Skip to content
download

GitHub Action

setup-java

v6 Latest version
Use latest version
download

setup-java

Installs AdoptOpenJDK via Jabba

Installation

Copy and paste the following snippet into your .yml file.

- name: setup-java
  uses: olafurpg/setup-scala@v6
Learn more about this action in olafurpg/setup-scala
Choose a version

Setup Scala GitHub Action

A GitHub Action to install Java via Jabba and sbt.

  • Configurable Java version: supports OpenJDK, GraalVM, Zulu and any other Java version that's installable via Jabba.
  • The sbt command is installed using the paulp/sbt-extras launcher.
  • For faster startup, the csbt command is installed using the Coursier-based coursier/sbt-extras launcher. This launcher does not work with all builds, only use csbt if you know what you are doing.
  • Cross-platform: works on Linux, macOS, Windows.

Usage:

In your GitHub Actions workflow, add a uses: declaration before calling the sbt command.

+++ .github/workflows/ci.yml
  name: CI
  on:
    push:
  jobs:
    build:
      runs-on: ubuntu-latest
      steps:
      - uses: actions/checkout@v1
+     - uses: olafurpg/setup-scala@v5
      - name: Compile
        run: sbt compile

The default Java version is the latest OpenJDK 8 HotSpot version via AdoptOpenJDK. To customize the Java version add a with: declaration. For example, to use the latest AdoptOpenJDK 11 version

+++ .github/workflows/ci.yml
  name: CI
  on:
    push:
  jobs:
    build:
      runs-on: ubuntu-latest
      steps:
      - uses: actions/checkout@v1
      - uses: olafurpg/setup-scala@v5
+       with:
+         java-version: adopt@1.11
      - name: Compile
        run: sbt compile

More Java version examples:

  • graalvm@: the latest GraalVM
  • openjdk@1.14: the latest OpenJDK 14 version
  • zulu@1.11: the latest Zulu OpenJDK 11

Tips and tricks

Some suggestions that may be helpful when using GitHub Actions.

Disable fail-fast strategy

By default, GitHub Actions stops running jobs on the first failure. Add the following configuration to ensure that all jobs run on every PR even if one job fails.

+++ .github/workflows/ci.yml
  name: CI
  on: [push]
  jobs:
    build:
      runs-on: ubuntu-latest
+     strategy:
+       fail-fast: false
      steps:
      - uses: actions/checkout@v1
      - uses: olafurpg/setup-scala@v2
      - name: Compile
        run: sbt compile

Browsing raw logs

Searching through large logs in the GitHub Actions web UI can be slow sometimes. It can be faster to look at the raw logs instead.

Configuring Windows jobs

When running jobs on Windows, you may want to default to the bash shell and configure git to disable Windows line feeds.

+++ .github/workflows/ci.yml
  name: CI
  on: [push]
  jobs:
    build:
-     runs-on: ubuntu-latest
+     runs-on: windows-latest
      steps:
+     - name: Configure git
+       run: "git config --global core.autocrlf false"
+       shell: bash
      - uses: actions/checkout@v1
      - uses: olafurpg/setup-scala@v2
      - name: Compile
+       shell: bash
        run: sbt compile
You can’t perform that action at this time.