Respect autocrlf setting when creating/updating file through web UI

app/models/repository.rb

@@ -1230,6 +1230,14 @@ class Repository
                   action[:content]
                 end
 
+      detect = CharlockHolmes::EncodingDetector.new.detect(content) if content
+
+      unless detect && detect[:type] == :binary
+        # When writing to the repo directly as we are doing here,
+        # the `core.autocrlf` config isn't taken into account.
+        content.gsub!("\r\n", "\n") if self.autocrlf
+      end
+
       oid = rugged.write(content, :blob)
 
       index.add(path: path, oid: oid, mode: mode)

spec/models/repository_spec.rb

@@ -351,6 +351,17 @@ describe Repository, models: true do
       expect(blob.data).to eq('Changelog!')
     end
 
+    it 'respects the autocrlf setting' do
+      repository.commit_file(user, 'hello.txt', "Hello,\r\nWorld",
+                             message: 'Add hello world',
+                             branch_name: 'master',
+                             update: true)
+
+      blob = repository.blob_at('master', 'hello.txt')
+
+      expect(blob.data).to eq("Hello,\nWorld")
+    end
+
     context "when an author is specified" do
       it "uses the given email/name to set the commit's author" do
         expect do