Files
ComfyUI_frontend/.github/workflows/pr-backport.yaml
Christian Byrne d1639c4377 [ci] extend backport workflow to work with arbitrary branches (#6108)
## Summary

Expands the PR backport workflow so maintainers can target any release
branch using labels, instead of being limited to the `core/x.y` release
lines. The workflow now collects labels formatted as plain version
numbers (`1.24`) as before, plus new prefixes like
`branch:release/hotfix` or `backport:partner/foo`, validates that each
referenced branch exists, and then cherry-picks the source merge commit
to every target.

All generated PRs and failure comments reference the actual branch name,
making it clear where the backport landed or why it failed. This keeps
the existing opt-in flow (`needs-backport`) but makes it flexible enough
for custom support and partner branches without extra manual work.

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-6108-ci-extend-backport-workflow-to-work-with-arbitrary-branches-28f6d73d365081bf85a3d4c40a23bb68)
by [Unito](https://www.unito.io)
2025-10-17 14:38:06 -07:00

290 lines
11 KiB
YAML

name: PR Backport
on:
pull_request_target:
types: [closed, labeled]
branches: [main]
workflow_dispatch:
inputs:
pr_number:
description: 'PR number to backport'
required: true
type: string
force_rerun:
description: 'Force rerun even if backports exist'
required: false
type: boolean
default: false
jobs:
backport:
if: >
(github.event_name == 'pull_request_target' &&
github.event.pull_request.merged == true &&
contains(github.event.pull_request.labels.*.name, 'needs-backport')) ||
github.event_name == 'workflow_dispatch'
runs-on: ubuntu-latest
permissions:
contents: write
pull-requests: write
issues: write
steps:
- name: Validate inputs for manual triggers
if: github.event_name == 'workflow_dispatch'
run: |
# Validate PR number format
if ! [[ "${{ inputs.pr_number }}" =~ ^[0-9]+$ ]]; then
echo "::error::Invalid PR number format. Must be a positive integer."
exit 1
fi
# Validate PR exists and is merged
if ! gh pr view "${{ inputs.pr_number }}" --json merged >/dev/null 2>&1; then
echo "::error::PR #${{ inputs.pr_number }} not found or inaccessible."
exit 1
fi
MERGED=$(gh pr view "${{ inputs.pr_number }}" --json merged --jq '.merged')
if [ "$MERGED" != "true" ]; then
echo "::error::PR #${{ inputs.pr_number }} is not merged. Only merged PRs can be backported."
exit 1
fi
# Validate PR has needs-backport label
if ! gh pr view "${{ inputs.pr_number }}" --json labels --jq '.labels[].name' | grep -q "needs-backport"; then
echo "::error::PR #${{ inputs.pr_number }} does not have 'needs-backport' label."
exit 1
fi
env:
GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
- name: Checkout repository
uses: actions/checkout@v5
with:
fetch-depth: 0
- name: Configure git
run: |
git config user.name "github-actions[bot]"
git config user.email "github-actions[bot]@users.noreply.github.com"
- name: Check if backports already exist
id: check-existing
env:
GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
PR_NUMBER: ${{ github.event_name == 'workflow_dispatch' && inputs.pr_number || github.event.pull_request.number }}
run: |
# Check for existing backport PRs for this PR number
EXISTING_BACKPORTS=$(gh pr list --state all --search "backport-${PR_NUMBER}-to" --json title,headRefName,baseRefName | jq -r '.[].headRefName')
