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// link with no args: symlink the folder to the global location
// link with package arg: symlink the global to the local
var npm = require("./npm.js")
, symlink = require("./utils/link.js")
, fs = require("graceful-fs")
, log = require("npmlog")
, asyncMap = require("slide").asyncMap
, chain = require("slide").chain
, path = require("path")
, rm = require("./utils/gently-rm.js")
, build = require("./build.js")
, npa = require("npm-package-arg")
module.exports = link
link.usage = "npm link (in package dir)"
+ "\nnpm link <pkg> (link global into local)"
link.completion = function (opts, cb) {
var dir = npm.globalDir
fs.readdir(dir, function (er, files) {
cb(er, files.filter(function (f) {
return !f.match(/^[\._-]/)
}))
})
}
function link (args, cb) {
if (process.platform === "win32") {
var semver = require("semver")
if (!semver.satisfies(process.version, ">=0.7.9")) {
var msg = "npm link not supported on windows prior to node 0.7.9"
, e = new Error(msg)
e.code = "ENOTSUP"
e.errno = require("constants").ENOTSUP
return cb(e)
}
}
if (npm.config.get("global")) {
return cb(new Error("link should never be --global.\n"
+"Please re-run this command with --local"))
}
if (args.length === 1 && args[0] === ".") args = []
if (args.length) return linkInstall(args, cb)
linkPkg(npm.prefix, cb)
}
function linkInstall (pkgs, cb) {
asyncMap(pkgs, function (pkg, cb) {
var t = path.resolve(npm.globalDir, "..")
, pp = path.resolve(npm.globalDir, pkg)
, rp = null
, target = path.resolve(npm.dir, pkg)
function n (er, data) {
if (er) return cb(er, data)
// install returns [ [folder, pkgId], ... ]
// but we definitely installed just one thing.
var d = data.filter(function (d) { return !d[3] })
var what = npa(d[0][0])
pp = d[0][1]
pkg = what.name
target = path.resolve(npm.dir, pkg)
next()
}
// if it's a folder, a random not-installed thing, or not a scoped package,
// then link or install it first
if (pkg[0] !== "@" && (pkg.indexOf("/") !== -1 || pkg.indexOf("\\") !== -1)) {
return fs.lstat(path.resolve(pkg), function (er, st) {
if (er || !st.isDirectory()) {
npm.commands.install(t, pkg, n)
} else {
rp = path.resolve(pkg)
linkPkg(rp, n)
}
})
}
fs.lstat(pp, function (er, st) {
if (er) {
rp = pp
return npm.commands.install(t, pkg, n)
} else if (!st.isSymbolicLink()) {
rp = pp
next()
} else {
return fs.realpath(pp, function (er, real) {
if (er) log.warn("invalid symbolic link", pkg)
else rp = real
next()
})
}
})
function next () {
chain
( [ [npm.commands, "unbuild", [target]]
, [function (cb) {
log.verbose("link", "symlinking %s to %s", pp, target)
cb()
}]
, [symlink, pp, target]
// do run lifecycle scripts - full build here.
, rp && [build, [target]]
, [ resultPrinter, pkg, pp, target, rp ] ]
, cb )
}
}, cb)
}
function linkPkg (folder, cb_) {
var me = folder || npm.prefix
, readJson = require("read-package-json")
log.verbose("linkPkg", folder)
readJson(path.resolve(me, "package.json"), function (er, d) {
function cb (er) {
return cb_(er, [[d && d._id, target, null, null]])
}
if (er) return cb(er)
if (!d.name) {
er = new Error("Package must have a name field to be linked")
return cb(er)
}
var target = path.resolve(npm.globalDir, d.name)
rm(target, function (er) {
if (er) return cb(er)
symlink(me, target, function (er) {
if (er) return cb(er)
log.verbose("link", "build target", target)
// also install missing dependencies.
npm.commands.install(me, [], function (er) {
if (er) return cb(er)
// build the global stuff. Don't run *any* scripts, because
// install command already will have done that.
build([target], true, build._noLC, true, function (er) {
if (er) return cb(er)
resultPrinter(path.basename(me), me, target, cb)
})
})
})
})
})
}
function resultPrinter (pkg, src, dest, rp, cb) {
if (typeof cb !== "function") cb = rp, rp = null
var where = dest
rp = (rp || "").trim()
src = (src || "").trim()
// XXX If --json is set, then look up the data from the package.json
if (npm.config.get("parseable")) {
return parseableOutput(dest, rp || src, cb)
}
if (rp === src) rp = null
console.log(where + " -> " + src + (rp ? " -> " + rp: ""))
cb()
}
function parseableOutput (dest, rp, cb) {
// XXX this should match ls --parseable and install --parseable
// look up the data from package.json, format it the same way.
//
// link is always effectively "long", since it doesn't help much to
// *just* print the target folder.
// However, we don't actually ever read the version number, so
// the second field is always blank.
console.log(dest + "::" + rp)
cb()
}
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