feat(webpack): auto fallback to commonjs via runtime detection

packages/webpack5/src/configuration/base.ts

@@ -10,9 +10,9 @@ import TerserPlugin from 'terser-webpack-plugin';
 
 import { getProjectFilePath, getProjectTSConfigPath } from '../helpers/project';
 import {
-	getAllDependencies,
 	getDependencyVersion,
 	hasDependency,
+	getResolvedDependencyVersionForCheck,
 } from '../helpers/dependencies';
 import { PlatformSuffixPlugin } from '../plugins/PlatformSuffixPlugin';
 import { applyFileReplacements } from '../helpers/fileReplacements';
@@ -40,7 +40,7 @@ export default function (config: Config, env: IWebpackEnv = _env): Config {
 	// set mode
 	config.mode(mode);
 
-	// use source map files with v9+
+	// use source map files by default with v9+
 	function useSourceMapFiles() {
 		if (mode === 'development') {
 			// in development we always use source-map files with v9+ runtimes
@@ -48,20 +48,53 @@ export default function (config: Config, env: IWebpackEnv = _env): Config {
 			env.sourceMap = 'source-map';
 		}
 	}
-	// determine target output by @nativescript/core version
+	// determine target output by @nativescript/* runtime version
 	// v9+ supports ESM output, anything below uses CommonJS
-	if (hasDependency('@nativescript/core')) {
-		const coreVersion = getDependencyVersion('@nativescript/core');
-		// ensure alpha/beta/rc versions are considered as well
-		if (coreVersion && !coreVersion.includes('9.0.0')) {
-			if (!satisfies(coreVersion, '>=9.0.0')) {
-				// @nativescript/core < 9 uses CommonJS output
-				env.commonjs = true;
-			} else {
+	if (
+		hasDependency('@nativescript/ios') ||
+		hasDependency('@nativescript/visionos') ||
+		hasDependency('@nativescript/android')
+	) {
+		const iosVersion = getDependencyVersion('@nativescript/ios');
+		const visionosVersion = getDependencyVersion('@nativescript/visionos');
+		const androidVersion = getDependencyVersion('@nativescript/android');
+
+		if (platform === 'ios') {
+			const iosResolved =
+				getResolvedDependencyVersionForCheck('@nativescript/ios', '9.0.0') ??
+				iosVersion ??
+				undefined;
+			if (iosResolved && satisfies(iosResolved, '>=9.0.0')) {
 				useSourceMapFiles();
+			} else {
+				env.commonjs = true;
+			}
+		} else if (platform === 'visionos') {
+			const visionosResolved =
+				getResolvedDependencyVersionForCheck(
+					'@nativescript/visionos',
+					'9.0.0',
+				) ??
+				visionosVersion ??
+				undefined;
+			if (visionosResolved && satisfies(visionosResolved, '>=9.0.0')) {
+				useSourceMapFiles();
+			} else {
+				env.commonjs = true;
+			}
+		} else if (platform === 'android') {
+			const androidResolved =
+				getResolvedDependencyVersionForCheck(
+					'@nativescript/android',
+					'9.0.0',
+				) ??
+				androidVersion ??
+				undefined;
+			if (androidResolved && satisfies(androidResolved, '>=9.0.0')) {
+				useSourceMapFiles();
+			} else {
+				env.commonjs = true;
 			}
-		} else {
-			useSourceMapFiles();
 		}
 	}
 

packages/webpack5/src/helpers/dependencies.ts

@@ -1,5 +1,6 @@
 import path from 'path';
 
+import { satisfies } from 'semver';
 import { getPackageJson, getProjectRootPath } from './project';
 
 // todo: memoize
@@ -67,3 +68,41 @@ export function getDependencyVersion(dependencyName: string): string | null {
 	}
 	return null;
 }
+
+/**
+ * Resolve a usable version string for checks (eg. semver.satisfies).
+ * Strategy:
+ *  - prefer installed package.json version (getDependencyVersion)
+ *  - fall back to declared version in project package.json (dependencies/devDependencies)
+ *  - if declared is a common dist-tag (alpha|beta|rc|next) return a 9.x prerelease
+ */
+export function getResolvedDependencyVersionForCheck(dependencyName: string, target: string): string | null {
+	// try installed
+	const installed = getDependencyVersion(dependencyName);
+	if (installed) {
+		return installed;
+	}
+
+	// try declared in project package.json
+	const pkg = getPackageJson();
+	const declared = (pkg.dependencies && pkg.dependencies[dependencyName]) || (pkg.devDependencies && pkg.devDependencies[dependencyName]);
+	if (!declared) {
+		return null;
+	}
+
+	// if declared already satisfies semver check, use it
+	try {
+		if (satisfies(declared, `>=${target}`)) {
+			return declared;
+		}
+	} catch (e) {
+		// ignore parse errors
+	}
+
+	// common dist-tags -> treat as prerelease of 9.x for the purpose of >=9 checks
+	if (/^(alpha|beta|rc|next)$/.test(String(declared))) {
+		return `${target}-0`;
+	}
+
+	return declared ?? null;
+}