aboutsummaryrefslogtreecommitdiffstats
path: root/lib/types.nix
blob: 572964a8efa756dfee54cef90b0d18d344d6bb09 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
{ lib, ... }:
with lib;
rec {
  # POSIX.1‐2013, 3.2 Absolute Pathname
  absolute-pathname = mkOptionType {
    name = "POSIX absolute pathname";
    check = x: isString x && substring 0 1 x == "/" && pathname.check x;
    merge = mergeOneOption;
  };

  file-mode = mkOptionType {
    name = "file mode";
    check = test "[0-7]{4}";
    merge = mergeOneOption;
  };

  # POSIX.1‐2013, 3.278 Portable Filename Character Set
  filename = mkOptionType {
    name = "POSIX filename";
    check = test "([0-9A-Za-z._])[0-9A-Za-z._-]*";
    merge = mergeOneOption;
  };

  # POSIX.1‐2013, 3.267 Pathname
  pathname = mkOptionType {
    name = "POSIX pathname";
    check = x:
      let
        # The filter is used to normalize paths, i.e. to remove duplicated and
        # trailing slashes.  It also removes leading slashes, thus we have to
        # check for "/" explicitly below.
        xs = filter (s: stringLength s > 0) (splitString "/" x);
      in
        isString x && (x == "/" || (length xs > 0 && all filename.check xs));
    merge = mergeOneOption;
  };

}