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Versions: 15
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Contents
module GLI
class CommandFinder
# Initialize a finder on the given list of commands, using default_command as the default if none found
def initialize(commands,default_command)
@default_command = default_command
@names_to_commands = {}
commands.each do |command_name,command|
@names_to_commands[command_name.to_s] = command
Array(command.aliases).each do |command_alias|
@names_to_commands[command_alias.to_s] = command
end
end
end
# Finds the command with the given name, allowing for partial matches. Returns the command named by
# the default command if no command with +name+ matched
def find_command(name)
name ||= @default_command
raise UnknownCommand.new("No command name given nor default available") if String(name).strip == ''
command_found = @names_to_commands.fetch(name.to_s) do |command_to_match|
find_command_by_partial_name(@names_to_commands, command_to_match)
end
if Array(command_found).empty?
raise UnknownCommand.new("Unknown command '#{name}'")
elsif command_found.kind_of? Array
raise AmbiguousCommand.new("Ambiguous command '#{name}'. It matches #{command_found.sort.join(',')}")
end
command_found
end
private
def find_command_by_partial_name(names_to_commands, command_to_match)
partial_matches = names_to_commands.keys.select { |command_name| command_name =~ /^#{command_to_match}/ }
return names_to_commands[partial_matches[0]] if partial_matches.size == 1
partial_matches
end
end
end
Version data entries
15 entries across 15 versions & 2 rubygems