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https://github.com/mantoni/eslint_d.js
Makes eslint the fastest linter on the planet
https://github.com/mantoni/eslint_d.js
emacs eslint flycheck sublime syntastic vim webstorm
Last synced: about 1 month ago
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Makes eslint the fastest linter on the planet
- Host: GitHub
- URL: https://github.com/mantoni/eslint_d.js
- Owner: mantoni
- License: mit
- Created: 2015-09-18T20:53:08.000Z (almost 9 years ago)
- Default Branch: master
- Last Pushed: 2024-05-17T08:43:04.000Z (4 months ago)
- Last Synced: 2024-05-27T12:32:27.824Z (3 months ago)
- Topics: emacs, eslint, flycheck, sublime, syntastic, vim, webstorm
- Language: JavaScript
- Homepage:
- Size: 1.02 MB
- Stars: 1,062
- Watchers: 6
- Forks: 65
- Open Issues: 25
-
Metadata Files:
- Readme: README.md
- Changelog: CHANGES.md
- License: LICENSE
Awesome Lists containing this project
README
eslint_d
🪄 Speed up eslint to accelerate your development workflow
> Runs [eslint][] in a background process to improve linting time while editing.
> On a MacBook Air M1 with node.js v22.2.0 and eslint v9.8.0:
```bash
❯ eslint file.js # ~500ms
❯ eslint_d file.js # ~115ms
```
## Features
- Supports all eslint versions from v4 to v9.
- Supports all LTS versions of node.js.
- Automatically starts, stops and restarts the background server.
- Binds to parent process, editor process or exits after IDLE time.
- Falls back to bundled eslint if local eslint is missing.
## Setup
```bash
❯ npm i -g eslint_d
```
### Vim
- With [ale][]:
```vim
let $ESLINT_D_PPID = getpid()
let g:ale_javascript_eslint_executable = 'eslint_d'
let g:ale_javascript_eslint_use_global = 1
```
- With [syntastic][]:
```vim
let $ESLINT_D_PPID = getpid()
let g:syntastic_javascript_checkers = ['eslint']
let g:syntastic_javascript_eslint_exec = 'eslint_d'
```
### WebStorm
Configure your IDE to point to the `eslint_d` package instead of `eslint`. In
the ESLint configuration dialog, under 'ESLint package', select your `eslint_d`
package.
### Emacs
Use [flycheck][] with the `javascript-eslint` checker:
```elisp
(setq flycheck-javascript-eslint-executable "eslint_d")
```
### Sublime
The official [SublimeLinter-eslint][] plugin automatically prefers `eslint_d`
if it finds one.
### Atom, VSCode
You will not gain any performance from this module as these editors already
cache eslint instances for you.
---
If you're using `eslint_d` in any other editor, please let us know!
## Commands
`eslint_d` is a drop-in replacement for `eslint`. It forwards all arguments to
`eslint` and starts the background server if necessary:
```
eslint_d [options] file.js [file.js] [dir]
```
All arguments are passed to eslint, except for the following commands:
```
start Start the daemon
stop Stop the daemon
restart Restart the daemon
status Show daemon status, process id and resolved eslint version
--help, -h Show this help
--version, -v Show version number of eslint_d and bundled eslint
```
## Environment variables
- `ESLINT_D_PPID` Parent process id to monitor. If the parent process dies, the
daemon exits as well. "0" disables monitoring (default), and "auto" monitors
the parent process that started eslint_d.
- `ESLINT_D_IDLE` Number of minutes of inactivity before the daemon exits.
Defaults to "0" if `ESLINT_D_PPID` is set, otherwise "15".
- `ESLINT_D_MISS` How to behave if local eslint is missing. "fallback" uses the
bundled eslint (default). "fail" logs an error and exits with code 1.
"ignore" silently exits with code 0.
## How does this work?
`eslint_d` starts a background server that runs `eslint` in a separate process.
It communicates with the server over a Unix domain socket. When you run
`eslint_d`, it forwards all arguments to the server and prints the result. This
is faster because node.js doesn't have to load all the required modules every
time.
By default, `eslint_d` uses the local `eslint` package if available. If the
local `eslint` package is missing, `eslint_d` falls back to the bundled
`eslint` package. You can change this behavior with the `ESLINT_D_MISS`
environment variable. To see which `eslint` package is used, run `eslint_d
status`.
A `.eslint_d` file is stored in the resolved eslint installation directory
which stores a security token, the server port and process id, and the hash of
the monitored files. If the file is removed, the server exits.
The server automatically stops after 15 minutes of inactivity. You can change
this with the `ESLINT_D_IDLE` environment variable. Alternatively, you can bind
the lifetime of the server to a parent process by setting `ESLINT_D_PPID` to
"auto" or a specific parent process id. The server will exit when the parent
process dies. Note that "auto" uses the parent process that started `eslint_d`,
which may not be the editor process.
The server is also automatically restarted if one of the following files
changed: `package.json`, `package-lock.json`, `npm-shrinkwrap.json`,
`yarn.lock`, `pnpm-lock.yaml`.
## Compatibility
- `14.0.0`: eslint 4 - 9, node 18 - 22 (ships with eslint 9)
- `13.0.0`: eslint 4 - 8, node 12 - 20 (ships with eslint 8)
- `12.0.0`: eslint 4 - 8, node 12 - 16 (ships with eslint 8)
- `11.0.0`: eslint 4 - 8, node 12 - 16 (ships with eslint 7)
- `10.0.0`: eslint 4 - 7, node 10 - 14 (using new `ESLint` API if available)
- `9.0.0`: eslint 4 - 7, node 10 - 14 (using `CLIEngine` API)
- `8.0.0`: eslint 4 - 6, node 8 - 12
- `7.2.0`: eslint 4 - 5, node 6 - 10
- `7.0.0`: eslint 5.4+, node 6, 8 and 10
- `6.0.0`: eslint 5.0+, node 6+ (eslint dropped node 4)
- `5.0.0`: eslint 4.0+
- `4.0.0`: eslint 3.0+, node 4+ (eslint dropped node 0.10 and 0.12)
- `3.0.0`: eslint 2.2+
- `1.0.0`, `2.0.0`: eslint 1.4+, node 4 (and probably older)
## License
MIT
[License]: https://img.shields.io/npm/l/eslint_d.svg
[eslint]: https://eslint.org
[ale]: https://github.com/dense-analysis/ale
[syntastic]: https://github.com/scrooloose/syntastic
[flycheck]: http://www.flycheck.org/
[SublimeLinter-eslint]: https://github.com/SublimeLinter/SublimeLinter-eslint