Configure SConstruct to download redot-cpp repo in gdextension mode

SConstruct

@@ -2,8 +2,30 @@
 import os
 import sys
 
+import pathlib
 
-env = SConscript("godot-cpp/SConstruct")
+
+redot_cpp_git = "https://github.com/speratus/redot-cpp"
+redot_target_version = '26.1'
+artifact_name = "libgdextension"
+
+p = pathlib.Path("redot-cpp")
+
+if not p.exists():
+    print("Directory redot-cpp/ is missing. Cloning repository...")
+    import subprocess
+    result = subprocess.run(
+        ["git", "clone", "-b", redot_target_version, redot_cpp_git],
+        check=True
+    )
+    if result.returncode != 0:
+        print("Cloning redot-cpp repository failed.")
+        Exit(1)
+    else:
+        print("Finished cloning redot-cpp repository.")
+
+
+env = SConscript("redot-cpp/SConstruct")
 
 # For reference:
 # - CCFLAGS are compilation flags shared between C and C++
@@ -14,19 +36,19 @@ env = SConscript("godot-cpp/SConstruct")
 # - LINKFLAGS are for linking flags
 
 # tweak this if you want to use different folders, or more folders, to store your source code in.
-env.Append(CPPPATH=["src/"])
+# env.Append(CPPPATH=["src/"])
 
 # Context-specific define for GDExtension
 env.Append(CPPDEFINES=["GD_EXTENSION_BUILD"])
-sources = Glob("src/*.cpp")
+sources = Glob("*.cpp")
 
 if env["platform"] == "macos":
     library = env.SharedLibrary(
         "demo/bin/{}.{}.{}.framework/{}.{}.{}".format(
-            project_config.lib_name(),
+            artifact_name,
             env["platform"],
             env["target"],
-            project_config.lib_name(),
+            artifact_name,
             env["platform"],
             env["target"]
         ),
@@ -35,17 +57,17 @@ if env["platform"] == "macos":
 elif env["platform"] == "ios":
     if env["ios_simulator"]:
         library = env.StaticLibrary(
-            "demo/bin/{}.{}.{}.simulator.a".format(project_config.lib_name(), env["platform"], env["target"]),
+            "demo/bin/{}.{}.{}.simulator.a".format(artifact_name, env["platform"], env["target"]),
             source=sources,
         )
     else:
         library = env.StaticLibrary(
-            "demo/bin/{}.{}.{}.a".format(project_config.lib_name(), env["platform"], env["target"]),
+            "demo/bin/{}.{}.{}.a".format(artifact_name, env["platform"], env["target"]),
             source=sources,
         )
 else:
     library = env.SharedLibrary(
-        "demo/bin/{}{}{}".format(project_config.lib_name(), env["suffix"], env["SHLIBSUFFIX"]),
+        "demo/bin/{}{}{}".format(artifact_name, env["suffix"], env["SHLIBSUFFIX"]),
         source=sources,
     )