Implement blame view for files

src/api/app/assets/stylesheets/webui/application.scss

@@ -76,6 +76,7 @@
 @import 'build-log';
 @import 'content-selector-filters';
 @import 'mixin';
+@import 'blame';
 
 html {
     overflow-y: scroll !important;

src/api/app/assets/stylesheets/webui/blame.scss

@@ -0,0 +1,45 @@
+.blame {
+  display: grid;
+  grid-template-columns: [time] max-content [user] 20px [commit] max-content [button] min-content [line] min-content [content] auto;
+  column-gap: 1rem;
+  .revision {
+    display: grid;
+    grid-template-columns: subgrid;
+    grid-column: time / span 6;
+    border-bottom: var(--bs-border-width) solid var(--bs-border-color);
+    .info {
+      display: grid;
+      grid-template-columns: subgrid;
+      grid-column: time / span 4;
+      .time {
+        grid-column-start: time;
+      }
+      .user {
+        grid-column-start: user;
+      }
+      .commit {
+        grid-column-start: commit;
+        max-width: 200px;
+      }
+      .button {
+        grid-column-start: button;
+      }
+    }
+    .code {
+      display: grid;
+      grid-template-columns: subgrid;
+      grid-column: line / span 2;
+      font-family: monospace;
+      white-space: pre;
+      text-wrap: wrap;
+      .number {
+        grid-column-start: line;
+        text-align: end;
+        user-select: none;
+      }
+      .content {
+        grid-column-start: content;
+      }
+    }
+  }
+}

src/api/app/controllers/webui/packages/files_controller.rb

@@ -7,12 +7,12 @@ class FilesController < Webui::WebuiController
       before_action :set_project
       before_action :check_scmsync, only: :show
       before_action :set_package
-      before_action :set_filename, only: %i[show update destroy]
-      before_action :ensure_existence, only: :show
-      before_action :ensure_viewable, only: :show
-      before_action :set_file, only: :show
+      before_action :set_filename, only: %i[show update destroy blame]
+      before_action :ensure_existence, only: %i[show blame]
+      before_action :ensure_viewable, only: %i[show blame]
+      before_action :set_file, only: %i[show blame]
 
-      after_action :verify_authorized, except: :show
+      after_action :verify_authorized, except: %i[show blame]
 
       def show
         @rev = params[:rev]
@@ -111,10 +111,34 @@ def destroy
         redirect_to package_show_path(project: @project, package: @package)
       end
 
+      def blame
+        blame_file = Backend::Api::Sources::Package.blame(@project.name, @package_name, @filename, params.slice(:rev, :expand).permit!)
+        # Regex to break apart the line into individual components
+        blame_parsed = blame_file.each_line.to_a.filter_map do |l|
+          match_line = /^\s*
+            (?<file>\d*:)? # File prefix (optional)
+            (?<revision>\d*)\s # Revision number
+            \(                 # Metadata in parenthesis
+              (?<login>\S+)\s+   # User login
+              (?<date>[\d-]+)\s  # Date, dash separated
+              (?<time>[\d:]+)\s+ # Time, colon separated
+              (?<line>\d+)       # Line number
+            \)\s
+            (?<content>.*)     # Content of the line
+          $/x
+          match_line.match(l)
+        end
+        revision_numbers = blame_parsed.pluck('revision').uniq.compact_blank
+        @revisions = revision_numbers.index_with { |r| @package.commit(r) }
+        @blame_info = blame_parsed.slice_when { |a, b| a['revision'] != b['revision'] }.to_a
+        @rev = params[:rev] || revision_numbers.max
+        @expand = params[:expand]
+      end
+
       private
 
       def set_filename
-        @filename = params[:filename]
+        @filename = params[:filename] || params[:file_filename]
       end
 
       def ensure_existence

src/api/app/lib/backend/api/sources/package.rb

@@ -140,6 +140,12 @@ def self.file(project_name, package_name, file_name)
           http_get(['/source/:project/:package/:filename', project_name, package_name, file_name])
         end
 
