/sticky-header.module.css
@ -0,0 +1,13 @@
+/**
+ * @file
+ * Table header behavior.
+ *
+ * @see tableheader.js
+ */
+
+table.sticky-header {
+  background-color: #fff;
+  margin-top: 0;
+  z-index: 500;
+  top: 0;
+}
--- a/2017/web/core/modules/system/css/components/system-status-counter.css
+++ b/2017/web/core/modules/system/css/components/system-status-counter.css
@ -0,0 +1,30 @@
+/**
+ * @file
+ * Styles for the system status counter component.
+ */
+
+.system-status-counter__status-icon {
+  display: inline-block;
+  height: 25px;
+  width: 25px;
+  vertical-align: middle;
+}
+.system-status-counter__status-icon:before {
+  content: "";
+  background-size: 16px;
+  background-position: center 2px;
+  background-repeat: no-repeat;
+  width: 100%;
+  height: 100%;
+  display: block;
+}
+
+.system-status-counter__status-icon--error:before {
+  background-image: url(../../../../misc/icons/e32700/error.svg);
+}
+.system-status-counter__status-icon--warning:before {
+  background-image: url(../../../../misc/icons/e29700/warning.svg);
+}
+.system-status-counter__status-icon--checked:before {
+  background-image: url(../../../../misc/icons/73b355/check.svg);
+}
--- a/2017/web/core/modules/system/css/components/system-status-report-counters.css
+++ b/2017/web/core/modules/system/css/components/system-status-report-counters.css
@ -0,0 +1,27 @@
+/**
+ * @file
+ * Styles for the system status report counters.
+ */
+
+.system-status-report-counters__item {
+  width: 100%;
+  padding: 0.5em 0;
+  text-align: center;
+  white-space: nowrap;
+  background-color: rgba(0, 0, 0, 0.063);
+  margin-bottom: 0.5em;
+}
+
+@media screen and (min-width: 60em) {
+  .system-status-report-counters {
+    flex-wrap: wrap;
+    display: flex;
+    justify-content: space-between;
+  }
+  .system-status-report-counters__item--half-width {
+    width: 49%;
+  }
+  .system-status-report-counters__item--third-width {
+    width: 33%;
+  }
+}
--- a/2017/web/core/modules/system/css/components/system-status-report-general-info.css
+++ b/2017/web/core/modules/system/css/components/system-status-report-general-info.css
@ -0,0 +1,14 @@
+/**
+ * @file
+ * Default styles for the System Status general info.
+ */
+
+.system-status-general-info__item {
+  border: 1px solid #ccc;
+  margin-top: 1em;
+  padding: 0 1em 1em;
+}
+
+.system-status-general-info__item-title {
+  border-bottom: 1px solid #ccc;
+}
--- a/2017/web/core/modules/system/css/components/tabledrag.module.css
+++ b/2017/web/core/modules/system/css/components/tabledrag.module.css
@ -0,0 +1,88 @@
+/**
+ * @file
+ * Table drag behavior.
+ *
+ * @see tabledrag.js
+ */
+
+body.drag {
+  cursor: move;
+}
+tr.region-title {
+  font-weight: bold;
+}
+tr.region-message {
+  color: #999;
+}
+tr.region-populated {
+  display: none;
+}
+tr.add-new .tabledrag-changed {
+  display: none;
+}
+.draggable a.tabledrag-handle {
+  cursor: move;
+  float: left; /* LTR */
+  height: 1.7em;
+  margin-left: -1em; /* LTR */
+  overflow: hidden;
+  text-decoration: none;
+}
+[dir="rtl"] .draggable a.tabledrag-handle {
+  float: right;
+  margin-right: -1em;
+  margin-left: 0;
+}
+a.tabledrag-handle:hover {
+  text-decoration: none;
+}
+a.tabledrag-handle .handle {
+  background: url(../../../../misc/icons/787878/move.svg) no-repeat 6px 7px;
+  height: 14px;
+  margin: -0.4em 0.5em 0;
+  padding: 0.42em 0.5em;
+  width: 14px;
+}
+a.tabledrag-handle:hover .handle,
+a.tabledrag-handle:focus .handle {
+  background-image: url(../../../../misc/icons/000000/move.svg);
+}
+.touchevents .draggable td {
+  padding: 0 10px;
+}
+.touchevents .draggable .menu-item__link {
+  display: inline-block;
+  padding: 10px 0;
+}
+.touchevents a.tabledrag-handle {
+  height: 44px;
+  width: 40px;
+}
+.touchevents a.tabledrag-handle .handle {
+  background-position: 40% 19px; /* LTR */
+  height: 21px;
+}
+[dir="rtl"] .touch a.tabledrag-handle .handle {
+  background-position: right 40% top 19px;
+}
+.touchevents .draggable.drag a.tabledrag-handle .handle {
+  background-position: 50% -32px;
+}
+.tabledrag-toggle-weight-wrapper {
+  text-align: right; /* LTR */
+}
+[dir="rtl"] .tabledrag-toggle-weight-wrapper {
+  text-align: left;
+}
+.indentation {
+  float: left; /* LTR */
+  height: 1.7em;
+  margin: -0.4em 0.2em -0.4em -0.4em; /* LTR */
+  padding: 0.42em 0 0.42em 0.6em; /* LTR */
+  width: 20px;
+}
+[dir="rtl"] .indentation {
+  float: right;
+  margin: -0.4em -0.4em -0.4em 0.2em;
+  padding: 0.42em 0.6em 0.42em 0;
+}
--- a/2017/web/core/modules/system/css/components/tablesort.module.css
+++ b/2017/web/core/modules/system/css/components/tablesort.module.css
@ -0,0 +1,19 @@
+/**
+ * @file
+ * Table sort indicator.
+ *
+ * @see tablesort-indicator.html.twig
+ */
+
+.tablesort {
+  width: 16px;
+  height: 16px;
+  display: inline-block;
+  background-size: 100%;
+}
+.tablesort--asc {
+  background-image: url(../../../../misc/icons/787878/twistie-down.svg);
+}
+.tablesort--desc {
+  background-image: url(../../../../misc/icons/787878/twistie-up.svg);
+}
--- a/2017/web/core/modules/system/css/components/tree-child.module.css
+++ b/2017/web/core/modules/system/css/components/tree-child.module.css
@ -0,0 +1,18 @@
+/**
+ * @file
+ * Visual styles for a nested tree child.
+ */
+
+div.tree-child {
+  background: url(../../../../misc/tree.png) no-repeat 11px center; /* LTR */
+}
+div.tree-child-last {
+  background: url(../../../../misc/tree-bottom.png) no-repeat 11px center; /* LTR */
+}
+[dir="rtl"] div.tree-child,
+[dir="rtl"] div.tree-child-last {
+  background-position: -65px center;
+}
+div.tree-child-horizontal {
+  background: url(../../../../misc/tree.png) no-repeat -11px center;
+}
--- a/2017/web/core/modules/system/css/system.admin.css
+++ b/2017/web/core/modules/system/css/system.admin.css
@ -0,0 +1,401 @@
+/**
+ * @file
+ * Styles for administration pages.
+ */
+
+/**
+ * Reusable layout styles.
+ */
+.layout-container {
+  margin: 0 1.5em;
+}
+.layout-container:after {
+  content: "";
+  display: table;
+  clear: both;
+}
+
+@media screen and (min-width: 38em) {
+  .layout-container {
+    margin: 0 2.5em;
+  }
+  .layout-column {
+    float: left;  /* LTR */
+    box-sizing: border-box;
+  }
+  [dir="rtl"] .layout-column {
+    float: right;
+  }
+  .layout-column + .layout-column {
+    padding-left: 10px; /* LTR */
+  }
+  [dir="rtl"] .layout-column + .layout-column {
+    padding-right: 10px;
+    padding-left: 0;
+  }
+  .layout-column--half {
+    width: 50%;
+  }
+  .layout-column--quarter {
+    width: 25%;
+  }
+  .layout-column--three-quarter {
+    width: 75%;
+  }
+}
+
+/**
+ * Panel.
+ * Used to visually group items together.
+ */
+.panel {
+  padding: 5px 5px 15px;
+}
+.panel__description {
+  margin: 0 0 3px;
+  padding: 2px 0 3px 0;
+}
+
+/**
+ * System compact link: to toggle the display of description text.
+ */
+.compact-link {
+  margin: 0 0 0.5em 0;
+}
+
+/**
+ * Quick inline admin links.
+ */
+small .admin-link:before {
+  content: ' [';
+}
+small .admin-link:after {
+  content: ']';
+}
+
+/**
+ * Modules page.
+ */
+.system-modules thead > tr {
+  border: 0;
+}
+.system-modules div.incompatible {
+  font-weight: bold;
+}
+.system-modules td.checkbox {
+  min-width: 25px;
+  width: 4%;
+}
+.system-modules td.module {
+  width: 25%;
+}
+.system-modules td {
+  vertical-align: top;
+}
+.system-modules label,
+.system-modules-uninstall label {
+  color: #1d1d1d;
+  font-size: 1.15em;
+}
+.system-modules details {
+  color: #5c5c5b;
+  line-height: 20px;
+  overflow: hidden; /* truncates descriptions if too long */
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+.system-modules details[open] {
+  height: auto;
+  overflow: visible;
+  white-space: normal;
+}
+.system-modules details[open] summary .text {
+  -webkit-hyphens: auto;
+  -moz-hyphens: auto;
+  -ms-hyphens: auto;
+  hyphens: auto;
+  text-transform: none;
+}
+.system-modules td details a {
+  color: #5c5c5b;
+  border: 0;
+}
+.system-modules td details {
+  border: 0;
+  margin: 0;
+  height: 20px;
+}
+.system-modules td details summary {
+  padding: 0;
+  text-transform: none;
+  font-weight: normal;
+  cursor: default;
+}
+.system-modules td {
+  padding-left: 0; /* LTR */
+}
+[dir="rtl"] .system-modules td {
+  padding-left: 12px;
+  padding-right: 0;
+}
+
+@media screen and (max-width: 40em) {
+  .system-modules td.name {
+    width: 20%;
+  }
+  .system-modules td.description {
+    width: 40%;
+  }
+}
+.system-modules .requirements {
+  padding: 5px 0;
+  max-width: 490px;
+}
+.system-modules .links {
+  overflow: hidden; /* prevents collapse */
+}
+.system-modules .checkbox {
+  margin: 0 5px;
+}
+.system-modules .checkbox .form-item {
+  margin-bottom: 0;
+}
+.admin-requirements,
+.admin-required {
+  font-size: 0.9em;
+  color: #666;
+}
+.admin-enabled {
+  color: #080;
+}
+.admin-missing {
+  color: #f00;
+}
+.module-link {
+  display: block;
+  padding: 2px 20px;
+  white-space: nowrap;
+  margin-top: 2px;
+  float: left; /* LTR */
+}
+[dir="rtl"] .module-link {
+  float: right;
+}
+.module-link-help {
+  background: url(../../../misc/icons/787878/questionmark-disc.svg) 0 50% no-repeat; /* LTR */
+}
+[dir="rtl"] .module-link-help {
+  background-position: top 50% right 0;
+}
+.module-link-permissions {
+  background: url(../../../misc/icons/787878/key.svg) 0 50% no-repeat; /* LTR */
+}
+[dir="rtl"] .module-link-permissions {
+  background-position: top 50% right 0;
+}
+.module-link-configure {
+  background: url(../../../misc/icons/787878/cog.svg) 0 50% no-repeat; /* LTR */
+}
+[dir="rtl"] .module-link-configure {
+  background-position: top 50% right 0;
+}
+
+/* Status report. */
+.system-status-report__status-title {
+  position: relative;
+  vertical-align: top;
+  width: 100%;
+  padding: 10px 6px 10px 40px; /* LTR */
+  box-sizing: border-box;
+  font-weight: normal;
+  background-color: transparent;
+}
+[dir="rtl"] .system-status-report__status-title {
+  padding: 10px 40px 10px 6px;
+}
+.system-status-report__status-icon:before {
+  content: "";
+  background-repeat: no-repeat;
+  height: 16px;
+  width: 16px;
+  display: block;
+  position: absolute;
+  left: 12px; /* LTR */
+  top: 12px;
+}
+[dir="rtl"] .system-status-report__status-icon:before {
+  left: auto;
+  right: 12px;
+}
+.system-status-report__status-icon--error:before {
+  background-image: url(../../../misc/icons/e32700/error.svg);
+}
+.system-status-report__status-icon--warning:before {
+  background-image: url(../../../misc/icons/e29700/warning.svg);
+}
+.system-status-report__entry__value {
+  padding: 1em 0.5em;
+}
+
+/**
+ * Appearance page.
+ */
+.theme-info__header {
+  margin-bottom: 0;
+  font-weight: normal;
+}
+.theme-default .theme-info__header {
+  font-weight: bold;
+}
+.theme-info__description {
+  margin-top: 0;
+}
+.system-themes-list {
+  margin-bottom: 20px;
+}
+.system-themes-list-uninstalled {
+  border-top: 1px solid #cdcdcd;
+  padding-top: 20px;
+}
+.system-themes-list__header {
+  margin: 0;
+}
+
+.theme-selector {
+  padding-top: 20px;
+}
+.theme-selector .screenshot,
+.theme-selector .no-screenshot {
+  border: 1px solid #e0e0d8;
+  padding: 2px;
+  vertical-align: bottom;
+  max-width: 100%;
+  height: auto;
+  text-align: center;
+}
+.theme-default .screenshot {
+  border: 1px solid #aaa;
+}
+.system-themes-list-uninstalled .screenshot,
+.system-themes-list-uninstalled .no-screenshot {
+  max-width: 194px;
+  height: auto;
+}
+
+/**
+ * Theme display without vertical toolbar.
+ */
+@media screen and (min-width: 45em) {
+  body:not(.toolbar-vertical) .system-themes-list-installed .screenshot,
+  body:not(.toolbar-vertical) .system-themes-list-installed .no-screenshot {
+    float: left; /* LTR */
+    margin: 0 20px 0 0; /* LTR */
+    width: 294px;
+  }
+  [dir="rtl"] body:not(.toolbar-vertical) .system-themes-list-installed .screenshot,
+  [dir="rtl"] body:not(.toolbar-vertical) .system-themes-list-installed .no-screenshot {
+    float: right;
+    margin: 0 0 0 20px;
+  }
+  body:not(.toolbar-vertical) .system-themes-list-installed .system-themes-list__header {
+    margin-top: 0;
+  }
+  body:not(.toolbar-vertical) .system-themes-list-uninstalled .theme-selector {
+    box-sizing: border-box;
+    width: 31.25%;
+    float: left; /* LTR */
+    padding: 20px 20px 20px 0; /* LTR */
+  }
+  [dir="rtl"] body:not(.toolbar-vertical) .system-themes-list-uninstalled .theme-selector {
+    float: right;
+    padding: 20px 0 20px 20px;
+  }
+  body:not(.toolbar-vertical) .system-themes-list-uninstalled .theme-info {
+    min-height: 170px;
+  }
+}
+
+/**
+ * Theme display with vertical toolbar.
