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April 2, 2022 06:29 am GMT

Dart GitHub Actions: Publish your command-line tools for Windows/macOS/Linux into GitHub Releases

Motivation

Dart is very suitable for building quick-and-dirty CLI tools and share them among your collegue, since it produces a single binary with dart compile exe.

It would be useful if organization-internal tools are published in GitHub Releases like this:

Unfortunately, Dart doesn't support cross-compile at this moment and we have to compile the source code on each platform (Windows, macOS, Linux) before publishing the binaries, while Golang supports cross-compile and GoReleaser already made it easy to publish the binaries for each platform.

GitHub Actions provides Windows/macOS/Linux build environments for free and it would be really useful for compiling and publishing the CLI tools composed with Dart.

This article shows how to configure the GitHub Actions.

GitHub Actions for build

As many articles already says, only 4 step are required for compiling the Dart code.

- uses: actions/checkout@v2- uses: dart-lang/setup-dart@v1- run: dart pub get- run: dart compile exe bin/mycli.dart -o mycli

One point to consider is that the output binary should be named as mycli .exe on Windows and mycli (without extension) on macOS/Linux.
We can solve the naming by defining the matrix like below:

jobs:  compile:    name: dart compile exe    strategy:      matrix:        include:          - runs-on: ubuntu-latest            binary-name: mycli_linux_amd64          - runs-on: macos-latest            binary-name: mycli_macos_amd64          - runs-on: windows-latest            binary-name: mycli_windows.exe    runs-on: ${{ matrix.runs-on }}    steps:      - uses: actions/checkout@v2      - uses: dart-lang/setup-dart@v1      - run: dart pub get      - run: mkdir ${{ matrix.runs-on }}      - run: dart compile exe bin/mycli.dart -o ${{ matrix.runs-on }}/${{ matrix.binary-name }}

GitHub Actions for release

https://docs.github.com/en/rest/reference/releases

According to this reference, GitHub Release requires 2 steps for publishing some binaries:

Create a release resource
- POST https://api.github.com/repos/{owner}/{repo}/releases
Upload the binaries into the release
- POST https://uploads.github.com/repos/{owner}/{repo}/releases/{release_id}/assets

Use action-gh-release for simple uploading

action-gh-release really makes it easy to do these steps.

- uses: softprops/action-gh-release@v1  with:    draft: true    files: out/*

With this simple definition, GitHub Actions will upload all files in out/ into a new draft release.

    files: |      out/mycli_linux      out/mycli_macos      out/mycli_windows

Also files can be specified to individual file list instead of glob expression.

Combine the build process with the release process using artifact

Each of 3 build actions generate a binary and release process should upload them all at once. The flow can be implemented with GitHub artifact.

name: Publishon:  push:    tags:      - '[0-9]+.[0-9]+.[0-9]+'jobs:  compile:    name: dart compile exe    strategy:      matrix:        include:          - runs-on: ubuntu-latest            binary-name: mycli_linux_amd64          - runs-on: macos-latest            binary-name: mycli_macos_amd64          - runs-on: windows-latest            binary-name: mycli_windows.exe    runs-on: ${{ matrix.runs-on }}    steps:      - uses: actions/checkout@v2      - uses: dart-lang/setup-dart@v1      - run: dart pub get      - run: mkdir ${{ matrix.runs-on }}      - run: dart compile exe bin/mycli.dart -o ${{ matrix.runs-on }}/${{ matrix.binary-name }}      - uses: actions/upload-artifact@v2        with:          name: bin-${{ matrix.runs-on }}          path: ${{ matrix.runs-on }}  release:    needs: compile    name: github release    runs-on: ubuntu-latest    steps:      - uses: actions/download-artifact@v2        with:          name: bin-ubuntu-latest          path: bin-linux      - uses: actions/download-artifact@v2        with:          name: bin-macos-latest          path: bin-macos      - uses: actions/download-artifact@v2        with:          name: bin-windows-latest          path: bin-windows      - uses: softprops/action-gh-release@v1        with:          draft: true          files: bin-*/*

This works expectedly like below:

and the artifacts are successfully uploaded to GitHub Releases! :)

Original Link: https://dev.to/yusukeiwaki/dart-github-actions-publish-your-command-line-tools-for-windowsmacoslinux-into-github-releases-4hmn

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