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'use strict'
const path = require('path')
const fs = require('graceful-fs')
const BB = require('bluebird')
const linkIfExists = BB.promisify(require('gentle-fs').linkIfExists)
const cmdShimIfExists = BB.promisify(require('cmd-shim').ifExists)
const open = BB.promisify(fs.open)
const close = BB.promisify(fs.close)
const read = BB.promisify(fs.read, {multiArgs: true})
const chmod = BB.promisify(fs.chmod)
const readFile = BB.promisify(fs.readFile)
const writeFileAtomic = BB.promisify(require('write-file-atomic'))
module.exports = BB.promisify(binLinks)
function binLinks (pkg, folder, global, opts, cb) {
// if it's global, and folder is in {prefix}/node_modules,
// then bins are in {prefix}/bin
// otherwise, then bins are in folder/../.bin
var parent = pkg.name && pkg.name[0] === '@' ? path.dirname(path.dirname(folder)) : path.dirname(folder)
var gnm = global && opts.globalDir
var gtop = parent === gnm
opts.log.info('linkStuff', opts.pkgId)
opts.log.silly('linkStuff', opts.pkgId, 'has', parent, 'as its parent node_modules')
if (global) opts.log.silly('linkStuff', opts.pkgId, 'is part of a global install')
if (gnm) opts.log.silly('linkStuff', opts.pkgId, 'is installed into a global node_modules')
if (gtop) opts.log.silly('linkStuff', opts.pkgId, 'is installed into the top-level global node_modules')
return BB.join(
linkBins(pkg, folder, parent, gtop, opts),
linkMans(pkg, folder, parent, gtop, opts)
).asCallback(cb)
}
function isHashbangFile (file) {
return open(file, 'r').then(fileHandle => {
return read(fileHandle, Buffer.alloc(2), 0, 2, 0).spread((_, buf) => {
if (!hasHashbang(buf)) return []
return read(fileHandle, Buffer.alloc(2048), 0, 2048, 0)
}).spread((_, buf) => buf && hasCR(buf), () => false)
.finally(() => close(fileHandle))
}).catch(() => false)
}
function hasHashbang (buf) {
const str = buf.toString()
return str.slice(0, 2) === '#!'
}
function hasCR (buf) {
return /^#![^\n]+\r\n/.test(buf)
}
function dos2Unix (file) {
return readFile(file, 'utf8').then(content => {
return writeFileAtomic(file, content.replace(/^(#![^\n]+)\r\n/, '$1\n'))
})
}
function getLinkOpts (opts, gently) {
return Object.assign({}, opts, { gently: gently })
}
function linkBins (pkg, folder, parent, gtop, opts) {
if (!pkg.bin || (!gtop && path.basename(parent) !== 'node_modules')) {
return
}
var linkOpts = getLinkOpts(opts, gtop && folder)
var execMode = parseInt('0777', 8) & (~opts.umask)
var binRoot = gtop ? opts.globalBin
: path.resolve(parent, '.bin')
opts.log.verbose('linkBins', [pkg.bin, binRoot, gtop])
return BB.map(Object.keys(pkg.bin), bin => {
var dest = path.resolve(binRoot, bin)
var src = path.resolve(folder, pkg.bin[bin])
return linkBin(src, dest, linkOpts).then(() => {
// bins should always be executable.
// XXX skip chmod on windows?
return chmod(src, execMode)
}).then(() => {
return isHashbangFile(src)
}).then(isHashbang => {
if (!isHashbang) return
opts.log.silly('linkBins', 'Converting line endings of hashbang file:', src)
return dos2Unix(src)
}).then(() => {
if (!gtop) return
var dest = path.resolve(binRoot, bin)
var out = opts.parseable
? dest + '::' + src + ':BINFILE'
: dest + ' -> ' + src
if (!opts.json && !opts.parseable) {
opts.log.clearProgress()
console.log(out)
opts.log.showProgress()
}
}).catch(err => {
if (err.code === 'ENOENT' && opts.ignoreScripts) return
throw err
})
})
}
function linkBin (from, to, opts) {
if (process.platform !== 'win32') {
return linkIfExists(from, to, opts)
} else {
return cmdShimIfExists(from, to)
}
}
function linkMans (pkg, folder, parent, gtop, opts) {
if (!pkg.man || !gtop || process.platform === 'win32') return
var manRoot = path.resolve(opts.prefix, 'share', 'man')
opts.log.verbose('linkMans', 'man files are', pkg.man, 'in', manRoot)
// make sure that the mans are unique.
// otherwise, if there are dupes, it'll fail with EEXIST
var set = pkg.man.reduce(function (acc, man) {
acc[path.basename(man)] = man
return acc
}, {})
var manpages = pkg.man.filter(function (man) {
return set[path.basename(man)] === man
})
return BB.map(manpages, man => {
if (typeof man !== 'string') return
opts.log.silly('linkMans', 'preparing to link', man)
var parseMan = man.match(/(.*\.([0-9]+)(\.gz)?)$/)
if (!parseMan) {
throw new Error(
man + ' is not a valid name for a man file. ' +
'Man files must end with a number, ' +
'and optionally a .gz suffix if they are compressed.'
)
}
var stem = parseMan[1]
var sxn = parseMan[2]
var bn = path.basename(stem)
var manSrc = path.resolve(folder, man)
var manDest = path.join(manRoot, 'man' + sxn, bn)
return linkIfExists(manSrc, manDest, getLinkOpts(opts, gtop && folder))
})
}
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