Drop deprecated windows-2016 build.

"The windows-2016 environment is deprecated and will be removed on March 15, 2022. Migrate to windows-latest instead. For more details see https://github.com/actions/virtual-environments/issues/4312"

.eslintignore

@@ -0,0 +1,4 @@
+dist/
+lib/
+node_modules/
+jest.config.js

.eslintrc.json

@@ -0,0 +1,55 @@
+{
+    "plugins": ["jest", "@typescript-eslint"],
+    "extends": ["plugin:github/recommended"],
+    "parser": "@typescript-eslint/parser",
+    "parserOptions": {
+      "ecmaVersion": 9,
+      "sourceType": "module",
+      "project": "./tsconfig.json"
+    },
+    "rules": {
+      "i18n-text/no-en": "off",
+      "eslint-comments/no-use": "off",
+      "import/no-namespace": "off",
+      "no-unused-vars": "off",
+      "@typescript-eslint/no-unused-vars": "error",
+      "@typescript-eslint/explicit-member-accessibility": ["error", {"accessibility": "no-public"}],
+      "@typescript-eslint/no-require-imports": "error",
+      "@typescript-eslint/array-type": "error",
+      "@typescript-eslint/await-thenable": "error",
+      "@typescript-eslint/ban-ts-comment": "error",
+      "camelcase": "off",
+      "@typescript-eslint/consistent-type-assertions": "error",
+      "@typescript-eslint/explicit-function-return-type": ["error", {"allowExpressions": true}],
+      "@typescript-eslint/func-call-spacing": ["error", "never"],
+      "@typescript-eslint/no-array-constructor": "error",
+      "@typescript-eslint/no-empty-interface": "error",
+      "@typescript-eslint/no-explicit-any": "error",
+      "@typescript-eslint/no-extraneous-class": "error",
+      "@typescript-eslint/no-for-in-array": "error",
+      "@typescript-eslint/no-inferrable-types": "error",
+      "@typescript-eslint/no-misused-new": "error",
+      "@typescript-eslint/no-namespace": "error",
+      "@typescript-eslint/no-non-null-assertion": "warn",
+      "@typescript-eslint/no-unnecessary-qualifier": "error",
+      "@typescript-eslint/no-unnecessary-type-assertion": "error",
+      "@typescript-eslint/no-useless-constructor": "error",
+      "@typescript-eslint/no-var-requires": "error",
+      "@typescript-eslint/prefer-for-of": "warn",
+      "@typescript-eslint/prefer-function-type": "warn",
+      "@typescript-eslint/prefer-includes": "error",
+      "@typescript-eslint/prefer-string-starts-ends-with": "error",
+      "@typescript-eslint/promise-function-async": "error",
+      "@typescript-eslint/require-array-sort-compare": "error",
+      "@typescript-eslint/restrict-plus-operands": "error",
+      "semi": "off",
+      "@typescript-eslint/semi": ["error", "never"],
+      "@typescript-eslint/type-annotation-spacing": "error",
+      "@typescript-eslint/unbound-method": "error"
+    },
+    "env": {
+      "node": true,
+      "es6": true,
+      "jest/globals": true
+    }
+  }

.gitattributes

@@ -0,0 +1 @@
+dist/** -diff linguist-generated=true 

.github/workflows/check-dist.yml

@@ -0,0 +1,51 @@
+# `dist/index.js` is a special file in Actions.
+# When you reference an action with `uses:` in a workflow,
+# `index.js` is the code that will run.
+# For our project, we generate this file through a build process from other source files.
+# We need to make sure the checked-in `index.js` actually matches what we expect it to be.
+name: Check dist/
+
+on:
+  push:
+    branches:
+      - main
+    paths-ignore:
+      - '**.md'
+  pull_request:
+    paths-ignore:
+      - '**.md'
+  workflow_dispatch:
+
+jobs:
+  check-dist:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Set Node.js 12.x
+        uses: actions/setup-node@v2.4.1
+        with:
+          node-version: 12.x
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Rebuild the dist/ directory
+        run: npm run build
+
+      - name: Compare the expected and actual dist/ directories
+        run: |
+          if [ "$(git diff --ignore-space-at-eol dist/ | wc -l)" -gt "0" ]; then
+            echo "Detected uncommitted changes after build.  See status below:"
+            git diff
+            exit 1
+          fi
+        id: diff
+
+      # If index.js was different than expected, upload the expected version as an artifact
+      - uses: actions/upload-artifact@v2
+        if: ${{ failure() && steps.diff.conclusion == 'failure' }}
+        with:
+          name: dist
+          path: dist/