+ */
+@media screen and (min-width: 60em) {
+  .toolbar-vertical .system-themes-list-installed .screenshot,
+  .toolbar-vertical .system-themes-list-installed .no-screenshot {
+    float: left; /* LTR */
+    margin: 0 20px 0 0; /* LTR */
+    width: 294px;
+  }
+  [dir="rtl"] .toolbar-vertical .system-themes-list-installed .screenshot,
+  [dir="rtl"] .toolbar-vertical .system-themes-list-installed .no-screenshot {
+    float: right;
+    margin: 0 0 0 20px;
+  }
+  .toolbar-vertical .system-themes-list-installed .theme-info__header {
+    margin-top: 0;
+  }
+  .toolbar-vertical .system-themes-list-uninstalled .theme-selector {
+    box-sizing: border-box;
+    width: 31.25%;
+    float: left; /* LTR */
+    padding: 20px 20px 20px 0; /* LTR */
+  }
+  [dir="rtl"] .toolbar-vertical .system-themes-list-uninstalled .theme-selector {
+    float: right;
+    padding: 20px 0 20px 20px;
+  }
+  .toolbar-vertical .system-themes-list-uninstalled .theme-info {
+    min-height: 170px;
+  }
+}
+.system-themes-list-installed .theme-info {
+  max-width: 940px;
+}
+
+.theme-selector .incompatible {
+  margin-top: 10px;
+  font-weight: bold;
+}
+.theme-selector .operations {
+  margin: 10px 0 0 0;
+  padding: 0;
+}
+.theme-selector .operations li {
+  float: left; /* LTR */
+  margin: 0;
+  padding: 0 0.7em;
+  list-style-type: none;
+  border-right: 1px solid #cdcdcd;  /* LTR */
+}
+[dir="rtl"] .theme-selector .operations li {
+  float: right;
+  border-left: 1px solid #cdcdcd;
+  border-right: none;
+}
+.theme-selector .operations li:last-child {
+  padding: 0 0 0 0.7em; /* LTR */
+  border-right: none; /* LTR */
+}
+[dir="rtl"] .theme-selector .operations li:last-child {
+  padding: 0 0.7em 0 0;
+  border-left: none;
+}
+.theme-selector .operations li:first-child {
+  padding: 0 0.7em 0 0; /* LTR */
+}
+[dir="rtl"] .theme-selector .operations li:first-child {
+  padding: 0 0 0 0.7em;
+}
+.system-themes-admin-form {
+  clear: left; /* LTR */
+}
+[dir="rtl"] .system-themes-admin-form {
+  clear: right;
+}
+.cron-description__run-cron {
+  display: block;
+}
+
+.system-cron-settings__link {
+  overflow-wrap: break-word;
+  word-wrap: break-word;
+}
--- a/2017/web/core/modules/system/css/system.diff.css
+++ b/2017/web/core/modules/system/css/system.diff.css
@ -0,0 +1,41 @@
+/**
+ * Traditional split diff theming
+ */
+table.diff {
+  border-spacing: 4px;
+  margin-bottom: 20px;
+  width: 100%;
+}
+table.diff .diff-context {
+  background-color: #fafafa;
+}
+table.diff .diff-deletedline {
+  background-color: #ffa;
+  width: 50%;
+}
+table.diff .diff-addedline {
+  background-color: #afa;
+  width: 50%;
+}
+table.diff .diffchange {
+  color: #f00;
+  font-weight: bold;
+}
+table.diff .diff-marker {
+  width: 1.4em;
+}
+table.diff th {
+  padding-right: inherit; /* LTR */
+}
+[dir="rtl"] table.diff th {
+  padding-right: 0;
+  padding-left: inherit;
+}
+table.diff td div {
+  overflow: auto;
+  padding: 0.1ex 0.5em;
+  word-wrap: break-word;
+}
+table.diff td {
+  padding: 0.1ex 0.4em;
+}
--- a/2017/web/core/modules/system/css/system.maintenance.css
+++ b/2017/web/core/modules/system/css/system.maintenance.css
@ -0,0 +1,56 @@
+/**
+ * Update styles
+ */
+.update-results {
+  margin-top: 3em;
+  padding: 0.25em;
+  border: 1px solid #ccc;
+  background: #eee;
+  font-size: smaller;
+}
+.update-results h2 {
+  margin-top: 0.25em;
+}
+.update-results h4 {
+  margin-bottom: 0.25em;
+}
+.update-results .none {
+  color: #888;
+  font-style: italic;
+}
+.update-results .failure strong {
+  color: #b63300;
+}
+
+/**
+ * Authorize.php styles
+ */
+#edit-submit-connection {
+  clear: both;
+}
+#edit-submit-process,
+.filetransfer {
+  display: none;
+  clear: both;
+}
+.js #edit-submit-connection {
+  display: none;
+}
+.js #edit-submit-process {
+  display: block;
+}
+
+#edit-connection-settings-change-connection-type {
+  margin: 2.6em 0.5em 0 1em; /* LTR */
+}
+[dir="rtl"] #edit-connection-settings-change-connection-type {
+  margin-left: 0.5em;
+  margin-right: 1em;
+}
+
+/**
+ * Theme maintenance styles
+ */
+.authorize-results__failure {
+  font-weight: bold;
+}
--- a/2017/web/core/modules/system/images/no_screenshot.png
+++ b/2017/web/core/modules/system/images/no_screenshot.png
--- a/2017/web/core/modules/system/js/system.date.es6.js
+++ b/2017/web/core/modules/system/js/system.date.es6.js
@ -0,0 +1,62 @@
+/**
+ * @file
+ * Provides date format preview feature.
+ */
+
+(function($, Drupal, drupalSettings) {
+  const dateFormats = drupalSettings.dateFormats;
+
+  /**
+   * Display the preview for date format entered.
+   *
+   * @type {Drupal~behavior}
+   *
+   * @prop {Drupal~behaviorAttach} attach
+   *   Attach behavior for previewing date formats on input elements.
+   */
+  Drupal.behaviors.dateFormat = {
+    attach(context) {
+      const $context = $(context);
+      const $source = $context
+        .find('[data-drupal-date-formatter="source"]')
+        .once('dateFormat');
+      const $target = $context
+        .find('[data-drupal-date-formatter="preview"]')
+        .once('dateFormat');
+      const $preview = $target.find('em');
+
+      // All elements have to exist.
+      if (!$source.length || !$target.length) {
+        return;
+      }
+
+      /**
+       * Event handler that replaces date characters with value.
+       *
+       * @param {jQuery.Event} e
+       *   The jQuery event triggered.
+       */
+      function dateFormatHandler(e) {
+        const baseValue = $(e.target).val() || '';
+        const dateString = baseValue.replace(
+          /\\?(.?)/gi,
+          (key, value) => (dateFormats[key] ? dateFormats[key] : value),
+        );
+
+        $preview.html(dateString);
+        $target.toggleClass('js-hide', !dateString.length);
+      }
+
+      /**
+       * On given event triggers the date character replacement.
+       */
+      $source
+        .on(
+          'keyup.dateFormat change.dateFormat input.dateFormat',
+          dateFormatHandler,
+        )
+        // Initialize preview.
+        .trigger('keyup');
+    },
+  };
+})(jQuery, Drupal, drupalSettings);
--- a/2017/web/core/modules/system/js/system.date.js
+++ b/2017/web/core/modules/system/js/system.date.js
@ -0,0 +1,35 @@
+/**
+* DO NOT EDIT THIS FILE.
+* See the following change record for more information,
+* https://www.drupal.org/node/2815083
+* @preserve
+**/
+
+(function ($, Drupal, drupalSettings) {
+  var dateFormats = drupalSettings.dateFormats;
+
+  Drupal.behaviors.dateFormat = {
+    attach: function attach(context) {
+      var $context = $(context);
+      var $source = $context.find('[data-drupal-date-formatter="source"]').once('dateFormat');
+      var $target = $context.find('[data-drupal-date-formatter="preview"]').once('dateFormat');
+      var $preview = $target.find('em');
+
+      if (!$source.length || !$target.length) {
+        return;
+      }
+
+      function dateFormatHandler(e) {
+        var baseValue = $(e.target).val() || '';
+        var dateString = baseValue.replace(/\\?(.?)/gi, function (key, value) {
+          return dateFormats[key] ? dateFormats[key] : value;
+        });
+
+        $preview.html(dateString);
+        $target.toggleClass('js-hide', !dateString.length);
+      }
+
+      $source.on('keyup.dateFormat change.dateFormat input.dateFormat', dateFormatHandler).trigger('keyup');
+    }
+  };
+})(jQuery, Drupal, drupalSettings);
--- a/2017/web/core/modules/system/js/system.es6.js
+++ b/2017/web/core/modules/system/js/system.es6.js
@ -0,0 +1,84 @@
+/**
+ * @file
+ * System behaviors.
+ */
+
+(function($, Drupal, drupalSettings) {
+  // Cache IDs in an array for ease of use.
+  const ids = [];
+
+  /**
+   * Attaches field copy behavior from input fields to other input fields.
+   *
+   * When a field is filled out, apply its value to other fields that will
+   * likely use the same value. In the installer this is used to populate the
+   * administrator email address with the same value as the site email address.
+   *
+   * @type {Drupal~behavior}
+   *
+   * @prop {Drupal~behaviorAttach} attach
+   *   Attaches the field copy behavior to an input field.
+   */
+  Drupal.behaviors.copyFieldValue = {
+    attach(context) {
+      // List of fields IDs on which to bind the event listener.
+      // Create an array of IDs to use with jQuery.
+      Object.keys(drupalSettings.copyFieldValue || {}).forEach(element => {
+        ids.push(element);
+      });
+
+      if (ids.length) {
+        // Listen to value:copy events on all dependent fields.
+        // We have to use body and not document because of the way jQuery events
+        // bubble up the DOM tree.
+        $('body')
+          .once('copy-field-values')
+          .on('value:copy', this.valueTargetCopyHandler);
+        // Listen on all source elements.
+        $(`#${ids.join(', #')}`)
+          .once('copy-field-values')
+          .on('blur', this.valueSourceBlurHandler);
+      }
+    },
+    detach(context, settings, trigger) {
+      if (trigger === 'unload' && ids.length) {
+        $('body')
+          .removeOnce('copy-field-values')
+          .off('value:copy');
+        $(`#${ids.join(', #')}`)
+          .removeOnce('copy-field-values')
+          .off('blur');
+      }
+    },
+
+    /**
+     * Event handler that fill the target element with the specified value.
+     *
+     * @param {jQuery.Event} e
+     *   Event object.
+     * @param {string} value
+     *   Custom value from jQuery trigger.
+     */
+    valueTargetCopyHandler(e, value) {
+      const $target = $(e.target);
+      if ($target.val() === '') {
+        $target.val(value);
+      }
+    },
+
+    /**
+     * Handler for a Blur event on a source field.
+     *
+     * This event handler will trigger a 'value:copy' event on all dependent
+     * fields.
+     *
+     * @param {jQuery.Event} e
+     *   The event triggered.
+     */
+    valueSourceBlurHandler(e) {
+      const value = $(e.target).val();
+      const targetIds = drupalSettings.copyFieldValue[e.target.id];
+      $(`#${targetIds.join(', #')}`).trigger('value:copy', value);
+    },
+  };
+})(jQuery, Drupal, drupalSettings);
--- a/2017/web/core/modules/system/js/system.js
+++ b/2017/web/core/modules/system/js/system.js
@ -0,0 +1,41 @@
+/**
+* DO NOT EDIT THIS FILE.
+* See the following change record for more information,
+* https://www.drupal.org/node/2815083
+* @preserve
+**/
+
+(function ($, Drupal, drupalSettings) {
+  var ids = [];
+
+  Drupal.behaviors.copyFieldValue = {
+    attach: function attach(context) {
+      Object.keys(drupalSettings.copyFieldValue || {}).forEach(function (element) {
+        ids.push(element);
+      });
+
+      if (ids.length) {
+        $('body').once('copy-field-values').on('value:copy', this.valueTargetCopyHandler);
+
+        $('#' + ids.join(', #')).once('copy-field-values').on('blur', this.valueSourceBlurHandler);
+      }
+    },
+    detach: function detach(context, settings, trigger) {
+      if (trigger === 'unload' && ids.length) {
+        $('body').removeOnce('copy-field-values').off('value:copy');
+        $('#' + ids.join(', #')).removeOnce('copy-field-values').off('blur');
+      }
+    },
+    valueTargetCopyHandler: function valueTargetCopyHandler(e, value) {
+      var $target = $(e.target);
+      if ($target.val() === '') {
+        $target.val(value);
+      }
+    },
+    valueSourceBlurHandler: function valueSourceBlurHandler(e) {
+      var value = $(e.target).val();
+      var targetIds = drupalSettings.copyFieldValue[e.target.id];
+      $('#' + targetIds.join(', #')).trigger('value:copy', value);
+    }
+  };
+})(jQuery, Drupal, drupalSettings);
--- a/2017/web/core/modules/system/js/system.modules.es6.js
+++ b/2017/web/core/modules/system/js/system.modules.es6.js
@ -0,0 +1,102 @@
+/**
+ * @file
+ * Module page behaviors.
+ */
+
+(function($, Drupal, debounce) {
+  /**
+   * Filters the module list table by a text input search string.
+   *
+   * Additionally accounts for multiple tables being wrapped in "package" details
+   * elements.
+   *
+   * Text search input: input.table-filter-text
+   * Target table:      input.table-filter-text[data-table]
+   * Source text:       .table-filter-text-source, .module-name, .module-description
+   *
+   * @type {Drupal~behavior}
+   */
+  Drupal.behaviors.tableFilterByText = {
+    attach(context, settings) {
+      const $input = $('input.table-filter-text').once('table-filter-text');
+      const $table = $($input.attr('data-table'));
+      let $rowsAndDetails;
+      let $rows;
+      let $details;
+      let searching = false;
+
+      function hidePackageDetails(index, element) {
+        const $packDetails = $(element);
+        const $visibleRows = $packDetails.find('tbody tr:visible');
+        $packDetails.toggle($visibleRows.length > 0);
+      }
+
+      function filterModuleList(e) {
+        const query = $(e.target).val();
+        // Case insensitive expression to find query at the beginning of a word.
