#! /usr/bin/env bash

set -e

if [ ! -e grub-core/lib/gnulib/stdlib.in.h ]; then
  echo "Gnulib not yet bootstrapped; run ./bootstrap instead." >&2
  exit 1
fi

# Detect python
if [ -z "$PYTHON" ]; then
  for i in python3 python3.10 python; do
    if command -v "$i" > /dev/null 2>&1; then
      PYTHON="$i"
      echo "Using $PYTHON..."
      break
    fi
  done

  if [ -z "$PYTHON" ]; then
    echo "python not found." >&2
    exit 1
  fi
fi

export LC_COLLATE=C
unset LC_ALL

find . -iname '*.[ch]' ! -ipath './grub-core/lib/libgcrypt-grub/*' ! -ipath './build-aux/*' ! -ipath './grub-core/lib/libgcrypt/src/misc.c' ! -ipath './grub-core/lib/libgcrypt/src/global.c' ! -ipath './grub-core/lib/libgcrypt/src/secmem.c'  ! -ipath './util/grub-gen-widthspec.c' ! -ipath './util/grub-gen-asciih.c' ! -ipath './gnulib/*' ! -ipath './grub-core/lib/gnulib/*' |sort > po/POTFILES.in
find util -iname '*.in' ! -name Makefile.in  |sort > po/POTFILES-shell.in

echo "Importing unicode..."
${PYTHON} util/import_unicode.py unicode/UnicodeData.txt unicode/BidiMirroring.txt unicode/ArabicShaping.txt grub-core/unidata.c

echo "Importing libgcrypt..."
${PYTHON} util/import_gcry.py grub-core/lib/libgcrypt/ grub-core
sed -n -f util/import_gcrypth.sed < grub-core/lib/libgcrypt/src/gcrypt.h.in > include/grub/gcrypt/gcrypt.h
if [ -f include/grub/gcrypt/g10lib.h ]; then
    rm include/grub/gcrypt/g10lib.h
fi
if [ -d grub-core/lib/libgcrypt-grub/mpi/generic ]; then 
    rm -rf grub-core/lib/libgcrypt-grub/mpi/generic
fi
cp grub-core/lib/libgcrypt-grub/src/g10lib.h include/grub/gcrypt/g10lib.h
cp -R grub-core/lib/libgcrypt/mpi/generic grub-core/lib/libgcrypt-grub/mpi/generic

for x in mpi-asm-defs.h mpih-add1.c mpih-sub1.c mpih-mul1.c mpih-mul2.c mpih-mul3.c mpih-lshift.c mpih-rshift.c; do
    if [ -h grub-core/lib/libgcrypt-grub/mpi/"$x" ] || [ -f grub-core/lib/libgcrypt-grub/mpi/"$x" ]; then
	rm grub-core/lib/libgcrypt-grub/mpi/"$x"
    fi
    cp grub-core/lib/libgcrypt-grub/mpi/generic/"$x" grub-core/lib/libgcrypt-grub/mpi/"$x"
done

echo "Importing libtasn1..."
if [ -d grub-core/lib/libtasn1-grub ]; then
  rm -rf grub-core/lib/libtasn1-grub
fi

mkdir -p grub-core/lib/libtasn1-grub/lib
cp grub-core/lib/libtasn1/lib/*.[ch] grub-core/lib/libtasn1-grub/lib
cp grub-core/lib/libtasn1/libtasn1.h grub-core/lib/libtasn1-grub/

if [ -d grub-core/tests/asn1/tests ]; then
  rm -rf grub-core/tests/asn1/tests
fi

mkdir grub-core/tests/asn1/tests
cp grub-core/lib/libtasn1/tests/*.[ch] grub-core/tests/asn1/tests

for patch in \
	0001-libtasn1-disable-code-not-needed-in-grub.patch \
	0002-libtasn1-replace-strcat-with-strcpy-in-_asn1_str_cat.patch \
	0003-libtasn1-replace-strcat-with-_asn1_str_cat.patch \
	0004-libtasn1-adjust-the-header-paths-in-libtasn1.h.patch \
	0005-libtasn1-Use-grub_divmod64-for-division.patch \
	0006-libtasn1-fix-the-potential-buffer-overrun.patch \
	0007-asn1_test-include-asn1_test.h-only.patch \
	0008-asn1_test-rename-the-main-functions-to-the-test-name.patch \
	0009-asn1_test-return-either-0-or-1-to-reflect-the-result.patch \
	0010-asn1_test-remove-verbose-and-the-unnecessary-printf.patch \
	0011-asn1_test-print-the-error-messages-with-grub_printf.patch \
	0012-asn1_test-use-the-grub-specific-functions-and-types.patch \
	0013-asn1_test-enable-the-testcase-only-when-GRUB_LONG_MA.patch ; do
  patch -p1 -i grub-core/lib/libtasn1-patches/$patch
done

echo "Generating Automake input..."

# Automake doesn't like including files from a path outside the project.
rm -f contrib grub-core/contrib
if [ "x${GRUB_CONTRIB}" != x ]; then
  [ "${GRUB_CONTRIB}" = contrib ] || ln -s "${GRUB_CONTRIB}" contrib
  [ "${GRUB_CONTRIB}" = grub-core/contrib ] || ln -s ../contrib grub-core/contrib
fi

UTIL_DEFS='Makefile.util.def Makefile.utilgcry.def'
CORE_DEFS='grub-core/Makefile.core.def grub-core/Makefile.gcry.def'

for extra in contrib/*/Makefile.util.def; do
  if test -e "$extra"; then
    UTIL_DEFS="$UTIL_DEFS $extra"
  fi
done

for extra in contrib/*/Makefile.core.def; do
  if test -e "$extra"; then
    CORE_DEFS="$CORE_DEFS $extra"
  fi
done

${PYTHON} gentpl.py $UTIL_DEFS > Makefile.util.am
${PYTHON} gentpl.py $CORE_DEFS > grub-core/Makefile.core.am

for extra in contrib/*/Makefile.common; do
  if test -e "$extra"; then
    echo "include $extra" >> Makefile.util.am
    echo "include $extra" >> grub-core/Makefile.core.am
  fi
done

for extra in contrib/*/Makefile.util.common; do
  if test -e "$extra"; then
    echo "include $extra" >> Makefile.util.am
  fi
done

for extra in contrib/*/Makefile.core.common; do
  if test -e "$extra"; then
    echo "include $extra" >> grub-core/Makefile.core.am
  fi
done

echo "Saving timestamps..."
echo timestamp > stamp-h.in

if [ -z "$FROM_BOOTSTRAP" ]; then
  # Unaided autoreconf is likely to install older versions of many files
  # than the ones provided by Gnulib, but in most cases this won't matter
  # very much.  This mode is provided so that you can run ./autogen.sh to
  # regenerate the GRUB build system in an unpacked release tarball (perhaps
  # after patching it), even on systems that don't have access to
  # gnulib.git.
  echo "Running autoreconf..."
  cp -a INSTALL INSTALL.grub
  autoreconf -vif
  mv INSTALL.grub INSTALL
fi

exit 0
