Enable new RPC to retrieve wiki#find_file

In this commit we remove the feature flag gitaly_find_file,
that will remove entirely the old RPC wiki_find_page and use
the new one.

app/models/wiki.rb

@@ -160,16 +160,12 @@ class Wiki
   end
 
   def find_file(name, version = 'HEAD', load_content: true)
-    if Feature.enabled?(:gitaly_find_file, user, default_enabled: :yaml)
-      data_limit = load_content ? -1 : 0
-      blobs = repository.blobs_at([[version, name]], blob_size_limit: data_limit)
+    data_limit = load_content ? -1 : 0
+    blobs = repository.blobs_at([[version, name]], blob_size_limit: data_limit)
 
-      return if blobs.empty?
+    return if blobs.empty?
 
-      Gitlab::Git::WikiFile.from_blob(blobs.first)
-    else
-      wiki.file(name, version)
-    end
+    Gitlab::Git::WikiFile.new(blobs.first)
   end
 
   def create_page(title, content, format = :markdown, message = nil)

changelogs/unreleased/324306-fj-enable-gitaly-find-file-feature-flag.yml

+---
+title: Enable new RPC call to retrieve wiki files
+merge_request: 56491
+author:
+type: changed

config/feature_flags/development/gitaly_find_file.yml

----
-name: gitaly_find_file
-introduced_by_url: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/56321
-rollout_issue_url:
-milestone: '13.10'
-type: development
-group: group::editor
-default_enabled: false

lib/gitlab/git/wiki.rb

@@ -102,12 +102,6 @@ module Gitlab
         end
       end
 
-      def file(name, version)
-        wrapped_gitaly_errors do
-          gitaly_find_file(name, version)
-        end
-      end
-
       # options:
       #  :page     - The Integer page number.
       #  :per_page - The number of items per page.
@@ -161,13 +155,6 @@ module Gitlab
         nil
       end
 
-      def gitaly_find_file(name, version)
-        wiki_file = gitaly_wiki_client.find_file(name, version)
-        return unless wiki_file
-
-        Gitlab::Git::WikiFile.new(wiki_file)
-      end
-
       def gitaly_list_pages(limit: 0, sort: nil, direction_desc: false, load_content: false)
         params = { limit: limit, sort: sort, direction_desc: direction_desc }
 

lib/gitlab/git/wiki_file.rb

@@ -5,25 +5,11 @@ module Gitlab
     class WikiFile
       attr_reader :mime_type, :raw_data, :name, :path
 
-      # This class wraps Gitlab::GitalyClient::WikiFile
-      def initialize(gitaly_file)
-        @mime_type = gitaly_file.mime_type
-        @raw_data = gitaly_file.raw_data
-        @name = gitaly_file.name
-        @path = gitaly_file.path
-      end
-
-      def self.from_blob(blob)
-        hash = {
-          name: File.basename(blob.name),
-          mime_type: blob.mime_type,
-          path: blob.path,
-          raw_data: blob.data
-        }
-
-        gitaly_file = Gitlab::GitalyClient::WikiFile.new(hash)
-
-        Gitlab::Git::WikiFile.new(gitaly_file)
+      def initialize(blob)
+        @mime_type = blob.mime_type
+        @raw_data = blob.data
+        @name = File.basename(blob.name)
+        @path = blob.path
       end
     end
   end

lib/gitlab/gitaly_client/attributes_bag.rb

@@ -3,7 +3,7 @@
 module Gitlab
   module GitalyClient
     # This module expects an `ATTRS` const to be defined on the subclass
-    # See GitalyClient::WikiFile for an example
+    # See GitalyClient::WikiPage for an example
     module AttributesBag
       extend ActiveSupport::Concern
 

lib/gitlab/gitaly_client/wiki_file.rb

-# frozen_string_literal: true
-
-module Gitlab
-  module GitalyClient
-    class WikiFile
-      ATTRS = %i(name mime_type path raw_data).freeze
-
-      include AttributesBag
-    end
-  end
-end

lib/gitlab/gitaly_client/wiki_service.rb

@@ -153,32 +153,6 @@ module Gitlab
         versions
       end
 
-      def find_file(name, revision)
-        request = Gitaly::WikiFindFileRequest.new(
-          repository: @gitaly_repo,
-          name: encode_binary(name),
-          revision: encode_binary(revision)
-        )
-
-        response = GitalyClient.call(@repository.storage, :wiki_service, :wiki_find_file, request, timeout: GitalyClient.fast_timeout)
-        wiki_file = nil
-
-        response.each do |message|
-          next unless message.name.present? || wiki_file
-
-          if wiki_file
-            wiki_file.raw_data = "#{wiki_file.raw_data}#{message.raw_data}"
-          else
-            wiki_file = GitalyClient::WikiFile.new(message.to_h)
-            # All gRPC strings in a response are frozen, so we get
-            # an unfrozen version here so appending in the else clause below doesn't blow up.
-            wiki_file.raw_data = wiki_file.raw_data.dup
-          end
-        end
-
-        wiki_file
-      end
-
       private
 
