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Contents
module GLI
module Commands
module HelpModules
# Finds commands from the application/command data structures
class CommandFinder
attr_reader :last_unknown_command
attr_reader :last_found_command
attr_writer :squelch_stderr
def initialize(app,arguments,error)
@app = app
@arguments = arguments
@error = error
@squelch_stderr = false
@last_unknown_command = nil
end
def find_command(name)
command = find_command_from_base(name,@app)
return if unknown_command?(command,name,@error)
@last_found_command = command
while !@arguments.empty?
name = @arguments.shift
command = find_command_from_base(name,command)
return if unknown_command?(command,name,@error)
@last_found_command = command
end
command
end
private
# Given the name of a command to find, and a base, either the app or another command, returns
# the command object or nil.
def find_command_from_base(command_name,base)
base.commands.values.select { |command|
if [command.name,Array(command.aliases)].flatten.map(&:to_s).any? { |_| _ == command_name }
command
end
}.first
end
# Checks if the return from find_command was unknown and, if so, prints an error
# for the user on the error device, returning true or false if the command was unknown.
def unknown_command?(command,name,error)
if command.nil?
@last_unknown_command = name
unless @squelch_stderr
error.puts "error: Unknown command '#{name}'. Use '#{@app.exe_name} help' for a list of commands."
end
true
else
false
end
end
end
end
end
end
Version data entries
41 entries across 41 versions & 2 rubygems