+        const re = new RegExp(`\\b${query}`, 'i');
+
+        function showModuleRow(index, row) {
+          const $row = $(row);
+          const $sources = $row.find(
+            '.table-filter-text-source, .module-name, .module-description',
+          );
+          const textMatch = $sources.text().search(re) !== -1;
+          $row.closest('tr').toggle(textMatch);
+        }
+        // Search over all rows and packages.
+        $rowsAndDetails.show();
+
+        // Filter if the length of the query is at least 2 characters.
+        if (query.length >= 2) {
+          searching = true;
+          $rows.each(showModuleRow);
+
+          // Note that we first open all <details> to be able to use ':visible'.
+          // Mark the <details> elements that were closed before filtering, so
+          // they can be reclosed when filtering is removed.
+          $details
+            .not('[open]')
+            .attr('data-drupal-system-state', 'forced-open');
+
+          // Hide the package <details> if they don't have any visible rows.
+          // Note that we first show() all <details> to be able to use ':visible'.
+          $details.attr('open', true).each(hidePackageDetails);
+
+          Drupal.announce(
+            Drupal.t('!modules modules are available in the modified list.', {
+              '!modules': $rowsAndDetails.find('tbody tr:visible').length,
+            }),
+          );
+        } else if (searching) {
+          searching = false;
+          $rowsAndDetails.show();
+          // Return <details> elements that had been closed before filtering
+          // to a closed state.
+          $details
+            .filter('[data-drupal-system-state="forced-open"]')
+            .removeAttr('data-drupal-system-state')
+            .attr('open', false);
+        }
+      }
+
+      function preventEnterKey(event) {
+        if (event.which === 13) {
+          event.preventDefault();
+          event.stopPropagation();
+        }
+      }
+
+      if ($table.length) {
+        $rowsAndDetails = $table.find('tr, details');
+        $rows = $table.find('tbody tr');
+        $details = $rowsAndDetails.filter('.package-listing');
+
+        $input.on({
+          keyup: debounce(filterModuleList, 200),
+          keydown: preventEnterKey,
+        });
+      }
+    },
+  };
+})(jQuery, Drupal, Drupal.debounce);
--- a/2017/web/core/modules/system/js/system.modules.js
+++ b/2017/web/core/modules/system/js/system.modules.js
@ -0,0 +1,76 @@
+/**
+* DO NOT EDIT THIS FILE.
+* See the following change record for more information,
+* https://www.drupal.org/node/2815083
+* @preserve
+**/
+
+(function ($, Drupal, debounce) {
+  Drupal.behaviors.tableFilterByText = {
+    attach: function attach(context, settings) {
+      var $input = $('input.table-filter-text').once('table-filter-text');
+      var $table = $($input.attr('data-table'));
+      var $rowsAndDetails = void 0;
+      var $rows = void 0;
+      var $details = void 0;
+      var searching = false;
+
+      function hidePackageDetails(index, element) {
+        var $packDetails = $(element);
+        var $visibleRows = $packDetails.find('tbody tr:visible');
+        $packDetails.toggle($visibleRows.length > 0);
+      }
+
+      function filterModuleList(e) {
+        var query = $(e.target).val();
+
+        var re = new RegExp('\\b' + query, 'i');
+
+        function showModuleRow(index, row) {
+          var $row = $(row);
+          var $sources = $row.find('.table-filter-text-source, .module-name, .module-description');
+          var textMatch = $sources.text().search(re) !== -1;
+          $row.closest('tr').toggle(textMatch);
+        }
+
+        $rowsAndDetails.show();
+
+        if (query.length >= 2) {
+          searching = true;
+          $rows.each(showModuleRow);
+
+          $details.not('[open]').attr('data-drupal-system-state', 'forced-open');
+
+          $details.attr('open', true).each(hidePackageDetails);
+
+          Drupal.announce(Drupal.t('!modules modules are available in the modified list.', {
+            '!modules': $rowsAndDetails.find('tbody tr:visible').length
+          }));
+        } else if (searching) {
+          searching = false;
+          $rowsAndDetails.show();
+
+          $details.filter('[data-drupal-system-state="forced-open"]').removeAttr('data-drupal-system-state').attr('open', false);
+        }
+      }
+
+      function preventEnterKey(event) {
+        if (event.which === 13) {
+          event.preventDefault();
+          event.stopPropagation();
+        }
+      }
+
+      if ($table.length) {
+        $rowsAndDetails = $table.find('tr, details');
+        $rows = $table.find('tbody tr');
+        $details = $rowsAndDetails.filter('.package-listing');
+
+        $input.on({
+          keyup: debounce(filterModuleList, 200),
+          keydown: preventEnterKey
+        });
+      }
+    }
+  };
+})(jQuery, Drupal, Drupal.debounce);
--- a/2017/web/core/modules/system/migrations/d6_date_formats.yml
+++ b/2017/web/core/modules/system/migrations/d6_date_formats.yml
@ -0,0 +1,23 @@
+id: d6_date_formats
+label: Date format configuration
+migration_tags:
+  - Drupal 6
+  - Configuration
+source:
+  plugin: variable_multirow
+  variables:
+    - date_format_long
+    - date_format_medium
+    - date_format_short
+  source_module: system
+process:
+  id:
+    plugin: static_map
+    source: name
+    map:
+      date_format_long: long
+      date_format_short: short
+      date_format_medium: medium
+  pattern: value
+destination:
+  plugin: entity:date_format
--- a/2017/web/core/modules/system/migrations/d6_menu.yml
+++ b/2017/web/core/modules/system/migrations/d6_menu.yml
@ -0,0 +1,14 @@
+# The menu_settings migration is in the menu_ui module.
+id: d6_menu
+label: Menus
+migration_tags:
+  - Drupal 6
+  - Configuration
+source:
+  plugin: menu
+process:
+  id: menu_name
+  label: title
+  description: description
+destination:
+  plugin: entity:menu
--- a/2017/web/core/modules/system/migrations/d6_system_cron.yml
+++ b/2017/web/core/modules/system/migrations/d6_system_cron.yml
@ -0,0 +1,18 @@
+id: d6_system_cron
+label: Cron settings
+migration_tags:
+  - Drupal 6
+  - Configuration
+source:
+  plugin: variable
+  variables:
+    - cron_threshold_warning
+    - cron_threshold_error
+    - cron_last
+  source_module: system
+process:
+  'threshold/requirements_warning': cron_threshold_warning
+  'threshold/requirements_error': cron_threshold_error
+destination:
+  plugin: config
+  config_name: system.cron
--- a/2017/web/core/modules/system/migrations/d6_system_date.yml
+++ b/2017/web/core/modules/system/migrations/d6_system_date.yml
@ -0,0 +1,21 @@
+id: d6_system_date
+label: System date configuration
+migration_tags:
+  - Drupal 6
+  - Configuration
+source:
+  plugin: variable
+  variables:
+    - configurable_timezones
+    - date_first_day
+    - date_default_timezone
+  source_module: system
+process:
+  'timezone/user/configurable': configurable_timezones
+  first_day: date_first_day
+  'timezone/default':
+    plugin: timezone
+    source: date_default_timezone
+destination:
+  plugin: config
+  config_name: system.date
--- a/2017/web/core/modules/system/migrations/d6_system_file.yml
+++ b/2017/web/core/modules/system/migrations/d6_system_file.yml
@ -0,0 +1,22 @@
+id: d6_system_file
+label: File system configuration
+migration_tags:
+  - Drupal 6
+  - Configuration
+source:
+  plugin: variable
+  variables:
+    - file_directory_temp
+    - allow_insecure_uploads
+  source_module: system
+process:
+  'path/temporary': file_directory_temp
+  allow_insecure_uploads:
+    plugin: static_map
+    source: allow_insecure_uploads
+    map:
+      0: FALSE
+      1: TRUE
+destination:
+  plugin: config
+  config_name: system.file
--- a/2017/web/core/modules/system/migrations/d6_system_performance.yml
+++ b/2017/web/core/modules/system/migrations/d6_system_performance.yml
@ -0,0 +1,21 @@
+id: d6_system_performance
+label: Performance configuration
+migration_tags:
+  - Drupal 6
+  - Configuration
+source:
+  plugin: variable
+  variables:
+    - preprocess_css
+    - preprocess_js
+    - cache_lifetime
+    - cache
+    - page_compression
+  source_module: system
+process:
+  'css/preprocess': preprocess_css
+  'js/preprocess': preprocess_js
+  'cache/page/max_age': cache_lifetime
+destination:
+  plugin: config
+  config_name: system.performance
--- a/2017/web/core/modules/system/migrations/d7_global_theme_settings.yml
+++ b/2017/web/core/modules/system/migrations/d7_global_theme_settings.yml
@ -0,0 +1,31 @@
+id: d7_global_theme_settings
+label: D7 global theme settings
+migration_tags:
+  - Drupal 7
+  - Configuration
+source:
+  plugin: variable
+  variables:
+    - theme_settings
+  source_module: system
+process:
+  'features/logo': theme_settings/toggle_logo
+  'features/name': theme_settings/toggle_name
+  'features/slogan': theme_settings/toggle_slogan
+  'features/node_user_picture': theme_settings/toggle_node_user_picture
+  'features/comment_user_picture': theme_settings/toggle_comment_user_picture
+  'features/comment_user_verification': theme_settings/toggle_comment_user_verification
+  'features/favicon': theme_settings/toggle_favicon
+  'logo/use_default': theme_settings/default_logo
+  'logo/path': theme_settings/logo_path
+  'favicon/use_default': theme_settings/default_favicon
+  'favicon/path': theme_settings/favicon_path
+  'favicon/mimetype': theme_settings/favicon_mimetype
+# Ignore settings not present in Drupal 8
+#  theme_settings/logo_upload
+#  theme_settings/favicon_upload
+#  theme_settings/toggle_main_menu
+#  theme_settings/toggle_secondary_menu
+destination:
+  plugin: config
+  config_name: system.theme.global
--- a/2017/web/core/modules/system/migrations/d7_menu.yml
+++ b/2017/web/core/modules/system/migrations/d7_menu.yml
@ -0,0 +1,21 @@
+id: d7_menu
+label: Menus
+migration_tags:
+  - Drupal 7
+  - Configuration
+source:
+  plugin: menu
+process:
+  id:
+    plugin: static_map
+    bypass: true
+    source: menu_name
+    map:
+      main-menu: main
+      management: admin
+      navigation: tools
+      user-menu: account
+  label: title
+  description: description
+destination:
+  plugin: entity:menu
--- a/2017/web/core/modules/system/migrations/d7_system_authorize.yml
+++ b/2017/web/core/modules/system/migrations/d7_system_authorize.yml
@ -0,0 +1,15 @@
+id: d7_system_authorize
+label: Drupal 7 file transfer authorize configuration
+migration_tags:
+  - Drupal 7
+  - Configuration
+source:
+  plugin: variable
+  variables:
+    - authorize_filetransfer_default
+  source_module: system
+process:
+   filetransfer_default: authorize_filetransfer_default
+destination:
+  plugin: config
+  config_name: system.authorize
--- a/2017/web/core/modules/system/migrations/d7_system_cron.yml
+++ b/2017/web/core/modules/system/migrations/d7_system_cron.yml
@ -0,0 +1,17 @@
+id: d7_system_cron
+label: Drupal 7 cron settings
+migration_tags:
+  - Drupal 7
+  - Configuration
+source:
+  plugin: variable
+  variables:
+    - cron_threshold_warning
+    - cron_threshold_error
+  source_module: system
+process:
+  'threshold/requirements_warning': cron_threshold_warning
+  'threshold/requirements_error': cron_threshold_error
+destination:
+  plugin: config
+  config_name: system.cron
--- a/2017/web/core/modules/system/migrations/d7_system_date.yml
+++ b/2017/web/core/modules/system/migrations/d7_system_date.yml
@ -0,0 +1,25 @@
+id: d7_system_date
+label: Drupal 7 system date configuration
+migration_tags:
+  - Drupal 7
+  - Configuration
+source:
+  plugin: variable
+  variables:
+    - site_default_country
+    - date_first_day
+    - date_default_timezone
+    - configurable_timezones
+    - empty_timezone_message
+    - user_default_timezone
+  source_module: system
+process:
+  'country/default': site_default_country
+  first_day: date_first_day
+  'timezone/default': date_default_timezone
+  'timezone/user/configurable': configurable_timezones
+  'timezone/user/warn': empty_timezone_message
+  'timezone/user/default': user_default_timezone
+destination:
+  plugin: config
+  config_name: system.date
--- a/2017/web/core/modules/system/migrations/d7_system_file.yml
+++ b/2017/web/core/modules/system/migrations/d7_system_file.yml
@ -0,0 +1,22 @@
+id: d7_system_file
+label: Drupal 7 file system configuration
+migration_tags:
+  - Drupal 7
+  - Configuration
+source:
+  plugin: variable
+  variables:
+    - allow_insecure_uploads
+    - file_temporary_path
+  source_module: system
+process:
+  allow_insecure_uploads:
+    plugin: static_map
+    source: allow_insecure_uploads
+    map:
+      0: FALSE
+      1: TRUE
+  'path/temporary': file_temporary_path
+destination:
+  plugin: config
+  config_name: system.file
--- a/2017/web/core/modules/system/migrations/d7_system_mail.yml
+++ b/2017/web/core/modules/system/migrations/d7_system_mail.yml
@ -0,0 +1,20 @@
+id: d7_system_mail
+label: Drupal 7 system mail configuration
+migration_tags:
+  - Drupal 7
+  - Configuration
+source:
+  plugin: variable
+  variables:
+    - mail_system
+  source_module: system
+process:
+  'interface/default':
+    plugin: static_map
+    source: 'mail_system/default-system'
+    map:
+      DefaultMailSystem: php_mail
+      MailTestCase: test_mail_collector
+destination:
+  plugin: config
+  config_name: system.mail
--- a/2017/web/core/modules/system/migrations/d7_system_performance.yml
+++ b/2017/web/core/modules/system/migrations/d7_system_performance.yml
@ -0,0 +1,20 @@
+id: d7_system_performance
+label: Drupal 7 performance configuration
+migration_tags:
+  - Drupal 7
+  - Configuration
+source:
+  plugin: variable
+  variables:
+    - preprocess_css
+    - preprocess_js
+    - cache_lifetime
+    - page_compression
+  source_module: system
+process:
+  'css/preprocess': preprocess_css
+  'js/preprocess': preprocess_js
+  'cache/page/max_age': cache_lifetime
+destination:
+  plugin: config
+  config_name: system.performance
--- a/2017/web/core/modules/system/migrations/d7_theme_settings.yml
+++ b/2017/web/core/modules/system/migrations/d7_theme_settings.yml
@ -0,0 +1,45 @@
+id: d7_theme_settings
+label: D7 theme settings
+migration_tags:
+  - Drupal 7
+  - Configuration
+source:
+  plugin: d7_theme_settings
+  constants:
+    config_suffix: '.settings'
+process:
+  # Build the configuration name from the variable name, i.e.
