name: test

concurrency:
  # For PRs, later CI runs preempt previous ones. e.g. a force push on a PR
  # cancels running CI jobs and starts all new ones.
  #
  # For non-PR pushes, concurrency.group needs to be unique for every distinct
  # CI run we want to have happen. Use run_id, which in practice means all
  # non-PR CI runs will be allowed to run without preempting each other.
  group: ${{ github.workflow }}-$${{ github.pull_request.number || github.run_id }}
  cancel-in-progress: true

on:
  pull_request:
    paths:
      - '**/*'
      - '!docs/**'
      - '!README.md'

jobs:
  changes:
    runs-on: ubuntu-latest
    outputs:
      changed: ${{ steps.changes.outputs.changed }}
    steps:
      - uses: actions/checkout@v4
        with:
          fetch-depth: 0
      - id: changes
        run: |
          changed() {
            local BASE=${{ github.event.pull_request.base.sha }}
            local HEAD=${{ github.event.pull_request.head.sha }}
            local MERGE_BASE=$(git merge-base $BASE $HEAD)
            git diff-tree -r --no-commit-id --name-only "$MERGE_BASE" "$HEAD" \
              | xargs python3 -c "import sys; from pathlib import Path; print(any(Path(x).match(glob) for x in sys.argv[1:] for glob in '$*'.split(' ')))"
          }

          echo changed=$(changed 'llama/llama.cpp/**' 'ml/backend/ggml/ggml/**') | tee -a $GITHUB_OUTPUT

  linux:
    needs: [changes]
    if: needs.changes.outputs.changed == 'True'
    strategy:
      matrix:
        include:
          - preset: CPU
          - preset: CUDA
            container: nvidia/cuda:12.8.1-devel-ubuntu22.04
            flags: '-DCMAKE_CUDA_ARCHITECTURES=87'
          - preset: ROCm
            container: rocm/dev-ubuntu-22.04:6.1.2
            extra-packages: rocm-libs
            flags: '-DAMDGPU_TARGETS=gfx1010 -DCMAKE_PREFIX_PATH=/opt/rocm'
    runs-on: linux
    container: ${{ matrix.container }}
    steps:
      - uses: actions/checkout@v4
      - run: |
          [ -n "${{ matrix.container }}" ] || sudo=sudo
          $sudo apt-get update
          $sudo apt-get install -y cmake ccache ${{ matrix.extra-packages }}
        env:
          DEBIAN_FRONTEND: noninteractive
      - uses: actions/cache@v4
        with:
          path: /github/home/.cache/ccache
          key: ccache-${{ runner.os }}-${{ runner.arch }}-${{ matrix.preset }}
      - run: |
          cmake --preset ${{ matrix.preset }} ${{ matrix.flags }}
          cmake --build --preset ${{ matrix.preset }} --parallel

  windows:
    needs: [changes]
    if: needs.changes.outputs.changed == 'True'
    strategy:
      matrix:
        include:
          - preset: CPU
          - preset: CUDA
            install: https://developer.download.nvidia.com/compute/cuda/12.8.0/local_installers/cuda_12.8.0_571.96_windows.exe
            flags: '-DCMAKE_CUDA_ARCHITECTURES=80'
          - preset: ROCm
            install: https://download.amd.com/developer/eula/rocm-hub/AMD-Software-PRO-Edition-24.Q4-WinSvr2022-For-HIP.exe
            flags: '-DAMDGPU_TARGETS=gfx1010'
    runs-on: windows
    steps:
      - run: |
          choco install -y --no-progress ccache ninja
          ccache -o cache_dir=${{ github.workspace }}\.ccache
      - if: matrix.preset == 'CUDA' || matrix.preset == 'ROCm'
        id: cache-install
        uses: actions/cache/restore@v4
        with:
          path: |
            C:\Program Files\NVIDIA GPU Computing Toolkit\CUDA
            C:\Program Files\AMD\ROCm
          key: ${{ matrix.install }}
      - if: matrix.preset == 'CUDA'
        name: Install CUDA ${{ matrix.cuda-version }}
        run: |
          $ErrorActionPreference = "Stop"
          if ("${{ steps.cache-install.outputs.cache-hit }}" -ne 'true') {
            Invoke-WebRequest -Uri "${{ matrix.install }}" -OutFile "install.exe"
            Start-Process -FilePath .\install.exe -ArgumentList (@("-s", "cudart_12.8", "nvcc_12.8", "cublas_12.8", "cublas_dev_12.8")) -NoNewWindow -Wait
          }

          $cudaPath = (Resolve-Path "C:\Program Files\NVIDIA GPU Computing Toolkit\CUDA\*").path
          echo "$cudaPath\bin" | Out-File -FilePath $env:GITHUB_PATH -Encoding utf8 -Append
      - if: matrix.preset == 'ROCm'
        name: Install ROCm ${{ matrix.rocm-version }}
        run: |
          $ErrorActionPreference = "Stop"
          if ("${{ steps.cache-install.outputs.cache-hit }}" -ne 'true') {
            Invoke-WebRequest -Uri "${{ matrix.install }}" -OutFile "install.exe"
            Start-Process -FilePath .\install.exe -ArgumentList '-install' -NoNewWindow -Wait
          }

