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Hey I am looking for a YAML validator to verify my .yaml files are correct. I am using GitLab CI. Since I have a massive configuration I split it to several yaml files and import them on my main yaml file (using gitlab's CI syntax for import .yml files)

For example in main.yml I have:

include:
    - ".imported_config1.yml"
    - ".imported_config2.yml"

There are many yaml validators online, but none seem to validate it with the imports and it takes time and effort to manually copy paste all the imports to a different file and validate it just for the validation process...

When I run GitLab CI it verifies the .yaml correctly, but I am looking for an external tool to perform only the validation process before the config file is in the server.

Is there any tool or fix for this?

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  • You may want to add more context to the question: this is a GitLab CI configuration and whether you have tried the pipeline editor or the VS Code extension marketplace.visualstudio.com/…
    – Kariem
    Jul 22, 2022 at 10:45

1 Answer 1

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From what I understand, there is no standard mechanism in YAML to import/include other files (see also this answer on SO and associated discussion). So, you will either need to follow a standard format that already provides this, such as OpenAPI's $ref, or use a validator that has a proper handler for this include node.

Looking through the linked discussion on SO, there seems to be a way to use inheritance via the Ruby Gem yaml_extend and PyYAML can support something like !include which seems to be what you are looking for.

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  • Hey thanks for the answer! The include infrastructure I use is Gitlab CI's. docs.gitlab.com/ee/ci/yaml I want to have an external validator that can handle that...
    – Or b
    Jul 21, 2022 at 14:04
  • @Orb I could not verify this, but the documentation says the pipeline editor should be capable of verifying this and also, there is a VS Code extension: marketplace.visualstudio.com/… - Does this work for you?
    – Kariem
    Jul 22, 2022 at 10:43
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    Thanks for the notes mate. I edited the question. GitLab CI does verify it although I am looking for an external tool to perform the check before the files are in the server (e.g. using pre-commit hook). I use VS2015 and not VScode although the extension you mentioned seem to have what I am looking for.. I saw that there is an extension for VS I will check it out. marketplace.visualstudio.com/…
    – Or b
    Jul 23, 2022 at 16:32

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