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'use strict'
var path = require('path')
var fs = require('graceful-fs')
var iferr = require('iferr')
var inflateShrinkwrap = require('./inflate-shrinkwrap.js')
var parseJSON = require('../utils/parse-json.js')
var readShrinkwrap = module.exports = function (child, next) {
fs.readFile(path.join(child.path, 'npm-shrinkwrap.json'), function (er, data) {
if (er) {
child.package._shrinkwrap = null
return next()
}
try {
child.package._shrinkwrap = parseJSON(data)
} catch (ex) {
child.package._shrinkwrap = null
return next(ex)
}
return next()
})
}
module.exports.andInflate = function (child, next) {
readShrinkwrap(child, iferr(next, function () {
if (child.package._shrinkwrap) {
return inflateShrinkwrap(child, child.package._shrinkwrap.dependencies || {}, next)
} else {
return next()
}
}))
}