Fetch all modules only -f is specified explicitly

src/fetch.py

@@ -195,14 +195,20 @@ class ModulePool(list):
         self.modules.append(new_module)
         return True
 
-    def fetch_all(self):
+    def fetch_all(self, unfetched_only = False):
         fetcher = self.ModuleFetcher()
         from copy import copy
         fetch_queue = copy(self.modules)
 
         while len(fetch_queue) > 0:
             cur_mod = fetch_queue.pop()
-            new_modules = fetcher.fetch_single_module(cur_mod)
+            if unfetched_only:
+                if cur_mod.isfetched:
+                    new_modules = cur_mod.submodules()
+                else:
+                    new_modules = fetcher.fetch_single_module(cur_mod)
+            else:
+                new_modules = fetcher.fetch_single_module(cur_mod)
 
             for mod in new_modules:
                 if not self.__contains(mod):

src/hdlmake_kernel.py

@@ -38,7 +38,7 @@ class HdlmakeKernel(object):
         tm = self.top_module
 
         if not self.modules_pool.is_everything_fetched():
-            self.fetch()
+            self.fetch(unfetched_only = True)
 
         if tm.action == "simulation":
             self.generate_modelsim_makefile()
@@ -52,9 +52,9 @@ class HdlmakeKernel(object):
             p.rawprint("Allowed actions are:\n\tsimulation\n\tsynthesis")
             quit()
 
-    def fetch(self):
+    def fetch(self, unfetched_only = False):
         p.rawprint("Fetching needed modules...")
-        self.modules_pool.fetch_all()
+        self.modules_pool.fetch_all(unfetched_only)
         p.vprint(str(self.modules_pool))
 
     def generate_modelsim_makefile(self):