https://git.ruby-lang.org/ruby.git/commit/?id=ef2d673052

From ef2d673052ebc0c1d450c15286bc8fdee5381383 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?David=20Rodr=C3=ADguez?= <deivid.rodriguez@r...>
Date: Fri, 15 Jul 2022 20:18:40 +0200
Subject: [rubygems/rubygems] Show a proper error if extension dir is not
 writable

Instead of showing the bug report template.

https://github.com/rubygems/rubygems/commit/0c8b6f7dd5
---
 lib/bundler/rubygems_gem_installer.rb | 14 +++++++++-----
 spec/bundler/commands/install_spec.rb | 30 ++++++++++++++++++++++++++++++
 2 files changed, 39 insertions(+), 5 deletions(-)

diff --git a/lib/bundler/rubygems_gem_installer.rb b/lib/bundler/rubygems_gem_installer.rb
index 098ef0a356..12cc809664 100644
--- a/lib/bundler/rubygems_gem_installer.rb
+++ b/lib/bundler/rubygems_gem_installer.rb
@@ -66,8 +66,9 @@ module Bundler https://github.com/ruby/ruby/blob/trunk/lib/bundler/rubygems_gem_installer.rb#L66
 
     def build_extensions
       extension_cache_path = options[:bundler_extension_cache_path]
-      unless extension_cache_path && extension_dir = spec.extension_dir
-        prepare_extension_build
+      extension_dir = spec.extension_dir
+      unless extension_cache_path && extension_dir
+        prepare_extension_build(extension_dir)
         return super
       end
 
@@ -76,10 +77,10 @@ module Bundler https://github.com/ruby/ruby/blob/trunk/lib/bundler/rubygems_gem_installer.rb#L77
       if build_complete && !options[:force]
         SharedHelpers.filesystem_access(extension_dir.parent, &:mkpath)
         SharedHelpers.filesystem_access(extension_cache_path) do
-          FileUtils.cp_r extension_cache_path, spec.extension_dir
+          FileUtils.cp_r extension_cache_path, extension_dir
         end
       else
-        prepare_extension_build
+        prepare_extension_build(extension_dir)
         super
         SharedHelpers.filesystem_access(extension_cache_path.parent, &:mkpath)
         SharedHelpers.filesystem_access(extension_cache_path) do
@@ -98,7 +99,10 @@ module Bundler https://github.com/ruby/ruby/blob/trunk/lib/bundler/rubygems_gem_installer.rb#L99
 
     private
 
-    def prepare_extension_build
+    def prepare_extension_build(extension_dir)
+      SharedHelpers.filesystem_access(extension_dir, :create) do
+        FileUtils.mkdir_p extension_dir
+      end
       require "shellwords" unless Bundler.rubygems.provides?(">= 3.2.25")
     end
 
diff --git a/spec/bundler/commands/install_spec.rb b/spec/bundler/commands/install_spec.rb
index 4a48187db0..57cff4e3b3 100644
--- a/spec/bundler/commands/install_spec.rb
+++ b/spec/bundler/commands/install_spec.rb
@@ -723,6 +723,36 @@ RSpec.describe "bundle install with gem sources" do https://github.com/ruby/ruby/blob/trunk/spec/bundler/commands/install_spec.rb#L723
     end
   end
 
+  describe "when bundle extensions path does not have write access", :permissions do
+    let(:extensions_path) { bundled_app("vendor/#{Bundler.ruby_scope}/extensions/#{Gem::Platform.local}/#{Gem.extension_api_version}") }
+
+    before do
+      FileUtils.mkdir_p(extensions_path)
+      gemfile <<-G
+        source "#{file_uri_for(gem_repo1)}"
+        gem 'simple_binary'
+      G
+    end
+
+    it "should display a proper message to explain the problem" do
+      FileUtils.chmod("-x", extensions_path)
+      bundle "config set --local path vendor"
+
+      begin
+        bundle :install, :raise_on_error => false
+      ensure
+        FileUtils.chmod("+x", extensions_path)
+      end
+
+      expect(err).not_to include("ERROR REPORT TEMPLATE")
+
+      expect(err).to include(
+        "There was an error while trying to create `#{extensions_path.join("simple_binary-1.0")}`. " \
+        "It is likely that you need to grant executable permissions for all parent directories and write permissions for `#{extensions_path}`."
+      )
+    end
+  end
+
   describe "when the path of a specific gem is not writable", :permissions do
     let(:gems_path) { bundled_app("vendor/#{Bundler.ruby_scope}/gems") }
     let(:foo_path) { gems_path.join("foo-1.0.0") }
-- 
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