Make module dependency check recursive

The `env.disabled_modules` and `methods.disable_module` weren't used anywhere
so the first one was repurposed and the second just deleted

Signed-off-by: Yevhen Babiichuk (DustDFG) <dfgdust@gmail.com>

SConstruct

@@ -149,13 +149,11 @@ env.PrependENVPath("PKG_CONFIG_PATH", os.getenv("PKG_CONFIG_PATH"))
 if "TERM" in os.environ:  # Used for colored output.
     env["ENV"]["TERM"] = os.environ["TERM"]
 
-env.disabled_modules = []
+env.disabled_modules = set()
 env.module_version_string = ""
 env.msvc = False
 env.scons_version = env._get_major_minor_revision(scons_raw_version)
 
-env.__class__.disable_module = methods.disable_module
-
 env.__class__.add_module_version_string = methods.add_module_version_string
 
 env.__class__.add_source_files = methods.add_source_files

methods.py

@@ -404,10 +404,6 @@ def convert_custom_modules_path(path):
     return path
 
 
-def disable_module(self):
-    self.disabled_modules.append(self.current_module)
-
-
 def module_add_dependencies(self, module, dependencies, optional=False):
     """
     Adds dependencies for a given module.
@@ -428,19 +424,21 @@ def module_check_dependencies(self, module):
     Meant to be used in module `can_build` methods.
     Returns a boolean (True if dependencies are satisfied).
     """
-    missing_deps = []
+    missing_deps = set()
     required_deps = self.module_dependencies[module][0] if module in self.module_dependencies else []
     for dep in required_deps:
         opt = "module_{}_enabled".format(dep)
-        if opt not in self or not self[opt]:
-            missing_deps.append(dep)
+        if opt not in self or not self[opt] or not module_check_dependencies(self, dep):
+            missing_deps.add(dep)
 
-    if missing_deps != []:
+    if missing_deps:
+        if module not in self.disabled_modules:
             print_warning(
                 "Disabling '{}' module as the following dependencies are not satisfied: {}".format(
                     module, ", ".join(missing_deps)
                 )
             )
+            self.disabled_modules.add(module)
         return False
     else:
         return True