release.yml

# The way this works is the following:
#
# The create-release job runs purely to initialize the GitHub release itself
# and to output upload_url for the following job.
#
# The build-release job runs only once create-release is finished. It gets the
# release upload URL from create-release job outputs, 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.
#
# Reference:
# https://eugene-babichenko.github.io/blog/2020/05/09/github-actions-cross-platform-auto-releases/

name: release
on:
  push:
    # Enable when testing release infrastructure on a branch.
    # branches:
    # - ag/work
    tags:
      - "[0-9]+.[0-9]+.[0-9]+"

env:
  CARGO_TERM_COLOR: always

jobs:
  create-release:
    name: create-release
    runs-on: ubuntu-latest
    # env:
    # Set to force version number, e.g., when no tag exists.
    # AG_VERSION: TEST-0.0.0
    outputs:
      upload_url: ${{ steps.release.outputs.upload_url }}
      ag_version: ${{ env.AG_VERSION }}
    steps:
      - name: Get the release version from the tag
        shell: bash
        if: env.AG_VERSION == ''
        run: |
          # Apparently, this is the right way to get a tag name. Really?
          #
          # See: https://github.community/t5/GitHub-Actions/How-to-get-just-the-tag-name/m-p/32167/highlight/true#M1027
          echo "AG_VERSION=${GITHUB_REF#refs/tags/}" >> $GITHUB_ENV
          echo "version is: ${{ env.AG_VERSION }}"

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

  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, linux-aarch64, macos, macos-aarch64, win-msvc, win-gnu, win32-msvc]
        include:
          - build: linux
            os: ubuntu-18.04
            rust: nightly
            target: x86_64-unknown-linux-musl
          - build: linux-arm
            os: ubuntu-18.04
            rust: nightly
            target: arm-unknown-linux-gnueabihf
          - build: linux-aarch64
            os: ubuntu-18.04
            rust: nightly
            target: aarch64-unknown-linux-gnu
          - build: macos
            os: macos-latest
            rust: nightly
            target: x86_64-apple-darwin
          - build: macos-aarch64
            os: macos-latest
            rust: nightly
            target: aarch64-apple-darwin
          - build: win-msvc
            os: windows-2019
            rust: nightly
            target: x86_64-pc-windows-msvc
          - build: win-gnu
            os: windows-2019
            rust: nightly-x86_64-gnu
            target: x86_64-pc-windows-gnu
          - build: win32-msvc
            os: windows-2019
            rust: nightly
            target: i686-pc-windows-msvc

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

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

      - uses: Swatinem/rust-cache@v1

      - name: Use Cross
        shell: bash
        run: |
          cargo install 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: Build aarch64-unknown-linux-gnu
        if: matrix.build == 'linux-aarch64'
        run: |
          rustup target add aarch64-unknown-linux-gnu
          sudo apt-get update
          sudo apt-get install -yq gcc-aarch64-linux-gnu
          export CARGO_TARGET_AARCH64_UNKNOWN_LINUX_GNU_LINKER=/usr/bin/aarch64-linux-gnu-gcc
          cargo build --verbose --release ${{ env.TARGET_FLAGS }}
          echo "- Strip release binary (linux-aarch64)"
          aarch64-linux-gnu-strip "target/${{ matrix.target }}/release/ag"

      - name: Build release binary
        if: matrix.build != 'linux-aarch64'
        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-aarch64'
        run: strip "target/${{ matrix.target }}/release/ag"

      - 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/ag

      - name: Build archive
        shell: bash
        run: |
          staging="aget-rs-${{ needs.create-release.outputs.ag_version }}-${{ matrix.target }}"
          mkdir -p "$staging"
          cp {README.md,LICENSE-APACHE,LICENSE-MIT,CHANGELOG.md} "$staging/"
          if [ "${{ matrix.os }}" = "windows-2019" ]; then
            cp "target/${{ matrix.target }}/release/ag.exe" "$staging/"
            7z a "$staging.zip" "$staging"
            echo "ASSET=$staging.zip" >> $GITHUB_ENV
          else
            cp "target/${{ matrix.target }}/release/ag" "$staging/"
            tar czf "$staging.tar.gz" "$staging"
            echo "ASSET=$staging.tar.gz" >> $GITHUB_ENV
          fi

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