ci.yml

name: CI

on:
  pull_request:
    branches:
      - develop

jobs:
  lint:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: Setup Bun
        uses: oven-sh/setup-bun@v2

      - name: Lint all code
        run: bunx prettier --check .

  build:
    env:
      GH_TOKEN: ${{ github.token }}
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: Setup Bun
        uses: oven-sh/setup-bun@v2

      - name: Install dependencies
        run: bun install

      - name: Check proposal matches PR number
        run: |
          BASE_SHA="${{ github.event.pull_request.base.sha }}"
          HEAD_SHA="${{ github.event.pull_request.head.sha }}"
          PR_NUMBER="${{ github.event.pull_request.number }}"

          CHANGED_PROPOSALS=$(git diff --name-only "$BASE_SHA" "$HEAD_SHA" -- 'proposals/' \
            | grep -v '^proposals/0000-template\.md$' || true)

          COUNT=$(echo "$CHANGED_PROPOSALS" | grep -c . || true)

          if [ "$COUNT" -gt 1 ]; then
            echo "::error::PR touches $COUNT proposals. Only one proposal per PR is allowed."
            echo "$CHANGED_PROPOSALS"
            exit 1
          fi

          if [ "$COUNT" -eq 1 ]; then
            FILE=$(echo "$CHANGED_PROPOSALS" | head -1)
            FILENAME=$(basename "$FILE")
            FILE_NUMBER=$(echo "$FILENAME" | grep -oE '^[0-9]+' || true)
            # Strip leading zeros for comparison
            FILE_NUM=$((10#$FILE_NUMBER))

            if [ "$FILE_NUM" -ne "$PR_NUMBER" ]; then
              echo "::error::Proposal number ($FILE_NUM from $FILENAME) does not match PR number ($PR_NUMBER)."
              exit 1
            fi
          fi

      - name: Build
        run: bun run build