if [ -z "$EXISTING_BACKPORTS" ]; then
echo "skip=false" >> $GITHUB_OUTPUT
exit 0
fi
# For manual triggers with force_rerun, proceed anyway
if [ "${{ github.event_name }}" = "workflow_dispatch" ] && [ "${{ inputs.force_rerun }}" = "true" ]; then
echo "skip=false" >> $GITHUB_OUTPUT
echo "::warning::Force rerun requested - existing backports will be updated"
exit 0
fi
echo "Found existing backport PRs:"
echo "$EXISTING_BACKPORTS"
echo "skip=true" >> $GITHUB_OUTPUT
echo "::warning::Backport PRs already exist for PR #${PR_NUMBER}, skipping to avoid duplicates"
- name: Collect backport targets
if: steps.check-existing.outputs.skip != 'true'
id: targets
run: |
TARGETS=()
declare -A SEEN=()
if [ "${{ github.event_name }}" = "workflow_dispatch" ]; then
LABELS=$(gh pr view ${{ inputs.pr_number }} --json labels | jq -r '.labels[].name')
else
LABELS='${{ toJSON(github.event.pull_request.labels) }}'
LABELS=$(echo "$LABELS" | jq -r '.[].name')
fi
add_target() {
local label="$1"
local target="$2"
if [ -z "$target" ]; then
return
fi
target=$(echo "$target" | xargs)
if [ -z "$target" ] || [ -n "${SEEN[$target]}" ]; then
return
fi
if git ls-remote --exit-code origin "$target" >/dev/null 2>&1; then
TARGETS+=("$target")
SEEN["$target"]=1
else
echo "::warning::Label '${label}' references missing branch '${target}'"
fi
}
while IFS= read -r label; do
[ -z "$label" ] && continue
if [[ "$label" =~ ^branch:(.+)$ ]]; then
add_target "$label" "${BASH_REMATCH[1]}"
elif [[ "$label" =~ ^backport:(.+)$ ]]; then
add_target "$label" "${BASH_REMATCH[1]}"
elif [[ "$label" =~ ^[0-9]+\.[0-9]+$ ]]; then
add_target "$label" "core/${label}"
fi
done <<< "$LABELS"
if [ "${#TARGETS[@]}" -eq 0 ]; then
echo "::error::No backport targets found (use labels like '1.24' or 'branch:release/hotfix')"
exit 1
fi
echo "targets=${TARGETS[*]}" >> $GITHUB_OUTPUT
echo "Found backport targets: ${TARGETS[*]}"
- name: Backport commits
if: steps.check-existing.outputs.skip != 'true'
id: backport
env:
PR_NUMBER: ${{ github.event_name == 'workflow_dispatch' && inputs.pr_number || github.event.pull_request.number }}
run: |
FAILED=""
SUCCESS=""
# Get PR data for manual triggers
if [ "${{ github.event_name }}" = "workflow_dispatch" ]; then
PR_DATA=$(gh pr view ${{ inputs.pr_number }} --json title,mergeCommit)
PR_TITLE=$(echo "$PR_DATA" | jq -r '.title')
MERGE_COMMIT=$(echo "$PR_DATA" | jq -r '.mergeCommit.oid')
else
PR_TITLE="${{ github.event.pull_request.title }}"
MERGE_COMMIT="${{ github.event.pull_request.merge_commit_sha }}"
fi
for target in ${{ steps.targets.outputs.targets }}; do
TARGET_BRANCH="${target}"
SAFE_TARGET=$(echo "$TARGET_BRANCH" | tr '/' '-')
BACKPORT_BRANCH="backport-${PR_NUMBER}-to-${SAFE_TARGET}"
echo "::group::Backporting to ${TARGET_BRANCH}"
# Fetch target branch (fail if doesn't exist)
if ! git fetch origin "${TARGET_BRANCH}"; then
echo "::error::Target branch ${TARGET_BRANCH} does not exist"
FAILED="${FAILED}${TARGET_BRANCH}:branch-missing "
echo "::endgroup::"
continue
fi
# Create backport branch
git checkout -b "${BACKPORT_BRANCH}" "origin/${TARGET_BRANCH}"
# Try cherry-pick
if git cherry-pick "${MERGE_COMMIT}"; then
git push origin "${BACKPORT_BRANCH}"
SUCCESS="${SUCCESS}${TARGET_BRANCH}:${BACKPORT_BRANCH} "
echo "Successfully created backport branch: ${BACKPORT_BRANCH}"
# Return to main (keep the branch, we need it for PR)
git checkout main
else
