Store paths relative to CarrierWave.root

So the path on source installs cannot be too long for our column.

And fix the column length test since Route.path is limited to 255 chars, it doesn’t matter how many nested groups there are.

lib/gitlab/background_migration/populate_untracked_uploads.rb

@@ -90,7 +90,7 @@ module Gitlab
             matchd = path_relative_to_upload_dir.match(FILE_UPLOADER_PATH_PATTERN)
             matchd[0].sub(%r{\A/}, '') # remove leading slash
           else
-            path_relative_to_carrierwave_root
+            path
           end
         end
@@ -113,20 +113,16 @@ module Gitlab
         end
         def file_size
-          File.size(path)
+          absolute_path = File.join(CarrierWave.root, path)
+          File.size(absolute_path)
         end
         # Not including a leading slash
         def path_relative_to_upload_dir
-          base = %r{\A#{Regexp.escape(Gitlab::BackgroundMigration::PrepareUntrackedUploads::UPLOAD_DIR)}/}
+          base = %r{\A#{Regexp.escape(Gitlab::BackgroundMigration::PrepareUntrackedUploads::RELATIVE_UPLOAD_DIR)}/}
           @path_relative_to_upload_dir ||= path.sub(base, '')
         end
-        # Not including a leading slash
-        def path_relative_to_carrierwave_root
-          "uploads/#{path_relative_to_upload_dir}"
-        end
-
         private
         def matching_pattern_map

lib/gitlab/background_migration/prepare_untracked_uploads.rb

@@ -5,8 +5,12 @@ module Gitlab
       include Database::MigrationHelpers
       FILE_PATH_BATCH_SIZE = 500
-      UPLOAD_DIR = "#{CarrierWave.root}/uploads".freeze
+      RELATIVE_UPLOAD_DIR = "uploads".freeze
+      ABSOLUTE_UPLOAD_DIR = "#{CarrierWave.root}/#{RELATIVE_UPLOAD_DIR}".freeze
       FOLLOW_UP_MIGRATION = 'PopulateUntrackedUploads'.freeze
+      START_WITH_CARRIERWAVE_ROOT_REGEX = %r{\A#{CarrierWave.root}/}
+      EXCLUDED_HASHED_UPLOADS_PATH = "#{ABSOLUTE_UPLOAD_DIR}/@hashed/*".freeze
+      EXCLUDED_TMP_UPLOADS_PATH = "#{ABSOLUTE_UPLOAD_DIR}/tmp/*".freeze
       class UntrackedFile < ActiveRecord::Base
         include EachBatch
@@ -28,9 +32,9 @@ module Gitlab
       end
       def store_untracked_file_paths
-        return unless Dir.exist?(UPLOAD_DIR)
-        each_file_batch(UPLOAD_DIR, FILE_PATH_BATCH_SIZE) do |file_paths|
+        return unless Dir.exist?(ABSOLUTE_UPLOAD_DIR)
+        each_file_batch(ABSOLUTE_UPLOAD_DIR, FILE_PATH_BATCH_SIZE) do |file_paths|
           insert_file_paths(file_paths)
         end
       end
@@ -49,7 +53,7 @@ module Gitlab
         paths = []
         stdout.each_line("\0") do |line|
-          paths << line.chomp("\0")
+          paths << line.chomp("\0").sub(START_WITH_CARRIERWAVE_ROOT_REGEX, '')
           if paths.size >= batch_size
             yield(paths)
@@ -61,9 +65,7 @@ module Gitlab
       end
       def build_find_command(search_dir)
-        hashed_path = "#{UPLOAD_DIR}/@hashed/*"
-        tmp_path = "#{UPLOAD_DIR}/tmp/*"
-        cmd = %W[find #{search_dir} -type f ! ( -path #{hashed_path} -prune ) ! ( -path #{tmp_path} -prune ) -print0]
+        cmd = %W[find #{search_dir} -type f ! ( -path #{EXCLUDED_HASHED_UPLOADS_PATH} -prune ) ! ( -path #{EXCLUDED_TMP_UPLOADS_PATH} -prune ) -print0]
         cmd = %w[ionice -c Idle] + cmd if ionice_is_available?

spec/lib/gitlab/background_migration/prepare_untracked_uploads_spec.rb

@@ -47,6 +47,15 @@ describe Gitlab::BackgroundMigration::PrepareUntrackedUploads, :migration, :side
       end
     end
+    it 'adds files with paths relative to CarrierWave.root' do
+      Sidekiq::Testing.fake! do
+        described_class.new.perform
+        untracked_files_for_uploads.all.each do |file|
+          expect(file.path.start_with?('uploads/')).to be_truthy
+        end
+      end
+    end
+
     it 'does not add hashed files to the untracked_files_for_uploads table' do
       Sidekiq::Testing.fake! do
         described_class.new.perform
@@ -83,7 +92,7 @@ describe Gitlab::BackgroundMigration::PrepareUntrackedUploads, :migration, :side
     # E.g. The installation is in use at the time of migration, and someone has
     # just uploaded a file
     context 'when there are files in /uploads/tmp' do
-      let(:tmp_file) { Rails.root.join(described_class::UPLOAD_DIR, 'tmp', 'some_file.jpg') }
+      let(:tmp_file) { Rails.root.join(described_class::ABSOLUTE_UPLOAD_DIR, 'tmp', 'some_file.jpg') }
       before do
         FileUtils.touch(tmp_file)

spec/migrations/track_untracked_uploads_spec.rb

@@ -41,15 +41,13 @@ describe TrackUntrackedUploads, :migration, :sidekiq do
     component = 'a'*255
     long_path = [
-      CarrierWave.root,
       'uploads',
-      [component] * Namespace::NUMBER_OF_ANCESTORS_ALLOWED, # namespaces
-      component, # project
+      component, # project.full_path
       component  # filename
     ].flatten.join('/')
     record = UntrackedFile.create!(path: long_path)
-    expect(record.reload.path.size).to eq(5711)
+    expect(record.reload.path.size).to eq(519)
   end
   context 'with tracked and untracked uploads' do