From 151ccf14f01005e66e1fe99d139fb5b7dd588f38 Mon Sep 17 00:00:00 2001
From: Zac Medico <zmedico@gentoo.org>
Date: Wed, 4 Feb 2009 04:05:24 +0000
Subject: Add support in digraph for multiple priorities per edge and support
 for callable ignore_priority arguments that can be used for finer grained
 filtering.

svn path=/main/trunk/; revision=12580
---
 pym/portage/__init__.py | 112 +++++++++++++++++++++++++++++++++---------------
 1 file changed, 78 insertions(+), 34 deletions(-)

diff --git a/pym/portage/__init__.py b/pym/portage/__init__.py
index b2f0a1620..33e2956dd 100644
--- a/pym/portage/__init__.py
+++ b/pym/portage/__init__.py
@@ -368,18 +368,14 @@ class digraph(object):
 		if parent not in self.nodes:
 			self.nodes[parent] = ({}, {}, parent)
 			self.order.append(parent)
-		
-		if parent in self.nodes[node][1]:
-			if priority > self.nodes[node][1][parent]:
-				self.nodes[node][1][parent] = priority
-		else:
-			self.nodes[node][1][parent] = priority
-		
-		if node in self.nodes[parent][0]:
-			if priority > self.nodes[parent][0][node]:
-				self.nodes[parent][0][node] = priority
-		else:
-			self.nodes[parent][0][node] = priority
+
+		priorities = self.nodes[node][1].setdefault(parent, [])
+		priorities.append(priority)
+		priorities.sort()
+
+		priorities = self.nodes[parent][0].setdefault(node, [])
+		priorities.append(priority)
+		priorities.sort()
 
 	def remove(self, node):
 		"""Removes the specified node from the digraph, also removing
@@ -461,9 +457,16 @@ class digraph(object):
 		if ignore_priority is None:
 			return list(self.nodes[node][0])
 		children = []
-		for child, priority in self.nodes[node][0].iteritems():
-			if priority > ignore_priority:
-				children.append(child)
+		if hasattr(ignore_priority, '__call__'):
+			for child, priorities in self.nodes[node][0].iteritems():
+				for priority in priorities:
+					if not ignore_priority(priority):
+						children.append(child)
+						break
+		else:
+			for child, priorities in self.nodes[node][0].iteritems():
+				if ignore_priority < priorities[-1]:
+					children.append(child)
 		return children
 
 	def parent_nodes(self, node, ignore_priority=None):
@@ -471,9 +474,16 @@ class digraph(object):
 		if ignore_priority is None:
 			return list(self.nodes[node][1])
 		parents = []
-		for parent, priority in self.nodes[node][1].iteritems():
-			if priority > ignore_priority:
-				parents.append(parent)
+		if hasattr(ignore_priority, '__call__'):
+			for parent, priorities in self.nodes[node][1].iteritems():
+				for priority in priorities:
+					if not ignore_priority(priority):
+						parents.append(parent)
+						break
+		else:
+			for parent, priorities in self.nodes[node][1].iteritems():
+				if ignore_priority < priorities[-1]:
+					parents.append(parent)
 		return parents
 
 	def leaf_nodes(self, ignore_priority=None):
@@ -483,14 +493,31 @@ class digraph(object):
 		children in calculations."""
 		
 		leaf_nodes = []
-		for node in self.order:
-			is_leaf_node = True
-			for child in self.nodes[node][0]:
-				if self.nodes[node][0][child] > ignore_priority:
-					is_leaf_node = False
-					break
-			if is_leaf_node:
-				leaf_nodes.append(node)
+		if ignore_priority is None:
+			for node in self.order:
+				if not self.nodes[node][0]:
+					leaf_nodes.append(node)
+		elif hasattr(ignore_priority, '__call__'):
+			for node in self.order:
+				is_leaf_node = True
+				for child, priorities in self.nodes[node][0].iteritems():
+					for priority in priorities:
+						if not ignore_priority(priority):
+							is_leaf_node = False
+							break
+					if not is_leaf_node:
+						break
+				if is_leaf_node:
+					leaf_nodes.append(node)
+		else:
+			for node in self.order:
+				is_leaf_node = True
+				for child, priorities in self.nodes[node][0].iteritems():
+					if ignore_priority < priorities[-1]:
+						is_leaf_node = False
+						break
+				if is_leaf_node:
+					leaf_nodes.append(node)
 		return leaf_nodes
 
 	def root_nodes(self, ignore_priority=None):
@@ -500,14 +527,31 @@ class digraph(object):
 		parents in calculations."""
 		
 		root_nodes = []
-		for node in self.order:
-			is_root_node = True
-			for parent in self.nodes[node][1]:
-				if self.nodes[node][1][parent] > ignore_priority:
-					is_root_node = False
-					break
-			if is_root_node:
-				root_nodes.append(node)
+		if ignore_priority is None:
+			for node in self.order:
+				if not self.nodes[node][1]:
+					root_nodes.append(node)
+		elif hasattr(ignore_priority, '__call__'):
+			for node in self.order:
+				is_root_node = True
+				for parent, priorities in self.nodes[node][1].iteritems():
+					for priority in priorities:
+						if not ignore_priority(priority):
+							is_root_node = False
+							break
+					if not is_root_node:
+						break
+				if is_root_node:
+					root_nodes.append(node)
+		else:
+			for node in self.order:
+				is_root_node = True
+				for parent, priorities in self.nodes[node][1].iteritems():
+					if ignore_priority < priorities[-1]:
+						is_root_node = False
+						break
+				if is_root_node:
+					root_nodes.append(node)
 		return root_nodes
 
 	def is_empty(self):
-- 
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