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web/core/modules/path/migrations/d6_url_alias.yml

@@ -0,0 +1,39 @@
+id: d6_url_alias
+label: URL aliases
+migration_tags:
+  - Drupal 6
+  - Content
+source:
+  plugin: d6_url_alias
+  constants:
+    slash: '/'
+process:
+  source:
+    plugin: concat
+    source:
+      - constants/slash
+      - src
+  alias:
+    plugin: concat
+    source:
+      - constants/slash
+      - dst
+  langcode:
+    plugin: d6_url_alias_language
+    source: language
+  node_translation:
+    -
+      plugin: explode
+      source: src
+      delimiter: /
+    -
+      # If the source path has no slashes return a dummy default value.
+      plugin: extract
+      default: 'INVALID_NID'
+      index:
+        - 1
+    -
+      plugin: migration_lookup
+      migration: d6_node_translation
+destination:
+  plugin: url_alias

web/core/modules/path/migrations/d7_url_alias.yml

@@ -0,0 +1,37 @@
+id: d7_url_alias
+label: URL aliases
+migration_tags:
+  - Drupal 7
+  - Content
+source:
+  plugin: d7_url_alias
+  constants:
+    slash: '/'
+process:
+  source:
+    plugin: concat
+    source:
+      - constants/slash
+      - source
+  alias:
+    plugin: concat
+    source:
+      - constants/slash
+      - alias
+  langcode: language
+  node_translation:
+    -
+      plugin: explode
+      source: source
+      delimiter: /
+    -
+      # If the source path has no slashes return a dummy default value.
+      plugin: extract
+      default: 'INVALID_NID'
+      index:
+        - 1
+    -
+      plugin: migration_lookup
+      migration: d7_node_translation
+destination:
+  plugin: url_alias