Current File : //proc/self/root/usr/src/node-v0.10.4/deps/npm/lib/install.js
// npm install <pkg> <pkg> <pkg>
//
// See doc/install.md for more description
// Managing contexts...
// there's a lot of state associated with an "install" operation, including
// packages that are already installed, parent packages, current shrinkwrap, and
// so on. We maintain this state in a "context" object that gets passed around.
// every time we dive into a deeper node_modules folder, the "family" list that
// gets passed along uses the previous "family" list as its __proto__. Any
// "resolved precise dependency" things that aren't already on this object get
// added, and then that's passed to the next generation of installation.
module.exports = install
install.usage = "npm install"
+ "\nnpm install <pkg>"
+ "\nnpm install <pkg>@<tag>"
+ "\nnpm install <pkg>@<version>"
+ "\nnpm install <pkg>@<version range>"
+ "\nnpm install <folder>"
+ "\nnpm install <tarball file>"
+ "\nnpm install <tarball url>"
+ "\nnpm install <git:// url>"
+ "\nnpm install <github username>/<github project>"
+ "\n\nCan specify one or more: npm install ./foo.tgz bar@stable /some/folder"
+ "\nIf no argument is supplied and ./npm-shrinkwrap.json is "
+ "\npresent, installs dependencies specified in the shrinkwrap."
+ "\nOtherwise, installs dependencies from ./package.json."
install.completion = function (opts, cb) {
// install can complete to a folder with a package.json, or any package.
// if it has a slash, then it's gotta be a folder
// if it starts with https?://, then just give up, because it's a url
// for now, not yet implemented.
var registry = npm.registry
registry.get("/-/short", function (er, pkgs) {
if (er) return cb()
if (!opts.partialWord) return cb(null, pkgs)
var name = opts.partialWord.split("@").shift()
pkgs = pkgs.filter(function (p) {
return p.indexOf(name) === 0
})
if (pkgs.length !== 1 && opts.partialWord === name) {
return cb(null, pkgs)
}
registry.get(pkgs[0], function (er, d) {
if (er) return cb()
return cb(null, Object.keys(d["dist-tags"] || {})
.concat(Object.keys(d.versions || {}))
.map(function (t) {
return pkgs[0] + "@" + t
}))
})
})
}
var npm = require("./npm.js")
, semver = require("semver")
, readJson = require("read-package-json")
, readInstalled = require("read-installed")
, log = require("npmlog")
, path = require("path")
, fs = require("graceful-fs")
, cache = require("./cache.js")
, asyncMap = require("slide").asyncMap
, chain = require("slide").chain
, url = require("url")
, mkdir = require("mkdirp")
, lifecycle = require("./utils/lifecycle.js")
, archy = require("archy")
function install (args, cb_) {
function cb (er, installed) {
if (er) return cb_(er)
findPeerInvalid(where, function (er, problem) {
if (er) return cb_(er)
if (problem) {
var peerInvalidError = new Error("The package " + problem.name +
" does not satisfy its siblings' peerDependencies requirements!")
peerInvalidError.code = "EPEERINVALID"
peerInvalidError.packageName = problem.name
peerInvalidError.peersDepending = problem.peersDepending
return cb(peerInvalidError)
}
var tree = treeify(installed || [])
, pretty = prettify(tree, installed).trim()
if (pretty) console.log(pretty)
save(where, installed, tree, pretty, cb_)
})
}
// the /path/to/node_modules/..
var where = path.resolve(npm.dir, "..")
