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CompareScreenshotComment.yml
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name: Screenshot compare comment
on:
workflow_run:
workflows:
- CompareScreenshot
types:
- completed
concurrency:
group: ${{ github.workflow }}-${{ github.head_ref }}-${{ github.event.workflow_run.id }}
cancel-in-progress: true
permissions: { }
jobs:
Comment-CompareScreenshot:
if: >
github.event.workflow_run.event == 'pull_request' &&
github.event.workflow_run.conclusion == 'success'
timeout-minutes: 2
permissions:
actions: read # for downloading artifacts
contents: write # for pushing screenshot-diff to companion branch
pull-requests: write # for creating a comment on pull requests
runs-on: ubuntu-latest
steps:
- uses: dawidd6/action-download-artifact@v7
with:
name: pr
run_id: ${{ github.event.workflow_run.id }}
- id: get-pull-request-number
name: Get pull request number
shell: bash
run: |
echo "pull_request_number=$(cat NR)" >> "$GITHUB_OUTPUT"
- name: main checkout
id: checkout-main
uses: actions/checkout@v4
with:
ref: ${{ github.event.workflow_run.event == 'pull_request' && github.event.workflow_run.event.pull_request.base.ref || github.event.repository.default_branch }}
- id: switch-companion-branch
env:
BRANCH_NAME: companion_${{ github.event.workflow_run.head_branch }}
run: |
# orphan means it will create no history branch
git branch -D "$BRANCH_NAME" || true
git checkout --orphan "$BRANCH_NAME"
git rm -rf .
- uses: dawidd6/action-download-artifact@v7
with:
run_id: ${{ github.event.workflow_run.id }}
name: screenshot-diff
path: screenshot-diff
- id: check-if-there-are-valid-files
name: Check if there are valid files
shell: bash
run: |
# Find all the files ending with _compare.png
mapfile -t files_to_add < <(find . -type f -name "*_compare.png")
# Check for invalid file names and add only valid ones
exist_valid_files="false"
for file in "${files_to_add[@]}"; do
if [[ $file =~ ^[a-zA-Z0-9_./-]+$ ]]; then
exist_valid_files="true"
break
fi
done
echo "exist_valid_files=$exist_valid_files" >> "$GITHUB_OUTPUT"
- id: push-screenshot-diff
shell: bash
if: steps.check-if-there-are-valid-files.outputs.exist_valid_files == 'true'
env:
BRANCH_NAME: companion_${{ github.event.workflow_run.head_branch }}
run: |
# Find all the files ending with _compare.png
files_to_add=$(find . -type f -name "*_compare.png")
# Check for invalid file names and add only valid ones
for file in $files_to_add; do
if [[ "$file" =~ ^[a-zA-Z0-9_./-]+$ ]]; then
git add "$file"
fi
done
git config --global user.name ScreenshotBot
git config --global user.email 41898282+github-actions[bot]@users.noreply.github.com
git commit -m "Add screenshot diff"
git push origin HEAD:"$BRANCH_NAME" -f
- id: generate-diff-reports
name: Generate diff reports
if: steps.check-if-there-are-valid-files.outputs.exist_valid_files == 'true'
env:
BRANCH_NAME: companion_${{ github.event.workflow_run.head_branch }}
shell: bash
run: |
# Find all the files ending with _compare.png in roborazzi folder
files=$(find . -type f -name "*_compare.png" | grep "roborazzi/" | grep -E "^[a-zA-Z0-9_./-]+$")
delimiter="$(openssl rand -hex 8)"
{
echo "reports<<${delimiter}"
# Create markdown table header
echo "Snapshot diff report vs base branch: ${{ github.event.workflow_run.event == 'pull_request' && github.event.workflow_run.event.pull_request.base.ref || github.event.repository.default_branch }}"
echo "| File name | Image |"
echo "|-------|-------|"
} >> "$GITHUB_OUTPUT"
# Iterate over the files and create table rows
for file in $files; do
# Get the file name and insert newlines every 20 characters
fileName=$(basename "$file" | sed -r 's/(.{20})/\1<br>/g')
echo "| [$fileName](https://github.com/${{ github.repository }}/blob/$BRANCH_NAME/$file) |  |" >> "$GITHUB_OUTPUT"
done
echo "${delimiter}" >> "$GITHUB_OUTPUT"
- name: Find Comment
uses: peter-evans/find-comment@v3
id: fc
if: steps.generate-diff-reports.outputs.reports != ''
with:
issue-number: ${{ steps.get-pull-request-number.outputs.pull_request_number }}
comment-author: 'github-actions[bot]'
body-includes: Snapshot diff report
- name: Add or update comment on PR
uses: peter-evans/create-or-update-comment@v4
if: steps.generate-diff-reports.outputs.reports != ''
with:
comment-id: ${{ steps.fc.outputs.comment-id }}
issue-number: ${{ steps.get-pull-request-number.outputs.pull_request_number }}
body: ${{ steps.generate-diff-reports.outputs.reports }}
edit-mode: replace
- name: Cleanup outdated companion branches
run: |
# Find outdated companion branches with last commit date
git branch -r --format="%(refname:lstrip=3)" | grep companion_ | while read -r branch; do
last_commit_date_timestamp=$(git log -1 --format=%ct "origin/$branch")
now_timestamp=$(date +%s)
# Delete branch if it's older than 1 month
# if [ $((now_timestamp - last_commit_date_timestamp)) -gt 2592000 ]; then
# For testing purpose, delete branch if it's older than 1 second
echo "branch: $branch now_timestamp: $now_timestamp last_commit_date_timestamp: $last_commit_date_timestamp"
if [ $((now_timestamp - last_commit_date_timestamp)) -gt 1 ]; then
# Comment out for demonstration purpose
echo "Deleting $branch"
# git push origin --delete "$branch"
fi
done