Merge branch 'master' into release/v2

* master:
  Prepare for release 2.6.0.
  Update packages.
  Add information re. hardware acceleration for linux support.
  Support running on linux without hardware accleration.
  Gradle 6.3.
  Gradle 6.3-rc-4.
  Update workflow to use Java 14.
  Update npm packages.
  Bump acorn from 5.7.3 to 5.7.4

.github/workflows/workflow.yml

@@ -9,15 +9,24 @@ on:
 
 jobs:
   test:
-    runs-on: macOS-latest
-    timeout-minutes: 10
+    runs-on: ${{ matrix.os }}
+    timeout-minutes: 15
     strategy:
       matrix:
-        api-level: [21, 23, 29]
+        os: [macos-latest, ubuntu-latest]
+        api-level: [16, 23, 29]
+        exclude:
+          - os: ubuntu-latest
+            api-level: 23
+          - os: ubuntu-latest
+            api-level: 29
     steps:
     - name: checkout
       uses: actions/checkout@v2
 
+    - name: validate gradle wrapper
+      uses: gradle/wrapper-validation-action@v1
+
     - name: build, test and lint
       run: |
         npm install
@@ -25,23 +34,23 @@ jobs:
         npm run lint
         npm test
 
-    - name: Prepare test fixture
-      run: cp -a ./test-fixture/* ./
-
-    - name: Java 13
+    - name: Java 14
       uses: actions/setup-java@v1
       with:
-        java-version: 13
+        java-version: 14
 
     - name: run action
       uses: ./
       with:
         api-level: ${{ matrix.api-level }}
-        target: google_apis
+        target: default
         arch: x86
         profile: Nexus 6
         emulator-options: -no-window -gpu swiftshader_indirect -no-snapshot -noaudio -no-boot-anim -camera-back none
         disable-animations: true
+        working-directory: ./test-fixture/
         script: |
+          echo $GITHUB_REPOSITORY
+          adb devices
           ./gradlew help
           ./gradlew connectedDebugAndroidTest

CHANGELOG.md

@@ -1,5 +1,26 @@
 # Change Log
 
+## v2.6.0
+
+* Added support for Linux VMs (no hardware acceleration).
+
+## v2.5.0
+
+* Added support for API 15-19 system images.
+* Switched to the new SDK command-line tools which supports running `sdkmanager` and `avdmanager` with Java 9+.
+
+## v2.4.0
+
+* Added support for setting custom `working-directory` - e.g. `./android` if your root Gradle project is under the `./android` sub-directory within your repository.
+
+## v2.3.2
+
+* Fixed an issue where environment variables are escaped in script.
+
+## v2.3.1
+
+* Bumped Android Build tools to 29.0.3.
+
 ## v2.3.0
 
 * Added support for running the action with Java 9+ by forcing SDK manager and AVD manager to use Java 8.

README.md

@@ -4,7 +4,7 @@
   <a href="https://github.com/ReactiveCircus/android-emulator-runner"><img alt="GitHub Actions status" src="https://github.com/ReactiveCircus/android-emulator-runner/workflows/Main%20workflow/badge.svg"></a>
 </p>
 
-A GitHub Action for installing, configuring and running Android Emulators on macOS virtual machines.
+A GitHub Action for installing, configuring and running hardware-accelerated Android Emulators on macOS virtual machines (or Linux virtual machines but without hardware accleration).
 
 The old ARM-based emulators were slow and are no longer supported by Google. The modern Intel Atom (x86 and x86_64) emulators require hardware acceleration (HAXM on Mac & Windows, QEMU on Linux) from the host to run fast. This presents a challenge on CI as to be able to run hardware accelerated emulators within a docker container, **KVM** must be supported by the host VM which isn't the case for cloud-based CI providers due to infrastructural limits. If you want to learn more about this, here's an article I wrote: [Running Android Instrumented Tests on CI](https://dev.to/ychescale9/running-android-emulators-on-ci-from-bitrise-io-to-github-actions-3j76).
 
@@ -22,14 +22,16 @@ This action automates the process by doing the following:
 
 ## Usage
 
-Note that this action must be run on a **macOS** VM, e.g. `macOS-latest` or `macOS-10.14`.
+It is recommended to run this action on a **macOS** VM, e.g. `macos-latest` or `macos-10.15` to take advantage of hardware accleration support provided by **HAXM**.
+
+Please note that while Linux VMs (e.g. `ubuntu-latest` or `ubuntu-18.04`) are also supported, hardware acceleration will **not** be available.
 
