fix: optimise installer for edge cases

in Go container, `sudo ./build.sh --install` fails to inherit
environment variables and can't find Go installation. `sudo` must be
omitted in that case.

Author: jm33-m0

core/build.sh

@@ -412,7 +412,7 @@ do_install() {
   # set capabilities for cc and setup wireguard runtime dir
   setcap cap_net_admin=eip "$data_dir/emp3r0r-cc" || error "setcap"
   mkdir -p /var/run/wireguard || error "mkdir wireguard"
-  chown "${SUDO_USER:-$USER}":"${SUDO_USER:-$USER}" /var/run/wireguard || error "chown wireguard"
+  chown "$(id -nu):$(id -ng)" /var/run/wireguard || error "chown wireguard"
 
   # tmpfiles.d entry to persist the directory
   if [[ -d "/etc/tmpfiles.d" ]]; then
@@ -555,7 +555,6 @@ case "$1" in
     exit 0
   fi
   error "install failed"
-  exit 0
 
   ;;
 

install.sh

@@ -122,6 +122,10 @@ cd emp3r0r-source/core || error "Failed to enter core directory"
 warn "Building and installing emp3r0r $tag (this may take a while)..."
 # build.sh will handle zig and other internal dependencies
 export TAG="$tag"
-GOROOT="$GOROOT" PATH="$PATH" GOTOOLCHAIN="$GOTOOLCHAIN" sudo ./build.sh --install || error "Build and installation failed"
+if "$EUID" -eq 0; then
+  ./build.sh --install || error "Build and installation failed"
+else
+  sudo ./build.sh --install || error "Build and installation failed"
+fi
 
 info "emp3r0r installed successfully!"