add support for parsing aliases...

casimport/__init__.py

@@ -124,6 +124,20 @@ class CASFinder(MetaPathFinder, Loader):
 	def __exit__(self, exc_type, exc_value, traceback):
 		self.disconnect()
 
+	@staticmethod
+	def _parsealiases(data):
+		ret = {}
+
+		lines = data.split('\n')
+		for i in lines:
+			if not i:
+				continue
+
+			name, hash = i.split()
+			ret.setdefault(name, []).append(hash)
+
+		return ret
+
 	def disconnect(self):
 		'''Disconnect this Finder from being used to load modules.
 
@@ -276,6 +290,17 @@ class Test(unittest.TestCase):
 			# if we try to create a second, it fails
 			self.assertRaises(RuntimeError, CASFinder)
 
+	def test_parsealiases(self):
+		with open(self.fixtures / 'randpkg' / 'cas_aliases.txt') as fp:
+			aliasdata = fp.read()
+			res = CASFinder._parsealiases(aliasdata)
+			self.assertEqual(res, {
+				'hello': [
+					'hash://sha256/330884aa2febb5e19fb7194ec6a69ed11dd3d77122f1a5175ee93e73cf0161c3?type=text/x-python',
+					'ipfs://bafkreibtbcckul7lwxqz7nyzj3dknhwrdxj5o4jc6gsroxxjhzz46albym',
+				]
+			})
+
 	def test_loaderpriority(self):
 		# XXX - write test to allow you to specify the priority of
 		# a loader, to ensure that cache stays at top.

fixtures/randpkg/cas_aliases.txt

@@ -0,0 +1,2 @@
+hello	hash://sha256/330884aa2febb5e19fb7194ec6a69ed11dd3d77122f1a5175ee93e73cf0161c3?type=text/x-python
+hello	ipfs://bafkreibtbcckul7lwxqz7nyzj3dknhwrdxj5o4jc6gsroxxjhzz46albym