[gatsby-plugin-embed-snippet] Support for embedding specific line numbers

[danpoq]

Summary

DocFX has a feature in its inclusion of code snippets that allows you to specify a line number or line range to embed specific lines of an external file.

It works the same way as GitHub file URLs, where ending the URL with #L10 or #L10-L20 will link to those lines.

I propose that gatsby-remark-embed-snippet should also support this behaviour by trimming the embedded files using the agreed upon #Lx and #Lx-Ly syntax.

Basic example

Add logic to the embed-snippet plugin to add support for including a snippet by line number or line range. Basically:

If the embed: line contains #L, grab the hash and remove it from the path (it's not a valid file path). Then use the requested lines in the hash to split the embedded file and display only the requested line number(s).

Motivation

The use case for this feature is building tutorial pages which give the user only the parts of the code example that they require at the current step.

I am migrating from DocFX and am trying to get 100% feature parity to be able to convince my company to move to Gatsby.

[github-actions]

Hiya!

This issue has gone quiet. Spooky quiet. 👻

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[github-actions]

Hey again!

It’s been 30 days since anything happened on this issue, so our friendly neighborhood robot (that’s me!) is going to close it.
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As a friendly reminder: the best way to see this issue, or any other, fixed is to open a Pull Request. Check out gatsby.dev/contribute for more information about opening PRs, triaging issues, and contributing!

Thanks again for being part of the Gatsby community! 💪💜

[danpoq]

Closed by #21907