# The way this works is a little weird. But basically, the create-release job
# runs purely to initialize the GitHub release itself. Once done, the upload
# URL of the release is saved as an artifact.
#
# The build-release job runs only once create-release is finished. It gets
# the release upload URL by downloading the corresponding artifact (which was
# uploaded by create-release). It then builds the release executables for each
# supported platform and attaches them as release assets to the previously
# created release.
#
# The key here is that we create the release only once.

name: release
on:
  push:
    tags:
    - '*'
jobs:
  create-release:
    name: create-release
    runs-on: ubuntu-latest
    steps:
      - name: Create artifacts directory
        run: mkdir artifacts

      - name: Get the release version from the tag
        if: env.SL_VERSION == ''
        run: |
          # Apparently, this is the right way to get a tag name. Really?
          #
          # See: https://github.community/t5/GitHub-Actions/How-to-get-just-the-tag-name/m-p/32167/highlight/true#M1027
          echo "SL_VERSION=${GITHUB_REF#refs/tags/}" >> $GITHUB_ENV
          echo "version is: ${{ env.SL_VERSION }}"

      - name: Create GitHub release
        id: release
        uses: actions/create-release@v1
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        with:
          tag_name: ${{ env.SL_VERSION }}
          release_name: ${{ env.SL_VERSION }}

      - name: Save release upload URL to artifact
        run: echo "${{ steps.release.outputs.upload_url }}" > artifacts/release-upload-url

      - name: Save version number to artifact
        run: echo "${{ env.SL_VERSION }}" > artifacts/release-version

      - name: Upload artifacts
        uses: actions/upload-artifact@v1
        with:
          name: artifacts
          path: artifacts

  build-release:
    name: build-release
    needs: ['create-release']
    runs-on: ${{ matrix.os }}
    env:
      # For some builds, we use cross to test on 32-bit and big-endian
      # systems.
      CARGO: cargo
      # When CARGO is set to CROSS, this is set to `--target matrix.target`.
      TARGET_FLAGS:
      # When CARGO is set to CROSS, TARGET_DIR includes matrix.target.
      TARGET_DIR: ./target
      # Emit backtraces on panics.
      RUST_BACKTRACE: 1
    strategy:
      matrix:
        build: [linux, linux-arm, macos, macos-arm, win-msvc, win-gnu, win32-msvc]
        include:
        - build: linux
          os: ubuntu-18.04
          rust: stable
          target: x86_64-unknown-linux-musl
        - build: linux-arm
          os: ubuntu-18.04
          rust: stable
          target: arm-unknown-linux-gnueabihf
        - build: macos
          os: macos-latest
          rust: stable
          target: x86_64-apple-darwin
        - build: macos-arm
          os: macos-latest
          rust: stable
          target: aarch64-apple-darwin
        - build: win-msvc
          os: windows-2019
          rust: stable
          target: x86_64-pc-windows-msvc
        - build: win-msvc-msi
          os: windows-2019
          rust: stable
          target: x86_64-pc-windows-msvc
        - build: win-gnu
          os: windows-2019
          rust: stable-x86_64-gnu
          target: x86_64-pc-windows-gnu
        - build: win32-msvc
          os: windows-2019
          rust: stable
          target: i686-pc-windows-msvc

    steps:
    - name: Checkout repository
      uses: actions/checkout@v2
      with:
        fetch-depth: 1

    - name: Install packages (Ubuntu)
      if: matrix.os == 'ubuntu-18.04'
      run: |
        sudo apt-get update
        sudo apt-get install -y --no-install-recommends xz-utils liblz4-tool musl-tools

    - name: Install Rust
      uses: actions-rs/toolchain@v1
      with:
        toolchain: ${{ matrix.rust }}
        profile: minimal
        override: true
        target: ${{ matrix.target }}

    - name: Use Cross
      if: matrix.build != 'win-msvc-msi'
      run: |
        cargo install --version 0.2.4 cross
        echo "CARGO=cross" >> $GITHUB_ENV
        echo "TARGET_FLAGS=--target ${{ matrix.target }}" >> $GITHUB_ENV
        echo "TARGET_DIR=./target/${{ matrix.target }}" >> $GITHUB_ENV

    - name: Show command used for Cargo
      run: |
        echo "cargo command is: ${{ env.CARGO }}"
        echo "target flag is: ${{ env.TARGET_FLAGS }}"
        echo "target dir is: ${{ env.TARGET_DIR }}"

    - name: Get release download URL
      uses: actions/download-artifact@v1
      with:
        name: artifacts
        path: artifacts

    - name: Set release upload URL and release version
      shell: bash
      run: |
        release_upload_url="$(cat artifacts/release-upload-url)"
        echo "RELEASE_UPLOAD_URL=$release_upload_url" >> $GITHUB_ENV
        echo "release upload url: $RELEASE_UPLOAD_URL"
        release_version="$(cat artifacts/release-version)"
        echo "RELEASE_VERSION=$release_version" >> $GITHUB_ENV
        echo "release version: $RELEASE_VERSION"

    - name: Build release binary
      if: matrix.build != 'win-msvc-msi'
      run: ${{ env.CARGO }} build --verbose --release ${{ env.TARGET_FLAGS }}

    - name: Strip release binary (linux and macos)
      if: matrix.build == 'linux' || matrix.build == 'macos' || matrix.build == 'macos-arm'
      run: strip "target/${{ matrix.target }}/release/tre"

    - name: Strip release binary (arm)
      if: matrix.build == 'linux-arm'
      run: |
        docker run --rm -v \
          "$PWD/target:/target:Z" \
          rustembedded/cross:arm-unknown-linux-gnueabihf \
          arm-linux-gnueabihf-strip \
          /target/arm-unknown-linux-gnueabihf/release/tre

    - name: Build archive
      if: matrix.build != 'win-msvc-msi'
      shell: bash
      run: |
        outdir=${{ env.TARGET_DIR }}
        staging="tre-${{ env.RELEASE_VERSION }}-${{ matrix.target }}"

        if [ "${{ matrix.os }}" = "windows-2019" ]; then
          7z a "$staging.zip" "./target/release/tre.exe"
          echo "ASSET=$staging.zip" >> $GITHUB_ENV
        else
          tar -C "target/${{ matrix.target }}/release" -cf "$staging.tar" tre
          tar -C "manual" -rf "$staging.tar" tre.1
          gzip "$staging.tar"
          echo "ASSET=$staging.tar.gz" >> $GITHUB_ENV
        fi

    - name: Install wix
      if: matrix.build == 'win-msvc-msi'
      uses: actions-rs/install@v0.1
      with:
        crate: cargo-wix
        version: latest

    - name: Build .msi
      if: matrix.build == 'win-msvc-msi'
      shell: bash
      env:
        RUSTFLAGS: '-C target-feature=+crt-static'
      run: |
        outdir=${{ env.TARGET_DIR }}
        staging="tre-${{ env.RELEASE_VERSION }}-${{ matrix.target }}"

        cargo wix init
        cargo wix -v --nocapture -o $staging.msi
        echo "ASSET=$staging.msi" >> $GITHUB_ENV

    - name: Upload release archive
      uses: actions/upload-release-asset@v1.0.1
      env:
        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
      with:
        upload_url: ${{ env.RELEASE_UPLOAD_URL }}
        asset_path: ${{ env.ASSET }}
        asset_name: ${{ env.ASSET }}
        asset_content_type: application/octet-stream