pr-title-linter-and-linker.yaml

name: "Lint and Link PR title"

on:
  pull_request:
    types:
      - opened
      - edited
      - reopened
      - synchronize

jobs:
  lint:
    name: Validate PR title And link Jira Issue
    runs-on: ubuntu-22.04
    env:
      JIRA_COMMENT_REGEX: "^.*Jira.*"
    steps:
      - uses: Slashgear/action-check-pr-title@v4.3.0
        id: lint
        with:
          regexp: "\\[(#?[A-Z]*-[0-9]*( |, )?){1,}\\]" # Regex the title should match.
        continue-on-error: true

      - name: Find Jira Comment
        uses: peter-evans/find-comment@v2
        id: fc
        with:
          issue-number: ${{ github.event.pull_request.number }}
          comment-author: 'github-actions[bot]'
          body-regex: "${{ env.JIRA_COMMENT_REGEX }}"

      - name: Extract Jira Issue to Link
        id: extract_jira_issue
        if: steps.lint.outcome == 'success'
        run: |
          PR_TITLE=$(echo "${{ github.event.pull_request.title }}")
          ISSUES_STR=$(awk -F'\\[|\\]' '{print $2}' <<< "$PR_TITLE" | sed "s/#//g" | sed "s/,//g")
          ISSUES=($ISSUES_STR)
          JIRA_ISSUE=$(echo ${ISSUES_STR##* })
          MARKDOWN_CARRIAGE_RETURN="<br>"
          MARKDOWN_PREFIX="- Link to"
          JIRA_COMMENT_MARKDOWN="This Pull Request refers to Jira issues:<br>"
          if [[ ${#ISSUES[@]} -eq 1 ]]
          then
            JIRA_COMMENT_MARKDOWN="This Pull Request refers to the following Jira issue"
            MARKDOWN_PREFIX=""
          fi

          for ISSUE in "${ISSUES[@]}"
          do
            JIRA_COMMENT_MARKDOWN+="$MARKDOWN_PREFIX [$ISSUE](https://pagopa.atlassian.net/browse/$ISSUE) $MARKDOWN_CARRIAGE_RETURN"
          done

          echo "JIRA_ISSUE=$JIRA_ISSUE" >> $GITHUB_ENV
          echo "JIRA_COMMENT_MARKDOWN=$JIRA_COMMENT_MARKDOWN" >> $GITHUB_ENV
      
      - name: Create Jira Link comment
        if: steps.lint.outcome == 'success'
        uses: peter-evans/create-or-update-comment@v2
        with:
          comment-id: ${{ steps.fc.outputs.comment-id }}
          issue-number: ${{ github.event.pull_request.number }}
          body: |
            ## Jira Pull Request Link ##
            ${{ env.JIRA_COMMENT_MARKDOWN }}
          edit-mode: replace
      - name: Create Empty Jira Link comment
        if: steps.lint.outcome != 'success'
        uses: peter-evans/create-or-update-comment@v2
        with:
          comment-id: ${{ steps.fc.outputs.comment-id }}
          issue-number: ${{ github.event.pull_request.number }}
          body: |
            ## Jira Pull request Link ##
            It seems this Pull Request has no issues that refers to Jira!!!
            Please check it out.
          edit-mode: replace
      - name: Failure message
        if: steps.lint.outcome != 'success'
        run: |
          echo "Pull request title (${{ github.event.pull_request.title }}) is not properly formatted or it is not related to any Jira issue"
          exit 1