2017-07-14 19:28:54 +00:00
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module.exports = grammar({
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name: 'bash',
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inline: $ => [$.control_operator],
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2017-07-14 20:54:05 +00:00
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externals: $ => [
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2017-07-14 21:27:13 +00:00
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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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2017-07-14 20:54:05 +00:00
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],
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2017-07-14 21:34:49 +00:00
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extras: $ => [
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$.comment,
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2017-07-14 21:39:28 +00:00
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token(choice(/\s/, '\\\n')),
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2017-07-14 21:34:49 +00:00
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],
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2017-07-14 19:28:54 +00:00
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rules: {
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program: $ => repeat($.command),
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command: $ => seq(
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choice(
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$.simple_command,
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$.pipeline,
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$.list
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),
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$.control_operator
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),
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simple_command: $ => seq(
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2017-07-14 19:43:42 +00:00
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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($.leading_word, 'command_name'),
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optional(seq(
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/\s+/,
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2017-07-14 20:00:41 +00:00
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repeat(choice(
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rename($.word, 'argument'),
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$.expansion,
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$.operator_expansion
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))
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2017-07-14 19:43:42 +00:00
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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(seq(
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$.simple_command,
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choice('|', '|&'),
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$.simple_command
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)),
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list: $ => prec.left(seq(
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choice(
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$.simple_command,
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$.list,
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$.pipeline
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),
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choice('&&', ';'),
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choice(
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$.simple_command,
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$.pipeline
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)
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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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2017-07-14 19:43:42 +00:00
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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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2017-07-14 20:54:05 +00:00
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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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2017-07-14 21:27:13 +00:00
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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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2017-07-14 19:43:42 +00:00
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file_descriptor: $ => token(prec(1, /\d+/)),
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leading_word: $ => /[^\\\s#=|;:{}]+/,
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2017-07-14 21:39:28 +00:00
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word: $ => /[^#\\\s$<>{}&]+/,
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2017-07-14 19:28:54 +00:00
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control_operator: $ => choice(
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'\n',
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';;'
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2017-07-14 21:34:49 +00:00
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),
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comment: $ => /#.*/,
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2017-07-14 19:28:54 +00:00
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}
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});
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