potential-redirects-or-partials.yml

name: Potential redirects or partials

# **What it does**: Adds or removes a comment if a PR renames or removes a file.
# **Why we have it**: Highlights when we need redirects covering certain file paths.
# **Who does it impact**: PCX team, other Cloudflare contributors

on:
  pull_request:
    branches:
      - production

concurrency:
  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
  cancel-in-progress: true

jobs:
  flag_changed_filenames:
    permissions:
      pull-requests: write
    runs-on: ubuntu-latest
    steps:
      - name: Checkout Repository
        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6

      - name: Potential redirects
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
          REPO: ${{ github.repository }}
          PR_NUMBER: ${{ github.event.pull_request.number }}
        run: |
          files=$(curl -s -H "Authorization: Bearer $GITHUB_TOKEN" \
            -H "Accept: application/vnd.github.v3+json" \
            "https://api.github.com/repos/$REPO/pulls/$PR_NUMBER/files?per_page=100" | \
            jq -r '.[] | select(.status=="renamed" or .status=="removed") | select (.filename | startswith("src/content/docs")) | select(.filename | endswith(".mdx")) | if .status == "renamed" then .previous_filename else .filename end' | \
            sed -e 's|^src/content/docs||' -e 's|/index\.mdx$|/|' -e 's|\.mdx$|/|')
          # Use random delimiter for security reasons
          delimiter="$(openssl rand -hex 8)"
          echo "CHANGED_FILES<<${delimiter}" >> "$GITHUB_ENV"
          echo "${files}" >> "$GITHUB_ENV"
          echo "${delimiter}" >> "$GITHUB_ENV"

      - name: Updated partial files
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
          REPO: ${{ github.repository }}
          PR_NUMBER: ${{ github.event.pull_request.number }}
        run: |
          files=$(curl -s -H "Authorization: Bearer $GITHUB_TOKEN" \
            -H "Accept: application/vnd.github.v3+json" \
            "https://api.github.com/repos/$REPO/pulls/$PR_NUMBER/files?per_page=100" | \
            jq -r '.[] | select(.status=="modified") | select (.filename | startswith("src/content/partials")) | select(.filename | endswith(".mdx")) | .filename' | \
            sed -e 's|^src/content/partials||' -e 's|\.mdx$|/|')
          # Use random delimiter for security reasons
          delimiter="$(openssl rand -hex 8)"
          echo "PARTIAL_FILES<<${delimiter}" >> "$GITHUB_ENV"
          echo "${files}" >> "$GITHUB_ENV"
          echo "${delimiter}" >> "$GITHUB_ENV"

      - name: Comment or Update Comment on PR based on changed files
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          # If there are no changed files
          if [ -z "$CHANGED_FILES" ] && [ -z "$PARTIAL_FILES" ]; then
            # Fetch the ID of the existing comment, if it exists
            existing_comment_id=$(curl -s -H "Authorization: Bearer $GITHUB_TOKEN" \
              -H "Accept: application/vnd.github.v3+json" \
              "https://api.github.com/repos/${{ github.repository }}/issues/${{ github.event.pull_request.number }}/comments" | \
              jq '.[] | select(.user.id == 41898282) | select(.body | contains("This PR requires additional review attention because it affects the following areas")) | .id')

            # If the comment exists, delete it
            if [ ! -z "$existing_comment_id" ]; then
              curl -s -H "Authorization: Bearer $GITHUB_TOKEN" \
                -H "Accept: application/vnd.github.v3+json" \
                -X DELETE \
                "https://api.github.com/repos/${{ github.repository }}/issues/comments/$existing_comment_id"
            fi
          else
            # Construct the comment body for changed files
            comment_body="This PR requires additional review attention because it affects the following areas:"

            # Add CHANGED_FILES logic
            if [ -n "$CHANGED_FILES" ]; then
              comment_body="$comment_body

            ### Redirects
            This PR changes current filenames or deletes current files. Make sure you have [redirects](https://developers.cloudflare.com/pages/configuration/redirects/) set up to cover the following paths:"
              while IFS= read -r path; do
                [ -z "$path" ] && continue
                clean_path=$(echo "$path" | sed 's/"//g') # Remove quotation marks
                comment_body="$comment_body
            - [ ] \`$clean_path\`"
              done <<< "$CHANGED_FILES"
            fi

            # Conditional bit for PARTIAL_FILES
            if [ -n "$PARTIAL_FILES" ]; then
              comment_body="$comment_body

            ### Partials
            This PR updates partial files, which are pieces of content used across multiple files in our [Render component](https://developers.cloudflare.com/style-guide/components/render/)."
              while IFS= read -r path; do
                [ -z "$path" ] && continue
                updated_path=$(echo "$path" | sed -e 's/"//g' -e 's/^\///' -e 's/\/$//')
                comment_body="$comment_body
            - [ ] \`$updated_path\` - [view affected files](https://developers.cloudflare.com/style-guide/components/render/?partial=$updated_path)"
              done <<< "$PARTIAL_FILES"
            fi

            # Check if a comment already exists
            existing_comment_id=$(curl -s -H "Authorization: Bearer $GITHUB_TOKEN" \
              -H "Accept: application/vnd.github.v3+json" \
              "https://api.github.com/repos/${{ github.repository }}/issues/${{ github.event.pull_request.number }}/comments" | \
              jq '.[] | select(.user.id == 41898282) | select(.body | contains("This PR requires additional review attention because it affects the following areas")) | .id')

            comment_payload=$(echo '{}' | jq --arg body "$comment_body" '.body = $body')

            # If a comment exists, update it. Otherwise, post a new comment.
            if [ ! -z "$existing_comment_id" ]; then
              curl -s -H "Authorization: Bearer $GITHUB_TOKEN" \
                -H "Accept: application/vnd.github.v3+json" \
                -X PATCH -d "$comment_payload" \
                "https://api.github.com/repos/${{ github.repository }}/issues/comments/$existing_comment_id"
            else
              curl -s -H "Authorization: Bearer $GITHUB_TOKEN" \
                -H "Accept: application/vnd.github.v3+json" \
                -X POST -d "$comment_payload" \
                "https://api.github.com/repos/${{ github.repository }}/issues/${{ github.event.pull_request.number }}/comments"
            fi
          fi