Merge branch 'docs-juangascon/gitlab-ce-doc/ci/sort-predefined-variables' into 'master'

Sort list of predefined variables in alphabetical order

See merge request gitlab-org/gitlab-ce!23834

doc/ci/variables/README.md

@@ -44,19 +44,19 @@ future GitLab releases.**
 |-------------------------------------------|--------|--------|-------------|
 | **ARTIFACT_DOWNLOAD_ATTEMPTS**            | 8.15   | 1.9    | Number of attempts to download artifacts running a job |
 | **CI**                                    | all    | 0.4    | Mark that job is executed in CI environment |
+| **CI_COMMIT_BEFORE_SHA**                  | 11.2   | all    | The previous latest commit present on a branch before a push request. |
+| **CI_COMMIT_DESCRIPTION**                 | 10.8   | all    | The description of the commit: the message without first line, if the title is shorter than 100 characters; full message in other case. |
+| **CI_COMMIT_MESSAGE**                     | 10.8   | all    | The full commit message. |
 | **CI_COMMIT_REF_NAME**                    | 9.0    | all    | The branch or tag name for which project is built |
 | **CI_COMMIT_REF_SLUG**                    | 9.0    | all    | `$CI_COMMIT_REF_NAME` lowercased, shortened to 63 bytes, and with everything except `0-9` and `a-z` replaced with `-`. No leading / trailing `-`. Use in URLs, host names and domain names. |
 | **CI_COMMIT_SHA**                         | 9.0    | all    | The commit revision for which project is built |
 | **CI_COMMIT_SHORT_SHA**                   | 11.7   | all    | The first eight characters of `CI_COMMIT_SHA` |
-| **CI_COMMIT_BEFORE_SHA**                  | 11.2   | all    | The previous latest commit present on a branch before a push request. |
 | **CI_COMMIT_TAG**                         | 9.0    | 0.5    | The commit tag name. Present only when building tags. |
-| **CI_COMMIT_MESSAGE**                     | 10.8   | all    | The full commit message. |
 | **CI_COMMIT_TITLE**                       | 10.8   | all    | The title of the commit - the full first line of the message |
-| **CI_COMMIT_DESCRIPTION**                 | 10.8   | all    | The description of the commit: the message without first line, if the title is shorter than 100 characters; full message in other case. |
 | **CI_CONFIG_PATH**                        | 9.4    | 0.5    | The path to CI config file. Defaults to `.gitlab-ci.yml` |
 | **CI_DEBUG_TRACE**                        | all    | 1.7    | Whether [debug tracing](#debug-tracing) is enabled |
-| **CI_DEPLOY_USER**                        | 10.8   | all    | Authentication username of the [GitLab Deploy Token][gitlab-deploy-token], only present if the Project has one related.|
 | **CI_DEPLOY_PASSWORD**                    | 10.8   | all    | Authentication password of the [GitLab Deploy Token][gitlab-deploy-token], only present if the Project has one related.|
+| **CI_DEPLOY_USER**                        | 10.8   | all    | Authentication username of the [GitLab Deploy Token][gitlab-deploy-token], only present if the Project has one related.|
 | **CI_DISPOSABLE_ENVIRONMENT**             | all    | 10.1   | Marks that the job is executed in a disposable environment (something that is created only for this job and disposed of/destroyed after the execution - all executors except `shell` and `ssh`). If the environment is disposable, it is set to true, otherwise it is not defined at all. |
 | **CI_ENVIRONMENT_NAME**                   | 8.15   | all    | The name of the environment for this job |
 | **CI_ENVIRONMENT_SLUG**                   | 8.15   | all    | A simplified version of the environment name, suitable for inclusion in DNS, URLs, Kubernetes labels, etc. |
@@ -66,44 +66,44 @@ future GitLab releases.**
 | **CI_JOB_NAME**                           | 9.0    | 0.5    | The name of the job as defined in `.gitlab-ci.yml` |
