feat(CLI): drop support for MainApplication.java

Author: floydkim

cli/commands/initCommand/initAndroid.js

@@ -2,6 +2,16 @@ const path = require('path');
 const fs = require('fs');
 const { EOL } = require('os');
 
+function modifyMainApplicationKt(mainApplicationContent) {
+    if (mainApplicationContent.includes('CodePush.getJSBundleFile()')) {
+        console.log('MainApplication.kt already has CodePush initialized.');
+        return mainApplicationContent;
+    }
+    return mainApplicationContent
+        .replace('import com.facebook.react.ReactApplication', `import com.facebook.react.ReactApplication${EOL}import com.microsoft.codepush.react.CodePush`)
+        .replace('override fun getJSMainModuleName(): String = "index"', `override fun getJSMainModuleName(): String = "index"${EOL}        override fun getJSBundleFile(): String = CodePush.getJSBundleFile()`)
+}
+
 async function initAndroid() {
     console.log('Running Android setup...');
     await applyMainApplication();
@@ -10,42 +20,30 @@ async function initAndroid() {
 async function applyMainApplication() {
     const mainApplicationPath = await findMainApplication();
     if (!mainApplicationPath) {
-        console.log('Could not find MainApplication.java or MainApplication.kt');
+        console.log('Could not find MainApplication.kt');
         return;
     }
 
-    const mainApplicationContent = fs.readFileSync(mainApplicationPath, 'utf-8');
-
     if (mainApplicationPath.endsWith('.java')) {
-        if (mainApplicationContent.includes('CodePush.getJSBundleFile()')) {
-            console.log('MainApplication.java already has CodePush initialized.');
-            return;
-        }
-        const newContent = mainApplicationContent
-            .replace('import com.facebook.react.ReactApplication;', `import com.facebook.react.ReactApplication;${EOL}import com.microsoft.codepush.react.CodePush;`)
-            .replace('new DefaultReactNativeHost(this) {', `new DefaultReactNativeHost(this) {${EOL}          @Override${EOL}          protected String getJSBundleFile() {${EOL}            return CodePush.getJSBundleFile();${EOL}          }${EOL}`)
-        fs.writeFileSync(mainApplicationPath, newContent);
-        console.log('Successfully updated MainApplication.java.');
-    } else if (mainApplicationPath.endsWith('.kt')) {
-        if (mainApplicationContent.includes('CodePush.getJSBundleFile()')) {
-            console.log('MainApplication.kt already has CodePush initialized.');
-            return;
-        }
-        const newContent = mainApplicationContent
-            .replace('import com.facebook.react.ReactApplication', `import com.facebook.react.ReactApplication${EOL}import com.microsoft.codepush.react.CodePush`)
-            .replace('override fun getJSMainModuleName(): String = "index"', `override fun getJSMainModuleName(): String = "index"${EOL}        override fun getJSBundleFile(): String = CodePush.getJSBundleFile()`)
-        fs.writeFileSync(mainApplicationPath, newContent);
-        console.log('Successfully updated MainApplication.kt.');
+        console.log('MainApplication.java is not supported. Please migrate to MainApplication.kt.');
+        return;
     }
+
+    const mainApplicationContent = fs.readFileSync(mainApplicationPath, 'utf-8');
+    const newContent = modifyMainApplicationKt(mainApplicationContent);
+    fs.writeFileSync(mainApplicationPath, newContent);
+    console.log('Successfully updated MainApplication.kt.');
 }
 
 async function findMainApplication() {
     const searchPath = path.join(process.cwd(), 'android', 'app', 'src', 'main', 'java');
     const files = fs.readdirSync(searchPath, { recursive: true });
-    const mainApplicationFile = files.find(file => file.endsWith('MainApplication.java') || file.endsWith('MainApplication.kt'));
+    // Support only .kt files
+    const mainApplicationFile = files.find(file => file.endsWith('MainApplication.kt'));
     return mainApplicationFile ? path.join(searchPath, mainApplicationFile) : null;
 }
 
 module.exports = {
-    initAndroid: initAndroid
+    initAndroid: initAndroid,
+    modifyMainApplicationKt,
 };