#!/usr/bin/env ruby
require ‘optparse’
require ‘net/http’
Command-Line Interface.
class Cli
Languages = %w{C89 C C++ C# Java Pascal Perl PHP PL/I Python Ruby
SQL VB Plain\ Text}
Aliases = {“c99” => “C”, “visual basic” => “VB”, “text” => “Plain
Text”}
PasteUrl = “http://rafb.net/paste/paste.php”
attr :parser
attr :opt
Initialize the command-line parser and set default values for the
options.
def initialize
@opt = {
:lang => “Plain Text”,
:nick => “”,
:desc => “”,
:tabs => “No”,
:help => false}
@parser = OptionParser.new do |cli|
cli.banner += " [file …]"
cli.on(‘-l’,‘–lang=L’, ‘select language’) { |s|
l = s.downcase
opt[:lang] =
if Aliases.include?(l) then
Aliases[l]
else
Languages.find(proc{ raise OptionParser::InvalidArgument,l
}) { |x| x.downcase == l}
end
}
cli.on(‘-n’, ‘–nick=NAME’, ‘use NAME as nickname’) { |s|
opt[:nick] = s}
cli.on(‘-d’, ‘–desc=TEXT’, ‘use TEXT as description’) { |s|
opt[:desc] << s }
cli.on( ‘–tabs=N’, Integer, ‘expand tabs to N blanks (N >=
0)’) {|n|
raise OptionParser::InvalidArgument, n unless n>=0
opt[:tabs] = n
}
cli.on(‘-h’, ‘–help’, ‘show this information and quit’) {
opt[:help] = true }
cli.separator “”
cli.separator “Languages (case insensitive):”
cli.separator "
“+(Languages+Aliases.keys).map{|x|x.downcase}.sort.join(”,")
end
end
Post the given text with the current options to the given uri and
return the uri for the posted text.
def paste(uri, text)
response = Net::HTTP.post_form(
uri,
{ “lang” => opt[:lang],
“nick” => opt[:nick],
“desc” => opt[:desc],
“cvt_tabs” => opt[:tabs],
“text” => text,
“submit” => “Paste” })
uri.merge response[‘location’] || raise(“No URL returned by
server.”)
end
Parse the command-line and post the content of the input files to
PasteUrl. Standard input is used if no input files are specified
or whenever a single dash is specified as input file.
def run
parser.parse!(ARGV)
if opt[:help]
puts parser.help
else
puts paste(URI.parse(PasteUrl), ARGF.read)
end
rescue OptionParser::ParseError => error
puts error
puts parser.help()
end
end
if FILE == $0
Cli.new.run
end
=begin rdoc
:section: A few remarks
The part of this script that actually deals with the http service is
rather short, entirely contained in Cli#paste.
Most of the code sets up the command-line interface so that the user
can specify options such as a nickname, a description, tab expansion,
and the language used for (a rather discreet) syntax highlihting.
A summary of the command-line syntax can be obtained by typing
cat2rafb --help
on the command line or by
require ‘cat2rafb’
cli = Cli.new;
puts cli.parser.help
in ruby.
=end
