add auto-cancel for pending pipelines on branch, if they are not HEAD

fix changelog MR reference

add non-HEAD builds finder and add `created` pipelines to scope

add spec for auto-cancel non-HEAD pipelines and refactor create_pipeline_service_spec

more refactoring for spec

adds option for auto-cancel into CI/CD settings

fix spec to new configuration

fix rubocop

fix schema.rb

fix schema.rb

replace Gitlab 9.0 with 9.1 in doc

change wording on pipeline settings

added auto_canceled_by field as identifier of autocancel subject

remove unnecessary index

replace service with retry_lock

replace auto_cancel_pending_pipelines boolean setting with integer (and enum in model)

fix schema.rb

fix schema.rb

remove projekt attribute and clean up spec

clean up spec withcouple of shared examples

added spec for "It does not cancel current pipeline" scenario

add some specs to auto-cancel

add spec for another branch pipelines

1 files changed, 13 insertions, 4 deletions

diff --git a/app/views/projects/pipelines_settings/_show.html.haml b/app/views/projects/pipelines_settings/_show.html.haml
index 132f6372e40..a3f84476dea 100644
--- a/app/views/projects/pipelines_settings/_show.html.haml
+++ b/app/views/projects/pipelines_settings/_show.html.haml
@@ -21,7 +21,7 @@
             Git strategy for pipelines
           %p
             Choose between <code>clone</code> or <code>fetch</code> to get the recent application code
-            = link_to icon('question-circle'), help_page_path('user/project/pipelines/settings', anchor: 'git-strategy')
+            = link_to icon('question-circle'), help_page_path('user/project/pipelines/settings', anchor: 'git-strategy'), target: '_blank'
           .radio
             = f.label :build_allow_git_fetch_false do
               = f.radio_button :build_allow_git_fetch, 'false'
@@ -43,7 +43,7 @@
           = f.number_field :build_timeout_in_minutes, class: 'form-control', min: '0'
           %p.help-block
             Per job in minutes. If a job passes this threshold, it will be marked as failed.
-            = link_to icon('question-circle'), help_page_path('user/project/pipelines/settings', anchor: 'timeout')
+            = link_to icon('question-circle'), help_page_path('user/project/pipelines/settings', anchor: 'timeout'), target: '_blank'
 
         %hr
         .form-group
@@ -53,7 +53,16 @@
               %strong Public pipelines
             .help-block
               Allow everyone to access pipelines for public and internal projects
-              = link_to icon('question-circle'), help_page_path('user/project/pipelines/settings', anchor: 'visibility-of-pipelines')
+              = link_to icon('question-circle'), help_page_path('user/project/pipelines/settings', anchor: 'visibility-of-pipelines'), target: '_blank'
+        %hr
+        .form-group
+          .checkbox
+            = f.label :auto_cancel_pending_pipelines do
+              = f.check_box :auto_cancel_pending_pipelines, {}, 'enabled', 'disabled'
+              %strong Auto-cancel redundant, pending pipelines
+            .help-block
+              New pipelines will cancel older, pending pipelines on the same branch
+              = link_to icon('question-circle'), help_page_path('user/project/pipelines/settings', anchor: 'auto-cancel-pending-pipelines'), target: '_blank'
 
         %hr
         .form-group
@@ -65,7 +74,7 @@
           %p.help-block
             A regular expression that will be used to find the test coverage
             output in the job trace. Leave blank to disable
-            = link_to icon('question-circle'), help_page_path('user/project/pipelines/settings', anchor: 'test-coverage-parsing')
+            = link_to icon('question-circle'), help_page_path('user/project/pipelines/settings', anchor: 'test-coverage-parsing'), target: '_blank'
           .bs-callout.bs-callout-info
             %p Below are examples of regex for existing tools:
             %ul