58 lines
1.6 KiB
Plaintext
58 lines
1.6 KiB
Plaintext
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/*
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Eskip routing configuration format for Skipper: https://github.com/zalando/skipper
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*/
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// TODO: definition with comment, doc = comment, or just replace comment
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eskip:root = (expression | definitions)?;
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comment-line:alias = "//" [^\n]*;
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space:alias = [ \b\f\r\t\v];
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comment:alias = comment-line (space* "\n" space* comment-line)*;
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wsc:alias = [ \b\f\n\r\t\v] | comment;
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decimal-digit:alias = [0-9];
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octal-digit:alias = [0-7];
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hexa-digit:alias = [0-9a-fA-F];
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decimal:alias = [1-9] decimal-digit*;
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octal:alias = "0" octal-digit*;
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hexa:alias = "0" [xX] hexa-digit+;
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int = decimal | octal | hexa;
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exponent:alias = [eE] [+\-]? decimal-digit+;
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float = decimal-digit+ "." decimal-digit* exponent?
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| "." decimal-digit+ exponent?
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| decimal-digit+ exponent;
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number:alias = "-"? (int | float);
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string = "\"" ([^\\"] | "\\" .)* "\"";
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regexp = "/" ([^\\/] | "\\" .)* "/";
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symbol = [a-zA-Z_] [a-zA-z0-9_]*;
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arg:alias = number | string | regexp;
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args:alias = arg (wsc* "," wsc* arg)*;
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term:alias = symbol wsc* "(" wsc* args? wsc* ")";
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predicate = term;
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predicates:alias = "*" | predicate (wsc* "&&" wsc* predicate)*;
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filter = term;
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filters:alias = filter (wsc* "->" wsc* filter)*;
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address:alias = string;
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shunt = "<shunt>";
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loopback = "<loopback>";
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backend:alias = address | shunt | loopback;
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expression = predicates (wsc* "->" wsc* filters)? wsc* "->" wsc* backend;
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id:alias = symbol;
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definition = id wsc* ":" wsc* expression;
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free-sep:alias = (wsc | ";");
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sep:alias = wsc* ";" free-sep*;
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definitions:alias = free-sep* definition (sep definition)* free-sep*;
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