code-freeze-regex-branch.yml

# ********************************************************************************
# Copyright (c) 2024 Contributors to the Eclipse Foundation
#
# See the NOTICE file(s) with this work for additional
# information regarding copyright ownership.
#
# This program and the accompanying materials are made
# available under the terms of the Apache Software License 2.0
# which is available at https://www.apache.org/licenses/LICENSE-2.0.
#
# SPDX-License-Identifier: Apache-2.0
# ********************************************************************************

---
name: Code Freeze for regex branch

# Controls when the workflow will run
on:
  workflow_call:
    inputs:
      branch-regex:
        required: true
        type: string
    outputs:
      regex-matches:
        description: "Whether the pull request target branch matches the input branch-regex"
        value: ${{ jobs.codefreeze_branch_check.outputs.regex-matches }}

permissions:
  contents: write
  pull-requests: write

jobs:
  codefreeze_branch_check:
    runs-on: ubuntu-latest
    outputs:
      regex-matches: ${{ steps.check-freeze-branch.outputs.code_freeze_branch }}
    steps:
      - name: Get pull request target branch
        if: github.event_name == 'pull_request_target' || (github.event_name == 'issue_comment' && github.event.issue.pull_request)
        id: get-pr-target-branch
        run: |
          echo "Getting target branch"
          if [[ -z $PR_NUMBER ]]; then
            PR_NUMBER="${{ github.event.pull_request.number }}"
          fi
          TARGET_BRANCH="$(gh pr view "$PR_NUMBER" --repo "$REPOSITORY" --json baseRefName --jq '.baseRefName')"
          echo "pr_target_branch=$TARGET_BRANCH" >> "$GITHUB_OUTPUT"
          echo "PR target branch = $TARGET_BRANCH"
        env:
          REPOSITORY: ${{ github.repository }}
          PR_NUMBER: ${{ github.event.issue.number }}
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

      - name: Check if target branch is a code freeze branch
        if: github.event_name == 'pull_request_target' || (github.event_name == 'issue_comment' && github.event.issue.pull_request)
        id: check-freeze-branch
        run: |
          echo "Checking if $PR_TARGET_BRANCH matches a code freeze branch with regex $BRANCH_REGEX"
          if echo "$PR_TARGET_BRANCH" | grep -E "$BRANCH_REGEX"; then
            FREEZE_BRANCH='true'
          else
            FREEZE_BRANCH='false'
          fi
          echo "code_freeze_branch=$FREEZE_BRANCH" >> "$GITHUB_OUTPUT"
          echo "Is $PR_TARGET_BRANCH a code freeze branch? => $FREEZE_BRANCH"
        env:
          PR_TARGET_BRANCH: ${{ steps.get-pr-target-branch.outputs.pr_target_branch }}
          BRANCH_REGEX: ${{ inputs.branch-regex }}