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const Fetcher = require('./fetcher.js')
const fsm = require('fs-minipass')
const cacache = require('cacache')
const { promisify } = require('util')
const readPackageJson = require('read-package-json-fast')
const _tarballFromResolved = Symbol.for('pacote.Fetcher._tarballFromResolved')
const _exeBins = Symbol('_exeBins')
const { resolve } = require('path')
const fs = require('fs')
class FileFetcher extends Fetcher {
constructor (spec, opts) {
super(spec, opts)
// just the fully resolved filename
this.resolved = this.spec.fetchSpec
}
get types () {
return ['file']
}
manifest () {
if (this.package)
return Promise.resolve(this.package)
// have to unpack the tarball for this.
return cacache.tmp.withTmp(this.cache, this.opts, dir =>
this.extract(dir)
.then(() => readPackageJson(dir + '/package.json'))
.then(mani => this.package = {
...mani,
_integrity: this.integrity && String(this.integrity),
_resolved: this.resolved,
_from: this.from,
}))
}
[_exeBins] (pkg, dest) {
if (!pkg.bin)
return Promise.resolve()
return Promise.all(Object.keys(pkg.bin).map(k => new Promise(res => {
const script = resolve(dest, pkg.bin[k])
// Best effort. Ignore errors here, the only result is that
// a bin script is not executable. But if it's missing or
// something, we just leave it for a later stage to trip over
// when we can provide a more useful contextual error.
fs.stat(script, (er, st) => {
if (er)
return res()
const mode = st.mode | 0o111
if (mode === st.mode)
return res()
fs.chmod(script, mode, res)
})
})))
}
extract (dest) {
// if we've already loaded the manifest, then the super got it.
// but if not, read the unpacked manifest and chmod properly.
return super.extract(dest)
.then(result => this.package ? result
: readPackageJson(dest + '/package.json').then(pkg =>
this[_exeBins](pkg, dest)).then(() => result))
}
[_tarballFromResolved] () {
// create a read stream and return it
return new fsm.ReadStream(this.resolved)
}
packument () {
// simulate based on manifest
return this.manifest().then(mani => ({
name: mani.name,
'dist-tags': {
[this.defaultTag]: mani.version
},
versions: {
[mani.version]: {
...mani,
dist: {
tarball: `file:${this.resolved}`,
integrity: this.integrity && String(this.integrity),
}
}
}
}))
}
}
module.exports = FileFetcher