Add a Build Variable to represent the triggering GitLab user's login username

* Predefined variable represents the username of the GitLab user that started a build

app/models/ci/build.rb

@@ -385,6 +385,7 @@ module Ci
       [
         { key: 'GITLAB_USER_ID', value: user.id.to_s, public: true },
         { key: 'GITLAB_USER_EMAIL', value: user.email, public: true },
+        { key: 'GITLAB_USER_LOGIN', value: user.username, public: true },
         { key: 'GITLAB_USER_NAME', value: user.name, public: true }
       ]
     end

changelogs/unreleased/26692-predefined-variable-gitlab-user-name.yml

+---
+title: Add CI/CD job predefined variables with user name and login
+merge_request: 13824
+author:
+type: added

doc/ci/variables/README.md

@@ -77,12 +77,8 @@ future GitLab releases.**
 | **GITLAB_CI**                   | all    | all    | Mark that job is executed in GitLab CI environment |
 | **GITLAB_USER_ID**              | 8.12   | all    | The id of the user who started the job |
 | **GITLAB_USER_EMAIL**           | 8.12   | all    | The email of the user who started the job |
-<<<<<<< HEAD
-| **GITLAB_USER_NAME**            | 10.0   | all    | The name of the user who started the job |
-=======
-| **GITLAB_USER_USERNAME**        | 10.0   | all    | The username of the user who started the job |
+| **GITLAB_USER_LOGIN**           | 10.0   | all    | The login username of the user who started the job |
 | **GITLAB_USER_NAME**            | 10.0   | all    | The real name of the user who started the job |
->>>>>>> 940c584882... fixup name
 | **RESTORE_CACHE_ATTEMPTS**      | 8.15   | 1.9    | Number of attempts to restore the cache running a job |
 
 ## 9.0 Renaming

spec/models/ci/build_spec.rb

@@ -1250,6 +1250,7 @@ describe Ci::Build do
         [
           { key: 'GITLAB_USER_ID', value: user.id.to_s, public: true },
           { key: 'GITLAB_USER_EMAIL', value: user.email, public: true },
+          { key: 'GITLAB_USER_LOGIN', value: user.username, public: true },
           { key: 'GITLAB_USER_NAME', value: user.name, public: true }
         ]
       end