Kirill Bulatov b5e07a42c3 Use proper rules for merging language server settings (#61546)
Closes https://github.com/zed-industries/zed/issues/61524

https://github.com/zed-industries/zed/issues/60763 was a bogus issue:
the semantic of root `language_settings` is the **default settings for
all languages**, not a "magic string that gets applied when an `!x`
exclusion is mentioned there".

Thus, reverts https://github.com/zed-industries/zed/pull/60984 and
redoes https://github.com/zed-industries/zed/pull/60000 in a correct
way: more custom settings replace less custom ones, same applies to the
language server settings.
Instead of doing some odd `!x` manipulations, the right fix is to remove
the old state as

```diff
 impl merge_from::MergeFrom for AllLanguageSettingsContent {
     fn merge_from(&mut self, other: &Self) {
         ...
         self.defaults.merge_from(&other.defaults);
         for language_settings in self.languages.0.values_mut() {
+            let language_servers = language_settings.language_servers.take();
             language_settings.merge_from(&other.defaults);
+            language_settings.language_servers = language_servers;
         }

         for (language_name, user_language_settings) in &other.languages.0 {
             if let Some(existing) = self.languages.0.get_mut(language_name) {
                 existing.merge_from(&user_language_settings);
             } else {
                 let mut new_settings = self.defaults.clone();
+                new_settings.language_servers = None;
                 new_settings.merge_from(&user_language_settings);
```

After the final override is determined, `...` is expanded and `!x`
entries are removed from the final list.

Project settings override user settings, so it's possible that a certain
language server is disabled by the user and re-enabled in the project:
worktree trust mechanism is supposed to mitigate the security issues.

More tests were added to cover all the cases.

Release Notes:

- Fixed project settings not re-enabling language servers
2026-07-24 08:32:03 +00:00
2026-01-22 23:57:26 +05:30
WIP
2023-12-14 09:25:14 -07:00
2026-04-29 10:27:47 +00:00
2025-02-04 09:02:59 -05:00
2025-10-27 13:27:59 -04:00
2026-06-27 15:06:29 +00:00
2025-10-17 18:58:14 +00:00
2026-03-17 16:34:35 +00:00
2026-04-29 10:27:47 +00:00

Zed

Zed CI

Welcome to Zed, a high-performance, multiplayer code editor from the creators of Atom and Tree-sitter.


Installation

On macOS, Linux, and Windows you can download Zed directly or install Zed via your local package manager (macOS/Linux/Windows).

Other platforms are not yet available:

Developing Zed

Contributing

See CONTRIBUTING.md for ways you can contribute to Zed.

Also... we're hiring! Check out our jobs page for open roles.

Licensing

Zed source code is licensed primarily under GPL-3.0-or-later, with Apache-2.0 components where marked.

License information for third party dependencies must be correctly provided for CI to pass.

We use cargo-about to automatically comply with open source licenses. If CI is failing, check the following:

  • Is it showing a no license specified error for a crate you've created? If so, add publish = false under [package] in your crate's Cargo.toml.
  • Is the error failed to satisfy license requirements for a dependency? If so, first determine what license the project has and whether this system is sufficient to comply with this license's requirements. If you're unsure, ask a lawyer. Once you've verified that this system is acceptable add the license's SPDX identifier to the accepted array in script/licenses/zed-licenses.toml.
  • Is cargo-about unable to find the license for a dependency? If so, add a clarification field at the end of script/licenses/zed-licenses.toml, as specified in the cargo-about book.

Sponsorship

Zed is developed by Zed Industries, Inc., a for-profit company.

If you’d like to financially support the project, you can do so via GitHub Sponsors. Sponsorships go directly to Zed Industries and are used as general company revenue. There are no perks or entitlements associated with sponsorship.

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