From e346d0f1f9b3b94302a06805ae6bbb18d95f1e6f Mon Sep 17 00:00:00 2001
From: Dirk Baeumer <dirkb@microsoft.com>
Date: Wed, 24 Nov 2021 21:44:29 +0100
Subject: [PATCH] Add script to prefetch headers for native module compile

---
 build/prefetchHeaders.js | 37 +++++++++++++++++++++++++++++++++++++
 package.json             |  3 ++-
 2 files changed, 39 insertions(+), 1 deletion(-)
 create mode 100644 build/prefetchHeaders.js

diff --git a/build/prefetchHeaders.js b/build/prefetchHeaders.js
new file mode 100644
index 00000000000..030f4aaf1d0
--- /dev/null
+++ b/build/prefetchHeaders.js
@@ -0,0 +1,37 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the MIT License. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+const path = require('path');
+const fs = require('fs');
+const cp = require('child_process');
+
+function installHeaders(rcFile) {
+	const lines = fs.readFileSync(rcFile, 'utf8').split(/\r\n?/g);
+	let disturl, target;
+	for (const line of lines) {
+		let match = line.match(/\s*disturl\s*(.*)$/);
+		if (match !== null && match.length >= 1) {
+			disturl = match[1];
+		}
+		match = line.match(/\s*target\s*(.*)$/);
+		if (match !== null && match.length >= 1) {
+			target = match[1];
+		}
+	}
+	if (disturl !== undefined && target !== undefined) {
+		console.log(`Pre-fetch headers for ${target} from ${disturl}`);
+		cp.execSync(`node-gyp install --dist-url ${disturl} ${target}`);
+	}
+}
+
+
+function main() {
+	installHeaders(path.join(__dirname, '..', '.yarnrc'));
+	installHeaders(path.join(__dirname, '..', 'remote', '.yarnrc'));
+}
+
+
+if (require.main === module) {
+	main();
+}
diff --git a/package.json b/package.json
index 129bab504cd..4ce4e25985f 100644
--- a/package.json
+++ b/package.json
@@ -55,7 +55,8 @@
     "minify-vscode-reh-web": "node --max_old_space_size=4095 ./node_modules/gulp/bin/gulp.js minify-vscode-reh-web",
     "hygiene": "node --max_old_space_size=4095 ./node_modules/gulp/bin/gulp.js hygiene",
     "core-ci": "node --max_old_space_size=4095 ./node_modules/gulp/bin/gulp.js core-ci",
-    "extensions-ci": "node --max_old_space_size=4095 ./node_modules/gulp/bin/gulp.js extensions-ci"
+    "extensions-ci": "node --max_old_space_size=4095 ./node_modules/gulp/bin/gulp.js extensions-ci",
+    "refetch-headers": "node build/prefetchHeaders.js"
   },
   "dependencies": {
     "@microsoft/applicationinsights-web": "^2.6.4",