Show wall-clock time when showing pipeline instead of:

app/helpers/time_helper.rb

@@ -17,6 +17,11 @@ module TimeHelper
 
   def duration_in_numbers(finished_at, started_at)
     interval = interval_in_seconds(started_at, finished_at)
+
+    duration_in_numbers_from_interval(interval)
+  end
+
+  def duration_in_numbers_from_interval(interval)
     time_format = interval < 1.hour ? "%M:%S" : "%H:%M:%S"
 
     Time.at(interval).utc.strftime(time_format)

app/models/ci/pipeline.rb

@@ -213,6 +213,10 @@ module Ci
       ]
     end
 
+    def wall_clock_duration
+      finished_at.to_i - started_at.to_i if finished_at && started_at
+    end
+
     private
 
     def build_builds_for_stages(stages, user, status, trigger_request)

app/views/projects/ci/pipelines/_pipeline.html.haml

@@ -46,10 +46,10 @@
             \-
 
   %td
-    - if pipeline.started_at && pipeline.finished_at
+    - if pipeline.wall_clock_duration
       %p.duration
         = custom_icon("icon_timer")
-        = duration_in_numbers(pipeline.finished_at, pipeline.started_at)
+        = duration_in_numbers_from_interval(pipeline.wall_clock_duration)
     - if pipeline.finished_at
       %p.finished-at
         = icon("calendar")

app/views/projects/pipelines/_info.html.haml

@@ -7,9 +7,9 @@
   - if @pipeline.ref
     for
     = link_to @pipeline.ref, namespace_project_commits_path(@project.namespace, @project, @pipeline.ref), class: "monospace"
-  - if @pipeline.duration
+  - if @pipeline.wall_clock_duration
     in
-    = time_interval_in_words @pipeline.duration
+    = time_interval_in_words(@pipeline.wall_clock_duration)
 
   .pull-right
     = link_to namespace_project_pipeline_path(@project.namespace, @project, @pipeline), class: "ci-status ci-#{@pipeline.status}" do