Pipeline editor

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The pipeline editor is the primary place to edit the GitLab CI/CD configuration in the .gitlab-ci.yml file in the root of your repository. To access the editor, go to Build > Pipeline editor.

From the pipeline editor page you can:

Select the branch to work from.
Validate your configuration syntax while editing the file.
Do a deeper lint of your configuration, that verifies it with any configuration added with the include keyword.
View a list of the CI/CD configuration added with the include keyword.
See a visualization of the current configuration.
View the full configuration, which displays the configuration with any configuration from include added.
Commit the changes to a specific branch.

Validate CI configuration

As you edit your pipeline configuration, it is continually validated against the GitLab CI/CD pipeline schema. It checks the syntax of your CI YAML configuration, and also runs some basic logical validations.

The result of this validation is shown at the top of the editor page. If your configuration is invalid, a tip is shown to help you fix the problem:

Lint CI configuration

NOTE: The Lint tab is replaced with the Validate tab in GitLab 15.3. The lint results are included in a successful pipeline simulation.

To test the validity of your GitLab CI/CD configuration before committing the changes, you can use the CI lint tool:

On the left sidebar, select Search or go to and find your project.
Select Build > Pipeline editor.
Select the Lint tab.

This tool checks for syntax and logical errors but goes into more detail than the automatic validation in the editor.

The results are updated in real-time. Any changes you make to the configuration are reflected in the CI lint. It displays the same results as the existing CI Lint tool.

Simulate a CI/CD pipeline

Introduced in GitLab 15.3.

To look for pipeline syntax and logic issues, you can simulate the creation of a GitLab CI/CD pipeline in the Validate tab. A pipeline simulation can help find problems such as incorrect rules and needs job dependencies, and is similar to simulations in the CI Lint tool.

View included CI/CD configuration

Introduced in GitLab 15.0 with a flag named pipeline_editor_file_tree. Disabled by default.

Feature flag removed in GitLab 15.1.

You can review configuration added with the include keyword in the pipeline editor. In the upper-right corner, select the file tree ({file-tree}) to see a list of all included configuration files. Selected files open in a new tab for review.

Visualize CI configuration

To view a visualization of your .gitlab-ci.yml configuration, in your project, go to Build > Pipeline editor, and then select the Visualize tab. The visualization shows all stages and jobs. Any needs relationships are displayed as lines connecting jobs together, showing the hierarchy of execution:

Hover over a job to highlight its needs relationships:

If the configuration does not have any needs relationships, then no lines are drawn because each job depends only on the previous stage being completed successfully.

View full configuration

View merged YAML tab renamed to Full configuration in GitLab 16.0.

To view the fully expanded CI/CD configuration as one combined file, go to the pipeline editor's Full configuration tab. This tab displays an expanded configuration where:

Configuration imported with include is copied into the view.
Jobs that use extends display with the extended configuration merged into the job.
YAML anchors are replaced with the linked configuration.
YAML !reference tags are also replaced with the linked configuration.

Using !reference tags can cause nested configuration that display with multiple hyphens (-) at the start of the line in the expanded view. This behavior is expected, and the extra hyphens do not affect the job's execution. For example, this configuration and fully expanded version are both valid:

.gitlab-ci.yml file:

.python-req:
  script:
    - pip install pyflakes

.rule-01:
  rules:
    - if: $CI_MERGE_REQUEST_SOURCE_BRANCH_NAME =~ /^feature/
      when: manual
      allow_failure: true
    - if: $CI_MERGE_REQUEST_SOURCE_BRANCH_NAME

.rule-02:
  rules:
    - if: $CI_COMMIT_BRANCH == "main"
      when: manual
      allow_failure: true

lint-python:
  image: python:latest
  script:
    - !reference [.python-req, script]
    - pyflakes python/
  rules:
    - !reference [.rule-01, rules]
    - !reference [.rule-02, rules]

Expanded configuration in Full configuration tab:

".python-req":
  script:
  - pip install pyflakes
".rule-01":
  rules:
  - if: "$CI_MERGE_REQUEST_SOURCE_BRANCH_NAME =~ /^feature/"
    when: manual
    allow_failure: true
  - if: "$CI_MERGE_REQUEST_SOURCE_BRANCH_NAME"
".rule-02":
  rules:
  - if: $CI_COMMIT_BRANCH == "main"
    when: manual
    allow_failure: true
lint-python:
  image: python:latest
  script:
  - - pip install pyflakes                                     # <- The extra hyphens do not affect the job's execution.
  - pyflakes python/
  rules:
  - - if: "$CI_MERGE_REQUEST_SOURCE_BRANCH_NAME =~ /^feature/" # <- The extra hyphens do not affect the job's execution.
      when: manual
      allow_failure: true
    - if: "$CI_MERGE_REQUEST_SOURCE_BRANCH_NAME"               # <- No extra hyphen but aligned with previous rule
  - - if: $CI_COMMIT_BRANCH == "main"                          # <- The extra hyphens do not affect the job's execution.
      when: manual
      allow_failure: true

Commit changes to CI configuration

The commit form appears at the bottom of each tab in the editor so you can commit your changes at any time.

When you are satisfied with your changes, add a descriptive commit message and enter a branch. The branch field defaults to your project's default branch.

If you enter a new branch name, the Start a new merge request with these changes checkbox appears. Select it to start a new merge request after you commit the changes.

Troubleshooting

`Configuration validation currently not available` message

This message is caused by a problem validating the syntax in the pipeline editor. It can happen when:

GitLab is unable to communicate with the service that validates the syntax, so the information in these sections may not display properly:
- The syntax status on the Edit tab (valid or invalid).
- The Visualize tab.
- The Lint tab.
- The Full configuration tab.
You can still work on your CI/CD configuration and commit the changes you made without any issues. As soon as the service becomes available again, the syntax validation should display immediately.
Using include, but the included configuration files create a loop. For example, .gitlab-ci.yml includes file1.yml, which includes file2.yml, which includes file1.yml, creating a loop between file1.yml and file2.yml.

Remove one of the include lines to eliminate the loop and resolve the issue.