+  # theme_bartik_settings becomes bartik.settings.
+  theme_name:
+    -
+      plugin: explode
+      source: name
+      delimiter: _
+    -
+      plugin: extract
+      index:
+        - 1
+  configuration_name:
+    plugin: concat
+    source:
+      - '@theme_name'
+      - constants/config_suffix
+  toggle_logo: theme_settings/toggle_logo
+  toggle_name: value/toggle_name
+  toggle_slogan: value/toggle_slogan
+  toggle_node_user_picture: value/toggle_node_user_picture
+  toggle_comment_user_picture: value/toggle_comment_user_picture
+  toggle_comment_user_verification: value/toggle_comment_user_verification
+  toggle_favicon: value/toggle_favicon
+  default_logo: value/default_logo
+  logo_path: value/logo_path
+  logo_upload: value/logo_upload
+  default_favicon: value/default_favicon
+  favicon_path: value/favicon_path
+  favicon_mimetype: value/favicon_mimetype
+# Ignore settings not present in Drupal 8.
+#  value/favicon_upload
+#  value/toggle_main_menu
+#  value/toggle_secondary_menu
+destination:
+  plugin: d7_theme_settings
--- a/2017/web/core/modules/system/migrations/system_image.yml
+++ b/2017/web/core/modules/system/migrations/system_image.yml
@ -0,0 +1,16 @@
+id: system_image
+label: Image toolkit configuration
+migration_tags:
+  - Drupal 6
+  - Drupal 7
+  - Configuration
+source:
+  plugin: variable
+  variables:
+    - image_toolkit
+  source_module: system
+process:
+  toolkit: image_toolkit
+destination:
+  plugin: config
+  config_name: system.image
--- a/2017/web/core/modules/system/migrations/system_image_gd.yml
+++ b/2017/web/core/modules/system/migrations/system_image_gd.yml
@ -0,0 +1,16 @@
+id: system_image_gd
+label: Image quality configuration
+migration_tags:
+  - Drupal 6
+  - Drupal 7
+  - Configuration
+source:
+  plugin: variable
+  variables:
+    - image_jpeg_quality
+  source_module: system
+process:
+  jpeg_quality: image_jpeg_quality
+destination:
+  plugin: config
+  config_name: system.image.gd
--- a/2017/web/core/modules/system/migrations/system_logging.yml
+++ b/2017/web/core/modules/system/migrations/system_logging.yml
@ -0,0 +1,24 @@
+id: system_logging
+label: System logging
+migration_tags:
+  - Drupal 6
+  - Drupal 7
+  - Configuration
+source:
+  plugin: variable
+  variables:
+    - error_level
+  source_module: system
+process:
+  error_level:
+    plugin: static_map
+    source: error_level
+    default_value: all
+    map:
+      0: hide
+      1: some
+      2: all
+      3: verbose
+destination:
+  plugin: config
+  config_name: system.logging
--- a/2017/web/core/modules/system/migrations/system_maintenance.yml
+++ b/2017/web/core/modules/system/migrations/system_maintenance.yml
@ -0,0 +1,16 @@
+id: system_maintenance
+label: Maintenance page configuration
+migration_tags:
+  - Drupal 6
+  - Drupal 7
+  - Configuration
+source:
+  plugin: variable
+  variables:
+    - site_offline_message
+  source_module: system
+process:
+  message: site_offline_message
+destination:
+  plugin: config
+  config_name: system.maintenance
--- a/2017/web/core/modules/system/migrations/system_rss.yml
+++ b/2017/web/core/modules/system/migrations/system_rss.yml
@ -0,0 +1,18 @@
+id: system_rss
+label: RSS configuration
+migration_tags:
+  - Drupal 6
+  - Drupal 7
+  - Configuration
+source:
+  plugin: variable
+  variables:
+    - feed_default_items
+    - feed_item_length
+  source_module: system
+process:
+  'items/limit': feed_default_items
+  'items/view_mode': feed_item_length
+destination:
+  plugin: config
+  config_name: system.rss
--- a/2017/web/core/modules/system/migrations/system_site.yml
+++ b/2017/web/core/modules/system/migrations/system_site.yml
@ -0,0 +1,44 @@
+id: system_site
+label: Site configuration
+migration_tags:
+  - Drupal 6
+  - Drupal 7
+  - Configuration
+source:
+  plugin: variable
+  constants:
+    slash: '/'
+  variables:
+    - site_name
+    - site_mail
+    - site_slogan
+    - site_frontpage
+    - site_403
+    - site_404
+    - drupal_weight_select_max
+    - admin_compact_mode
+  source_module: system
+process:
+  name: site_name
+  mail: site_mail
+  slogan: site_slogan
+  'page/front':
+    plugin: concat
+    source:
+      - constants/slash
+      - site_frontpage
+  'page/403':
+    plugin: concat
+    source:
+      - constants/slash
+      - site_403
+  'page/404':
+    plugin: concat
+    source:
+      - constants/slash
+      - site_404
+  weight_select_max: drupal_weight_select_max
+  admin_compact_mode: admin_compact_mode
+destination:
+  plugin: config
+  config_name: system.site
--- a/2017/web/core/modules/system/src/Access/CronAccessCheck.php
+++ b/2017/web/core/modules/system/src/Access/CronAccessCheck.php
@ -0,0 +1,34 @@
+<?php
+
+namespace Drupal\system\Access;
+
+use Drupal\Core\Access\AccessResult;
+use Drupal\Core\Routing\Access\AccessInterface;
+
+/**
+ * Access check for cron routes.
+ */
+class CronAccessCheck implements AccessInterface {
+
+  /**
+   * Checks access.
+   *
+   * @param string $key
+   *   The cron key.
+   *
+   * @return \Drupal\Core\Access\AccessResultInterface
+   *   The access result.
+   */
+  public function access($key) {
+    if ($key != \Drupal::state()->get('system.cron_key')) {
+      \Drupal::logger('cron')->notice('Cron could not run because an invalid key was used.');
+      return AccessResult::forbidden()->setCacheMaxAge(0);
+    }
+    elseif (\Drupal::state()->get('system.maintenance_mode')) {
+      \Drupal::logger('cron')->notice('Cron could not run because the site is in maintenance mode.');
+      return AccessResult::forbidden()->setCacheMaxAge(0);
+    }
+    return AccessResult::allowed()->setCacheMaxAge(0);
+  }
+
+}
--- a/2017/web/core/modules/system/src/Access/DbUpdateAccessCheck.php
+++ b/2017/web/core/modules/system/src/Access/DbUpdateAccessCheck.php
@ -0,0 +1,38 @@
+<?php
+
+namespace Drupal\system\Access;
+
+use Drupal\Core\Routing\Access\AccessInterface;
+use Drupal\Core\Access\AccessResult;
+use Drupal\Core\Session\AccountInterface;
+use Drupal\Core\Site\Settings;
+
+/**
+ * Access check for database update routes.
+ */
+class DbUpdateAccessCheck implements AccessInterface {
+
+  /**
+   * Checks access for update routes.
+   *
+   * @param \Drupal\Core\Session\AccountInterface $account
+   *   The currently logged in account.
+   *
+   * @return string
+   *   A \Drupal\Core\Access\AccessInterface constant value.
+   */
+  public function access(AccountInterface $account) {
+    // Allow the global variable in settings.php to override the access check.
+    if (Settings::get('update_free_access')) {
+      return AccessResult::allowed()->setCacheMaxAge(0);
+    }
+
+    if ($account->hasPermission('administer software updates')) {
+      return AccessResult::allowed()->cachePerPermissions();
+    }
+    else {
+      return AccessResult::forbidden()->cachePerPermissions();
+    }
+  }
+
+}
--- a/2017/web/core/modules/system/src/ActionConfigEntityInterface.php
+++ b/2017/web/core/modules/system/src/ActionConfigEntityInterface.php
@ -0,0 +1,33 @@
+<?php
+
+namespace Drupal\system;
+
+use Drupal\Core\Config\Entity\ConfigEntityInterface;
+
+/**
+ * Provides an interface defining a action entity.
+ */
+interface ActionConfigEntityInterface extends ConfigEntityInterface {
+
+  /**
+   * Returns whether or not this action is configurable.
+   *
+   * @return bool
+   */
+  public function isConfigurable();
+
+  /**
+   * Returns the operation type.
+   *
+   * @return string
+   */
+  public function getType();
+
+  /**
+   * Returns the operation plugin.
+   *
+   * @return \Drupal\Core\Action\ActionInterface
+   */
+  public function getPlugin();
+
+}
--- a/2017/web/core/modules/system/src/Controller/AdminController.php
+++ b/2017/web/core/modules/system/src/Controller/AdminController.php
@ -0,0 +1,53 @@
+<?php
+
+namespace Drupal\system\Controller;
+
+use Drupal\Core\Controller\ControllerBase;
+
+/**
+ * Controller for admin section.
+ */
+class AdminController extends ControllerBase {
+
+  /**
+   * Prints a listing of admin tasks, organized by module.
+   *
+   * @return array
+   *   A render array containing the listing.
+   */
+  public function index() {
+    $module_info = system_get_info('module');
+    foreach ($module_info as $module => $info) {
+      $module_info[$module] = new \stdClass();
+      $module_info[$module]->info = $info;
+    }
+
+    uasort($module_info, 'system_sort_modules_by_info_name');
+    $menu_items = [];
+
+    foreach ($module_info as $module => $info) {
+      // Only display a section if there are any available tasks.
+      if ($admin_tasks = system_get_module_admin_tasks($module, $info->info)) {
+        // Sort links by title.
+        uasort($admin_tasks, ['\Drupal\Component\Utility\SortArray', 'sortByTitleElement']);
+        // Move 'Configure permissions' links to the bottom of each section.
+        $permission_key = "user.admin_permissions.$module";
+        if (isset($admin_tasks[$permission_key])) {
+          $permission_task = $admin_tasks[$permission_key];
+          unset($admin_tasks[$permission_key]);
+          $admin_tasks[$permission_key] = $permission_task;
+        }
+
+        $menu_items[$info->info['name']] = [$info->info['description'], $admin_tasks];
+      }
+    }
+
+    $output = [
+      '#theme' => 'system_admin_index',
+      '#menu_items' => $menu_items,
+    ];
+
+    return $output;
+  }
+
+}
--- a/2017/web/core/modules/system/src/Controller/BatchController.php
+++ b/2017/web/core/modules/system/src/Controller/BatchController.php
@ -0,0 +1,95 @@
+<?php
+
+namespace Drupal\system\Controller;
+
+use Drupal\Core\DependencyInjection\ContainerInjectionInterface;
+use Symfony\Component\DependencyInjection\ContainerInterface;
+use Symfony\Component\HttpFoundation\Request;
+use Symfony\Component\HttpFoundation\Response;
+use Symfony\Component\HttpKernel\Exception\AccessDeniedHttpException;
+
+/**
+ * Controller routines for batch routes.
+ */
+class BatchController implements ContainerInjectionInterface {
+
+  /**
+   * The app root.
+   *
+   * @var string
+   */
+  protected $root;
+
+  /**
+   * Constructs a new BatchController.
+   *
+   * @param string $root
+   *   The app root.
+   */
+  public function __construct($root) {
+    $this->root = $root;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public static function create(ContainerInterface $container) {
+    return new static(
+      $container->get('app.root')
+    );
+  }
+
+  /**
+   * Returns a system batch page.
+   *
+   * @param \Symfony\Component\HttpFoundation\Request $request
+   *   The current request object.
+   *
+   * @return \Symfony\Component\HttpFoundation\Response|array
+   *   A \Symfony\Component\HttpFoundation\Response object or render array.
+   *
+   * @throws \Symfony\Component\HttpKernel\Exception\AccessDeniedHttpException
+   */
+  public function batchPage(Request $request) {
+    require_once $this->root . '/core/includes/batch.inc';
+    $output = _batch_page($request);
+
+    if ($output === FALSE) {
+      throw new AccessDeniedHttpException();
+    }
+    elseif ($output instanceof Response) {
+      return $output;
+    }
+    elseif (isset($output)) {
+      $title = isset($output['#title']) ? $output['#title'] : NULL;
+      $page = [
+        '#type' => 'page',
+        '#title' => $title,
+        '#show_messages' => FALSE,
+        'content' => $output,
+      ];
+
+      // Also inject title as a page header (if available).
+      if ($title) {
+        $page['header'] = [
+          '#type' => 'page_title',
+          '#title' => $title,
+        ];
+      }
+
+      return $page;
+    }
+  }
+
+  /**
+   * The _title_callback for the system.batch_page.normal route.
+   *
+   * @return string
+   *   The page title.
+   */
+  public function batchPageTitle() {
+    $current_set = _batch_current_set();
+    return !empty($current_set['title']) ? $current_set['title'] : '';
+  }
+
+}
--- a/2017/web/core/modules/system/src/Controller/CsrfTokenController.php
+++ b/2017/web/core/modules/system/src/Controller/CsrfTokenController.php
@ -0,0 +1,52 @@
+<?php
+
+namespace Drupal\system\Controller;
+
+use Drupal\Core\Access\CsrfRequestHeaderAccessCheck;
+use Drupal\Core\Access\CsrfTokenGenerator;
+use Drupal\Core\DependencyInjection\ContainerInjectionInterface;
+use Symfony\Component\DependencyInjection\ContainerInterface;
+use Symfony\Component\HttpFoundation\Response;
+
+/**
+ * Returns responses for CSRF token routes.
+ */
+class CsrfTokenController implements ContainerInjectionInterface {
+
+  /**
+   * The CSRF token generator.
+   *
+   * @var \Drupal\Core\Access\CsrfTokenGenerator
+   */
+  protected $tokenGenerator;
+
+  /**
+   * Constructs a new CsrfTokenController object.
+   *
+   * @param \Drupal\Core\Access\CsrfTokenGenerator $token_generator
+   *   The CSRF token generator.
