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61 lines
1.7 KiB
61 lines
1.7 KiB
'use strict'
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const gunzip = require('./util/gunzip-maybe')
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const path = require('path')
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const pipeline = require('mississippi').pipeline
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const tar = require('tar-fs')
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module.exports = extractStream
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function extractStream (dest, opts) {
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opts = opts || {}
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const sawIgnores = {}
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return pipeline(gunzip(), tar.extract(dest, {
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map: (header) => {
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if (process.platform !== 'win32') {
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header.uid = opts.uid == null ? header.uid : opts.uid
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header.gid = opts.gid == null ? header.gid : opts.gid
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}
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// Note: This mirrors logic in the fs read operations that are
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// employed during tarball creation, in the fstream-npm module.
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// It is duplicated here to handle tarballs that are created
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// using other means, such as system tar or git archive.
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if (header.type === 'file') {
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const base = path.basename(header.name)
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if (base === '.npmignore') {
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sawIgnores[header.name] = true
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} else if (base === '.gitignore') {
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const npmignore = header.name.replace(/\.gitignore$/, '.npmignore')
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if (!sawIgnores[npmignore]) {
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// Rename, may be clobbered later.
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header.name = npmignore
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}
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}
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}
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return header
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},
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ignore: makeIgnore(opts.log),
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dmode: opts.dmode,
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fmode: opts.fmode,
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umask: opts.umask,
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strip: 1
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}))
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}
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function makeIgnore (log) {
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const sawIgnores = {}
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return (name, header) => _ignore(name, header, sawIgnores, log)
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}
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function _ignore (name, header, sawIgnores, logger) {
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if (header.type.match(/^.*link$/)) {
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if (logger) {
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logger.warn(
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'extract-stream',
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'excluding symbolic link',
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header.name, '->', header.linkname)
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}
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return true
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}
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return false
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}
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