110 lines
3.8 KiB
Python
110 lines
3.8 KiB
Python
"""
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pygments.lexers.dns
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~~~~~~~~~~~~~~~~~~~
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Pygments lexers for DNS
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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.token import Comment, Operator, Keyword, Name, String, \
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Number, Punctuation, Whitespace, Literal
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from pygments.lexer import RegexLexer, bygroups, include
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__all__ = ['DnsZoneLexer']
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CLASSES = [
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"IN",
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"CS",
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"CH",
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"HS",
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]
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CLASSES_RE = "(" + "|".join(CLASSES) + ')'
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class DnsZoneLexer(RegexLexer):
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"""
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Lexer for DNS zone file
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"""
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flags = re.MULTILINE
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name = 'Zone'
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aliases = ['zone']
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filenames = [ "*.zone" ]
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url = "https://datatracker.ietf.org/doc/html/rfc1035"
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mimetypes = ['text/dns']
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version_added = '2.16'
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tokens = {
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'root': [
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# Empty/comment line:
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(r'([ \t]*)(;.*)(\n)', bygroups(Whitespace, Comment.Single, Whitespace)),
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# Special directives:
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(r'^\$ORIGIN\b', Keyword, 'values'),
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(r'^\$TTL\b', Keyword, 'values'),
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(r'^\$INCLUDE\b', Comment.Preproc, 'include'),
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# TODO, $GENERATE https://bind9.readthedocs.io/en/v9.18.14/chapter3.html#soa-rr
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(r'^\$[A-Z]+\b', Keyword, 'values'),
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# Records:
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# <domain-name> [<TTL>] [<class>] <type> <RDATA> [<comment>]
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(r'^(@)([ \t]+)(?:([0-9]+[smhdw]?)([ \t]+))?(?:' + CLASSES_RE + "([ \t]+))?([A-Z]+)([ \t]+)",
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bygroups(Operator, Whitespace, Number.Integer, Whitespace, Name.Class, Whitespace, Keyword.Type, Whitespace),
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"values"),
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(r'^([^ \t\n]*)([ \t]+)(?:([0-9]+[smhdw]?)([ \t]+))?(?:' + CLASSES_RE + "([ \t]+))?([A-Z]+)([ \t]+)",
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bygroups(Name, Whitespace, Number.Integer, Whitespace, Name.Class, Whitespace, Keyword.Type, Whitespace),
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"values"),
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# <domain-name> [<class>] [<TTL>] <type> <RDATA> [<comment>]
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(r'^(Operator)([ \t]+)(?:' + CLASSES_RE + "([ \t]+))?(?:([0-9]+[smhdw]?)([ \t]+))?([A-Z]+)([ \t]+)",
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bygroups(Name, Whitespace, Number.Integer, Whitespace, Name.Class, Whitespace, Keyword.Type, Whitespace),
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"values"),
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(r'^([^ \t\n]*)([ \t]+)(?:' + CLASSES_RE + "([ \t]+))?(?:([0-9]+[smhdw]?)([ \t]+))?([A-Z]+)([ \t]+)",
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bygroups(Name, Whitespace, Number.Integer, Whitespace, Name.Class, Whitespace, Keyword.Type, Whitespace),
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"values"),
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],
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# Parsing values:
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'values': [
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(r'\n', Whitespace, "#pop"),
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(r'\(', Punctuation, 'nested'),
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include('simple-value'),
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],
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# Parsing nested values (...):
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'nested': [
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(r'\)', Punctuation, "#pop"),
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include('multiple-simple-values'),
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],
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# Parsing values:
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'simple-value': [
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(r'(;.*)', bygroups(Comment.Single)),
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(r'[ \t]+', Whitespace),
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(r"@\b", Operator),
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('"', String, 'string'),
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(r'[0-9]+[smhdw]?$', Number.Integer),
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(r'([0-9]+[smhdw]?)([ \t]+)', bygroups(Number.Integer, Whitespace)),
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(r'\S+', Literal),
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],
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'multiple-simple-values': [
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include('simple-value'),
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(r'[\n]+', Whitespace),
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],
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'include': [
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(r'([ \t]+)([^ \t\n]+)([ \t]+)([-\._a-zA-Z]+)([ \t]+)(;.*)?$',
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bygroups(Whitespace, Comment.PreprocFile, Whitespace, Name, Whitespace, Comment.Single), '#pop'),
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(r'([ \t]+)([^ \t\n]+)([ \t\n]+)$', bygroups(Whitespace, Comment.PreprocFile, Whitespace), '#pop'),
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],
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"string": [
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(r'\\"', String),
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(r'"', String, "#pop"),
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(r'[^"]+', String),
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]
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}
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def analyse_text(text):
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return text.startswith("$ORIGIN")
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