name: Build

on:
  push:
    branches:
    - master
    tags:
    - '*'
  pull_request:
    branches:
    - master

defaults:
  run:
    shell: bash

env:
  # Cache issues can sometimes be fixed by incrementing this value.
  CACHE_KEY: 6

jobs:
  all:
    name: All

    strategy:
      matrix:
        os:
        - macos-latest
        - ubuntu-latest
        - windows-latest
        include:
        - os: ubuntu-latest
          target: x86_64-unknown-linux-musl
        - os: macos-latest
          target: x86_64-apple-darwin
        - os: windows-latest
          target: x86_64-pc-windows-msvc

    runs-on: ${{matrix.os}}

    env:
      RUSTFLAGS: --deny warnings

    steps:
    - uses: actions/checkout@v2
      with:
        fetch-depth: 0

    # An issue with BSD Tar causes sporadic failures on macOS.
    # c.f https://github.com/actions/cache/issues/403
    - name: Install GNU Tar
      if: matrix.os == 'macos-latest'
      run: |
        brew install gnu-tar
        echo /usr/local/opt/gnu-tar/libexec/gnubin > $GITHUB_PATH

    - name: Cache
      uses: actions/cache@v2
      with:
        path: |
          ~/.cargo/registry
          ~/.cargo/git
          target
        key: cargo-${{ env.CACHE_KEY }}-${{ runner.os }}-${{ hashFiles('**/Cargo.lock') }}

    - name: Install Rust Toolchain Components
      run: |
        rustup component add clippy rustfmt

    - name: Info
      run: |
        rustup --version
        cargo --version
        cargo clippy --version

    - name: Build
      run: cargo build --all

    - name: Test
      run: cargo test --all

    - name: Clippy
      run: cargo clippy --all-targets --all-features

    - name: Lint
      if: matrix.os == 'macos-latest'
      run: |
        brew install ripgrep
        ./bin/lint

    - name: Install Nightly
      uses: actions-rs/toolchain@v1
      with:
        toolchain: nightly
        target: ${{matrix.target}}
        profile: minimal
        components: rustfmt

    - name: Check Formatting
      run: cargo +nightly fmt --all -- --check

    - name: Check Generated
      if: matrix.os == 'macos-latest'
      run: |
        brew install help2man
        cargo run --package gen -- --bin target/debug/imdl all --no-changelog
        git diff --no-ext-diff --exit-code

    - name: Install `mdbook`
      if: matrix.os != 'windows-latest'
      uses: peaceiris/actions-mdbook@v1
      with:
        mdbook-version: latest

    - name: Build Book
      if: matrix.os != 'windows-latest'
      run: |
        cargo run --package gen -- --bin target/debug/imdl book --no-changelog
        mdbook build book --dest-dir ../www/book

    - name: Record Git Revision
      if: github.ref == 'refs/heads/master' && matrix.os == 'ubuntu-latest'
      run: git rev-parse --verify HEAD > www/head.txt

    - name: Deploy Pages
      uses: peaceiris/actions-gh-pages@v3
      if: github.ref == 'refs/heads/master' && matrix.os == 'ubuntu-latest'
      with:
        github_token: ${{secrets.GITHUB_TOKEN}}
        publish_branch: gh-pages
        publish_dir: ./www

    - name: Package
      id: package
      if: startsWith(github.ref, 'refs/tags/')
      run: ./bin/package ${{github.ref}} ${{matrix.os}} ${{matrix.target}}

    - name: Publish Release Archive
      uses: softprops/action-gh-release@v1
      if: startsWith(github.ref, 'refs/tags/')
      with:
        draft: false
        files: ${{steps.package.outputs.archive}}
        prerelease: ${{ ! startsWith(github.ref, 'refs/tags/v') }}
      env:
        GITHUB_TOKEN: ${{secrets.GITHUB_TOKEN}}