1 files changed, 35 insertions, 0 deletions
diff --git a/methods.py b/methods.py
index c1245cd95a..ca6756f95f 100644
--- a/methods.py
+++ b/methods.py
@@ -231,6 +231,30 @@ def disable_module(self):
     self.disabled_modules.append(self.current_module)
 
 
+def module_check_dependencies(self, module, dependencies):
+    """
+    Checks if module dependencies are enabled for a given module,
+    and prints a warning if they aren't.
+    Meant to be used in module `can_build` methods.
+    Returns a boolean (True if dependencies are satisfied).
+    """
+    missing_deps = []
+    for dep in dependencies:
+        opt = "module_{}_enabled".format(dep)
+        if not opt in self or not self[opt]:
+            missing_deps.append(dep)
+
+    if missing_deps != []:
+        print(
+            "Disabling '{}' module as the following dependencies are not satisfied: {}".format(
+                module, ", ".join(missing_deps)
+            )
+        )
+        return False
+    else:
+        return True
+
+
 def use_windows_spawn_fix(self, platform=None):
 
     if os.name != "nt":
@@ -779,3 +803,14 @@ def show_progress(env):
 
     progress_finish_command = Command("progress_finish", [], progress_finish)
     AlwaysBuild(progress_finish_command)
+
+
+def dump(env):
+    # Dumps latest build information for debugging purposes and external tools.
+    from json import dump
+
+    def non_serializable(obj):
+        return "<<non-serializable: %s>>" % (type(obj).__qualname__)
+
+    with open(".scons_env.json", "w") as f:
+        dump(env.Dictionary(), f, indent=4, default=non_serializable)