/
findBin.js
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/
findBin.js
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'use strict'
const parse = require('string-argv')
const npmWhich = require('npm-which')(process.cwd())
const checkPkgScripts = require('./checkPkgScripts')
const debug = require('debug')('lint-staged:find-bin')
// Find and load the package.json at the root of the project.
let pkg
try {
// eslint-disable-next-line import/no-dynamic-require, global-require
pkg = require(`${process.cwd()}/package.json`)
debug('Loaded package.json using `process.cwd()`')
} catch (ignore) {
debug('Could not load package.json using `process.cwd()`')
pkg = {}
}
const cache = new Map()
module.exports = function findBin(cmd) {
debug('Resolving binary for command `%s`', cmd)
/*
* Try to locate the binary in node_modules/.bin and if this fails, in
* $PATH.
*
* This allows to use linters installed for the project:
*
* "lint-staged": {
* "*.js": "eslint"
* }
*/
const [binName, ...args] = parse(cmd)
if (cache.has(binName)) {
debug('Resolving binary for `%s` from cache', binName)
return { bin: cache.get(binName), args }
}
try {
/* npm-which tries to resolve the bin in local node_modules/.bin */
/* and if this fails it look in $PATH */
const bin = npmWhich.sync(binName)
debug('Binary for `%s` resolved to `%s`', cmd, bin)
cache.set(binName, bin)
return { bin, args }
} catch (err) {
// throw helpful error if matching script is present in package.json
checkPkgScripts(pkg, cmd, binName, args)
throw new Error(`${binName} could not be found. Try \`npm install ${binName}\`.`)
}
}