this post was submitted on 12 Apr 2024
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Programming
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You know what's a hard pill to swallow for Jenkins haters? It's likely older than your career, and is going to outlive you too. Like bash, and C, and gnu-utils.
Want to appear godlike in any org? Learn a tiny amount of groovy and read the pipelines pages - https://www.jenkins.io/doc/book/pipeline/
Jenkins is battle tested, Jenkins is likely already in your org, and replacing it for anything else is almost not worth the time from a strategic perspective. But it isn't perfect, testing it in particular - a pain in the ass
So here's the best tip: skinny Jenkinsfiles. When you use a sh: have it run a Makefile command, or your build tool command. Keep them short single line things. Don't rely on massive ENVs. Dockerfiles for most stuff. Dynamic container agents in the cloud are actually good. Learn to use archiveArtifact, integrate with test report plugins. Learn about parallel pipelines.
Yeah, this is something I stressed at my place. Your Jeninksfile should set up environment variables, authentication related stuff, and call out to some build tool to build the project. The Jenkinsfile should also be configure to use a docker container to run the build within. In projects at my place that's a Docker file on the project that ultimately sets up and installs all the tools and dependencies required for a valid build environment that's just checked in along side the Jenkinsfile.