Move diffable? method from Repository to Diff::Filedm-diff-file-diffable

3 files changed, 38 insertions, 22 deletions

diff --git a/lib/gitlab/diff/file.rb b/lib/gitlab/diff/file.rb
index 2aef7fdaa35..4212a0dbe2e 100644
--- a/lib/gitlab/diff/file.rb
+++ b/lib/gitlab/diff/file.rb
@@ -58,19 +58,19 @@ module Gitlab
         diff_refs&.head_sha
       end
 
-      def content_sha
-        return old_content_sha if deleted_file?
-        return @content_sha if defined?(@content_sha)
+      def new_content_sha
+        return if deleted_file?
+        return @new_content_sha if defined?(@new_content_sha)
 
         refs = diff_refs || fallback_diff_refs
-        @content_sha = refs&.head_sha
+        @new_content_sha = refs&.head_sha
       end
 
-      def content_commit
-        return @content_commit if defined?(@content_commit)
+      def new_content_commit
+        return @new_content_commit if defined?(@new_content_commit)
 
-        sha = content_sha
-        @content_commit = repository.commit(sha) if sha
+        sha = new_content_commit
+        @new_content_commit = repository.commit(sha) if sha
       end
 
       def old_content_sha
@@ -88,13 +88,13 @@ module Gitlab
         @old_content_commit = repository.commit(sha) if sha
       end
 
-      def blob
-        return @blob if defined?(@blob)
+      def new_blob
+        return @new_blob if defined?(@new_blob)
 
-        sha = content_sha
-        return @blob = nil unless sha
+        sha = new_content_sha
+        return @new_blob = nil unless sha
 
-        repository.blob_at(sha, file_path)
+        @new_blob = repository.blob_at(sha, file_path)
       end
 
       def old_blob
@@ -106,6 +106,18 @@ module Gitlab
         @old_blob = repository.blob_at(sha, old_path)
       end
 
+      def content_sha
+        new_content_sha || old_content_sha
+      end
+
+      def content_commit
+        new_content_commit || old_content_commit
+      end
+
+      def blob
+        new_blob || old_blob
+      end
+
       attr_writer :highlighted_diff_lines
 
       # Array of Gitlab::Diff::Line objects
@@ -153,6 +165,18 @@ module Gitlab
       def file_identifier
         "#{file_path}-#{new_file?}-#{deleted_file?}-#{renamed_file?}"
       end
+
+      def diffable?
+        repository.attributes(file_path).fetch('diff') { true }
+      end
+
+      def binary?
+        old_blob&.binary? || new_blob&.binary?
+      end
+
+      def text?
+        !binary?
+      end
     end
   end
 end
diff --git a/lib/gitlab/diff/file_collection/merge_request_diff.rb b/lib/gitlab/diff/file_collection/merge_request_diff.rb
index 9a58b500a2c..fcda1fe2233 100644
--- a/lib/gitlab/diff/file_collection/merge_request_diff.rb
+++ b/lib/gitlab/diff/file_collection/merge_request_diff.rb
@@ -66,10 +66,7 @@ module Gitlab
         end
 
         def cacheable?(diff_file)
-          @merge_request_diff.present? &&
-            diff_file.blob &&
-            diff_file.blob.text? &&
-            @project.repository.diffable?(diff_file.blob)
+          @merge_request_diff.present? && diff_file.text? && diff_file.diffable?
         end
 
         def cache_key
diff --git a/lib/gitlab/git/repository.rb b/lib/gitlab/git/repository.rb
index 9d6adbdb4ac..85695d0a4df 100644
--- a/lib/gitlab/git/repository.rb
+++ b/lib/gitlab/git/repository.rb
@@ -962,11 +962,6 @@ module Gitlab
         end
       end
 
-      # Checks if the blob should be diffable according to its attributes
-      def diffable?(blob)
-        attributes(blob.path).fetch('diff') { blob.text? }
-      end
-
       # Returns the Git attributes for the given file path.
       #
       # See `Gitlab::Git::Attributes` for more information.