 | **CI_JOB_STAGE**                          | 9.0    | 0.5    | The name of the stage as defined in `.gitlab-ci.yml` |
 | **CI_JOB_TOKEN**                          | 9.0    | 1.2    | Token used for authenticating with the [GitLab Container Registry][registry] and downloading [dependent repositories][dependent-repositories] |
+| **CI_JOB_URL**                            | 11.1   | 0.5    | Job details URL |
 | **CI_MERGE_REQUEST_ID**                   | 11.6   | all    | The ID of the merge request if it's [pipelines for merge requests](../merge_request_pipelines/index.md) |
 | **CI_MERGE_REQUEST_IID**                  | 11.6   | all    | The IID of the merge request if it's [pipelines for merge requests](../merge_request_pipelines/index.md) |
-| **CI_MERGE_REQUEST_REF_PATH**             | 11.6   | all    | The ref path of the merge request if it's [pipelines for merge requests](../merge_request_pipelines/index.md). (e.g. `refs/merge-requests/1/head`) |
 | **CI_MERGE_REQUEST_PROJECT_ID**           | 11.6   | all    | The ID of the project of the merge request if it's [pipelines for merge requests](../merge_request_pipelines/index.md) |
 | **CI_MERGE_REQUEST_PROJECT_PATH**         | 11.6   | all    | The path of the project of the merge request if it's [pipelines for merge requests](../merge_request_pipelines/index.md) (e.g. `namespace/awesome-project`) |
 | **CI_MERGE_REQUEST_PROJECT_URL**          | 11.6   | all    | The URL of the project of the merge request if it's [pipelines for merge requests](../merge_request_pipelines/index.md) (e.g. `http://192.168.10.15:3000/namespace/awesome-project`) |
-| **CI_MERGE_REQUEST_TARGET_BRANCH_NAME**   | 11.6   | all    | The target branch name of the merge request if it's [pipelines for merge requests](../merge_request_pipelines/index.md) |
+| **CI_MERGE_REQUEST_REF_PATH**             | 11.6   | all    | The ref path of the merge request if it's [pipelines for merge requests](../merge_request_pipelines/index.md). (e.g. `refs/merge-requests/1/head`) |
+| **CI_MERGE_REQUEST_SOURCE_BRANCH_NAME**   | 11.6   | all    | The source branch name of the merge request if it's [pipelines for merge requests](../merge_request_pipelines/index.md) |
 | **CI_MERGE_REQUEST_SOURCE_PROJECT_ID**    | 11.6   | all    | The ID of the source project of the merge request if it's [pipelines for merge requests](../merge_request_pipelines/index.md) |
 | **CI_MERGE_REQUEST_SOURCE_PROJECT_PATH**  | 11.6   | all    | The path of the source project of the merge request if it's [pipelines for merge requests](../merge_request_pipelines/index.md) |
 | **CI_MERGE_REQUEST_SOURCE_PROJECT_URL**   | 11.6   | all    | The URL of the source project of the merge request if it's [pipelines for merge requests](../merge_request_pipelines/index.md) |
-| **CI_MERGE_REQUEST_SOURCE_BRANCH_NAME**   | 11.6   | all    | The source branch name of the merge request if it's [pipelines for merge requests](../merge_request_pipelines/index.md) |
+| **CI_MERGE_REQUEST_TARGET_BRANCH_NAME**   | 11.6   | all    | The target branch name of the merge request if it's [pipelines for merge requests](../merge_request_pipelines/index.md) |
 | **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_JOB_URL**                            | 11.1   | 0.5    | Job details URL |
-| **CI_REPOSITORY_URL**                     | 9.0    | all    | The URL to clone the Git repository |
-| **CI_RUNNER_DESCRIPTION**                 | 8.10   | 0.5    | The description of the runner as saved in GitLab |
-| **CI_RUNNER_ID**                          | 8.10   | 0.5    | The unique id of runner being used |
-| **CI_RUNNER_TAGS**                        | 8.10   | 0.5    | The defined runner tags |
-| **CI_RUNNER_VERSION**                     | all    | 10.6   | GitLab Runner version that is executing the current job |