.github/workflows/test.yml

@@ -0,0 +1,118 @@
+name: 'build-test'
+on: # rebuild any PRs and main branch changes
+  pull_request:
+  push:
+    branches:
+      - main
+      - 'releases/*'
+
+jobs:
+  build: # make sure build/ci work properly
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - run: |
+          npm install
+      - run: |
+          npm run all
+  test: # make sure the action works on a clean machine without building
+    name: ${{ matrix.version }} + JDK${{ matrix.java-version }} on ${{ matrix.os }}
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        version: [latest, dev, trunk]
+        java-version: ['11']
+        components: ['native-image']
+        os: [macos-latest, windows-latest, ubuntu-latest]
+        include:
+          - version: '21.3.0'
+            java-version: '17'
+            components: 'native-image'
+            os: ubuntu-18.04
+          - version: '21.3.0'
+            java-version: '17'
+            components: 'native-image'
+            os: macos-11
+          - version: '21.3.0'
+            java-version: '17'
+            components: 'native-image'
+            os: windows-2022
+          - version: 'mandrel-latest'
+            java-version: '11'
+            components: ''
+            os: ubuntu-latest
+          - version: 'mandrel-21.3.0.0-Final'
+            java-version: '17'
+            components: ''
+            os: windows-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: Run setup-graalvm action
+        uses: ./
+        with:
+          version: ${{ matrix.version }}
+          java-version: ${{ matrix.java-version }}
+          components: ${{ matrix.components }}
+          github-token: ${{ secrets.GITHUB_TOKEN }}
+      - name: Check environment
+        run: |
+          echo "GRAALVM_HOME: $GRAALVM_HOME"
+          echo "JAVA_HOME: $JAVA_HOME"
+          java --version
+          native-image --version
+        if: runner.os != 'Windows'
+      - name: Check Windows environment
+        run: |
+          echo "GRAALVM_HOME: $env:GRAALVM_HOME"
+          echo "JAVA_HOME: $env:JAVA_HOME"
+          java --version
+          native-image.cmd --version
+        if: runner.os == 'Windows'
+  test-additional:
+    name: Extensive tests on ubuntu-latest
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: Run setup-graalvm action
+        uses: ./
+        with:
+          version: 'latest'
+          java-version: '17'
+          components: 'espresso,llvm-toolchain,native-image,nodejs,python,R,ruby,wasm'
+          set-java-home: 'false'
+          github-token: ${{ secrets.GITHUB_TOKEN }}
+      - name: Check environment
+        run: |
+          echo "GRAALVM_HOME: $GRAALVM_HOME"
+          echo "JAVA_HOME: $JAVA_HOME"
+          [[ "$GRAALVM_HOME" != "$JAVA_HOME" ]] || exit 12
+          [[ $(which java) == *"graalvm"* ]] || exit 23
+          java --version
+          java -truffle --version
+          gu --version
+          gu list
+          [[ $(which lli) == *"graalvm"* ]] || exit 34
+          lli --version
+          native-image --version
+          [[ $(which node) == *"graalvm"* ]] || exit 45
+          node --version
+          graalpython --version
+          [[ $(which R) == *"graalvm"* ]] || exit 56
+          R --version
+          truffleruby --version
+          wasm --version
+      - name: Build HelloWorld.java with Native Image
+        run: |
+          echo 'public class HelloWorld { public static void main(String[] args) { System.out.println("Hello, World!"); } }' > HelloWorld.java
+          javac HelloWorld.java
+          native-image HelloWorld
+          ./helloworld
+      # [GR-36108]: Liquid does not build on TruffleRuby 
+      # - name: Build Shopify/liquid with TruffleRuby
+      #   run: |
+      #     [[ $(which bundle) == *"graalvm"* ]] || exit 57
+      #     git clone --depth 1 https://github.com/Shopify/liquid.git
+      #     pushd liquid > /dev/null
+      #     bundle install --jobs=3 --retry=3 --path=vendor/bundle
+      #     bundle exec rake
+      #     popd > /dev/null

.gitignore

@@ -0,0 +1,99 @@
+# Dependency directory
+node_modules
+
+# Rest pulled from https://github.com/github/gitignore/blob/master/Node.gitignore
+# Logs
+logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+lerna-debug.log*
+
+# Diagnostic reports (https://nodejs.org/api/report.html)
+report.[0-9]*.[0-9]*.[0-9]*.[0-9]*.json
+
+# Runtime data
+pids
+*.pid
+*.seed
+*.pid.lock
+
+# Directory for instrumented libs generated by jscoverage/JSCover
+lib-cov
+
+# Coverage directory used by tools like istanbul
+coverage
+*.lcov
+
+# nyc test coverage
+.nyc_output
+
+# Grunt intermediate storage (https://gruntjs.com/creating-plugins#storing-task-files)
+.grunt
+
+# Bower dependency directory (https://bower.io/)
+bower_components
+
+# node-waf configuration
+.lock-wscript
+
+# Compiled binary addons (https://nodejs.org/api/addons.html)
+build/Release
+
+# Dependency directories
+jspm_packages/
+
+# TypeScript v1 declaration files
+typings/
+
+# TypeScript cache
+*.tsbuildinfo
+
+# Optional npm cache directory
+.npm
+
+# Optional eslint cache
+.eslintcache
+
+# Optional REPL history
+.node_repl_history
+
+# Output of 'npm pack'
+*.tgz
+
+# Yarn Integrity file
+.yarn-integrity
+
+# dotenv environment variables file
+.env
+.env.test
+
+# parcel-bundler cache (https://parceljs.org/)
+.cache
+
+# next.js build output
+.next
+
+# nuxt.js build output
+.nuxt
+
+# vuepress build output
+.vuepress/dist
+
+# Serverless directories
+.serverless/
+
+# FuseBox cache
+.fusebox/
+
+# DynamoDB Local files
+.dynamodb/
+
+# OS metadata
+.DS_Store
+Thumbs.db
+
+# Ignore built ts files
+__tests__/runner/*
+lib/**/*

.prettierignore

@@ -0,0 +1,3 @@
+dist/
+lib/
+node_modules/

.prettierrc.json

@@ -0,0 +1,10 @@
+{
+  "printWidth": 80,
+  "tabWidth": 2,
+  "useTabs": false,
+  "semi": false,
+  "singleQuote": true,
+  "trailingComma": "none",
+  "bracketSpacing": false,
+  "arrowParens": "avoid"
+}

