How to Execute a Job in GitLab CI only if Previous Jobs Succeed скачать в хорошем качестве

How to Execute a Job in GitLab CI only if Previous Jobs Succeed

Learn how to configure a GitLab CI pipeline to execute a job based on the success of its preceding jobs. In this post, we cover how to use the `needs` keyword in conjunction with rules to achieve this behavior. --- This video is based on the question https://stackoverflow.com/q/74475642/ asked by the user 'Sam Martin' ( https://stackoverflow.com/u/19696178/ ) and on the answer https://stackoverflow.com/a/74482874/ provided by the user 'Benjamin' ( https://stackoverflow.com/u/14406845/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions. Visit these links for original content and any more details, such as alternate solutions, latest updates/developments on topic, comments, revision history etc. For example, the original title of the Question was: GitLab CI: Execute a Job only if one of the two previous jobs succeeded Also, Content (except music) licensed under CC BY-SA https://meta.stackexchange.com/help/l... The original Question post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license, and the original Answer post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license. If anything seems off to you, please feel free to write me at vlogize [AT] gmail [DOT] com. --- How to Execute a Job in GitLab CI only if Previous Jobs Succeed When developing a CI/CD pipeline using GitLab, it's essential to manage job dependencies effectively. A common requirement is to execute a particular job conditionally based on the success of previous jobs. In this guide, we'll discuss the challenge of executing a job C only if either job A or job B is executed and how to implement this using GitLab CI features. The Problem You may find yourself in a situation where you have three jobs defined: A, B, and C. The goal is to have job C run only if at least one of the two preceding jobs, A or B, has executed successfully. The initial attempt using the needs keyword might lead to confusion and errors, particularly if the dependent jobs don't execute in the expected order. Specifically, if you've tried to set up job C with: [[See Video to Reveal this Text or Code Snippet]] You may encounter an error message like: [[See Video to Reveal this Text or Code Snippet]] This indicates that job C cannot proceed as it relies on jobs that may not have run. The Solution While directly specifying dependencies between jobs A and B and job C does not work, we can effectively leverage the needs: optional feature along with job rules. Here’s how you can structure your .gitlab-ci.yml to achieve the desired outcome. Step 1: Define Jobs A and B You will need to ensure that jobs A and B are defined with specific rules. For instance: [[See Video to Reveal this Text or Code Snippet]] Step 2: Define Job C with Optional Needs Now, let's define job C in a way that allows it to run if either job A or B succeeds: [[See Video to Reveal this Text or Code Snippet]] Explanation of Key Components needs: optional: This allows job C to depend on jobs A and B without failing if neither of them runs. This flexibility is crucial as it caters to varied branch conditions. artifacts: true: This line specifies that job C can access the artifacts generated by jobs A and B, enhancing its functionality when triggered. Rule Conditions: The rules section for job C checks the branch conditions to ensure that the job is only attempted in relevant scenarios. Important Notes Triggering Jobs: Be mindful that if the rules allow for job C to run without either of its dependencies having executed, it will not fail automatically since those jobs are optional. Therefore, you must ensure that your logic aligns with your CI/CD processes. By implementing this configuration, you ensure that job C only runs when either job A or job B has completed successfully, streamlining your CI pipeline and enhancing its reliability. Conclusion Setting up job dependencies in GitLab CI can initially seem daunting, especially when trying to create conditional execution flows. However, by using the needs: optional feature alongside job rules, you can effectively manage your CI/CD pipelines. This setup allows for more flexibility and control, ensuring a smoother development process. Now that you have the tools to conditionally execute jobs in GitLab CI, you can focus on building a more robust and efficient pipeline for your projects!