Script to autogenerate Android and iOS resources for Ionic + Capacitor

capacitor-resources-script.js

/**
1. Run npm install cordova-res --save-dev
2. Create 1024x1024px icon at resources/icon.png
3. Create 2732x2732px splash at resources/splash.png
4. Add "resources": "cordova-res ios && cordova-res android && node scripts/capacitor-resources-script.js" to scripts in package.json
5. Copy to script below to scripts/capacitor-resources-script.js
6. Run sudo chmod -R 777 scripts/capacitor-resources-script.js
7. Run npm run resources
*/

const fs = require('fs');

const SOURCE_IOS_ICON = 'resources/ios/icon/';
const SOURCE_IOS_SPLASH = 'resources/ios/splash/';

const TARGET_IOS_ICON = 'ios/App/App/Assets.xcassets/AppIcon.appiconset/';
const TARGET_IOS_SPLASH = 'ios/App/App/Assets.xcassets/Splash.imageset/';

const SOURCE_ANDROID_ICON = 'resources/android/icon/';
const SOURCE_ANDROID_SPLASH = 'resources/android/splash/';

const TARGET_ANDROID_ICON = 'android/app/src/main/res/';
const TARGET_ANDROID_SPLASH = 'android/app/src/main/res/';

const IOS_ICONS = [
  { source: 'icon-20.png', target: 'AppIcon-20x20@1x.png' },
  { source: 'icon-20@2x.png', target: 'AppIcon-20x20@2x.png' },
  { source: 'icon-20@2x.png', target: 'AppIcon-20x20@2x-1.png' },
  { source: 'icon-20@3x.png', target: 'AppIcon-20x20@3x.png' },
  { source: 'icon-29.png', target: 'AppIcon-29x29@1x.png' },
  { source: 'icon-29@2x.png', target: 'AppIcon-29x29@2x.png' },
  { source: 'icon-29@2x.png', target: 'AppIcon-29x29@2x-1.png' },
  { source: 'icon-29@3x.png', target: 'AppIcon-29x29@3x.png' },
  { source: 'icon-40.png', target: 'AppIcon-40x40@1x.png' },
  { source: 'icon-40@2x.png', target: 'AppIcon-40x40@2x.png' },
  { source: 'icon-40@2x.png', target: 'AppIcon-40x40@2x-1.png' },
  { source: 'icon-40@3x.png', target: 'AppIcon-40x40@3x.png' },
  { source: 'icon-60@2x.png', target: 'AppIcon-60x60@2x.png' },
  { source: 'icon-60@3x.png', target: 'AppIcon-60x60@3x.png' },
  { source: 'icon-76.png', target: 'AppIcon-76x76@1x.png' },
  { source: 'icon-76@2x.png', target: 'AppIcon-76x76@2x.png' },
  { source: 'icon-83.5@2x.png', target: 'AppIcon-83.5x83.5@2x.png' },
  { source: 'icon-1024.png', target: 'AppIcon-512@2x.png' }
];
const IOS_SPLASHES = [
  { source: 'Default-Portrait@~ipadpro.png', target: 'splash-2732x2732.png' },
  { source: 'Default-Portrait@~ipadpro.png', target: 'splash-2732x2732-1.png' },
  { source: 'Default-Portrait@~ipadpro.png', target: 'splash-2732x2732-2.png' }
];

const ANDROID_ICONS = [
  { source: 'drawable-ldpi-icon.png', target: 'drawable-hdpi-icon.png' },
  { source: 'drawable-mdpi-icon.png', target: 'mipmap-mdpi/ic_launcher.png' },
  { source: 'drawable-mdpi-icon.png', target: 'mipmap-mdpi/ic_launcher_round.png' },
  { source: 'drawable-mdpi-icon.png', target: 'mipmap-mdpi/ic_launcher_foreground.png' },
  { source: 'drawable-hdpi-icon.png', target: 'mipmap-hdpi/ic_launcher.png' },
  { source: 'drawable-hdpi-icon.png', target: 'mipmap-hdpi/ic_launcher_round.png' },
  { source: 'drawable-hdpi-icon.png', target: 'mipmap-hdpi/ic_launcher_foreground.png' },
  { source: 'drawable-xhdpi-icon.png', target: 'mipmap-xhdpi/ic_launcher.png' },
  { source: 'drawable-xhdpi-icon.png', target: 'mipmap-xhdpi/ic_launcher_round.png' },
  { source: 'drawable-xhdpi-icon.png', target: 'mipmap-xhdpi/ic_launcher_foreground.png' },
  { source: 'drawable-xxhdpi-icon.png', target: 'mipmap-xxhdpi/ic_launcher.png' },
  { source: 'drawable-xxhdpi-icon.png', target: 'mipmap-xxhdpi/ic_launcher_round.png' },
  { source: 'drawable-xxhdpi-icon.png', target: 'mipmap-xxhdpi/ic_launcher_foreground.png' },
  { source: 'drawable-xxxhdpi-icon.png', target: 'mipmap-xxxhdpi/ic_launcher.png' },
  { source: 'drawable-xxxhdpi-icon.png', target: 'mipmap-xxxhdpi/ic_launcher_round.png' },
  { source: 'drawable-xxxhdpi-icon.png', target: 'mipmap-xxxhdpi/ic_launcher_foreground.png' }
];
const ANDROID_SPLASHES = [
  { source: 'drawable-land-mdpi-screen.png', target: 'drawable/splash.png' }, 
  { source: 'drawable-land-mdpi-screen.png', target: 'drawable-land-mdpi/splash.png' },
  { source: 'drawable-land-hdpi-screen.png', target: 'drawable-land-hdpi/splash.png' },
  { source: 'drawable-land-xhdpi-screen.png', target: 'drawable-land-xhdpi/splash.png' },
  { source: 'drawable-land-xxhdpi-screen.png', target: 'drawable-land-xxhdpi/splash.png' },
  { source: 'drawable-land-xxxhdpi-screen.png', target: 'drawable-land-xxxhdpi/splash.png' },
  { source: 'drawable-port-mdpi-screen.png', target: 'drawable-port-mdpi/splash.png' },
  { source: 'drawable-port-hdpi-screen.png', target: 'drawable-port-hdpi/splash.png' },
  { source: 'drawable-port-xhdpi-screen.png', target: 'drawable-port-xhdpi/splash.png' },
  { source: 'drawable-port-xxhdpi-screen.png', target: 'drawable-port-xxhdpi/splash.png' },
  { source: 'drawable-port-xxxhdpi-screen.png', target: 'drawable-port-xxxhdpi/splash.png' }
];

function copyImages(sourcePath, targetPath, images) {
  for (const icon of images) {
    let source = sourcePath + icon.source;
    let target = targetPath + icon.target;
    fs.copyFile(source, target, err => {
      if (err) throw err;
      console.log(`${source} >> ${target}`);
    });
  }
}

copyImages(SOURCE_IOS_ICON, TARGET_IOS_ICON, IOS_ICONS);
copyImages(SOURCE_IOS_SPLASH, TARGET_IOS_SPLASH, IOS_SPLASHES);

copyImages(SOURCE_ANDROID_ICON, TARGET_ANDROID_ICON, ANDROID_ICONS);
copyImages(SOURCE_ANDROID_SPLASH, TARGET_ANDROID_SPLASH, ANDROID_SPLASHES);