README.md

@@ -1 +1,117 @@
-# GitHub Action for GraalVM
+# GitHub Action for GraalVM [![build-test](https://github.com/graalvm/setup-graalvm/actions/workflows/test.yml/badge.svg)](https://github.com/graalvm/setup-graalvm/actions/workflows/test.yml)
+This GitHub action sets up [GraalVM Community Edition][repo] and GraalVM components such as [Native Image][native-image] and [GraalVM languages][graalvm-languages].
+
+## Key Features
+
+This action:
+
+- supports GraalVM CE [releases], [dev builds][dev-builds], and [Mandrel][mandrel] (see [options](#options))
+- has built-in support for GraalVM components and the [GraalVM updater][gu]
+- exports a `$GRAALVM_HOME` environment variable
+- adds `$GRAALVM_HOME/bin` to the `$PATH` environment variable<br>(GraalVM tools such as `gu` and GraalVM languages can be invoked directly)
+- sets `$JAVA_HOME` to `$GRAALVM_HOME` by default<br>(can be disabled via `set-java-home: 'false'`, see [options](#options))
+- sets up Windows environments with build tools using [vcvarsall.bat][vcvarsall]
+
+
+## Templates
+
+### Quickstart Template
+
+```yml
+name: GraalVM build
+on: [push, pull_request]
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: graalvm/setup-graalvm@v1
+        with:
+          version: 'latest'
+          java-version: '11'
+          components: 'native-image'
+          github-token: ${{ secrets.GITHUB_TOKEN }}
+      - name: Example step
+        run: |
+          echo "GRAALVM_HOME: $GRAALVM_HOME"
+          echo "JAVA_HOME: $JAVA_HOME"
+          java --version
+          gu --version
+          native-image --version
+```
+
+### Complex Native Image Template
+
+```yml
+name: GraalVM Native Image build
+on: [push, pull_request]
+jobs:
+  build:
+    name: ${{ matrix.version }} on ${{ matrix.os }}
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        version: [latest, dev, '21.3.0']
+        os: [macos-latest, windows-latest, ubuntu-latest]
+    steps:
+      - uses: actions/checkout@v2
+
+      - uses: graalvm/setup-graalvm@v1
+        with:
+          version: ${{ matrix.version }}
+          java-version: '11'
+          components: 'native-image'
+          github-token: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Build and run HelloWorld.java
+        run: |
+          javac HelloWorld.java
+          native-image HelloWorld
+          ./helloworld
+        if: runner.os != 'Windows'
+      
+      - name: Build and run HelloWorld.java on Windows
+        run: |
+          javac.exe HelloWorld.java
+          native-image.cmd HelloWorld
+          ./helloworld.exe
+        if: runner.os == 'Windows'
+      
+      - name: Upload binary
+        uses: actions/upload-artifact@v2
+        with:
+          name: helloworld-${{ matrix.os }}-${{ matrix.version }}
+          path: helloworld*
+```
+
+
+## Options
+
+| Name            | Default  | Description |
+|-----------------|:--------:|-------------|
+| `version`<br>*(required)* | n/a | `X.Y.Z` (e.g., `22.0.0`) for a specific [GraalVM release][releases]<br>`latest` for [latest stable release][stable],<br>`dev` for [latest dev build][dev-build],<br>`mandrel-X.Y.Z` (e.g., `mandrel-21.3.0.0-Final`) for a specific [Mandrel release][mandrel-releases], or<br>`mandrel-latest` for [latest Mandrel stable release][mandrel-stable]. |
+| `java-version`<br>*(required)* | n/a | `'11'` or `'17'` for a specific Java version.<br>(`'8'` and `'16'` are supported for GraalVM 21.2 and earlier.) |
+| `components`    | `''`     | Comma-spearated list of GraalVM components (e.g., `native-image` or `ruby,nodejs`) that will be installed by the [GraalVM Updater][gu]. |
+| `github-token`  | `''`     | Token for communication with the GitHub API. Please set to `${{ secrets.GITHUB_TOKEN }}` (see [templates](#templates)) to allow the action to authenticate with the GitHub API, which helps to reduce rate limiting issues. |
+| `set-java-home` | `'true'` | If set to `'true'`, instructs the action to set `$JAVA_HOME` to the path of the GraalVM installation. |
+
+## Contributing
+
+We welcome code contributions. To get started, you will need to sign the [Oracle Contributor Agreement][oca] (OCA).
+
+Only pull requests from committers that can be verified as having signed the OCA can be accepted.
+
+
+[dev-build]: https://github.com/graalvm/graalvm-ce-dev-builds/releases/latest
+[dev-builds]: https://github.com/graalvm/graalvm-ce-dev-builds
+[graalvm-languages]: https://www.graalvm.org/reference-manual/languages/
+[gu]: https://www.graalvm.org/reference-manual/graalvm-updater/
+[mandrel]: https://github.com/graalvm/mandrel
+[mandrel-releases]: https://github.com/graalvm/mandrel/releases
+[mandrel-stable]: https://github.com/graalvm/mandrel/releases/latest
+[native-image]: https://www.graalvm.org/native-image/
+[oca]: https://oca.opensource.oracle.com
+[releases]: https://github.com/graalvm/graalvm-ce-builds/releases
+[repo]: https://github.com/oracle/graal
+[stable]: https://github.com/graalvm/graalvm-ce-builds/releases/latest
+[vcvarsall]: https://docs.microsoft.com/en-us/cpp/build/building-on-the-command-line

