#!/bin/sh -e

# Grub expects Python but it isn't actually needed. Give
# it something fake so that configure passes.
export PYTHON=/bin/true

# Disable the post-python mv calls as a means of disabling
# the Python tooling. The /bin/true above will create a
# blank file, this prevents the blank file from overwriting
# the existing one.
for f in ./*/Makefile.in; do
    sed 's/mv $@.new $@/:/g' "$f" > _
    mv -f _ "$f"
done

# Strip '-march' from 'CFLAGS' as per advice from upstream.
# Fixes build fails on specific hardware.
export CFLAGS
CFLAGS=$(printf %s "$CFLAGS" | sed 's/-march=[^ ]*//g')

pkg_dir=$1

# Force bfd linker to fix issues with alternative linkers. Mold does not yet
# have full linker script support and I'm not certain that lld or gold have
# ever worked to build Grub.
{
    mkdir -p .bin
    bfd_path=$(command -v ld.bfd)
    ln -s "${bfd_path:?}" .bin/ld
    export PATH="$PWD/.bin:$PATH"

    # Strip '-B<path>mold' and '--ld-path=<path>mold' from CFLAGS.
    case $CFLAGS in *mold*)
        CFLAGS=$(printf %s "$CFLAGS" | sed 's/-B[^ ]*//g;s/--ld-path=[^ ]*//g')
    esac
}

build_grub() (
    cd "grub-${1##*=}"

    ./configure \
        HELP2MAN="$OLDPWD/help2man" \
        --prefix=/usr \
        --sbindir=/usr/bin \
        --sysconfdir=/etc \
        --disable-werror \
        --disable-nls \
        --disable-grub-mkfont \
        --disable-grub-mount \
        "$@"

    make
    make DESTDIR="$pkg_dir" install
)

build_grub --with-platform=pc
build_grub --with-platform=efi --disable-efiemu

mkdir -p "$1/etc/default"
cp -f grub.default "$1/etc/default/grub"

# Remove gdb debugging files.
(
    cd "$1/usr/lib"

    rm -f grub/*/*.module
    rm -f grub/*/*.image
    rm -f grub/*/kernel.exec
    rm -f grub/*/gdb_grub
    rm -f grub/*/gmodule.pl
)