Use `@diff_notes_disabled` instead of `@comments_allowed`

app/controllers/projects/commit_controller.rb

@@ -22,7 +22,6 @@ class Projects::CommitController < Projects::ApplicationController
     @note = @project.build_commit_note(commit)
     @notes = commit.notes.non_diff_notes.fresh
     @noteable = @commit
-    @comments_allowed = true
     @comments_target  = {
       noteable_type: 'Commit',
       commit_id: @commit.id

app/controllers/projects/compare_controller.rb

@@ -22,6 +22,7 @@ class Projects::CompareController < Projects::ApplicationController
       @base_commit = @project.merge_base_commit(@base_ref, @head_ref)
       @diffs = compare.diffs(diff_options)
       @diff_refs = [@base_commit, @commit]
+      @diff_notes_disabled = true
       @grouped_diff_notes = {}
     end
   end

app/controllers/projects/merge_requests_controller.rb

@@ -73,7 +73,6 @@ class Projects::MergeRequestsController < Projects::ApplicationController
     # but we need it for the "View file @ ..." link by deleted files
     @base_commit ||= @merge_request.first_commit.parent || @merge_request.first_commit
 
-    @comments_allowed = true
     @comments_target = {
       noteable_type: 'MergeRequest',
       noteable_id: @merge_request.id
@@ -118,6 +117,7 @@ class Projects::MergeRequestsController < Projects::ApplicationController
     @commit = @merge_request.last_commit
     @base_commit = @merge_request.diff_base_commit
     @diffs = @merge_request.compare.diffs(diff_options) if @merge_request.compare
+    @diff_notes_disabled = true
 
     @ci_commit = @merge_request.ci_commit
     @statuses = @ci_commit.statuses if @ci_commit

app/views/projects/diffs/_line.html.haml

@@ -15,7 +15,7 @@
         = link_text
       - else
         = link_to "", "##{line_code}", id: line_code, data: { linenumber: link_text }
-      - if @comments_allowed && can?(current_user, :create_note, @project)
+      - if !@diff_notes_disabled && can?(current_user, :create_note, @project)
         = link_to_new_diff_note(line_code)
     %td.new_line.diff-line-num{ class: type, data: { linenumber: line.new_pos } }
       - link_text = type == "old" ? " ".html_safe : line.new_pos

app/views/projects/diffs/_parallel_view.html.haml

@@ -16,7 +16,7 @@
         - else
           %td.old_line.diff-line-num{id: left[:line_code], class: "#{left[:type]} #{'empty-cell' if !left[:number]}"}
             = link_to raw(left[:number]), "##{left[:line_code]}", id: left[:line_code]
-            - if @comments_allowed && can?(current_user, :create_note, @project)
+            - if !@diff_notes_disabled && can?(current_user, :create_note, @project)
               = link_to_new_diff_note(left[:line_code], 'old')
           %td.line_content{class: "parallel noteable_line #{left[:type]} #{left[:line_code]} #{'empty-cell' if left[:text].empty?}", data: { line_code: left[:line_code] }}= diff_line_content(left[:text])
 
@@ -29,11 +29,11 @@
 
           %td.new_line.diff-line-num{id: new_line_code, class: "#{new_line_class} #{'empty-cell' if !right[:number]}", data: { linenumber: right[:number] }}
             = link_to raw(right[:number]), "##{new_line_code}", id: new_line_code
-            - if @comments_allowed && can?(current_user, :create_note, @project)
+            - if !@diff_notes_disabled && can?(current_user, :create_note, @project)
               = link_to_new_diff_note(new_line_code, 'new')
           %td.line_content.parallel{class: "noteable_line #{new_line_class} #{new_line_code} #{'empty-cell' if right[:text].empty?}", data: { line_code: new_line_code }}= diff_line_content(right[:text])
 
-      - if @comments_allowed
+      - unless @diff_notes_disabled
         - notes_left, notes_right = organize_comments(left, right)
         - if notes_left.present? || notes_right.present?
           = render "projects/notes/diff_notes_with_reply_parallel", notes_left: notes_left, notes_right: notes_right

app/views/projects/diffs/_text_file.html.haml

@@ -11,7 +11,7 @@
     - last_line = line.new_pos
     = render "projects/diffs/line", {line: line, diff_file: diff_file, line_code: line_code}
 
-    - if @comments_allowed
+    - unless @diff_notes_disabled
       - diff_notes = @grouped_diff_notes[line_code]
       - if diff_notes
         = render "projects/notes/diff_notes_with_reply", notes: diff_notes