 A workflow that uses **android-emulator-runner** to run your instrumented tests on **API 29**:
 
 ```
 jobs:
   test:
-    runs-on: macOS-latest
+    runs-on: macos-latest
     steps:
     - name: checkout
       uses: actions/checkout@v2
@@ -46,7 +48,7 @@ We can also leverage GitHub Actions's build matrix to test across multiple confi
 ```
 jobs:
   test:
-    runs-on: macOS-latest
+    runs-on: macos-latest
     strategy:
       matrix:
         api-level: [21, 23, 29]
@@ -69,13 +71,16 @@ jobs:
 
 |  | **Required** | **Default** | **Description** |
 |----------------------|--------------|-------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
-| `api-level` | Required | N/A | API level of the platform system image - e.g. 23 for Android Marshmallow, 29 for Android 10. **Minimum API level supported is 21**. |
+| `api-level` | Required | N/A | API level of the platform system image - e.g. 23 for Android Marshmallow, 29 for Android 10. **Minimum API level supported is 15**. |
 | `target` | Optional | `default` | Target of the system image - `default` or `google_apis`. |
-| `arch` | Optional | `x86` | CPU architecture of the system image - `x86` or `x86_64`. |
+| `arch` | Optional | `x86` | CPU architecture of the system image - `x86` or `x86_64`. Note that `x86_64` image is only available for API 21+. |
 | `profile` | Optional | N/A | Hardware profile used for creating the AVD - e.g. `Nexus 6`. For a list of all profiles available, run `$ANDROID_HOME/tools/bin/avdmanager list` and refer to the results under "Available Android Virtual Devices". |
 | `emulator-options` | Optional | See below | Command-line options used when launching the emulator (replacing all default options) - e.g. `-no-window -no-snapshot -camera-back emulated`. |
 | `disable-animations` | Optional | `true` | Whether to disable animations - `true` or `false`. |
 | `emulator-build` | Optional | N/A | Build number of a specific version of the emulator binary to use e.g. `6061023` for emulator v29.3.0.0. |
+| `working-directory` | Optional | `./` | A custom working directory - e.g. `./android` if your root Gradle project is under the `./android` sub-directory within your repository. |
 | `script` | Required | N/A | Custom script to run - e.g. to run Android instrumented tests on the emulator: `./gradlew connectedCheck` |
 
 Default `emulator-options`: `-no-window -gpu swiftshader_indirect -no-snapshot -noaudio -no-boot-anim`.
+
+_Please note that if you are running on a Linux VM, `-no-accel` will be added to the `emulator-options` to make sure hardware acceleration is turned off._

__tests__/input-validator.test.ts

@@ -17,14 +17,14 @@ describe('api-level validator tests', () => {
 
   it('Throws if api-level is lower than min API supported', () => {
     const func = () => {
-      validator.checkApiLevel('20');
+      validator.checkApiLevel('14');
     };
     expect(func).toThrowError(`Minimum API level supported is ${validator.MIN_API_LEVEL}.`);
   });
 
   it('Validates successfully with valid api-level', () => {
     const func1 = () => {
-      validator.checkApiLevel('21');
+      validator.checkApiLevel('15');
     };
     expect(func1).not.toThrow();
 

