#!/bin/sh -efu

DESTDIR="${DESTDIR:-/}"
pkglibdir="${pkglibdir:-/usr/lib/rpm}"

RPMRC="${1:-rpmrc}"
MACROS="${2:-macros}"
PLATFORM="${3:-platform}"

if grep /share/ $PLATFORM > /dev/null 2>&1 ; then
    DEFAULTDOCDIR='%{_usr}/share/doc'
else
    DEFAULTDOCDIR='%{_usr}/doc'
fi

#TEMPRC="/tmp/rpmrc.$$"
#cat << E_O_F > $TEMPRC
#include:	$RPMRC
#macrofiles:	$MACROS
#E_O_F
#
#RPM="./rpm --rcfile $TEMPRC"
RPM=rpm

arch="`$RPM --eval '%{_target_cpu}'`"
VENDOR="`$RPM --eval '%{_vendor}'`"
OS="`$RPM --eval '%{_os}'`"
RPMRC_GNU="`$RPM --eval '%{_gnu}'`"
target_platform="`$RPM --eval '%{?_gnu:%undefine _gnu}%{_target_platform}'`"
target="`$RPM --eval '%{_target}'`"

case "$arch" in
  i[3456]86|k6|athlon|athlon_xp|pentium[234])
    SUBSTS='s,\(i[3456]86\|k6\|athlon_xp\|athlon\|pentium[234]\),i386, s,\(i[3456]86\|k6\|athlon_xp\|athlon\|pentium[234]\),i486, s,\(i[3456]86\|k6\|athlon_xp\|athlon\|pentium[234]\),i586, s,\(i[3456]86\|k6\|athlon_xp\|athlon\|pentium[234]\),i686, s,\(i[3456]86\|k6\|athlon_xp\|athlon\|pentium[234]\),k6, s,\(i[3456]86\|k6\|athlon_xp\|athlon\|pentium[234]\),athlon, s,\(i[3456]86\|k6\|athlon_xp\|athlon\|pentium[234]\),athlon_xp, s,\(i[3456]86\|k6\|athlon_xp\|athlon\|pentium[234]\),pentium2, s,\(i[3456]86\|k6\|athlon_xp\|athlon\|pentium[234]\),pentium3, s,\(i[3456]86\|k6\|athlon_xp\|athlon\|pentium[234]\),pentium4, s,\(i[3456]86\|k6\|athlon_xp\|athlon\|pentium[234]\),noarch,'
    ;;
  aarch64)
    SUBSTS='s,aarch64,aarch64, s,aarch64,noarch,'
    ;;
  alpha*)
    SUBSTS='s,alpha,alpha, s,alpha,alphaev5, s,alpha,alphaev56, s,alpha,alphapca56, s,alpha,alphaev6, s,alpha,alphaev67,'
    ;;
  armv8*|armv7*)
    SUBSTS='s,arm.*,armh, s,arm.*,armv7l, s,arm.*,armv8l, s,arm.*,noarch,'
    ;;
  arm*)
    SUBSTS='s,arm.*,arm, s,arm.*,armv3l, s,arm.*,armv4l, s,arm.*,armv5l, s,arm.*,armv5tel, s,arm.*,armv5tejl, s,arm.*,armv6l, s,arm.*,noarch,'
    ;;
  e2k*)
    SUBSTS='s,e2k.*,e2k, s,e2k.*,e2kv4, s,e2k.*,e2kv5, s,e2k.*,e2kv6, s,e2k.*,noarch,'
    ;;
  mips)
    SUBSTS='s,mips,mips, s,mips,noarch,'
    ;;
  mipsel)
    SUBSTS='s,mipsel,mipsel, s,mipsel,noarch,'
    ;;
  mipsn32)
    SUBSTS='s,mipsn32,mipsn32, s,mipsn32,noarch,'
    ;;
  mipsn32el)
    SUBSTS='s,mipsn32el,mipsn32el, s,mipsn32el,noarch,'
    ;;
  mips64)
    SUBSTS='s,mips64,mips64, s,mips64,noarch,'
    ;;
  mips64el)
    SUBSTS='s,mips64el,mips64el, s,mips64el,noarch,'
    ;;
  s390x)
    SUBSTS='s,s390x,s390x, s,s390x,noarch,'
    ;;
  sparc*)
    SUBSTS='s,sparc\(64\|v9\),sparc, s,sparc64,sparcv9,;s,sparc\([^v]\|$\),sparcv9\1, s,sparcv9,sparc64,;s,sparc\([^6]\|$\),sparc64\1,'
    ;;
  ppc64le)
    SUBSTS='s,ppc64le,ppc64le, s,ppc64le,noarch,'
    ;;
  powerpc*|ppc*)
    SUBSTS='s,ppc64,ppc, s,ppc\([^6]\|$\),ppc64\1,'
    ;;
  riscv64)
    SUBSTS='s,riscv64,riscv64, s,riscv64,noarch,'
    ;;
  x86_64)
    SUBSTS='s,x86_64,x86_64, s,x86_64,noarch,'
    ;;
  *)
    SUBSTS='y___'
    ;;
esac