__tests__/main.test.ts

@@ -0,0 +1,5 @@
+import {expect, test} from '@jest/globals'
+
+test('dummy test', async () => {
+  expect(true).toBeTruthy()
+})

action.yml

@@ -0,0 +1,28 @@
+name: 'GitHub Action for GraalVM'
+description: 'Set up a specific version of GraalVM Community Edition'
+author: 'GraalVM Developers'
+branding:
+  icon: 'terminal'  
+  color: 'blue'
+inputs:
+  version:
+    required: true
+    description: 'GraalVM version (release, latest, dev, trunk).'
+  java-version:
+    required: true
+    description: 'Java version (11 or 17, 8 or 16 for older releases).'
+  components:
+    required: false
+    description: 'Comma-separated list of GraalVM components to be installed'
+    default: ''
+  github-token:
+    required: false
+    description: 'Set it to secrets.GITHUB_TOKEN to increase rate limits when accessing the GitHub API'
+    default: ''
+  set-java-home:
+    required: false
+    description: 'Set $JAVA_HOME to the GraalVM installation. Default: true'
+    default: 'true'
+runs:
+  using: 'node12'
+  main: 'dist/index.js'

dist/licenses.txt

@@ -0,0 +1,668 @@
+@actions/core
+MIT
+The MIT License (MIT)
+
+Copyright 2019 GitHub
+
+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.
+
+@actions/exec
+MIT
+The MIT License (MIT)
+
+Copyright 2019 GitHub
+
+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.
+
+@actions/http-client
+MIT
+Actions Http Client for Node.js
+
+Copyright (c) GitHub, Inc.
+
+All rights reserved.
+
+MIT License
+
+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.
+
+
+@actions/io
+MIT
+The MIT License (MIT)
+
+Copyright 2019 GitHub
+
+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.
+
+@actions/tool-cache
+MIT
+The MIT License (MIT)
+
+Copyright 2019 GitHub
+
+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.
+
+@octokit/auth-token
+MIT
+The MIT License
+
+Copyright (c) 2019 Octokit contributors
+
+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.
+
+
+@octokit/core
+MIT
+The MIT License
+
+Copyright (c) 2019 Octokit contributors
+
+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,
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+MIT
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+BSD-2-Clause
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+ISC
+The ISC License
+
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jest.config.js

@@ -0,0 +1,9 @@
+module.exports = {
+  clearMocks: true,
+  moduleFileExtensions: ['js', 'ts'],
+  testMatch: ['**/*.test.ts'],
+  transform: {
+    '^.+\\.ts$': 'ts-jest'
+  },
+  verbose: true
+}

package.json

@@ -0,0 +1,50 @@
+{
+  "name": "setup-graalvm",
+  "version": "1.0.0",
+  "private": true,
+  "description": "GitHub Action for GraalVM",
+  "main": "lib/main.js",
+  "scripts": {
+    "build": "tsc",
+    "format": "prettier --write '**/*.ts'",
+    "format-check": "prettier --check '**/*.ts'",
+    "lint": "eslint src/**/*.ts",
+    "package": "ncc build --source-map --license licenses.txt",
+    "test": "jest",
+    "all": "npm run build && npm run format && npm run lint && npm run package && npm test"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/graalvm/setup-graalvm.git"
+  },
+  "keywords": [
+    "graalvm",
+    "native image",
+    "actions",
+    "setup"
+  ],
+  "author": "GraalVM Developers",
+  "license": "UPL",
+  "dependencies": {
+    "@actions/core": "^1.6.0",
+    "@actions/exec": "^1.1.0",
+    "@actions/http-client": "^1.0.11",
+    "@actions/io": "^1.1.1",
+    "@actions/tool-cache": "^1.7.1",
+    "@octokit/core": "^3.5.1",
+    "@octokit/types": "^6.34.0"
+  },
+  "devDependencies": {
+    "@types/node": "^17.0.6",
+    "@typescript-eslint/parser": "^5.8.1",
+    "@vercel/ncc": "^0.33.1",
+    "eslint": "^8.6.0",
+    "eslint-plugin-github": "^4.3.5",
+    "eslint-plugin-jest": "^25.3.4",
+    "jest": "^27.4.5",
+    "js-yaml": "^4.1.0",
+    "prettier": "2.5.1",
+    "ts-jest": "^27.1.2",
+    "typescript": "^4.5.4"
+  }
+}

src/constants.ts

@@ -0,0 +1,21 @@
+import * as otypes from '@octokit/types'
+import {homedir} from 'os'
+import {join} from 'path'
+
+export const IS_MACOS = process.platform === 'darwin'
+export const IS_WINDOWS = process.platform === 'win32'
+
+export const VERSION_DEV = 'dev'
+export const VERSION_LATEST = 'latest'
+export const VERSION_TRUNK = 'trunk'
+
+export const GRAALVM_BASE = join(homedir(), '.graalvm')
+export const GRAALVM_FILE_EXTENSION = IS_WINDOWS ? '.zip' : '.tar.gz'
+export const GRAALVM_GH_USER = 'graalvm'
+export const GRAALVM_PLATFORM = IS_WINDOWS ? 'windows' : process.platform
+export const JDK_HOME_SUFFIX = IS_MACOS ? '/Contents/Home' : ''
+
+export const MANDREL_NAMESPACE = 'mandrel-'
+
+export type LatestReleaseResponse =
+  otypes.Endpoints['GET /repos/{owner}/{repo}/releases/latest']['response']