// internal api: install(where, what, cb)
if (arguments.length === 3) {
where = args
args = [].concat(cb_) // pass in [] to do default dep-install
cb_ = arguments[2]
log.verbose("install", "where,what", [where, args])
}
if (!npm.config.get("global")) {
args = args.filter(function (a) {
return path.resolve(a) !== where
})
}
mkdir(where, function (er, made) {
if (er) return cb(er)
// install dependencies locally by default,
// or install current folder globally
if (!args.length) {
var opt = { dev: npm.config.get("dev") || !npm.config.get("production") }
if (npm.config.get("global")) args = ["."]
else return readDependencies(null, where, opt, function (er, data) {
if (er) {
log.error("install", "Couldn't read dependencies")
return cb(er)
}
var deps = Object.keys(data.dependencies || {})
log.verbose("install", "where, deps", [where, deps])
var context = { family: {}
, ancestors: {}
, explicit: false
, parent: data
, wrap: null }
if (data.name === path.basename(where) &&
path.basename(path.dirname(where)) === "node_modules") {
// Only include in ancestry if it can actually be required.
// Otherwise, it does not count.
context.family[data.name] =
context.ancestors[data.name] = data.version
}
installManyTop(deps.map(function (dep) {
var target = data.dependencies[dep]
, parsed = url.parse(target.replace(/^git\+/, "git"))
target = dep + "@" + target
return target
}), where, context, function(er, results) {
if (er) return cb(er, results)
lifecycle(data, "prepublish", where, function(er) {
return cb(er, results)
})
})
})
}
// initial "family" is the name:version of the root, if it's got
// a package.json file.
readJson(path.resolve(where, "package.json"), function (er, data) {
if (er && er.code !== "ENOENT" && er.code !== "ENOTDIR") return cb(er)
if (er) data = null
var context = { family: {}
, ancestors: {}
, explicit: true
, parent: data
, wrap: null }
if (data) {
context.family[data.name] = context.ancestors[data.name] = data.version
}
var fn = npm.config.get("global") ? installMany : installManyTop
fn(args, where, context, cb)
})
})
}
function findPeerInvalid (where, cb) {
readInstalled(where, function (er, data) {
if (er) return cb(er)
cb(null, findPeerInvalid_(data.dependencies, []))
})
}
function findPeerInvalid_ (packageMap, fpiList) {
if (fpiList.indexOf(packageMap) !== -1)
return
fpiList.push(packageMap)
for (var packageName in packageMap) {
var pkg = packageMap[packageName]
if (pkg.peerInvalid) {
var peersDepending = {};
for (peerName in packageMap) {
var peer = packageMap[peerName]
if (peer.peerDependencies && peer.peerDependencies[packageName]) {
peersDepending[peer.name + "@" + peer.version] =
peer.peerDependencies[packageName]
}
}
return { name: pkg.name, peersDepending: peersDepending }
}
if (pkg.dependencies) {
var invalid = findPeerInvalid_(pkg.dependencies, fpiList)
if (invalid)
return invalid
}
}
return null
}
// reads dependencies for the package at "where". There are several cases,
// depending on our current state and the package's configuration:
//
// 1. If "context" is specified, then we examine the context to see if there's a
// shrinkwrap there. In that case, dependencies are read from the shrinkwrap.
// 2. Otherwise, if an npm-shrinkwrap.json file is present, dependencies are
// read from there.
// 3. Otherwise, dependencies come from package.json.
//
// Regardless of which case we fall into, "cb" is invoked with a first argument
// describing the full package (as though readJson had been used) but with
// "dependencies" read as described above. The second argument to "cb" is the
// shrinkwrap to use in processing this package's dependencies, which may be
// "wrap" (in case 1) or a new shrinkwrap (in case 2).
