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			135 lines
		
	
	
		
			3.9 KiB
		
	
	
	
		
			Markdown
		
	
	
	
	
	
			
		
		
	
	
			135 lines
		
	
	
		
			3.9 KiB
		
	
	
	
		
			Markdown
		
	
	
	
	
	
| # setup-go
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| 
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| [](https://github.com/actions/setup-go/actions/workflows/workflow.yml)
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| [](https://github.com/actions/setup-go/actions/workflows/versions.yml)
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| 
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| This action sets up a go environment for use in actions by:
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| 
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| - Optionally downloading and caching a version of Go by version and adding to `PATH`.
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| - Registering problem matchers for error output.
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| 
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| # V3
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| 
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| The V3 edition of the action offers:
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| 
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| - Adds `GOBIN` to the `PATH`
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| - Proxy support
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| - Check latest version
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| - Bug fixes (including issues around version matching and semver)
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| 
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| 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](https://github.com/actions/go-versions/blob/main/versions-manifest.json) repository. On miss or failure, it will fall back to downloading directly from [go dist](https://storage.googleapis.com/golang). To change the default behavior, please use the [check-latest input](#check-latest-version).
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| 
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| Matching by [semver spec](https://github.com/npm/node-semver):
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| 
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| ```yaml
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| steps:
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|   - uses: actions/checkout@v3
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|   - uses: actions/setup-go@v3
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|     with:
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|       go-version: '^1.13.1' # The Go version to download (if necessary) and use.
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|   - run: go version
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| ```
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| 
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| ```yaml
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| steps:
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|   - uses: actions/checkout@v3
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|   - uses: actions/setup-go@v3
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|     with:
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|       go-version: '>=1.17.0'
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|   - run: go version
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| ```
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| 
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| Matching an unstable pre-release:
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| 
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| ```yaml
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| steps:
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|   - uses: actions/checkout@v3
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|   - uses: actions/setup-go@v3
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|     with:
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|       go-version: '1.18.0-rc.1' # The Go version to download (if necessary) and use.
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|   - run: go version
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| ```
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| 
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| ```yaml
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| steps:
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|   - uses: actions/checkout@v3
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|   - uses: actions/setup-go@v3
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|     with:
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|       go-version: '1.16.0-beta.1' # The Go version to download (if necessary) and use.
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|   - run: go version
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| ```
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| 
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| # Usage
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| 
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| See [action.yml](action.yml)
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| 
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| ## Basic
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| 
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| ```yaml
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| steps:
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|   - uses: actions/checkout@v3
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|   - uses: actions/setup-go@v3
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|     with:
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|       go-version: '1.16.1' # The Go version to download (if necessary) and use.
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|   - run: go run hello.go
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| ```
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| 
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| 
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| ## Check latest version
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| 
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| 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.
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| 
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| 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.
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| 
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| > Setting `check-latest` to `true` has performance implications as downloading Go versions is slower than using cached versions.
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| 
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| ```yaml
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| steps:
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|   - uses: actions/checkout@v3
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|   - uses: actions/setup-go@v3
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|     with:
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|       go-version: '1.14'
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|       check-latest: true
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|   - run: go run hello.go
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| ```
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| 
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| ## Matrix testing
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| 
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| ```yaml
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| jobs:
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|   build:
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|     runs-on: ubuntu-latest
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|     strategy:
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|       matrix:
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|         go: [ '1.14', '1.13' ]
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|     name: Go ${{ matrix.go }} sample
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|     steps:
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|       - uses: actions/checkout@v3
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|       - name: Setup go
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|         uses: actions/setup-go@v3
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|         with:
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|           go-version: ${{ matrix.go }}
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|       - run: go run hello.go
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| ```
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| 
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| ### Supported version syntax
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| 
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| The `go-version` input supports the following syntax:
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| 
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| - Specific versions: `1.15`, `1.16.1`, `1.17.0-rc.2`, `1.16.0-beta.1`
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| - SemVer's version range syntax: `^1.13.1`, `>=1.18.0-rc.1`
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| 
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| For more information about semantic versioning, please refer to [semver](https://github.com/npm/node-semver) documentation.
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| 
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| # License
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| 
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| The scripts and documentation in this project are released under the [MIT License](LICENSE)
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| 
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| # Contributions
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| 
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| Contributions are welcome! See [Contributor's Guide](docs/contributors.md)
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| 
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| ## Code of Conduct
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| 
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| :wave: Be nice. See [our code of conduct](CONDUCT)
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