Add create-daily task

run

@@ -7,6 +7,50 @@ function clean {
   rm -fr output_*/ source/build/
 }
 
+# Create a new daily email.
+function create-daily {
+  local date="${1}"
+  local title="${2}"
+
+  if [ "${date}" == "next" ]; then
+    next_date=$(ls -1 source/_daily_emails | tail -n 1 | tr -d '.md' | xargs -I {} date +%Y-%m-%d -d '{} +1 day')
+  else
+    next_date="${date}"
+  fi
+
+  filepath="source/_daily_emails/${next_date}.md"
+
+  shift 1
+
+  # Generate the title and slug.
+  title="${*}"
+  slug=$(echo "${title}" | \
+    tr '[:upper:]' '[:lower:]' | \
+    sed 's/[^a-z0-9]/-/g' | \
+    sed 's/\-\-+/-/g' | \
+    sed 's/^\-//;s/\-$//')
+
+  # Create the file.
+  cp -f --no-clobber stub.md "${filepath}"
+
+  date=$(date -d "${next_date}" +%Y-%m-%d)
+  day=$(date -d "${next_date}" +%d)
+  month=$(date -d "${next_date}" +%m)
+  year=$(date -d "${next_date}" +%Y)
+
+  # Replace the placeholders.
+  sed -i "s/{{ date }}/${date}/" "${filepath}"
+  sed -i "s/{{ title }}/${title}/" "${filepath}"
+  sed -i "s#{{ permalink }}#archive/${year}/${month}/${day}/${slug}#" "${filepath}"
+
+  # Create a commit with the appropriate date in the message
+  git add "${filepath}"
+  git commit --quiet -m "Add daily email for ${date}
+
+${title}"
+
+  echo "${filepath}"
+}
 function generate {
   local args=()
 

stub.md

@@ -0,0 +1,11 @@
+---
+title: >-
+  {{ title }}
+date: {{ date }}
+permalink: {{ permalink }}
+snippet: |
+  TODO
+# tags:
+#   - a
+#   - b
+---