function readDependencies (context, where, opts, cb) {
var wrap = context ? context.wrap : null
readJson( path.resolve(where, "package.json")
, function (er, data) {
if (er) return cb(er)
if (opts && opts.dev) {
if (!data.dependencies) data.dependencies = {}
Object.keys(data.devDependencies || {}).forEach(function (k) {
data.dependencies[k] = data.devDependencies[k]
})
}
if (!npm.config.get("optional") && data.optionalDependencies) {
Object.keys(data.optionalDependencies).forEach(function (d) {
delete data.dependencies[d]
})
}
if (wrap) {
log.verbose("readDependencies: using existing wrap", [where, wrap])
var rv = {}
Object.keys(data).forEach(function (key) {
rv[key] = data[key]
})
rv.dependencies = {}
Object.keys(wrap).forEach(function (key) {
log.verbose("from wrap", [key, wrap[key]])
rv.dependencies[key] = readWrap(wrap[key])
})
log.verbose("readDependencies returned deps", rv.dependencies)
return cb(null, rv, wrap)
}
var wrapfile = path.resolve(where, "npm-shrinkwrap.json")
fs.readFile(wrapfile, "utf8", function (er, wrapjson) {
if (er) {
log.verbose("readDependencies", "using package.json deps")
return cb(null, data, null)
}
try {
var newwrap = JSON.parse(wrapjson)
} catch (ex) {
return cb(ex)
}
log.info("shrinkwrap", "file %j", wrapfile)
var rv = {}
Object.keys(data).forEach(function (key) {
rv[key] = data[key]
})
rv.dependencies = {}
Object.keys(newwrap.dependencies || {}).forEach(function (key) {
rv.dependencies[key] = readWrap(newwrap.dependencies[key])
})
log.verbose("readDependencies returned deps", rv.dependencies)
return cb(null, rv, newwrap.dependencies)
})
})
}
function readWrap (w) {
return (w.resolved) ? w.resolved
: (w.from && url.parse(w.from).protocol) ? w.from
: w.version
}
// if the -S|--save option is specified, then write installed packages
// as dependencies to a package.json file.
// This is experimental.
function save (where, installed, tree, pretty, cb) {
if (!npm.config.get("save") &&
!npm.config.get("save-dev") &&
!npm.config.get("save-optional") ||
npm.config.get("global")) {
return cb(null, installed, tree, pretty)
}
var saveBundle = npm.config.get('save-bundle')
// each item in the tree is a top-level thing that should be saved
// to the package.json file.
// The relevant tree shape is { <folder>: {what:<pkg>} }
var saveTarget = path.resolve(where, "package.json")
, things = Object.keys(tree).map(function (k) {
// if "what" was a url, then save that instead.
var t = tree[k]
, u = url.parse(t.from)
, w = t.what.split("@")
if (u && u.protocol) w[1] = t.from
return w
}).reduce(function (set, k) {
var rangeDescriptor = semver.valid(k[1]) &&
semver.gte(k[1], "0.1.0")
? "~" : ""
set[k[0]] = rangeDescriptor + k[1]
return set
}, {})
// don't use readJson, because we don't want to do all the other
// tricky npm-specific stuff that's in there.
fs.readFile(saveTarget, function (er, data) {
// ignore errors here, just don't save it.
try {
data = JSON.parse(data.toString("utf8"))
} catch (ex) {
er = ex
}
if (er) {
return cb(null, installed, tree, pretty)
}
var deps = npm.config.get("save-optional") ? "optionalDependencies"
: npm.config.get("save-dev") ? "devDependencies"
: "dependencies"
if (saveBundle) {
var bundle = data.bundleDependencies || data.bundledDependencies
delete data.bundledDependencies
if (!Array.isArray(bundle)) bundle = []
data.bundleDependencies = bundle
}
log.verbose('saving', things)
data[deps] = data[deps] || {}
Object.keys(things).forEach(function (t) {
data[deps][t] = things[t]
if (saveBundle) {
var i = bundle.indexOf(t)
if (i === -1) bundle.push(t)
}
})
data = JSON.stringify(data, null, 2) + "\n"
fs.writeFile(saveTarget, data, function (er) {
cb(er, installed, tree, pretty)
})
})
}
// Outputting *all* the installed modules is a bit confusing,
// because the length of the path does not make it clear
// that the submodules are not immediately require()able.