lib/emulator-manager.js

@@ -17,8 +17,6 @@ var __importStar = (this && this.__importStar) || function (mod) {
 Object.defineProperty(exports, "__esModule", { value: true });
 const exec = __importStar(require("@actions/exec"));
 const EMULATOR_BOOT_TIMEOUT_SECONDS = 300;
-const AVD_MANAGER_PATH = `${process.env.ANDROID_HOME}/tools/bin/avdmanager`;
-const ADB_PATH = `${process.env.ANDROID_HOME}/platform-tools/adb`;
 /**
  * Creates and launches a new AVD instance with the specified configurations.
  */
@@ -27,14 +25,18 @@ function launchEmulator(apiLevel, target, arch, profile, emulatorOptions, disabl
         // create a new AVD
         if (profile.trim() !== '') {
             console.log(`Creating AVD with custom profile ${profile}`);
-            yield exec.exec(`${AVD_MANAGER_PATH} create avd --force -n test --abi "${target}/${arch}" --package "system-images;android-${apiLevel};${target};${arch}" --device "${profile}"`);
+            yield exec.exec(`avdmanager create avd --force -n test --abi "${target}/${arch}" --package "system-images;android-${apiLevel};${target};${arch}" --device "${profile}"`);
         }
         else {
             console.log(`Creating AVD without custom profile.`);
-            yield exec.exec(`sh -c \\"echo no | ${AVD_MANAGER_PATH} create avd --force -n test --abi '${target}/${arch}' --package 'system-images;android-${apiLevel};${target};${arch}'"`);
+            yield exec.exec(`sh -c \\"echo no | avdmanager create avd --force -n test --abi '${target}/${arch}' --package 'system-images;android-${apiLevel};${target};${arch}'"`);
         }
         // start emulator
         console.log('Starting emulator.');
+        // turn off hardware acceleration on Linux
+        if (process.platform === 'linux') {
+            emulatorOptions += ' -accel off';
+        }
         yield exec.exec(`sh -c \\"${process.env.ANDROID_HOME}/emulator/emulator -avd test ${emulatorOptions} &"`, [], {
             listeners: {
                 stderr: (data) => {
@@ -46,13 +48,13 @@ function launchEmulator(apiLevel, target, arch, profile, emulatorOptions, disabl
         });
         // wait for emulator to complete booting
         yield waitForDevice();
-        yield exec.exec(`${ADB_PATH} shell input keyevent 82`);
+        yield exec.exec(`adb shell input keyevent 82`);
         // disable animations
         if (disableAnimations) {
             console.log('Disabling animations.');
-            yield exec.exec(`${ADB_PATH} shell settings put global window_animation_scale 0.0`);
-            yield exec.exec(`${ADB_PATH} shell settings put global transition_animation_scale 0.0`);
-            yield exec.exec(`${ADB_PATH} shell settings put global animator_duration_scale 0.0`);
+            yield exec.exec(`adb shell settings put global window_animation_scale 0.0`);
+            yield exec.exec(`adb shell settings put global transition_animation_scale 0.0`);
+            yield exec.exec(`adb shell settings put global animator_duration_scale 0.0`);
         }
     });
 }
@@ -63,7 +65,7 @@ exports.launchEmulator = launchEmulator;
 function killEmulator() {
     return __awaiter(this, void 0, void 0, function* () {
         try {
-            yield exec.exec(`${ADB_PATH} -s emulator-5554 emu kill`);
+            yield exec.exec(`adb -s emulator-5554 emu kill`);
         }
         catch (error) {
             console.log(error.message);
@@ -83,7 +85,7 @@ function waitForDevice() {
         while (!booted) {
             try {
                 let result = '';
-                yield exec.exec(`${ADB_PATH} shell getprop sys.boot_completed`, [], {
+                yield exec.exec(`adb shell getprop sys.boot_completed`, [], {
                     listeners: {
                         stdout: (data) => {
                             result += data.toString();

lib/input-validator.js

@@ -1,6 +1,6 @@
 "use strict";
 Object.defineProperty(exports, "__esModule", { value: true });
-exports.MIN_API_LEVEL = 21;
+exports.MIN_API_LEVEL = 15;
 exports.VALID_TARGETS = ['default', 'google_apis'];
 exports.VALID_ARCHS = ['x86', 'x86_64'];
 function checkApiLevel(apiLevel) {

lib/java-version-manager.js

@@ -1,60 +0,0 @@
-"use strict";
-var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
-    return new (P || (P = Promise))(function (resolve, reject) {
-        function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
-        function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
-        function step(result) { result.done ? resolve(result.value) : new P(function (resolve) { resolve(result.value); }).then(fulfilled, rejected); }
-        step((generator = generator.apply(thisArg, _arguments || [])).next());
-    });
-};
-var __importStar = (this && this.__importStar) || function (mod) {
-    if (mod && mod.__esModule) return mod;
-    var result = {};
-    if (mod != null) for (var k in mod) if (Object.hasOwnProperty.call(mod, k)) result[k] = mod[k];
-    result["default"] = mod;
-    return result;
-};
-Object.defineProperty(exports, "__esModule", { value: true });
-const core = __importStar(require("@actions/core"));
-const exec = __importStar(require("@actions/exec"));
-/**
- * Returns the current $JAVA_HOME path.
- */
-function getCurrentJavaHome() {
-    return __awaiter(this, void 0, void 0, function* () {
-        let defaultJavaHome = '';
-        yield exec.exec(`sh -c \\"echo $JAVA_HOME"`, [], {
-            listeners: {
-                stdout: (data) => {
-                    defaultJavaHome += data.toString();
-                }
-            }
-        });
-        return defaultJavaHome.trim();
-    });
-}
-exports.getCurrentJavaHome = getCurrentJavaHome;
-/**
- * Returns the Java 8 $JAVA_HOME path.
- */
-function getJavaHomeV8() {
-    return __awaiter(this, void 0, void 0, function* () {
-        let javaHomeV8 = '';
-        yield exec.exec(`/usr/libexec/java_home -v 1.8`, [], {
-            listeners: {
-                stdout: (data) => {
-                    javaHomeV8 += data.toString();
-                }
-            }
-        });
-        return javaHomeV8.trim();
-    });
-}
-exports.getJavaHomeV8 = getJavaHomeV8;
-/**
- * Sets $JAVA_HOME to the specified path.
- */
-function setJavaHome(path) {
-    core.exportVariable('JAVA_HOME', path);
-}
-exports.setJavaHome = setJavaHome;

