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# -*- coding: utf-8 -*- #
# frozen_string_literal: true
module Rouge
class TextAnalyzer < String
# Find a shebang. Returns nil if no shebang is present.
def shebang
return @shebang if instance_variable_defined? :@shebang
self =~ /\A\s*#!(.*)$/
@shebang = $1
end
# Check if the given shebang is present.
#
# This normalizes things so that `text.shebang?('bash')` will detect
# `#!/bash`, '#!/bin/bash', '#!/usr/bin/env bash', and '#!/bin/bash -x'
def shebang?(match)
return false unless shebang
match = /\b#{match}(\s|$)/
match === shebang
end
# Return the contents of the doctype tag if present, nil otherwise.
def doctype
return @doctype if instance_variable_defined? :@doctype
self =~ %r(\A\s*
(?:<\?.*?\?>\s*)? # possible <?xml...?> tag
<!DOCTYPE\s+(.+?)>
)xm
@doctype = $1
end
# Check if the doctype matches a given regexp or string
def doctype?(type=//)
type === doctype
end
# Return true if the result of lexing with the given lexer contains no
# error tokens.
def lexes_cleanly?(lexer)
lexer.lex(self) do |(tok, _)|
return false if tok.name == 'Error'
end
true
end
end
end
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