177 lines
3.3 KiB
JavaScript
177 lines
3.3 KiB
JavaScript
module.exports = grammar({
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name: 'bash',
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inline: $ => [$.statement, $.terminator],
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externals: $ => [
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$._simple_heredoc,
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$._heredoc_beginning,
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$._heredoc_middle,
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$._heredoc_end
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],
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extras: $ => [
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$.comment,
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token(choice(/\s/, '\\\n')),
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],
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rules: {
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program: $ => repeat($._terminated_statement),
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_terminated_statement: $ => seq(
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$.statement,
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$.terminator
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),
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statement: $ => choice(
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$.command,
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$.while_statement,
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$.if_statement,
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$.case_statement,
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$.pipeline,
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$.list
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),
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while_statement: $ => seq(
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'while',
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$._terminated_statement,
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$.do_group
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),
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do_group: $ => seq(
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'do',
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repeat($._terminated_statement),
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'done'
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),
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if_statement: $ => seq(
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'if',
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$._terminated_statement,
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'then',
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repeat($._terminated_statement),
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repeat($.elif_clause),
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optional($.else_clause),
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'fi'
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),
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elif_clause: $ => seq(
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'elif',
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$._terminated_statement,
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'then',
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repeat($._terminated_statement)
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),
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else_clause: $ => seq(
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'else',
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repeat($._terminated_statement)
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),
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case_statement: $ => seq(
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'case',
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rename($.word, 'argument'),
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optional($.terminator),
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'in',
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$.terminator,
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repeat($.case_item),
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'esac'
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),
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case_item: $ => seq(
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rename($.word, 'argument'),
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')',
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repeat($._terminated_statement),
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optional(';;')
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),
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command: $ => seq(
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repeat(choice(
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$.environment_variable_assignment,
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$.file_redirect
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)),
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rename($.leading_word, 'command_name'),
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optional(seq(
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/\s+/,
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repeat(choice(
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rename($.word, 'argument'),
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$.expansion,
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$.operator_expansion
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))
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)),
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repeat(choice(
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$.file_redirect,
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$.heredoc_redirect
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))
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),
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pipeline: $ => prec.left(1, seq(
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$.statement,
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choice('|', '|&'),
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$.statement
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)),
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list: $ => prec.left(seq(
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$.statement,
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choice('&&', '||'),
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$.statement
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)),
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environment_variable_assignment: $ => seq(
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rename($.leading_word, 'variable_name'),
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'=',
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rename($.word, 'argument')
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),
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expansion: $ => seq(
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'$',
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rename($.word, 'variable_name')
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),
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operator_expansion: $ => seq(
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'${',
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rename($.leading_word, 'variable_name'),
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optional(seq(
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choice(':', ':?', '='),
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rename($.word, 'argument')
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)),
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'}'
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),
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file_redirect: $ => seq(
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optional($.file_descriptor),
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choice('<', '>', '<&', '>&'),
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choice(
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$.file_descriptor,
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rename($.word, 'file_name')
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)
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),
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heredoc_redirect: $ => seq(
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choice('<<', '<<-'),
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$.heredoc
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),
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heredoc: $ => choice(
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$._simple_heredoc,
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seq(
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$._heredoc_beginning,
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repeat(choice(
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$.expansion,
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$.operator_expansion,
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$._heredoc_middle
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)),
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$._heredoc_end
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)
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),
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file_descriptor: $ => token(prec(1, /\d+/)),
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leading_word: $ => /[^\\\s#=|;:{}]+/,
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word: $ => /[^#\\\s$<>{}&;)]+/,
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comment: $ => /#.*/,
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terminator: $ => choice(';', ';;', '\n'),
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}
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});
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