Update rustup_wrapper

[skip ci]

tools/rustup_wrapper/src/main.rs

@@ -1,4 +1,5 @@
 use std::env;
+use std::path::Path;
 use std::process::{Command, Stdio};
 
 use home::cargo_home;
@@ -10,34 +11,34 @@ use home::cargo_home;
  * The command `rustup component list` does not work with custom toolchains:
  * > error: toolchain 'magisk' does not support components
  *
- * However, this command is used by several IDEs to determine available
- * components that can be used, such as clippy, rustfmt etc.
- * In this script, we simply redirect the output when using the nightly
+ * However, this command is used by several IDEs to determine component
+ * availability, such as clippy, rustfmt etc.
+ * In this program, we use the output of the command with the nightly
  * channel if any `component` command failed.
 */
 
 fn main() -> std::io::Result<()> {
-    let rustup = cargo_home()?.join("bin").join("rustup");
+    let exe = env::args().next().unwrap();
+    let exe = Path::new(&exe).file_name().unwrap().to_str().unwrap();
+    let real_exe = cargo_home()?.join("bin").join(exe);
     let argv: Vec<String> = env::args().skip(1).collect();
 
-    if argv.iter().any(|s| s == "component") {
-        let status = Command::new(&rustup)
+    if exe.starts_with("rustup") && argv.iter().any(|s| s == "component") {
+        let status = Command::new(&real_exe)
             .args(&argv)
             .stdout(Stdio::null())
             .stderr(Stdio::null())
             .status()?;
         if !status.success() {
-            let mut cmd = Command::new(&rustup);
+            let mut cmd = Command::new(&real_exe);
+            // Hardcode to use the nightly channel
             cmd.arg("+nightly");
-            if argv[0].starts_with('+') {
-                cmd.args(argv.iter().skip(1));
-            } else {
-                cmd.args(&argv);
-            }
+            // Remove any explicit channel specification
+            cmd.args(argv.iter().filter(|s| !s.starts_with('+')));
             return cmd.status().map(|_| ());
         }
     }
 
     // Simply pass through
-    Command::new(&rustup).args(argv.iter()).status().map(|_| ())
+    Command::new(&real_exe).args(argv.iter()).status().map(|_| ())
 }