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'use strict'
const BB = require('bluebird')
const fs = require('graceful-fs')
const iferr = require('iferr')
const inflateShrinkwrap = require('./inflate-shrinkwrap.js')
const log = require('npmlog')
const parseJSON = require('../utils/parse-json.js')
const path = require('path')
const PKGLOCK_VERSION = require('../npm.js').lockfileVersion
const readFileAsync = BB.promisify(fs.readFile)
module.exports = readShrinkwrap
function readShrinkwrap (child, next) {
if (child.package._shrinkwrap) return process.nextTick(next)
BB.join(
maybeReadFile('npm-shrinkwrap.json', child),
// Don't read non-root lockfiles
child.isTop && maybeReadFile('package-lock.json', child),
child.isTop && maybeReadFile('package.json', child),
(shrinkwrap, lockfile, pkgJson) => {
if (shrinkwrap && lockfile) {
log.warn('read-shrinkwrap', 'Ignoring package-lock.json because there is already an npm-shrinkwrap.json. Please use only one of the two.')
}
const name = shrinkwrap ? 'npm-shrinkwrap.json' : 'package-lock.json'
let parsed = null
if (shrinkwrap || lockfile) {
try {
parsed = parseJSON(shrinkwrap || lockfile)
} catch (ex) {
throw ex
}
}
if (parsed && parsed.lockfileVersion !== PKGLOCK_VERSION) {
log.warn('read-shrinkwrap', `This version of npm is compatible with lockfileVersion@${PKGLOCK_VERSION}, but ${name} was generated for lockfileVersion@${parsed.lockfileVersion || 0}. I'll try to do my best with it!`)
}
child.package._shrinkwrap = parsed
}
).then(() => next(), next)
}
function maybeReadFile (name, child) {
return readFileAsync(
path.join(child.path, name)
).catch({code: 'ENOENT'}, () => null)
}
module.exports.andInflate = function (child, next) {
readShrinkwrap(child, iferr(next, function () {
if (child.package._shrinkwrap) {
return inflateShrinkwrap(child, child.package._shrinkwrap || {}, next)
} else {
return next()
}
}))
}