src/dependencies.ts

@@ -0,0 +1,33 @@
+import * as core from '@actions/core'
+import {GRAALVM_PLATFORM} from './constants'
+import {exec} from '@actions/exec'
+
+const APT_GET_INSTALL_BASE = 'sudo apt-get -y --no-upgrade install'
+const COMPONENT_TO_DEPS = new Map<string, Map<string, string>>([
+  [
+    'linux',
+    new Map<string, string>([
+      ['nodejs', `${APT_GET_INSTALL_BASE} g++ make`],
+      ['ruby', `${APT_GET_INSTALL_BASE} make gcc libssl-dev libz-dev`],
+      [
+        'R',
+        `${APT_GET_INSTALL_BASE} libgomp1 build-essential gfortran libxml2 libc++-dev`
+      ]
+    ])
+  ],
+  ['darwin', new Map<string, string>([['ruby', 'brew install openssl']])]
+])
+
+export async function setUpDependencies(components: string[]): Promise<void> {
+  const platformDeps = COMPONENT_TO_DEPS.get(GRAALVM_PLATFORM)
+  if (platformDeps) {
+    for (const component of components) {
+      const depCommand = platformDeps.get(component)
+      if (depCommand) {
+        core.startGroup(`Installing dependencies for ${component}...`)
+        await exec(depCommand)
+        core.endGroup()
+      }
+    }
+  }
+}

src/graalvm-trunk.ts

@@ -0,0 +1,104 @@
+import * as c from './constants'
+import * as core from '@actions/core'
+import * as tc from '@actions/tool-cache'
+import {SpawnSyncOptionsWithStringEncoding, spawnSync} from 'child_process'
+import {mkdirP, mv} from '@actions/io'
+import {findJavaHomeInSubfolder} from './utils'
+import {join} from 'path'
+
+const GRAALVM_TRUNK_DL =
+  'https://github.com/oracle/graal/archive/refs/heads/master.zip'
+const GRAALVM_MX_DL =
+  'https://github.com/graalvm/mx/archive/refs/heads/master.zip'
+const DEFAULT_SUITES = '/compiler,/regex,/sdk,/tools,/truffle'
+const GRAAL_REPO_DIR = join(c.GRAALVM_BASE, 'graal')
+const VM_DIR = join(GRAAL_REPO_DIR, 'vm')
+const MX_DIR = join(c.GRAALVM_BASE, 'mx')
+const MX_EXEC = c.IS_WINDOWS ? 'mx.cmd' : 'mx'
+const SPAWN_OPTIONS: SpawnSyncOptionsWithStringEncoding = {
+  cwd: VM_DIR,
+  encoding: 'utf8',
+  stdio: 'inherit'
+}
+
+const COMPONENTS_TO_SUITE_NAME = new Map<string, string>([
+  ['espresso', '/espresso'],
+  ['js', '/graal-js'],
+  ['llvm-toolchain', '/sulong'],
+  ['native-image', '/substratevm'],
+  ['nodejs', '/graal-nodejs'],
+  ['python', 'graalpython'],
+  ['R', 'fastr'],
+  ['ruby', 'truffleruby'],
+  ['wasm', '/wasm']
+])
+
+export async function setUpGraalVMTrunk(
+  javaVersion: string,
+  components: string[]
+): Promise<string> {
+  const jdkId = `labsjdk-ce-${javaVersion}`
+
+  core.startGroup(`Downloading GraalVM sources, mx, and ${jdkId}...`)
+
+  await tc.extractZip(await tc.downloadTool(GRAALVM_TRUNK_DL), c.GRAALVM_BASE)
+  await mv(join(c.GRAALVM_BASE, 'graal-master'), GRAAL_REPO_DIR)
+
+  await tc.extractZip(await tc.downloadTool(GRAALVM_MX_DL), c.GRAALVM_BASE)
+  await mv(join(c.GRAALVM_BASE, 'mx-master'), MX_DIR)
+  core.addPath(MX_DIR)
+  core.debug(`"${MX_DIR}" added to $PATH`)
+
+  const labsJDKDir = join(c.GRAALVM_BASE, 'labsjdk')
+  await mkdirP(labsJDKDir)
+  spawnSync(
+    MX_EXEC,
+    ['--java-home=', 'fetch-jdk', '--jdk-id', jdkId, '--to', labsJDKDir],
+    SPAWN_OPTIONS
+  )
+  const labsJDKHome = findJavaHomeInSubfolder(labsJDKDir)
+  core.exportVariable('JAVA_HOME', labsJDKHome)
+  core.debug(`$JAVA_HOME set to "${labsJDKHome}"`)
+
+  core.endGroup()
+
+  const dynamicImports = toSuiteNames(components).join(',')
+  const mxArgs = [
+    '--no-download-progress', // avoid cluttering the build log
+    '--disable-installables=true', // installables not needed
+    '--force-bash-launchers=true', // disable native launchers
+    '--disable-libpolyglot', // avoid building libpolyglot to save time
+    '--exclude-components=LibGraal', // avoid building libgraal to save time
+    '--dynamicimports',
+    dynamicImports
+  ]
+  if (core.isDebug()) {
+    spawnSync(MX_EXEC, mxArgs.concat('graalvm-show'), SPAWN_OPTIONS)
+  }
+  const graalvmHome = spawnSync(MX_EXEC, mxArgs.concat(['graalvm-home']), {
+    ...SPAWN_OPTIONS,
+    stdio: 'pipe'
+  })
+  core.startGroup('Building GraalVM CE from source...')
+  spawnSync(MX_EXEC, mxArgs.concat(['build']), SPAWN_OPTIONS)
+  core.endGroup()
+  const graalvmHomePath = graalvmHome.stdout.trim()
+  if (core.isDebug()) {
+    const cmd = c.IS_WINDOWS ? 'dir' : 'ls'
+    spawnSync(cmd, [graalvmHomePath], {stdio: 'inherit'})
+  }
+  return graalvmHomePath
+}
+
+function toSuiteNames(components: string[]): string[] {
+  const names = [DEFAULT_SUITES]
+  for (const component of components) {
+    const suiteName = COMPONENTS_TO_SUITE_NAME.get(component)
+    if (suiteName) {
+      names.push(suiteName)
+    } else {
+      throw new Error(`Unsupported component: ${component}`)
+    }
+  }
+  return names
+}