lib/main.js

@@ -21,13 +21,17 @@ const input_validator_1 = require("./input-validator");
 const emulator_manager_1 = require("./emulator-manager");
 const exec = __importStar(require("@actions/exec"));
 const script_parser_1 = require("./script-parser");
-const java_version_manager_1 = require("./java-version-manager");
 function run() {
     return __awaiter(this, void 0, void 0, function* () {
         try {
-            // only support running on macOS
+            // only support running on macOS or Linux
             if (process.platform !== 'darwin') {
-                throw new Error('This action is expected to be run within a macOS virtual machine to enable hardware acceleration.');
+                if (process.platform === 'linux') {
+                    console.warn(`You're running a Linux VM where hardware acceleration is not available. Please consider using a macOS VM instead to take advantage of native hardware acceleration support provided by HAXM.`);
+                }
+                else {
+                    throw new Error('Unsupported virtual machine: please use either macos or ubuntu VM.');
+                }
             }
             // API level of the platform and system image
             const apiLevelInput = core.getInput('api-level', { required: true });
@@ -60,6 +64,12 @@ function run() {
                 console.log(`using emulator build: ${emulatorBuildInput}`);
             }
             const emulatorBuild = !emulatorBuildInput ? undefined : emulatorBuildInput;
+            // custom working directory
+            const workingDirectoryInput = core.getInput('working-directory');
+            if (workingDirectoryInput) {
+                console.log(`custom working directory: ${workingDirectoryInput}`);
+            }
+            const workingDirectory = !workingDirectoryInput ? undefined : workingDirectoryInput;
             // custom script to run
             const scriptInput = core.getInput('script', { required: true });
             const scripts = script_parser_1.parseScript(scriptInput);
@@ -67,24 +77,18 @@ function run() {
             scripts.forEach((script) => __awaiter(this, void 0, void 0, function* () {
                 console.log(`${script}`);
             }));
-            // use Java 8 for sdkmanager and avdmanager
-            const defaultJavaHome = yield java_version_manager_1.getCurrentJavaHome();
-            java_version_manager_1.setJavaHome(yield java_version_manager_1.getJavaHomeV8());
             // install SDK
             yield sdk_installer_1.installAndroidSdk(apiLevel, target, arch, emulatorBuild);
-            try {
-                // launch an emulator
-                yield emulator_manager_1.launchEmulator(apiLevel, target, arch, profile, emulatorOptions, disableAnimations);
-            }
-            catch (error) {
-                core.setFailed(error.message);
-            }
-            // use default JAVA_HOME for running custom script
-            java_version_manager_1.setJavaHome(defaultJavaHome);
+            // launch an emulator
+            yield emulator_manager_1.launchEmulator(apiLevel, target, arch, profile, emulatorOptions, disableAnimations);
             // execute the custom script
             try {
+                // move to custom working directory if set
+                if (workingDirectory) {
+                    process.chdir(workingDirectory);
+                }
                 for (const script of scripts) {
-                    yield exec.exec(`${script}`);
+                    yield exec.exec(`sh -c \\"${script}"`);
                 }
             }
             catch (error) {

