# Runs on notable pushes to master.

# Builds incrementally and runs functional tests on linux,
# using the latest supported GHC version.

name: push CI

on:
  push:
    branches: [ master ]
    paths:
      - '.github/workflows/push.yml'
      - 'stack*.yaml'
      - 'hledger-lib/**'
      - 'hledger/**'
      - 'hledger-ui/**'
      - 'hledger-web/**'
      - 'tests/**'
      - '!**.md'
      - '!**.1'
      - '!**.5'
      - '!**.info'
      - '!**.txt'

jobs:
  build:
    runs-on: ubuntu-latest
    strategy:
      fail-fast: false
      matrix:
        plan:
        # - { ghc: "80" , stack: "stack --stack-yaml=stack8.0.yaml" }
        # - { ghc: "82" , stack: "stack --stack-yaml=stack8.2.yaml" }
        # - { ghc: "84" , stack: "stack --stack-yaml=stack8.4.yaml" }
        # - { ghc: "86" , stack: "stack --stack-yaml=stack8.6.yaml" }
        # - { ghc: "88" , stack: "stack --stack-yaml=stack.yaml" }
        - { ghc: "810"  , stack: "stack --stack-yaml=stack8.10.yaml" }

    steps:

    - name: Check out
      uses: actions/checkout@v2
      # deep clone so we can restore timestamps (see below)
      with:
        fetch-depth: 0

    # Restore timestamps to help stack not rebuild unchanged files.
    # https://stackoverflow.com/questions/60906336
    # https://stackoverflow.com/a/36243002/84401
    # https://www.reddit.com/r/haskell/comments/g00ldn/haskell_stack_on_github_actions/
    - name: Restore source file timestamps
      run: |
        git ls-tree -r --name-only HEAD | while read filename; do
          TS="$(git log -1 --format="%ct" -- ${filename})"
          touch "${filename}" -mt "$(date --date="@$TS" "+%Y%m%d%H%M.%S")"
        done
      # help emacs highlighter: "

    # things to be cached/restored:

    - name: Cache stack global package db
      id:   stack-global
      uses: actions/cache@v2.1
      with:
        path: ~/.stack
        key: ${{ runner.os }}-stack-global-${{ matrix.plan.ghc }}-${{ hashFiles('**.yaml') }}
        restore-keys: |
             ${{ runner.os }}-stack-global-${{ matrix.plan.ghc }}

    - name: Cache stack-installed programs in ~/.local/bin
      id:   stack-programs
      uses: actions/cache@v2.1
      with:
        path: ~/.local/bin
        key: ${{ runner.os }}-stack-programs-${{ matrix.plan.ghc }}-${{ hashFiles('**.yaml') }}
        restore-keys: |
             ${{ runner.os }}-stack-programs-${{ matrix.plan.ghc }}

    - name: Cache .stack-work
      uses: actions/cache@v2.1
      with:
        path: .stack-work
        key: ${{ runner.os }}-stack-work-${{ matrix.plan.ghc }}-${{ hashFiles('**.yaml') }}
        restore-keys: |
             ${{ runner.os }}-stack-work-${{ matrix.plan.ghc }}

    - name: Cache hledger-lib/.stack-work
      uses: actions/cache@v2.1
      with:
        path: hledger-lib/.stack-work
        key: ${{ runner.os }}-hledger-lib-stack-work-${{ matrix.plan.ghc }}-${{ hashFiles('hledger-lib/package.yaml') }}
        restore-keys: |
             ${{ runner.os }}-hledger-lib-stack-work-${{ matrix.plan.ghc }}

    - name: Cache hledger/.stack-work
      uses: actions/cache@v2.1
      with:
        path: hledger/.stack-work
        key: ${{ runner.os }}-hledger-stack-work-${{ matrix.plan.ghc }}-${{ hashFiles('hledger/package.yaml') }}
        restore-keys: |
             ${{ runner.os }}-hledger-stack-work-${{ matrix.plan.ghc }}

    - name: Cache hledger-ui/.stack-work
      uses: actions/cache@v2.1
      with:
        path: hledger-ui/.stack-work
        key: ${{ runner.os }}-hledger-ui-stack-work-${{ matrix.plan.ghc }}-${{ hashFiles('hledger-ui/package.yaml') }}
        restore-keys: |
             ${{ runner.os }}-hledger-ui-stack-work-${{ matrix.plan.ghc }}

    - name: Cache hledger-web/.stack-work
      uses: actions/cache@v2.1
      with:
        path: hledger-web/.stack-work
        key: ${{ runner.os }}-hledger-web-stack-work-${{ matrix.plan.ghc }}-${{ hashFiles('hledger-web/package.yaml') }}
        restore-keys: |
             ${{ runner.os }}-hledger-web-stack-work-${{ matrix.plan.ghc }}

    # actions:

    - name: Install stack
      # curl -L https://get.haskellstack.org/stable/linux-x86_64.tar.gz | tar xz --wildcards --strip-components=1 -C $INSTALLDIR '*/stack'
      # mkdir -p ~/.local/bin
      # export PATH=~/.local/bin:$PATH
      # if [[ ! -x ~/.local/bin/stack ]]; then curl -L https://www.stackage.org/stack/linux-x86_64 | tar xz --wildcards --strip-components=1 -C ~/.local/bin '*/stack'; chmod a+x ~/.local/bin/stack; fi
      run: |
        $stack --version
      env:
        stack: ${{ matrix.plan.stack }}

    - name: Install GHC
      env:
        stack: ${{ matrix.plan.stack }}
      run: |
        $stack setup --install-ghc

    - name: Install haskell deps
      env:
        stack: ${{ matrix.plan.stack }}
      run: |
        $stack build --only-dependencies

    - name: Build hledger fast
      env:
        stack: ${{ matrix.plan.stack }}
      run: |
        $stack build --fast --ghc-options=-Werror 
        # --ghc-options=-fforce-recomp   # needed occasionally to clear out stale compiled modules
        #  --pedantic

    - name: Install shelltestrunner
      env:
        stack: ${{ matrix.plan.stack }}
      run: |
        export PATH=~/.local/bin:$PATH
        if [[ ! -x ~/.local/bin/shelltest ]]; then $stack install shelltestrunner-1.9; fi
        shelltest --version

    - name: Test functional tests (excluding addons)
      env:
        stack: ${{ matrix.plan.stack }}
      run: |
        export PATH=~/.local/bin:$PATH
        COLUMNS=80 $stack exec -- shelltest --execdir -j16 tests -x /bin -x /addons