-| **CI_RUNNER_REVISION**                    | all    | 10.6   | GitLab Runner revision that is executing the current job |
-| **CI_RUNNER_EXECUTABLE_ARCH**             | all    | 10.6   | The OS/architecture of the GitLab Runner executable (note that this is not necessarily the same as the environment of the executor) |
 | **CI_PIPELINE_ID**                        | 8.10   | 0.5    | 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_TRIGGERED**                 | all    | all    | The flag to indicate that job was [triggered] |
 | **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` |
+| **CI_PIPELINE_TRIGGERED**                 | all    | all    | The flag to indicate that job was [triggered] |
+| **CI_PIPELINE_URL**                       | 11.1   | 0.5    | Pipeline details URL |
 | **CI_PROJECT_DIR**                        | all    | all    | The full path where the repository is cloned and where the job is run |
 | **CI_PROJECT_ID**                         | all    | all    | The unique id of the current project that GitLab CI uses internally |
 | **CI_PROJECT_NAME**                       | 8.10   | 0.5    | The project name that is currently being built (actually it is project folder name) |
 | **CI_PROJECT_NAMESPACE**                  | 8.10   | 0.5    | The project namespace (username or groupname) that is currently being built |
 | **CI_PROJECT_PATH**                       | 8.10   | 0.5    | The namespace with project name |
 | **CI_PROJECT_PATH_SLUG**                  | 9.3    | all    | `$CI_PROJECT_PATH` lowercased and with everything except `0-9` and `a-z` replaced with `-`. Use in URLs and domain names. |
-| **CI_PIPELINE_URL**                       | 11.1   | 0.5    | Pipeline details URL |
 | **CI_PROJECT_URL**                        | 8.10   | 0.5    | The HTTP address to access project |
 | **CI_PROJECT_VISIBILITY**                 | 10.3   | all    | The project visibility (internal, private, public) |
 | **CI_REGISTRY**                           | 8.10   | 0.5    | If the Container Registry is enabled it returns the address of GitLab's Container Registry |
 | **CI_REGISTRY_IMAGE**                     | 8.10   | 0.5    | If the Container Registry is enabled for the project it returns the address of the registry tied to the specific project |
 | **CI_REGISTRY_PASSWORD**                  | 9.0    | all    | The password to use to push containers to the GitLab Container Registry |
 | **CI_REGISTRY_USER**                      | 9.0    | all    | The username to use to push containers to the GitLab Container Registry |
+| **CI_REPOSITORY_URL**                     | 9.0    | all    | The URL to clone the Git repository |
+| **CI_RUNNER_DESCRIPTION**                 | 8.10   | 0.5    | The description of the runner as saved in GitLab |
+| **CI_RUNNER_EXECUTABLE_ARCH**             | all    | 10.6   | The OS/architecture of the GitLab Runner executable (note that this is not necessarily the same as the environment of the executor) |
+| **CI_RUNNER_ID**                          | 8.10   | 0.5    | The unique id of runner being used |
+| **CI_RUNNER_REVISION**                    | all    | 10.6   | GitLab Runner revision that is executing the current job |
+| **CI_RUNNER_TAGS**                        | 8.10   | 0.5    | The defined runner tags |
+| **CI_RUNNER_VERSION**                     | all    | 10.6   | GitLab Runner version that is executing the current job |
 | **CI_SERVER**                             | all    | all    | Mark that job is executed in CI environment |
 | **CI_SERVER_NAME**                        | all    | all    | The name of CI server that is used to coordinate jobs |
 | **CI_SERVER_REVISION**                    | all    | all    | GitLab revision that is used to schedule jobs |