#!/bin/sh

set -e
set -x

bootstrapdir=$(mktemp -d -p $PWD bootstrap-XXXXXXXX)

mkdir -p $bootstrapdir/tarballs
mkdir -p $bootstrapdir/tools
mkdir -p $bootstrapdir/sources

mkdir -p $bootstrapdir/usr
mkdir -p $bootstrapdir/usr/lib
mkdir -p $bootstrapdir/usr/bin
mkdir -p $bootstrapdir/etc
mkdir -p $bootstrapdir/var
mkdir -p $bootstrapdir/run
mkdir -p $bootstrapdir/tmp
mkdir -p $bootstrapdir/home
mkdir -p $bootstrapdir/boot
ln -s lib $bootstrapdir/usr/lib64
ln -s usr/lib $bootstrapdir/lib64
ln -s usr/lib $bootstrapdir/lib
ln -s bin $bootstrapdir/usr/sbin
ln -s usr/bin $bootstrapdir/bin
ln -s usr/bin $bootstrapdir/sbin


bootstrap_target=x86_64-rasde-linux-musl
cores=$(nproc)

cd $bootstrapdir/tarballs
curl -L                                                                      \
     -O  https://sourceware.org/pub/binutils/releases/binutils-2.47.tar.zst  \
     -O  https://ftpmirror.gnu.org/gnu/gcc/gcc-16.2.0/gcc-16.2.0.tar.xz      \
     -O  https://cdn.kernel.org/pub/linux/kernel/v7.x/linux-7.2.2.tar.xz     \
     -O  https://musl.libc.org/releases/musl-1.2.6.tar.gz                    \
     -O  https://ftpmirror.gnu.org/pub/gnu/m4/m4-1.4.21.tar.xz               \
     -O  https://ftpmirror.gnu.org/pub/gnu/ncurses/ncurses-6.6.tar.gz        \
     -O  https://ftpmirror.gnu.org/gnu/bash/bash-5.3.tar.gz                  \
     -O  https://ftpmirror.gnu.org/gnu/coreutils/coreutils-9.11.tar.xz       \
     -O  https://ftpmirror.gnu.org/pub/gnu/diffutils/diffutils-3.12.tar.xz   \
     -O  http://ftp.astron.com/pub/file/file-5.48.tar.gz                     \
     -O  https://ftpmirror.gnu.org/pub/gnu/findutils/findutils-4.11.0.tar.xz \
     -O  https://ftpmirror.gnu.org/pub/gnu/gawk/gawk-5.4.1.tar.xz            \
     -O  https://ftpmirror.gnu.org/pub/gnu/grep/grep-3.12.tar.xz             \
     -O  https://ftpmirror.gnu.org/gnu/gzip/gzip-1.14.tar.xz                 \
     -O  https://ftpmirror.gnu.org/pub/gnu/make/make-4.4.1.tar.lz            \
     -O  https://ftpmirror.gnu.org/pub/gnu/patch/patch-2.8.tar.xz            \
     -O  https://ftpmirror.gnu.org/pub/gnu/sed/sed-4.10.tar.xz               \
     -O  https://ftpmirror.gnu.org/gnu/tar/tar-1.35.tar.xz                   \
     -O  https://ftpmirror.gnu.org/gnu/mpfr/mpfr-4.2.2.tar.xz                \
     -O  https://ftpmirror.gnu.org/pub/gnu/gmp/gmp-6.3.0.tar.xz              \
     -O  https://ftpmirror.gnu.org/gnu/mpc/mpc-1.4.1.tar.xz                  \
     -O  https://tukaani.org/xz/xz-5.8.3.tar.gz

for x in $(find $bootstrapdir/tarballs); do
    tar xf $x -C $bootstrapdir/sources
done

export PATH="$bootstrapdir/tools/bin:$PATH"

cd $bootstrapdir/sources/binutils*
mkdir build
cd build
../configure --prefix=$bootstrapdir/tools \
             --with-sysroot=$bootstrapdir \
             --target=$bootstrap_target   \
             --disable-nls                \
             --enable-gprofng=no          \
             --disable-werror             \
             --enable-new-dtags           \
             --enable-default-hash-style=gnu
make -j$cores
make install -j$cores

