<%
if print_line_number
Ruby2HTML.compile(f).each_with_index do |line, idx|
%><%= sprintf('%4d %s', idx+1, line) %><%
end
else
%><%= Ruby2HTML.compile(f) %><%
end
%>
EndTemplate
require 'ripper'
require 'stringio'
require 'cgi'
require 'erb'
require 'optparse'
def main
encoding = 'us-ascii'
css = nil
print_line_number = false
parser = OptionParser.new
parser.banner = "Usage: #{File.basename($0)} [-l] [...]"
parser.on('--encoding=NAME', 'Character encoding [us-ascii].') {|name|
encoding = name
}
parser.on('--css=URL', 'Set a link to CSS.') {|url|
css = url
}
parser.on('-l', '--line-number', 'Show line number.') {
print_line_number = true
}
parser.on('--help', 'Prints this message and quit.') {
puts parser.help
exit 0
}
begin
parser.parse!
rescue OptionParser::ParseError => err
$stderr.puts err
$stderr.puts parser.help
exit 1
end
puts ruby2html(ARGF, encoding, css, print_line_number)
end
class ERB
attr_accessor :lineno
remove_method :result
def result(b)
eval(@src, b, (@filename || '(erb)'), (@lineno || 1))
end
end
def ruby2html(f, encoding, css, print_line_number)
if RUBY_VERSION >= '2.6'
erb = ERB.new(TEMPLATE, trim_mode: '>')
else
erb = ERB.new(TEMPLATE, nil, '>')
end
erb.filename = __FILE__
erb.lineno = TEMPLATE_LINE
erb.result(binding())
end
class Ruby2HTML < Ripper::Filter
def Ruby2HTML.compile(f)
buf = StringIO.new
Ruby2HTML.new(f).parse(buf)
buf.string
end
def on_default(event, tok, f)
f << CGI.escapeHTML(tok)
end
def on_kw(tok, f)
f << %Q[#{CGI.escapeHTML(tok)}]
end
def on_comment(tok, f)
f << %Q[#{CGI.escapeHTML(tok.rstrip)}\n]
end
def on_tstring_beg(tok, f)
f << %Q[#{CGI.escapeHTML(tok)}]
end
def on_tstring_end(tok, f)
f << %Q[#{CGI.escapeHTML(tok)}]
end
end
if $0 == __FILE__
main
end