vfile-find-up

vfile utility to find files by searching the file system upwards.

Contents

• What is this?
• When should I use this?
• Install
• Use
• API
  • findUp(tests[, path][, callback])
  • findUpOne(test[, path][, callback])
  • BREAK
  • INCLUDE
  • Assert
  • Callback
  • CallbackOne
  • Test
• Types
• Compatibility
• Contribute
• License

What is this?

This utility lets you find one or many files upwards.

When should I use this?

You can use this utility if you want to find, say, a config file. If you instead want to find files downwards, such as all markdown files in a folder, you can use vfile-find-down.

Install

This package is ESM only. In Node.js (version 14.14+ and 16.0+), install with npm:

npm install vfile-find-up

Use

import {findUp} from 'vfile-find-up'

console.log(await findUp('package.json'))

Yields:

[ VFile {
  data: {},
  messages: [],
  history: [ '/Users/tilde/projects/oss/vfile-find-up/package.json' ],
  cwd: '/Users/tilde/projects/oss/vfile-find-up' } ]

API

This package exports the identifiers BREAK, INCLUDE, findUp, and findUpOne. There is no default export.

findUp(tests[, path][, callback])

Find files or folders upwards.

👉 Note: files are not read (their value is not populated).

Signatures

• (test[, path], callback) => void
• (test[, path]) => Promise<Array<VFile>>

Parameters

• test (Test) — things to search for
• paths (string, default: process.cwd()) — place to search from
• callback (Callback, optional) — callback called when done

Returns

Nothing when callback is given (void), otherwise a promise that resolves to files (Array<VFile>).

findUpOne(test[, path][, callback])

Find the first file or folder upwards.

👉 Note: files are not read (their value is not populated).

Signatures

• (test[, path], callback) => void
• (test[, path]) => Promise<VFile>

Parameters

• test (Test) — things to search for
• path (string, default: process.cwd()) — place to search from
• callback (CallbackOne, optional) — callback called when done

Returns

Nothing when callback is given (void), otherwise a promise that resolves to a file (VFile | null).

BREAK

Stop searching (number).

INCLUDE

Include this file (number).

Assert

Handle a file (TypeScript type).

Parameters

• file (VFile) — file to handle

Returns

How to handle this file (boolean | number, optional).

true is treated as INCLUDE.

Callback

Callback called when done (TypeScript type).

Parameters

• error (Error | null) — error; errors are currently never passed
• files (Array<VFile>) — files

Returns

Nothing (void).

CallbackOne

Callback called when done finding one file (TypeScript type).

Parameters

• error (Error | null) — error; errors are currently never passed
• file (VFile | null) — file

Returns

Nothing (void).

Test

Things to search for (TypeScript type).

For strings, the basename or extname of files must match them. For arrays, any test in them must match.

Type

type Test = Array<Assert | string> | Assert | string

Types

This package is fully typed with TypeScript. It exports the additional types Assert, Callback, CallbackOne, and Test.

Compatibility

Projects maintained by the unified collective are compatible with all maintained versions of Node.js. As of now, that is Node.js 14.14+ and 16.0+. Our projects sometimes work with older versions, but this is not guaranteed.

Contribute

See contributing.md in vfile/.github for ways to get started. See support.md for ways to get help.

This project has a code of conduct. By interacting with this repository, organization, or community you agree to abide by its terms.

License

MIT © Titus Wormer