init: this is the inital commit

.gitignore

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+grammars/

example.ebnf

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+expr = term { ( "+" | "-" ) term } ;
+term = number { ( "*" | "/" ) number } ;

extension.toml

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+id = "ebnf"
+name = "EBNF"
+version = "0.0.1"
+schema_version = 1
+authors = ["Jooris Hadeler <jooris@hadeler.me>"]
+description = "Syntax highlighting for Extended Backus-Naur Form (EBNF)"
+
+[grammars.ebnf]
+repository = "https://git.hadeler.me/jooris/tree-sitter-ebnf"
+commit = "main"
+
+[lib]
+version = "0.1.0"

languages/ebnf/brackets.scm

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+; Standard brackets
+("[" @open "]" @close)
+("{" @open "}" @close)
+("(" @open ")" @close)
+
+; EBNF specific sequence brackets
+("(/" @open "/)" @close)
+("(:" @open ":)" @close)
+
+; Strings
+("\"" @open "\"" @close)
+("'" @open "'" @close)
+
+; Special sequence
+("?" @open "?" @close)

languages/ebnf/config.toml

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+name = "EBNF"
+grammar = "ebnf"
+path_suffixes = ["ebnf"]
+brackets = [
+    { start = "{", end = "}", close = true, newline = true },
+    { start = "[", end = "]", close = true, newline = true },
+    { start = "(", end = ")", close = true, newline = false },
+    { start = "(/", end = "/)", close = true, newline = false },
+    { start = "(:", end = ":)", close = true, newline = false },
+    { start = "\"", end = "\"", close = true, newline = false },
+    { start = "'", end = "'", close = true, newline = false }
+]
+
+[language_server]
+# Leave empty

languages/ebnf/highlights.scm

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+; variables and identifiers
+; We match the left-hand side of a rule as a function/type definition for better visual hierarchy
+(syntax_rule
+  (meta_identifier) @type)
+
+(meta_identifier) @property
+
+; Literals
+(terminal_string) @string
+(integer) @number
+
+; Comments and special sequences
+(comment) @comment
+(special_sequence) @string.special
+
+; Operators
+"=" @operator
+"|" @operator
+"-" @operator
+"*" @operator
+
+; Delimiters
+"," @punctuation.delimiter
+";" @punctuation.delimiter
+
+; Brackets
+"[" @punctuation.bracket
+"]" @punctuation.bracket
+"{" @punctuation.bracket
+"}" @punctuation.bracket
+"(" @punctuation.bracket
+")" @punctuation.bracket
+"(/" @punctuation.bracket
+"/)" @punctuation.bracket
+"(:" @punctuation.bracket
+":)" @punctuation.bracket
+"?" @punctuation.bracket

languages/ebnf/outline.scm

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+(syntax_rule
+  (meta_identifier) @name
+) @item