153 lines
7.1 KiB
Markdown
153 lines
7.1 KiB
Markdown
# setup-java
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<p align="left">
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<a href="https://github.com/actions/setup-java"><img alt="GitHub Actions status" src="https://github.com/actions/setup-java/workflows/Main%20workflow/badge.svg"></a>
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</p>
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This action provides the following functionality for GitHub Actions runners:
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- Downloading and setting up a requested version of Java. See [Usage](#Usage) for a list of supported distributions
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- Extracting and caching custom version of Java from a local file
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- Configuring runner for publishing using Apache Maven
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- Configuring runner for publishing using Gradle
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- Configuring runner for using GPG private key
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- Registering problem matchers for error output
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- Caching dependencies managed by Apache Maven
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- Caching dependencies managed by Gradle
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## V2 vs V1
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- V2 supports custom distributions and provides support for Zulu OpenJDK, Eclipse Temurin and Adopt OpenJDK out of the box. V1 supports only Zulu OpenJDK
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- V2 requires you to specify distribution along with the version. V1 defaults to Zulu OpenJDK, only version input is required. Follow [the migration guide](docs/switching-to-v2.md) to switch from V1 to V2
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## Usage
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Inputs `java-version` and `distribution` are mandatory. See [Supported distributions](#supported-distributions) section for a list of available options.
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### Basic
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**Eclipse Temurin**
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```yaml
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steps:
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- uses: actions/checkout@v2
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- uses: actions/setup-java@v2
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with:
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distribution: 'temurin' # See 'Supported distributions' for available options
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java-version: '11'
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- run: java -cp java HelloWorldApp
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```
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**Zulu OpenJDK**
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```yaml
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steps:
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- uses: actions/checkout@v2
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- uses: actions/setup-java@v2
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with:
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distribution: 'zulu' # See 'Supported distributions' for available options
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java-version: '11'
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- run: java -cp java HelloWorldApp
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```
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#### Supported version syntax
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The `java-version` input supports an exact version or a version range using [SemVer](https://semver.org/) notation:
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- major versions: `8`, `11`, `16`
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- more specific versions: `11.0`, `11.0.4`, `8.0.232`, `8.0.282+8`
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- early access (EA) versions: `15-ea`, `15.0.0-ea`, `15.0.0-ea.2`, `15.0.0+2-ea`
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#### Supported distributions
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Currently, the following distributions are supported:
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| Keyword | Distribution | Official site | License
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| `temurin` | Eclipse Temurin | [Link](https://adoptium.net/) | [Link](https://adoptium.net/about.html)
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| `zulu` | Zulu OpenJDK | [Link](https://www.azul.com/downloads/zulu-community/?package=jdk) | [Link](https://www.azul.com/products/zulu-and-zulu-enterprise/zulu-terms-of-use/) |
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| `adopt` or `adopt-hotspot` | Adopt OpenJDK Hotspot | [Link](https://adoptopenjdk.net/) | [Link](https://adoptopenjdk.net/about.html) |
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| `adopt-openj9` | Adopt OpenJDK OpenJ9 | [Link](https://adoptopenjdk.net/) | [Link](https://adoptopenjdk.net/about.html)
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**NOTE:** The different distributors can provide discrepant list of available versions / supported configurations. Please refer to the official documentation to see the list of supported versions.
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**NOTE:** Adopt OpenJDK got moved to Eclipse Temurin and won't be updated anymore. It is highly recommended to migrate workflows from `adopt` to `temurin` to keep receiving software and security updates. See more details in the [Good-bye AdoptOpenJDK post](https://blog.adoptopenjdk.net/2021/08/goodbye-adoptopenjdk-hello-adoptium/).
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### Caching packages dependencies
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The action has a built-in functionality for caching and restoring dependencies. It uses [actions/cache](https://github.com/actions/cache) under hood for caching dependencies but requires less configuration settings. Supported package managers are gradle and maven. The cache input is optional, and caching is turned off by default.
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#### Caching gradle dependencies
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```yaml
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steps:
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- uses: actions/checkout@v2
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- uses: actions/setup-java@v2
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with:
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distribution: 'temurin'
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java-version: '11'
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cache: 'gradle'
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- run: ./gradlew build --no-daemon
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```
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#### Caching maven dependencies
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```yaml
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steps:
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- uses: actions/checkout@v2
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- uses: actions/setup-java@v2
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with:
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distribution: 'temurin'
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java-version: '11'
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cache: 'maven'
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- name: Build with Maven
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run: mvn -B package --file pom.xml
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```
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### Check latest
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In the basic examples above, the `check-latest` flag defaults to `false`. When set to `false`, the action tries to first resolve a version of Java from the local tool cache on the runner. If unable to find a specific version in the cache, the action will download a version of Java. Use the default or set `check-latest` to `false` if you prefer a faster more consistent setup experience that prioritizes trying to use the cached versions at the expense of newer versions sometimes being available for download.
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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, the latest version of Java will be downloaded. Set `check-latest` to `true` if you want the most up-to-date version of Java to always be used. Setting `check-latest` to `true` has performance implications as downloading versions of Java is slower than using cached versions.
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For Java distributions that are not cached on Hosted images, `check-latest` always behaves as `true` and downloads Java on-flight. Check out [Hosted Tool Cache](docs/advanced-usage.md#Hosted-Tool-Cache) for more details about pre-cached Java versions.
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```yaml
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steps:
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- uses: actions/checkout@v2
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- uses: actions/setup-java@v2
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with:
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distribution: 'adopt'
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java-version: '11'
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check-latest: true
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- run: java -cp java HelloWorldApp
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```
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### Testing against different Java versions
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```yaml
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jobs:
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build:
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runs-on: ubuntu-20.04
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strategy:
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matrix:
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java: [ '8', '11', '13', '15' ]
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name: Java ${{ matrix.Java }} sample
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steps:
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- uses: actions/checkout@v2
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- name: Setup java
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uses: actions/setup-java@v2
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with:
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distribution: '<distribution>'
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java-version: ${{ matrix.java }}
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- run: java -cp java HelloWorldApp
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```
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### Advanced
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- [Selecting a Java distribution](docs/advanced-usage.md#Selecting-a-Java-distribution)
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- [Eclipse Temurin](docs/advanced-usage.md#Eclipse-Temurin)
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- [Adopt](docs/advanced-usage.md#Adopt)
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- [Zulu](docs/advanced-usage.md#Zulu)
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- [Installing custom Java package type](docs/advanced-usage.md#Installing-custom-Java-package-type)
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- [Installing custom Java architecture](docs/advanced-usage.md#Installing-custom-Java-architecture)
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- [Installing custom Java distribution from local file](docs/advanced-usage.md#Installing-Java-from-local-file)
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- [Testing against different Java distributions](docs/advanced-usage.md#Testing-against-different-Java-distributions)
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- [Testing against different platforms](docs/advanced-usage.md#Testing-against-different-platforms)
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- [Publishing using Apache Maven](docs/advanced-usage.md#Publishing-using-Apache-Maven)
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- [Publishing using Gradle](docs/advanced-usage.md#Publishing-using-Gradle)
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- [Hosted Tool Cache](docs/advanced-usage.md#Hosted-Tool-Cache)
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## License
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The scripts and documentation in this project are released under the [MIT License](LICENSE).
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## Contributions
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Contributions are welcome! See [Contributor's Guide](CONTRIBUTING.md)
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