fix: totally fix rustc version check

C-style shit syntax

sdgb-cli/Cargo.toml

@@ -29,4 +29,6 @@ nyquest-preset = { version = "0.2.0", features = ["async"] }
 palc = { version = "0.0.1", features = ["derive"] }
 futures-util = { version = "0.3.31", optional = true }
 ctrlc = { version = "3.4.7", features = ["termination"] }
-rustversion = "1.0.21"
+
+[build-dependencies]
+version_check = "0.9.5"

sdgb-cli/build.rs

@@ -0,0 +1,7 @@
+fn main() {
+    println!("cargo::rustc-check-cfg=cfg(file_lock_ready)");
+
+    if version_check::is_min_version("1.89") == Some(true) {
+        println!("cargo:rustc-cfg=file_lock_ready");
+    }
+}

sdgb-cli/src/main.rs

@@ -201,6 +201,17 @@ async fn main() -> Result<(), Box<dyn snafu::Error>> {
 
             use crate::cache::{open_table_read, read_txn};
 
+            let file = OpenOptions::new()
+                .create(true)
+                .truncate(true)
+                .write(true)
+                .open("players.json")?;
+
+            #[cfg(file_lock_ready)]
+            file.try_lock()?;
+
+            let writer = BufWriter::new(file);
+
             let txn = read_txn()?;
             let table = open_table_read(&txn)?;
 
@@ -215,18 +226,6 @@ async fn main() -> Result<(), Box<dyn snafu::Error>> {
                 .map(|(value, _)| value)
                 .collect::<Vec<GetUserPreviewApiResp>>();
 
-            let file = OpenOptions::new()
-                .create(true)
-                .truncate(true)
-                .write(true)
-                .open("players.json")?;
-
-            #[rustversion::since(1.89)]
-            {
-                file.lock()?;
-            }
-
-            let writer = BufWriter::new(file);
             serde_json::to_writer(writer, &user_ids)?;
             info!("dumped {} user id", user_ids.len());
         }