// TODO: Show the complete tree, ls-style, but only if --long is provided
function prettify (tree, installed) {
if (npm.config.get("json")) {
function red (set, kv) {
set[kv[0]] = kv[1]
return set
}
tree = Object.keys(tree).map(function (p) {
if (!tree[p]) return null
var what = tree[p].what.split("@")
, name = what.shift()
, version = what.join("@")
, o = { name: name, version: version, from: tree[p].from }
o.dependencies = tree[p].children.map(function P (dep) {
var what = dep.what.split("@")
, name = what.shift()
, version = what.join("@")
, o = { version: version, from: dep.from }
o.dependencies = dep.children.map(P).reduce(red, {})
return [name, o]
}).reduce(red, {})
return o
})
return JSON.stringify(tree, null, 2)
}
if (npm.config.get("parseable")) return parseable(installed)
return Object.keys(tree).map(function (p) {
return archy({ label: tree[p].what + " " + p
, nodes: (tree[p].children || []).map(function P (c) {
if (npm.config.get("long")) {
return { label: c.what, nodes: c.children.map(P) }
}
var g = c.children.map(function (g) {
return g.what
}).join(", ")
if (g) g = " (" + g + ")"
return c.what + g
})
})
}).join("\n")
}
function parseable (installed) {
var long = npm.config.get("long")
, cwd = process.cwd()
return installed.map(function (item) {
return path.resolve(cwd, item[1]) +
( long ? ":" + item[0] : "" )
}).join("\n")
}
function treeify (installed) {
// each item is [what, where, parent, parentDir]
// If no parent, then report it.
// otherwise, tack it into the parent's children list.
// If the parent isn't a top-level then ignore it.
var whatWhere = installed.reduce(function (l, r) {
var parentDir = r[3]
, parent = r[2]
, where = r[1]
, what = r[0]
, from = r[4]
l[where] = { parentDir: parentDir
, parent: parent
, children: []
, where: where
, what: what
, from: from }
return l
}, {})
// log.warn("install", whatWhere, "whatWhere")
return Object.keys(whatWhere).reduce(function (l, r) {
var ww = whatWhere[r]
//log.warn("r, ww", [r, ww])
if (!ww.parent) {
l[r] = ww
} else {
var p = whatWhere[ww.parentDir]
if (p) p.children.push(ww)
else l[r] = ww
}
return l
}, {})
}
// just like installMany, but also add the existing packages in
// where/node_modules to the family object.
function installManyTop (what, where, context, cb_) {
function cb (er, d) {
if (context.explicit || er) return cb_(er, d)
// since this wasn't an explicit install, let's build the top
// folder, so that `npm install` also runs the lifecycle scripts.
npm.commands.build([where], false, true, function (er) {
return cb_(er, d)
})
}
if (context.explicit) return next()
readJson(path.join(where, "package.json"), function (er, data) {
if (er) return next(er)
lifecycle(data, "preinstall", where, next)
})
function next (er) {
if (er) return cb(er)
installManyTop_(what, where, context, cb)
}
}
function installManyTop_ (what, where, context, cb) {
var nm = path.resolve(where, "node_modules")
, names = context.explicit
? what.map(function (w) { return w.split(/@/).shift() })
: []
fs.readdir(nm, function (er, pkgs) {
if (er) return installMany(what, where, context, cb)
pkgs = pkgs.filter(function (p) {
return !p.match(/^[\._-]/)
})
asyncMap(pkgs.map(function (p) {
return path.resolve(nm, p, "package.json")
}), function (jsonfile, cb) {
readJson(jsonfile, function (er, data) {
if (er && er.code !== "ENOENT" && er.code !== "ENOTDIR") return cb(er)
if (er) return cb(null, [])
return cb(null, [[data.name, data.version]])
})
}, function (er, packages) {
// if there's nothing in node_modules, then don't freak out.
if (er) packages = []
// add all the existing packages to the family list.
