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Mini Shell
Mini Shell
'use strict'
// walk the tree of deps starting from the top level list of bundled deps
// Any deps at the top level that are depended on by a bundled dep that
// does not have that dep in its own node_modules folder are considered
// bundled deps as well. This list of names can be passed to npm-packlist
// as the "bundled" argument. Additionally, packageJsonCache is shared so
// packlist doesn't have to re-read files already consumed in this pass
const fs = require('fs')
const path = require('path')
const EE = require('events').EventEmitter
// we don't care about the package bins, but we share a pj cache
// with other modules that DO care about it, so keep it nice.
const normalizePackageBin = require('npm-normalize-package-bin')
class BundleWalker extends EE {
constructor (opt) {
opt = opt || {}
super(opt)
this.path = path.resolve(opt.path || process.cwd())
this.parent = opt.parent || null
if (this.parent) {
this.result = this.parent.result
// only collect results in node_modules folders at the top level
// since the node_modules in a bundled dep is included always
if (!this.parent.parent) {
const base = path.basename(this.path)
const scope = path.basename(path.dirname(this.path))
this.result.add(/^@/.test(scope) ? scope + '/' + base : base)
}
this.root = this.parent.root
this.packageJsonCache = this.parent.packageJsonCache
} else {
this.result = new Set()
this.root = this.path
this.packageJsonCache = opt.packageJsonCache || new Map()
}
this.seen = new Set()
this.didDone = false
this.children = 0
this.node_modules = []
this.package = null
this.bundle = null
}
addListener (ev, fn) {
return this.on(ev, fn)
}
on (ev, fn) {
const ret = super.on(ev, fn)
if (ev === 'done' && this.didDone) {
this.emit('done', this.result)
}
return ret
}
done () {
if (!this.didDone) {
this.didDone = true
if (!this.parent) {
const res = Array.from(this.result)
this.result = res
this.emit('done', res)
} else {
this.emit('done')
}
}
}
start () {
const pj = path.resolve(this.path, 'package.json')
if (this.packageJsonCache.has(pj))
this.onPackage(this.packageJsonCache.get(pj))
else
this.readPackageJson(pj)
return this
}
readPackageJson (pj) {
fs.readFile(pj, (er, data) =>
er ? this.done() : this.onPackageJson(pj, data))
}
onPackageJson (pj, data) {
try {
this.package = normalizePackageBin(JSON.parse(data + ''))
} catch (er) {
return this.done()
}
this.packageJsonCache.set(pj, this.package)
this.onPackage(this.package)
}
allDepsBundled (pkg) {
return Object.keys(pkg.dependencies || {}).concat(
Object.keys(pkg.optionalDependencies || {}))
}
onPackage (pkg) {
// all deps are bundled if we got here as a child.
// otherwise, only bundle bundledDeps
// Get a unique-ified array with a short-lived Set
const bdRaw = this.parent ? this.allDepsBundled(pkg)
: pkg.bundleDependencies || pkg.bundledDependencies || []
const bd = Array.from(new Set(
Array.isArray(bdRaw) ? bdRaw
: bdRaw === true ? this.allDepsBundled(pkg)
: Object.keys(bdRaw)))
if (!bd.length)
return this.done()
this.bundle = bd
const nm = this.path + '/node_modules'
this.readModules()
}
readModules () {
readdirNodeModules(this.path + '/node_modules', (er, nm) =>
er ? this.onReaddir([]) : this.onReaddir(nm))
}
onReaddir (nm) {
// keep track of what we have, in case children need it
this.node_modules = nm
this.bundle.forEach(dep => this.childDep(dep))
if (this.children === 0)
this.done()
}
childDep (dep) {
if (this.node_modules.indexOf(dep) !== -1) {
if (!this.seen.has(dep)) {
this.seen.add(dep)
this.child(dep)
}
} else if (this.parent) {
this.parent.childDep(dep)
}
}
child (dep) {
const p = this.path + '/node_modules/' + dep
this.children += 1
const child = new BundleWalker({
path: p,
parent: this
})
child.on('done', _ => {
if (--this.children === 0)
this.done()
})
child.start()
}
}
class BundleWalkerSync extends BundleWalker {
constructor (opt) {
super(opt)
}
start () {
super.start()
this.done()
return this
}
readPackageJson (pj) {
try {
this.onPackageJson(pj, fs.readFileSync(pj))
} catch (er) {}
return this
}
readModules () {
try {
this.onReaddir(readdirNodeModulesSync(this.path + '/node_modules'))
} catch (er) {
this.onReaddir([])
}
}
child (dep) {
new BundleWalkerSync({
path: this.path + '/node_modules/' + dep,
parent: this
}).start()
}
}
const readdirNodeModules = (nm, cb) => {
fs.readdir(nm, (er, set) => {
if (er)
cb(er)
else {
const scopes = set.filter(f => /^@/.test(f))
if (!scopes.length)
cb(null, set)
else {
const unscoped = set.filter(f => !/^@/.test(f))
let count = scopes.length
scopes.forEach(scope => {
fs.readdir(nm + '/' + scope, (er, pkgs) => {
if (er || !pkgs.length)
unscoped.push(scope)
else
unscoped.push.apply(unscoped, pkgs.map(p => scope + '/' + p))
if (--count === 0)
cb(null, unscoped)
})
})
}
}
})
}
const readdirNodeModulesSync = nm => {
const set = fs.readdirSync(nm)
const unscoped = set.filter(f => !/^@/.test(f))
const scopes = set.filter(f => /^@/.test(f)).map(scope => {
try {
const pkgs = fs.readdirSync(nm + '/' + scope)
return pkgs.length ? pkgs.map(p => scope + '/' + p) : [scope]
} catch (er) {
return [scope]
}
}).reduce((a, b) => a.concat(b), [])
return unscoped.concat(scopes)
}
const walk = (options, callback) => {
const p = new Promise((resolve, reject) => {
new BundleWalker(options).on('done', resolve).on('error', reject).start()
})
return callback ? p.then(res => callback(null, res), callback) : p
}
const walkSync = options => {
return new BundleWalkerSync(options).start().result
}
module.exports = walk
walk.sync = walkSync
walk.BundleWalker = BundleWalker
walk.BundleWalkerSync = BundleWalkerSync
Zerion Mini Shell 1.0