From 23236536337670da935e23502124d6d15a65d152 Mon Sep 17 00:00:00 2001
From: Alexander Sieg <alex@xanderio.de>
Date: Mon, 11 Aug 2025 16:41:19 +0200
Subject: [PATCH] fetch-yarn-deps: follow relative redirects

---
 pkgs/build-support/node/fetch-yarn-deps/index.js | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/pkgs/build-support/node/fetch-yarn-deps/index.js b/pkgs/build-support/node/fetch-yarn-deps/index.js
index ea2f4a73ca12..1799fbc71d68 100755
--- a/pkgs/build-support/node/fetch-yarn-deps/index.js
+++ b/pkgs/build-support/node/fetch-yarn-deps/index.js
@@ -10,6 +10,7 @@ const path = require('path')
 const lockfile = require('./yarnpkg-lockfile.js')
 const { promisify } = require('util')
 const url = require('url')
+const { URL } = url;
 const { urlToName } = require('./common.js')
 
 const execFile = promisify(child_process.execFile)
@@ -20,7 +21,7 @@ const exec = async (...args) => {
   return res
 }
 
-const downloadFileHttps = (fileName, url, expectedHash, hashType = 'sha1') => {
+const downloadFileHttps = (fileName, url, expectedHash, verbose, hashType = 'sha1') => {
   return new Promise((resolve, reject) => {
     const get = (url, redirects = 0) => https.get(url, (res) => {
       if(redirects > 10) {
@@ -28,7 +29,9 @@ const downloadFileHttps = (fileName, url, expectedHash, hashType = 'sha1') => {
         return;
       }
       if(res.statusCode === 301 || res.statusCode === 302) {
-        return get(res.headers.location, redirects + 1)
+        const location = new URL(res.headers.location, url);
+        if (verbose) console.log('following redirect to ' + location);
+        return get(location, redirects + 1);
       }
       const file = fs.createWriteStream(fileName)
       const hash = crypto.createHash(hashType)
@@ -119,9 +122,9 @@ const downloadPkg = (pkg, verbose) => {
   } else if (url.startsWith('https://')) {
     if (typeof pkg.integrity === 'string' || pkg.integrity instanceof String) {
       const [ type, checksum ] = pkg.integrity.split('-')
-      return downloadFileHttps(fileName, url, Buffer.from(checksum, 'base64').toString('hex'), type)
+      return downloadFileHttps(fileName, url, Buffer.from(checksum, 'base64').toString('hex'), verbose, type)
     }
-    return downloadFileHttps(fileName, url, hash)
+    return downloadFileHttps(fileName, url, hash, verbose)
   } else if (url.startsWith('file:')) {
     console.warn(`ignoring unsupported file:path url "${url}"`)
   } else {