Build: use $SUDO_[UG]ID in build-image-* instead of relying on makeall

Author: https://github.com/jcs
Commit: https://github.com/SerenityOS/serenity/commit/0fa38e4a4a5
Pull-request: https://github.com/SerenityOS/serenity/pull/1080

Kernel/build-image-grub.sh

@@ -23,7 +23,7 @@ echo "using grub-install at ${grub}"
 
 echo "setting up disk image..."
 dd if=/dev/zero of=_disk_image bs=1M count="${DISK_SIZE:-600}" status=none || die "couldn't create disk image"
-chown 1000:1000 _disk_image || die "couldn't adjust permissions on disk image"
+chown "$SUDO_UID":"$SUDO_GID" _disk_image || die "couldn't adjust permissions on disk image"
 echo "done"
 
 printf "creating loopback device... "

Kernel/build-image-qemu.sh

@@ -16,7 +16,7 @@ if [ "$(uname -s)" = "Darwin" ]; then
 fi
 echo "setting up disk image..."
 qemu-img create _disk_image "${DISK_SIZE:-600}"m || die "couldn't create disk image"
-chown "$build_user":"$build_group" _disk_image || die "couldn't adjust permissions on disk image"
+chown "$SUDO_UID":"$SUDO_GID" _disk_image || die "couldn't adjust permissions on disk image"
 echo "done"
 
 printf "creating new filesystem... "

Kernel/makeall.sh

@@ -4,12 +4,6 @@ set -e
 script_path=$(cd -P -- "$(dirname -- "$0")" && pwd -P)
 cd "$script_path"
 
-# Get user and group details for setting qemu disk image ownership
-build_user=$(id -u)
-build_group=$(id -g)
-export build_user
-export build_group
-
 fast_mode=
 while [ "$1" != "" ]; do
     case $1 in