src/graalvm.ts

@@ -0,0 +1,51 @@
+import * as c from './constants'
+import {downloadAndExtractJDK, getLatestRelease} from './utils'
+
+const GRAALVM_CE_DL_BASE =
+  'https://github.com/graalvm/graalvm-ce-builds/releases/download'
+const GRAALVM_REPO_DEV_BUILDS = 'graalvm-ce-dev-builds'
+const GRAALVM_REPO_RELEASES = 'graalvm-ce-builds'
+const GRAALVM_TAG_PREFIX = 'vm-'
+
+export async function setUpGraalVMLatest(javaVersion: string): Promise<string> {
+  const latestRelease = await getLatestRelease(GRAALVM_REPO_RELEASES)
+  const tag_name = latestRelease.tag_name
+  if (tag_name.startsWith(GRAALVM_TAG_PREFIX)) {
+    const latestVersion = tag_name.substring(
+      GRAALVM_TAG_PREFIX.length,
+      tag_name.length
+    )
+    return setUpGraalVMRelease(latestVersion, javaVersion)
+  }
+  throw new Error(`Could not find latest GraalVM release: ${tag_name}`)
+}
+
+export async function setUpGraalVMDevBuild(
+  javaVersion: string
+): Promise<string> {
+  const latestDevBuild = await getLatestRelease(GRAALVM_REPO_DEV_BUILDS)
+  const graalVMIdentifier = determineGraalVMIdentifier('dev', javaVersion)
+  const expectedFileName = `${graalVMIdentifier}${c.GRAALVM_FILE_EXTENSION}`
+  for (const asset of latestDevBuild.assets) {
+    if (asset.name === expectedFileName) {
+      return downloadAndExtractJDK(asset.browser_download_url)
+    }
+  }
+  throw new Error('Could not find GraalVM dev build')
+}
+
+export async function setUpGraalVMRelease(
+  version: string,
+  javaVersion: string
+): Promise<string> {
+  const graalVMIdentifier = determineGraalVMIdentifier(version, javaVersion)
+  const downloadUrl = `${GRAALVM_CE_DL_BASE}/${GRAALVM_TAG_PREFIX}${version}/${graalVMIdentifier}${c.GRAALVM_FILE_EXTENSION}`
+  return downloadAndExtractJDK(downloadUrl)
+}
+
+function determineGraalVMIdentifier(
+  version: string,
+  javaVersion: string
+): string {
+  return `graalvm-ce-java${javaVersion}-${c.GRAALVM_PLATFORM}-amd64-${version}`
+}

src/gu.ts

@@ -0,0 +1,38 @@
+import {GRAALVM_PLATFORM} from './constants'
+import {exec} from '@actions/exec'
+import {join} from 'path'
+
+const COMPONENT_TO_POST_INSTALL_HOOK = new Map<string, Map<string, string>>([
+  [
+    'linux',
+    new Map<string, string>([
+      ['ruby', 'languages/ruby/lib/truffle/post_install_hook.sh']
+      // ['R', 'languages/R/bin/configure_fastr'] (GR-36105: cannot be run non-interactively)
+    ])
+  ],
+  [
+    'darwin',
+    new Map<string, string>([
+      ['ruby', 'languages/ruby/lib/truffle/post_install_hook.sh']
+      // ['R', 'languages/R/bin/configure_fastr'] (GR-36105: cannot be run non-interactively)
+    ])
+  ]
+  // No post install hooks for Windows (yet)
+])
+
+export async function setUpGUComponents(
+  graalVMHome: string,
+  components: string[]
+): Promise<void> {
+  await exec('gu', ['install', '--no-progress'].concat(components))
+
+  const platformHooks = COMPONENT_TO_POST_INSTALL_HOOK.get(GRAALVM_PLATFORM)
+  if (platformHooks) {
+    for (const component of components) {
+      const postInstallHook = platformHooks.get(component)
+      if (postInstallHook) {
+        await exec(`"${join(graalVMHome, postInstallHook)}"`)
+      }
+    }
+  }
+}

