Tool to validate front matter YAML in markdown files

[lamyergeier]

Is there any tool to validate front matter YAML in markdown files?

Note

• yamllint doesn't support it (refer: [Support YAML front-matter in markdown files · Issue #161 · adrienverge/yamllint](Support YAML front-matter in markdown files adrienverge/yamllint#161))
• yq ([mikefarah/yq: yq is a portable command-line YAML, JSON, XML, CSV, TOML and properties processor](https://github.com/mikefarah/yq)) can extract YAML front matter only if it is a valid YAML.

[jgm]

What are you trying to do? If you want to extract YAML metadata, you can do that with pandoc itself. Create a template meta.tpl, containing

$meta-json$

then pandoc --template meta-json -t markdown your-document.md.

If you want to raise an error if the YAML is malformed, pandoc's parser will do this itself.