Added print help by default

build.rs

@@ -1,24 +1,26 @@
-use std::io::Write;
-
-fn main() {
-    let mut res = winres::WindowsResource::new();
-    res.set_manifest(r#"
-<assembly xmlns="urn:schemas-microsoft-com:asm.v1" manifestVersion="1.0">
-<trustInfo xmlns="urn:schemas-microsoft-com:asm.v3">
-    <security>
-        <requestedPrivileges>
-            <requestedExecutionLevel level="requireAdministrator" uiAccess="false" />
-        </requestedPrivileges>
-    </security>
-</trustInfo>
-</assembly>
-"#);
-
-    match res.compile() {
-        Err(e) => {
-            write!(std::io::stderr(), "{}", e).unwrap();
-            std::process::exit(1);
-        }
-        Ok(_) => ()
-    }
-}
+use std::io::Write;
+
+fn main() {
+    let mut res = winres::WindowsResource::new();
+    res.set_manifest(
+        r#"
+<assembly xmlns="urn:schemas-microsoft-com:asm.v1" manifestVersion="1.0">
+<trustInfo xmlns="urn:schemas-microsoft-com:asm.v3">
+    <security>
+        <requestedPrivileges>
+            <requestedExecutionLevel level="requireAdministrator" uiAccess="false" />
+        </requestedPrivileges>
+    </security>
+</trustInfo>
+</assembly>
+"#,
+    );
+
+    match res.compile() {
+        Err(e) => {
+            write!(std::io::stderr(), "{}", e).unwrap();
+            std::process::exit(1);
+        }
+        Ok(_) => (),
+    }
+}

src/args.rs

@@ -1,7 +1,7 @@
 use clap::Parser;
 
 #[derive(Parser)]
-#[command(author, version, about, long_about = None)]
+#[command(author, version, about, long_about = None, arg_required_else_help = true)]
 pub struct Args {
     #[arg(short, long, help = "Pid to kill")]
     pub pid: u32,