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usr
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lib
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node_modules
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npm
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node_modules
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cacache
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lib
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util
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Filename :
move-file.js
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'use strict' const fs = require('graceful-fs') const BB = require('bluebird') const chmod = BB.promisify(fs.chmod) const unlink = BB.promisify(fs.unlink) let move let pinflight module.exports = moveFile function moveFile (src, dest) { // This isn't quite an fs.rename -- the assumption is that // if `dest` already exists, and we get certain errors while // trying to move it, we should just not bother. // // In the case of cache corruption, users will receive an // EINTEGRITY error elsewhere, and can remove the offending // content their own way. // // Note that, as the name suggests, this strictly only supports file moves. return BB.fromNode(cb => { fs.link(src, dest, err => { if (err) { if (err.code === 'EEXIST' || err.code === 'EBUSY') { // file already exists, so whatever } else if (err.code === 'EPERM' && process.platform === 'win32') { // file handle stayed open even past graceful-fs limits } else { return cb(err) } } return cb() }) }).then(() => { // content should never change for any reason, so make it read-only return BB.join(unlink(src), process.platform !== 'win32' && chmod(dest, '0444')) }).catch(() => { if (!pinflight) { pinflight = require('promise-inflight') } return pinflight('cacache-move-file:' + dest, () => { return BB.promisify(fs.stat)(dest).catch(err => { if (err.code !== 'ENOENT') { // Something else is wrong here. Bail bail bail throw err } // file doesn't already exist! let's try a rename -> copy fallback if (!move) { move = require('move-concurrently') } return move(src, dest, { BB, fs }) }) }) }) }