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|
// 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 <tarball file>"
+ "\nnpm install <tarball url>"
+ "\nnpm install <folder>"
+ "\nnpm install <pkg>"
+ "\nnpm install <pkg>@<tag>"
+ "\nnpm install <pkg>@<version>"
+ "\nnpm install <pkg>@<version range>"
+ "\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 = require("./utils/npm-registry-client/index.js")
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("./utils/read-json.js")
, log = require("./utils/log.js")
, path = require("path")
, fs = require("graceful-fs")
, cache = require("./cache.js")
, asyncMap = require("slide").asyncMap
, chain = require("slide").chain
, relativize = require("./utils/relativize.js")
, output
, url = require("url")
, mkdir = require("./utils/mkdir-p.js")
, lifecycle = require("./utils/lifecycle.js")
function install (args, cb_) {
function cb (er, installed) {
if (er) return cb_(er)
output = output || require("./utils/output.js")
var tree = treeify(installed)
, pretty = prettify(tree, installed).trim()
if (pretty) output.write(pretty, afterWrite)
else afterWrite()
function afterWrite (er) {
if (er) return cb_(er)
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([where, args], "install(where, what)")
}
if (!npm.config.get("global")) {
args = args.filter(function (a) {
return path.resolve(a) !== where
})
}
mkdir(where, function (er) {
if (er) return cb(er)
// install dependencies locally by default,
// or install current folder globally
if (!args.length) {
if (npm.config.get("global")) args = ["."]
else return readDependencies( null
, where
, { dev: !npm.config.get("production") }
, function (er, data) {
if (er) return log.er(cb, "Couldn't read dependencies.")(er)
var deps = Object.keys(data.dependencies || {})
log.verbose([where, deps], "where, deps")
var context = { family: {}
, ancestors: {}
, explicit: false
, parent: data
, wrap: null }
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, cb)
})
}
// 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) 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)
})
})
}
// 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")
, opts
, function (er, data) {
if (er) return cb(er)
if (wrap) {
log.verbose([where, wrap], "readDependencies: using existing wrap")
var rv = {}
Object.keys(data).forEach(function (key) {
rv[key] = data[key]
})
rv.dependencies = {}
Object.keys(wrap).forEach(function (key) {
log.verbose([key, wrap[key]], "from wrap")
var w = wrap[key]
rv.dependencies[key] = w.from || w.version
})
log.verbose([rv.dependencies], "readDependencies: returned deps")
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(wrapfile, "using shrinkwrap file")
var rv = {}
Object.keys(data).forEach(function (key) {
rv[key] = data[key]
})
rv.dependencies = {}
Object.keys(newwrap.dependencies).forEach(function (key) {
var w = newwrap.dependencies[key]
rv.dependencies[key] = w.from || w.version
})
log.verbose([rv.dependencies], "readDependencies: returned deps")
return cb(null, rv, newwrap.dependencies)
})
})
}
// 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("global")) {
return cb(null, installed, tree, pretty)
}
// 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("dev") ? "devDependencies" : "dependencies"
deps = data[deps] = data[deps] || {}
Object.keys(things).forEach(function (t) {
deps[t] = things[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) {
// XXX This should match the data structure provided by npm ls --json
if (npm.config.get("json")) return JSON.stringify(tree, null, 2)
if (npm.config.get("parseable")) return parseable(installed)
return Object.keys(tree).map(function (p) {
p = tree[p]
var c = ""
if (p.children && p.children.length) {
pref = "\n"
var l = p.children.pop()
c = p.children.map(function (c) {
var gc = c.children && c.children.length
? " (" + c.children.map(function (gc) {
return gc.what
}).join(" ") + ")"
: ""
return "\n├── " + c.what + gc
}).join("") + "\n└── " + l.what
}
return [p.what, p.where, c].join(" ")
}).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(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) return cb(null, [])
return cb(null, [[data.name, data.version]])
})
}, function (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.