+   */
+  public function __construct(CsrfTokenGenerator $token_generator) {
+    $this->tokenGenerator = $token_generator;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public static function create(ContainerInterface $container) {
+    return new static(
+      $container->get('csrf_token')
+    );
+  }
+
+  /**
+   * Returns a CSRF protecting session token.
+   *
+   * @return \Symfony\Component\HttpFoundation\Response
+   *   The response object.
+   */
+  public function csrfToken() {
+    return new Response($this->tokenGenerator->get(CsrfRequestHeaderAccessCheck::TOKEN_KEY), 200, ['Content-Type' => 'text/plain']);
+  }
+
+}
--- a/2017/web/core/modules/system/src/Controller/DbUpdateController.php
+++ b/2017/web/core/modules/system/src/Controller/DbUpdateController.php
@ -0,0 +1,705 @@
+<?php
+
+namespace Drupal\system\Controller;
+
+use Drupal\Core\Cache\CacheBackendInterface;
+use Drupal\Core\Controller\ControllerBase;
+use Drupal\Core\Extension\ModuleHandlerInterface;
+use Drupal\Core\KeyValueStore\KeyValueExpirableFactoryInterface;
+use Drupal\Core\Render\BareHtmlPageRendererInterface;
+use Drupal\Core\Session\AccountInterface;
+use Drupal\Core\Site\Settings;
+use Drupal\Core\State\StateInterface;
+use Drupal\Core\Update\UpdateRegistry;
+use Drupal\Core\Url;
+use Symfony\Component\DependencyInjection\ContainerInterface;
+use Symfony\Component\HttpFoundation\Response;
+use Symfony\Component\HttpFoundation\Request;
+
+/**
+ * Controller routines for database update routes.
+ */
+class DbUpdateController extends ControllerBase {
+
+  /**
+   * The keyvalue expirable factory.
+   *
+   * @var \Drupal\Core\KeyValueStore\KeyValueExpirableFactoryInterface
+   */
+  protected $keyValueExpirableFactory;
+
+  /**
+   * A cache backend interface.
+   *
+   * @var \Drupal\Core\Cache\CacheBackendInterface
+   */
+  protected $cache;
+
+  /**
+   * The state service.
+   *
+   * @var \Drupal\Core\State\StateInterface
+   */
+  protected $state;
+
+  /**
+   * The module handler.
+   *
+   * @var \Drupal\Core\Extension\ModuleHandlerInterface
+   */
+  protected $moduleHandler;
+
+  /**
+   * The current user.
+   *
+   * @var \Drupal\Core\Session\AccountInterface
+   */
+  protected $account;
+
+  /**
+   * The bare HTML page renderer.
+   *
+   * @var \Drupal\Core\Render\BareHtmlPageRendererInterface
+   */
+  protected $bareHtmlPageRenderer;
+
+  /**
+   * The app root.
+   *
+   * @var string
+   */
+  protected $root;
+
+  /**
+   * The post update registry.
+   *
+   * @var \Drupal\Core\Update\UpdateRegistry
+   */
+  protected $postUpdateRegistry;
+
+  /**
+   * Constructs a new UpdateController.
+   *
+   * @param string $root
+   *   The app root.
+   * @param \Drupal\Core\KeyValueStore\KeyValueExpirableFactoryInterface $key_value_expirable_factory
+   *   The keyvalue expirable factory.
+   * @param \Drupal\Core\Cache\CacheBackendInterface $cache
+   *   A cache backend interface.
+   * @param \Drupal\Core\State\StateInterface $state
+   *   The state service.
+   * @param \Drupal\Core\Extension\ModuleHandlerInterface $module_handler
+   *   The module handler.
+   * @param \Drupal\Core\Session\AccountInterface $account
+   *   The current user.
+   * @param \Drupal\Core\Render\BareHtmlPageRendererInterface $bare_html_page_renderer
+   *   The bare HTML page renderer.
+   * @param \Drupal\Core\Update\UpdateRegistry $post_update_registry
+   *   The post update registry.
+   */
+  public function __construct($root, KeyValueExpirableFactoryInterface $key_value_expirable_factory, CacheBackendInterface $cache, StateInterface $state, ModuleHandlerInterface $module_handler, AccountInterface $account, BareHtmlPageRendererInterface $bare_html_page_renderer, UpdateRegistry $post_update_registry) {
+    $this->root = $root;
+    $this->keyValueExpirableFactory = $key_value_expirable_factory;
+    $this->cache = $cache;
+    $this->state = $state;
+    $this->moduleHandler = $module_handler;
+    $this->account = $account;
+    $this->bareHtmlPageRenderer = $bare_html_page_renderer;
+    $this->postUpdateRegistry = $post_update_registry;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public static function create(ContainerInterface $container) {
+    return new static(
+      $container->get('app.root'),
+      $container->get('keyvalue.expirable'),
+      $container->get('cache.default'),
+      $container->get('state'),
+      $container->get('module_handler'),
+      $container->get('current_user'),
+      $container->get('bare_html_page_renderer'),
+      $container->get('update.post_update_registry')
+    );
+  }
+
+  /**
+   * Returns a database update page.
+   *
+   * @param string $op
+   *   The update operation to perform. Can be any of the below:
+   *    - info
+   *    - selection
+   *    - run
+   *    - results
+   * @param \Symfony\Component\HttpFoundation\Request $request
+   *   The current request object.
+   *
+   * @return \Symfony\Component\HttpFoundation\Response
+   *   A response object object.
+   */
+  public function handle($op, Request $request) {
+    require_once $this->root . '/core/includes/install.inc';
+    require_once $this->root . '/core/includes/update.inc';
+
+    drupal_load_updates();
+    update_fix_compatibility();
+
+    if ($request->query->get('continue')) {
+      $_SESSION['update_ignore_warnings'] = TRUE;
+    }
+
+    $regions = [];
+    $requirements = update_check_requirements();
+    $severity = drupal_requirements_severity($requirements);
+    if ($severity == REQUIREMENT_ERROR || ($severity == REQUIREMENT_WARNING && empty($_SESSION['update_ignore_warnings']))) {
+      $regions['sidebar_first'] = $this->updateTasksList('requirements');
+      $output = $this->requirements($severity, $requirements, $request);
+    }
+    else {
+      switch ($op) {
+        case 'selection':
+          $regions['sidebar_first'] = $this->updateTasksList('selection');
+          $output = $this->selection($request);
+          break;
+
+        case 'run':
+          $regions['sidebar_first'] = $this->updateTasksList('run');
+          $output = $this->triggerBatch($request);
+          break;
+
+        case 'info':
+          $regions['sidebar_first'] = $this->updateTasksList('info');
+          $output = $this->info($request);
+          break;
+
+        case 'results':
+          $regions['sidebar_first'] = $this->updateTasksList('results');
+          $output = $this->results($request);
+          break;
+
+        // Regular batch ops : defer to batch processing API.
+        default:
+          require_once $this->root . '/core/includes/batch.inc';
+          $regions['sidebar_first'] = $this->updateTasksList('run');
+          $output = _batch_page($request);
+          break;
+      }
+    }
+
+    if ($output instanceof Response) {
+      return $output;
+    }
+    $title = isset($output['#title']) ? $output['#title'] : $this->t('Drupal database update');
+
+    return $this->bareHtmlPageRenderer->renderBarePage($output, $title, 'maintenance_page', $regions);
+  }
+
+  /**
+   * Returns the info database update page.
+   *
+   * @param \Symfony\Component\HttpFoundation\Request $request
+   *   The current request.
+   *
+   * @return array
+   *   A render array.
+   */
+  protected function info(Request $request) {
+    // Change query-strings on css/js files to enforce reload for all users.
+    _drupal_flush_css_js();
+    // Flush the cache of all data for the update status module.
+    $this->keyValueExpirableFactory->get('update')->deleteAll();
+    $this->keyValueExpirableFactory->get('update_available_release')->deleteAll();
+
+    $build['info_header'] = [
+      '#markup' => '<p>' . $this->t('Use this utility to update your database whenever a new release of Drupal or a module is installed.') . '</p><p>' . $this->t('For more detailed information, see the <a href="https://www.drupal.org/upgrade">upgrading handbook</a>. If you are unsure what these terms mean you should probably contact your hosting provider.') . '</p>',
+    ];
+
+    $info[] = $this->t("<strong>Back up your code</strong>. Hint: when backing up module code, do not leave that backup in the 'modules' or 'sites/*/modules' directories as this may confuse Drupal's auto-discovery mechanism.");
+    $info[] = $this->t('Put your site into <a href=":url">maintenance mode</a>.', [
+      ':url' => Url::fromRoute('system.site_maintenance_mode')->toString(TRUE)->getGeneratedUrl(),
+    ]);
+    $info[] = $this->t('<strong>Back up your database</strong>. This process will change your database values and in case of emergency you may need to revert to a backup.');
+    $info[] = $this->t('Install your new files in the appropriate location, as described in the handbook.');
+    $build['info'] = [
+      '#theme' => 'item_list',
+      '#list_type' => 'ol',
+      '#items' => $info,
+    ];
+    $build['info_footer'] = [
+      '#markup' => '<p>' . $this->t('When you have performed the steps above, you may proceed.') . '</p>',
+    ];
+
+    $build['link'] = [
+      '#type' => 'link',
+      '#title' => $this->t('Continue'),
+      '#attributes' => ['class' => ['button', 'button--primary']],
+      // @todo Revisit once https://www.drupal.org/node/2548095 is in.
+      '#url' => Url::fromUri('base://selection'),
+    ];
+    return $build;
+  }
+
+  /**
+   * Renders a list of available database updates.
+   *
+   * @param \Symfony\Component\HttpFoundation\Request $request
+   *   The current request.
+   *
+   * @return array
+   *   A render array.
+   */
+  protected function selection(Request $request) {
+    // Make sure there is no stale theme registry.
+    $this->cache->deleteAll();
+
+    $count = 0;
+    $incompatible_count = 0;
+    $build['start'] = [
+      '#tree' => TRUE,
+      '#type' => 'details',
+    ];
+
+    // Ensure system.module's updates appear first.
+    $build['start']['system'] = [];
+
+    $starting_updates = [];
+    $incompatible_updates_exist = FALSE;
+    $updates_per_module = [];
+    foreach (['update', 'post_update'] as $update_type) {
+      switch ($update_type) {
+        case 'update':
+          $updates = update_get_update_list();
+          break;
+        case 'post_update':
+          $updates = $this->postUpdateRegistry->getPendingUpdateInformation();
+          break;
+      }
+      foreach ($updates as $module => $update) {
+        if (!isset($update['start'])) {
+          $build['start'][$module] = [
+            '#type' => 'item',
+            '#title' => $module . ' module',
+            '#markup' => $update['warning'],
+            '#prefix' => '<div class="messages messages--warning">',
+            '#suffix' => '</div>',
+          ];
+          $incompatible_updates_exist = TRUE;
+          continue;
+        }
+        if (!empty($update['pending'])) {
+          $updates_per_module += [$module => []];
+          $updates_per_module[$module] = array_merge($updates_per_module[$module], $update['pending']);
+          $build['start'][$module] = [
+            '#type' => 'hidden',
+            '#value' => $update['start'],
+          ];
+          // Store the previous items in order to merge normal updates and
+          // post_update functions together.
+          $build['start'][$module] = [
+            '#theme' => 'item_list',
+            '#items' => $updates_per_module[$module],
+            '#title' => $module . ' module',
+          ];
+
+          if ($update_type === 'update') {
+            $starting_updates[$module] = $update['start'];
+          }
+        }
+        if (isset($update['pending'])) {
+          $count = $count + count($update['pending']);
+        }
+      }
+    }
+
+    // Find and label any incompatible updates.
+    foreach (update_resolve_dependencies($starting_updates) as $data) {
+      if (!$data['allowed']) {
+        $incompatible_updates_exist = TRUE;
+        $incompatible_count++;
+        $module_update_key = $data['module'] . '_updates';
+        if (isset($build['start'][$module_update_key]['#items'][$data['number']])) {
+          if ($data['missing_dependencies']) {
+            $text = $this->t('This update will been skipped due to the following missing dependencies:') . '<em>' . implode(', ', $data['missing_dependencies']) . '</em>';
+          }
+          else {
+            $text = $this->t("This update will be skipped due to an error in the module's code.");
+          }
+          $build['start'][$module_update_key]['#items'][$data['number']] .= '<div class="warning">' . $text . '</div>';
+        }
+        // Move the module containing this update to the top of the list.
+        $build['start'] = [$module_update_key => $build['start'][$module_update_key]] + $build['start'];
+      }
+    }
+
+    // Warn the user if any updates were incompatible.
+    if ($incompatible_updates_exist) {
+      $this->messenger()->addWarning($this->t('Some of the pending updates cannot be applied because their dependencies were not met.'));
+    }
+
+    if (empty($count)) {
+      $this->messenger()->addStatus($this->t('No pending updates.'));
+      unset($build);
+      $build['links'] = [
+        '#theme' => 'links',
+        '#links' => $this->helpfulLinks($request),
+      ];
+
+      // No updates to run, so caches won't get flushed later.  Clear them now.
+      drupal_flush_all_caches();
+    }
+    else {
+      $build['help'] = [
+        '#markup' => '<p>' . $this->t('The version of Drupal you are updating from has been automatically detected.') . '</p>',
+        '#weight' => -5,
+      ];
+      if ($incompatible_count) {
+        $build['start']['#title'] = $this->formatPlural(
+          $count,
+          '1 pending update (@number_applied to be applied, @number_incompatible skipped)',
+          '@count pending updates (@number_applied to be applied, @number_incompatible skipped)',
+          ['@number_applied' => $count - $incompatible_count, '@number_incompatible' => $incompatible_count]
+        );
+      }
+      else {
+        $build['start']['#title'] = $this->formatPlural($count, '1 pending update', '@count pending updates');
+      }
+      // @todo Simplify with https://www.drupal.org/node/2548095
+      $base_url = str_replace('/update.php', '', $request->getBaseUrl());
+      $url = (new Url('system.db_update', ['op' => 'run']))->setOption('base_url', $base_url);
+      $build['link'] = [
+        '#type' => 'link',
+        '#title' => $this->t('Apply pending updates'),
+        '#attributes' => ['class' => ['button', 'button--primary']],
+        '#weight' => 5,
+        '#url' => $url,
+        '#access' => $url->access($this->currentUser()),
+      ];
+    }
+
+    return $build;
+  }
+
+  /**
+   * Displays results of the update script with any accompanying errors.
