From da702da525174286947831d5f8ececbc01fdf5c6 Mon Sep 17 00:00:00 2001
From: Samuel Giddins <segiddins@segiddins.me>
Date: Tue, 9 May 2017 18:14:40 -0500
Subject: [Mirror] Properly handle casing of file URIs

---
 lib/bundler/mirror.rb         |  5 +++--
 lib/bundler/settings.rb       |  2 +-
 spec/bundler/settings_spec.rb | 16 ++++++++++++++++
 3 files changed, 20 insertions(+), 3 deletions(-)

diff --git a/lib/bundler/mirror.rb b/lib/bundler/mirror.rb
index 9903e158ab..8a081ba91f 100644
--- a/lib/bundler/mirror.rb
+++ b/lib/bundler/mirror.rb
@@ -45,7 +45,8 @@ module Bundler
     private
 
       def fetch_valid_mirror_for(uri)
-        mirror = @mirrors[uri.to_s.downcase] || @mirrors[URI(uri.to_s).host] || Mirror.new(uri)
+        downcased = uri.to_s.downcase
+        mirror = @mirrors[downcased] || @mirrors[URI(downcased).host] || Mirror.new(uri)
         mirror.validate!(@prober)
         mirror = Mirror.new(uri) unless mirror.valid?
         mirror
@@ -72,7 +73,7 @@ module Bundler
         @uri = if uri.nil?
           nil
         else
-          URI(uri.to_s.downcase)
+          URI(uri.to_s)
         end
         @valid = nil
       end
diff --git a/lib/bundler/settings.rb b/lib/bundler/settings.rb
index 81cbb3953c..62c21a2ecb 100644
--- a/lib/bundler/settings.rb
+++ b/lib/bundler/settings.rb
@@ -344,7 +344,7 @@ module Bundler
       unless uri.absolute?
         raise ArgumentError, format("Gem sources must be absolute. You provided '%s'.", uri)
       end
-      "#{prefix}#{uri}#{suffix}".downcase
+      "#{prefix}#{uri}#{suffix}"
     end
   end
 end
diff --git a/spec/bundler/settings_spec.rb b/spec/bundler/settings_spec.rb
index ec01827500..a93c41b7d2 100644
--- a/spec/bundler/settings_spec.rb
+++ b/spec/bundler/settings_spec.rb
@@ -184,6 +184,22 @@ that would suck --ehhh=oh geez it looks like i might have broken bundler somehow
       it "is case insensitive" do
         expect(settings.mirror_for("HTTPS://RUBYGEMS.ORG/")).to eq(mirror_uri)
       end
+
+      context "with a file URI" do
+        let(:mirror_uri) { URI("file:/foo/BAR/baz/qUx/") }
+
+        it "returns the mirror URI" do
+          expect(settings.mirror_for(uri)).to eq(mirror_uri)
+        end
+
+        it "converts a string parameter to a URI" do
+          expect(settings.mirror_for("file:/foo/BAR/baz/qUx/")).to eq(mirror_uri)
+        end
+
+        it "normalizes the URI" do
+          expect(settings.mirror_for("file:/foo/BAR/baz/qUx")).to eq(mirror_uri)
+        end
+      end
     end
   end
 
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