// however, do not add to the ancestors list.
packages.forEach(function (p) {
context.family[p[0]] = p[1]
})
return installMany(what, where, context, cb)
})
})
}
function installMany (what, where, context, cb) {
// readDependencies takes care of figuring out whether the list of
// dependencies we'll iterate below comes from an existing shrinkwrap from a
// parent level, a new shrinkwrap at this level, or package.json at this
// level, as well as which shrinkwrap (if any) our dependencies should use.
var opt = { dev: npm.config.get("dev") }
readDependencies(context, where, opt, function (er, data, wrap) {
if (er) data = {}
var parent = data
var d = data.dependencies || {}
// if we're explicitly installing "what" into "where", then the shrinkwrap
// for "where" doesn't apply. This would be the case if someone were adding
// a new package to a shrinkwrapped package. (data.dependencies will not be
// used here except to indicate what packages are already present, so
// there's no harm in using that.)
if (context.explicit) wrap = null
// what is a list of things.
// resolve each one.
asyncMap( what
, targetResolver(where, context, d)
, function (er, targets) {
if (er) return cb(er)
// each target will be a data object corresponding
// to a package, folder, or whatever that is in the cache now.
var newPrev = Object.create(context.family)
, newAnc = Object.create(context.ancestors)
newAnc[data.name] = data.version
targets.forEach(function (t) {
newPrev[t.name] = t.version
})
log.silly("resolved", targets)
targets.filter(function (t) { return t }).forEach(function (t) {
log.info("install", "%s into %s", t._id, where)
})
asyncMap(targets, function (target, cb) {
log.info("installOne", target._id)
var newWrap = wrap ? wrap[target.name].dependencies || {} : null
var newContext = { family: newPrev
, ancestors: newAnc
, parent: parent
, explicit: false
, wrap: newWrap }
installOne(target, where, newContext, cb)
}, cb)
})
})
}
function targetResolver (where, context, deps) {
var alreadyInstalledManually = context.explicit ? [] : null
, nm = path.resolve(where, "node_modules")
, parent = context.parent
, wrap = context.wrap
if (!context.explicit) fs.readdir(nm, function (er, inst) {
if (er) return alreadyInstalledManually = []
// don't even mess with non-package looking things
inst = inst.filter(function (p) {
return !p.match(/^[\._-]/)
})
asyncMap(inst, function (pkg, cb) {
readJson(path.resolve(nm, pkg, "package.json"), function (er, d) {
if (er && er.code !== "ENOENT" && er.code !== "ENOTDIR") return cb(er)
// error means it's not a package, most likely.
if (er) return cb(null, [])
// if it's a bundled dep, then assume that anything there is valid.
// otherwise, make sure that it's a semver match with what we want.
var bd = parent.bundleDependencies
if (bd && bd.indexOf(d.name) !== -1 ||
semver.satisfies(d.version, deps[d.name] || "*")) {
return cb(null, d.name)
}
// something is there, but it's not satisfactory. Clobber it.
return cb(null, [])
})
}, function (er, inst) {
// this is the list of things that are valid and should be ignored.
alreadyInstalledManually = inst
})
})
var to = 0
return function resolver (what, cb) {
if (!alreadyInstalledManually) return setTimeout(function () {
resolver(what, cb)
}, to++)
// now we know what's been installed here manually,
// or tampered with in some way that npm doesn't want to overwrite.
if (alreadyInstalledManually.indexOf(what.split("@").shift()) !== -1) {
log.verbose("already installed", "skipping %s %s", what, where)
return cb(null, [])
}
// check for a version installed higher in the tree.
