version_bump.yml

name: "Version Increment"

on:
  # Run this action on any Pull Request raised against ARM
  pull_request:
    # Ensure changes re-run the version script (i.e. title change)
    types: [opened, edited, synchronize]
    # Don't run on changes to the below paths
    paths-ignore:
      - 'arm_wiki/**'
      - '.github/**'

  # Allows you to run this workflow manually from the Actions tab
  workflow_dispatch:

permissions:
  contents: write
  pull-requests: write

jobs:
  version:
    runs-on: ubuntu-latest
    steps:
      - name: Get branch name
        id: branch-name
        uses: tj-actions/branch-names@v8

      - name: Checkout code
        uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: Fetch main branch
        run: |
          git fetch origin main:main

      - name: Check for version bump
        id: version-check
        run: |
          if ! git diff main --name-only | grep -q 'VERSION'; then
            echo "VERSION_UPDATED=false" >> "$GITHUB_ENV"
            echo "No Version update found in commit"
          else
            echo "VERSION_UPDATED=true" >> "$GITHUB_ENV"
            echo "Version update found in commit"
          fi

      - name: Determine new version
        if: env.VERSION_UPDATED == 'false'
        id: determine-version
        env:
          # Safely get title (avoid injection attacks)
          PR_TITLE: ${{ github.event.pull_request.title }}
        run: |
          # Set Title environment flag to false
          TITLE_FLAG="false"
          
          echo "PR Title: $PR_TITLE"
          if [[ "$PR_TITLE" == *"[FEATURE]"* ]]; then
            VERSION_TYPE="minor"
            echo "VERSION_TYPE=$VERSION_TYPE" >> $GITHUB_ENV
            echo "PR set to FEATURE updating minor version"
            TITLE_FLAG="true"
          elif [[ "$PR_TITLE" == *"[BUGFIX]"* ]]; then
            VERSION_TYPE="patch"
            echo "VERSION_TYPE=$VERSION_TYPE" >> $GITHUB_ENV
            echo "PR set to BUGFIX updating patch version"
            TITLE_FLAG="true"
          else
            echo "No version bump flag found in PR title. Exiting."
            echo "Edit your PR title to include either FEATURE or BUGFIX"
          fi
          
          # If Feature or Bugfix update the version
          if [[ "$TITLE_FLAG" == "true" ]]; then
            CURRENT_VERSION=$(cat VERSION)
            IFS='.' read -r -a VERSION_PARTS <<< "$CURRENT_VERSION"
            if [[ "$VERSION_TYPE" == "minor" ]]; then
              VERSION_PARTS[1]=$((VERSION_PARTS[1]+1))
              VERSION_PARTS[2]=0
            elif [[ "$VERSION_TYPE" == "patch" ]]; then
              VERSION_PARTS[2]=$((VERSION_PARTS[2]+1))
            fi
            NEW_VERSION="${VERSION_PARTS[0]}.${VERSION_PARTS[1]}.${VERSION_PARTS[2]}"
            echo "NEW_VERSION=$NEW_VERSION" >> $GITHUB_ENV
            echo "CURRENT_VERSION=$CURRENT_VERSION" >> $GITHUB_ENV
            echo "New Version: " $NEW_VERSION
          fi
          
          # Set variables to global environment variables for later
          echo "TITLE_FLAG=$TITLE_FLAG" >> $GITHUB_ENV
          echo "PR_TITLE=$PR_TITLE" >> $GITHUB_ENV
          echo "VERSION_TYPE=$VERSION_TYPE" >> $GITHUB_ENV

      - name: Configure Git user
        run: |
          git config --local user.email "github-actions[bot]@users.noreply.github.com"
          git config --local user.name "github-actions[bot]"

      - name: Pull latest changes from remote
        if: env.VERSION_UPDATED == 'false' && env.TITLE_FLAG == 'true'
        run: |
          git pull --rebase origin ${{ github.head_ref }}

      - name: Update VERSION file and Push Changes
        if: env.VERSION_UPDATED == 'false' && env.TITLE_FLAG == 'true'
        run: |
          echo "$NEW_VERSION" > VERSION
          git add VERSION
          git commit -m "[Automated] Release: ${VERSION_TYPE} - Version from $CURRENT_VERSION to $NEW_VERSION"
          
          # Use the pull request's branch name to push changes
          BRANCH="${{ github.head_ref }}"
          echo "Pushing changes to branch: $BRANCH"
          
          # Push changes to the PR branch
          git push origin HEAD:$BRANCH

      - name: Debug Environment Variables
        run: |
          echo "PR_TITLE=${{ env.PR_TITLE }}"
          echo "NEW_VERSION=${{ env.NEW_VERSION }}"
          echo "CURRENT_VERSION=${{ env.CURRENT_VERSION }}"
          echo "VERSION_TYPE=${{ env.VERSION_TYPE }}"

      - name: Comment on PR
        if: env.VERSION_UPDATED == 'false'
        uses: actions/github-script@v7
        with:
          github-token: ${{ secrets.GITHUB_TOKEN }}
          script: |
            // Retrieve variables from the environment
            const titleFlag = process.env.TITLE_FLAG;
            const prNumber = context.issue.number;
            const prTitle = process.env.PR_TITLE;
            const newVersion = process.env.NEW_VERSION;
            const currentVersion = process.env.CURRENT_VERSION;
            const versionType = process.env.VERSION_TYPE;
            
            // Prepare the message based on the title flag
            let prBody;
            if (titleFlag === "false") {
              prBody = `Version Bot\n **PR title:** ${prTitle}\n **No valid version flag found**. PR title must include either [FEATURE] or [BUGFIX] to auto-increment the version.\n **Please update the PR title** and re-run the workflow.`;
            } else {
              prBody = `Version Bot:\n **PR title:** ${prTitle}\n Updated version: **${currentVersion}** to **${newVersion}**\n Release version: **${versionType}**`;
            }
            
            // Generate PR comment
            github.rest.issues.createComment({
              owner: context.repo.owner,
              repo: context.repo.repo,
              issue_number: prNumber,
              body: prBody
            })

      - name: Set tag for non-default branch
        if: steps.branch-name.outputs.is_default == 'false' && steps.branch-name.outputs.default_branch != '' && env.TITLE_FLAG == 'true'
        run: |
          echo "Branch name is ${{ steps.branch-name.outputs.ref_branch }}"
          echo "Main name is ${{ steps.branch-name.outputs.default_branch }}"
          echo "TAG=${{ steps.branch-name.outputs.current_branch }}" >> $GITHUB_ENV