78 lines
2.9 KiB
Nix
78 lines
2.9 KiB
Nix
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{ lib }:
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with lib;
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with builtins;
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rec {
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# Regular expression to match URIs per RFC3986
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# From: # http://jmrware.com/articles/2009/uri_regexp/URI_regex.html#uri-40
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native-regex = ''
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# RFC-3986 URI component: URI
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[A-Za-z][A-Za-z0-9+\-.]* : # scheme ":"
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(?: // # hier-part
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(?: (?:[A-Za-z0-9\-._~!$&'()*+,;=:]|%[0-9A-Fa-f]{2})* @)?
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(?:
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\[
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(?:
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(?:
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(?: (?:[0-9A-Fa-f]{1,4}:){6}
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| :: (?:[0-9A-Fa-f]{1,4}:){5}
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| (?: [0-9A-Fa-f]{1,4})? :: (?:[0-9A-Fa-f]{1,4}:){4}
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| (?: (?:[0-9A-Fa-f]{1,4}:){0,1} [0-9A-Fa-f]{1,4})? :: (?:[0-9A-Fa-f]{1,4}:){3}
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| (?: (?:[0-9A-Fa-f]{1,4}:){0,2} [0-9A-Fa-f]{1,4})? :: (?:[0-9A-Fa-f]{1,4}:){2}
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| (?: (?:[0-9A-Fa-f]{1,4}:){0,3} [0-9A-Fa-f]{1,4})? :: [0-9A-Fa-f]{1,4}:
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| (?: (?:[0-9A-Fa-f]{1,4}:){0,4} [0-9A-Fa-f]{1,4})? ::
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) (?:
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[0-9A-Fa-f]{1,4} : [0-9A-Fa-f]{1,4}
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| (?: (?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?) \.){3}
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(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)
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)
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| (?: (?:[0-9A-Fa-f]{1,4}:){0,5} [0-9A-Fa-f]{1,4})? :: [0-9A-Fa-f]{1,4}
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| (?: (?:[0-9A-Fa-f]{1,4}:){0,6} [0-9A-Fa-f]{1,4})? ::
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)
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| [Vv][0-9A-Fa-f]+\.[A-Za-z0-9\-._~!$&'()*+,;=:]+
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)
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\]
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| (?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}
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(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)
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| (?:[A-Za-z0-9\-._~!$&'()*+,;=]|%[0-9A-Fa-f]{2})*
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)
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(?: : [0-9]* )?
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(?:/ (?:[A-Za-z0-9\-._~!$&'()*+,;=:@]|%[0-9A-Fa-f]{2})* )*
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| /
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(?: (?:[A-Za-z0-9\-._~!$&'()*+,;=:@]|%[0-9A-Fa-f]{2})+
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(?:/ (?:[A-Za-z0-9\-._~!$&'()*+,;=:@]|%[0-9A-Fa-f]{2})* )*
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)?
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| (?:[A-Za-z0-9\-._~!$&'()*+,;=:@]|%[0-9A-Fa-f]{2})+
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(?:/ (?:[A-Za-z0-9\-._~!$&'()*+,;=:@]|%[0-9A-Fa-f]{2})* )*
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)
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(?:\? (?:[A-Za-z0-9\-._~!$&'()*+,;=:@/?]|%[0-9A-Fa-f]{2})* )? # [ "?" query ]
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(?:\# (?:[A-Za-z0-9\-._~!$&'()*+,;=:@/?]|%[0-9A-Fa-f]{2})* )? # [ "#" fragment ]
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'';
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posix-extended-regex =
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let
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removeComment = s:
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elemAt (match "^((\\\\#|[^#])*)(#.*)?$" s) 0;
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removeWhitespace =
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replaceStrings [" "] [""];
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moveDashToEndOfCharacterClass = s:
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let
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result = match "(.*)\\\\-([^]]+)(].*)" s;
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s' = elemAt result 0 + elemAt result 1 + "-" + elemAt result 2;
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in
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if result != null then
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moveDashToEndOfCharacterClass s'
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else
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s;
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in
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concatStrings
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(foldl' (a: f: map f a) (splitString "\n" native-regex) [
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removeComment
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moveDashToEndOfCharacterClass
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(replaceStrings ["(?:"] ["("])
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removeWhitespace
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]);
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}
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