// If installing from a shrinkwrap, it must match exactly.
if (context.family[what]) {
if (wrap && wrap[what].version === context.family[what]) {
log.verbose("shrinkwrap", "use existing", what)
return cb(null, [])
}
}
// if it's identical to its parent, then it's probably someone
// doing `npm install foo` inside of the foo project. Print
// a warning, and skip it.
if (parent && parent.name === what && !npm.config.get("force")) {
log.warn("install", "Refusing to install %s as a dependency of itself"
, what)
return cb(null, [])
}
if (wrap) {
var name = what.split(/@/).shift()
if (wrap[name]) {
var wrapTarget = readWrap(wrap[name])
what = name + "@" + wrapTarget
} else {
log.verbose("shrinkwrap", "skipping %s (not in shrinkwrap)", what)
}
} else if (deps[what]) {
what = what + "@" + deps[what]
}
cache.add(what, function (er, data) {
if (er && parent && parent.optionalDependencies &&
parent.optionalDependencies.hasOwnProperty(what.split("@")[0])) {
log.warn("optional dep failed, continuing", what)
log.verbose("optional dep failed, continuing", [what, er])
return cb(null, [])
}
if (!er &&
data &&
!context.explicit &&
context.family[data.name] === data.version &&
!npm.config.get("force")) {
log.info("already installed", data.name + "@" + data.version)
return cb(null, [])
}
if (data && !data._from) data._from = what
return cb(er, data || [])
})
}
}
// we've already decided to install this. if anything's in the way,
// then uninstall it first.
function installOne (target, where, context, cb) {
// the --link flag makes this a "link" command if it's at the
// the top level.
if (where === npm.prefix && npm.config.get("link")
&& !npm.config.get("global")) {
return localLink(target, where, context, cb)
}
installOne_(target, where, context, function (er, installedWhat) {
// check if this one is optional to its parent.
if (er && context.parent && context.parent.optionalDependencies &&
context.parent.optionalDependencies.hasOwnProperty(target.name)) {
log.warn("optional dep failed, continuing", target._id)
log.verbose("optional dep failed, continuing", [target._id, er])
er = null
}
cb(er, installedWhat)
})
}
function localLink (target, where, context, cb) {
log.verbose("localLink", target._id)
var jsonFile = path.resolve( npm.globalDir, target.name
, "package.json" )
, parent = context.parent
readJson(jsonFile, function (er, data) {
if (er && er.code !== "ENOENT" && er.code !== "ENOTDIR") return cb(er)
if (er || data._id === target._id) {
if (er) {
install( path.resolve(npm.globalDir, "..")
, target._id
, function (er) {
if (er) return cb(er, [])
thenLink()
})
} else thenLink()
function thenLink () {
npm.commands.link([target.name], function (er, d) {
log.silly("localLink", "back from link", [er, d])
cb(er, [resultList(target, where, parent && parent._id)])
})
}
} else {
log.verbose("localLink", "install locally (no link)", target._id)
installOne_(target, where, context, cb)
}
})
}
function resultList (target, where, parentId) {
var nm = path.resolve(where, "node_modules")
, targetFolder = path.resolve(nm, target.name)
, prettyWhere = where
if (!npm.config.get("global")) {
prettyWhere = path.relative(process.cwd(), where)
}
if (prettyWhere === ".") prettyWhere = null
if (!npm.config.get("global")) {
// print out the folder relative to where we are right now.
