Add missing windows code

Author: Sytten

modules/os/src/windows.rs

@@ -1 +1,45 @@
+use once_cell::sync::Lazy;
+use windows_registry::{Value, LOCAL_MACHINE};
+use windows_result::{Error, Result};
+use windows_version::OsVersion;
 
+static OS_RELEASE: Lazy<String> = Lazy::new(release);
+static OS_VERSION: Lazy<String> = Lazy::new(|| version().unwrap_or_default());
+pub static EOL: &str = "\r\n";
+
+pub fn get_type() -> &'static str {
+    // In theory there are more types linx MinGW but in practice this is good enough
+    "Windows_NT"
+}
+
+pub fn get_release() -> &'static str {
+    &OS_RELEASE
+}
+
+pub fn get_version() -> &'static str {
+    &OS_VERSION
+}
+
+fn release() -> String {
+    let version = OsVersion::current();
+    format!("{}.{}.{}", version.major, version.minor, version.build)
+}
+
+fn version() -> Result<String> {
+    let version = OsVersion::current();
+
+    let registry_key = LOCAL_MACHINE.open("SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion")?;
+    let value = registry_key.get_value("ProductName")?;
+    let Value::String(mut value) = value else {
+        return Err(Error::empty());
+    };
+
+    // Windows 11 shares dwMajorVersion with Windows 10
+    // this workaround tries to disambiguate that by checking
+    // if the dwBuildNumber is from Windows 11 releases (>= 22000).
+    if version.major == 10 && version.build >= 22000 && value.starts_with("Windows 10") {
+        value.replace_range(9..10, "1");
+    }
+
+    Ok(value)
+}