Bytlinux

 In GitLab CI/CD, you can define rules to determine when a job should run. If you want to fetch or clone a Git repository during your CI/CD pipeline, you typically do so in a "before_script" section that is shared by multiple jobs. However, you can use rules to control when these steps should be executed. Here's an example of how you might define such rules: ```yaml stages:   - build variables:   GIT_STRATEGY: clone # This ensures GitLab will always clone the repository before_script:   - echo "This is a shared script to be run before every job." job1:   stage: build   script:     - echo "Job 1"   rules:     - changes: # Run this job if there are changes in specified paths       - path/to/code/* job2:   stage: build   script:     - echo "Job 2"   rules:     - changes: # Run this job if there are changes in specified paths       - another/path/* job3:   stage: build   script:     - echo "Job 3"   rules:     - changes: [] # Run th

 When your GitLab pipeline has stopped working with an "invalid YAML" error, it means there's a problem with your `.gitlab-ci.yml` file. This could be due to syntax errors, incorrect indentation, or other issues in your pipeline configuration. Here's how to troubleshoot and resolve this issue: 1. **Check for Syntax Errors**:    Carefully review your `.gitlab-ci.yml` file for any syntax errors. Common issues include missing colons, indentation problems, or mismatched quotation marks. Use a YAML linter or an online YAML validator to identify and correct syntax errors. 2. **Indentation**:    YAML relies heavily on proper indentation. Make sure that all lines within the same block have consistent indentation (typically using spaces, not tabs). Incorrect indentation can cause YAML parsing errors. 3. **Dashes and Lists**:    Ensure that you use the correct syntax for lists (arrays) in YAML by starting each item with a dash (`-`). Be consistent with your use of dashes throug