Merge pull request #3931 from c1728p9/arm_pack_manager_improvements

Arm pack manager improvements

tools/arm_pack_manager/__init__.py

@@ -13,6 +13,7 @@ from json import dump, load
 from zipfile import ZipFile
 from tempfile import gettempdir
 import warnings
+from distutils.version import LooseVersion
 
 warnings.filterwarnings("ignore")
 
@@ -31,7 +32,7 @@ def strip_protocol(url) :
 
 def largest_version(content) :
     return sorted([t['version'] for t in content.package.releases('release')],
-                  reverse=True, key=lambda v: map(int, v.split(".")))[0]
+                  reverse=True, key=lambda v: LooseVersion(v))[0]
 
 def do_queue(Class, function, interable) :
     q = Queue()
@@ -246,19 +247,23 @@ class Cache () :
         self.counter += 1
         self.display_counter("Scanning for Aliases")
 
-    def get_flash_algorthim_binary(self, device_name) :
+    def get_flash_algorthim_binary(self, device_name, all=False) :
         """Retrieve the flash algorithm file for a particular part.
 
         Assumes that both the PDSC and the PACK file associated with that part are in the cache.
 
         :param device_name: The exact name of a device
+        :param all: Return an iterator of all flash algos for this device
         :type device_name: str
         :return: A file-like object that, when read, is the ELF file that describes the flashing algorithm
-        :rtype: ZipExtFile
+        :return: A file-like object that, when read, is the ELF file that describes the flashing algorithm.
+                 When "all" is set to True then an iterator for file-like objects is returned
+        :rtype: ZipExtFile or ZipExtFile iterator if all is True
         """
         device = self.index[device_name]
         pack = self.pack_from_cache(device)
-        return pack.open(device['algorithm'].keys()[0])
+        algo_itr = (pack.open(path) for path in device['algorithm'].keys())
+        return algo_itr if all else algo_itr.next()
 
     def get_svd_file(self, device_name) :
         """Retrieve the flash algorithm file for a particular part.
@@ -352,7 +357,7 @@ class Cache () :
 
         """
         if not self._aliases :
-            with open(join(self.data_path, "aliases.json")) as i :
+            with open(LocalPackAliases) as i :
                 self._aliases = load(i)
         return self._aliases