src/main.ts

@@ -0,0 +1,80 @@
+import * as c from './constants'
+import * as core from '@actions/core'
+import * as graalvm from './graalvm'
+import {join} from 'path'
+import {mkdirP} from '@actions/io'
+import {setUpDependencies} from './dependencies'
+import {setUpGUComponents} from './gu'
+import {setUpGraalVMTrunk} from './graalvm-trunk'
+import {setUpMandrel} from './mandrel'
+import {setUpWindowsEnvironment} from './msvc'
+
+async function run(): Promise<void> {
+  try {
+    const graalvmVersion: string = core.getInput('version', {required: true})
+    const javaVersion: string = core.getInput('java-version', {required: true})
+    const componentsString: string = core.getInput('components')
+    const components: string[] =
+      componentsString.length > 0 ? componentsString.split(',') : []
+    const setJavaHome = core.getInput('set-java-home') === 'true'
+
+    if (c.IS_WINDOWS) {
+      setUpWindowsEnvironment()
+    }
+    setUpDependencies(components)
+
+    await mkdirP(c.GRAALVM_BASE)
+
+    // Download or build GraalVM
+    let graalVMHome
+    switch (graalvmVersion) {
+      case c.VERSION_LATEST:
+        graalVMHome = await graalvm.setUpGraalVMLatest(javaVersion)
+        break
+      case c.VERSION_DEV:
+        graalVMHome = await graalvm.setUpGraalVMDevBuild(javaVersion)
+        break
+      case c.VERSION_TRUNK:
+        core.warning(
+          "Building GraalVM from source is deprecated and will be removed on Jan 10, 2022. Please use the latest dev build instead (version: 'dev'). For more details see https://github.com/graalvm/setup-graalvm/issues/3"
+        )
+        graalVMHome = await setUpGraalVMTrunk(javaVersion, components)
+        break
+      default:
+        if (graalvmVersion.startsWith(c.MANDREL_NAMESPACE)) {
+          graalVMHome = await setUpMandrel(graalvmVersion, javaVersion)
+        } else {
+          graalVMHome = await graalvm.setUpGraalVMRelease(
+            graalvmVersion,
+            javaVersion
+          )
+        }
+        break
+    }
+
+    // Activate GraalVM
+    core.debug(`Activating GraalVM located at '${graalVMHome}'...`)
+    core.exportVariable('GRAALVM_HOME', graalVMHome)
+    core.addPath(join(graalVMHome, 'bin'))
+    if (setJavaHome) {
+      core.exportVariable('JAVA_HOME', graalVMHome)
+    }
+
+    // Set up GraalVM components (if any)
+    if (components.length > 0) {
+      if (graalvmVersion === c.VERSION_TRUNK) {
+        // components built from source, nothing to do
+      } else if (graalvmVersion.startsWith(c.MANDREL_NAMESPACE)) {
+        core.warning(
+          `Mandrel does not support GraalVM components: ${componentsString}`
+        )
+      } else {
+        await setUpGUComponents(graalVMHome, components)
+      }
+    }
+  } catch (error) {
+    if (error instanceof Error) core.setFailed(error.message)
+  }
+}
+
+run()

src/mandrel.ts

@@ -0,0 +1,57 @@
+import * as c from './constants'
+import {downloadAndExtractJDK, getLatestRelease} from './utils'
+
+const MANDREL_REPO = 'mandrel'
+const MANDREL_TAG_PREFIX = c.MANDREL_NAMESPACE
+const MANDREL_DL_BASE = 'https://github.com/graalvm/mandrel/releases/download'
+
+export async function setUpMandrel(
+  graalvmVersion: string,
+  javaVersion: string
+): Promise<string> {
+  const mandrelVersion = graalvmVersion.substring(
+    c.MANDREL_NAMESPACE.length,
+    graalvmVersion.length
+  )
+
+  let mandrelHome
+  switch (mandrelVersion) {
+    case 'latest':
+      mandrelHome = await setUpMandrelLatest(javaVersion)
+      break
+    default:
+      mandrelHome = await setUpMandrelRelease(mandrelVersion, javaVersion)
+      break
+  }
+
+  return mandrelHome
+}
+
+async function setUpMandrelLatest(javaVersion: string): Promise<string> {
+  const latestRelease = await getLatestRelease(MANDREL_REPO)
+  const tag_name = latestRelease.tag_name
+  if (tag_name.startsWith(MANDREL_TAG_PREFIX)) {
+    const latestVersion = tag_name.substring(
+      MANDREL_TAG_PREFIX.length,
+      tag_name.length
+    )
+    return setUpMandrelRelease(latestVersion, javaVersion)
+  }
+  throw new Error(`Could not find latest Mandrel release: ${tag_name}`)
+}
+
+async function setUpMandrelRelease(
+  version: string,
+  javaVersion: string
+): Promise<string> {
+  const identifier = determineMandrelIdentifier(version, javaVersion)
+  const downloadUrl = `${MANDREL_DL_BASE}/${MANDREL_TAG_PREFIX}${version}/${identifier}${c.GRAALVM_FILE_EXTENSION}`
+  return downloadAndExtractJDK(downloadUrl)
+}
+
+function determineMandrelIdentifier(
+  version: string,
+  javaVersion: string
+): string {
+  return `mandrel-java${javaVersion}-${c.GRAALVM_PLATFORM}-amd64-${version}`
+}