+   *
+   * @param \Symfony\Component\HttpFoundation\Request $request
+   *   The current request.
+   *
+   * @return array
+   *   A render array.
+   */
+  protected function results(Request $request) {
+    // @todo Simplify with https://www.drupal.org/node/2548095
+    $base_url = str_replace('/update.php', '', $request->getBaseUrl());
+
+    // Report end result.
+    $dblog_exists = $this->moduleHandler->moduleExists('dblog');
+    if ($dblog_exists && $this->account->hasPermission('access site reports')) {
+      $log_message = $this->t('All errors have been <a href=":url">logged</a>.', [
+        ':url' => Url::fromRoute('dblog.overview')->setOption('base_url', $base_url)->toString(TRUE)->getGeneratedUrl(),
+      ]);
+    }
+    else {
+      $log_message = $this->t('All errors have been logged.');
+    }
+
+    if (!empty($_SESSION['update_success'])) {
+      $message = '<p>' . $this->t('Updates were attempted. If you see no failures below, you may proceed happily back to your <a href=":url">site</a>. Otherwise, you may need to update your database manually.', [':url' => Url::fromRoute('<front>')->setOption('base_url', $base_url)->toString(TRUE)->getGeneratedUrl()]) . ' ' . $log_message . '</p>';
+    }
+    else {
+      $last = reset($_SESSION['updates_remaining']);
+      list($module, $version) = array_pop($last);
+      $message = '<p class="error">' . $this->t('The update process was aborted prematurely while running <strong>update #@version in @module.module</strong>.', [
+        '@version' => $version,
+        '@module' => $module,
+      ]) . ' ' . $log_message;
+      if ($dblog_exists) {
+        $message .= ' ' . $this->t('You may need to check the <code>watchdog</code> database table manually.');
+      }
+      $message .= '</p>';
+    }
+
+    if (Settings::get('update_free_access')) {
+      $message .= '<p>' . $this->t("<strong>Reminder: don't forget to set the <code>\$settings['update_free_access']</code> value in your <code>settings.php</code> file back to <code>FALSE</code>.</strong>") . '</p>';
+    }
+
+    $build['message'] = [
+      '#markup' => $message,
+    ];
+    $build['links'] = [
+      '#theme' => 'links',
+      '#links' => $this->helpfulLinks($request),
+    ];
+
+    // Output a list of info messages.
+    if (!empty($_SESSION['update_results'])) {
+      $all_messages = [];
+      foreach ($_SESSION['update_results'] as $module => $updates) {
+        if ($module != '#abort') {
+          $module_has_message = FALSE;
+          $info_messages = [];
+          foreach ($updates as $name => $queries) {
+            $messages = [];
+            foreach ($queries as $query) {
+              // If there is no message for this update, don't show anything.
+              if (empty($query['query'])) {
+                continue;
+              }
+
+              if ($query['success']) {
+                $messages[] = [
+                  '#wrapper_attributes' => ['class' => ['success']],
+                  '#markup' => $query['query'],
+                ];
+              }
+              else {
+                $messages[] = [
+                  '#wrapper_attributes' => ['class' => ['failure']],
+                  '#markup' => '<strong>' . $this->t('Failed:') . '</strong> ' . $query['query'],
+                ];
+              }
+            }
+
+            if ($messages) {
+              $module_has_message = TRUE;
+              if (is_numeric($name)) {
+                $title = $this->t('Update #@count', ['@count' => $name]);
+              }
+              else {
+                $title = $this->t('Update @name', ['@name' => trim($name, '_')]);
+              }
+              $info_messages[] = [
+                '#theme' => 'item_list',
+                '#items' => $messages,
+                '#title' => $title,
+              ];
+            }
+          }
+
+          // If there were any messages then prefix them with the module name
+          // and add it to the global message list.
+          if ($module_has_message) {
+            $all_messages[] = [
+              '#type' => 'container',
+              '#prefix' => '<h3>' . $this->t('@module module', ['@module' => $module]) . '</h3>',
+              '#children' => $info_messages,
+            ];
+          }
+        }
+      }
+      if ($all_messages) {
+        $build['query_messages'] = [
+          '#type' => 'container',
+          '#children' => $all_messages,
+          '#attributes' => ['class' => ['update-results']],
+          '#prefix' => '<h2>' . $this->t('The following updates returned messages:') . '</h2>',
+        ];
+      }
+    }
+    unset($_SESSION['update_results']);
+    unset($_SESSION['update_success']);
+    unset($_SESSION['update_ignore_warnings']);
+
+    return $build;
+  }
+
+  /**
+   * Renders a list of requirement errors or warnings.
+   *
+   * @param \Symfony\Component\HttpFoundation\Request $request
+   *   The current request.
+   *
+   * @return array
+   *   A render array.
+   */
+  public function requirements($severity, array $requirements, Request $request) {
+    $options = $severity == REQUIREMENT_WARNING ? ['continue' => 1] : [];
+    // @todo Revisit once https://www.drupal.org/node/2548095 is in. Something
+    // like Url::fromRoute('system.db_update')->setOptions() should then be
+    // possible.
+    $try_again_url = Url::fromUri($request->getUriForPath(''))->setOptions(['query' => $options])->toString(TRUE)->getGeneratedUrl();
+
+    $build['status_report'] = [
+      '#type' => 'status_report',
+      '#requirements' => $requirements,
+      '#suffix' => $this->t('Check the messages and <a href=":url">try again</a>.', [':url' => $try_again_url]),
+    ];
+
+    $build['#title'] = $this->t('Requirements problem');
+    return $build;
+  }
+
+  /**
+   * Provides the update task list render array.
+   *
+   * @param string $active
+   *   The active task.
+   *   Can be one of 'requirements', 'info', 'selection', 'run', 'results'.
+   *
+   * @return array
+   *   A render array.
+   */
+  protected function updateTasksList($active = NULL) {
+    // Default list of tasks.
+    $tasks = [
+      'requirements' => $this->t('Verify requirements'),
+      'info' => $this->t('Overview'),
+      'selection' => $this->t('Review updates'),
+      'run' => $this->t('Run updates'),
+      'results' => $this->t('Review log'),
+    ];
+
+    $task_list = [
+      '#theme' => 'maintenance_task_list',
+      '#items' => $tasks,
+      '#active' => $active,
+    ];
+    return $task_list;
+  }
+
+  /**
+   * Starts the database update batch process.
+   *
+   * @param \Symfony\Component\HttpFoundation\Request $request
+   *   The current request object.
+   */
+  protected function triggerBatch(Request $request) {
+    $maintenance_mode = $this->state->get('system.maintenance_mode', FALSE);
+    // Store the current maintenance mode status in the session so that it can
+    // be restored at the end of the batch.
+    $_SESSION['maintenance_mode'] = $maintenance_mode;
+    // During the update, always put the site into maintenance mode so that
+    // in-progress schema changes do not affect visiting users.
+    if (empty($maintenance_mode)) {
+      $this->state->set('system.maintenance_mode', TRUE);
+    }
+
+    $operations = [];
+
+    // Resolve any update dependencies to determine the actual updates that will
+    // be run and the order they will be run in.
+    $start = $this->getModuleUpdates();
+    $updates = update_resolve_dependencies($start);
+
+    // Store the dependencies for each update function in an array which the
+    // batch API can pass in to the batch operation each time it is called. (We
+    // do not store the entire update dependency array here because it is
+    // potentially very large.)
+    $dependency_map = [];
+    foreach ($updates as $function => $update) {
+      $dependency_map[$function] = !empty($update['reverse_paths']) ? array_keys($update['reverse_paths']) : [];
+    }
+
+    // Determine updates to be performed.
+    foreach ($updates as $function => $update) {
+      if ($update['allowed']) {
+        // Set the installed version of each module so updates will start at the
+        // correct place. (The updates are already sorted, so we can simply base
+        // this on the first one we come across in the above foreach loop.)
+        if (isset($start[$update['module']])) {
+          drupal_set_installed_schema_version($update['module'], $update['number'] - 1);
+          unset($start[$update['module']]);
+        }
+        $operations[] = ['update_do_one', [$update['module'], $update['number'], $dependency_map[$function]]];
+      }
+    }
+
+    $post_updates = $this->postUpdateRegistry->getPendingUpdateFunctions();
+
+    if ($post_updates) {
+      // Now we rebuild all caches and after that execute the hook_post_update()
+      // functions.
+      $operations[] = ['drupal_flush_all_caches', []];
+      foreach ($post_updates as $function) {
+        $operations[] = ['update_invoke_post_update', [$function]];
+      }
+    }
+
+    $batch['operations'] = $operations;
+    $batch += [
+      'title' => $this->t('Updating'),
+      'init_message' => $this->t('Starting updates'),
+      'error_message' => $this->t('An unrecoverable error has occurred. You can find the error message below. It is advised to copy it to the clipboard for reference.'),
+      'finished' => ['\Drupal\system\Controller\DbUpdateController', 'batchFinished'],
+    ];
+    batch_set($batch);
+
+    // @todo Revisit once https://www.drupal.org/node/2548095 is in.
+    return batch_process(Url::fromUri('base://results'), Url::fromUri('base://start'));
+  }
+
+  /**
+   * Finishes the update process and stores the results for eventual display.
+   *
+   * After the updates run, all caches are flushed. The update results are
+   * stored into the session (for example, to be displayed on the update results
+   * page in update.php). Additionally, if the site was off-line, now that the
+   * update process is completed, the site is set back online.
+   *
+   * @param $success
+   *   Indicate that the batch API tasks were all completed successfully.
+   * @param array $results
+   *   An array of all the results that were updated in update_do_one().
+   * @param array $operations
+   *   A list of all the operations that had not been completed by the batch API.
+   */
+  public static function batchFinished($success, $results, $operations) {
+    // No updates to run, so caches won't get flushed later.  Clear them now.
+    drupal_flush_all_caches();
+
+    $_SESSION['update_results'] = $results;
+    $_SESSION['update_success'] = $success;
+    $_SESSION['updates_remaining'] = $operations;
+
+    // Now that the update is done, we can put the site back online if it was
+    // previously not in maintenance mode.
+    if (empty($_SESSION['maintenance_mode'])) {
+      \Drupal::state()->set('system.maintenance_mode', FALSE);
+    }
+    unset($_SESSION['maintenance_mode']);
+  }
+
+  /**
+   * Provides links to the homepage and administration pages.
+   *
+   * @param \Symfony\Component\HttpFoundation\Request $request
+   *   The current request.
+   *
+   * @return array
+   *   An array of links.
+   */
+  protected function helpfulLinks(Request $request) {
+    // @todo Simplify with https://www.drupal.org/node/2548095
+    $base_url = str_replace('/update.php', '', $request->getBaseUrl());
+    $links['front'] = [
+      'title' => $this->t('Front page'),
+      'url' => Url::fromRoute('<front>')->setOption('base_url', $base_url),
+    ];
+    if ($this->account->hasPermission('access administration pages')) {
+      $links['admin-pages'] = [
+        'title' => $this->t('Administration pages'),
+        'url' => Url::fromRoute('system.admin')->setOption('base_url', $base_url),
+      ];
+    }
+    return $links;
+  }
+
+  /**
+   * Retrieves module updates.
+   *
+   * @return array
+   *   The module updates that can be performed.
+   */
+  protected function getModuleUpdates() {
+    $return = [];
+    $updates = update_get_update_list();
+    foreach ($updates as $module => $update) {
+      $return[$module] = $update['start'];
+    }
+
+    return $return;
+  }
+
+}
--- a/2017/web/core/modules/system/src/Controller/EntityAutocompleteController.php
+++ b/2017/web/core/modules/system/src/Controller/EntityAutocompleteController.php
@ -0,0 +1,108 @@
+<?php
+
+namespace Drupal\system\Controller;
+
+use Drupal\Component\Utility\Crypt;
+use Drupal\Component\Utility\Tags;
+use Drupal\Core\Controller\ControllerBase;
+use Drupal\Core\Entity\EntityAutocompleteMatcher;
+use Drupal\Core\KeyValueStore\KeyValueStoreInterface;
+use Drupal\Core\Site\Settings;
+use Symfony\Component\DependencyInjection\ContainerInterface;
+use Symfony\Component\HttpFoundation\JsonResponse;
+use Symfony\Component\HttpFoundation\Request;
+use Symfony\Component\HttpKernel\Exception\AccessDeniedHttpException;
+
+/**
+ * Defines a route controller for entity autocomplete form elements.
+ */
+class EntityAutocompleteController extends ControllerBase {
+
+  /**
+   * The autocomplete matcher for entity references.
+   *
+   * @var \Drupal\Core\Entity\EntityAutocompleteMatcher
+   */
+  protected $matcher;
+
+  /**
+   * The key value store.
+   *
+   * @var \Drupal\Core\KeyValueStore\KeyValueStoreInterface
+   */
+  protected $keyValue;
+
+  /**
+   * Constructs a EntityAutocompleteController object.
+   *
+   * @param \Drupal\Core\Entity\EntityAutocompleteMatcher $matcher
+   *   The autocomplete matcher for entity references.
+   * @param \Drupal\Core\KeyValueStore\KeyValueStoreInterface $key_value
+   *   The key value factory.
+   */
+  public function __construct(EntityAutocompleteMatcher $matcher, KeyValueStoreInterface $key_value) {
+    $this->matcher = $matcher;
+    $this->keyValue = $key_value;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public static function create(ContainerInterface $container) {
+    return new static(
+      $container->get('entity.autocomplete_matcher'),
+      $container->get('keyvalue')->get('entity_autocomplete')
+    );
+  }
+
+  /**
+   * Autocomplete the label of an entity.
+   *
+   * @param \Symfony\Component\HttpFoundation\Request $request
+   *   The request object that contains the typed tags.
+   * @param string $target_type
+   *   The ID of the target entity type.
+   * @param string $selection_handler
+   *   The plugin ID of the entity reference selection handler.
+   * @param string $selection_settings_key
+   *   The hashed key of the key/value entry that holds the selection handler
+   *   settings.
+   *
+   * @return \Symfony\Component\HttpFoundation\JsonResponse
+   *   The matched entity labels as a JSON response.
+   *
+   * @throws \Symfony\Component\HttpKernel\Exception\AccessDeniedHttpException
+   *   Thrown if the selection settings key is not found in the key/value store
+   *   or if it does not match the stored data.
+   */
+  public function handleAutocomplete(Request $request, $target_type, $selection_handler, $selection_settings_key) {
+    $matches = [];
+    // Get the typed string from the URL, if it exists.
