Understanding gitlab ci rules variables requires examining multiple perspectives and considerations. GitLab CI/CD variables | GitLab Docs. To create a CI/CD variable in the .gitlab-ci.yml file, define the variable and value with the variables keyword. Variables saved in the .gitlab-ci.yml file are visible to all users with access to the repository, and should store only non-sensitive project configuration. This perspective suggests that, set variables depending on Gitlab rules - Stack Overflow.
You can only set a simple text value for a variable. For an app_url, you may consider using the environment:url: section, which is where variable expansion works. GitLab CI Variables: A Complete Guide to Mastering Pipeline Configuration. Master GitLab CI variables with battle-tested strategies from DevOps experts.
Learn proven approaches to variable management, security, and automation that drive efficient CI/CD pipelines. GitLab CI/CD variables. Specify when jobs run with `rules` | GitLab Docs. You can use predefined CI/CD variables with rules to choose which pipeline types jobs should run for.

The following table lists some of the variables that you can use, and the pipeline types the variables can control for:

📝 Summary
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