use umask 022 by default so rootfs have correct permissions

Author: poscat0x04

src/main.rs

@@ -18,6 +18,7 @@ use console::{style, user_attended};
 use dotenvy::dotenv;
 use std::process;
 use std::{path::Path, process::Command};
+use libc;
 
 use crate::actions::BuildSettings;
 use crate::common::*;
@@ -99,6 +100,9 @@ fn update_tree(path: &Path, branch: Option<&String>, rebase_from: Option<&String
 }
 
 fn main() -> Result<()> {
+    // set umask to 022 to ensure correct permissions on rootfs
+    unsafe { libc::umask(libc::S_IWGRP | libc:: S_IWOTH); }
+
     // source .env file, ignore errors
     dotenv().ok();