Initial commit

LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2024 eugene yokota
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

README.md

@@ -0,0 +1,68 @@
+Setup sbt
+=========
+
+This action enables `sbt` runner from GitHub Actions.
+
+Usage
+-----
+
+Here's an example usage of setup-sbt action.
+
+```yaml
+env:
+  JAVA_OPTS: -Xms2048M -Xmx2048M -Xss6M -XX:ReservedCodeCacheSize=256M -Dfile.encoding=UTF-8
+steps:
+- uses: actions/checkout@v4
+- name: Setup JDK
+  uses: actions/setup-java@v4
+  with:
+    distribution: temurin
+    java-version: 17
+    cache: sbt
+- uses: sbt/setup-sbt@v1
+- name: Build and test
+  shell: bash
+  run: sbt -v +test
+```
+
+`uses: sbt/setup-sbt@v1` makes `sbt` available on Linux, macOS, and Windows.
+
+### Setting the runner version
+
+The `sbt` runner (Bash script that launches sbt) is typically compatible with all modern sbt releases,
+you might want to pin the runner to a specific version.
+
+```yaml
+env:
+  JAVA_OPTS: -Xms2048M -Xmx2048M -Xss6M -XX:ReservedCodeCacheSize=256M -Dfile.encoding=UTF-8
+steps:
+- uses: actions/checkout@v4
+- name: Setup JDK
+  uses: actions/setup-java@v4
+  with:
+    distribution: temurin
+    java-version: 17
+    cache: sbt
+- uses: sbt/setup-sbt@v1
+  with:
+    sbt-runner-version: 1.9.9
+- name: Build and test
+  shell: bash
+  run: sbt -v +test
+```
+
+Why is this GitHub Action needed?
+---------------------------------
+
+The runner images on GitHub Action has long included `sbt` runner script. The [initial commit on actions/runner-images](https://github.com/actions/runner-images/pull/96) contains `images/linux/scripts/installers/sbt.sh`. However, the situation has changed in May 2024 when GitHub released the runner image for `macos-13` and `macos-14`, users noticed that they were missing the `sbt` runner script.
+
+[actions/runner-images#9369](https://github.com/actions/runner-images/issues/9369) and [actions/runner-images#9837](https://github.com/actions/runner-images/issues/9837) confirmed that this was intentional:
+
+> Thank you for such detail request. But currently we have no plans to add `sbt` on `macOS-13`/`macOS-14`.
+
+Since GitHub Actions are extensible, we thought this providing a setup action would be convenient way to enable `sbt` again on all runner images.
+
+License
+-------
+
+The scripts and documentation in this project are released under the [MIT License](LICENSE).

action.yml

@@ -0,0 +1,36 @@
+name: "Setup sbt"
+description: "Sets up sbt runner script"
+inputs:
+  sbt-runner-version:
+    description: "The runner version (The actual version is controlled via project/build.properties)"
+    required: true
+    default: 1.10.0
+runs:
+  using: "composite"
+  steps:
+    - name: Cache sbt distribution
+      id: cache-dir
+      uses: actions/cache@v4
+      with:
+        path: setupsbt
+        key: ${{ runner.os }}-sbt-${{ inputs.sbt-runner-version }}
+
+    - name: "Install sbt"
+      shell: bash
+      if: steps.cache-dir.outputs.cache-hit != 'true'
+      run: |
+        mkdir -p setupsbt
+        curl -sL https://github.com/sbt/sbt/releases/download/v$SBT_RUNNER_VERSION/sbt-$SBT_RUNNER_VERSION.zip > setupsbt/sbt-$SBT_RUNNER_VERSION.zip
+        pushd setupsbt
+        unzip -o "sbt-$SBT_RUNNER_VERSION.zip"
+        popd
+      env:
+        SBT_RUNNER_VERSION: ${{ inputs.sbt-runner-version }}
+
+    - name: "Setup PATH"
+      shell: bash
+      run: |
+        pushd setupsbt
+        ls sbt/bin/sbt
+        echo "$PWD/sbt/bin" >> "$GITHUB_PATH"
+        popd