setup-repo.yml

name: Auto-tag Repo After Template Use

on:
  push:
    branches:
      - main

permissions:
  contents: write

jobs:
  tag-repo:
    runs-on: ubuntu-latest

    steps:
      - name: Extract repo name
        id: extract
        run: |
          REPO_NAME="${{ github.repository }}"
          REPO_ONLY="${REPO_NAME#*/}"
          echo "repo_only=$REPO_ONLY" >> $GITHUB_OUTPUT

      - name: Parse and set topics
        env:
          GH_TOKEN: ${{ secrets.REPO_SETUP_TOKEN }}
          REPO: ${{ github.repository }}
          REPO_NAME: ${{ steps.extract.outputs.repo_only }}
        run: |
          IFS='_' read -r _ DEPT SUBJECT TITLE SECTION ID <<< "$REPO_NAME"

          echo "Applying topics: $DEPT $SUBJECT $SECTION"

          curl -X PATCH -H "Authorization: token $GH_TOKEN" \
            -H "Accept: application/vnd.github+json" \
            https://api.github.com/repos/$REPO \
            -d "{\"topics\": [\"$DEPT\", \"$SUBJECT\", \"$SECTION\"]}"