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