Include SDL 2.30.1 and link to Rust project for Windows development

Make it easier to develop with SDL2 and Rust on Windows by getting
a build environment setup.

Previously attempted using 'cargo-vcpkg' but encountered build issues
due to vcpkg relying on liblzma port that has been taken down due to
being compromised: microsoft/vcpkg#37839

rust/pong/Cargo.toml

@@ -1,19 +1,10 @@
 [package]
+build = "build.rs"
 name = "pong"
 version = "0.1.0"
 edition = "2021"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
-[dependencies.sdl2]
-version = "0.36"
-default-features = false
-features = ["ttf","image","gfx","mixer","static-link","use-vcpkg"]
-
-[package.metadata.vcpkg]
-dependencies = ["sdl2", "sdl2-image[libjpeg-turbo,tiff,libwebp]", "sdl2-ttf", "sdl2-gfx", "sdl2-mixer"]
-git = "https://github.com/microsoft/vcpkg"
-rev = "a34c873a9717a888f58dc05268dea15592c2f0ff"
-
-[package.metadata.vcpkg.target]
-x86_64-pc-windows-msvc = { triplet = "x64-windows-static-md" }
+[dependencies]
+sdl2 = "0.36"

rust/pong/Makefile

@@ -1,6 +1,7 @@
 default: build
 
 build:
-	cargo install cargo-vcpkg
-	cargo vcpkg build
 	cargo build
+
+run:
+	cargo run

rust/pong/build.rs

@@ -0,0 +1,41 @@
+use std::env;
+use std::path::PathBuf;
+
+fn main() {
+    let target = env::var("TARGET").unwrap();
+    if target.contains("pc-windows") {
+        let manifest_dir = PathBuf::from(env::var("CARGO_MANIFEST_DIR").unwrap());
+        let mut lib_dir = manifest_dir.clone();
+        let mut dll_dir = manifest_dir.clone();
+        if target.contains("msvc") {
+            lib_dir.push("msvc");
+            dll_dir.push("msvc");
+        } else {
+            lib_dir.push("gnu-mingw");
+            dll_dir.push("gnu-mingw");
+        }
+        lib_dir.push("lib");
+        dll_dir.push("dll");
+        if target.contains("x86_64") {
+            lib_dir.push("64");
+            dll_dir.push("64");
+        } else {
+            lib_dir.push("32");
+            dll_dir.push("32");
+        }
+        println!("cargo:rustc-link-search=all={}", lib_dir.display());
+        for entry in std::fs::read_dir(dll_dir).expect("Can't read DLL dir") {
+            let entry_path = entry.expect("Invalid fs entry").path();
+            let file_name_result = entry_path.file_name();
+            let mut new_file_path = manifest_dir.clone();
+            if let Some(file_name) = file_name_result {
+                let file_name = file_name.to_str().unwrap();
+                if file_name.ends_with(".dll") {
+                    new_file_path.push(file_name);
+                    std::fs::copy(&entry_path, new_file_path.as_path())
+                        .expect("Can't copy from DLL dir");
+                }
+            }
+        }
+    }
+}