Added function for package check

ee/cli/plugins/stack.py

@@ -58,6 +58,11 @@ class EEStackController(CementBaseController):
                 dict(help='Install Utils stack', action='store_true')),
             ]
 
+    @expose(hide=True)
+    def package_check(self, packages=[]):
+        # Function for packages check
+        pass
+
     @expose(hide=True)
     def default(self):
         # TODO Default action for ee stack command

ee/core/aptget.py

@@ -215,3 +215,16 @@ class EEAptGet:
                       .format(err=str(e)))
                 return(False)
         return(True)
+
+    def is_installed(self, package):
+        # Cache Initialization
+        if not self.cache:
+            self.cache = apt.Cache()
+        # Cache Read
+        self.cache.open()
+        pkg = self.cache[package]
+        # Check Package Installed
+        if pkg.is_installed:
+            return True
+        else:
+            return False