Support choosing channel to download SDK components from.

src/channel-id-mapper.ts

@@ -0,0 +1,13 @@
+export function getChannelId(channelName: string): number {
+  if (channelName === 'stable') {
+    return 0;
+  } else if (channelName === 'beta') {
+    return 1;
+  } else if (channelName === 'dev') {
+    return 2;
+  } else if (channelName === 'canary') {
+    return 3;
+  } else {
+    throw new Error(`Unexpected channel name: '${channelName}'.`);
+  }
+}

src/input-validator.ts

@@ -1,6 +1,7 @@
 export const MIN_API_LEVEL = 15;
 export const VALID_TARGETS: Array<string> = ['default', 'google_apis', 'google_apis_playstore', 'android-wear', 'android-wear-cn', 'android-tv', 'google-tv'];
 export const VALID_ARCHS: Array<string> = ['x86', 'x86_64', 'arm64-v8a'];
+export const VALID_CHANNELS: Array<string> = ['stable', 'beta', 'dev', 'canary'];
 
 export function checkApiLevel(apiLevel: string): void {
   if (isNaN(Number(apiLevel)) || !Number.isInteger(Number(apiLevel))) {
@@ -23,6 +24,12 @@ export function checkArch(arch: string): void {
   }
 }
 
+export function checkChannel(channel: string): void {
+  if (!VALID_CHANNELS.includes(channel)) {
+    throw new Error(`Value for input.channel '${channel}' is unknown. Supported options: ${VALID_CHANNELS}.`);
+  }
+}
+
 export function checkForceAvdCreation(forceAvdCreation: string): void {
   if (!isValidBoolean(forceAvdCreation)) {
     throw new Error(`Input for input.force-avd-creation should be either 'true' or 'false'.`);

src/main.ts

@@ -8,11 +8,13 @@ import {
   checkEmulatorBuild,
   checkDisableSpellchecker,
   checkDisableLinuxHardwareAcceleration,
-  checkForceAvdCreation
+  checkForceAvdCreation,
+  checkChannel
 } from './input-validator';
 import { launchEmulator, killEmulator } from './emulator-manager';
 import * as exec from '@actions/exec';
 import { parseScript } from './script-parser';
+import { getChannelId } from './channel-id-mapper';
 
 async function run() {
   try {
@@ -121,6 +123,12 @@ async function run() {
     }
     const cmakeVersion = !cmakeInput ? undefined : cmakeInput;
 
+    // channelId (up to and including) to download the SDK packages from
+    const channelName = core.getInput('channel');
+    checkChannel(channelName);
+    const channelId = getChannelId(channelName);
+    console.log(`Channel: ${channelId} (${channelName})`);
+
     // custom script to run
     const scriptInput = core.getInput('script', { required: true });
     const scripts = parseScript(scriptInput);
@@ -130,7 +138,7 @@ async function run() {
     });
 
     // install SDK
-    await installAndroidSdk(apiLevel, target, arch, emulatorBuild, ndkVersion, cmakeVersion);
+    await installAndroidSdk(apiLevel, target, arch, channelId, emulatorBuild, ndkVersion, cmakeVersion);
 
     // launch an emulator
     await launchEmulator(

src/sdk-installer.ts

@@ -12,7 +12,7 @@ const CMDLINE_TOOLS_URL_LINUX = 'https://dl.google.com/android/repository/comman
  * 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, ndkVersion?: string, cmakeVersion?: string): Promise<void> {
+export async function installAndroidSdk(apiLevel: number, target: string, arch: string, channelId: number, emulatorBuild?: string, ndkVersion?: string, cmakeVersion?: string): Promise<void> {
   const isOnMac = process.platform === 'darwin';
 
   if (!isOnMac) {
@@ -42,7 +42,7 @@ export async function installAndroidSdk(apiLevel: number, target: string, arch:
   await exec.exec(`sh -c \\"sdkmanager --install 'build-tools;${BUILD_TOOLS_VERSION}' platform-tools 'platforms;android-${apiLevel}' > /dev/null"`);
 
   console.log('Installing latest emulator.');
-  await exec.exec(`sh -c \\"sdkmanager --install emulator > /dev/null"`);
+  await exec.exec(`sh -c \\"sdkmanager --install emulator --channel=${channelId} > /dev/null"`);
 
   if (emulatorBuild) {
     console.log(`Installing emulator build ${emulatorBuild}.`);
@@ -53,14 +53,14 @@ export async function installAndroidSdk(apiLevel: number, target: string, arch:
     await io.rmRF('emulator.zip');
   }
   console.log('Installing system images.');
-  await exec.exec(`sh -c \\"sdkmanager --install 'system-images;android-${apiLevel};${target};${arch}' > /dev/null"`);
+  await exec.exec(`sh -c \\"sdkmanager --install 'system-images;android-${apiLevel};${target};${arch}' --channel=${channelId} > /dev/null"`);
 
   if (ndkVersion) {
     console.log(`Installing NDK ${ndkVersion}.`);
-    await exec.exec(`sh -c \\"sdkmanager --install 'ndk;${ndkVersion}' > /dev/null"`);
+    await exec.exec(`sh -c \\"sdkmanager --install 'ndk;${ndkVersion}' --channel=${channelId} > /dev/null"`);
   }
   if (cmakeVersion) {
     console.log(`Installing CMake ${cmakeVersion}.`);
-    await exec.exec(`sh -c \\"sdkmanager --install 'cmake;${cmakeVersion}' > /dev/null"`);
+    await exec.exec(`sh -c \\"sdkmanager --install 'cmake;${cmakeVersion}' --channel=${channelId} > /dev/null"`);
   }
 }