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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("./utils/log.js")
, asyncMap = require("slide").asyncMap
, chain = require("slide").chain
, path = require("path")
, relativize = require("./utils/relativize.js")
, rm = require("rimraf")
, output = require("./utils/output.js")
, build = require("./build.js")
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.charAt(0) !== "."
}))
})
}
function link (args, cb) {
if (process.platform === "win32") {
var e = new Error("npm link not supported on windows")
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) {
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] })
pp = d[0][1]
pkg = path.basename(pp)
target = path.resolve(npm.dir, pkg)
next()
}
var t = path.resolve(npm.globalDir, "..")
, pp = path.resolve(npm.globalDir, pkg)
, rp = null
, target = path.resolve(npm.dir, pkg)
// if it's a folder or a random not-installed thing, then
// link or install it first
if (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(pkg, "invalid symbolic link")
else rp = real
next()
})
}
})
function next () {
chain
( [ [npm.commands, "unbuild", [target]]
, [log.verbose, "symlinking " + pp + " to "+target, "link"]
, [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("./utils/read-json.js")
readJson( path.resolve(me, "package.json")
, { dev: true }
, function (er, d) {
function cb (er) {
return cb_(er, [[d && d._id, target, null, null]])
}
if (er) 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(target, "link: build target")
// also install missing dependencies.
npm.commands.install(me, [], function (er, installed) {
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 = relativize(dest, path.resolve(process.cwd(),"x"))
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
output.write(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.
output.write(dest + "::" + rp, cb)
}