SCons: List `.gen.cpp` sources explicitly to avoid globbing errors

Whenever we change the name (or remove) generated cpp files with the `.gen.cpp`
extension, users run into build issues when switching between branches (i.e.
switching before and after the name change/removal). This is because we glob
`*.cpp` so if a now-obsolete file from a previous build is present, we'll
include it too, potentially leading to bugs or compilation failure (due to
missing headers or invalid code).

So globbing patterns in `add_source_files` will now skip files ending with
`.gen.cpp`, which should instead be passed explicitly where they're used.

(cherry picked from commit c133480531)

core/SCsub

@@ -151,6 +151,7 @@ env.core_sources += thirdparty_obj
 # Godot source files
 
 env.add_source_files(env.core_sources, "*.cpp")
+env.add_source_files(env.core_sources, "script_encryption_key.gen.cpp")
 
 # Certificates
 env.Depends(

editor/SCsub

@@ -91,6 +91,7 @@ if env["tools"]:
     env.CommandNoCache("#editor/builtin_fonts.gen.h", flist, run_in_subprocess(editor_builders.make_fonts_header))
 
     env.add_source_files(env.editor_sources, "*.cpp")
+    env.add_source_files(env.editor_sources, "register_exporters.gen.cpp")
 
     SConscript("collada/SCsub")
     SConscript("doc/SCsub")

main/SCsub

@@ -10,18 +10,15 @@ env.main_sources = []
 env.add_source_files(env.main_sources, "*.cpp")
 
 # Order matters here. Higher index controller database files write on top of lower index database files.
-controller_databases = ["#main/gamecontrollerdb.txt", "#main/godotcontrollerdb.txt"]
+controller_databases = ["gamecontrollerdb.txt", "godotcontrollerdb.txt"]
 
-env.Depends("#main/default_controller_mappings.gen.cpp", controller_databases)
-env.CommandNoCache(
-    "#main/default_controller_mappings.gen.cpp",
+gensource = env.CommandNoCache(
+    "default_controller_mappings.gen.cpp",
     controller_databases,
     run_in_subprocess(main_builders.make_default_controller_mappings),
 )
 
-# Don't warn about duplicate entry here, we need it registered manually for first build,
-# even if later builds will pick it up twice due to above *.cpp globbing.
-env.add_source_files(env.main_sources, "#main/default_controller_mappings.gen.cpp", warn_duplicates=False)
+env.add_source_files(env.main_sources, gensource)
 
 env.Depends("#main/splash.gen.h", "#main/splash.png")
 env.CommandNoCache("#main/splash.gen.h", "#main/splash.png", run_in_subprocess(main_builders.make_splash))

methods.py

@@ -11,7 +11,7 @@ from SCons.Script import Glob
 from SCons.Variables.BoolVariable import _text2bool
 
 
-def add_source_files(self, sources, files, warn_duplicates=True):
+def add_source_files(self, sources, files):
     # Convert string to list of absolute paths (including expanding wildcard)
     if isbasestring(files):
         # Keep SCons project-absolute path as they are (no wildcard support)
@@ -21,17 +21,20 @@ def add_source_files(self, sources, files, warn_duplicates=True):
                 return
             files = [files]
         else:
+            # Exclude .gen.cpp files from globbing, to avoid including obsolete ones.
+            # They should instead be added manually.
+            skip_gen_cpp = "*" in files
             dir_path = self.Dir(".").abspath
             files = sorted(glob.glob(dir_path + "/" + files))
+            if skip_gen_cpp:
+                files = [f for f in files if not f.endswith(".gen.cpp")]
 
     # Add each path as compiled Object following environment (self) configuration
     for path in files:
         obj = self.Object(path)
         if obj in sources:
-            if warn_duplicates:
-                print('WARNING: Object "{}" already included in environment sources.'.format(obj))
-            else:
-                continue
+            print('WARNING: Object "{}" already included in environment sources.'.format(obj))
+            continue
         sources.append(obj)