/usr/lib/ruby/vendor_ruby/rugments/cli.rb is in ruby-rugments 1.0.0~beta8-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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# to use this module, require 'rouge/cli'.
module Rugments
class FileReader
attr_reader :input
def initialize(input)
@input = input
end
def file
case input
when '-'
$stdin
when String
File.new(input)
when ->(i){ i.respond_to? :read }
input
end
end
def read
@read ||= begin
file.read
rescue => e
$stderr.puts "unable to open #{input}: #{e.message}"
exit 1
ensure
file.close
end
end
end
class CLI
def self.doc
return enum_for(:doc) unless block_given?
yield %|usage: rougify [command] [args...]|
yield %||
yield %|where <command> is one of:|
yield %| highlight #{Highlight.desc}|
yield %| help #{Help.desc}|
yield %| style #{Style.desc}|
yield %| list #{List.desc}|
yield %| version #{Version.desc}|
yield %||
yield %|See `rougify help <command>` for more info.|
end
class Error < StandardError
attr_reader :message, :status
def initialize(message, status=1)
@message = message
@status = status
end
end
def self.parse(argv=ARGV)
argv = normalize_syntax(argv)
mode = argv.shift
klass = class_from_arg(mode)
return klass.parse(argv) if klass
case mode
when '-h', '--help', 'help', '-help'
Help.parse(argv)
else
argv.unshift(mode) if mode
Highlight.parse(argv)
end
end
def initialize(options={})
end
def self.error!(msg, status=1)
raise Error.new(msg, status)
end
def error!(*a)
self.class.error!(*a)
end
def self.class_from_arg(arg)
case arg
when 'version', '--version'
Version
when 'help'
Help
when 'highlight', 'hi'
Highlight
when 'style'
Style
when 'list'
List
end
end
class Version < CLI
def self.desc
"print the rouge version number"
end
def self.parse(*); new; end
def run
puts Rouge.version
end
end
class Help < CLI
def self.desc
"print help info"
end
def self.doc
return enum_for(:doc) unless block_given?
yield %|usage: rougify help <command>|
yield %||
yield %|print help info for <command>.|
end
def self.parse(argv)
opts = { :mode => CLI }
until argv.empty?
arg = argv.shift
klass = class_from_arg(arg)
if klass
opts[:mode] = klass
next
end
end
new(opts)
end
def initialize(opts={})
@mode = opts[:mode]
end
def run
@mode.doc.each(&method(:puts))
end
end
class Highlight < CLI
def self.desc
"highlight code"
end
def self.doc
return enum_for(:doc) unless block_given?
yield %[usage: rougify highlight <filename> [options...]]
yield %[ rougify highlight [options...]]
yield %[]
yield %[--input-file|-i <filename> specify a file to read, or - to use stdin]
yield %[]
yield %[--lexer|-l <lexer> specify the lexer to use.]
yield %[ If not provided, rougify will try to guess]
yield %[ based on --mimetype, the filename, and the]
yield %[ file contents.]
yield %[]
yield %[--mimetype|-m <mimetype> specify a mimetype for lexer guessing]
yield %[]
yield %[--lexer-opts|-L <opts> specify lexer options in CGI format]
yield %[ (opt1=val1&opt2=val2)]
yield %[]
yield %[--formatter-opts|-F <opts> specify formatter options in CGI format]
yield %[ (opt1=val1&opt2=val2)]
end
def self.parse(argv)
opts = {
:formatter => 'terminal256',
:input_file => '-',
:lexer_opts => {},
:formatter_opts => {},
}
until argv.empty?
arg = argv.shift
case arg
when '--input-file', '-i'
opts[:input_file] = argv.shift
when '--mimetype', '-m'
opts[:mimetype] = argv.shift
when '--lexer', '-l'
opts[:lexer] = argv.shift
when '--formatter', '-f'
opts[:formatter] = argv.shift
when '--lexer-opts', '-L'
opts[:lexer_opts] = parse_cgi(argv.shift)
when '--formatter-opts', '-F'
opts[:formatter_opts] = parse_cgi(argv.shift)
when /^--/
error! "unknown option #{arg.inspect}"
else
opts[:input_file] = arg
end
end
new(opts)
end
def input_stream
@input_stream ||= FileReader.new(@input_file)
end
def input
@input ||= input_stream.read
end
def lexer_class
@lexer_class ||= Lexer.guess(
:filename => @input_file,
:mimetype => @mimetype,
:source => input_stream,
)
end
def lexer
@lexer ||= lexer_class.new(@lexer_opts)
end
attr_reader :input_file, :lexer_name, :mimetype, :formatter
def initialize(opts={})
@input_file = opts[:input_file]
if opts[:lexer]
@lexer_class = Lexer.find(opts[:lexer]) \
or error! "unkown lexer #{opts[:lexer].inspect}"
else
@lexer_name = opts[:lexer]
@mimetype = opts[:mimetype]
end
@lexer_opts = opts[:lexer_opts]
formatter_class = Formatter.find(opts[:formatter]) \
or error! "unknown formatter #{opts[:formatter]}"
@formatter = formatter_class.new(opts[:formatter_opts])
end
def run
formatter.format(lexer.lex(input), &method(:print))
end
private
def self.parse_cgi(str)
pairs = CGI.parse(str).map { |k, v| [k.to_sym, v.first] }
Hash[pairs]
end
end
class Style < CLI
def self.desc
"print CSS styles"
end
def self.doc
return enum_for(:doc) unless block_given?
yield %|usage: rougify style [<theme-name>] [<options>]|
yield %||
yield %|Print CSS styles for the given theme. Extra options are|
yield %|passed to the theme. Theme defaults to thankful_eyes.|
yield %||
yield %|options:|
yield %| --scope (default: .highlight) a css selector to scope by|
yield %||
yield %|available themes:|
yield %| #{Theme.registry.keys.sort.join(', ')}|
end
def self.parse(argv)
opts = { :theme_name => 'thankful_eyes' }
until argv.empty?
arg = argv.shift
case arg
when /--(\w+)/
opts[$1.tr('-', '_').to_sym] = argv.shift
else
opts[:theme_name] = arg
end
end
new(opts)
end
def initialize(opts)
theme_name = opts.delete(:theme_name)
theme_class = Theme.find(theme_name) \
or error! "unknown theme: #{theme_name}"
@theme = theme_class.new(opts)
end
def run
@theme.render(&method(:puts))
end
end
class List < CLI
def self.desc
"list available lexers"
end
def self.doc
return enum_for(:doc) unless block_given?
yield %|usage: rouge list|
yield %||
yield %|print a list of all available lexers with their descriptions.|
end
def self.parse(argv)
new
end
def run
puts "== Available Lexers =="
Lexer.all.sort_by(&:tag).each do |lexer|
desc = "#{lexer.desc}"
if lexer.aliases.any?
desc << " [aliases: #{lexer.aliases.join(',')}]"
end
puts "%s: %s" % [lexer.tag, desc]
puts
end
end
end
private
def self.normalize_syntax(argv)
out = []
argv.each do |arg|
case arg
when /^(--\w+)=(.*)$/
out << $1 << $2
when /^(-\w)(.+)$/
out << $1 << $2
else
out << arg
end
end
out
end
end
end
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