39 lines
1.0 KiB
Nix
39 lines
1.0 KiB
Nix
{ lib, ... }:
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with lib;
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rec {
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# POSIX.1‐2013, 3.2 Absolute Pathname
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absolute-pathname = mkOptionType {
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name = "POSIX absolute pathname";
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check = x: isString x && substring 0 1 x == "/" && pathname.check x;
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merge = mergeOneOption;
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};
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file-mode = mkOptionType {
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name = "file mode";
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check = test "[0-7]{4}";
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merge = mergeOneOption;
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};
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# POSIX.1‐2013, 3.278 Portable Filename Character Set
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filename = mkOptionType {
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name = "POSIX filename";
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check = test "([0-9A-Za-z._])[0-9A-Za-z._-]*";
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merge = mergeOneOption;
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};
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# POSIX.1‐2013, 3.267 Pathname
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pathname = mkOptionType {
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name = "POSIX pathname";
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check = x:
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let
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# The filter is used to normalize paths, i.e. to remove duplicated and
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# trailing slashes. It also removes leading slashes, thus we have to
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# check for "/" explicitly below.
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xs = filter (s: stringLength s > 0) (splitString "/" x);
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in
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isString x && (x == "/" || (length xs > 0 && all filename.check xs));
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merge = mergeOneOption;
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};
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}
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