1// unix absolute paths are also absolute on win32, so we use this for both
2const { isAbsolute, parse } = require('path').win32
3
4// returns [root, stripped]
5// Note that windows will think that //x/y/z/a has a "root" of //x/y, and in
6// those cases, we want to sanitize it to x/y/z/a, not z/a, so we strip /
7// explicitly if it's the first character.
8// drive-specific relative paths on Windows get their root stripped off even
9// though they are not absolute, so `c:../foo` becomes ['c:', '../foo']
10module.exports = path => {
11  let r = ''
12
13  let parsed = parse(path)
14  while (isAbsolute(path) || parsed.root) {
15    // windows will think that //x/y/z has a "root" of //x/y/
16    // but strip the //?/C:/ off of //?/C:/path
17    const root = path.charAt(0) === '/' && path.slice(0, 4) !== '//?/' ? '/'
18      : parsed.root
19    path = path.slice(root.length)
20    r += root
21    parsed = parse(path)
22  }
23  return [r, path]
24}
25