Did you know that you could validate your CircleCI config before pushing up your changes? Neither did I. I used to write my config, wait for CI to fail and then make the appropriate changes.
I got tired of doing that this morning, so decided to google “CircleCI config validator”. Guess what? I found one! Built by CircleCI themselves!
You can read their docs on it here.
But, here’s a quick TL;DR.
brew install --ignore-dependencies circleci
In my case, I didn’t need the package to install the “Docker for Mac” app since I already had it installed. For your specific needs, check out their installation section.
Once you have it installed, all you need to do is run:
circleci config validate
Let’s say I did run the validator and had a syntax error, what would that look like?
➜ circleci config validate Error: Unable to parse YAML while scanning a simple key in 'string', line 36, column 7: run ^ could not find expected ':' in 'string', line 38, column 7: - run: ^
Whoa! This is awesome! No more useless commits.
What else can we do?
There is a bunch of other things we can do with this command, such as:
How can we automate this?
As a consultant, I work across multiple projects and always look to automate and improve the developer experience. Knowing the above, I plan to create a utility for CircleCI projects to auto check the ci config as part of pre-commit git hook using lint-staged and husky.
So, what have we learned here?
- A config validator exists
- DevOps time can be cut by validating locally
- There are several other useful commands available to you
- This can be automated so we don’t have to think about it
I hope this was helpful to you.
Let me know what you think in the comments below.
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