       # If a block is given and the yielded value is truthy, iteration will be

spec/benchmarks/banzai_benchmark.rb

@@ -54,9 +54,10 @@ RSpec.describe 'GitLab Markdown Benchmark', :aggregate_failures do
 
   context 'pipelines' do
     it 'benchmarks several pipelines' do
-      path = 'images/example.jpg'
-      gitaly_wiki_file = Gitlab::GitalyClient::WikiFile.new(path: path)
-      allow(wiki).to receive(:find_file).with(path, load_content: false).and_return(Gitlab::Git::WikiFile.new(gitaly_wiki_file))
+      name = 'example.jpg'
+      path = "images/#{name}"
+      blob = double(name: name, path: path, mime_type: 'image/jpeg', data: nil)
+      allow(wiki).to receive(:find_file).with(path, load_content: false).and_return(Gitlab::Git::WikiFile.new(blob))
       allow(wiki).to receive(:wiki_base_path) { '/namespace1/gitlabhq/wikis' }
 
       puts "\n--> Benchmarking Full, Wiki, and Plain pipelines\n"

spec/features/markdown/markdown_spec.rb

@@ -288,9 +288,10 @@ RSpec.describe 'GitLab Markdown', :aggregate_failures do
       @wiki = @feat.wiki
       @wiki_page = @feat.wiki_page
 
-      path = 'images/example.jpg'
-      gitaly_wiki_file = Gitlab::GitalyClient::WikiFile.new(path: path)
-      expect(@wiki).to receive(:find_file).with(path, load_content: false).and_return(Gitlab::Git::WikiFile.new(gitaly_wiki_file))
+      name = 'example.jpg'
+      path = "images/#{name}"
+      blob = double(name: name, path: path, mime_type: 'image/jpeg', data: nil)
+      expect(@wiki).to receive(:find_file).with(path, load_content: false).and_return(Gitlab::Git::WikiFile.new(blob))
       allow(@wiki).to receive(:wiki_base_path) { '/namespace1/gitlabhq/wikis' }
 
       @html = markdown(@feat.raw_markdown, { pipeline: :wiki, wiki: @wiki, page_slug: @wiki_page.slug })

spec/lib/banzai/filter/gollum_tags_filter_spec.rb

@@ -16,12 +16,8 @@ RSpec.describe Banzai::Filter::GollumTagsFilter do
 
   context 'linking internal images' do
     it 'creates img tag if image exists' do
-      gollum_file_double = double('Gollum::File',
-                                  mime_type: 'image/jpeg',
-                                  name: 'images/image.jpg',
-                                  path: 'images/image.jpg',
-                                  raw_data: '')
-      wiki_file = Gitlab::Git::WikiFile.new(gollum_file_double)
+      blob = double(mime_type: 'image/jpeg', name: 'images/image.jpg', path: 'images/image.jpg', data: '')
+      wiki_file = Gitlab::Git::WikiFile.new(blob)
       expect(wiki).to receive(:find_file).with('images/image.jpg', load_content: false).and_return(wiki_file)
 
       tag = '[[images/image.jpg]]'

spec/lib/banzai/pipeline/wiki_pipeline_spec.rb

@@ -297,7 +297,7 @@ RSpec.describe Banzai::Pipeline::WikiPipeline do
           mime_type: 'image/jpeg',
           name: 'images/image.jpg',
           path: 'images/image.jpg',
-          raw_data: '')
+          data: '')
 
         wiki_file = Gitlab::Git::WikiFile.new(gollum_file_double)
         markdown = "[[#{wiki_file.path}]]"

spec/support/shared_examples/models/wiki_shared_examples.rb

@@ -354,33 +354,29 @@ RSpec.shared_examples 'wiki model' do
       subject.repository.create_file(user, 'image.png', image, branch_name: subject.default_branch, message: 'add image')
     end
 
-    shared_examples 'find_file results' do
-      it 'returns the latest version of the file if it exists' do
-        file = subject.find_file('image.png')
+    it 'returns the latest version of the file if it exists' do
+      file = subject.find_file('image.png')
 
-        expect(file.mime_type).to eq('image/png')
-      end
+      expect(file.mime_type).to eq('image/png')
+    end
 
-      it 'returns nil if the page does not exist' do
-        expect(subject.find_file('non-existent')).to eq(nil)
-      end
+    it 'returns nil if the page does not exist' do
+      expect(subject.find_file('non-existent')).to eq(nil)
+    end
 
-      it 'returns a Gitlab::Git::WikiFile instance' do
-        file = subject.find_file('image.png')
+    it 'returns a Gitlab::Git::WikiFile instance' do
+      file = subject.find_file('image.png')
 
-        expect(file).to be_a Gitlab::Git::WikiFile
-      end
+      expect(file).to be_a Gitlab::Git::WikiFile
+    end
 
-      it 'returns the whole file' do
-        file = subject.find_file('image.png')
-        image.rewind
+    it 'returns the whole file' do
+      file = subject.find_file('image.png')
+      image.rewind
 
-        expect(file.raw_data.b).to eq(image.read.b)
-      end
+      expect(file.raw_data.b).to eq(image.read.b)
     end
 
-    it_behaves_like 'find_file results'
-
     context 'when load_content is disabled' do
       it 'includes the file data in the Gitlab::Git::WikiFile' do
         file = subject.find_file('image.png', load_content: false)
@@ -388,14 +384,6 @@ RSpec.shared_examples 'wiki model' do
         expect(file.raw_data).to be_empty
       end
     end
-
-    context 'when feature flag :gitaly_find_file is disabled' do
-      before do
-        stub_feature_flags(gitaly_find_file: false)
-      end
-
-      it_behaves_like 'find_file results'
-    end
   end
 
   describe '#create_page' do