Split repository search result on \n instead of $ to prevent the items of the...

Split repository search result on \n instead of $ to prevent the items of the array to start with a newline. Remove the strip from parsing the search result to keep result endlines.

changelogs/unreleased/44280-fix-code-search.yml

+---
+title: Fix search results stripping last endline when parsing the results
+merge_request: 17777
+author: Jasper Maes
+type: fixed

lib/gitlab/git/repository.rb

@@ -1389,7 +1389,7 @@ module Gitlab
         offset = 2
         args = %W(grep -i -I -n -z --before-context #{offset} --after-context #{offset} -E -e #{Regexp.escape(query)} #{ref || root_ref})
 
-        run_git(args).first.scrub.split(/^--$/)
+        run_git(args).first.scrub.split(/^--\n/)
       end
 
       def can_be_merged?(source_sha, target_branch)

lib/gitlab/project_search_results.rb

@@ -58,7 +58,7 @@ module Gitlab
       data = ""
       startline = 0
 
-      result.strip.each_line.each_with_index do |line, index|
+      result.each_line.each_with_index do |line, index|
         prefix ||= line.match(/^(?<ref>[^:]*):(?<filename>.*)\x00(?<startline>\d+)\x00/)&.tap do |matches|
           ref = matches[:ref]
           filename = matches[:filename]

spec/lib/gitlab/project_search_results_spec.rb

@@ -83,19 +83,19 @@ describe Gitlab::ProjectSearchResults do
       end
 
       context 'when the matching filename contains a colon' do
-        let(:search_result) { "\nmaster:testdata/project::function1.yaml\x001\x00---\n" }
+        let(:search_result) { "master:testdata/project::function1.yaml\x001\x00---\n" }
 
         it 'returns a valid FoundBlob' do
           expect(subject.filename).to eq('testdata/project::function1.yaml')
           expect(subject.basename).to eq('testdata/project::function1')
           expect(subject.ref).to eq('master')
           expect(subject.startline).to eq(1)
-          expect(subject.data).to eq('---')
+          expect(subject.data).to eq("---\n")
         end
       end
 
       context 'when the matching content contains a number surrounded by colons' do
-        let(:search_result) { "\nmaster:testdata/foo.txt\x001\x00blah:9:blah" }
+        let(:search_result) { "master:testdata/foo.txt\x001\x00blah:9:blah" }
 
         it 'returns a valid FoundBlob' do
           expect(subject.filename).to eq('testdata/foo.txt')
@@ -106,6 +106,18 @@ describe Gitlab::ProjectSearchResults do
         end
       end
 
+      context 'when the search result ends with an empty line' do
+        let(:results) { project.repository.search_files_by_content('Role models', 'master') }
+
+        it 'returns a valid FoundBlob that ends with an empty line' do
+          expect(subject.filename).to eq('files/markdown/ruby-style-guide.md')
+          expect(subject.basename).to eq('files/markdown/ruby-style-guide')
+          expect(subject.ref).to eq('master')
+          expect(subject.startline).to eq(1)
+          expect(subject.data).to eq("# Prelude\n\n> Role models are important. <br/>\n> -- Officer Alex J. Murphy / RoboCop\n\n")
+        end
+      end
+
       context 'when the search returns non-ASCII data' do
         context 'with UTF-8' do
           let(:results) { project.repository.search_files_by_content('файл', 'master') }
@@ -115,7 +127,7 @@ describe Gitlab::ProjectSearchResults do
             expect(subject.basename).to eq('encoding/russian')
             expect(subject.ref).to eq('master')
             expect(subject.startline).to eq(1)
-            expect(subject.data).to eq('Хороший файл')
+            expect(subject.data).to eq("Хороший файл\n")
           end
         end
 
@@ -139,7 +151,7 @@ describe Gitlab::ProjectSearchResults do
             expect(subject.basename).to eq('encoding/iso8859')
             expect(subject.ref).to eq('master')
             expect(subject.startline).to eq(1)
-            expect(subject.data).to eq("Äü\n\nfoo")
+            expect(subject.data).to eq("Äü\n\nfoo\n")
           end
         end
       end