+        # Returns the content of the source file
+        # @return [String]
+        def self.blame(project_name, package_name, file_name, options = {})
+          http_get(['/source/:project/:package/:filename', project_name, package_name, file_name], defaults: { view: :blame }, params: options, accepted: %i[meta deleted expand rev view])
+        end
+
         # Writes the content of the source file
         # @return [String]
         def self.write_file(project_name, package_name, file_name, content = '', params = {})

src/api/app/views/webui/package/_file.html.haml

@@ -14,8 +14,11 @@
   / limit download for anonymous user to avoid getting killed by crawlers
   - unless nobody
     %td.text-center<
+      - if viewable_file?(file['name'], file['size'].to_i)
+        = link_to(project_package_file_blame_path(project, package, file['name'], expand: expand), title: 'Blame file') do
+          %i.fas.fa-fw.fa-file-waveform
       = link_to(file_url(project.name, package.name, file['name'], srcmd5), title: 'Download file', class: 'me-1') do
-        %i.fas.fa-download.text-secondary
+        %i.fas.fa-fw.fa-download.text-secondary
       - if can_be_removed
         = link_to('#', title: 'Delete file', data: { 'bs-toggle': 'modal',
                                                      'bs-target': '#delete-file-modal',
@@ -25,4 +28,4 @@
                                                                      project_name: project,
                                                                      package_name: package,
                                                                      filename: file['name']) }) do
-          %i.fas.fa-times-circle.text-danger
+          %i.fas.fa-fw.fa-times-circle.text-danger

src/api/app/views/webui/packages/files/blame.html.haml

@@ -0,0 +1,43 @@
+- @pagetitle = "Blame #{truncate(@filename, length: 50)} of Package #{truncate(@package.name, length: 50)}"
+
+.card.mb-3
+  = render partial: 'webui/package/tabs', locals: { project: @project, package: @package }
+  .card-body
+    %h3.text-word-break-all
+      Blame #{@filename} of Package #{@package}
+      - if @rev
+        (Revision #{@rev})
+    - if params[:rev]
+      %p
+        Currently displaying revision
+        %i= @rev
+        ,
+        = link_to('Show latest', expand: @expand)
+    // Coderay doesn't support rpmspec, which would be prerequisite here
+    -# code = CodeRay.scan(@file, :ruby).html.each_line.to_a
+    .blame
+      - @blame_info.each do |revision|
+        .revision
+          .info
+            - info = revision.first
+            .time= render TimeComponent.new(time: "#[info['date']} #{info['time']}".to_datetime)
+            .user
+              - if (user = User.find_by_login(info['login']))
+                = link_to(user_path(user)) do
+                  = render AvatarComponent.new(name: info['login'], email: user.email)
+            .commit.text-truncate
+              - rev = @revisions[info['revision']]
+              - if rev
+                = link_to(package_show_path(@project, @package_name, rev: info['revision'])) do
+                  - if rev['comment']
+                    = rev['comment']
+                  - else
+                    %i No commit message
+            .button
+              - if info['revision'].present? && info['revision'] != @rev
+                = link_to(project_package_file_blame_path(@project, @package_name, @filename, rev: info['revision'])) do
+                  %i.fas.fa-eye
+          .code.CodeRay<>
+            - revision.each do |line|
+              .number= line['line']
+              .content= line['content']

src/api/config/routes/webui.rb

@@ -284,7 +284,9 @@
       resources :deletions, controller: 'webui/requests/deletions', only: %i[new create], constraints: cons
       resources :devel_project_changes, controller: 'webui/requests/devel_project_changes', only: %i[new create], constraints: cons
       resources :submissions, controller: 'webui/requests/submissions', only: %i[new create], constraints: cons
-      resources :files, controller: 'webui/packages/files', only: %i[new create show update destroy], constraints: cons, param: :filename, format: false, defaults: { format: 'html' }
+      resources :files, controller: 'webui/packages/files', only: %i[new create show update destroy], constraints: cons, param: :filename, format: false, defaults: { format: 'html' } do
+        get :blame
+      end
       put 'toggle_watched_item', controller: 'webui/watched_items', constraints: cons
       resource :badge, controller: 'webui/packages/badge', only: [:show], constraints: cons.merge(format: :svg)
       resources :repositories, only: [], param: :name do