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145 lines
4.3 KiB
Python
145 lines
4.3 KiB
Python
"""
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pygments.lexers.nix
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~~~~~~~~~~~~~~~~~~~
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Lexers for the NixOS Nix language.
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:copyright: Copyright 2006-2025 by the Pygments team, see AUTHORS.
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:license: BSD, see LICENSE for details.
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"""
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import re
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from pygments.lexer import RegexLexer, include
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from pygments.token import Text, Comment, Operator, Keyword, Name, String, \
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Number, Punctuation, Literal
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__all__ = ['NixLexer']
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class NixLexer(RegexLexer):
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"""
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For the Nix language.
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"""
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name = 'Nix'
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url = 'http://nixos.org/nix/'
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aliases = ['nixos', 'nix']
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filenames = ['*.nix']
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mimetypes = ['text/x-nix']
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version_added = '2.0'
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keywords = ['rec', 'with', 'let', 'in', 'inherit', 'assert', 'if',
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'else', 'then', '...']
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builtins = ['import', 'abort', 'baseNameOf', 'dirOf', 'isNull', 'builtins',
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'map', 'removeAttrs', 'throw', 'toString', 'derivation']
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operators = ['++', '+', '?', '.', '!', '//', '==', '/',
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'!=', '&&', '||', '->', '=', '<', '>', '*', '-']
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punctuations = ["(", ")", "[", "]", ";", "{", "}", ":", ",", "@"]
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tokens = {
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'root': [
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# comments starting with #
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(r'#.*$', Comment.Single),
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# multiline comments
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(r'/\*', Comment.Multiline, 'comment'),
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# whitespace
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(r'\s+', Text),
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# keywords
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('({})'.format('|'.join(re.escape(entry) + '\\b' for entry in keywords)), Keyword),
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# highlight the builtins
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('({})'.format('|'.join(re.escape(entry) + '\\b' for entry in builtins)),
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Name.Builtin),
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(r'\b(true|false|null)\b', Name.Constant),
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# floats
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(r'-?(\d+\.\d*|\.\d+)([eE][-+]?\d+)?', Number.Float),
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# integers
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(r'-?[0-9]+', Number.Integer),
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# paths
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(r'[\w.+-]*(\/[\w.+-]+)+', Literal),
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(r'~(\/[\w.+-]+)+', Literal),
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(r'\<[\w.+-]+(\/[\w.+-]+)*\>', Literal),
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# operators
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('({})'.format('|'.join(re.escape(entry) for entry in operators)),
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Operator),
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# word operators
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(r'\b(or|and)\b', Operator.Word),
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(r'\{', Punctuation, 'block'),
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# punctuations
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('({})'.format('|'.join(re.escape(entry) for entry in punctuations)), Punctuation),
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# strings
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(r'"', String.Double, 'doublequote'),
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(r"''", String.Multiline, 'multiline'),
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# urls
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(r'[a-zA-Z][a-zA-Z0-9\+\-\.]*\:[\w%/?:@&=+$,\\.!~*\'-]+', Literal),
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# names of variables
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(r'[\w-]+(?=\s*=)', String.Symbol),
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(r'[a-zA-Z_][\w\'-]*', Text),
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(r"\$\{", String.Interpol, 'antiquote'),
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],
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'comment': [
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(r'[^/*]+', Comment.Multiline),
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(r'/\*', Comment.Multiline, '#push'),
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(r'\*/', Comment.Multiline, '#pop'),
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(r'[*/]', Comment.Multiline),
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],
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'multiline': [
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(r"''(\$|'|\\n|\\r|\\t|\\)", String.Escape),
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(r"''", String.Multiline, '#pop'),
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(r'\$\{', String.Interpol, 'antiquote'),
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(r"[^'\$]+", String.Multiline),
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(r"\$[^\{']", String.Multiline),
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(r"'[^']", String.Multiline),
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(r"\$(?=')", String.Multiline),
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],
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'doublequote': [
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(r'\\(\\|"|\$|n)', String.Escape),
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(r'"', String.Double, '#pop'),
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(r'\$\{', String.Interpol, 'antiquote'),
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(r'[^"\\\$]+', String.Double),
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(r'\$[^\{"]', String.Double),
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(r'\$(?=")', String.Double),
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(r'\\', String.Double),
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],
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'antiquote': [
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(r"\}", String.Interpol, '#pop'),
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# TODO: we should probably escape also here ''${ \${
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(r"\$\{", String.Interpol, '#push'),
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include('root'),
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],
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'block': [
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(r"\}", Punctuation, '#pop'),
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include('root'),
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],
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}
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def analyse_text(text):
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rv = 0.0
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# TODO: let/in
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if re.search(r'import.+?<[^>]+>', text):
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rv += 0.4
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if re.search(r'mkDerivation\s+(\(|\{|rec)', text):
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rv += 0.4
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if re.search(r'=\s+mkIf\s+', text):
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rv += 0.4
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if re.search(r'\{[a-zA-Z,\s]+\}:', text):
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rv += 0.1
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return rv
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