master/lib/guard.rb
Rémy Coutable 8fa0f1d4bc Match a Regex
2010-12-16 15:08:05 +01:00

104 lines
2.8 KiB
Ruby

require 'bundler'
module Guard
autoload :UI, 'guard/ui'
autoload :Dsl, 'guard/dsl'
autoload :Interactor, 'guard/interactor'
autoload :Listener, 'guard/listener'
autoload :Watcher, 'guard/watcher'
autoload :Notifier, 'guard/notifier'
class << self
attr_accessor :options, :guards, :listener
# initialize this singleton
def setup(options = {})
@options = options
@listener = Listener.select_and_init
@guards = []
self
end
def start(options = {})
setup(options)
Interactor.init_signal_traps
Dsl.evaluate_guardfile
if guards.empty?
UI.error "No guards found in Guardfile, please add at least one."
else
UI.info "Guard is now watching at '#{Dir.pwd}'"
guards.each { |g| supervised_task(g, :start) }
Thread.new { listener.start }
wait_for_changes_and_launch_guards
end
end
def wait_for_changes_and_launch_guards
loop do
if !running? && !listener.changed_files.empty?
changed_files = listener.get_and_clear_changed_files
if Watcher.match_files?(guards, changed_files)
run do
guards.each do |guard|
paths = Watcher.match_files(guard, changed_files)
supervised_task(guard, :run_on_change, paths) unless paths.empty?
end
end
end
end
sleep 0.2
end
end
# Let a guard execute its task but
# fire it if his work leads to a system failure
def supervised_task(guard, task_to_supervise, *args)
guard.send(task_to_supervise, *args)
rescue Exception
UI.error("#{guard.class.name} guard failed to achieve its <#{task_to_supervise.to_s}> command: #{$!}")
::Guard.guards.delete guard
UI.info("Guard #{guard.class.name} has just been fired")
return $!
end
def run
@run = true
UI.clear if options[:clear]
begin
yield
rescue Interrupt
end
@run = false
end
def running?
@run == true
end
def add_guard(name, watchers = [], options = {})
guard_class = get_guard_class(name)
@guards << guard_class.new(watchers, options)
end
def get_guard_class(name)
require "guard/#{name.downcase}"
klasses = []
ObjectSpace.each_object(Class) do |klass|
klasses << klass if klass.to_s.downcase.match(/^guard::#{name.downcase}/)
end
klasses.first
rescue LoadError
UI.error "Could not find gem 'guard-#{name}', please add it in your Gemfile."
end
def locate_guard(name)
`gem open guard-#{name} --latest --command echo`.chomp
rescue
UI.error "Could not find 'guard-#{name}' gem path."
end
end
end