targetFolder = path.relative(process.cwd(), targetFolder)
}
return [ target._id
, targetFolder
, prettyWhere && parentId
, parentId && prettyWhere
, target._from ]
}
// name => install locations
var installOnesInProgress = Object.create(null)
function isIncompatibleInstallOneInProgress(target, where) {
return target.name in installOnesInProgress &&
installOnesInProgress[target.name].indexOf(where) !== -1
}
function installOne_ (target, where, context, cb) {
var nm = path.resolve(where, "node_modules")
, targetFolder = path.resolve(nm, target.name)
, prettyWhere = path.relative(process.cwd(), where)
, parent = context.parent
if (prettyWhere === ".") prettyWhere = null
if (isIncompatibleInstallOneInProgress(target, where)) {
var prettyTarget = path.relative(process.cwd(), targetFolder)
// just call back, with no error. the error will be detected in the
// final check for peer-invalid dependencies
return cb()
}
if (!(target.name in installOnesInProgress)) {
installOnesInProgress[target.name] = []
}
installOnesInProgress[target.name].push(where)
var indexOfIOIP = installOnesInProgress[target.name].length - 1
chain
( [ [checkEngine, target]
, [checkPlatform, target]
, [checkCycle, target, context.ancestors]
, [checkGit, targetFolder]
, [write, target, targetFolder, context] ]
, function (er, d) {
installOnesInProgress[target.name].splice(indexOfIOIP, 1)
if (er) return cb(er)
d.push(resultList(target, where, parent && parent._id))
cb(er, d)
}
)
}
function checkEngine (target, cb) {
var npmv = npm.version
, force = npm.config.get("force")
, nodev = force ? null : npm.config.get("node-version")
, strict = npm.config.get("engine-strict") || target.engineStrict
, eng = target.engines
if (!eng) return cb()
if (nodev && eng.node && !semver.satisfies(nodev, eng.node)
|| eng.npm && !semver.satisfies(npmv, eng.npm)) {
if (strict) {
var er = new Error("Unsupported")
er.code = "ENOTSUP"
er.required = eng
er.pkgid = target._id
return cb(er)
} else {
log.warn( "engine", "%s: wanted: %j (current: %j)"
, target._id, eng, {node: nodev, npm: npm.version} )
}
}
return cb()
}
function checkPlatform (target, cb) {
var platform = process.platform
, arch = process.arch
, osOk = true
, cpuOk = true
, force = npm.config.get("force")
if (force) {
return cb()
}
if (target.os) {
osOk = checkList(platform, target.os)
}
if (target.cpu) {
cpuOk = checkList(arch, target.cpu)
}
if (!osOk || !cpuOk) {
var er = new Error("Unsupported")
er.code = "EBADPLATFORM"
er.os = target.os || ['any']
er.cpu = target.cpu || ['any']
er.pkgid = target._id
return cb(er)
}
return cb()
}
function checkList (value, list) {
var tmp
, match = false
, blc = 0
if (typeof list === "string") {
list = [list]
}
if (list.length === 1 && list[0] === "any") {
return true
}
for (var i = 0; i < list.length; ++i) {
tmp = list[i]
if (tmp[0] === '!') {
tmp = tmp.slice(1)
if (tmp === value) {
return false
}
++blc
} else {
match = match || tmp === value
}
}
return match || blc === list.length
}
function checkCycle (target, ancestors, cb) {
// there are some very rare and pathological edge-cases where
// a cycle can cause npm to try to install a never-ending tree
// of stuff.
// Simplest:
//
// A -> B -> A' -> B' -> A -> B -> A' -> B' -> A -> ...
//
// Solution: Simply flat-out refuse to install any name@version
// that is already in the prototype tree of the ancestors object.
// A more correct, but more complex, solution would be to symlink
// the deeper thing into the new location.
// Will do that if anyone whines about this irl.
//
// Note: `npm install foo` inside of the `foo` package will abort
// earlier if `--force` is not set. However, if it IS set, then
// we need to still fail here, but just skip the first level. Of
// course, it'll still fail eventually if it's a true cycle, and
// leave things in an undefined state, but that's what is to be
// expected when `--force` is used. That is why getPrototypeOf
// is used *twice* here: to skip the first level of repetition.
var p = Object.getPrototypeOf(Object.getPrototypeOf(ancestors))
, name = target.name
, version = target.version
while (p && p !== Object.prototype && p[name] !== version) {
p = Object.getPrototypeOf(p)
}
if (p[name] !== version) return cb()
var er = new Error("Unresolvable cycle detected")
var tree = [target._id, JSON.parse(JSON.stringify(ancestors))]
, t = Object.getPrototypeOf(ancestors)
while (t && t !== Object.prototype) {
if (t === p) t.THIS_IS_P = true
tree.push(JSON.parse(JSON.stringify(t)))
t = Object.getPrototypeOf(t)
}
log.verbose("unresolvable dependency tree", tree)
er.pkgid = target._id
er.code = "ECYCLE"
return cb(er)
}
function checkGit (folder, cb) {
// if it's a git repo then don't touch it!
