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Contents
module ShellOpts
module Grammar
# Program is the root object of the grammar
class Program < Command
# Array of non-option litteral arguments (ie. what comes after the double dash ('+--+') in
# the usage definition). Initially empty but filled out during compilation
attr_reader :args
# Initialize a top-level Program object
def initialize(name, option_list)
super(nil, name, option_list)
@args = []
end
# Usage string to be used in error messages. The string is kept short by
# only listing the shortest option (if there is more than one)
def usage
(
render_options(option_list) +
commands.values.map { |cmd| render_command(cmd) } +
args
).flatten.join(" ")
end
# :nocov:
def dump(&block)
super {
puts "args: #{args.inspect}"
puts "usage: #{usage.inspect}"
}
end
# :nocov:
private
def render_command(command)
[command.name] + render_options(command.option_list) +
command.commands.values.map { |cmd| render_command(cmd) }.flatten
end
def render_options(options)
options.map { |opt|
s = opt.names.first
if opt.argument?
arg_string =
if opt.label
opt.label
elsif opt.integer?
"INT"
elsif opt.float?
"FLOAT"
else
"ARG"
end
if opt.optional?
s += "[=#{arg_string}]"
else
s += "=#{arg_string}"
end
end
s
}
end
end
end
end
Version data entries
9 entries across 9 versions & 1 rubygems