for SUBST in $SUBSTS ; do
  ARCH=`echo $arch | sed -e $SUBST`
  LIBSUFF=
  POINTER_SIZE=32

  PPD="${DESTDIR}/${pkglibdir}/${ARCH}-${VENDOR}-${OS}"

  [ -d $PPD ] || mkdir $PPD

  RPMRC_OPTFLAGS="`sed -n 's/^optflags: '$ARCH' //p' $RPMRC`"
  RPMRC_OPTFLAGS="`echo $RPMRC_OPTFLAGS | sed -e 's, ,\ ,g'`"

  ARCH_INSTALL_POST='%{nil}'
  case "${ARCH}-${OS}" in
    aarch64-linux)
	    LIBSUFF=64
	    POINTER_SIZE=64
	    ;;
    mipsn32-linux*)
	    LIBSUFF=32
	    ;;
    mipsn32el-linux*)
	    LIBSUFF=32
	    ;;
    mips64-linux*)
	    LIBSUFF=64
	    POINTER_SIZE=64
	    ;;
    mips64el-linux*)
	    LIBSUFF=64
	    POINTER_SIZE=64
	    ;;
    ppc64le-linux*)
	    LIBSUFF=64
	    POINTER_SIZE=64
	    ;;
    riscv64-linux)
	    LIBSUFF=64
	    POINTER_SIZE=64
	    ;;
    s390x-linux)
	    LIBSUFF=64
	    POINTER_SIZE=64
	    ;;
    sparc64-linux)
	    LIBSUFF=64
	    POINTER_SIZE=64
	    ;;
    x86_64-linux)
	    LIBSUFF=64
	    POINTER_SIZE=64
	    ;;
    e2k*-linux)
	    LIBSUFF=64
	    POINTER_SIZE=64
	    ;;
    noarch-linux)
	    POINTER_SIZE=
  esac

  VENDORSED=
  case $VENDOR in
  alt)
    VENDORSED='-e s,^@alt@,,'
    ;;
  pld)
    VENDORSED='-e s,^@pld@,,'
    ;;
  mandrake)
    VENDORSED='-e s,^@mandrake@,,'
    RPMRC_OPTFLAGS="`echo $RPMRC_OPTFLAGS | sed -e s/i386/i686/`"
    ;;
  conectiva)
    VENDORSED='-e s,^@conectiva@,,'
    ;;
  redhat)
    VENDORSED='-e s,^@redhat@,,'
    ;;
  esac

  LIBSUFF_EXISTS=@
  [ "$LIBSUFF" = '' ] || LIBSUFF_EXISTS=

  ARCH_ILP32=
  ARCH_LP64=
  case "$POINTER_SIZE" in
	32) ARCH_ILP32=1 ;;
	64) ARCH_LP64=1 ;;
  esac

  cat $PLATFORM \
  | sed -e "s,@RPMRC_OPTFLAGS@,$RPMRC_OPTFLAGS," \
	-e "s,@RPMRC_ARCH@,$ARCH," \
	-e "s,@RPMRC_GNU@,$RPMRC_GNU," \
	-e "s,@LIBSUFF_DEFINITION@,${LIBSUFF:-%nil}," \
	-e "s,@LIBSUFF@,$LIBSUFF," \
	-e "s,@LIBSUFF_EXISTS@,$LIBSUFF_EXISTS," \
	-e "s,@POINTER_SIZE@,$POINTER_SIZE," \
	-e "s,@ARCH_ILP32@,$ARCH_ILP32," \
	-e "s,@ARCH_LP64@,$ARCH_LP64," \
	-e "s,@ARCH_INSTALL_POST@,$ARCH_INSTALL_POST," \
	-e "s,@DEFAULTDOCDIR@,$DEFAULTDOCDIR," \
	-e '/	$/d' \
	$VENDORSED \
  | grep -v '^@' \
  > ${PPD}/macros
done

#rm $TEMPRC