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

@@ -9,11 +9,17 @@ on:
 
 jobs:
   test:
-    runs-on: macOS-latest
-    timeout-minutes: 10
+    runs-on: ${{ matrix.os }}
+    timeout-minutes: 15
     strategy:
       matrix:
-        api-level: [16, 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
@@ -28,10 +34,10 @@ jobs:
         npm run lint
         npm test
 
-    - name: Java 13
+    - name: Java 14
       uses: actions/setup-java@v1
       with:
-        java-version: 13
+        java-version: 14
 
     - name: run action
       uses: ./

CHANGELOG.md

@@ -1,5 +1,9 @@
 # Change Log
 
+## v2.6.0
+
+* Added support for Linux VMs (no hardware acceleration).
+
 ## v2.5.0
 
 * Added support for API 15-19 system images.

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]
@@ -80,3 +82,5 @@ jobs:
 | `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._

lib/emulator-manager.js

@@ -33,6 +33,10 @@ function launchEmulator(apiLevel, target, arch, profile, emulatorOptions, disabl
         }
         // 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) => {

lib/main.js

@@ -24,9 +24,14 @@ const script_parser_1 = require("./script-parser");
 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 });
@@ -74,13 +79,8 @@ function run() {
             }));
             // 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);
-            }
+            // 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

lib/sdk-installer.js

@@ -18,28 +18,32 @@ Object.defineProperty(exports, "__esModule", { value: true });
 const core = __importStar(require("@actions/core"));
 const exec = __importStar(require("@actions/exec"));
 const BUILD_TOOLS_VERSION = '29.0.3';
-const CMDLINE_TOOLS_URL = 'https://dl.google.com/android/repository/commandlinetools-linux-6200805_latest.zip';
+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 isOnMac = process.platform === 'darwin';
         console.log('Installing new cmdline-tools.');
-        yield exec.exec(`mkdir ${process.env.ANDROID_HOME}/cmdline-tools`);
-        yield exec.exec(`curl -fo commandlinetools.zip ${CMDLINE_TOOLS_URL}`);
-        yield exec.exec(`unzip -q commandlinetools.zip -d ${process.env.ANDROID_HOME}/cmdline-tools`);
-        yield exec.exec(`rm -f commandlinetools.zip`);
+        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 ${process.env.ANDROID_HOME}"`);
         console.log('Installing latest build tools, platform tools, and platform.');
         yield exec.exec(`sh -c \\"sdkmanager --install 'build-tools;${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.');