fs.lstat(folder, function (er, s) {
if (er || !s.isDirectory()) return cb()
else checkGit_(folder, cb)
})
}
function checkGit_ (folder, cb) {
fs.stat(path.resolve(folder, ".git"), function (er, s) {
if (!er && s.isDirectory()) {
var e = new Error("Appears to be a git repo or submodule.")
e.path = folder
e.code = "EISGIT"
return cb(e)
}
cb()
})
}
function write (target, targetFolder, context, cb_) {
var up = npm.config.get("unsafe-perm")
, user = up ? null : npm.config.get("user")
, group = up ? null : npm.config.get("group")
, family = context.family
function cb (er, data) {
// cache.unpack returns the data object, and all we care about
// is the list of installed packages from that last thing.
if (!er) return cb_(er, data)
if (false === npm.config.get("rollback")) return cb_(er)
npm.commands.unbuild([targetFolder], function (er2) {
if (er2) log.error("error rolling back", target._id, er2)
return cb_(er, data)
})
}
var bundled = []
chain
( [ [ cache.unpack, target.name, target.version, targetFolder
, null, null, user, group ]
, [ fs, "writeFile"
, path.resolve(targetFolder, "package.json")
, JSON.stringify(target, null, 2) + "\n" ]
, [ lifecycle, target, "preinstall", targetFolder ]
, function (cb) {
if (!target.bundleDependencies) return cb()
var bd = path.resolve(targetFolder, "node_modules")
fs.readdir(bd, function (er, b) {
// nothing bundled, maybe
if (er) return cb()
bundled = b || []
cb()
})
} ]
// nest the chain so that we can throw away the results returned
// up until this point, since we really don't care about it.
, function X (er) {
if (er) return cb(er)
// before continuing to installing dependencies, check for a shrinkwrap.
var opt = { dev: npm.config.get("dev") }
readDependencies(context, targetFolder, opt, function (er, data, wrap) {
var deps = prepareForInstallMany(data, "dependencies", bundled, wrap,
family)
var depsTargetFolder = targetFolder
var depsContext = { family: family
, ancestors: context.ancestors
, parent: target
, explicit: false
, wrap: wrap }
var peerDeps = prepareForInstallMany(data, "peerDependencies", bundled,
wrap, family)
var pdTargetFolder = path.resolve(targetFolder, "..", "..")
var pdContext = context
var actions =
[ [ installManyAndBuild, deps, depsTargetFolder, depsContext ] ]
if (peerDeps.length > 0) {
actions.push(
[ installMany, peerDeps, pdTargetFolder, pdContext ]
)
}
chain(actions, cb)
})
})
}
function installManyAndBuild (deps, targetFolder, context, cb) {
installMany(deps, targetFolder, context, function (er, d) {
log.verbose("about to build", targetFolder)
if (er) return cb(er)
npm.commands.build( [targetFolder]
, npm.config.get("global")
, true
, function (er) { return cb(er, d) })
})
}
function prepareForInstallMany (packageData, depsKey, bundled, wrap, family) {
var deps = Object.keys(packageData[depsKey] || {})
// don't install bundleDependencies, unless they're missing.
if (packageData.bundleDependencies) {
deps = deps.filter(function (d) {
return packageData.bundleDependencies.indexOf(d) === -1 ||
bundled.indexOf(d) === -1
})
}
return deps.filter(function (d) {
// prefer to not install things that are satisfied by
// something in the "family" list, unless we're installing
// from a shrinkwrap.
return wrap || !semver.satisfies(family[d], packageData[depsKey][d])
}).map(function (d) {
var t = packageData[depsKey][d]
, parsed = url.parse(t.replace(/^git\+/, "git"))
t = d + "@" + t
return t
})
}
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