documentit/node_modules/fs-extra/lib/ensure/link.js
2018-01-05 10:48:13 -08:00

59 lines
1.4 KiB
JavaScript

var path = require('path')
var fs = require('graceful-fs')
var mkdir = require('../mkdirs')
function createLink (srcpath, dstpath, callback) {
function makeLink (srcpath, dstpath) {
fs.link(srcpath, dstpath, function (err) {
if (err) return callback(err)
callback(null)
})
}
fs.exists(dstpath, function (destinationExists) {
if (destinationExists) return callback(null)
fs.lstat(srcpath, function (err, stat) {
if (err) {
err.message = err.message.replace('lstat', 'ensureLink')
return callback(err)
}
var dir = path.dirname(dstpath)
fs.exists(dir, function (dirExists) {
if (dirExists) return makeLink(srcpath, dstpath)
mkdir.mkdirs(dir, function (err) {
if (err) return callback(err)
makeLink(srcpath, dstpath)
})
})
})
})
}
function createLinkSync (srcpath, dstpath, callback) {
var destinationExists = fs.existsSync(dstpath)
if (destinationExists) return undefined
try {
fs.lstatSync(srcpath)
} catch (err) {
err.message = err.message.replace('lstat', 'ensureLink')
throw err
}
var dir = path.dirname(dstpath)
var dirExists = fs.existsSync(dir)
if (dirExists) return fs.linkSync(srcpath, dstpath)
mkdir.mkdirsSync(dir)
return fs.linkSync(srcpath, dstpath)
}
module.exports = {
createLink: createLink,
createLinkSync: createLinkSync,
// alias
ensureLink: createLink,
ensureLinkSync: createLinkSync
}