Globs starting with ** fail if the current path and the matched-with path have nothing in common

[rrousselGit]

Consider:

Glob('**.dart');

If you are within:

/private/var/folders/68/t6gjyz1j7t5gzhvzbzwczpr80000gn/T/8kbZAb

and check against:

/Users/remirousselet/dev/whatever.dart

then glob.matches returns false.

This seems to be because:

• The ** ast returns canMatchAbsolute => false
• This causes Glob.matchAsPrefix to merge the current and tested paths, in this case:

  ../../../../../../../Users/remirousselet/dev/whatever.dart
  

• the ** ast doesn't matches against ../ paths as per _toRegExp's comment:

  // Double star shouldn't match paths with a leading "../", since these paths
  // wouldn't be listed with this glob. We only check for "../" at the
  // beginning since the paths are normalized before being checked against the
  // glob.
  

[rrousselGit]

Here's a regression test :)

test('absolute path fully dissociate from current path', () {
  expect(
    '/foo/bar/file.dart',
    contains(
      Glob('**.dart', context: p.Context(current: '/baz/quaz')),
    ),
  );
});

I'm currently investigating if there's an easy fix.