#! /bin/sh

set -ex

srcdir="$(dirname "$0")"
test -z "$srcdir" && srcdir=.

cd "$srcdir"

STB_COMMIT_HASH=f4a71b13373436a2866c5d68f8f80ac6f0bc1ffe
STB_IMAGE_H_HASH=9053a86ea3fab378ad42c740bbc5003c7c2038a466da1446e1d9b943178d131c9add2d41fca23149cc55381a94ba32c4d29f5ce09d80e19809e067bac2ee7b92

FREESTANDING_TOOLCHAIN_COMMIT_HASH=2ab7a489652291d430a7b693430c97ea9cb7bcbf
FREESTANDING_TOOLCHAIN_HASH=558c0a1f4e10aeb32e1331e0139a571cde648fe281b85a2163e1f4b5fe639cec1ba87906d24dcfe52b62540290beac71a2ba3e3c20686933c969b60f122826a5

FLANTERM_COMMIT_HASH=545ab1faa8ba7493ae7a43064d520e402ad308b5

FREESTANDING_HEADERS_COMMIT_HASH=dd3abd2d7147efc4170dff478d3b7730bed14147

LIBGCC_BINARIES_COMMIT_HASH=7e1775311640070f3157a332c6ad5bce1c47ad56

LIMINE_EFI_COMMIT_HASH=c7d42cae902fc7e3f0b20b428186e8d9b1e9f5b5

TINF_COMMIT_HASH=57ffa1f1d5e3dde19011b2127bd26d01689b694b

clone_repo_commit() {
    [ -d $2 ] && (
        set -e
        if [ -f $2/.git ]; then
            git -C $2 checkout $3 || (
                set -e
                rm -rf $2
            )
        fi
    )
    [ -d $2 ] || (
        set -e
        git clone $1 $2
        git -C $2 checkout $3
    )
}

clone_repo_commit https://github.com/mintsuki/flanterm.git common/flanterm $FLANTERM_COMMIT_HASH
clone_repo_commit https://github.com/mintsuki/freestanding-headers.git freestanding-headers $FREESTANDING_HEADERS_COMMIT_HASH
clone_repo_commit https://github.com/mintsuki/libgcc-binaries.git libgcc-binaries $LIBGCC_BINARIES_COMMIT_HASH
clone_repo_commit https://github.com/limine-bootloader/limine-efi.git limine-efi $LIMINE_EFI_COMMIT_HASH
clone_repo_commit https://github.com/jibsen/tinf.git tinf $TINF_COMMIT_HASH

########################################################
########################################################

[ -f common/stb/stb_image.h ] && (
    set -e
    b2sum common/stb/stb_image.h | grep $STB_IMAGE_H_HASH >/dev/null 2>&1 || (
        set -e
        rm -f common/stb/stb_image.h
    )
)
[ -f common/stb/stb_image.h ] || (
    set -e
    curl -Lo common/stb/stb_image.h https://github.com/nothings/stb/raw/$STB_COMMIT_HASH/stb_image.h
    patch -p0 < common/stb_image.patch
    rm -f common/stb/stb_image.h.orig
)

########################################################
########################################################

mkdir -p decompressor/tinf
cp tinf/src/tinf.h tinf/src/tinflate.c tinf/src/tinfgzip.c decompressor/tinf/
patch -p0 < decompressor/tinf.patch

########################################################
########################################################

[ -f freestanding-toolchain ] && (
    set -e
    b2sum freestanding-toolchain | grep $FREESTANDING_TOOLCHAIN_HASH >/dev/null 2>&1 || (
        set -e
        rm -f freestanding-toolchain
    )
)
[ -f freestanding-toolchain ] || (
    set -e
    curl -Lo freestanding-toolchain https://github.com/mintsuki/freestanding-toolchain/raw/$FREESTANDING_TOOLCHAIN_COMMIT_HASH/freestanding-toolchain
    chmod +x freestanding-toolchain
)

########################################################
########################################################

autoreconf -fvi -Wall

# Older versions of autoreconf have a bug where they do not
# install auxiliary files, sometimes... Check if that is the
# case and work around...
for auxfile in config.guess config.sub install-sh; do
    if ! [ -f build-aux/$auxfile ]; then
        mkdir -p build-aux
        cp -v "$(automake --print-libdir)/$auxfile" build-aux/
    fi
done