microsoft / microsoft/edit

enhancement: add missing common file extensions to language detection

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Dominant language
Rust
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Forks
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Avg merge
8h 40m
Merged PRs (30d)
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Description

Some common file extensions are currently missing from the language definitions.

The following extensions could be added:

* C++ -> `.hh`, `.hxx`, `.ixx`
* F# -> `.fsscript`
* JSON -> `.jsonl`, `.ndjson`
* Markdown -> `.markdown`
* XML -> `.xhtml`

There is also a duplicate `.xml` entry in the XML language definition that can be removed.

These changes would allow `edit` to recognize more commonly used file types without changing the existing syntax highlighting behavior.

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by locating the language definitions used by edit's file-type detection, then find the XML definition and its duplicate .xml entry. Add the listed extensions without changing syntax highlighting behavior, remove the duplicate, and verify that edit recognizes each extension.

Written by the indexing model from the issue text.

Assessment

Tech stack
cpp, fsharp, json, markdown, rust, xml
Domain
cli, tooling
Issue type
Feature
Difficulty
2/5
Estimated time
1-3 hours
Activity status
Active
Clarity
Mostly clear
Newbie friendliness
78/100

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