Add GitLab Pages predefined variables

app/models/project.rb

@@ -1689,11 +1689,19 @@ class Project < ActiveRecord::Base
       .append(key: 'CI_PROJECT_NAMESPACE', value: namespace.full_path)
       .append(key: 'CI_PROJECT_URL', value: web_url)
       .append(key: 'CI_PROJECT_VISIBILITY', value: visibility)
+      .concat(pages_variables)
       .concat(container_registry_variables)
       .concat(auto_devops_variables)
       .concat(api_variables)
   end
 
+  def pages_variables
+    Gitlab::Ci::Variables::Collection.new.tap do |variables|
+      variables.append(key: 'CI_PAGES_DOMAIN', value: Gitlab.config.pages.host)
+      variables.append(key: 'CI_PAGES_URL', value: pages_url)
+    end
+  end
+
   def api_variables
     Gitlab::Ci::Variables::Collection.new.tap do |variables|
       variables.append(key: 'CI_API_V4_URL', value: API::Helpers::Version.new('v4').root_url)

changelogs/unreleased/adrianmoisey-GITLAB_PAGES_PREDEFINED_VARIABLES.yml

+---
+title: Add GitLab Pages predefined CI variables 'CI_PAGES_DOMAIN' and 'CI_PAGES_URL'
+merge_request: 24504
+author: Adrian Moisey
+type: added

doc/ci/variables/README.md

@@ -85,6 +85,8 @@ future GitLab releases.**
 | **CI_NODE_INDEX**                         | 11.5   | all    | Index of the job in the job set. If the job is not parallelized, this variable is not set. |
 | **CI_NODE_TOTAL**                         | 11.5   | all    | Total number of instances of this job running in parallel. If the job is not parallelized, this variable is set to `1`. |
 | **CI_API_V4_URL**                         | 11.7   | all    | The GitLab API v4 root URL |
+| **CI_PAGES_DOMAIN**                       | 11.8   | all    | The configured domain that hosts GitLab Pages. |
+| **CI_PAGES_URL**                          | 11.8   | all    | URL to GitLab Pages-built pages. Always belongs to a subdomain of `CI_PAGES_DOMAIN`. |
 | **CI_PIPELINE_ID**                        | 8.10   | all    | The unique id of the current pipeline that GitLab CI uses internally |
 | **CI_PIPELINE_IID**                       | 11.0   | all    | The unique id of the current pipeline scoped to project |
 | **CI_PIPELINE_SOURCE**                    | 10.0   | all    | Indicates how the pipeline was triggered. Possible options are: `push`, `web`, `trigger`, `schedule`, `api`, and `pipeline`. For pipelines created before GitLab 9.5, this will show as `unknown` |
@@ -395,6 +397,10 @@ Running on runner-8a2f473d-project-1796893-concurrent-0 via runner-8a2f473d-mach
 ++ CI_SERVER_VERSION=8.14.3-ee
 ++ export CI_SERVER_REVISION=82823
 ++ CI_SERVER_REVISION=82823
+++ export CI_PAGES_DOMAIN=gitlab.io
+++ CI_PAGES_DOMAIN=gitlab.io
+++ export CI_PAGES_URL=https://gitlab-examples.gitlab.io/ci-debug-trace
+++ CI_PAGES_URL=https://gitlab-examples.gitlab.io/ci-debug-trace
 ++ export CI_PROJECT_ID=17893
 ++ CI_PROJECT_ID=17893
 ++ export CI_PROJECT_NAME=ci-debug-trace
@@ -498,6 +504,8 @@ export CI_JOB_TRIGGERED="true"
 export CI_JOB_TOKEN="abcde-1234ABCD5678ef"
 export CI_PIPELINE_ID="1000"
 export CI_PIPELINE_IID="10"
+export CI_PAGES_DOMAIN="gitlab.io"
+export CI_PAGES_URL="https://gitlab-org.gitlab.io/gitlab-ce"
 export CI_PROJECT_ID="34"
 export CI_PROJECT_DIR="/builds/gitlab-org/gitlab-ce"
 export CI_PROJECT_NAME="gitlab-ce"

spec/models/ci/build_spec.rb

@@ -2133,6 +2133,8 @@ describe Ci::Build do
           { key: 'CI_PROJECT_NAMESPACE', value: project.namespace.full_path, public: true },
           { key: 'CI_PROJECT_URL', value: project.web_url, public: true },
           { key: 'CI_PROJECT_VISIBILITY', value: 'private', public: true },
+          { key: 'CI_PAGES_DOMAIN', value: Gitlab.config.pages.host, public: true },
+          { key: 'CI_PAGES_URL', value: project.pages_url, public: true },
           { key: 'CI_API_V4_URL', value: 'http://localhost/api/v4', public: true },
           { key: 'CI_PIPELINE_IID', value: pipeline.iid.to_s, public: true },
           { key: 'CI_CONFIG_PATH', value: pipeline.ci_yaml_file_path, public: true },