lib/sdk-installer.js

@@ -15,30 +15,42 @@ var __importStar = (this && this.__importStar) || function (mod) {
     return result;
 };
 Object.defineProperty(exports, "__esModule", { value: true });
+const core = __importStar(require("@actions/core"));
 const exec = __importStar(require("@actions/exec"));
-const BUILD_TOOLS_VERSION = '29.0.2';
+const BUILD_TOOLS_VERSION = '29.0.3';
+const CMDLINE_TOOLS_URL_MAC = 'https://dl.google.com/android/repository/commandlinetools-linux-6200805_latest.zip';
+const CMDLINE_TOOLS_URL_LINUX = 'https://dl.google.com/android/repository/commandlinetools-linux-6200805_latest.zip';
 /**
  * Installs & updates the Android SDK for the macOS platform, including SDK platform for the chosen API level, latest build tools, platform tools, Android Emulator,
  * and the system image for the chosen API level, CPU arch, and target.
  */
 function installAndroidSdk(apiLevel, target, arch, emulatorBuild) {
     return __awaiter(this, void 0, void 0, function* () {
-        const sdkmangerPath = `${process.env.ANDROID_HOME}/tools/bin/sdkmanager`;
+        const isOnMac = process.platform === 'darwin';
+        console.log('Installing new cmdline-tools.');
+        const sdkUrl = isOnMac ? CMDLINE_TOOLS_URL_MAC : CMDLINE_TOOLS_URL_LINUX;
+        yield exec.exec(`sudo mkdir ${process.env.ANDROID_HOME}/cmdline-tools`);
+        yield exec.exec(`curl -fo commandlinetools.zip ${sdkUrl}`);
+        yield exec.exec(`sudo unzip -q commandlinetools.zip -d ${process.env.ANDROID_HOME}/cmdline-tools`);
+        yield exec.exec(`sudo rm -f commandlinetools.zip`);
+        // add paths for commandline-tools and platform-tools
+        core.addPath(`${process.env.ANDROID_HOME}/cmdline-tools/tools:${process.env.ANDROID_HOME}/cmdline-tools/tools/bin:${process.env.ANDROID_HOME}/platform-tools`);
+        yield exec.exec(`sh -c \\"sudo chmod -R 777 ${process.env.ANDROID_HOME}"`);
         console.log('Installing latest build tools, platform tools, and platform.');
-        yield exec.exec(`sh -c \\"${sdkmangerPath} --install 'build-tools;${BUILD_TOOLS_VERSION}' platform-tools 'platforms;android-${apiLevel}' > /dev/null"`);
+        yield exec.exec(`sh -c \\"sdkmanager --install 'build-tools;${BUILD_TOOLS_VERSION}' platform-tools 'platforms;android-${apiLevel}' > /dev/null"`);
         if (emulatorBuild) {
             console.log(`Installing emulator build ${emulatorBuild}.`);
-            yield exec.exec(`curl -fo emulator.zip https://dl.google.com/android/repository/emulator-darwin-${emulatorBuild}.zip`);
-            yield exec.exec(`rm -rf ${process.env.ANDROID_HOME}/emulator`);
-            yield exec.exec(`unzip -q emulator.zip -d ${process.env.ANDROID_HOME}`);
-            yield exec.exec(`rm -f emulator.zip`);
+            yield exec.exec(`curl -fo emulator.zip https://dl.google.com/android/repository/emulator-${isOnMac ? 'darwin' : 'linux'}-${emulatorBuild}.zip`);
+            yield exec.exec(`sudo rm -rf ${process.env.ANDROID_HOME}/emulator`);
+            yield exec.exec(`sudo unzip -q emulator.zip -d ${process.env.ANDROID_HOME}`);
+            yield exec.exec(`sudo rm -f emulator.zip`);
         }
         else {
             console.log('Installing latest emulator.');
-            yield exec.exec(`sh -c \\"${sdkmangerPath} --install emulator > /dev/null"`);
+            yield exec.exec(`sh -c \\"sdkmanager --install emulator > /dev/null"`);
         }
         console.log('Installing system images.');
-        yield exec.exec(`sh -c \\"${sdkmangerPath} --install 'system-images;android-${apiLevel};${target};${arch}' > /dev/null"`);
+        yield exec.exec(`sh -c \\"sdkmanager --install 'system-images;android-${apiLevel};${target};${arch}' > /dev/null"`);
     });
 }
 exports.installAndroidSdk = installAndroidSdk;

package.json

@@ -23,7 +23,8 @@
   "dependencies": {
     "@actions/core": "^1.0.0",
     "@actions/exec": "^1.0.1",
-    "@actions/tool-cache": "^1.1.2"
+    "@actions/tool-cache": "^1.1.2",
+    "minimist": "^1.2.5"
   },
   "devDependencies": {
     "@types/jest": "^24.0.13",
@@ -34,8 +35,8 @@
     "eslint-config-prettier": "^6.5.0",
     "eslint-plugin-import": "^2.18.2",
     "eslint-plugin-prettier": "^3.1.1",
-    "jest": "^24.8.0",
-    "jest-circus": "^24.7.1",
+    "jest": "^25.2.3",
+    "jest-circus": "^25.2.3",
     "prettier": "^1.18.2",
     "ts-jest": "^24.0.2",
     "typescript": "^3.5.1"

src/emulator-manager.ts

@@ -1,8 +1,6 @@
 import * as exec from '@actions/exec';
 
 const EMULATOR_BOOT_TIMEOUT_SECONDS = 300;
-const AVD_MANAGER_PATH = `${process.env.ANDROID_HOME}/tools/bin/avdmanager`;
-const ADB_PATH = `${process.env.ANDROID_HOME}/platform-tools/adb`;
 
