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module Gitlab
module SlashCommands
module Dsl
extend ActiveSupport::Concern
included do
@command_definitions = []
end
module ClassMethods
def command_definitions
@command_definitions
end
def command_names
command_definitions.flat_map do |command_definition|
[command_definition[:name], command_definition[:aliases]].flatten
end
end
# Allows to give a description to the next slash command
def desc(text)
@description = text
end
# Allows to define params for the next slash command
def params(*params)
@params = params
end
# Registers a new command which is recognizeable
# from body of email or comment.
# Example:
#
# command :command_key do |arguments|
# # Awesome code block
# end
#
def command(*command_names, &block)
command_name, *aliases = command_names
proxy_method_name = "__#{command_name}__"
# This proxy method is needed because calling `return` from inside a
# block/proc, causes a `return` from the enclosing method or lambda,
# otherwise a LocalJumpError error is raised.
define_method(proxy_method_name, &block)
define_method(command_name) do |*args|
proxy_method = method(proxy_method_name)
if proxy_method.arity == -1 || proxy_method.arity == args.size
instance_exec(*args, &proxy_method)
end
end
private command_name
aliases.each do |alias_command|
alias_method alias_command, command_name
private alias_command
end
command_definition = {
name: command_name,
aliases: aliases,
description: @description || '',
params: @params || []
}
@command_definitions << command_definition
@description = nil
@params = nil
end
end
end
end
end
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