src/msvc.ts

@@ -0,0 +1,60 @@
+import * as core from '@actions/core'
+import {execSync} from 'child_process'
+import {existsSync} from 'fs'
+
+// Keep in sync with https://github.com/actions/virtual-environments
+const KNOWN_VISUAL_STUDIO_INSTALLATIONS = [
+  'C:\\Program Files (x86)\\Microsoft Visual Studio\\2017\\Enterprise', // 'windows-2016'
+  'C:\\Program Files (x86)\\Microsoft Visual Studio\\2019\\Enterprise', // 'windows-2019' and 'windows-latest'
+  'C:\\Program Files\\Microsoft Visual Studio\\2022\\Enterprise' // 'windows-2022'
+]
+const VCVARSALL_SUBPATH = '\\VC\\Auxiliary\\Build\\vcvarsall.bat'
+
+function findVcvarsallPath(): string {
+  for (const installation of KNOWN_VISUAL_STUDIO_INSTALLATIONS) {
+    const candidate = `${installation}${VCVARSALL_SUBPATH}`
+    if (existsSync(candidate)) {
+      return candidate
+    }
+  }
+  throw new Error('Failed to find vcvarsall.bat')
+}
+
+export function setUpWindowsEnvironment(): void {
+  core.startGroup('Updating Windows environment...')
+
+  const vcvarsallPath = findVcvarsallPath()
+  core.debug(`Calling "${vcvarsallPath}"...`)
+  const [originalEnv, vcvarsallOutput, updatedEnv] = execSync(
+    `set && cls && "${vcvarsallPath}" x64 && cls && set`,
+    {shell: 'cmd'}
+  )
+    .toString()
+    .split('\f') // form feed page break (printed by `cls`)
+  core.debug(vcvarsallOutput)
+
+  const originalEnvMap = new Map<string, string>()
+  for (const line of originalEnv.split('\r\n')) {
+    if (line.includes('=')) {
+      const [name, value] = line.split('=')
+      originalEnvMap.set(name, value)
+    } else if (line) {
+      core.debug(`Skipping ${line} (does not include '=')...`)
+    }
+  }
+
+  for (const line of updatedEnv.split('\r\n')) {
+    if (line.includes('=')) {
+      const [name, value] = line.split('=')
+      const originalValue = originalEnvMap.get(name)
+      if (value !== originalValue) {
+        core.exportVariable(name, value)
+        core.debug(`"${name}" set to "${value}"`)
+      }
+    } else if (line) {
+      core.debug(`Skipping ${line} (does not include '=')...`)
+    }
+  }
+
+  core.endGroup()
+}

src/utils.ts

@@ -0,0 +1,55 @@
+import * as c from './constants'
+import * as core from '@actions/core'
+import * as httpClient from '@actions/http-client'
+import * as tc from '@actions/tool-cache'
+import {Octokit} from '@octokit/core'
+import {join} from 'path'
+import {readdirSync} from 'fs'
+
+// Set up Octokit in the same way as @actions/github (see https://git.io/Jy9YP)
+const baseUrl = process.env['GITHUB_API_URL'] || 'https://api.github.com'
+const GitHub = Octokit.defaults({
+  baseUrl,
+  request: {
+    agent: new httpClient.HttpClient().getAgent(baseUrl)
+  }
+})
+
+export async function getLatestRelease(
+  repo: string
+): Promise<c.LatestReleaseResponse['data']> {
+  const githubToken = core.getInput('github-token')
+  const options = githubToken.length > 0 ? {auth: githubToken} : {}
+  const octokit = new GitHub(options)
+  return (
+    await octokit.request('GET /repos/{owner}/{repo}/releases/latest', {
+      owner: c.GRAALVM_GH_USER,
+      repo
+    })
+  ).data
+}
+
+export async function downloadAndExtractJDK(
+  downloadUrl: string
+): Promise<string> {
+  const downloadPath = await tc.downloadTool(downloadUrl)
+  if (downloadUrl.endsWith('.tar.gz')) {
+    await tc.extractTar(downloadPath, c.GRAALVM_BASE)
+  } else if (downloadUrl.endsWith('.zip')) {
+    await tc.extractZip(downloadPath, c.GRAALVM_BASE)
+  } else {
+    throw new Error(`Unexpected filetype downloaded: ${downloadUrl}`)
+  }
+  return findJavaHomeInSubfolder(c.GRAALVM_BASE)
+}
+
+export function findJavaHomeInSubfolder(searchPath: string): string {
+  const baseContents = readdirSync(searchPath)
+  if (baseContents.length === 1) {
+    return join(searchPath, baseContents[0], c.JDK_HOME_SUFFIX)
+  } else {
+    throw new Error(
+      `Unexpected amount of directory items found: ${baseContents.length}`
+    )
+  }
+}

tsconfig.json

@@ -0,0 +1,12 @@
+{
+  "compilerOptions": {
+    "target": "es6",                          /* Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017', 'ES2018', 'ES2019' or 'ESNEXT'. */
+    "module": "commonjs",                     /* Specify module code generation: 'none', 'commonjs', 'amd', 'system', 'umd', 'es2015', or 'ESNext'. */
+    "outDir": "./lib",                        /* Redirect output structure to the directory. */
+    "rootDir": "./src",                       /* Specify the root directory of input files. Use to control the output directory structure with --outDir. */
+    "strict": true,                           /* Enable all strict type-checking options. */
+    "noImplicitAny": true,                    /* Raise error on expressions and declarations with an implied 'any' type. */
+    "esModuleInterop": true                   /* Enables emit interoperability between CommonJS and ES Modules via creation of namespace objects for all imports. Implies 'allowSyntheticDefaultImports'. */
+  },
+  "exclude": ["node_modules", "**/*.test.ts"]
+}