diff options
Diffstat (limited to 'deps/npm/node_modules/npm-profile/node_modules/cacache/lib/util/move-file.js')
-rw-r--r-- | deps/npm/node_modules/npm-profile/node_modules/cacache/lib/util/move-file.js | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/deps/npm/node_modules/npm-profile/node_modules/cacache/lib/util/move-file.js b/deps/npm/node_modules/npm-profile/node_modules/cacache/lib/util/move-file.js new file mode 100644 index 0000000000..b43744b3da --- /dev/null +++ b/deps/npm/node_modules/npm-profile/node_modules/cacache/lib/util/move-file.js @@ -0,0 +1,51 @@ +'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 }) + }) + }) + }) +} |