141 lines
3.3 KiB
Ruby
141 lines
3.3 KiB
Ruby
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# -*- coding: utf-8 -*- #
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# frozen_string_literal: true
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module Rouge
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module Lexers
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class Gherkin < RegexLexer
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tag 'gherkin'
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aliases 'cucumber', 'behat'
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title "Gherkin"
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desc 'A business-readable spec DSL (github.com/cucumber/cucumber/wiki/Gherkin)'
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filenames '*.feature'
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mimetypes 'text/x-gherkin'
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def self.detect?(text)
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return true if text.shebang? 'cucumber'
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end
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# self-modifying method that loads the keywords file
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def self.keywords
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load File.join(__dir__, 'gherkin/keywords.rb')
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keywords
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end
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def self.step_regex
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# in Gherkin's config, keywords that end in < don't
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# need word boundaries at the ends - all others do.
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@step_regex ||= Regexp.new(
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keywords[:step].map do |w|
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if w.end_with? '<'
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Regexp.escape(w.chop)
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elsif w.end_with?(' ')
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Regexp.escape(w)
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else
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"#{Regexp.escape(w)}\\b"
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end
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end.join('|')
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)
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end
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rest_of_line = /.*?(?=[#\n])/
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state :basic do
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rule %r(#.*$), Comment
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rule %r/[ \r\t]+/, Text
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end
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state :root do
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mixin :basic
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rule %r(\n), Text
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rule %r(""".*?""")m, Str
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rule %r(@[^\s@]+), Name::Tag
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mixin :has_table
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mixin :has_examples
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end
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state :has_scenarios do
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rule %r((.*?)(:)) do |m|
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reset_stack
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keyword = m[1]
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keyword_tok = if self.class.keywords[:element].include? keyword
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push :description; Keyword::Namespace
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elsif self.class.keywords[:feature].include? keyword
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push :feature_description; Keyword::Declaration
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elsif self.class.keywords[:examples].include? keyword
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push :example_description; Name::Namespace
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else
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Error
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end
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groups keyword_tok, Punctuation
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end
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end
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state :has_examples do
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mixin :has_scenarios
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rule Gherkin.step_regex, Name::Function do
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token Name::Function
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reset_stack; push :step
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end
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end
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state :has_table do
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rule(/(?=[|])/) { push :table_header }
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end
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state :table_header do
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rule %r/[^|\s]+/, Name::Variable
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rule %r/\n/ do
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token Text
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goto :table
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end
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mixin :table
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end
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state :table do
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mixin :basic
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rule %r/\n/, Text, :table_bol
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rule %r/[|]/, Punctuation
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rule %r/[^|\s]+/, Name
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end
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state :table_bol do
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rule(/(?=\s*[^\s|])/) { reset_stack }
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rule(//) { pop! }
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end
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state :description do
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mixin :basic
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mixin :has_examples
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rule %r/\n/, Text
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rule rest_of_line, Text
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end
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state :feature_description do
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mixin :basic
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mixin :has_scenarios
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rule %r/\n/, Text
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rule rest_of_line, Text
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end
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state :example_description do
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mixin :basic
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mixin :has_table
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rule %r/\n/, Text
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rule rest_of_line, Text
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end
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state :step do
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mixin :basic
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rule %r/<.*?>/, Name::Variable
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rule %r/".*?"/, Str
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rule %r/\S[^\s<]*/, Text
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rule rest_of_line, Text, :pop!
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end
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end
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end
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end
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