Add MockCiService integrationmock-ci-service

MR: https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/9250/

See https://gitlab.com/madlittlemods/gl-mock-ci-service

8 files changed, 155 insertions, 3 deletions

diff --git a/app/controllers/concerns/service_params.rb b/app/controllers/concerns/service_params.rb
index e610ccaec96..2992568ae66 100644
--- a/app/controllers/concerns/service_params.rb
+++ b/app/controllers/concerns/service_params.rb
@@ -33,6 +33,7 @@ module ServiceParams
     :issues_url,
     :jira_issue_transition_id,
     :merge_requests_events,
+    :mock_service_url,
     :namespace,
     :new_issue_url,
     :notify,
diff --git a/app/models/project_services/mock_ci_service.rb b/app/models/project_services/mock_ci_service.rb
new file mode 100644
index 00000000000..a8d581a1f67
--- /dev/null
+++ b/app/models/project_services/mock_ci_service.rb
@@ -0,0 +1,82 @@
+# For an example companion mocking service, see https://gitlab.com/gitlab-org/gitlab-mock-ci-service
+class MockCiService < CiService
+  ALLOWED_STATES = %w[failed canceled running pending success success_with_warnings skipped not_found].freeze
+
+  prop_accessor :mock_service_url
+  validates :mock_service_url, presence: true, url: true, if: :activated?
+
+  def title
+    'MockCI'
+  end
+
+  def description
+    'Mock an external CI'
+  end
+
+  def self.to_param
+    'mock_ci'
+  end
+
+  def fields
+    [
+      { type: 'text',
+        name: 'mock_service_url',
+        placeholder: 'http://localhost:4004' },
+    ]
+  end
+
+  # Return complete url to build page
+  #
+  # Ex.
+  #   http://jenkins.example.com:8888/job/test1/scm/bySHA1/12d65c
+  #
+  def build_page(sha, ref)
+    url = [mock_service_url,
+           "#{project.namespace.path}/#{project.path}/status/#{sha}"]
+
+    URI.join(*url).to_s
+  end
+
+  # Return string with build status or :error symbol
+  #
+  # Allowed states: 'success', 'failed', 'running', 'pending', 'skipped'
+  #
+  #
+  # Ex.
+  #   @service.commit_status('13be4ac', 'master')
+  #   # => 'success'
+  #
+  #   @service.commit_status('2abe4ac', 'dev')
+  #   # => 'running'
+  #
+  #
+  def commit_status(sha, ref)
+    response = HTTParty.get(commit_status_path(sha), verify: false)
+    read_commit_status(response)
+  rescue Errno::ECONNREFUSED
+    :error
+  end
+
+  def commit_status_path(sha)
+    url = [mock_service_url,
+           "#{project.namespace.path}/#{project.path}/status/#{sha}.json"]
+
+    URI.join(*url).to_s
+  end
+
+  def read_commit_status(response)
+    return :error unless response.code == 200 || response.code == 404
+
+    status = if response.code == 404
+               'pending'
+             else
+               response['status']
+             end
+
+    if status.present? && ALLOWED_STATES.include?(status)
+      status
+    else
+      :error
+    end
+  end
+end
diff --git a/app/models/service.rb b/app/models/service.rb
index facaaf9b331..3ef4cbead10 100644
--- a/app/models/service.rb
+++ b/app/models/service.rb
@@ -210,7 +210,7 @@ class Service < ActiveRecord::Base
   end
 
   def self.available_services_names
-    %w[
+    service_names = %w[
       asana
       assembla
       bamboo
@@ -238,6 +238,9 @@ class Service < ActiveRecord::Base
       slack
       teamcity
     ]
+    service_names << 'mock_ci' if Rails.env.development?
+
+    service_names.sort_by(&:downcase)
   end
 
   def self.build_from_template(project_id, template)
diff --git a/changelogs/unreleased/mock-ci-service.yml b/changelogs/unreleased/mock-ci-service.yml
new file mode 100644
index 00000000000..24c6366177f
--- /dev/null
+++ b/changelogs/unreleased/mock-ci-service.yml
@@ -0,0 +1,4 @@
+---
+title: Add Mock CI service/integration for development
+merge_request:
+author:
diff --git a/doc/api/services.md b/doc/api/services.md
index fba5da6587d..b030a425a7a 100644
--- a/doc/api/services.md
+++ b/doc/api/services.md
@@ -810,3 +810,38 @@ GET /projects/:id/services/teamcity
 
