35 lines
909 B
Plaintext
35 lines
909 B
Plaintext
Justfile grammar is a little weird. Because of the freeform
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nature of recipe bodies, we don't tokenize them with the
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same rules as the rest of the justfile. Instead the
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tokenizer will emit a INDENT at the beginning of a recipe
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body, one or more LINEs, which match everything after the
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INDENT whitespace, and a DEDENT at the end.
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Thus the lexer is context sensitive, which is a little
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gross.
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tokens:
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NAME = /[a-z]((_|-)?[a-z0-9])*/
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EOL = /\n|\r\n/
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COMMENT = /#[^!].*/
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COLON = /:/
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INDENT = emitted when indentation increases
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DEDENT = emitted when indentation decreases
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LINE = /.*/ only emitted between INDENT/DEDENT pairs, doesn't include INDENT whitespace
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EOF = emitted at the end of input
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grammar:
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justfile = item* EOF
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item = COMMENT
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| recipe
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| EOL
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assignment = NAME EQUALS expression COMMENT? EOL
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expression = STRING
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recipe = NAME+ COLON NAME* EOL (INDENT LINE+ DEDENT)?
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