135 lines
3.9 KiB
Python
135 lines
3.9 KiB
Python
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"""
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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 2006-2022 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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.. versionadded:: 2.0
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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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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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('(%s)' % '|'.join(re.escape(entry) + '\\b' for entry in keywords), Keyword),
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# highlight the builtins
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('(%s)' % '|'.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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# operators
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('(%s)' % '|'.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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# punctuations
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('(%s)' % '|'.join(re.escape(entry) for entry in punctuations), Punctuation),
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# integers
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(r'[0-9]+', Number.Integer),
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# strings
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(r'"', String.Double, 'doublequote'),
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(r"''", String.Single, 'singlequote'),
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# paths
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(r'[\w.+-]*(\/[\w.+-]+)+', Literal),
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(r'\<[\w.+-]+(\/[\w.+-]+)*\>', Literal),
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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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],
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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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'singlequote': [
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(r"'''", String.Escape),
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(r"''\$\{", String.Escape),
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(r"''\n", String.Escape),
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(r"''\r", String.Escape),
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(r"''\t", String.Escape),
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(r"''", String.Single, '#pop'),
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(r'\$\{', String.Interpol, 'antiquote'),
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(r"[^']", String.Single),
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],
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'doublequote': [
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(r'\\', String.Escape),
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(r'\\"', String.Escape),
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(r'\\$\{', 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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],
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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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}
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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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