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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')
var symlink = require('./utils/link.js')
var fs = require('graceful-fs')
var log = require('npmlog')
var asyncMap = require('slide').asyncMap
var chain = require('slide').chain
var path = require('path')
var build = require('./build.js')
var npa = require('npm-package-arg')
var usage = require('./utils/usage')
var output = require('./utils/output.js')
module.exports = link
link.usage = usage(
'link',
'npm link (in package dir)' +
'\nnpm link [<@scope>/]<pkg>[@<version>]'
)
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.gte(process.version, '0.7.9')) {
var msg = 'npm link not supported on windows prior to node 0.7.9'
var e = new Error(msg)
e.code = 'ENOTSUP'
e.errno = require('constants').ENOTSUP // eslint-disable-line node/no-deprecated-api
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 parentFolder (id, folder) {
if (id[0] === '@') {
return path.resolve(folder, '..', '..')
} else {
return path.resolve(folder, '..')
}
}
function linkInstall (pkgs, cb) {
asyncMap(pkgs, function (pkg, cb) {
var t = path.resolve(npm.globalDir, '..')
var pp = path.resolve(npm.globalDir, pkg)
var rp = null
var target = path.resolve(npm.dir, pkg)
function n (er, data) {
if (er) return cb(er, data)
// we want the ONE thing that was installed into the global dir
var installed = data.filter(function (info) {
var id = info[0]
var folder = info[1]
return parentFolder(id, folder) === npm.globalDir
})
var id = installed[0][0]
pp = installed[0][1]
var what = npa(id)
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 () {
if (npm.config.get('dry-run')) return resultPrinter(pkg, pp, target, rp, cb)
chain(
[
[ function (cb) {
log.verbose('link', 'symlinking %s to %s', pp, target)
cb()
} ],
[symlink, pp, target, false, false],
// do not run any scripts
rp && [build, [target], npm.config.get('global'), build._noLC, true],
[resultPrinter, pkg, pp, target, rp]
],
cb
)
}
}, cb)
}
function linkPkg (folder, cb_) {
var me = folder || npm.prefix
var 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)
if (npm.config.get('dry-run')) return resultPrinter(path.basename(me), me, target, cb)
symlink(me, target, false, true, 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
output(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(dest + '::' + rp)
cb()
}
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