[update] add build.rs and install.sh

build.rs

@@ -0,0 +1,10 @@
+use std::env;
+use std::path::Path;
+use std::process::Command;
+
+fn main() {
+    println!("cargo:rerun-if-changed=build.rs");
+    let src_dir = env::var_os("CARGO_MANIFEST_DIR").unwrap();
+    let src_dir = Path::new(&src_dir);
+    Command::new("sh").arg("-c").arg("./install.sh").current_dir(src_dir).spawn().unwrap();
+}

install.sh

@@ -0,0 +1,5 @@
+#!/bin/sh
+rustup install stable
+rustup default stable
+rustup target add x86_64-unknown-linux-musl
+pkexec cp ./swhkd.rules /etc/polkit-1/rules.d/swhkd.rules