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242 lines
12 KiB
Markdown
242 lines
12 KiB
Markdown
# Setup Java
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[](https://github.com/actions/setup-java/actions/workflows/workflow.yml)
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The `setup-java` 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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- Caching dependencies managed by sbt
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- [Maven Toolchains declaration](https://maven.apache.org/guides/mini/guide-using-toolchains.html) for specified JDK versions
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This action allows you to work with Java and Scala projects.
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## V2 vs V1
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- V2 supports custom distributions and provides support for Azul Zulu OpenJDK, Eclipse Temurin and AdoptOpenJDK out of the box. V1 supports only Azul Zulu OpenJDK
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- V2 requires you to specify distribution along with the version. V1 defaults to Azul 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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- `java-version`: The Java version that is going to be set up. Takes a whole or [semver](#supported-version-syntax) Java version. If not specified, the action will expect `java-version-file` input to be specified.
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- `java-version-file`: The path to the `.java-version` file. See more details in [about `.java-version` file](docs/advanced-usage.md#Java-version-file).
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- `distribution`: _(required)_ Java [distribution](#supported-distributions).
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- `java-package`: The packaging variant of the choosen distribution. Possible values: `jdk`, `jre`, `jdk+fx`, `jre+fx`. Default value: `jdk`.
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- `architecture`: The target architecture of the package. Possible values: `x86`, `x64`, `armv7`, `aarch64`, `ppc64le`. Default value: Derived from the runner machine.
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- `jdkFile`: If a use-case requires a custom distribution setup-java uses the compressed JDK from the location pointed by this input and will take care of the installation and caching on the VM.
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- `check-latest`: Setting this option makes the action to check for the latest available version for the version spec.
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- `cache`: Quick [setup caching](#caching-packages-dependencies) for the dependencies managed through one of the predifined package managers. It can be one of "maven", "gradle" or "sbt".
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#### Maven options
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The action has a bunch of inputs to generate maven's [settings.xml](https://maven.apache.org/settings.html) on the fly and pass the values to Apache Maven GPG Plugin as well as Apache Maven Toolchains. See [advanced usage](docs/advanced-usage.md) for more.
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- `overwrite-settings`: By default action overwrites the settings.xml. In order to skip generation of file if it exists set this to `false`.
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- `server-id`: ID of the distributionManagement repository in the pom.xml file. Default is `github`.
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- `server-username`: Environment variable name for the username for authentication to the Apache Maven repository. Default is GITHUB_ACTOR.
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- `server-password`: Environment variable name for password or token for authentication to the Apache Maven repository. Default is GITHUB_TOKEN.
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- `settings-path`: Maven related setting to point to the directory where the settings.xml file will be written. Default is ~/.m2.
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- `gpg-private-key`: GPG private key to import. Default is empty string.'
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- `gpg-passphrase`: description: 'Environment variable name for the GPG private key passphrase. Default is GPG_PASSPHRASE.
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- `mvn-toolchain-id`: Name of Maven Toolchain ID if the default name of `${distribution}_${java-version}` is not wanted.
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- `mvn-toolchain-vendor`: Name of Maven Toolchain Vendor if the default name of `${distribution}` is not wanted.
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### Basic Configuration
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#### Eclipse Temurin
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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-java@v3
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with:
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distribution: 'temurin' # See 'Supported distributions' for available options
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java-version: '17'
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- run: java HelloWorldApp.java
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```
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#### Azul Zulu OpenJDK
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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-java@v3
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with:
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distribution: 'zulu' # See 'Supported distributions' for available options
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java-version: '17'
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- run: java HelloWorldApp.java
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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`, `17`
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- more specific versions: `17.0`, `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` | Azul 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` | AdoptOpenJDK Hotspot | [Link](https://adoptopenjdk.net/) | [Link](https://adoptopenjdk.net/about.html) |
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| `adopt-openj9` | AdoptOpenJDK OpenJ9 | [Link](https://adoptopenjdk.net/) | [Link](https://adoptopenjdk.net/about.html) |
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| `liberica` | Liberica JDK | [Link](https://bell-sw.com/) | [Link](https://bell-sw.com/liberica_eula/) |
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| `microsoft` | Microsoft Build of OpenJDK | [Link](https://www.microsoft.com/openjdk) | [Link](https://docs.microsoft.com/java/openjdk/faq)
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| `corretto` | Amazon Corretto Build of OpenJDK | [Link](https://aws.amazon.com/corretto/) | [Link](https://aws.amazon.com/corretto/faqs/)
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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:** AdoptOpenJDK 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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**NOTE:** For Azul Zulu OpenJDK architectures x64 and arm64 are mapped to x86 / arm with proper hw_bitness.
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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, maven and sbt. The format of the used cache key is `setup-java-${{ platform }}-${{ packageManager }}-${{ fileHash }}`, where the hash is based on the following files:
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- gradle: `**/*.gradle*`, `**/gradle-wrapper.properties`, `buildSrc/**/Versions.kt`, `buildSrc/**/Dependencies.kt`, and `gradle/*.versions.toml`
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- maven: `**/pom.xml`
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- sbt: all sbt build definition files `**/*.sbt`, `**/project/build.properties`, `**/project/**.{scala,sbt}`
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The workflow output `cache-hit` is set to indicate if an exact match was found for the key [as actions/cache does](https://github.com/actions/cache/tree/main#outputs).
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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@v3
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- uses: actions/setup-java@v3
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with:
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distribution: 'temurin'
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java-version: '17'
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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@v3
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- uses: actions/setup-java@v3
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with:
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distribution: 'temurin'
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java-version: '17'
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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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#### Caching sbt dependencies
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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-java@v3
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with:
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distribution: 'temurin'
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java-version: '17'
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cache: 'sbt'
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- name: Build with SBT
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run: sbt package
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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@v3
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- uses: actions/setup-java@v3
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with:
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distribution: 'temurin'
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java-version: '17'
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check-latest: true
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- run: java HelloWorldApp.java
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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', '17' ]
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name: Java ${{ matrix.Java }} sample
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steps:
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- uses: actions/checkout@v3
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- name: Setup java
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uses: actions/setup-java@v3
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with:
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distribution: '<distribution>'
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java-version: ${{ matrix.java }}
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- run: java HelloWorldApp.java
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```
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### Install multiple JDKs
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All versions are added to the PATH. The last version will be used and available globally. Other Java versions can be accessed through env variables with such specification as 'JAVA_HOME_{{ MAJOR_VERSION }}_{{ ARCHITECTURE }}'.
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```yaml
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steps:
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- uses: actions/setup-java@v3
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with:
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distribution: '<distribution>'
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java-version: |
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8
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11
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15
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```
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### Using Maven Toolchains
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In the example above multiple JDKs are installed for the same job. The result after the last JDK is installed is a Maven Toolchains declaration containing references to all three JDKs. The values for `id`, `version`, and `vendor` of the individual Toolchain entries are the given input values for `distribution` and `java-version` (`vendor` being the combination of `${distribution}_${java-version}`) by default.
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### Advanced Configuration
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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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- [Liberica](docs/advanced-usage.md#Liberica)
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- [Microsoft](docs/advanced-usage.md#Microsoft)
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- [Amazon Corretto](docs/advanced-usage.md#Amazon-Corretto)
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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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- [Modifying Maven Toolchains](docs/advanced-usage.md#Modifying-Maven-Toolchains)
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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](docs/contributors.md)
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