From d4d390c3675598095fe5a5c7390541c7d6387754 Mon Sep 17 00:00:00 2001
From: Zac Medico <zmedico@gentoo.org>
Date: Sat, 5 Jul 2008 13:19:01 +0000
Subject: Split out common code from CompositeTask and EbuildExecuter into a
 new CompositeTask class and rename the old CompositeTask class to
 TaskSequence.

svn path=/main/trunk/; revision=10943
---
 pym/_emerge/__init__.py | 71 ++++++++++++++++++++-----------------------------
 1 file changed, 29 insertions(+), 42 deletions(-)

diff --git a/pym/_emerge/__init__.py b/pym/_emerge/__init__.py
index 622274185..33d7ea075 100644
--- a/pym/_emerge/__init__.py
+++ b/pym/_emerge/__init__.py
@@ -1499,29 +1499,13 @@ class AsynchronousTask(SlotObject):
 			self._exit_listeners = None
 
 class CompositeTask(AsynchronousTask):
-	"""
-	A collection of tasks that executes sequentially. Each task
-	must have a _set_returncode() method that can be wrapped as
-	a means to trigger movement from one task to the next.
-	"""
-
-	__slots__ = ("scheduler",) + ("_current_task", "_task_queue")
 
-	def __init__(self, **kwargs):
-		AsynchronousTask.__init__(self, **kwargs)
-		self._task_queue = deque()
-
-	def add(self, task):
-		self._task_queue.append(task)
-
-	def start(self):
-		self._start_next_task()
+	__slots__ = ("scheduler",) + ("_current_task",)
 
 	def isAlive(self):
 		return self._current_task is not None
 
 	def cancel(self):
-		self._task_queue.clear()
 		self.cancelled = True
 		if self._current_task is not None:
 			self._current_task.cancel()
@@ -1532,12 +1516,36 @@ class CompositeTask(AsynchronousTask):
 			task = self._current_task
 			if task is None:
 				break
-			self.scheduler.schedule(task.reg_id)
+			if hasattr(task, "reg_id"):
+				self.scheduler.schedule(task.reg_id)
 			task.wait()
 
 		self._wait_hook()
 		return self.returncode
 
+class TaskSequence(CompositeTask):
+	"""
+	A collection of tasks that executes sequentially. Each task
+	must have a _set_returncode() method that can be wrapped as
+	a means to trigger movement from one task to the next.
+	"""
+
+	__slots__ = ("_task_queue",)
+
+	def __init__(self, **kwargs):
+		AsynchronousTask.__init__(self, **kwargs)
+		self._task_queue = deque()
+
+	def add(self, task):
+		self._task_queue.append(task)
+
+	def start(self):
+		self._start_next_task()
+
+	def cancel(self):
+		self._task_queue.clear()
+		CompositeTask.cancel(self)
+
 	def _start_next_task(self):
 		self._current_task = self._task_queue.popleft()
 		task = self._current_task
@@ -1945,9 +1953,9 @@ class EbuildBuild(EbuildBuildDir):
 				self.unlock()
 		return os.EX_OK
 
-class EbuildExecuter(AsynchronousTask):
+class EbuildExecuter(CompositeTask):
 
-	__slots__ = ("pkg", "scheduler", "settings") + ("_current_task",)
+	__slots__ = ("pkg", "scheduler", "settings")
 
 	_phases = ("setup", "unpack", "compile", "test", "install")
 
@@ -1986,7 +1994,7 @@ class EbuildExecuter(AsynchronousTask):
 			2 : sys.stderr.fileno(),
 		}
 
-		ebuild_phases = CompositeTask(scheduler=scheduler)
+		ebuild_phases = TaskSequence(scheduler=scheduler)
 
 		for phase in self._phases:
 			ebuild_phases.add(EbuildPhase(fd_pipes=fd_pipes,
@@ -2001,27 +2009,6 @@ class EbuildExecuter(AsynchronousTask):
 		self.returncode = ebuild_phases.returncode
 		self._current_task = None
 
-	def isAlive(self):
-		return self._current_task is not None
-
-	def cancel(self):
-		self.cancelled = True
-		if self._current_task is not None:
-			self._current_task.cancel()
-
-	def wait(self):
-
-		while True:
-			task = self._current_task
-			if task is None:
-				break
-			if hasattr(task, "reg_id"):
-				self.scheduler.schedule(task.reg_id)
-			task.wait()
-
-		self._wait_hook()
-		return self.returncode
-
 class EbuildPhase(SubProcess):
 
 	__slots__ = ("fd_pipes", "phase", "pkg",
-- 
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