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nixpkgs/pkgs/applications/editors/vscode/extensions/README.md
Jeremy Fleischman 2b115ef0cc doc: update references to nixfmt-rfc-style to treefmt
This completes https://github.com/NixOS/nixpkgs/issues/425583.

Rather than putting `nixfmt` everywhere, I opted to teach people to use
`treefmt` instead. This is more correct, as we have formatting rules for
non-nix files, and also may invoke `nixfmt` with non-default options.
2026-02-07 13:59:27 -08:00

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# Visual Studio Code Extensions
## Conventions for adding new extensions
* Extensions are named in the **lowercase** version of the extension's unique identifier which is found on the extension's marketplace page, and is the name under which the extension is installed by VSCode under `~/.vscode`.
Extension location should be: ${lib.strings.toLower mktplcRef.publisher}.${lib.string.toLower mktplcRef.name}
* When adding a new extension, place its definition in a `default.nix` file in a directory with the extension's ID (e.g. `publisher.extension-name/default.nix`) and refer to it in `./default.nix`, e.g. `publisher.extension-name = callPackage ./publisher.extension-name { };`.
* Use `nix-shell --run treefmt` to format the VSCode extensions.
* Respect `alphabetical order` whenever adding extensions. If out of order, please kindly open a PR re-establishing the order.
* Avoid [unnecessary](https://nix.dev/guides/best-practices.html#with-scopes) use of `with`, particularly `nested with`.
* Use `hash` instead of `sha256`.
* On `meta` field:
- add a `changelog`.
- `description` should mention it is a Visual Studio Code extension.
- `downloadPage` is the VSCode marketplace URL.
- `homepage` is the source-code URL.
- `maintainers`:
- optionally consider adding yourself as a maintainer to be notified of updates, breakages and help with upkeep.
- recommended format is:
- a `non-nested with`, such as: `with lib.maintainers; [ your-username ];`.
- maintainers are listed in alphabetical order.
- verify `license` in upstream.
* Commit messages:
- Naming convention for:
- Adding a new extension:
> vscode-extensions.publisher.extension-name: init at 1.2.3
>
> Release: https://github.com/owner/project/releases/tag/1.2.3
- Updating an extension:
> vscode-extensions.publisher.extension-name: 1.2.3 -> 2.3.4
>
> Release: https://github.com/owner/project/releases/tag/2.3.4
- Multiple extensions can be added in a single PR, but each extension requires its own commit.