Cleanup GitHub Pages #393
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| name: Cleanup GitHub Pages | |
| on: | |
| schedule: | |
| # Runs daily at 1AM UTC which is 6PM pacific | |
| - cron: '0 1 * * *' | |
| workflow_dispatch: | |
| inputs: | |
| stale_threshold: | |
| description: 'Threshold after which the preview build is considered to be stale' | |
| default: '2 weeks' | |
| type: string | |
| jobs: | |
| remove_stale_previews: | |
| runs-on: ubuntu-latest | |
| steps: | |
| - name: Checkout code | |
| uses: actions/checkout@v4 | |
| with: | |
| ref: 'gh-pages' | |
| fetch-depth: 0 | |
| - name: Determine Previews to Delete | |
| id: find_previews | |
| run: | | |
| # Get the stale threshold from the workflow parameter | |
| # and calculate the timestamp for the threshold | |
| STALE_THRESHOLD="${{ github.event.inputs.stale_threshold || '2 weeks' }}" | |
| THRESHOLD_DATE=$(date --date="$STALE_THRESHOLD ago" +%s) | |
| # Find and collect previews older than the specified threshold, skipping "main" and ".git" | |
| STALE_PREVIEWS=() | |
| for dir in $(find . -type d -mindepth 1 -maxdepth 1); do | |
| # Check if the preview name is "main" or ".git" and skip it | |
| if [ "$(basename "$dir")" == "main" ] || [ "$(basename "$dir")" == ".git" ]; then | |
| continue | |
| fi | |
| DIR_DATE=$(git log -1 --format="%ct" -- "$dir") | |
| if [ -n "$DIR_DATE" ] && [ "$DIR_DATE" -lt "$THRESHOLD_DATE" ]; then | |
| STALE_PREVIEWS+=("$(basename "$dir")") | |
| fi | |
| done | |
| if [ -z "${STALE_PREVIEWS[*]}" ]; then | |
| echo "Did not find any stale previews based on $STALE_THRESHOLD threshold. Done." | |
| else | |
| echo "Previews determined to be stale based on $STALE_THRESHOLD threshold: ${STALE_PREVIEWS[*]}" | |
| fi | |
| # Set the list of previews to be removed as an output | |
| echo "previews_to_delete=${STALE_PREVIEWS[*]}" >> $GITHUB_OUTPUT | |
| - name: Notify Open Pull Requests of Preview Removal | |
| if: ${{ steps.find_previews.outputs.previews_to_delete != '' }} | |
| run: | | |
| # Notify open pull requests of their preview being deleted | |
| # but don't fail on this step for any reason | |
| set +e | |
| STALE_PREVIEWS=(${{ steps.find_previews.outputs.previews_to_delete }}) | |
| STALE_THRESHOLD="${{ github.event.inputs.stale_threshold || '2 weeks' }}" | |
| # Iterate through the previews and look for open PRs | |
| for dir in "${STALE_PREVIEWS[@]}"; do | |
| if [ -f "$dir/.github_source_repository" ]; then | |
| # Get the source repository for the preview build | |
| SOURCE_REPO=$(cat "$dir/.github_source_repository") | |
| echo "Source repository for $dir is $SOURCE_REPO" | |
| else | |
| # Without .github_source_repository we don't know where to post the comment so we'll skip | |
| echo "Could not determine source repository for $dir. Skipping." | |
| continue | |
| fi | |
| # Check if there are open pull requests for the source repository | |
| OPEN_PRS=$(curl -s -H "Authorization: token $GITHUB_TOKEN" "https://api.github.com/repos/$SOURCE_REPO/pulls?state=open") | |
| # Check if any open pull requests match the preview branch name | |
| PREVIEW_PRS=$(echo $OPEN_PRS | jq -r --arg dir "$dir" '.[] | select(.head.ref == $dir) | .number' 2>/dev/null) | |
| if [[ -n "$PREVIEW_PRS" ]]; then | |
| # Comment on the open PRs | |
| for pr_number in $PREVIEW_PRS; do | |
| COMMENT_BODY="The preview build for this pull request has been cleaned up due to being stale.\n\nPreview builds that were $STALE_THRESHOLD old or older were automatically removed to maintain a tidy GitHub Pages site.\n\nYou can rebuild the preview at any time by pushing a new commit to this pull request:\n\n\`\`\`\ngit checkout $dir\ngit commit --allow-empty -m 'rebuild preview'\ngit push origin $dir\n\`\`\`" | |
| curl -X POST -d "{\"body\":\"$COMMENT_BODY\"}" -H "Authorization: token $GITHUB_TOKEN" "https://api.github.com/repos/$SOURCE_REPO/issues/$pr_number/comments" | |
| done | |
| else | |
| echo "No open pull requests for $dir. No notification needed." | |
| fi | |
| done | |
| env: | |
| GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }} | |
| - name: Remove Previews and Push to GitHub Pages | |
| if: ${{ steps.find_previews.outputs.previews_to_delete != '' }} | |
| run: | | |
| # Get the list of directories to delete from the previous step's output | |
| STALE_PREVIEWS=(${{ steps.find_previews.outputs.previews_to_delete }}) | |
| # Get the stale threshold from the workflow parameter | |
| # and calculate the timestamp for the threshold | |
| STALE_THRESHOLD="${{ github.event.inputs.stale_threshold || '2 weeks' }}" | |
| echo "Removing stale previews based on $STALE_THRESHOLD threshold: ${STALE_PREVIEWS[*]}" | |
| # Remove the directories and their contents | |
| for dir in "${STALE_PREVIEWS[@]}"; do | |
| rm -rf "$dir" | |
| done | |
| # Commit and push the changes | |
| git add . | |
| if [[ `git status --porcelain` ]]; then | |
| git config user.name 'github-actions[bot]' | |
| git config user.email 'github-actions[bot]@users.noreply.github.com' | |
| git commit -m "Removed previews older than $STALE_THRESHOLD via ${{ github.event_name }} by ${{ github.actor }}" | |
| git push origin gh-pages | |
| else | |
| echo "No previews were deleted." | |
| fi |