 /**
  * Creates and launches a new AVD instance with the specified configurations.
@@ -11,14 +9,20 @@ export async function launchEmulator(apiLevel: number, target: string, arch: str
   // create a new AVD
   if (profile.trim() !== '') {
     console.log(`Creating AVD with custom profile ${profile}`);
-    await exec.exec(`${AVD_MANAGER_PATH} create avd --force -n test --abi "${target}/${arch}" --package "system-images;android-${apiLevel};${target};${arch}" --device "${profile}"`);
+    await exec.exec(`avdmanager create avd --force -n test --abi "${target}/${arch}" --package "system-images;android-${apiLevel};${target};${arch}" --device "${profile}"`);
   } else {
     console.log(`Creating AVD without custom profile.`);
-    await exec.exec(`sh -c \\"echo no | ${AVD_MANAGER_PATH} create avd --force -n test --abi '${target}/${arch}' --package 'system-images;android-${apiLevel};${target};${arch}'"`);
+    await exec.exec(`sh -c \\"echo no | avdmanager create avd --force -n test --abi '${target}/${arch}' --package 'system-images;android-${apiLevel};${target};${arch}'"`);
   }
 
   // start emulator
   console.log('Starting emulator.');
+
+  // turn off hardware acceleration on Linux
+  if (process.platform === 'linux') {
+    emulatorOptions += ' -accel off';
+  }
+
   await exec.exec(`sh -c \\"${process.env.ANDROID_HOME}/emulator/emulator -avd test ${emulatorOptions} &"`, [], {
     listeners: {
       stderr: (data: Buffer) => {
@@ -31,14 +35,14 @@ export async function launchEmulator(apiLevel: number, target: string, arch: str
 
   // wait for emulator to complete booting
   await waitForDevice();
-  await exec.exec(`${ADB_PATH} shell input keyevent 82`);
+  await exec.exec(`adb shell input keyevent 82`);
 
   // disable animations
   if (disableAnimations) {
     console.log('Disabling animations.');
-    await exec.exec(`${ADB_PATH} shell settings put global window_animation_scale 0.0`);
-    await exec.exec(`${ADB_PATH} shell settings put global transition_animation_scale 0.0`);
-    await exec.exec(`${ADB_PATH} shell settings put global animator_duration_scale 0.0`);
+    await exec.exec(`adb shell settings put global window_animation_scale 0.0`);
+    await exec.exec(`adb shell settings put global transition_animation_scale 0.0`);
+    await exec.exec(`adb shell settings put global animator_duration_scale 0.0`);
   }
 }
 
@@ -47,7 +51,7 @@ export async function launchEmulator(apiLevel: number, target: string, arch: str
  */
 export async function killEmulator(): Promise<void> {
   try {
-    await exec.exec(`${ADB_PATH} -s emulator-5554 emu kill`);
+    await exec.exec(`adb -s emulator-5554 emu kill`);
   } catch (error) {
     console.log(error.message);
   }
@@ -64,7 +68,7 @@ async function waitForDevice(): Promise<void> {
   while (!booted) {
     try {
       let result = '';
-      await exec.exec(`${ADB_PATH} shell getprop sys.boot_completed`, [], {
+      await exec.exec(`adb shell getprop sys.boot_completed`, [], {
         listeners: {
           stdout: (data: Buffer) => {
             result += data.toString();

src/input-validator.ts

@@ -1,4 +1,4 @@
-export const MIN_API_LEVEL = 21;
+export const MIN_API_LEVEL = 15;
 export const VALID_TARGETS: Array<string> = ['default', 'google_apis'];
 export const VALID_ARCHS: Array<string> = ['x86', 'x86_64'];
 

src/java-version-manager.ts

@@ -1,39 +0,0 @@
-import * as core from '@actions/core';
-import * as exec from '@actions/exec';
-
-/**
- * Returns the current $JAVA_HOME path.
- */
-export async function getCurrentJavaHome(): Promise<string> {
-  let defaultJavaHome = '';
-  await exec.exec(`sh -c \\"echo $JAVA_HOME"`, [], {
-    listeners: {
-      stdout: (data: Buffer) => {
-        defaultJavaHome += data.toString();
-      }
-    }
-  });
-  return defaultJavaHome.trim();
-}
-
-/**
- * Returns the Java 8 $JAVA_HOME path.
- */
-export async function getJavaHomeV8(): Promise<string> {
-  let javaHomeV8 = '';
-  await exec.exec(`/usr/libexec/java_home -v 1.8`, [], {
-    listeners: {
-      stdout: (data: Buffer) => {
-        javaHomeV8 += data.toString();
-      }
-    }
-  });
-  return javaHomeV8.trim();
-}
-
-/**
- * Sets $JAVA_HOME to the specified path.
- */
-export function setJavaHome(path: string) {
-  core.exportVariable('JAVA_HOME', path);
-}

