add version config

sdkserver/src/config/version_config.rs

@@ -0,0 +1,29 @@
+use std::collections::HashMap;
+
+use lazy_static::lazy_static;
+use serde::Deserialize;
+use serde_json::from_str;
+
+const DEFAULT_VERSIONS: &str = include_str!("../../versions.json");
+
+#[derive(Deserialize)]
+pub struct VersionConfig {
+    pub asset_bundle_url: String,
+    pub ex_resource_url: String,
+    pub lua_url: String,
+    pub lua_version: String,
+}
+
+lazy_static! {
+    pub static ref INSTANCE: HashMap<String, VersionConfig> = {
+        let local_config = std::path::Path::new("versions.json");
+        let data = if local_config.exists() {
+            std::fs::read_to_string("versions.json").unwrap()
+        } else {
+            std::fs::write("versions.json", DEFAULT_VERSIONS).unwrap();
+            DEFAULT_VERSIONS.to_string()
+        };
+
+        from_str(&data).unwrap()
+    };
+}