pr_workflow.yaml

name: PR workflow

on:
  push:
    branches:
      - "pull-request/[0-9]+"

concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true

jobs:
  check-changes:
    name: Check changes
    runs-on: ubuntu-latest
    outputs:
      build-cudaq: ${{ steps.filter.outputs.build-cudaq }}
      build-docs: ${{ steps.filter.outputs.build-docs }}
      build-all: ${{ steps.filter.outputs.build-all }}
      build-qec: ${{ steps.filter.outputs.build-qec }}
      build-solvers: ${{ steps.filter.outputs.build-solvers }}
    steps:
      - name: Checkout repository
        uses: actions/checkout@v4
        with:
          set-safe-directory: true

      - name: Lookup PR info
        id: get-pr-info
        env:
          GH_TOKEN: ${{ github.token }}
        uses: nv-gha-runners/get-pr-info@main

      - name: Check what needs testing
        uses: dorny/paths-filter@v3
        id: filter
        with:
          base: ${{ fromJSON(steps.get-pr-info.outputs.pr-info).base.sha }}
          filters: |
            build-cudaq:
              - '.github/workflows/cudaq_bump.yml'
              - '.github/actions/get-cudaq-build/**'
              - '.cudaq_version'
            build-docs:
              - '.github/workflows/docs.yaml'
              - 'docs/**'
              - '**/*.cpp'
              - '**/*.h'
              - '**/*.py'
            build-all:
              - '.github/actions/build-lib/action.yaml'
              - '.github/actions/build-lib/build_all.yaml'
              - '.github/workflows/all_libs.yaml'
              - 'cmake/Modules/**'
              - '**/CMakeLists.txt'
            build-qec:
              - '.github/actions/build-lib/action.yaml'
              - '.github/actions/build-lib/build_qec.sh'
              - '.github/workflows/lib_qec.yaml'
              - 'cmake/Modules/**'
              - 'libs/core/**/*.cpp'
              - 'libs/core/**/*.h'
              - 'libs/core/**/CMakeLists.txt'
              - 'libs/qec/**/*.cpp'
              - 'libs/qec/**/*.h'
              - 'libs/qec/**/*.in'
              - 'libs/qec/**/*.py'
              - 'libs/qec/**/CMakeLists.txt'
            build-solvers:
              - '.github/actions/build-lib/action.yaml'
              - '.github/actions/build-lib/build_solvers.sh'
              - '.github/workflows/lib_solvers.yaml'
              - 'cmake/Modules/**'
              - 'libs/core/**/*.cpp'
              - 'libs/core/**/*.h'
              - 'libs/core/**/CMakeLists.txt'
              - 'libs/solvers/**/*.cpp'
              - 'libs/solvers/**/*.h'
              - 'libs/solvers/**/*.in'
              - 'libs/solvers/**/*.py'
              - 'libs/solvers/**/CMakeLists.txt'

  build-cudaq:
    name: Build CUDAQ
    needs: [check-changes]
    if: needs.check-changes.outputs.build-cudaq == 'true'
    runs-on: ${{ startsWith(github.repository, 'NVIDIA/cudaqx') && 'linux-amd64-cpu32' || 'ubuntu-latest' }}
    container: ghcr.io/nvidia/cuda-quantum-devdeps:ext-cu12.0-gcc11-main
    permissions:
      actions: write
      contents: read
      pull-requests: read
    steps:
      - name: Get code
        uses: actions/checkout@v4
        with:
          set-safe-directory: true

      - name: Lookup PR info
        id: get-pr-info
        env:
          GH_TOKEN: ${{ github.token }}
        uses: nv-gha-runners/get-pr-info@main

      - name: Get required CUDAQ version
        id: get-cudaq-version
        uses: ./.github/actions/get-cudaq-version

      - name: Get CUDAQ build
        uses: ./.github/actions/get-cudaq-build
        with:
          repo: ${{ steps.get-cudaq-version.outputs.repo }}
          ref: ${{ steps.get-cudaq-version.outputs.ref }}
          token: ${{ secrets.CUDAQ_ACCESS_TOKEN }}
          pr-number: ${{ fromJSON(steps.get-pr-info.outputs.pr-info).number }}
          save-build: true
          save-ccache: false

  # In the following, we need the `always()` fucntion in order to guarantee
  # that these jobs will run when their conditions are met, even if the
  # `build-cudaq` job is skipped.

  build-docs:
    name: Docs
    needs: [check-changes, build-cudaq]
    if: always() && needs.check-changes.outputs.build-docs == 'true'
    uses: ./.github/workflows/docs.yaml

  build-all:
    name: All libs
    needs: [check-changes, build-cudaq]
    if: always() && (needs.check-changes.outputs.build-all == 'true' || needs.check-changes.outputs.build-cudaq == 'true')
    uses: ./.github/workflows/all_libs.yaml

  build-qec:
    name: QEC
    needs: [check-changes, build-cudaq]
    if: always() && (needs.check-changes.outputs.build-qec == 'true' || needs.check-changes.outputs.build-cudaq == 'true')
    uses: ./.github/workflows/lib_qec.yaml

  build-solvers:
    name: Solvers
    needs: [check-changes, build-cudaq]
    if: always() && (needs.check-changes.outputs.build-solvers == 'true' || needs.check-changes.outputs.build-cudaq == 'true')
    uses: ./.github/workflows/lib_solvers.yaml