+    if ($input = $request->query->get('q')) {
+      $typed_string = Tags::explode($input);
+      $typed_string = mb_strtolower(array_pop($typed_string));
+
+      // Selection settings are passed in as a hashed key of a serialized array
+      // stored in the key/value store.
+      $selection_settings = $this->keyValue->get($selection_settings_key, FALSE);
+      if ($selection_settings !== FALSE) {
+        $selection_settings_hash = Crypt::hmacBase64(serialize($selection_settings) . $target_type . $selection_handler, Settings::getHashSalt());
+        if ($selection_settings_hash !== $selection_settings_key) {
+          // Disallow access when the selection settings hash does not match the
+          // passed-in key.
+          throw new AccessDeniedHttpException('Invalid selection settings key.');
+        }
+      }
+      else {
+        // Disallow access when the selection settings key is not found in the
+        // key/value store.
+        throw new AccessDeniedHttpException();
+      }
+
+      $matches = $this->matcher->getMatches($target_type, $selection_handler, $selection_settings, $typed_string);
+    }
+
+    return new JsonResponse($matches);
+  }
+
+}
--- a/2017/web/core/modules/system/src/Controller/Http4xxController.php
+++ b/2017/web/core/modules/system/src/Controller/Http4xxController.php
@ -0,0 +1,60 @@
+<?php
+
+namespace Drupal\system\Controller;
+
+use Drupal\Core\Controller\ControllerBase;
+
+/**
+ * Controller for default HTTP 4xx responses.
+ */
+class Http4xxController extends ControllerBase {
+
+  /**
+   * The default 4xx error content.
+   *
+   * @return array
+   *   A render array containing the message to display for 4xx errors.
+   */
+  public function on4xx() {
+    return [
+      '#markup' => $this->t('A client error happened'),
+    ];
+  }
+
+  /**
+   * The default 401 content.
+   *
+   * @return array
+   *   A render array containing the message to display for 401 pages.
+   */
+  public function on401() {
+    return [
+      '#markup' => $this->t('Please log in to access this page.'),
+    ];
+  }
+
+  /**
+   * The default 403 content.
+   *
+   * @return array
+   *   A render array containing the message to display for 403 pages.
+   */
+  public function on403() {
+    return [
+      '#markup' => $this->t('You are not authorized to access this page.'),
+    ];
+  }
+
+  /**
+   * The default 404 content.
+   *
+   * @return array
+   *   A render array containing the message to display for 404 pages.
+   */
+  public function on404() {
+    return [
+      '#markup' => $this->t('The requested page could not be found.'),
+    ];
+  }
+
+}
--- a/2017/web/core/modules/system/src/Controller/SystemController.php
+++ b/2017/web/core/modules/system/src/Controller/SystemController.php
@ -0,0 +1,327 @@
+<?php
+
+namespace Drupal\system\Controller;
+
+use Drupal\Core\Cache\CacheableMetadata;
+use Drupal\Core\Controller\ControllerBase;
+use Drupal\Core\Extension\ThemeHandlerInterface;
+use Drupal\Core\Form\FormBuilderInterface;
+use Drupal\Core\Menu\MenuLinkTreeInterface;
+use Drupal\Core\Menu\MenuTreeParameters;
+use Drupal\Core\Theme\ThemeAccessCheck;
+use Drupal\Core\Url;
+use Drupal\system\SystemManager;
+use Symfony\Component\DependencyInjection\ContainerInterface;
+
+/**
+ * Returns responses for System routes.
+ */
+class SystemController extends ControllerBase {
+
+  /**
+   * System Manager Service.
+   *
+   * @var \Drupal\system\SystemManager
+   */
+  protected $systemManager;
+
+  /**
+   * The theme access checker service.
+   *
+   * @var \Drupal\Core\Theme\ThemeAccessCheck
+   */
+  protected $themeAccess;
+
+  /**
+   * The form builder service.
+   *
+   * @var \Drupal\Core\Form\FormBuilderInterface
+   */
+  protected $formBuilder;
+
+  /**
+   * The theme handler service.
+   *
+   * @var \Drupal\Core\Extension\ThemeHandlerInterface
+   */
+  protected $themeHandler;
+
+  /**
+   * The menu link tree service.
+   *
+   * @var \Drupal\Core\Menu\MenuLinkTreeInterface
+   */
+  protected $menuLinkTree;
+
+  /**
+   * Constructs a new SystemController.
+   *
+   * @param \Drupal\system\SystemManager $systemManager
+   *   System manager service.
+   * @param \Drupal\Core\Theme\ThemeAccessCheck $theme_access
+   *   The theme access checker service.
+   * @param \Drupal\Core\Form\FormBuilderInterface $form_builder
+   *   The form builder.
+   * @param \Drupal\Core\Extension\ThemeHandlerInterface $theme_handler
+   *   The theme handler.
+   * @param \Drupal\Core\Menu\MenuLinkTreeInterface $menu_link_tree
+   *   The menu link tree service.
+   */
+  public function __construct(SystemManager $systemManager, ThemeAccessCheck $theme_access, FormBuilderInterface $form_builder, ThemeHandlerInterface $theme_handler, MenuLinkTreeInterface $menu_link_tree) {
+    $this->systemManager = $systemManager;
+    $this->themeAccess = $theme_access;
+    $this->formBuilder = $form_builder;
+    $this->themeHandler = $theme_handler;
+    $this->menuLinkTree = $menu_link_tree;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public static function create(ContainerInterface $container) {
+    return new static(
+      $container->get('system.manager'),
+      $container->get('access_check.theme'),
+      $container->get('form_builder'),
+      $container->get('theme_handler'),
+      $container->get('menu.link_tree')
+    );
+  }
+
+  /**
+   * Provide the administration overview page.
+   *
+   * @param string $link_id
+   *   The ID of the administrative path link for which to display child links.
+   *
+   * @return array
+   *   A renderable array of the administration overview page.
+   */
+  public function overview($link_id) {
+    // Check for status report errors.
+    if ($this->systemManager->checkRequirements() && $this->currentUser()->hasPermission('administer site configuration')) {
+      $this->messenger()->addError($this->t('One or more problems were detected with your Drupal installation. Check the <a href=":status">status report</a> for more information.', [':status' => $this->url('system.status')]));
+    }
+    // Load all menu links below it.
+    $parameters = new MenuTreeParameters();
+    $parameters->setRoot($link_id)->excludeRoot()->setTopLevelOnly()->onlyEnabledLinks();
+    $tree = $this->menuLinkTree->load(NULL, $parameters);
+    $manipulators = [
+      ['callable' => 'menu.default_tree_manipulators:checkAccess'],
+      ['callable' => 'menu.default_tree_manipulators:generateIndexAndSort'],
+    ];
+    $tree = $this->menuLinkTree->transform($tree, $manipulators);
+    $tree_access_cacheability = new CacheableMetadata();
+    $blocks = [];
+    foreach ($tree as $key => $element) {
+      $tree_access_cacheability = $tree_access_cacheability->merge(CacheableMetadata::createFromObject($element->access));
+
+      // Only render accessible links.
+      if (!$element->access->isAllowed()) {
+        continue;
+      }
+
+      $link = $element->link;
+      $block['title'] = $link->getTitle();
+      $block['description'] = $link->getDescription();
+      $block['content'] = [
+        '#theme' => 'admin_block_content',
+        '#content' => $this->systemManager->getAdminBlock($link),
+      ];
+
+      if (!empty($block['content']['#content'])) {
+        $blocks[$key] = $block;
+      }
+    }
+
+    if ($blocks) {
+      ksort($blocks);
+      $build = [
+        '#theme' => 'admin_page',
+        '#blocks' => $blocks,
+      ];
+      $tree_access_cacheability->applyTo($build);
+      return $build;
+    }
+    else {
+      $build = [
+        '#markup' => $this->t('You do not have any administrative items.'),
+      ];
+      $tree_access_cacheability->applyTo($build);
+      return $build;
+    }
+  }
+
+  /**
+   * Sets whether the admin menu is in compact mode or not.
+   *
+   * @param string $mode
+   *   Valid values are 'on' and 'off'.
+   *
+   * @return \Symfony\Component\HttpFoundation\RedirectResponse
+   */
+  public function compactPage($mode) {
+    user_cookie_save(['admin_compact_mode' => ($mode == 'on')]);
+    return $this->redirect('<front>');
+  }
+
+  /**
+   * Provides a single block from the administration menu as a page.
+   */
+  public function systemAdminMenuBlockPage() {
+    return $this->systemManager->getBlockContents();
+  }
+
+  /**
+   * Returns a theme listing.
+   *
+   * @return string
+   *   An HTML string of the theme listing page.
+   *
+   * @todo Move into ThemeController.
+   */
+  public function themesPage() {
+    $config = $this->config('system.theme');
+    // Get all available themes.
+    $themes = $this->themeHandler->rebuildThemeData();
+    uasort($themes, 'system_sort_modules_by_info_name');
+
+    $theme_default = $config->get('default');
+    $theme_groups = ['installed' => [], 'uninstalled' => []];
+    $admin_theme = $config->get('admin');
+    $admin_theme_options = [];
+
+    foreach ($themes as &$theme) {
+      if (!empty($theme->info['hidden'])) {
+        continue;
+      }
+      $theme->is_default = ($theme->getName() == $theme_default);
+      $theme->is_admin = ($theme->getName() == $admin_theme || ($theme->is_default && $admin_theme == '0'));
+
+      // Identify theme screenshot.
+      $theme->screenshot = NULL;
+      // Create a list which includes the current theme and all its base themes.
+      if (isset($themes[$theme->getName()]->base_themes)) {
+        $theme_keys = array_keys($themes[$theme->getName()]->base_themes);
+        $theme_keys[] = $theme->getName();
+      }
+      else {
+        $theme_keys = [$theme->getName()];
+      }
+      // Look for a screenshot in the current theme or in its closest ancestor.
+      foreach (array_reverse($theme_keys) as $theme_key) {
+        if (isset($themes[$theme_key]) && file_exists($themes[$theme_key]->info['screenshot'])) {
+          $theme->screenshot = [
+            'uri' => $themes[$theme_key]->info['screenshot'],
+            'alt' => $this->t('Screenshot for @theme theme', ['@theme' => $theme->info['name']]),
+            'title' => $this->t('Screenshot for @theme theme', ['@theme' => $theme->info['name']]),
+            'attributes' => ['class' => ['screenshot']],
+          ];
+          break;
+        }
+      }
+
+      if (empty($theme->status)) {
+        // Ensure this theme is compatible with this version of core.
+        $theme->incompatible_core = !isset($theme->info['core']) || ($theme->info['core'] != \DRUPAL::CORE_COMPATIBILITY);
+        // Require the 'content' region to make sure the main page
+        // content has a common place in all themes.
+        $theme->incompatible_region = !isset($theme->info['regions']['content']);
+        $theme->incompatible_php = version_compare(phpversion(), $theme->info['php']) < 0;
+        // Confirm that all base themes are available.
+        $theme->incompatible_base = (isset($theme->info['base theme']) && !($theme->base_themes === array_filter($theme->base_themes)));
+        // Confirm that the theme engine is available.
+        $theme->incompatible_engine = isset($theme->info['engine']) && !isset($theme->owner);
+      }
+      $theme->operations = [];
+      if (!empty($theme->status) || !$theme->incompatible_core && !$theme->incompatible_php && !$theme->incompatible_base && !$theme->incompatible_engine) {
+        // Create the operations links.
+        $query['theme'] = $theme->getName();
+        if ($this->themeAccess->checkAccess($theme->getName())) {
+          $theme->operations[] = [
+            'title' => $this->t('Settings'),
+            'url' => Url::fromRoute('system.theme_settings_theme', ['theme' => $theme->getName()]),
+            'attributes' => ['title' => $this->t('Settings for @theme theme', ['@theme' => $theme->info['name']])],
+          ];
+        }
+        if (!empty($theme->status)) {
+          if (!$theme->is_default) {
+            $theme_uninstallable = TRUE;
+            if ($theme->getName() == $admin_theme) {
+              $theme_uninstallable = FALSE;
+            }
+            // Check it isn't the base of theme of an installed theme.
+            foreach ($theme->required_by as $themename => $dependency) {
+              if (!empty($themes[$themename]->status)) {
+                $theme_uninstallable = FALSE;
+              }
+            }
+            if ($theme_uninstallable) {
+              $theme->operations[] = [
+                'title' => $this->t('Uninstall'),
+                'url' => Url::fromRoute('system.theme_uninstall'),
+                'query' => $query,
+                'attributes' => ['title' => $this->t('Uninstall @theme theme', ['@theme' => $theme->info['name']])],
+              ];
+            }
+            $theme->operations[] = [
+              'title' => $this->t('Set as default'),
+              'url' => Url::fromRoute('system.theme_set_default'),
+              'query' => $query,
+              'attributes' => ['title' => $this->t('Set @theme as default theme', ['@theme' => $theme->info['name']])],
+            ];
+          }
+          $admin_theme_options[$theme->getName()] = $theme->info['name'];
+        }
+        else {
+          $theme->operations[] = [
+            'title' => $this->t('Install'),
+            'url' => Url::fromRoute('system.theme_install'),
+            'query' => $query,
+            'attributes' => ['title' => $this->t('Install @theme theme', ['@theme' => $theme->info['name']])],
+          ];
+          $theme->operations[] = [
+            'title' => $this->t('Install and set as default'),
+            'url' => Url::fromRoute('system.theme_set_default'),
+            'query' => $query,
+            'attributes' => ['title' => $this->t('Install @theme as default theme', ['@theme' => $theme->info['name']])],
+          ];
+        }
+      }
+
+      // Add notes to default and administration theme.
+      $theme->notes = [];
+      if ($theme->is_default) {
+        $theme->notes[] = $this->t('default theme');
+      }
+      if ($theme->is_admin) {
+        $theme->notes[] = $this->t('administration theme');
+      }
+
+      // Sort installed and uninstalled themes into their own groups.
+      $theme_groups[$theme->status ? 'installed' : 'uninstalled'][] = $theme;
+    }
+
+    // There are two possible theme groups.