cd $bootstrapdir/sources/gcc*
mkdir build
cd build
../configure                     \
    --target=$bootstrap_target   \
    --prefix=$bootstrapdir/tools \
    --with-sysroot=$bootstrapdir \
    --with-newlib                \
    --without-headers            \
    --enable-default-pie         \
    --enable-default-ssp         \
    --disable-nls                \
    --disable-shared             \
    --disable-multilib           \
    --disable-threads            \
    --disable-libatomic          \
    --disable-libgomp            \
    --disable-libquadmath        \
    --disable-libssp             \
    --disable-libvtv             \
    --disable-libstdcxx          \
    --enable-languages=c,c++
make -j$cores
make install -j$cores

cd $bootstrapdir/sources/linux*
make mrproper -j$cores
make headers -j$cores
make headers_install -j$cores
cp -r ./usr/include $bootstrapdir/usr

cd $bootstrapdir/sources/musl*
./configure --prefix=/usr
make -j$cores
make DESTDIR=$bootstrapdir install -j$cores
ln -s ../lib/libc.so $bootstrapdir/usr/bin/ldd

cd $bootstrapdir/sources/gcc*
mkdir build-libstdcpp
cd build-libstdcpp
../libstdc++-v3/configure      \
    --host=$bootstrap_target   \
    --build=$(../config.guess) \
    --prefix=/usr              \
    --disable-multilib         \
    --disable-nls              \
    --disable-libstdcxx-pch    \
    --with-gxx-include-dir=/tools/$boostrap_target/include/c++/16.2.0
make -j$cores
make DESTDIR=$bootstrapdir install -j$cores

cd $bootstrapdir/sources/m4*
./configure --prefix=/usr   \
            --host=$bootstrap_target \
            --build=$(build-aux/config.guess)
make -j$cores
make DESTDIR=$bootstrapdir install j$cores

cd $bootstrapdir/sources/ncurses*
mkdir build
pushd build
  ../configure --prefix=$bootstrapdir/tools AWK=gawk
  make -C include
  make -C progs tic
  install progs/tic $bootstrapdir/tools/bin
popd
./configure --prefix=/usr                \
            --host=$bootstrap_target     \
            --build=$(./config.guess)    \
            --mandir=/usr/share/man      \
            --with-manpage-format=normal \
            --with-shared                \
            --with-normal                \
            --disable-widenc             \
            --with-cxx-shared            \
            --without-debug              \
            --without-ada                \
            --disable-stripping          \
            AWK=gawk
make -j$cores
make DESTDIR=$bootstrapdir install -j$cores
make distclean
./configure --prefix=/usr                \
            --host=$bootstrap_target     \
            --build=$(./config.guess)    \
            --mandir=/usr/share/man      \
            --with-manpage-format=normal \
            --with-shared                \
            --enable-widenc              \
            --with-cxx-shared            \
            --without-debug              \
            --without-ada                \
            --disable-stripping          \
            AWK=gawk
make -j$cores
make DESTDIR=$bootstrapdir install -j$cores
ln -sf libncurses.so $bootstrapdir/usr/lib/libcurses.so
ln -sf libncurses.a $bootstrapdir/usr/lib/libcurses.a

cd $bootstrapdir/sources/bash*
./configure --prefix=/usr                      \
            --build=$(sh support/config.guess) \
            --host=$bootstrap_target           \
            --without-bash-malloc
make -j$cores
make DESTDIR=$bootstrapdir install -j$cores
ln -s bash $bootstrapdir/bin/sh

cd $bootstrapdir/sources/coreutils*
./configure --prefix=/usr                     \
            --host=$bootstrap_target          \
            --build=$(build-aux/config.guess) \
            --enable-install-program=hostname \
            --enable-no-install-program=kill,uptime
make -j$cores
make DESTDIR=$bootstrapdir install -j$cores

cd $bootstrapdir/sources/diffutils*
./configure --prefix=/usr                 \
            --host=$bootstrap_target      \
            gl_cv_func_strcasecmp_works=y \
            --build=$(./build-aux/config.guess)
make -j$cores
make DESTDIR=$bootstrapdir install -j$cores

