4 files changed, 101 insertions, 12 deletions
diff --git a/pym/portage/env/config.py b/pym/portage/env/config.py
index eccd35e08..e3898c539 100644
--- a/pym/portage/env/config.py
+++ b/pym/portage/env/config.py
@@ -112,3 +112,58 @@ class PackageUseFile(PackageUse):
 						self.data[key].append(items)
 					else:
 						self.data[key] = items
+
+class PackageMask(UserDIct):
+	"""
+	A base class for Package.mask functionality
+	"""
+	data = {}
+	
+	def iteritems(self):
+		return self.data.iteritems()
+	
+	def __hash__(self):
+		return hash(self.data)
+	
+	def __contains__(self, other):
+		return other in self.data
+	
+	def keys(self):
+		return self.data.keys()
+	
+	def iterkeys(self):
+		return self.data.iterkeys()
+
+class PackageMaskFile(PackageMask):
+	"""
+	A class that implements a file-based package.mask
+	
+	Entires in package.mask are of the form:
+	atom1
+	atom2
+	or optionally
+	-atom3
+	to revert a previous mask; this only works when masking files are stacked
+	"""
+	
+	def __init__(self, filename):
+		self.fname = filename
+	
+	def load(self, recursive):
+		"""
+		Package.keywords files have comments that begin with #.
+		The entries are of the form:
+		>>> atom useflag1 useflag2 useflag3..
+		useflags may optionally be negative with a minus sign (-)
+		>>> atom useflag1 -useflag2 useflag3
+		"""
+		
+		if os.path.exists( self.fname ):
+			f = open(self.fname, 'rb')
+			for line in f:
+				if line.startswith('#'):
+					continue
+				split = line.split()
+				if len(split):
+					atom = split[0] # This is an extra assignment, but I think it makes the code more explicit in what goes into the dict
+					self.data[atom] = None # we only care about keys in the dict, basically abusing it as a list
diff --git a/pym/portage/tests/env/config/test_PackageKeywordsFile.py b/pym/portage/tests/env/config/test_PackageKeywordsFile.py
index 6c5475881..1d72504b9 100644
--- a/pym/portage/tests/env/config/test_PackageKeywordsFile.py
+++ b/pym/portage/tests/env/config/test_PackageKeywordsFile.py
@@ -18,12 +18,14 @@ class PackageKeywordsFileTestCase(TestCase):
 		"""
 
 		self.BuildFile()
-		f = PackageKeywordsFile(self.fname)
-		f.load(recursive=False)
-		for cpv, keyword in f.iteritems():
-			self.assertEqual( cpv, self.cpv )
-			[k for k in keyword if self.assertTrue(k in self.keywords)]
-		self.NukeFile()
+		try:
+			f = PackageKeywordsFile(self.fname)
+			f.load(recursive=False)
+			for cpv, keyword in f.iteritems():
+				self.assertEqual( cpv, self.cpv )
+				[k for k in keyword if self.assertTrue(k in self.keywords)]
+		finally;
+			self.NukeFile()
 	
 	def BuildFile(self):
 		f = open(self.fname, 'wb')
diff --git a/pym/portage/tests/env/config/test_PackageMaskFile.py b/pym/portage/tests/env/config/test_PackageMaskFile.py
new file mode 100644
index 000000000..f17eaf021
--- /dev/null
+++ b/pym/portage/tests/env/config/test_PackageMaskFile.py
@@ -0,0 +1,30 @@
+# test_PackageMaskFile.py -- Portage Unit Testing Functionality
+# Copyright 2007 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+# $Id: test_PackageMaskFile.py 6182 2007-03-06 07:35:22Z antarus $
+
+from portage.env.config import PackageMaskFile
+from portage.tests import TestCase
+
+class PackageMaskFileTestCase(TestCase):
+
+	fname = 'package.mask'
+	atoms = ['sys-apps/portage','dev-util/diffball','not@va1id@t0m']
+	
+	def testPackageMaskLoad(self):
+		self.BuildFile()
+		try:
+			f = PackageMaskFile(self.fname)
+			f.load(recursive=False)
+			[atom for atom in f.iterkeys() if self.assertTrue(atom in self.atoms)]
+		finally:
+			self.NukeFile()
+	
+	def BuildFile(self):
+		f = open(self.fname, 'wb')
+		f.write("\n".join(atoms))
+		f.close()
+	
+	def NukeFile(self):
+		import os
+		os.unlink(self.fname)
diff --git a/pym/portage/tests/env/config/test_PackageUseFile.py b/pym/portage/tests/env/config/test_PackageUseFile.py
index 6dd76eeca..4638923df 100644
--- a/pym/portage/tests/env/config/test_PackageUseFile.py
+++ b/pym/portage/tests/env/config/test_PackageUseFile.py
@@ -17,12 +17,14 @@ class PackageUseFileTestCase(TestCase):
 		A simple test to ensure the load works properly
 		"""
 		self.BuildFile()
-		f = PackageUseFile(self.fname)
-		f.load(recursive=False)
-		for cpv, use in f.iteritems():
-			self.assertEqual( cpv, self.cpv )
-			[flag for flag in use if self.assertTrue(flag in self.useflags)]
-		self.NukeFile()
+		try:
+			f = PackageUseFile(self.fname)
+			f.load(recursive=False)
+			for cpv, use in f.iteritems():
+				self.assertEqual( cpv, self.cpv )
+				[flag for flag in use if self.assertTrue(flag in self.useflags)]
+		finally:
+			self.NukeFile()
 
 	def BuildFile(self):
 		f = open(self.fname, 'wb')