ci.yml

name: CI

on:
  push:
    branches:
    - master
  pull_request:
    types:
    - opened
    - synchronize

env:
  EXE_NAME: fortran-src

jobs:
  ubuntu-stack-test:
    runs-on: ubuntu-latest
    name: Ubuntu / Stack / test
    steps:
    - uses: actions/checkout@v4

    # relative paths are relative to the project directory
    - name: Cache Stack build artifacts (user + project)
      uses: actions/cache@v4
      with:
        path: |
          ~/.stack
          .stack-work
        # best effort for cache: tie it to Stack resolver and package config
        key: ${{ runner.os }}-stack-${{ hashFiles('stack.yaml.lock', 'package.yaml') }}
        restore-keys: |
          ${{ runner.os }}-stack

    - name: Install project dependencies
      run: stack --no-terminal test --only-dependencies

    - name: Build and run tests
      run: stack --no-terminal haddock --test --no-haddock-deps

    - name: Install (to place executable at a known location)
      run: stack --no-terminal install

    - name: Upload executable
      uses: actions/upload-artifact@v4
      with:
        path: ~/.local/bin/${{ env.EXE_NAME }}
        name: ${{ env.EXE_NAME }}-ubuntu-stack-${{ github.sha }}
        if-no-files-found: error

  ubuntu-cabal-test:
    runs-on: ubuntu-latest
    name: Ubuntu / GHC ${{ matrix.ghc }}, Cabal / test

    strategy:
      fail-fast: false      # don't stop if one job (= GHC version) fails
      matrix:
        cabal: [latest]
        ghc:
        - "9.0"
        - "9.2"
        - "9.4"

    steps:

    # TODO: GHC decides to recompile based on timestamp, so cache isn't used
    # Preferably GHC would work via hashes instead. Stack had this feature
    # merged in Aug 2020.
    # Upstream GHC issue: https://gitlab.haskell.org/ghc/ghc/-/issues/16495
    # My issue on haskell/actions: https://github.com/haskell/actions/issues/41
    # This also requires us to do a deep fetch, else we don't get the Git commit
    # history we need to rewrite mod times.
    - uses: actions/checkout@v4
      with:
        fetch-depth: 0
    - name: Set all tracked file modification times to the time of their last commit
      run: |
        rev=HEAD
        for f in $(git ls-tree -r -t --full-name --name-only "$rev") ; do
            touch -d $(git log --pretty=format:%cI -1 "$rev" -- "$f") "$f";
        done

    - name: Setup Haskell build environment
      id: setup-haskell-build-env
      uses: haskell/actions/setup@v4
      with:
        ghc-version: ${{ matrix.ghc }}
        cabal-version: ${{ matrix.cabal }}

    - run: cabal freeze

    - name: Cache Cabal build artifacts
      uses: actions/cache@v4
      with:
        path: |
          ${{ steps.setup-haskell-build-env.outputs.cabal-store }}
          dist-newstyle
        key: ${{ runner.os }}-cabal-${{ matrix.ghc }}-${{ hashFiles('cabal.project.freeze') }}
        restore-keys: |
          ${{ runner.os }}-cabal-${{ matrix.ghc }}

    - name: Test
      run: cabal test --test-show-details=streaming
      env:
        HSPEC_OPTIONS: --color

  mac-cabal-test:
    runs-on: macos-latest
    name: Mac / GHC ${{ matrix.ghc }}, Cabal / test
    strategy:
      fail-fast: false      # don't stop if one job (= GHC version) fails
      matrix:
        cabal: [latest]
        ghc: ["9.2"]
    steps:

    # TODO figure out timestamp fixer on Mac (no Mac available to test)
    - uses: actions/checkout@v4

    - name: Setup Haskell build environment
      id: setup-haskell-build-env
      uses: haskell/actions/setup@v4
      with:
        ghc-version: ${{ matrix.ghc }}
        cabal-version: ${{ matrix.cabal }}

    - run: cabal freeze

    - name: Cache Cabal build artifacts
      uses: actions/cache@v4
      with:
        path: |
          ${{ steps.setup-haskell-build-env.outputs.cabal-store }}
          dist-newstyle
        key: ${{ runner.os }}-cabal-${{ matrix.ghc }}-${{ hashFiles('cabal.project.freeze') }}
        restore-keys: |
          ${{ runner.os }}-cabal-${{ matrix.ghc }}

    - name: Build
      run: cabal install

    - name: Test
      run: cabal test --test-show-details=streaming
      env:
        HSPEC_OPTIONS: --color

    # note that Cabal uses symlinks -- actions/upload-artifact@v4 apparently
    # dereferences for us
    - name: Upload executable
      uses: actions/upload-artifact@v4
      with:
        path: ~/.cabal/bin/${{ env.EXE_NAME }}
        name: ${{ env.EXE_NAME }}-macos-ghc-${{ matrix.ghc }}-cabal-${{ github.sha }}
        if-no-files-found: error

  windows-cabal-test:
    runs-on: windows-latest
    name: Windows / GHC ${{ matrix.ghc }}, Cabal / test
    strategy:
      fail-fast: false      # don't stop if one job (= GHC version) fails
      matrix:
        cabal: [latest]
        ghc: ["9.2"]
    steps:
    # TODO figure out timestamp fixer on Windows (need Bash)
    - uses: actions/checkout@v4

    - name: Setup Haskell build environment
      id: setup-haskell-build-env
      uses: haskell/actions/setup@v4
      with:
        ghc-version: ${{ matrix.ghc }}
        cabal-version: ${{ matrix.cabal }}

    - run: cabal freeze

    - name: Cache Cabal build artifacts
      uses: actions/cache@v4
      with:
        path: |
          ${{ steps.setup-haskell-build-env.outputs.cabal-store }}
          dist-newstyle
        key: ${{ runner.os }}-cabal-${{ matrix.ghc }}-${{ hashFiles('cabal.project.freeze') }}
        restore-keys: |
          ${{ runner.os }}-cabal-${{ matrix.ghc }}

    - name: Build
      run: cabal install

    - name: Test
      run: cabal test --test-show-details=streaming
      env:
        HSPEC_OPTIONS: --color

    - name: Upload executable
      uses: actions/upload-artifact@v4
      with:
        path: "C:/cabal/bin/${{ env.EXE_NAME }}.exe"
        name: ${{ env.EXE_NAME }}-windows-ghc-${{ matrix.ghc }}-cabal-${{ github.sha }}.exe
        if-no-files-found: error