fix(build): add riscv64/loong64/ppc64/s390x to REH targets and support unofficial Node.js builds

- Add riscv64, loong64, ppc64, s390x to BUILD_TARGETS in gulpfile.reh.ts so that
  gulp tasks (vscode-reh-linux-*-min-ci) are registered for these architectures.
- Update nodejs() to check VSCODE_NODEJS_SITE/VSCODE_NODEJS_URLROOT/VSCODE_NODEJS_URLSUFFIX
  env vars (set by package_reh.sh) so unofficial-builds.nodejs.org is used for
  architectures not available on nodejs.org (riscv64, loong64, x64-glibc-217).
- Fix win32ContextMenu null guard in gulpfile.vscode.ts to prevent TypeError when
  product.json lacks the win32ContextMenu field (not present in CortexIDE product.json).

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: Tajudeen

build/gulpfile.reh.ts

@@ -55,6 +55,10 @@ const BUILD_TARGETS = [
 	{ platform: 'linux', arch: 'x64' },
 	{ platform: 'linux', arch: 'armhf' },
 	{ platform: 'linux', arch: 'arm64' },
+	{ platform: 'linux', arch: 'riscv64' },
+	{ platform: 'linux', arch: 'loong64' },
+	{ platform: 'linux', arch: 'ppc64' },
+	{ platform: 'linux', arch: 's390x' },
 	{ platform: 'alpine', arch: 'arm64' },
 	// legacy: we use to ship only one alpine so it was put in the arch, but now we ship
 	// multiple alpine images and moved to a better model (alpine as the platform)
@@ -238,14 +242,28 @@ function nodejs(platform: string, arch: string): NodeJS.ReadWriteStream | undefi
 				fetchUrls(`/dist/v${nodeVersion}/win-${arch}/node.exe`, { base: 'https://nodejs.org', checksumSha256 }))
 				.pipe(rename('node.exe'));
 		case 'darwin':
-		case 'linux':
+		case 'linux': {
+			// Support unofficial Node.js builds (e.g. riscv64, loong64) via VSCODE_NODEJS_SITE env var.
+			// Set by package_reh.sh for architectures not available on nodejs.org.
+			const unofficialSite = process.env['VSCODE_NODEJS_SITE'];
+			const unofficialUrlRoot = process.env['VSCODE_NODEJS_URLROOT'];
+			const unofficialUrlSuffix = process.env['VSCODE_NODEJS_URLSUFFIX'] ?? '';
+			if (unofficialSite && unofficialUrlRoot) {
+				log(`Downloading node.js ${nodeVersion} ${platform} ${arch} from unofficial builds: ${unofficialSite}...`);
+				return fetchUrls(`${unofficialUrlRoot}/v${nodeVersion}/node-v${nodeVersion}-${platform}-${arch}${unofficialUrlSuffix}.tar.gz`, { base: unofficialSite, checksumSha256 })
+					.pipe(flatmap(stream => stream.pipe(gunzip()).pipe(untar())))
+					.pipe(filter('**/node'))
+					.pipe(util.setExecutableBit('**'))
+					.pipe(rename('node'));
+			}
 			return (product.nodejsRepository !== 'https://nodejs.org' ?
 				fetchGithub(product.nodejsRepository, { version: `${nodeVersion}-${internalNodeVersion}`, name: expectedName!, checksumSha256 }) :
 				fetchUrls(`/dist/v${nodeVersion}/node-v${nodeVersion}-${platform}-${arch}.tar.gz`, { base: 'https://nodejs.org', checksumSha256 })
 			).pipe(flatmap(stream => stream.pipe(gunzip()).pipe(untar())))
 				.pipe(filter('**/node'))
 				.pipe(util.setExecutableBit('**'))
 				.pipe(rename('node'));
+		}
 		case 'alpine':
 			return product.nodejsRepository !== 'https://nodejs.org' ?
 				fetchGithub(product.nodejsRepository, { version: `${nodeVersion}-${internalNodeVersion}`, name: expectedName!, checksumSha256 })

build/gulpfile.vscode.ts

@@ -611,7 +611,8 @@ function packageTask(platform: string, arch: string, sourceFolderName: string, d
 			result = es.merge(result, gulp.src('.build/policies/win32/**', { base: '.build/policies/win32' })
 				.pipe(rename(f => f.dirname = `policies/${f.dirname}`)));
 
-			if (quality === 'stable' || quality === 'insider') {
+			const win32ContextMenu = (product as { win32ContextMenu?: Record<string, { clsid: string }> }).win32ContextMenu;
+			if ((quality === 'stable' || quality === 'insider') && win32ContextMenu?.[arch]) {
 				result = es.merge(result, gulp.src('.build/win32/appx/**', { base: '.build/win32' }));
 				const rawVersion = version.replace(/-\w+$/, '').split('.');
 				const appxVersion = `${rawVersion[0]}.0.${rawVersion[1]}.${rawVersion[2]}`;
@@ -623,7 +624,7 @@ function packageTask(platform: string, arch: string, sourceFolderName: string, d
 					.pipe(replace('@@ApplicationIdShort@@', product.win32RegValueName))
 					.pipe(replace('@@ApplicationExe@@', product.nameShort + '.exe'))
 					.pipe(replace('@@FileExplorerContextMenuID@@', quality === 'stable' ? 'OpenWithCode' : 'OpenWithCodeInsiders'))
-					.pipe(replace('@@FileExplorerContextMenuCLSID@@', (product as { win32ContextMenu?: Record<string, { clsid: string }> }).win32ContextMenu![arch].clsid))
+					.pipe(replace('@@FileExplorerContextMenuCLSID@@', win32ContextMenu[arch].clsid))
 					.pipe(replace('@@FileExplorerContextMenuDLL@@', `${quality === 'stable' ? 'code' : 'code_insider'}_explorer_command_${arch}.dll`))
 					.pipe(rename(f => f.dirname = `appx/manifest`)));
 			}