add handling for cmd custom commands

src/modules/custom.rs

@@ -161,6 +161,7 @@ fn shell_command(cmd: &str, shell_args: &[&str]) -> Option<Output> {
             .stderr(Stdio::piped());
 
         handle_powershell(&mut command, &forced_shell, shell_args);
+        handle_cmd(&mut command, &forced_shell, shell_args);
 
         if let Ok(mut child) = command.spawn() {
             child.stdin.as_mut()?.write_all(cmd.as_bytes()).ok()?;
@@ -247,6 +248,15 @@ fn handle_powershell(command: &mut Command, shell: &str, shell_args: &[&str]) {
     }
 }
 
+#[cfg(windows)]
+fn handle_cmd(command: &mut Command, shell: &str, shell_args: &[&str]) {
+    let is_cmd = shell.ends_with("cmd.exe") || shell.ends_with("cmd");
+
+    if is_cmd && shell_args.is_empty() {
+        command.arg("/C");
+    }
+}
+
 #[cfg(test)]
 mod tests {
     use super::*;