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+# -*- coding: utf-8 -*-
+"""
+ pygments.lexers.nix
+ ~~~~~~~~~~~~~~~~~~~
+
+ Lexers for the NixOS Nix language.
+
+ :copyright: Copyright 2006-2014 by the Pygments team, see AUTHORS.
+ :license: BSD, see LICENSE for details.
+"""
+
+import re
+
+from pygments.lexer import RegexLexer, include
+from pygments.token import Text, Comment, Operator, Keyword, Name, String, \
+ Number, Punctuation, Literal
+
+__all__ = ['NixLexer']
+
+
+class NixLexer(RegexLexer):
+ """
+ For the `Nix language <http://nixos.org/nix/>`_.
+
+ .. versionadded:: 2.0
+ """
+
+ name = 'Nix'
+ aliases = ['nixos', 'nix']
+ filenames = ['*.nix']
+ mimetypes = ['text/x-nix']
+
+ flags = re.MULTILINE | re.UNICODE
+
+ keywords = ['rec', 'with', 'let', 'in', 'inherit', 'assert', 'if',
+ 'else', 'then', '...']
+ builtins = ['import', 'abort', 'baseNameOf', 'dirOf', 'isNull', 'builtins',
+ 'map', 'removeAttrs', 'throw', 'toString', 'derivation']
+ operators = ['++', '+', '?', '.', '!', '//', '==',
+ '!=', '&&', '||', '->', '=']
+
+ punctuations = ["(", ")", "[", "]", ";", "{", "}", ":", ",", "@"]
+
+ tokens = {
+ 'root': [
+ # comments starting with #
+ (r'#.*$', Comment.Single),
+
+ # multiline comments
+ (r'/\*', Comment.Multiline, 'comment'),
+
+ # whitespace
+ (r'\s+', Text),
+
+ # keywords
+ ('(%s)' % '|'.join(re.escape(entry) + '\\b' for entry in keywords), Keyword),
+
+ # highlight the builtins
+ ('(%s)' % '|'.join(re.escape(entry) + '\\b' for entry in builtins),
+ Name.Builtin),
+
+ (r'\b(true|false|null)\b', Name.Constant),
+
+ # operators
+ ('(%s)' % '|'.join(re.escape(entry) for entry in operators),
+ Operator),
+
+ # word operators
+ (r'\b(or|and)\b', Operator.Word),
+
+ # punctuations
+ ('(%s)' % '|'.join(re.escape(entry) for entry in punctuations), Punctuation),
+
+ # integers
+ (r'[0-9]+', Number.Integer),
+
+ # strings
+ (r'"', String.Double, 'doublequote'),
+ (r"''", String.Single, 'singlequote'),
+
+ # paths
+ (r'[\w.+-]*(\/[\w.+-]+)+', Literal),
+ (r'\<[\w.+-]+(\/[\w.+-]+)*\>', Literal),
+
+ # urls
+ (r'[a-zA-Z][a-zA-Z0-9\+\-\.]*\:[\w%/?:@&=+$,\\.!~*\'-]+', Literal),
+
+ # names of variables
+ (r'[\w-]+\s*=', String.Symbol),
+ (r'[a-zA-Z_][\w\'-]*', Text),
+
+ ],
+ 'comment': [
+ (r'[^/\*]+', Comment.Multiline),
+ (r'/\*', Comment.Multiline, '#push'),
+ (r'\*/', Comment.Multiline, '#pop'),
+ (r'[\*/]', Comment.Multiline),
+ ],
+ 'singlequote': [
+ (r"'''", String.Escape),
+ (r"''\$\{", String.Escape),
+ (r"''\n", String.Escape),
+ (r"''\r", String.Escape),
+ (r"''\t", String.Escape),
+ (r"''", String.Single, '#pop'),
+ (r'\$\{', String.Interpol, 'antiquote'),
+ (r"[^']", String.Single),
+ ],
+ 'doublequote': [
+ (r'\\', String.Escape),
+ (r'\\"', String.Escape),
+ (r'\\${', String.Escape),
+ (r'"', String.Double, '#pop'),
+ (r'\$\{', String.Interpol, 'antiquote'),
+ (r'[^"]', String.Double),
+ ],
+ 'antiquote': [
+ (r"}", String.Interpol, '#pop'),
+ # TODO: we should probably escape also here ''${ \${
+ (r"\$\{", String.Interpol, '#push'),
+ include('root'),
+ ],
+ }
+
+ def analyse_text(text):
+ rv = 0.0
+ # TODO: let/in
+ if re.search(r'import.+?<[^>]+>', text):
+ rv += 0.4
+ if re.search(r'mkDerivation\s+(\(|\{|rec)', text):
+ rv += 0.4
+ if re.search(r'with\s+[a-zA-Z\.]+;', text):
+ rv += 0.2
+ if re.search(r'inherit\s+[a-zA-Z()\.];', text):
+ rv += 0.2
+ if re.search(r'=\s+mkIf\s+', text):
+ rv += 0.4
+ if re.search(r'\{[a-zA-Z,\s]+\}:', text):
+ rv += 0.1
+ return rv