This PR does two things to fix
https://github.com/zed-industries/zed/issues/4325:
1. It changes the way `code_actions_on_format` works to send the
possibly configured code actions to _all_ (and not just the primary)
languages servers. That means configured code actions can now be sent to
ESLint, tailwind, ... and other language servers.
2. It enables `codeActionsOnSave` by default for ESLint. That does
**not** mean that by default we will run something on save, but only
that we enable it for ESLint.
Users can then configure their Zed to run the `eslint` code action on
format. Example, for JavaScript:
```json
{
"languages": {
"JavaScript": {
"code_actions_on_format": {
"source.fixAll.eslint": true
}
},
}
}
```
Release Notes:
- Added ability to run ESLint fixes when formatting a buffer. Code
actions configured in
[`code_actions_on_format`](https://zed.dev/docs/configuring-zed#code-actions-on-format)
are now being sent to _all_ language servers connected to a buffer, not
just the primary one. So if a user now sets `"code_actions_on_format": {
"source.fixAll.eslint": true }` in their Zed settings, the
`source.fixAll.eslint` code action will be sent to ESLint, which is not
a primary language server. Since the formatter (prettier, or external
commands, or another language server, ...) still runs, it's important
that these code actions and the formatter don't clash.
([#4325](https://github.com/zed-industries/zed/issues/4325)).
Demo:
https://github.com/zed-industries/zed/assets/1185253/9ef03ad5-1f5c-4d46-b72a-eef611e32f39
f8959834c4