257 lines
8.1 KiB
Ruby
257 lines
8.1 KiB
Ruby
module Guard
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autoload :UI, 'guard/ui'
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autoload :Dsl, 'guard/dsl'
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autoload :DslDescriber, 'guard/dsl_describer'
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autoload :Interactor, 'guard/interactor'
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autoload :Listener, 'guard/listener'
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autoload :Watcher, 'guard/watcher'
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autoload :Notifier, 'guard/notifier'
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autoload :Hook, 'guard/hook'
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class << self
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attr_accessor :options, :guards, :groups, :interactor, :listener
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# Initialize the Guard singleton.
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#
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# @param [Hash] options the Guard options.
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# @option options [Boolean] clear if auto clear the UI should be done
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# @option options [Boolean] notify if system notifications should be shown
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# @option options [Boolean] debug if debug output should be shown
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# @option options [Array<String>] group the list of groups to start
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# @option options [String] watchdir the director to watch
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# @option options [String] guardfile the path to the Guardfile
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#
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def setup(options = {})
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@options = options
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@guards = []
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@groups = [:default]
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@interactor = Interactor.new
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@listener = Listener.select_and_init(@options[:watchdir] ? File.expand_path(@options[:watchdir]) : Dir.pwd)
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@options[:notify] && ENV['GUARD_NOTIFY'] != 'false' ? Notifier.turn_on : Notifier.turn_off
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UI.clear if @options[:clear]
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debug_command_execution if @options[:debug]
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self
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end
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# Start Guard by evaluate the `Guardfile`, initialize the declared Guards
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# and start the available file change listener.
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#
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# @param [Hash] options the Guard options.
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# @option options [Boolean] clear if auto clear the UI should be done
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# @option options [Boolean] notify if system notifications should be shown
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# @option options [Boolean] debug if debug output should be shown
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# @option options [Array<String>] group the list of groups to start
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# @option options [String] watchdir the director to watch
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# @option options [String] guardfile the path to the Guardfile
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#
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def start(options = {})
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setup(options)
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Dsl.evaluate_guardfile(options)
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listener.on_change do |files|
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Dsl.reevaluate_guardfile if Watcher.match_guardfile?(files)
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listener.changed_files += files if Watcher.match_files?(guards, files)
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end
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UI.info "Guard is now watching at '#{ listener.directory }'"
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guards.each { |guard| supervised_task(guard, :start) }
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interactor.start
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listener.start
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end
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# Stop Guard listening to file changes
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#
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def stop
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UI.info 'Bye bye...', :reset => true
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listener.stop
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guards.each { |guard| supervised_task(guard, :stop) }
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abort
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end
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# Reload all Guards currently enabled.
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#
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def reload
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run do
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guards.each { |guard| supervised_task(guard, :reload) }
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end
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end
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# Trigger `run_all` on all Guards currently enabled.
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#
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def run_all
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run do
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guards.each { |guard| supervised_task(guard, :run_all) }
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end
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end
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# Pause Guard listening to file changes.
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#
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def pause
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if listener.locked
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UI.info 'Un-paused files modification listening', :reset => true
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listener.clear_changed_files
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listener.unlock
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else
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UI.info 'Paused files modification listening', :reset => true
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listener.lock
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end
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end
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# Trigger `run_on_change` on all Guards currently enabled and
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#
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def run_on_change(files)
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run do
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guards.each do |guard|
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paths = Watcher.match_files(guard, files)
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unless paths.empty?
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UI.debug "#{ guard.class.name }#run_on_change with #{ paths.inspect }"
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supervised_task(guard, :run_on_change, paths)
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end
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end
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end
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end
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# Run a block where the listener and the interactor is
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# blocked.
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#
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# @yield the block to run
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#
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def run
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listener.lock
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interactor.lock
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UI.clear if options[:clear]
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begin
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yield
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rescue Interrupt
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end
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interactor.unlock
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listener.unlock
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end
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# Let a Guard execute its task, but fire it
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# if his work leads to a system failure.
