feat: allow windows to build with either visual studio 2022 or visual studio 2019

Cargo.toml

@@ -6,7 +6,7 @@ repository = "https://github.com/tari-project/randomx-rs"
 homepage = "https://tari.com"
 readme = "README.md"
 license = "BSD-3-Clause"
-version = "1.3.1"
+version = "1.3.2"
 edition = "2018"
 build = "build.rs"
 

build.rs

@@ -52,16 +52,61 @@ fn main() {
     let target = env::var("TARGET").unwrap();
     // println!("target: {}", target);
     if host.contains("windows") && target.contains("windows-msvc") {
-        let c = Command::new("cmake")
+        let mut err_1 = "".to_string();
+        let mut err_2 = "".to_string();
+        let mut err_3 = "".to_string();
+        let mut success = false;
+        if let Ok(val) = Command::new("cmake")
             .arg("-G")
-            .arg("Visual Studio 16 2019")
+            .arg("Visual Studio 17 2022")
             .arg(repo_dir.to_str().unwrap())
             .output()
-            .expect("failed to execute CMake");
-        println!("status: {}", c.status);
-        std::io::stdout().write_all(&c.stdout).unwrap();
-        std::io::stderr().write_all(&c.stderr).unwrap();
-        assert!(c.status.success());
+        {
+            if val.status.success() {
+                success = true;
+            } else {
+                err_1 = String::from_utf8_lossy(&val.stderr).to_string();
+            }
+        }
+        if !success {
+            println!("'Visual Studio 17 2022' not found, trying 'Visual Studio 16 2019'");
+
+            // Remove all files (contents) from 'build_dir', but not 'build_dir' itself
+            if let Ok(dir_list) = fs::read_dir(build_dir) {
+                for entry in dir_list.flatten() {
+                    let path = entry.path();
+                    if path.is_file() {
+                        let _unused = fs::remove_file(path);
+                    } else if path.is_dir() {
+                        let _unused = fs::remove_dir_all(path);
+                    } else {
+                        // Nothing here
+                    }
+                }
+            }
+
+            match Command::new("cmake")
+                .arg("-G")
+                .arg("Visual Studio 16 2019")
+                .arg(repo_dir.to_str().unwrap())
+                .output()
+            {
+                Ok(val) => {
+                    if val.status.success() {
+                        success = true;
+                    } else {
+                        err_2 = String::from_utf8_lossy(&val.stderr).to_string();
+                    }
+                },
+                Err(err) => err_3 = err.to_string(),
+            }
+        }
+        if !success {
+            panic!(
+                "CMake failed with either Visual Studio 2022 (\n{}\n) or 'Visual Studio 16 2019' (\n{}\n) or (\n{}\n)",
+                err_1, err_2, err_3
+            );
+        }
 
         let m = Command::new("cmake")
             .arg("--build")