From 79e8d91410d85509b554b0885f5bde6899c4b2da Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?David=20Rodr=C3=ADguez?= <deivid.rodriguez@riseup.net>
Date: Thu, 12 Aug 2021 22:45:45 +0200
Subject: [PATCH] [rubygems/rubygems] Delay cache access in `LockfileParser`

It's the only part that needs "root folder resultion" to figure out the
folder for the cache, but it's only needed for some things, so run that
logic lazily when needed.

https://github.com/rubygems/rubygems/commit/c7b9eae0bc
---
 lib/bundler/source/rubygems.rb | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/lib/bundler/source/rubygems.rb b/lib/bundler/source/rubygems.rb
index a8d2e26324..af82ca6b6c 100644
--- a/lib/bundler/source/rubygems.rb
+++ b/lib/bundler/source/rubygems.rb
@@ -10,7 +10,7 @@ module Bundler
       # Ask for X gems per API request
       API_REQUEST_SIZE = 50
 
-      attr_reader :remotes, :caches
+      attr_reader :remotes
 
       def initialize(options = {})
         @options = options
@@ -19,11 +19,14 @@ module Bundler
         @allow_remote = false
         @allow_cached = false
         @allow_local = options["allow_local"] || false
-        @caches = [cache_path, *Bundler.rubygems.gem_cache]
 
         Array(options["remotes"]).reverse_each {|r| add_remote(r) }
       end
 
+      def caches
+        @caches ||= [cache_path, *Bundler.rubygems.gem_cache]
+      end
+
       def local_only!
         @specs = nil
         @allow_local = true
@@ -324,9 +327,9 @@ module Bundler
 
       def cached_path(spec)
         global_cache_path = download_cache_path(spec)
-        @caches << global_cache_path if global_cache_path
+        caches << global_cache_path if global_cache_path
 
-        possibilities = @caches.map {|p| package_path(p, spec) }
+        possibilities = caches.map {|p| package_path(p, spec) }
         possibilities.find {|p| File.exist?(p) }
       end