#! /bin/sh

# We turn the configure-built build-$foo/lookups/Makefile.predynamic into Makefile

input=lookups/Makefile.predynamic
target=lookups/Makefile
defs_source=Makefile
tag_marker='MAGIC-TAG-MODS-OBJ-RULES-GO-HERE'

tab='	'
if grep -q "^LOOKUP.*=[ $tab]*2" "$defs_source"
then
  # we have work to do
else
  echo "No dynamic module loading support"
  cp "$input" "$target"
  exit 0
fi

if grep -q "^CFLAGS_DYNAMIC[ $tab]*=" "$defs_source"
then
  # we have a definition, we're good to go
else
  echo >&2 "Missing CFLAGS_DYNAMIC inhibits building dynamic module lookup"
  exit 1
fi

tmp="$target.t"

want_dynamic() {
  local dyn_name="$1"
  grep -q "^LOOKUP_${dyn_name}[ $tab]*=[ $tab]*2" "$defs_source"
}

want_at_all() {
  local want_name="$1"
  grep -q "^LOOKUP_${want_name}[ $tab]*=[ $tab]*." "$defs_source"
}

emit_module_rule() {
  local lookup_name="$1"
  local mod_name
  if [ "${lookup_name%:*}" = "$lookup_name" ]
  then
    mod_name=$(echo $lookup_name | tr A-Z a-z)
  else
    mod_name="${lookup_name#*:}"
    lookup_name="${lookup_name%:*}"
  fi

  if want_dynamic "$lookup_name"
  then
    echo "MODS += ${mod_name}.so"
    echo "LOOKUP_${mod_name}_INCLUDE = \$(LOOKUP_${lookup_name}_INCLUDE)"
    echo "LOOKUP_${mod_name}_LIBS = \$(LOOKUP_${lookup_name}_LIBS)"
  elif want_at_all "$lookup_name"
  then
    echo "OBJ += ${mod_name}.o"
  fi
}

exec 5>&1
exec > "$tmp"

sed -n "1,/$tag_marker/p" < "$input"

for name_mod in \
    CDB DBM:dbmdb DNSDB DSEARCH IBASE LSEARCH MYSQL NIS NISPLUS ORACLE \
    PASSWD PGSQL SQLITE TESTDB WHOSON
do
  emit_module_rule $name_mod
done

if want_at_all LDAP
then
  echo "OBJ += ldap.o"
fi

sed -n "/$tag_marker/,\$p" < "$input"

exec >&5
mv "$tmp" "$target"


# vim: set ft=sh sw=2 :