https://github.com/ehmicky/modern-errors-cli
`modern-errors` plugin to handle errors in CLI modules.
https://github.com/ehmicky/modern-errors-cli
bash browser cli console errors handler javascript library message modern-errors modern-errors-plugin monitoring nodejs plugins shell stack stacktrace terminal timeout typescript
Last synced: 3 months ago
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`modern-errors` plugin to handle errors in CLI modules.
- Host: GitHub
- URL: https://github.com/ehmicky/modern-errors-cli
- Owner: ehmicky
- License: mit
- Created: 2022-11-02T20:07:35.000Z (over 3 years ago)
- Default Branch: main
- Last Pushed: 2025-06-17T03:52:10.000Z (8 months ago)
- Last Synced: 2025-06-17T03:52:15.535Z (8 months ago)
- Topics: bash, browser, cli, console, errors, handler, javascript, library, message, modern-errors, modern-errors-plugin, monitoring, nodejs, plugins, shell, stack, stacktrace, terminal, timeout, typescript
- Language: TypeScript
- Homepage:
- Size: 8.71 MB
- Stars: 7
- Watchers: 2
- Forks: 1
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- Changelog: CHANGELOG.md
- Contributing: CONTRIBUTING.md
- License: LICENSE
- Code of conduct: CODE_OF_CONDUCT.md
Awesome Lists containing this project
README
[](https://www.npmjs.com/package/modern-errors-cli)
[](/src/main.ts)
[](https://codecov.io/gh/ehmicky/modern-errors-cli)
[](https://fosstodon.org/@ehmicky)
[](https://medium.com/@ehmicky)
[`modern-errors`](https://github.com/ehmicky/modern-errors)
[plugin](https://github.com/ehmicky/modern-errors#-plugins) to handle errors in
CLI modules.
This adds [`BaseError.exit(error)`](#baseerrorexiterror) which logs `error` then
exits the process.
# Features
- 🖍️ Pretty [colors](#%EF%B8%8F-colors), [icons](#-icon) and [header](#-header)
- 🚒 [Graceful exit](#-timeout)
- ⛑️ [Normalize](https://github.com/ehmicky/normalize-exception) invalid errors
- 🔕 Log verbosity: [message](#-silent), [stack](#-stack),
[nested errors](#-cause), [properties](#-props)
- 🚨 Custom [exit code](#-exitcode) and [log function](#-log)
- 💥 Exception-safe
# Screenshot
# Example
[Adding the plugin](https://github.com/ehmicky/modern-errors#adding-plugins) to
[`modern-errors`](https://github.com/ehmicky/modern-errors).
```js
import ModernError from 'modern-errors'
import modernErrorsCli from 'modern-errors-cli'
export const BaseError = ModernError.subclass('BaseError', {
plugins: [modernErrorsCli],
})
// ...
```
Calling [`BaseError.exit(error)`](#baseerrorexiterror) in the CLI's top-level
error handler.
```js
const cliMain = () => {
try {
// ...
} catch (error) {
// Logs `error` then exits the process
BaseError.exit(error)
}
}
cliMain()
```
# Install
```bash
npm install modern-errors-cli
```
This package requires Node.js >=18.18.0.
This is an ES module. It must be loaded using
[an `import` or `import()` statement](https://gist.github.com/sindresorhus/a39789f98801d908bbc7ff3ecc99d99c),
not `require()`. If TypeScript is used, it must be configured to
[output ES modules](https://www.typescriptlang.org/docs/handbook/esm-node.html),
not CommonJS.
# API
## modernErrorsCli
_Type_: `Plugin`
Plugin object to pass to the
[`plugins` option](https://github.com/ehmicky/modern-errors#adding-plugins) of
`ErrorClass.subclass()`.
## BaseError.exit(error)
`error`: `any`
Logs `error` on the console (`stderr`) then exits the process.
This never throws. Invalid errors are silently
[normalized](https://github.com/ehmicky/normalize-exception).
## Options
_Type_: `object`
### 🚨 exitCode
_Type_: `integer`\
_Default_: `1`
Process [exit code](https://en.wikipedia.org/wiki/Exit_status).
We recommend values between 1 and 124 because the following exit codes have some
special meaning:
- 0: success
- 125: invalid [`options`](#options)
- 126 to 255: used by shells like Bash
### 📕 stack
_Type_: `boolean`\
_Default_: `true`
Whether to log the error's stack trace.