          $hipPath = (Resolve-Path "C:\Program Files\AMD\ROCm\*").path
          echo "$hipPath\bin" | Out-File -FilePath $env:GITHUB_PATH -Encoding utf8 -Append
          echo "CC=$hipPath\bin\clang.exe" | Out-File -FilePath $env:GITHUB_ENV -Append
          echo "CXX=$hipPath\bin\clang++.exe" | Out-File -FilePath $env:GITHUB_ENV -Append
      - if: ${{ !cancelled() && steps.cache-install.outputs.cache-hit != 'true' }}
        uses: actions/cache/save@v4
        with:
          path: |
            C:\Program Files\NVIDIA GPU Computing Toolkit\CUDA
            C:\Program Files\AMD\ROCm
          key: ${{ matrix.install }}
      - uses: actions/checkout@v4
      - uses: actions/cache@v4
        with:
          path: ${{ github.workspace }}\.ccache
          key: ccache-${{ runner.os }}-${{ runner.arch }}-${{ matrix.preset }}
      - run: |
          Import-Module 'C:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise\Common7\Tools\Microsoft.VisualStudio.DevShell.dll'
          Enter-VsDevShell -VsInstallPath 'C:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise' -SkipAutomaticLocation  -DevCmdArguments '-arch=x64 -no_logo'
          cmake --preset "${{ matrix.preset }}" ${{ matrix.flags }}
          cmake --build --parallel --preset "${{ matrix.preset }}"
        env:
          CMAKE_GENERATOR: Ninja

  go_mod_tidy:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - name: check that 'go mod tidy' is clean
        run: go mod tidy --diff || (echo "Please run 'go mod tidy'." && exit 1)

  test:
    strategy:
      matrix:
        os: [ubuntu-latest, macos-latest, windows-latest]
    runs-on: ${{ matrix.os }}
    env:
      CGO_ENABLED: '1'
      GOEXPERIMENT: 'synctest'
    steps:
      - name: checkout
        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # 4.2.2

      - name: cache restore
        uses: actions/cache/restore@1bd1e32a3bdc45362d1e726936510720a7c30a57 # v4.2.0
        with:
          # Note: unlike the other setups, this is only grabbing the mod download
          # cache, rather than the whole mod directory, as the download cache
          # contains zips that can be unpacked in parallel faster than they can be
          # fetched and extracted by tar
          path: |
            ~/.cache/go-build
            ~/go/pkg/mod/cache
            ~\AppData\Local\go-build
          # NOTE: The -3- here should be incremented when the scheme of data to be
          # cached changes (e.g. path above changes).
          key: ${{ github.job }}-${{ runner.os }}-${{ matrix.goarch }}-${{ matrix.buildflags }}-go-3-${{ hashFiles('**/go.sum') }}-${{ github.run_id }}
          restore-keys: |
            ${{ github.job }}-${{ runner.os }}-${{ matrix.goarch }}-${{ matrix.buildflags }}-go-3-${{ hashFiles('**/go.sum') }}
            ${{ github.job }}-${{ runner.os }}-${{ matrix.goarch }}-${{ matrix.buildflags }}-go-3-

      - name: Setup Go
        uses: actions/setup-go@v5
        with:
          # The caching strategy of setup-go is less than ideal, and wastes
          # time by not saving artifacts due to small failures like the linter
          # complaining, etc. This means subsequent have to rebuild their world
          # again until all checks pass. For instance, if you mispell a word,
          # you're punished until you fix it. This is more hostile than
          # helpful.
          cache: false

          go-version-file: go.mod

      # It is tempting to run this in a platform independent way, but the past
      # shows this codebase will see introductions of platform specific code
      # generation, and so we need to check this per platform to ensure we
      # don't abuse go generate on specific platforms.
      - name: check that 'go generate' is clean
        if: always()
        run: |
          go generate ./...
          git diff --name-only --exit-code || (echo "Please run 'go generate ./...'." && exit 1)

      - name: go test
        if: always()
        run: go test -count=1 -benchtime=1x ./...

      # TODO(bmizerany): replace this heavy tool with just the
      # tools/checks/binaries we want and then make them all run in parallel
      # across jobs, not on a single tiny vm on Github Actions.
      - uses: golangci/golangci-lint-action@v6
        with:
          args: --timeout 10m0s -v

      - name: cache save
        # Always save the cache, even if the job fails. The artifacts produced
        # during the building of test binaries are not all for naught. They can
        # be used to speed up subsequent runs.
        if: always()

        uses: actions/cache/save@1bd1e32a3bdc45362d1e726936510720a7c30a57 # v4.2.0
        with:
          # Note: unlike the other setups, this is only grabbing the mod download
          # cache, rather than the whole mod directory, as the download cache
          # contains zips that can be unpacked in parallel faster than they can be
          # fetched and extracted by tar
          path: |
            ~/.cache/go-build
            ~/go/pkg/mod/cache
            ~\AppData\Local\go-build
          # NOTE: The -3- here should be incremented when the scheme of data to be
          # cached changes (e.g. path above changes).
          key: ${{ github.job }}-${{ runner.os }}-${{ matrix.goarch }}-${{ matrix.buildflags }}-go-3-${{ hashFiles('**/go.sum') }}-${{ github.run_id }}

  patches:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - name: Verify patches apply cleanly and do not change files
        run: |
          make -f Makefile.sync clean checkout apply-patches sync
          git diff --compact-summary --exit-code