src/main.ts

@@ -4,13 +4,18 @@ import { checkApiLevel, checkTarget, checkArch, checkDisableAnimations, checkEmu
 import { launchEmulator, killEmulator } from './emulator-manager';
 import * as exec from '@actions/exec';
 import { parseScript } from './script-parser';
-import { getCurrentJavaHome, getJavaHomeV8, setJavaHome } from './java-version-manager';
 
 async function run() {
   try {
-    // only support running on macOS
+    // only support running on macOS or Linux
     if (process.platform !== 'darwin') {
-      throw new Error('This action is expected to be run within a macOS virtual machine to enable hardware acceleration.');
+      if (process.platform === 'linux') {
+        console.warn(
+          `You're running a Linux VM where hardware acceleration is not available. Please consider using a macOS VM instead to take advantage of native hardware acceleration support provided by HAXM.`
+        );
+      } else {
+        throw new Error('Unsupported virtual machine: please use either macos or ubuntu VM.');
+      }
     }
 
     // API level of the platform and system image
@@ -51,6 +56,13 @@ async function run() {
     }
     const emulatorBuild = !emulatorBuildInput ? undefined : emulatorBuildInput;
 
+    // custom working directory
+    const workingDirectoryInput = core.getInput('working-directory');
+    if (workingDirectoryInput) {
+      console.log(`custom working directory: ${workingDirectoryInput}`);
+    }
+    const workingDirectory = !workingDirectoryInput ? undefined : workingDirectoryInput;
+
     // custom script to run
     const scriptInput = core.getInput('script', { required: true });
     const scripts = parseScript(scriptInput);
@@ -59,27 +71,20 @@ async function run() {
       console.log(`${script}`);
     });
 
-    // use Java 8 for sdkmanager and avdmanager
-    const defaultJavaHome = await getCurrentJavaHome();
-    setJavaHome(await getJavaHomeV8());
-
     // install SDK
     await installAndroidSdk(apiLevel, target, arch, emulatorBuild);
 
-    try {
-      // launch an emulator
-      await launchEmulator(apiLevel, target, arch, profile, emulatorOptions, disableAnimations);
-    } catch (error) {
-      core.setFailed(error.message);
-    }
-
-    // use default JAVA_HOME for running custom script
-    setJavaHome(defaultJavaHome);
+    // launch an emulator
+    await launchEmulator(apiLevel, target, arch, profile, emulatorOptions, disableAnimations);
 
     // execute the custom script
     try {
+      // move to custom working directory if set
+      if (workingDirectory) {
+        process.chdir(workingDirectory);
+      }
       for (const script of scripts) {
-        await exec.exec(`${script}`);
+        await exec.exec(`sh -c \\"${script}"`);
       }
     } catch (error) {
       core.setFailed(error.message);

src/sdk-installer.ts

@@ -1,25 +1,40 @@
+import * as core from '@actions/core';
 import * as exec from '@actions/exec';
 
-const BUILD_TOOLS_VERSION = '29.0.2';
+const BUILD_TOOLS_VERSION = '29.0.3';
+const CMDLINE_TOOLS_URL_MAC = 'https://dl.google.com/android/repository/commandlinetools-linux-6200805_latest.zip';
+const CMDLINE_TOOLS_URL_LINUX = 'https://dl.google.com/android/repository/commandlinetools-linux-6200805_latest.zip';
 