readDependencies(context, where, {}, 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(targets, "resolved")
targets.filter(function (t) { return t }).forEach(function (t) {
log.info(t._id, "into "+where)
})
asyncMap(targets, function (target, cb) {
log.info(target._id, "installOne")
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 = []
asyncMap(inst, function (pkg, cb) {
readJson(path.resolve(nm, pkg, "package.json"), function (er, d) {
if (er) return cb(null, [])
if (semver.satisfies(d.version, deps[d.name] || "*")) {
return cb(null, d.name)
}
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("skipping "+what, "already installed in "+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(what, "using existing (matches shrinkwrap)")
return cb(null, [])
}
}
if (wrap) {
name = what.split(/@/).shift()
if (wrap[name]) {
var wrapTarget = wrap[name].from || wrap[name].version
log.verbose("resolving "+what+" to "+wrapTarget, "shrinkwrap")
what = name + "@" + wrapTarget
} else {
log.verbose("skipping "+what+" (not in shrinkwrap)", "shrinkwrap")
}
} 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(what, "optional dependency failed, continuing")
return cb(null, [])
}
if (!er &&
data &&
context.family[data.name] === data.version &&
!npm.config.get("force")) {
log.info(data.name + "@" + data.version, "already installed")
return cb(null, [])
}
if (data) 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, cb)
}
function localLink (target, where, context, cb) {
log.verbose(target._id, "try to link")
var jsonFile = path.resolve( npm.dir, target.name
, "package.json" )
, parent = context.parent
readJson(jsonFile, function (er, data) {
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([er, d], "back from link")
cb(er, [resultList(target, where, parent && parent._id)])
})
}
} else {
log.verbose(target._id, "install locally (no link)")
installOne_(target, where, context, cb)
}
})
}
function resultList (target, where, parentId) {
var nm = path.resolve(where, "node_modules")
, targetFolder = path.resolve(nm, target.name)
, prettyWhere = relativize(where, process.cwd() + "/x")
if (prettyWhere === ".") prettyWhere = null
if (!npm.config.get("global")) {
// print out the folder relative to where we are right now.
// relativize isn't really made for dirs, so you need this hack
targetFolder = relativize(targetFolder, process.cwd()+"/x")
}
return [ target._id
, targetFolder
, prettyWhere && parentId
, parentId && prettyWhere
, target._from ]
}
function installOne_ (target, where, context, cb) {
var nm = path.resolve(where, "node_modules")
, targetFolder = path.resolve(nm, target.name)
, prettyWhere = relativize(where, process.cwd() + "/x")
, parent = context.parent
if (prettyWhere === ".") prettyWhere = null
chain
( [ [checkEngine, target]
, [checkCycle, target, context.ancestors]
, [checkGit, targetFolder]
, [write, target, targetFolder, context] ]
, function (er, d) {
log.verbose(target._id, "installOne cb")
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")
, eng = target.engines
if (!eng) return cb()
if (nodev && eng.node && !semver.satisfies(nodev, eng.node)
|| eng.npm && !semver.satisfies(npmv, eng.npm)) {
var er = new Error("Unsupported")
er.errno = npm.ENOTSUP
er.required = eng
er.pkgid = target._id
return cb(er)
}
return cb()
}
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.
var p = 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(tree, "unresolvable dependency tree")
er.pkgid = target._id
er.errno = npm.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.errno = npm.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)
log.error(target._id,"error installing")
if (false === npm.config.get("rollback")) return cb_(er)
npm.commands.unbuild([targetFolder], function (er2) {
if (er2) log.error(er2, "error rolling back "+target._id)
return cb_(er, data)
})
}
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 ] ]
// 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 (er) {
if (er) return cb(er)
// before continuing to installing dependencies, check for a shrinkwrap.
readDependencies(context, targetFolder, {}, function (er, data, wrap) {
var deps = Object.keys(data.dependencies || {})
// don't install bundleDependencies
if (data.bundleDependencies) {
deps = deps.filter(function (d) {
return data.bundleDependencies.indexOf(d) === -1
})
}
var newcontext = { family: family
, ancestors: context.ancestors
, parent: target
, explicit: false
, wrap: wrap }
installMany(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], data.dependencies[d])
}).map(function (d) {
var t = data.dependencies[d]
, parsed = url.parse(t.replace(/^git\+/, "git"))
t = d + "@" + t
return t
}), targetFolder, newcontext, function (er, d) {
log.verbose(targetFolder, "about to build")
if (er) return cb(er)
npm.commands.build( [targetFolder]
, npm.config.get("global")
, true
, function (er) { return cb(er, d) })
})
})
})
}
|