name: Build Gluon
on:
  push:
    branches:
      - main
      - next
      - 'v20[2-9][0-9].[0-9].x'
  pull_request:
    types: [opened, synchronize, reopened]
  workflow_dispatch:

permissions:
  contents: read

concurrency:
  group: ${{ github.workflow }}-${{ github.ref || github.run_id }}-${{ github.event.pull_request.number || github.run_id }}
  cancel-in-progress: true

jobs:
  changed:
    permissions:
      contents: read  # for dorny/paths-filter to fetch a list of changed files
      pull-requests: read  # for dorny/paths-filter to read pull requests
    runs-on: ubuntu-22.04
    outputs:
      targets: ${{ steps.filter.outputs.changes }}
    steps:
      - uses: actions/checkout@v4

      # Filter targets based on changed files
      - uses: dorny/paths-filter@v3
        id: filter
        with:
          filters: .github/filters.yml

  build_firmware:
    needs: changed
    if: ${{ needs.changed.outputs.targets != '[]' && needs.changed.outputs.targets != '' }}
    strategy:
      fail-fast: false
      matrix:
        # Read back changed targets to create build matrix
        target: ${{ fromJSON(needs.changed.outputs.targets) }}
    runs-on: ubuntu-22.04
    steps:
      - uses: actions/checkout@v4

      - name: Show system information
        run: contrib/actions/show-system-info.sh

      - name: Build Docker container
        run: docker build -t gluon-ci-container contrib/docker

      - name: Build Gluon
        run: docker run --rm -v $PWD:/gluon-ci -w /gluon-ci --user "$(id -u):$(id -g)" gluon-ci-container contrib/actions/run-build.sh ${{ matrix.target }}

      - name: Archive build logs
        if: ${{ !cancelled() }}
        uses: actions/upload-artifact@v4
        with:
          name: ${{ matrix.target }}_logs
          path: openwrt/logs

      - name: Archive build output
        uses: actions/upload-artifact@v4
        with:
          name: ${{ matrix.target }}_output
          path: output