[Settings] Use an improved regexp to read config file

This will improve support for long values that get split across
multiple lines.
h/t to @jbodah for coming up with the crux of the changes

1 files changed, 14 insertions, 2 deletions

diff --git a/lib/bundler/settings.rb b/lib/bundler/settings.rb
index 175c9a76db..2eaf426fbb 100644
--- a/lib/bundler/settings.rb
+++ b/lib/bundler/settings.rb
@@ -221,12 +221,24 @@ module Bundler
       Pathname.new(@root).join("config") if @root
     end
 
+    CONFIG_REGEX = %r{ # rubocop:disable Style/RegexpLiteral
+      ^
+      (BUNDLE_.+):\s # the key
+      (['"]?) # optional opening quote
+      (.* # contents of the value
+        (?: # optionally, up until the next key
+          (\n(?!BUNDLE).+)*
+        )
+      )
+      \2 # matching closing quote
+      $
+    }xo
+
     def load_config(config_file)
       SharedHelpers.filesystem_access(config_file, :read) do
         valid_file = config_file && config_file.exist? && !config_file.size.zero?
         return {} if ignore_config? || !valid_file
-        config_regex = /^(BUNDLE_.+): (['"]?)(.*(?:\n(?!BUNDLE).+)?)\2$/
-        config_pairs = config_file.read.scan(config_regex).map do |m|
+        config_pairs = config_file.read.scan(CONFIG_REGEX).map do |m|
           key, _, value = m
           [convert_to_backward_compatible_key(key), value.gsub(/\s+/, " ").tr('"', "'")]
         end