Скачать или смотреть How to Fix Build & Deploy Failures in GitLab with Nunjucks

Troubleshooting GitLab CI/CD build and deployment issues with Nunjucks. Get solutions to syncing problems and learn to implement checksums for successful deployments.
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This video is based on the question https://stackoverflow.com/q/68618380/ asked by the user 'CatarinaRuna' ( https://stackoverflow.com/u/14932840/ ) and on the answer https://stackoverflow.com/a/68646156/ provided by the user 'Reem Al-Assaf' ( https://stackoverflow.com/u/13380654/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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How to Fix Build & Deploy Failures in GitLab with Nunjucks

When you rely on automated tools to build and deploy your website, encountering a sudden failure can be incredibly frustrating. If you've been experiencing issues where updates to your website don’t seem to take effect, even after running build commands and checking logs, you're not alone! Many developers face this challenge, especially when working with tools like GitLab and Nunjucks. In this post, we will explore the potential reasons behind this issue and how you can resolve it effectively.

Understanding the Problem

The problem typically arises during the build and deployment phase of your project, where changes made to your website do not reflect in the live environment despite successful build logs. For those using a combination of tools like Nunjucks with GitLab CI/CD, it can be perplexing to discover that the expected updates aren’t visible after deployment.

Common Signs of the Problem:

Successful build logs (ending with "Job succeeded" message).

No visible changes after following the usual deployment process.

Files in the dist folder (like index.css) are found to be empty or incorrect, though they should contain updated content.

Suggested Solution: Adding Checksum to Rsync

A major reason for files not updating correctly during deployments can be attributed to how changes are detected and transferred between your local and remote environments. The solution to address this issue is to incorporate a checksum option during the rsync command in your .gitlab-ci.yml file.

Implementing the Change

To ensure rsync correctly identifies changes and updates the files on the server, modify your rsync command to include the --checksum option. Here’s how you can do it:

[[See Video to Reveal this Text or Code Snippet]]

Why Use Checksum?

Accurate Change Detection: The checksum operates by comparing the content of files rather than merely checking their sizes or modification dates. This reduces the likelihood that changes go unnoticed by rsync.

Avoids Unnecessary Deploy: Using checksums ensures that only changed files are transferred, improving efficiency during deployments.

Additional Troubleshooting Steps

While adding a checksum can significantly improve your deployment process, here are a few additional tips to help ensure everything runs smoothly:

Review Gulp Tasks: Ensure there are no unintentional errors in your gulpfile.js that might affect file generation.

Check Build Artifacts: Before deploying, inspect the contents of what's built in the dist folder to confirm it's up to date.

Examine Permissions: Sometimes, issues can stem from file permission settings that prevent successful updates on the server.

Conclusion

Deploying updates to your website should be a seamless process—when it’s not, it can lead to confusion and wasted effort. By leveraging a simple command change like adding a checksum to your rsync command, you can tackle the common build and deployment failures seen in setups using Nunjucks and GitLab CI/CD. Make sure to incorporate the best practices outlined above, and you’ll have a more reliable and effective deployment strategy moving forward.

Keep experimenting and refining your deployment process to ensure that your website reflects every update you make!