feat: add alternative priv escalation

thias#123

README.md

@@ -10,7 +10,7 @@ I've Nixified the upstream glim script, so it should work out of the box on syst
 
 Follow the upstream instructions for setting up your USB device.
 
-Then, install glim to your USB by running `nix run github:Liassica/glim-flake`. You can override the theme by adding this repo as a flake input and overriding the 'theme' input.
+Then, install glim to your USB by running `nix run github:Liassica/glim-flake`. You can override the theme or by adding this repo as a flake input and overriding the 'theme' input.
 
 E.g, to use the Breeze GRUB theme:
 

nix/package/default.nix

@@ -11,21 +11,34 @@ let
   cfg = ../../grub2;
 in
 writeShellScriptBin "glim" ''
+  shopt -s expand_aliases
+
   export PATH=${
     lib.makeBinPath [
       util-linux
       coreutils-full
       grub2_efi
       rsync
     ]
-  }:$PATH
+  }:''$PATH
 
   # Check that we are *NOT* running as root
   if [[ `id -u` -eq 0 ]]; then
     echo "ERROR: Don't run as root, use a user with full sudo access."
     exit 1
   fi
 
+  # Use alternative if sudo is not found
+  if [[ ! `which sudo &>/dev/null` ]]; then
+    if which doas &>/dev/null; then
+      alias sudo=doas
+    else
+      sudo () {
+        su -c "$*"
+      }
+    fi
+  fi
+
   # Find GLIM device (use the first if multiple found, you've asked for trouble!)
   USBDEV1=`blkid -L GLIM | head -n 1`