Homebrew: Allow colons, direct check for outdated formula

packaging/os/homebrew.py

@@ -119,6 +119,7 @@ class Homebrew(object):
         /                   # slash (for taps)
         \+                  # plusses
         -                   # dashes
+        :                   # colons (for URLs)
     '''
 
     INVALID_PATH_REGEX        = _create_regex_group(VALID_PATH_CHARS)
@@ -394,18 +395,17 @@ class Homebrew(object):
 
         return False
 
-    def _outdated_packages(self):
+    def _current_package_is_outdated(self):
+        if not self.valid_package(self.current_package):
+            return False
+
         rc, out, err = self.module.run_command([
             self.brew_path,
             'outdated',
+            self.current_package,
         ])
-        return [line.split(' ')[0].strip() for line in out.split('\n') if line]
-
-    def _current_package_is_outdated(self):
-        if not self.valid_package(self.current_package):
-            return False
 
-        return self.current_package in self._outdated_packages()
+        return rc != 0
 
     def _current_package_is_installed_from_head(self):
         if not Homebrew.valid_package(self.current_package):