#358: Fix capitalization for SteamAppId env var lookup

CHANGELOG.md

@@ -8,6 +8,8 @@
   * When Steam was not installed, the logs would contain a `warning`-level message.
     This has been demoted to an `info`-level message.
   * GUI: Fixed some inconsistent spacing between elements.
+  * CLI: On Linux, the `wrap` command's `--infer steam` option would fail
+    to find the `SteamAppId` environment variable due to a case mismatch.
 * Changed:
   * GUI: Updated to the latest version of [Iced](https://github.com/iced-rs/iced).
     If the GUI fails to load, Ludusavi will log the error info.

src/wrap.rs

@@ -10,14 +10,16 @@ pub struct WrapGameInfo {
 
 impl WrapGameInfo {
     fn is_empty(&self) -> bool {
-        self.name.is_none() && self.gog_id.is_none()
+        let Self { name, steam_id, gog_id } = self;
+
+        name.is_none() && steam_id.is_none() && gog_id.is_none()
     }
 }
 
 pub fn infer_game_from_steam() -> Option<WrapGameInfo> {
-    let app_id = std::env::var("STEAMAPPID").ok()?.parse::<u32>().ok()?;
+    let app_id = std::env::var("SteamAppId").ok()?.parse::<u32>().ok()?;
 
-    log::debug!("Found Steam environment variable: STEAMAPPID={}", app_id);
+    log::debug!("Found Steam environment variable: SteamAppId={}", app_id);
 
     let result = WrapGameInfo {
         steam_id: Some(app_id),