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files >> //lib/node_modules/npm/node_modules/bin-links/index.js
'use strict' const path = require('path') const fs = require('graceful-fs') const BB = require('bluebird') const gentleFs = require('gentle-fs') const linkIfExists = BB.promisify(gentleFs.linkIfExists) const gentleFsBinLink = BB.promisify(gentleFs.binLink) 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')) const normalize = require('npm-normalize-package-bin') module.exports = BB.promisify(binLinks) function binLinks (pkg, folder, global, opts, cb) { pkg = normalize(pkg) folder = path.resolve(folder) // 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), /* istanbul ignore next */ () => false) .finally(() => close(fileHandle)) }).catch(/* istanbul ignore next */ () => 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]) /* istanbul ignore if - that unpossible */ if (src.indexOf(folder) !== 0) { throw new Error('invalid bin entry for package ' + pkg._id + '. key=' + bin + ', value=' + 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 => { /* istanbul ignore next */ if (err.code === 'ENOENT' && opts.ignoreScripts) return throw err }) }) } function linkBin (from, to, opts) { // do not clobber global bins if (opts.globalBin && to.indexOf(opts.globalBin) === 0) { opts.clobberLinkGently = true } return gentleFsBinLink(from, to, opts) } 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) { if (typeof man !== 'string') { return acc } const cleanMan = path.join('/', man).replace(/\\|:/g, '/').substr(1) acc[path.basename(man)] = cleanMan return acc }, {}) var manpages = pkg.man.filter(function (man) { if (typeof man !== 'string') { return false } const cleanMan = path.join('/', man).replace(/\\|:/g, '/').substr(1) return set[path.basename(man)] === cleanMan }) return BB.map(manpages, man => { 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) /* istanbul ignore if - that unpossible */ if (manSrc.indexOf(folder) !== 0) { throw new Error('invalid man entry for package ' + pkg._id + '. man=' + manSrc) } var manDest = path.join(manRoot, 'man' + sxn, bn) // man pages should always be clobbering gently, because they are // only installed for top-level global packages, so never destroy // a link if it doesn't point into the folder we're linking opts.clobberLinkGently = true return linkIfExists(manSrc, manDest, getLinkOpts(opts, gtop && folder)) }) }
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