 /**
  * Installs & updates the Android SDK for the macOS platform, including SDK platform for the chosen API level, latest build tools, platform tools, Android Emulator,
  * and the system image for the chosen API level, CPU arch, and target.
  */
 export async function installAndroidSdk(apiLevel: number, target: string, arch: string, emulatorBuild?: string): Promise<void> {
-  const sdkmangerPath = `${process.env.ANDROID_HOME}/tools/bin/sdkmanager`;
+  const isOnMac = process.platform === 'darwin';
+  console.log('Installing new cmdline-tools.');
+  const sdkUrl = isOnMac ? CMDLINE_TOOLS_URL_MAC : CMDLINE_TOOLS_URL_LINUX;
+  await exec.exec(`sudo mkdir ${process.env.ANDROID_HOME}/cmdline-tools`);
+  await exec.exec(`curl -fo commandlinetools.zip ${sdkUrl}`);
+  await exec.exec(`sudo unzip -q commandlinetools.zip -d ${process.env.ANDROID_HOME}/cmdline-tools`);
+  await exec.exec(`sudo rm -f commandlinetools.zip`);
+
+  // add paths for commandline-tools and platform-tools
+  core.addPath(`${process.env.ANDROID_HOME}/cmdline-tools/tools:${process.env.ANDROID_HOME}/cmdline-tools/tools/bin:${process.env.ANDROID_HOME}/platform-tools`);
+  await exec.exec(`sh -c \\"sudo chmod -R 777 ${process.env.ANDROID_HOME}"`);
+
   console.log('Installing latest build tools, platform tools, and platform.');
-  await exec.exec(`sh -c \\"${sdkmangerPath} --install 'build-tools;${BUILD_TOOLS_VERSION}' platform-tools 'platforms;android-${apiLevel}' > /dev/null"`);
+
+  await exec.exec(`sh -c \\"sdkmanager --install 'build-tools;${BUILD_TOOLS_VERSION}' platform-tools 'platforms;android-${apiLevel}' > /dev/null"`);
   if (emulatorBuild) {
     console.log(`Installing emulator build ${emulatorBuild}.`);
-    await exec.exec(`curl -fo emulator.zip https://dl.google.com/android/repository/emulator-darwin-${emulatorBuild}.zip`);
-    await exec.exec(`rm -rf ${process.env.ANDROID_HOME}/emulator`);
-    await exec.exec(`unzip -q emulator.zip -d ${process.env.ANDROID_HOME}`);
-    await exec.exec(`rm -f emulator.zip`);
+    await exec.exec(`curl -fo emulator.zip https://dl.google.com/android/repository/emulator-${isOnMac ? 'darwin' : 'linux'}-${emulatorBuild}.zip`);
+    await exec.exec(`sudo rm -rf ${process.env.ANDROID_HOME}/emulator`);
+    await exec.exec(`sudo unzip -q emulator.zip -d ${process.env.ANDROID_HOME}`);
+    await exec.exec(`sudo rm -f emulator.zip`);
   } else {
     console.log('Installing latest emulator.');
-    await exec.exec(`sh -c \\"${sdkmangerPath} --install emulator > /dev/null"`);
+    await exec.exec(`sh -c \\"sdkmanager --install emulator > /dev/null"`);
   }
   console.log('Installing system images.');
-  await exec.exec(`sh -c \\"${sdkmangerPath} --install 'system-images;android-${apiLevel};${target};${arch}' > /dev/null"`);
+  await exec.exec(`sh -c \\"sdkmanager --install 'system-images;android-${apiLevel};${target};${arch}' > /dev/null"`);
 }

test-fixture/app/build.gradle

@@ -4,11 +4,11 @@ apply plugin: 'kotlin-android-extensions'
 
 android {
     compileSdkVersion 29
-    buildToolsVersion "29.0.2"
+    buildToolsVersion "29.0.3"
 
     defaultConfig {
         applicationId "com.example.testapp"
-        minSdkVersion 21
+        minSdkVersion 15
         targetSdkVersion 29
         versionCode 1
         versionName "1.0"
@@ -28,9 +28,9 @@ dependencies {
     implementation fileTree(dir: 'libs', include: ['*.jar'])
     implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk8:$kotlin_version"
     implementation 'androidx.appcompat:appcompat:1.1.0'
-    implementation 'androidx.core:core-ktx:1.1.0'
+    implementation 'androidx.core:core-ktx:1.2.0'
     implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
-    testImplementation 'junit:junit:4.12'
+    testImplementation 'junit:junit:4.13'
     androidTestImplementation 'androidx.test.ext:junit:1.1.1'
     androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'
 }

test-fixture/build.gradle

@@ -1,13 +1,13 @@
 // Top-level build file where you can add configuration options common to all sub-projects/modules.
 
 buildscript {
-    ext.kotlin_version = '1.3.61'
+    ext.kotlin_version = '1.3.70'
     repositories {
         google()
         jcenter()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.5.3'
+        classpath 'com.android.tools.build:gradle:3.6.0'
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
 
         // NOTE: Do not place your application dependencies here; they belong

test-fixture/gradle/wrapper/gradle-wrapper.properties

@@ -3,4 +3,4 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-6.0.1-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.3-all.zip