setup-repo.yml

name: Setup Repository Metadata

on:
  push:
    branches: [main]
  workflow_dispatch:

jobs:
  setup:
    runs-on: ubuntu-latest

    steps:
    - name: Extract Metadata from Repo Name
      id: extract
      run: |
        REPO_NAME="${GITHUB_REPOSITORY##*/}"

        # Expected format: PESU_CSE_SE_TaskManager_A_P01
        if [[ "$REPO_NAME" =~ PESU_([A-Z]+)_([A-Z]+)_(.+)_([A-Z])_P([0-9]+) ]]; then
          DEPARTMENT="${BASH_REMATCH[1]}"
          COURSE="${BASH_REMATCH[2]}"
          PROJECT="${BASH_REMATCH[3]}"
          SECTION="${BASH_REMATCH[4]}"
          PID="P${BASH_REMATCH[5]}"

          echo "department=$DEPARTMENT" >> $GITHUB_OUTPUT
          echo "course=$COURSE" >> $GITHUB_OUTPUT
          echo "project=$PROJECT" >> $GITHUB_OUTPUT
          echo "section=$SECTION" >> $GITHUB_OUTPUT
          echo "project_id=$PID" >> $GITHUB_OUTPUT

          TOPICS=$(jq -nc --arg d "$DEPARTMENT" --arg c "$COURSE" --arg p "$PROJECT" --arg s "$SECTION" --arg pid "$PID" \
            '[ "pesu", "template-based", "autotag", $d, $c, $p, $s, $pid ]')
          echo "TOPICS=$TOPICS" >> $GITHUB_OUTPUT
        else
          echo "::error title=Invalid Repository Name::Repo name '$REPO_NAME' does not match expected pattern."
          exit 1
        fi

    - name: Set Repository Topics
      uses: actions/github-script@v7
      with:
        github-token: ${{ secrets.PAT_TOKEN || secrets.GITHUB_TOKEN }}
        script: |
          const repo = context.repo.repo;
          const owner = context.repo.owner;
          const topics = JSON.parse(`${{ steps.extract.outputs.TOPICS }}`);

          try {
            const result = await github.rest.repos.replaceAllTopics({
              owner,
              repo,
              names: topics
            });
            console.log(`✅ Topics set for ${repo}:`, topics);
          } catch (error) {
            core.warning("⚠️ Failed to set topics. Make sure PAT_TOKEN is available for private repos.");
            core.warning(error.message);
          }