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'use strict'
const BB = require('bluebird')
const extractStream = require('./lib/extract-stream.js')
const fs = require('fs')
const mkdirp = BB.promisify(require('mkdirp'))
const npa = require('npm-package-arg')
const optCheck = require('./lib/util/opt-check.js')
const path = require('path')
const rimraf = BB.promisify(require('rimraf'))
const withTarballStream = require('./lib/with-tarball-stream.js')
const truncateAsync = BB.promisify(fs.truncate)
const readFileAsync = BB.promisify(fs.readFile)
const appendFileAsync = BB.promisify(fs.appendFile)
module.exports = extract
function extract (spec, dest, opts) {
opts = optCheck(opts)
spec = npa(spec, opts.where)
const startTime = Date.now()
return withTarballStream(spec, opts, stream => {
return tryExtract(spec, stream, dest, opts)
})
.then(() => {
if (!opts.resolved) {
const pjson = path.join(dest, 'package.json')
return readFileAsync(pjson, 'utf8')
.then(str => truncateAsync(pjson)
.then(() => appendFileAsync(pjson, str.replace(
/}\s*$/,
`\n,"_resolved": ${
JSON.stringify(opts.resolved || '')
}\n,"_integrity": ${
JSON.stringify(opts.integrity || '')
}\n,"_from": ${
JSON.stringify(spec.toString())
}\n}`
))))
}
})
.then(() => opts.log.silly(
'extract',
`${spec} extracted to ${dest} (${Date.now() - startTime}ms)`
))
}
function tryExtract (spec, tarStream, dest, opts) {
return new BB((resolve, reject) => {
tarStream.on('error', reject)
setImmediate(resolve)
})
.then(() => rimraf(dest))
.then(() => mkdirp(dest))
.then(() => new BB((resolve, reject) => {
const xtractor = extractStream(spec, dest, opts)
tarStream.on('error', reject)
xtractor.on('error', reject)
xtractor.on('close', resolve)
tarStream.pipe(xtractor)
}))
.catch(err => {
if (err.code === 'EINTEGRITY') {
err.message = `Verification failed while extracting ${spec}:\n${err.message}`
}
throw err
})
}