 [jira-doc]: ../user/project/integrations/jira.md
 [old-jira-api]: https://gitlab.com/gitlab-org/gitlab-ce/blob/8-13-stable/doc/api/services.md#jira
+
+
+## MockCI
+
+Mock an external CI. See [`gitlab-org/gitlab-mock-ci-service`](https://gitlab.com/gitlab-org/gitlab-mock-ci-service) for an example of a companion mock service.
+
+This service is only available when your environment is set to development.
+
+### Create/Edit MockCI service
+
+Set MockCI service for a project.
+
+```
+PUT /projects/:id/services/mock-ci
+```
+
+Parameters:
+
+- `mock_service_url` (**required**) - http://localhost:4004
+
+### Delete MockCI service
+
+Delete MockCI service for a project.
+
+```
+DELETE /projects/:id/services/mock-ci
+```
+
+### Get MockCI service settings
+
+Get MockCI service settings for a project.
+
+```
+GET /projects/:id/services/mock-ci
+```
diff --git a/doc/development/ci_setup.md b/doc/development/ci_setup.md
index 2f49b3564ab..b03216fec95 100644
--- a/doc/development/ci_setup.md
+++ b/doc/development/ci_setup.md
@@ -2,11 +2,12 @@
 
 This document describes what services we use for testing GitLab and GitLab CI.
 
-We currently use three CI services to test GitLab:
+We currently use four CI services to test GitLab:
 
 1. GitLab CI on [GitHost.io](https://gitlab-ce.githost.io/projects/4/) for the [GitLab.com repo](https://gitlab.com/gitlab-org/gitlab-ce)
 2. GitLab CI at ci.gitlab.org to test the private GitLab B.V. repo at dev.gitlab.org
 3. [Semephore](https://semaphoreapp.com/gitlabhq/gitlabhq/) for [GitHub.com repo](https://github.com/gitlabhq/gitlabhq)
+4. [Mock CI Service](user/project/integrations/mock_ci.md) for local development
 
 | Software @ configuration being tested | GitLab CI (ci.gitlab.org) | GitLab CI (GitHost.io) | Semaphore |
 |---------------------------------------|---------------------------|---------------------------------------------------------------------------|-----------|
diff --git a/doc/user/project/integrations/mock_ci.md b/doc/user/project/integrations/mock_ci.md
new file mode 100644
index 00000000000..6aefe5dbded
--- /dev/null
+++ b/doc/user/project/integrations/mock_ci.md
@@ -0,0 +1,13 @@
+# Mock CI Service
+
+**NB: This service is only listed if you are in a development environment!**
+
+To setup the mock CI service server, respond to the following endpoints
+
+- `commit_status`: `#{project.namespace.path}/#{project.path}/status/#{sha}.json`
+   - Have your service return `200 { status: ['failed'|'canceled'|'running'|'pending'|'success'|'success_with_warnings'|'skipped'|'not_found'] }`
+   - If the service returns a 404, it is interpreted as `pending`
+- `build_page`: `#{project.namespace.path}/#{project.path}/status/#{sha}`
+   - Just where the build is linked to, doesn't matter if implemented
+
+For an example of a mock CI server, see [`gitlab-org/gitlab-mock-ci-service`](https://gitlab.com/gitlab-org/gitlab-mock-ci-service)
diff --git a/lib/api/services.rb b/lib/api/services.rb
index 1456fe4688b..ad856115485 100644
--- a/lib/api/services.rb
+++ b/lib/api/services.rb
@@ -563,7 +563,20 @@ module API
       SlackService,
       MattermostService,
       TeamcityService,
-    ].freeze
+    ]
+
+    if Rails.env.development?
+      services['mock-ci'] = [
+        {
+          required: true,
+          name: :mock_service_url,
+          type: String,
+          desc: 'URL to the mock service'
+        }
+      ]
+
+      service_classes << MockCiService
+    end
 
     trigger_services = {
       'mattermost-slash-commands' => [