cd $bootstrapdir/sources/file*
mkdir build
pushd build
  ../configure --disable-bzlib      \
               --disable-libseccomp \
               --disable-xzlib      \
               --disable-zlib
  make
popd
./configure --prefix=/usr --host=$bootstrap_target --build=$(./config.guess)
make FILE_COMPILE=$(pwd)/build/src/file
make DESTDIR=$bootstrapdir install
rm -v $bootstrapdir/usr/lib/libmagic.la

cd $bootstrapdir/sources/findutils*
./configure --prefix=/usr                   \
            --localstatedir=/var/lib/locate \
            --host=$bootstrap_target        \
            --build=$(build-aux/config.guess)
make -j$cores
make DESTDIR=$bootstrapdir install -j$cores

cd $bootstrapdir/sources/gawk*
./configure --prefix=/usr            \
            --host=$bootstrap_target \
            --build=$(build-aux/config.guess)
make -j$cores
make DESTDIR=$bootstrapdir install -j$cores

cd $bootstrapdir/sources/grep*
./configure --prefix=/usr   \
            --host=$bootstrap_target \
            --build=$(./build-aux/config.guess)
make -j$cores
make DESTDIR=$bootstrapdir install -j$cores

cd $bootstrapdir/sources/gzip*
./configure --prefix=/usr --host=$bootstrap_target
make -j$cores
make DESTDIR=$bootstrapdir install -j$cores

cd $bootstrapdir/sources/make*
./configure --prefix=/usr   \
            --host=$bootstrap_target \
            --build=$(build-aux/config.guess)
make -j$cores
make DESTDIR=$bootstrapdir install -j$cores

cd $bootstrapdir/sources/patch*
./configure --prefix=/usr   \
            --host=$bootstrap_target \
            --build=$(build-aux/config.guess)
make -j$cores
make DESTDIR=$bootstrapdir install -j$cores

cd $bootstrapdir/sources/sed*
./configure --prefix=/usr   \
            --host=$bootstrap_target \
            --build=$(build-aux/config.guess)
make -j$cores
make DESTDIR=$bootstrapdir install -j$cores

cd $bootstrapdir/sources/tar*
./configure --prefix=/usr   \
            --host=$bootstrap_target \
            --build=$(build-aux/config.guess)
make -j$cores
make DESTDIR=$bootstrapdir install -j$cores

cd $bootstrapdir/sources/xz*
./configure --prefix=/usr   \
            --host=$bootstrap_target \
            --build=$(build-aux/config.guess)
make -j$cores
make DESTDIR=$bootstrapdir install -j$cores
rm -v $bootstrapdir/usr/lib/liblzma.la

cd $bootstrapdir/sources/binutils*
sed '6031s/$add_dir//' -i ltmain.sh
rm -rf build
mkdir build
cd build
../configure                   \
    --prefix=/usr              \
    --build=$(../config.guess) \
    --host=$bootstrap_target   \
    --disable-nls              \
    --enable-shared            \
    --enable-gprofng=no        \
    --disable-werror           \
    --enable-64-bit-bfd        \
    --enable-new-dtags         \
    --enable-default-hash-style=gnu
make -j$cores
make DESTDIR=$bootstrapdir install -j$cores
rm -v $bootstrapdir/usr/lib/lib{bfd,ctf,ctf-nobfd,opcodes,sframe}.la

cd $bootstrapdir/sources/gcc*
rm -rf build
mkdir build
cd build

../configure                           \
    --build=$(../config.guess)         \
    --host=$bootstrap_target           \
    --target=$bootstrap_target         \
    --prefix=/usr                      \
    --with-build-sysroot=$bootstrapdir \
    --enable-default-pie               \
    --enable-default-ssp               \
    --disable-nls                      \
    --disable-multilib                 \
    --disable-libatomic                \
    --disable-libgomp                  \
    --disable-libquadmath              \
    --disable-libsanitizer             \
    --disable-libssp                   \
    --disable-libvtv                   \
    --enable-languages=c,c++           \
    LDFLAGS_FOR_TARGET=-L$PWD/$bootstrap_target/libgcc
make -j$cores
make DESTDIR=$bootstrapdir install -j$cores
ln -sv gcc $bootstrapdir/usr/bin/cc