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#
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# @param [Guard::Guard] the guard to execute
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# @param [Symbol] task_to_supervise the task to run
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# @param [Array] args the arguments for the task
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# @return [Boolean, Exception] the result of the Guard
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#
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def supervised_task(guard, task_to_supervise, *args)
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guard.hook("#{ task_to_supervise }_begin", *args)
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result = guard.send(task_to_supervise, *args)
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guard.hook("#{ task_to_supervise }_end", result)
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result
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rescue Exception => ex
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UI.error("#{ guard.class.name } failed to achieve its <#{ task_to_supervise.to_s }>, exception was:" +
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"\n#{ ex.class }: #{ ex.message }\n#{ ex.backtrace.join("\n") }")
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guards.delete guard
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UI.info("\n#{ guard.class.name } has just been fired")
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ex
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end
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# Add a Guard to use.
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#
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# @param [String] name the Guard name
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# @param [Array<Watcher>] watchers the list of declared watchers
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# @param [Array<Hash>] callbacks the list of callbacks
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# @param [Hash] the Guard options
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#
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def add_guard(name, watchers = [], callbacks = [], options = {})
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if name.to_sym == :ego
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UI.deprecation('Guard::Ego is now part of Guard. You can remove it from your Guardfile.')
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else
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guard_class = get_guard_class(name)
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callbacks.each { |callback| Hook.add_callback(callback[:listener], guard_class, callback[:events]) }
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@guards << guard_class.new(watchers, options)
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end
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end
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# Add a Guard group.
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#
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# @param [String] name the group name
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#
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def add_group(name)
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@groups << name.to_sym unless name.nil?
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end
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# Tries to load the Guard main class.
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#
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# @param [String] name the name of the Guard
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# @return [Class, nil] the loaded class
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#
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def get_guard_class(name)
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name = name.to_s
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try_require = false
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const_name = name.downcase.gsub('-', '')
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begin
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require "guard/#{ name.downcase }" if try_require
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self.const_get(self.constants.find { |c| c.to_s.downcase == const_name })
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rescue TypeError
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unless try_require
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try_require = true
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retry
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else
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UI.error "Could not find class Guard::#{ const_name.capitalize }"
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end
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rescue LoadError => loadError
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UI.error "Could not load 'guard/#{ name.downcase }' or find class Guard::#{ const_name.capitalize }"
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UI.error loadError.to_s
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end
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end
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# Locate a path to a Guard gem.
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#
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# @param [String] name the name of the Guard without the prefix `guard-`
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# @return [String] the full path to the Guard gem
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#
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def locate_guard(name)
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if Gem::Version.create(Gem::VERSION) >= Gem::Version.create('1.8.0')
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Gem::Specification.find_by_name("guard-#{ name }").full_gem_path
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else
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Gem.source_index.find_name("guard-#{ name }").last.full_gem_path
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end
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rescue
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UI.error "Could not find 'guard-#{ name }' gem path."
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end
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# Returns a list of guard Gem names installed locally.
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#
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# @return [Array<String>] a list of guard gem names
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#
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def guard_gem_names
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if Gem::Version.create(Gem::VERSION) >= Gem::Version.create('1.8.0')
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Gem::Specification.find_all.select { |x| x.name =~ /^guard-/ }
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else
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Gem.source_index.find_name(/^guard-/)
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end.map { |x| x.name.sub /^guard-/, '' }
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end
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# Adds a command logger in debug mode. This wraps common command
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# execution functions and logs the executed command before execution.
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#
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def debug_command_execution
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Kernel.send(:alias_method, :original_system, :system)
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Kernel.send(:define_method, :system) do |command, *args|
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::Guard::UI.debug "Command execution: #{ command } #{ args.join(' ') }"
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original_system command, *args
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end
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Kernel.send(:alias_method, :original_backtick, :'`')
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Kernel.send(:define_method, :'`') do |command|
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::Guard::UI.debug "Command execution: #{ command }"
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original_backtick command
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end
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end
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end
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end
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