# Get conflict info
CONFLICTS=$(git diff --name-only --diff-filter=U | tr '\n' ',')
git cherry-pick --abort
echo "::error::Cherry-pick failed due to conflicts"
FAILED="${FAILED}${TARGET_BRANCH}:conflicts:${CONFLICTS} "
# Clean up the failed branch
git checkout main
git branch -D "${BACKPORT_BRANCH}"
fi
echo "::endgroup::"
done
echo "success=${SUCCESS}" >> $GITHUB_OUTPUT
echo "failed=${FAILED}" >> $GITHUB_OUTPUT
if [ -n "${FAILED}" ]; then
exit 1
fi
- name: Create PR for each successful backport
if: steps.check-existing.outputs.skip != 'true' && steps.backport.outputs.success
env:
GH_TOKEN: ${{ secrets.PR_GH_TOKEN }}
PR_NUMBER: ${{ github.event_name == 'workflow_dispatch' && inputs.pr_number || github.event.pull_request.number }}
run: |
# Get PR data for manual triggers
if [ "${{ github.event_name }}" = "workflow_dispatch" ]; then
PR_DATA=$(gh pr view ${{ inputs.pr_number }} --json title,author)
PR_TITLE=$(echo "$PR_DATA" | jq -r '.title')
PR_AUTHOR=$(echo "$PR_DATA" | jq -r '.author.login')
else
PR_TITLE="${{ github.event.pull_request.title }}"
PR_AUTHOR="${{ github.event.pull_request.user.login }}"
fi
for backport in ${{ steps.backport.outputs.success }}; do
IFS=':' read -r target branch <<< "${backport}"
if PR_URL=$(gh pr create \
--base "${target}" \
--head "${branch}" \
--title "[backport ${target}] ${PR_TITLE}" \
--body "Backport of #${PR_NUMBER} to \`${target}\`"$'\n\n'"Automatically created by backport workflow." \
--label "backport" 2>&1); then
# Extract PR number from URL
PR_NUM=$(echo "${PR_URL}" | grep -o '[0-9]*$')
if [ -n "${PR_NUM}" ]; then
gh pr comment "${PR_NUMBER}" --body "@${PR_AUTHOR} Successfully backported to #${PR_NUM}"
fi
else
echo "::error::Failed to create PR for ${target}: ${PR_URL}"
# Still try to comment on the original PR about the failure
gh pr comment "${PR_NUMBER}" --body "@${PR_AUTHOR} Backport branch created but PR creation failed for \`${target}\`. Please create the PR manually from branch \`${branch}\`"
fi
done
- name: Comment on failures
if: steps.check-existing.outputs.skip != 'true' && failure() && steps.backport.outputs.failed
env:
GH_TOKEN: ${{ github.token }}
run: |
if [ "${{ github.event_name }}" = "workflow_dispatch" ]; then
PR_DATA=$(gh pr view ${{ inputs.pr_number }} --json author,mergeCommit)
PR_NUMBER="${{ inputs.pr_number }}"
PR_AUTHOR=$(echo "$PR_DATA" | jq -r '.author.login')
MERGE_COMMIT=$(echo "$PR_DATA" | jq -r '.mergeCommit.oid')
else
PR_NUMBER="${{ github.event.pull_request.number }}"
PR_AUTHOR="${{ github.event.pull_request.user.login }}"
MERGE_COMMIT="${{ github.event.pull_request.merge_commit_sha }}"
fi
for failure in ${{ steps.backport.outputs.failed }}; do
IFS=':' read -r target reason conflicts <<< "${failure}"
if [ "${reason}" = "branch-missing" ]; then
gh pr comment "${PR_NUMBER}" --body "@${PR_AUTHOR} Backport failed: Branch \`${target}\` does not exist"
elif [ "${reason}" = "conflicts" ]; then
# Convert comma-separated conflicts back to newlines for display
CONFLICTS_LIST=$(echo "${conflicts}" | tr ',' '\n' | sed 's/^/- /')
COMMENT_BODY="@${PR_AUTHOR} Backport to \`${target}\` failed: Merge conflicts detected."$'\n\n'"Please manually cherry-pick commit \`${MERGE_COMMIT}\` to the \`${target}\` branch."$'\n\n'"<details><summary>Conflicting files</summary>"$'\n\n'"${CONFLICTS_LIST}"$'\n\n'"</details>"
gh pr comment "${PR_NUMBER}" --body "${COMMENT_BODY}"
fi
done