Added set to download/install/cache the android sdk tools for signing release builds

src/io-utils.ts

@@ -1,7 +1,33 @@
+import * as tc from '@actions/tool-cache'
+import * as core from '@actions/core'
+import * as exec from '@actions/exec'
 import {Dirent} from "fs";
+import fs from "fs";
+import * as path from "path";
 
-const path = require('path');
-const fs = require('fs');
+export async function downloadAndroidTools(toolsVersion: string = "4333796", buildToolsVersion: string = '29.0.2') {
+    const buildToolDir = tc.find('build-tools', buildToolsVersion);
+    if (buildToolDir.length == 0) {
+        const androidToolPath = await tc.downloadTool(`https://dl.google.com/android/repository/sdk-tools-linux-${toolsVersion}.zip`);
+        const androidToolExtractedFolder = await tc.extractZip(androidToolPath, 'android-sdk');
+        const cachedPath = await tc.cacheDir(androidToolExtractedFolder, 'android-sdk', toolsVersion);
+
+        core.addPath(cachedPath);
+        core.addPath(path.join(cachedPath, 'bin'));
+
+        // Install the platform tools
+        exec.exec('yes | sdkmanager --licenses');
+        exec.exec('yes | sdkmanager', [
+            `\"build-tools;${buildToolsVersion}\"`
+        ]);
+
+        // Add our new build tools to the exec path
+        const cachedBuildTools = await tc.cacheDir(path.join(cachedPath, `build-tools/${buildToolsVersion}`), "build-tools", buildToolsVersion);
+        core.addPath(cachedBuildTools)
+    } else {
+        core.addPath(buildToolDir)
+    }
+}
 
 export function findReleaseFile(releaseDir: string): Dirent | undefined {
     const releaseFiles = fs.readdirSync(releaseDir, {withFileTypes: true})
@@ -11,4 +37,5 @@ export function findReleaseFile(releaseDir: string): Dirent | undefined {
     if (releaseFiles.length > 0) {
         return releaseFiles[0]
     }
-}
+}
+

src/main.ts

@@ -19,11 +19,14 @@ async function run() {
     if (releaseFile !== undefined) {
       core.debug(`Found release to sign: ${releaseFile.name}`);
 
-      // 2. Now that we have a release file, decode and save the signing key
+      // 2. Install Android tools
+      await io.downloadAndroidTools();
+
+      // 3. Now that we have a release file, decode and save the signing key
       const signingKey = path.join(releaseDir, 'signingKey.jks');
       fs.writeFileSync(signingKey, signingKeyBase64, 'base64');
 
-      // 3. Now zipalign the release file
+      // 4. Now zipalign the release file
       const releaseFilePath = path.join(releaseDir, releaseFile.name);
       let signedReleaseFile = '';
       if (releaseFile.name.endsWith('.apk')) {