setup-go

This action sets up a go environment for use in actions by:

• optionally downloading and caching a version of Go by version and adding to PATH
• registering problem matchers for error output

V3

The V3 offers:

• Adds GOBIN to the PATH
• Proxy Support
• Check latest version
• Caching packages dependencies
• Bug Fixes (including issues around version matching and semver)

The action will first check the local cache for a version match. If a version is not found locally, it will pull it from the main branch of the go-versions repository. On miss or failure, it will fall back to downloading directly from go dist. To change the default behavior, please use the check-latest input.

Matching by semver spec:

steps:
  - uses: actions/checkout@v3
  - uses: actions/setup-go@v3
    with:
      go-version: '^1.13.1' # The Go version to download (if necessary) and use.
  - run: go version

steps:
  - uses: actions/checkout@v3
  - uses: actions/setup-go@v3
    with:
      go-version: '>=1.17.0'
  - run: go version

Matching an unstable pre-release:

steps:
  - uses: actions/checkout@v3
  - uses: actions/setup-go@v3
    with:
      go-version: '1.18.0-rc.1' # The Go version to download (if necessary) and use.
  - run: go version

steps:
  - uses: actions/checkout@v3
  - uses: actions/setup-go@v3
    with:
      go-version: '1.16.0-beta.1' # The Go version to download (if necessary) and use.
  - run: go version

Usage

See action.yml

Basic:

steps:
  - uses: actions/checkout@v3
  - uses: actions/setup-go@v3
    with:
      go-version: '1.16.1' # The Go version to download (if necessary) and use.
  - run: go run hello.go

Check latest version:

The check-latest flag defaults to false. Use the default or set check-latest to false if you prefer stability and if you want to ensure a specific Go version is always used.

If check-latest is set to true, the action first checks if the cached version is the latest one. If the locally cached version is not the most up-to-date, a Go version will then be downloaded. Set check-latest to true if you want the most up-to-date Go version to always be used.

Setting check-latest to true has performance implications as downloading Go versions is slower than using cached versions.

steps:
  - uses: actions/checkout@v3
  - uses: actions/setup-go@v3
    with:
      go-version: '1.14'
      check-latest: true
  - run: go run hello.go

Caching packages dependencies:

The action has a built-in functionality for caching and restoring dependencies. It uses actions/cache under the hood for caching dependencies but requires less configuration settings.The cache input is optional, and caching is turned off by default.

The action defaults to search for the dependency file - go.sum in the repository root, and uses its hash as a part of the cache key. Use cache-dependency-path input for cases when multiple dependency files are used, or they are located in different subdirectories.

Caching packages dependencies without specifying dependency file path

steps:
  - uses: actions/checkout@v3
  - uses: actions/setup-go@v3
    with:
      go-version: '1.17'
      check-latest: true
      cache: true
  - run: go run hello.go

Caching packages dependencies in monorepos

steps:
  - uses: actions/checkout@v3
  - uses: actions/setup-go@v3
    with:
      go-version: '1.17'
      check-latest: true
      cache: true
      cache-dependency-path: subdir/go.sum
  - run: go run hello.go

Matrix Testing:

jobs:
  build:
    runs-on: ubuntu-latest
    strategy:
      matrix:
        go: [ '1.14', '1.13' ]
    name: Go ${{ matrix.go }} sample
    steps:
      - uses: actions/checkout@v3
      - name: Setup go
        uses: actions/setup-go@v3
        with:
          go-version: ${{ matrix.go }}
      - run: go run hello.go

Supported version syntax

The go-version input supports the following syntax:

Specific versions: 1.15, 1.16.1, 1.17.0-rc.2, 1.16.0-beta.1
SemVer's version range syntax: ^1.13.1, >=1.18.0-rc.1 For more information about semantic versioning please refer semver documentation

License

The scripts and documentation in this project are released under the MIT License

Contributions

Contributions are welcome! See Contributor's Guide

Code of Conduct

👋 Be nice. See our code of conduct