C#: Make editor create NuGet fallback folder for Godot packages

Main benefits:
- Projects can be built offline. Previously you needed internet
  access the first time building to download the packages.
- Changes to packages like Godot.NET.Sdk can be easily tested
  before publishing. This was already possible but required
  too many manual steps.
- First time builds are a bit faster, as the Sdk package doesn't
  need to be downloaded. In practice, the package is very small
  so it makes little difference.

Bumped Godot.NET.Sdk to 4.0.0-dev3 in order to enable the
recent changes regarding '.mono/' -> '.godot/mono/'.

1 files changed, 45 insertions, 0 deletions

diff --git a/modules/mono/build_scripts/godot_net_sdk_build.py b/modules/mono/build_scripts/godot_net_sdk_build.py
new file mode 100644
index 0000000000..3bfba0f0f6
--- /dev/null
+++ b/modules/mono/build_scripts/godot_net_sdk_build.py
@@ -0,0 +1,45 @@
+# Build Godot.NET.Sdk solution
+
+import os
+
+from SCons.Script import Dir
+
+
+def build_godot_net_sdk(source, target, env):
+    # source and target elements are of type SCons.Node.FS.File, hence why we convert them to str
+
+    module_dir = env["module_dir"]
+
+    solution_path = os.path.join(module_dir, "editor/Godot.NET.Sdk/Godot.NET.Sdk.sln")
+    build_config = "Release"
+
+    from .solution_builder import build_solution
+
+    extra_msbuild_args = ["/p:GodotPlatform=" + env["platform"]]
+
+    build_solution(env, solution_path, build_config, extra_msbuild_args)
+    # No need to copy targets. The Godot.NET.Sdk csproj takes care of copying them.
+
+
+def build(env_mono):
+    assert env_mono["tools"]
+
+    output_dir = Dir("#bin").abspath
+    editor_tools_dir = os.path.join(output_dir, "GodotSharp", "Tools")
+    nupkgs_dir = os.path.join(editor_tools_dir, "nupkgs")
+
+    module_dir = os.getcwd()
+
+    package_version_file = os.path.join(
+        module_dir, "editor", "Godot.NET.Sdk", "Godot.NET.Sdk", "Godot.NET.Sdk_PackageVersion.txt"
+    )
+
+    with open(package_version_file, mode="r") as f:
+        version = f.read().strip()
+
+    target_filenames = ["Godot.NET.Sdk.%s.nupkg" % version]
+
+    targets = [os.path.join(nupkgs_dir, filename) for filename in target_filenames]
+
+    cmd = env_mono.CommandNoCache(targets, [], build_godot_net_sdk, module_dir=module_dir)
+    env_mono.AlwaysBuild(cmd)