+    $theme_group_titles = [
+      'installed' => $this->formatPlural(count($theme_groups['installed']), 'Installed theme', 'Installed themes'),
+    ];
+    if (!empty($theme_groups['uninstalled'])) {
+      $theme_group_titles['uninstalled'] = $this->formatPlural(count($theme_groups['uninstalled']), 'Uninstalled theme', 'Uninstalled themes');
+    }
+
+    uasort($theme_groups['installed'], 'system_sort_themes');
+    $this->moduleHandler()->alter('system_themes_page', $theme_groups);
+
+    $build = [];
+    $build[] = [
+      '#theme' => 'system_themes_page',
+      '#theme_groups' => $theme_groups,
+      '#theme_group_titles' => $theme_group_titles,
+    ];
+    $build[] = $this->formBuilder->getForm('Drupal\system\Form\ThemeAdminForm', $admin_theme_options);
+
+    return $build;
+  }
+
+}
--- a/2017/web/core/modules/system/src/Controller/SystemInfoController.php
+++ b/2017/web/core/modules/system/src/Controller/SystemInfoController.php
@ -0,0 +1,71 @@
+<?php
+
+namespace Drupal\system\Controller;
+
+use Symfony\Component\DependencyInjection\ContainerInterface;
+use Symfony\Component\HttpFoundation\Response;
+use Drupal\Core\DependencyInjection\ContainerInjectionInterface;
+use Drupal\system\SystemManager;
+
+/**
+ * Returns responses for System Info routes.
+ */
+class SystemInfoController implements ContainerInjectionInterface {
+
+  /**
+   * System Manager Service.
+   *
+   * @var \Drupal\system\SystemManager
+   */
+  protected $systemManager;
+
+  /**
+   * {@inheritdoc}
+   */
+  public static function create(ContainerInterface $container) {
+    return new static(
+      $container->get('system.manager')
+    );
+  }
+
+  /**
+   * Constructs a SystemInfoController object.
+   *
+   * @param \Drupal\system\SystemManager $systemManager
+   *   System manager service.
+   */
+  public function __construct(SystemManager $systemManager) {
+    $this->systemManager = $systemManager;
+  }
+
+  /**
+   * Displays the site status report.
+   *
+   * @return array
+   *   A render array containing a list of system requirements for the Drupal
+   *   installation and whether this installation meets the requirements.
+   */
+  public function status() {
+    $requirements = $this->systemManager->listRequirements();
+    return ['#type' => 'status_report_page', '#requirements' => $requirements];
+  }
+
+  /**
+   * Returns the contents of phpinfo().
+   *
+   * @return \Symfony\Component\HttpFoundation\Response
+   *   A response object to be sent to the client.
+   */
+  public function php() {
+    if (function_exists('phpinfo')) {
+      ob_start();
+      phpinfo();
+      $output = ob_get_clean();
+    }
+    else {
+      $output = t('The phpinfo() function has been disabled for security reasons. For more information, visit <a href=":phpinfo">Enabling and disabling phpinfo()</a> handbook page.', [':phpinfo' => 'https://www.drupal.org/node/243993']);
+    }
+    return new Response($output);
+  }
+
+}
--- a/2017/web/core/modules/system/src/Controller/ThemeController.php
+++ b/2017/web/core/modules/system/src/Controller/ThemeController.php
@ -0,0 +1,193 @@
+<?php
+
+namespace Drupal\system\Controller;
+
+use Drupal\Core\Config\ConfigFactoryInterface;
+use Drupal\Core\Config\PreExistingConfigException;
+use Drupal\Core\Config\UnmetDependenciesException;
+use Drupal\Core\Controller\ControllerBase;
+use Drupal\Core\Extension\ThemeHandlerInterface;
+use Symfony\Component\DependencyInjection\ContainerInterface;
+use Symfony\Component\HttpFoundation\Request;
+use Symfony\Component\HttpKernel\Exception\AccessDeniedHttpException;
+
+/**
+ * Controller for theme handling.
+ */
+class ThemeController extends ControllerBase {
+
+  /**
+   * The theme handler service.
+   *
+   * @var \Drupal\Core\Extension\ThemeHandlerInterface
+   */
+  protected $themeHandler;
+
+  /**
+   * Constructs a new ThemeController.
+   *
+   * @param \Drupal\Core\Extension\ThemeHandlerInterface $theme_handler
+   *   The theme handler.
+   * @param \Drupal\Core\Config\ConfigFactoryInterface $config_factory
+   *   The config factory.
+   */
+  public function __construct(ThemeHandlerInterface $theme_handler, ConfigFactoryInterface $config_factory) {
+    $this->themeHandler = $theme_handler;
+    $this->configFactory = $config_factory;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public static function create(ContainerInterface $container) {
+    return new static(
+      $container->get('theme_handler'),
+      $container->get('config.factory')
+    );
+  }
+
+  /**
+   * Uninstalls a theme.
+   *
+   * @param \Symfony\Component\HttpFoundation\Request $request
+   *   A request object containing a theme name and a valid token.
+   *
+   * @return \Symfony\Component\HttpFoundation\RedirectResponse
+   *   Redirects back to the appearance admin page.
+   *
+   * @throws \Symfony\Component\HttpKernel\Exception\AccessDeniedHttpException
+   *   Throws access denied when no theme or token is set in the request or when
+   *   the token is invalid.
+   */
+  public function uninstall(Request $request) {
+    $theme = $request->query->get('theme');
+    $config = $this->config('system.theme');
+
+    if (isset($theme)) {
+      // Get current list of themes.
+      $themes = $this->themeHandler->listInfo();
+
+      // Check if the specified theme is one recognized by the system.
+      if (!empty($themes[$theme])) {
+        // Do not uninstall the default or admin theme.
+        if ($theme === $config->get('default') || $theme === $config->get('admin')) {
+          $this->messenger()->addError($this->t('%theme is the default theme and cannot be uninstalled.', ['%theme' => $themes[$theme]->info['name']]));
+        }
+        else {
+          $this->themeHandler->uninstall([$theme]);
+          $this->messenger()->addStatus($this->t('The %theme theme has been uninstalled.', ['%theme' => $themes[$theme]->info['name']]));
+        }
+      }
+      else {
+        $this->messenger()->addError($this->t('The %theme theme was not found.', ['%theme' => $theme]));
+      }
+
+      return $this->redirect('system.themes_page');
+    }
+
+    throw new AccessDeniedHttpException();
+  }
+
+  /**
+   * Installs a theme.
+   *
+   * @param \Symfony\Component\HttpFoundation\Request $request
+   *   A request object containing a theme name and a valid token.
+   *
+   * @return \Symfony\Component\HttpFoundation\RedirectResponse
+   *   Redirects back to the appearance admin page.
+   *
+   * @throws \Symfony\Component\HttpKernel\Exception\AccessDeniedHttpException
+   *   Throws access denied when no theme or token is set in the request or when
+   *   the token is invalid.
+   */
+  public function install(Request $request) {
+    $theme = $request->query->get('theme');
+
+    if (isset($theme)) {
+      try {
+        if ($this->themeHandler->install([$theme])) {
+          $themes = $this->themeHandler->listInfo();
+          $this->messenger()->addStatus($this->t('The %theme theme has been installed.', ['%theme' => $themes[$theme]->info['name']]));
+        }
+        else {
+          $this->messenger()->addError($this->t('The %theme theme was not found.', ['%theme' => $theme]));
+        }
+      }
+      catch (PreExistingConfigException $e) {
+        $config_objects = $e->flattenConfigObjects($e->getConfigObjects());
+        $this->messenger()->addError(
+          $this->formatPlural(
+            count($config_objects),
+            'Unable to install @extension, %config_names already exists in active configuration.',
+            'Unable to install @extension, %config_names already exist in active configuration.',
+            [
+              '%config_names' => implode(', ', $config_objects),
+              '@extension' => $theme,
+            ])
+        );
+      }
+      catch (UnmetDependenciesException $e) {
+        $this->messenger()->addError($e->getTranslatedMessage($this->getStringTranslation(), $theme));
+      }
+
+      return $this->redirect('system.themes_page');
+    }
+
+    throw new AccessDeniedHttpException();
+  }
+
+  /**
+   * Set the default theme.
+   *
+   * @param \Symfony\Component\HttpFoundation\Request $request
+   *   A request object containing a theme name.
+   *
+   * @return \Symfony\Component\HttpFoundation\RedirectResponse
+   *   Redirects back to the appearance admin page.
+   *
+   * @throws \Symfony\Component\HttpKernel\Exception\AccessDeniedHttpException
+   *   Throws access denied when no theme is set in the request.
+   */
+  public function setDefaultTheme(Request $request) {
+    $config = $this->configFactory->getEditable('system.theme');
+    $theme = $request->query->get('theme');
+
+    if (isset($theme)) {
+      // Get current list of themes.
+      $themes = $this->themeHandler->listInfo();
+
+      // Check if the specified theme is one recognized by the system.
+      // Or try to install the theme.
+      if (isset($themes[$theme]) || $this->themeHandler->install([$theme])) {
+        $themes = $this->themeHandler->listInfo();
+
+        // Set the default theme.
+        $config->set('default', $theme)->save();
+
+        // The status message depends on whether an admin theme is currently in
+        // use: a value of 0 means the admin theme is set to be the default
+        // theme.
+        $admin_theme = $config->get('admin');
+        if ($admin_theme != 0 && $admin_theme != $theme) {
+          $this->messenger()
+            ->addStatus($this->t('Please note that the administration theme is still set to the %admin_theme theme; consequently, the theme on this page remains unchanged. All non-administrative sections of the site, however, will show the selected %selected_theme theme by default.', [
+              '%admin_theme' => $themes[$admin_theme]->info['name'],
+              '%selected_theme' => $themes[$theme]->info['name'],
+            ]));
+        }
+        else {
+          $this->messenger()->addStatus($this->t('%theme is now the default theme.', ['%theme' => $themes[$theme]->info['name']]));
+        }
+      }
+      else {
+        $this->messenger()->addError($this->t('The %theme theme was not found.', ['%theme' => $theme]));
+      }
+
+      return $this->redirect('system.themes_page');
+
+    }
+    throw new AccessDeniedHttpException();
+  }
+
+}
--- a/2017/web/core/modules/system/src/Controller/TimezoneController.php
+++ b/2017/web/core/modules/system/src/Controller/TimezoneController.php
@ -0,0 +1,38 @@
+<?php
+
+namespace Drupal\system\Controller;
+
+use Symfony\Component\HttpFoundation\JsonResponse;
+
+/**
+ * Provides a callback for finding out a timezone name.
+ */
+class TimezoneController {
+
+  /**
+   * Retrieve a JSON object containing a time zone name given a timezone
+   * abbreviation.
+   *
+   * @param string $abbreviation
+   *   Time zone abbreviation.
+   * @param int $offset
+   *   Offset from GMT in seconds. Defaults to -1 which means that first found
+   *   time zone corresponding to abbr is returned. Otherwise exact offset is
+   *   searched and only if not found then the first time zone with any offset
+   *   is returned.
+   * @param null|bool $is_daylight_saving_time
+   *   Daylight saving time indicator. If abbr does not exist then the time
+   *   zone is searched solely by offset and isdst.
+   *
+   * @return \Symfony\Component\HttpFoundation\JsonResponse
+   *   The timezone name in JsonResponse object.
+   */
+  public function getTimezone($abbreviation = '', $offset = -1, $is_daylight_saving_time = NULL) {
+    // An abbreviation of "0" passed in the callback arguments should be
+    // interpreted as the empty string.
+    $abbreviation = $abbreviation ? $abbreviation : '';
+    $timezone = timezone_name_from_abbr($abbreviation, intval($offset), $is_daylight_saving_time);
+    return new JsonResponse($timezone);
+  }
+
+}
--- a/2017/web/core/modules/system/src/CronController.php
+++ b/2017/web/core/modules/system/src/CronController.php
@ -0,0 +1,69 @@
+<?php
+
+namespace Drupal\system;
+
+use Drupal\Core\Controller\ControllerBase;
+use Drupal\Core\CronInterface;
+use Symfony\Component\DependencyInjection\ContainerInterface;
+use Symfony\Component\HttpFoundation\Response;
+
+/**
+ * Controller for Cron handling.
+ */
+class CronController extends ControllerBase {
+
+  /**
+   * The cron service.
+   *
+   * @var \Drupal\Core\CronInterface
+   */
+  protected $cron;
+
+  /**
+   * Constructs a CronController object.
+   *
+   * @param \Drupal\Core\CronInterface $cron
+   *   The cron service.
+   */
+  public function __construct(CronInterface $cron) {
+    $this->cron = $cron;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public static function create(ContainerInterface $container) {
+    return new static($container->get('cron'));
+  }
+
+  /**
+   * Run Cron once.
+   *
+   * @return \Symfony\Component\HttpFoundation\Response
+   *   A Symfony response object.
+   */
+  public function run() {
+    $this->cron->run();
+
+    // HTTP 204 is "No content", meaning "I did what you asked and we're done."
+    return new Response('', 204);
+  }
+
+  /**
+   * Run cron manually.
+   *
+   * @return \Symfony\Component\HttpFoundation\RedirectResponse
+   *   A Symfony direct response object.
+   */
+  public function runManually() {
+    if ($this->cron->run()) {
+      $this->messenger()->addStatus($this->t('Cron ran successfully.'));
+    }
+    else {
+      $this->messenger()->addError($this->t('Cron run failed.'));
+    }
+
+    return $this->redirect('system.status');
+  }
+
+}
--- a/2017/web/core/modules/system/src/DateFormatAccessControlHandler.php
+++ b/2017/web/core/modules/system/src/DateFormatAccessControlHandler.php
@ -0,0 +1,43 @@
+<?php
+
+namespace Drupal\system;
+
+use Drupal\Core\Access\AccessResult;
+use Drupal\Core\Entity\EntityAccessControlHandler;
+use Drupal\Core\Entity\EntityInterface;
+use Drupal\Core\Session\AccountInterface;
+
+/**
+ * Defines the access control handler for the date format entity type.
+ *
+ * @see \Drupal\system\Entity\DateFormat
+ */
+class DateFormatAccessControlHandler extends EntityAccessControlHandler {
+
+  /**
+   * {@inheritdoc}
+   */
+  protected $viewLabelOperation = TRUE;
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function checkAccess(EntityInterface $entity, $operation, AccountInterface $account) {
+    // There are no restrictions on viewing the label of a date format.
+    if ($operation === 'view label') {
+      return AccessResult::allowed();
+    }
+    // Locked date formats cannot be updated or deleted.
+    elseif (in_array($operation, ['update', 'delete'])) {
+      if ($entity->isLocked()) {
+        return AccessResult::forbidden('The DateFormat config entity is locked.')->addCacheableDependency($entity);
+      }
+      else {
+        return parent::checkAccess($entity, $operation, $account)->addCacheableDependency($entity);
+      }
+    }
+
+    return parent::checkAccess($entity, $operation, $account);
+  }
+
+}
--- a/Show more
+++ b/Show more