Sha256: a161e0778813fd8bbab62855684d293511b87b67f369cb6ab504804085259fa1
Contents?: true
Size: 1.16 KB
Versions: 38
Compression:
Stored size: 1.16 KB
Contents
require "readline"
class Ppl::Command::Shell < Ppl::Application::Command
name "shell"
description "Interactive mode"
attr_writer :format
def options(parser, options)
parser.banner = "usage: ppl shell"
end
def execute(input, output)
begin
shell(input, output)
rescue SystemExit, Interrupt
terminate_gracefully(input, output)
false
end
end
private
def shell(input, output)
welcome_user(input, output)
while line = read_line(input)
break if ["exit", false].include?(line)
process_line(line)
end
terminate_gracefully(input, output)
true
end
def welcome_user(input, output)
if input.stdin.tty?
output.line("ppl #{Ppl::Version} (type \"exit\" to leave)")
end
end
def read_line(input)
prompt = determine_prompt(input.stdin)
line = Readline.readline(prompt, true)
end
def process_line(line)
command = "#{$0} #{line}"
Kernel.system(command)
end
def determine_prompt(io)
if io.tty?
"ppl> "
else
""
end
end
def terminate_gracefully(input, output)
if input.stdin.tty?
output.line("")
end
end
end
Version data entries
38 entries across 38 versions & 1 rubygems