name: Backport
on:
workflow_dispatch:
pull_request_target:
types: [closed]
branches: ['main']
env:
MAIN_BRANCH: main
FEATURE_BRANCH_PREFIX: 'origin/feature/'
permissions:
contents: write # so it can comment
pull-requests: write # so it can create pull requests
jobs:
#---------------------------------------------------
list_branches:
name: Get target branches
runs-on: ubuntu-latest
outputs:
branches: ${{ steps.branches.outputs.BRANCHES }}
steps:
- uses: actions/checkout@v4
with:
# Fetch all branches
fetch-depth: 0
- name: List feature branches
id: feature_branches
# list all branches, filtering for prefix, and cutting off remotes/origin/
# then finally substitute newlines for spaces, excluding from the list the source branch which triggered the action
run: |
set -x
branches=$(git branch --list --all | grep "$FEATURE_BRANCH_PREFIX" | cut -c 18- | while read -r line
do
# in case of commit : if found branch is not the one we are committing on (GITHUB_REF_NAME)
# in case of pull request : if found branch is not the one we are pulling from (GITHUB_HEAD_REF)
if [ "$line" != "$GITHUB_REF_NAME" ] && [ "$line" != "$GITHUB_HEAD_REF" ]
then
echo \"$line\"","
fi
done
)
space_delimited=${branches//$'\n'/ }
echo "FEATURE_BRANCHES=[ ${space_delimited} ]" >> $GITHUB_OUTPUT
echo "FEATURE_BRANCHES=[ ${space_delimited} ]"
- name: Select branches according to input branch
id: branches
shell: bash
run: |
case "$GITHUB_REF_NAME" in
#"readonly-prod")
# branches='[ "rbw-main-for-117" ]'
# ;;
#"$MAIN_BRANCH")
# branches='[ "'$UAT_BRANCH'" ]'
# ;;
#"$UAT_BRANCH")
# branches='[ "'$INTEG_BRANCH'" ]'
# ;;
#"$INTEG_BRANCH")
# branches='${{ steps.feature_branches.outputs.FEATURE_BRANCHES }}'
# ;;
"$MAIN_BRANCH")
branches='${{ steps.feature_branches.outputs.FEATURE_BRANCHES }}'
;;
esac
echo "BRANCHES=${branches}" >> $GITHUB_OUTPUT
echo "BRANCHES=${branches}"
#---------------------------------------------------
# my_echo:
# runs-on: ubuntu-latest
# needs:
# - list_branches
# steps:
# - name: Target branch(es)
# run: |
# echo "${{ needs.list_branches.outputs.branches }}"
# echo "#${{ fromJSON(needs.list_branches.outputs.branches) }}#"
#---------------------------------------------------
# see https://thekevinwang.com/2021/09/19/github-actions-dynamic-matrix/
backport:
if: ${{ needs.list_branches.outputs.branches != '[ ]' }}
name: Backport ${{ github.ref_name }} to ${{ matrix.branch }}
runs-on: ubuntu-latest
needs:
- list_branches
#- my_echo
strategy:
# If one job fails, the whole job fails
fail-fast: false
matrix:
branch: ${{ fromJSON(needs.list_branches.outputs.branches) }}
steps:
- run: echo ${{ matrix.branch }}
- uses: actions/checkout@v4
with:
# Fetch all branches
fetch-depth: 0
- name: Backport from source to target branch(es)
id: pr
uses: rupertbarrow/cm-backport-pr@main
with:
token: ${{ secrets.GITHUB_TOKEN }}
pr-from-branch: ${{ github.repository_owner }}:${{ github.ref_name }}
pr-to-branch: ${{ matrix.branch }}
pr-title: Backport to branch ${{ matrix.branch }} (from ${{ github.ref_name }})
#pr-body: "The PR body."
pr-fail-if-exists: false
pr-update-if-exists: true
maintainer-can-modify: true
draft: false
merge-pr-after-created: false
#merge-commit-title: "Merge commit title"
#merge-commit-body: "Merge commit message."
#merge-method: squash
- name: Pull ${{ steps.pr.outputs.pr-number }} created/updated ${{ steps.pr.outputs.pr-url }}
run: |
echo "PR Number: ${{ steps.pr.outputs.pr-number }}"
echo "PR URL: ${{ steps.pr.outputs.pr-url }}"
echo "PR SHA: ${{ steps.pr.outputs.pr-sha }}"
