AC_INIT(http_getter.pl.in)

PACKAGE=helm_http_getter
MAJOR_VERSION=0
MINOR_VERSION=0
MICRO_VERSION=2
VERSION=$MAJOR_VERSION.$MINOR_VERSION.$MICRO_VERSION

DEFAULT_HELM_LIB_DIR=/usr/local/helm/lib

AC_ARG_ENABLE(
	defaults,
	[  --enable-defaults[=ARG] if yes then use defaults (don't ask user) [default=auto]],
	USE_DEFAULTS=$enableval,
	USE_DEFAULTS=auto
)

if test "x$prefix" != xNONE; then
  RESOLVED_PREFIX=$prefix
else
  RESOLVED_PREFIX=$ac_default_prefix
fi

if test "x$exec_prefix" != xNONE; then
  RESOLVED_EXEC_PREFIX=$exec_prefix
else
  RESOLVED_EXEC_PREFIX=$RESOLVED_PREFIX
fi

if test $USE_DEFAULTS = auto; then
	AC_CHECK_PROG(HAVE_HELM_CONFIG, helm-config, yes, no)
	if test $HAVE_HELM_CONFIG = yes; then
		HELM_LIB_DIR=`helm-config --lib-dir`
	else
		USE_DEFAULTS=no
	fi
fi

if test $USE_DEFAULTS = no; then
	echo
	echo "\`helm-config' is not installed (or I can't find it in your path)."
	echo "Please, insert the lib directory HELM..."
	echo
	echo -n "[[$DEFAULT_HELM_LIB_DIR]] ? "
	read HELM_LIB_DIR
	if test "x$HELM_LIB_DIR" = "x"; then
		HELM_LIB_DIR=$DEFAULT_HELM_LIB_DIR
	fi
elif test $USE_DEFAULTS = yes; then
	HELM_LIB_DIR=$DEFAULT_HELM_LIB_DIR
fi

AC_MSG_CHECKING(for $HELM_LIB_DIR/configuration.pl)
if test -f $HELM_LIB_DIR/configuration.pl; then
	AC_MSG_RESULT(ok)
else
	AC_MSG_RESULT(no)
	AC_MSG_ERROR(please check your installation)
fi

AC_PATH_PROG(PERL_BINARY,perl,no)
if test $PERL_BINARY = no ; then
   AC_MSG_ERROR(Could not find perl)
fi

dnl Perl modules checks
PERL_MODS="HTTP::Daemon HTTP::Status HTTP::Request LWP::UserAgent DB_File Compress::Zlib"
PERL_INC=`perl -e 'print(join(" ",@INC))'`
for perl_mod in $PERL_MODS; do
	AC_MSG_CHECKING("for perl module: $perl_mod")
	perl_mod_file=`echo $perl_mod | sed -e 's/::/\//' -e 's/$/\.pm/'`
	module_found="false"
	for perl_lib_dir in $PERL_INC; do
		if test -f "$perl_lib_dir/$perl_mod_file"; then
			module_found="true"
			AC_MSG_RESULT("found in $perl_lib_dir")
			break
		fi
	done
	if test "$module_found" != "true"; then
		AC_MSG_ERROR("not found")
	fi
done

AC_SUBST(PACKAGE)
AC_SUBST(VERSION)
AC_SUBST(RESOLVED_PREFIX)
AC_SUBST(RESOLVED_EXEC_PREFIX)
AC_SUBST(HELM_LIB_DIR)
AC_SUBST(PERL_BINARY)

AC_OUTPUT([
  Makefile
  http_getter.pl
  helm_http_getter.spec
], chmod +x http_getter.pl)