#### cause
_Type_: `boolean`\
_Default_: `true`
Whether to show
[aggregate errors](https://github.com/ehmicky/modern-errors#aggregate-errors).
### 📢 props
_Type_: `boolean`\
_Default_: `true`
Whether to log the error's additional properties.
### 🔕 silent
_Type_: `boolean`\
_Default_: `false`
Exits the process without logging anything on the console.
### 🖍️ colors
_Type_: `boolean`\
_Default_: `true` in terminals, `false` otherwise
Whether to colorize the error's message, stack trace and additional properties.
Quoted strings in the error's message are printed in bold (for `"..."` and
`'...'`) and in italic (for `` `...` ``).
### ❌ icon
_Type_: `string`\
_Default_: `'cross'`
Icon prepended to the error's name. The available values are listed
[here](https://github.com/sindresorhus/figures/blob/main/readme.md#figures-1).
Can be disabled by passing an empty string.
### 💄 header
_Type_: `string`\
_Default_: `'red bold'`
Color/style of the error's [icon](#-icon) and name. The available values are
listed [here](https://github.com/ehmicky/chalk-string#available-styles). Several
styles can be specified by using spaces. Can be disabled by passing an empty
string.
### 🚒 timeout
_Type_: `integer` (in milliseconds)\
_Default_: `5000` (5 seconds)
The process exits gracefully: it waits for any ongoing tasks (callbacks,
promises, etc.) to complete, up to a specific `timeout`.
Special values:
- `0`: Exits right away, without waiting for ongoing tasks
- `Number.POSITIVE_INFINITY`: Waits for ongoing tasks forever, without timing
out
#### 📜 log
_Type_: `(string) => void`\
_Default_: `console.error`
Function used to print the error message.
## Configuration
[Options](#options) can apply to (in priority order):
- Any error: second argument to
[`ModernError.subclass()`](https://github.com/ehmicky/modern-errors#options-1)
```js
export const BaseError = ModernError.subclass('BaseError', {
plugins: [modernErrorsCli],
cli: options,
})
```
- Any error of a specific class (and its subclasses): second argument to
[`ErrorClass.subclass()`](https://github.com/ehmicky/modern-errors#options-1)
```js
export const InputError = BaseError.subclass('InputError', { cli: options })
```
- A specific error: second argument to
[`new ErrorClass()`](https://github.com/ehmicky/modern-errors#options-3)
```js
throw new InputError('...', { cli: options })
```
- A specific [`BaseError.exit(error)`](#baseerrorexiterror) call
```js
BaseError.exit(error, options)
```
# Related projects
- [`handle-cli-error`](https://github.com/ehmicky/handle-cli-error): 💣 Error
handler for CLI applications 💥
- [`beautiful-error`](https://github.com/ehmicky/beautiful-error): Prettify
error messages and stacks
- [`modern-errors`](https://github.com/ehmicky/modern-errors): Handle errors in
a simple, stable, consistent way
- [`modern-errors-beautiful`](https://github.com/ehmicky/modern-errors-beautiful):
Prettify errors messages and stacks
- [`modern-errors-process`](https://github.com/ehmicky/modern-errors-process):
Handle process errors
- [`modern-errors-bugs`](https://github.com/ehmicky/modern-errors-bugs): Print
where to report bugs
- [`modern-errors-serialize`](https://github.com/ehmicky/modern-errors-serialize):
Serialize/parse errors
- [`modern-errors-clean`](https://github.com/ehmicky/modern-errors-clean): Clean
stack traces
- [`modern-errors-http`](https://github.com/ehmicky/modern-errors-http): Create
HTTP error responses
- [`modern-errors-winston`](https://github.com/ehmicky/modern-errors-winston):
Log errors with Winston
- [`modern-errors-switch`](https://github.com/ehmicky/modern-errors-switch):
Execute class-specific logic
# Support
For any question, _don't hesitate_ to [submit an issue on GitHub](../../issues).
Everyone is welcome regardless of personal background. We enforce a
[Code of conduct](CODE_OF_CONDUCT.md) in order to promote a positive and
inclusive environment.
# Contributing
This project was made with ❤️. The simplest way to give back is by starring and
sharing it online.
If the documentation is unclear or has a typo, please click on the page's `Edit`
button (pencil icon) and suggest a correction.
If you would like to help us fix a bug or add a new feature, please check our
[guidelines](CONTRIBUTING.md). Pull requests are welcome!