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'use strict'
const u = require('universalify').fromCallback
const path = require('path')
const fs = require('graceful-fs')
const mkdir = require('../mkdirs')
const pathExists = require('../path-exists').pathExists
const { areIdentical } = require('../util/stat')
function createLink (srcpath, dstpath, callback) {
function makeLink (srcpath, dstpath) {
fs.link(srcpath, dstpath, err => {
if (err) return callback(err)
callback(null)
})
}
fs.lstat(dstpath, (_, dstStat) => {
fs.lstat(srcpath, (err, srcStat) => {
if (err) {
err.message = err.message.replace('lstat', 'ensureLink')
return callback(err)
}
if (dstStat && areIdentical(srcStat, dstStat)) return callback(null)
const dir = path.dirname(dstpath)
pathExists(dir, (err, dirExists) => {
if (err) return callback(err)
if (dirExists) return makeLink(srcpath, dstpath)
mkdir.mkdirs(dir, err => {
if (err) return callback(err)
makeLink(srcpath, dstpath)
})
})
})
})
}
function createLinkSync (srcpath, dstpath) {
let dstStat
try {
dstStat = fs.lstatSync(dstpath)
} catch {}
try {
const srcStat = fs.lstatSync(srcpath)
if (dstStat && areIdentical(srcStat, dstStat)) return
} catch (err) {
err.message = err.message.replace('lstat', 'ensureLink')
throw err
}
const dir = path.dirname(dstpath)
const dirExists = fs.existsSync(dir)
if (dirExists) return fs.linkSync(srcpath, dstpath)
mkdir.mkdirsSync(dir)
return fs.linkSync(srcpath, dstpath)
}
module.exports = {
createLink: u(createLink),
createLinkSync
}