mirror of
https://github.com/idanoo/GoScrobble.git
synced 2024-11-24 17:35:16 +00:00
68 lines
2.3 KiB
JavaScript
68 lines
2.3 KiB
JavaScript
|
'use strict'
|
||
|
|
|
||
|
|
const fs = require('fs')
|
||
|
|
const util = require('util')
|
||
|
|
const chmod = util.promisify(fs.chmod)
|
||
|
|
const unlink = util.promisify(fs.unlink)
|
||
|
|
const stat = util.promisify(fs.stat)
|
||
|
|
const move = require('@npmcli/move-file')
|
||
|
|
const pinflight = require('promise-inflight')
|
||
|
|
|
||
|
|
module.exports = moveFile
|
||
|
|
|
||
|
|
function moveFile (src, dest) {
|
||
|
|
const isWindows = global.__CACACHE_TEST_FAKE_WINDOWS__ ||
|
||
|
|
process.platform === 'win32'
|
||
|
|
|
||
|
|
// 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 new Promise((resolve, reject) => {
|
||
|
|
fs.link(src, dest, (err) => {
|
||
|
|
if (err) {
|
||
|
|
if (isWindows && err.code === 'EPERM') {
|
||
|
|
// XXX This is a really weird way to handle this situation, as it
|
||
|
|
// results in the src file being deleted even though the dest
|
||
|
|
// might not exist. Since we pretty much always write files to
|
||
|
|
// deterministic locations based on content hash, this is likely
|
||
|
|
// ok (or at worst, just ends in a future cache miss). But it would
|
||
|
|
// be worth investigating at some time in the future if this is
|
||
|
|
// really what we want to do here.
|
||
|
|
return resolve()
|
||
|
|
} else if (err.code === 'EEXIST' || err.code === 'EBUSY') {
|
||
|
|
// file already exists, so whatever
|
||
|
|
return resolve()
|
||
|
|
} else
|
||
|
|
return reject(err)
|
||
|
|
} else
|
||
|
|
return resolve()
|
||
|
|
})
|
||
|
|
})
|
||
|
|
.then(() => {
|
||
|
|
// content should never change for any reason, so make it read-only
|
||
|
|
return Promise.all([
|
||
|
|
unlink(src),
|
||
|
|
!isWindows && chmod(dest, '0444'),
|
||
|
|
])
|
||
|
|
})
|
||
|
|
.catch(() => {
|
||
|
|
return pinflight('cacache-move-file:' + dest, () => {
|
||
|
|
return 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
|
||
|
|
// only delete if it successfully copies
|
||
|
|
return move(src, dest)
|
||
|
|
})
|
||
|
|
})
|
||
|
|
})
|
||
|
|
}
|