86 lines
2.7 KiB
Python
86 lines
2.7 KiB
Python
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# 2.3 imports
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from optparse import OptionParser
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# our imports
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import lex
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class ShGrammar(lex.Grammar):
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GRAMMAR_LIST = [
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{'name': "method",
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'expr': r"""[a-zA-Z_][a-zA-Z0-9_]*(?=\(\))""",
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'action': lex.make_token},
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{'name': 'reserved',
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'expr': r"""(?:case|done|do|elif|else|esac|fi|for|function|if|in|select|then|until|while|time)(?![a-zA-Z0-9_=])""",
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'action': lex.make_token},
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{'name': 'builtin',
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'expr': r"""(?:source|alias|bg|bind|break|builtin|cd|command|compgen|complete|declare|dirs|disown|echo|enable|eval|exec|exit|export|fc|fg|getops|hash|help|history|jobs|kill|let|local|logout|popd|printf|pushd|pwd|readonly|read|return|set|shift|shopt|suspend|test|times|trap|type|ulimit|umask|unalias|unset|wait)(?![a-zA-Z0-9_=/])""",
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'action': lex.make_token},
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{'name': 'operator',
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'expr': r"""(?:-eq|-ne|-gt|-lt|-ge|-le| = | != )""",
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'action': lex.make_token},
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## {'name': 'redirection',
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## 'expr': r"(?:[1-6] *)?> *(?:&[1-6]|(?:\\.|[^\\\"';| ])+)",
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## 'action': lex.make_token},
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{'name': 'delimiter',
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'expr': """[][\(\);\{\}|&><]""",
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'action': lex.make_token},
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## {'name': 'variable0',
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## 'expr': r"""(?:(?<=\n)|^) *[a-zA-Z_][a-zA-Z0-9_]*(?=\=)""",
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## 'action': lex.make_token},
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{'name': 'variable0',
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'expr': r"""(?:(?<=\n) *|^ *| +)[a-zA-Z_][a-zA-Z0-9_]*(?=\=)""",
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'action': lex.make_token},
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{'name': "variable1",
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'expr': r"\${(?:[a-zA-Z0-9_]+|\?\$)}",
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'action': lex.make_token},
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{'name': "variable2",
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'expr': r"\$[^({][a-zA-Z0-9_]*",
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'action': lex.make_token},
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{'name': "variable3",
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'expr': r"\$(?=\()",
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'action': lex.make_token},
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{'name': "eval",
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'expr': r'`(?:\\.|[^\\`])*(?:`|.?$)',
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'action': lex.make_token},
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{'name': "string1",
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'expr': r'"(?:\\.|[^\\"])*(?:"|.?$)',
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'action': lex.make_token},
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{'name': "string2",
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'expr': r"'(?:\\.|[^\\'])*(?:'|.?$)",
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'action': lex.make_token},
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{'name': 'continuation',
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'expr': r"""\\(?= *(\n|$))""",
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'action': lex.make_token},
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{'name': "comment",
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'expr': r'[#].*(?:\n|$)',
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'action': lex.make_token},
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{'name': 'bareword',
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'expr': r"""[a-zA-Z0-9_-]+""",
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'action': lex.make_token},
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{'name': "default",
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'expr': r'\\.|.|\n',
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'action': lex.silent}
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]
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def _default_rules(self):
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"""subclasses can override this to define defaults for a grammar"""
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for rdir in ShGrammar.GRAMMAR_LIST:
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self.add_rule(**rdir)
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