# Process this file with autoconf to produce a configure script.
#
# Copyright (C) 2013, 2018  Patrick McDermott
#
# This file is part of opkbuild.
#
# opkbuild is free software: you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# opkbuild is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with opkbuild.  If not, see <http://www.gnu.org/licenses/>.

AC_INIT([opkbuild], [4.2.2],
	[mailto:proteanos-dev@lists.proteanos.com], [opkbuild],
	[http://www.proteanos.com/dev/opkbuild/])
AC_SUBST([PACKAGE_DESCRIPTION], ['opkbuild'])
AC_CONFIG_AUX_DIR([build-aux])
AC_REQUIRE_AUX_FILE([tap-driver.sh])
AC_CONFIG_SRCDIR([src/opkbuild.sh])

AM_INIT_AUTOMAKE([gnu check-news dist-bzip2 dist-xz subdir-objects])
AM_SILENT_RULES([yes])

AM_CONDITIONAL([IN_GIT],
	[test -d "${srcdir}/.git" && command -v git >/dev/null 2>&1])

AC_ARG_WITH(
	[sh],
	[AS_HELP_STRING([--with-sh=PATH],
		[POSIX-conformant shell with `local' and 64-bit arithmetic])],
	dnl This `dnl' is needed to workaround Vim syntax highlighting.
	[
		case "${withval}" in
			'yes'|'')
				AC_MSG_ERROR([--with-sh requires an argument])
				;;
			'no')
				AC_MSG_ERROR([sh is required])
				;;
			*)
				SH="${withval}"
				AC_SUBST([SH])
				;;
		esac
	],
	[
		AC_PATH_PROG([SH], [sh])
		if test -z "${SH}"; then
			AC_MSG_ERROR([sh not found])
		fi
	]
)
AC_MSG_CHECKING([whether ${SH} supports \`local'])
if test x"$(${SH} -c 'f() { local v=2; }; v=1; f; printf "%d\n" "${v}";' \
		2>&AS_MESSAGE_LOG_FD)" = x'1'; then
	AC_MSG_RESULT([yes])
else
	AC_MSG_RESULT([no])
	AC_MSG_ERROR([a shell with \`local' is required])
fi
AC_MSG_CHECKING([whether ${SH} supports 64-bit arithmetic])
if test x"$(${SH} -c 'printf "%s\n" "$((2 << 61))"' 2>&AS_MESSAGE_LOG_FD)" = \
		x'4611686018427387904'; then
	AC_MSG_RESULT([yes])
else
	AC_MSG_RESULT([no])
	AC_MSG_ERROR([a shell with 64-bit arithmetic is required])
fi

AC_ARG_WITH(
	[fakeroot],
	[AS_HELP_STRING([--with-fakeroot=PATH], [path to fakeroot utility])],
	[
		case "${withval}" in
			'yes'|'')
				AC_MSG_ERROR(
					[--with-fakeroot requires an argument])
				;;
			'no')
				AC_MSG_ERROR([fakeroot is required])
				;;
			*)
				FAKEROOT="${withval}"
				AC_SUBST([FAKEROOT])
				;;
		esac
	],
	[
		AC_PATH_PROG([FAKEROOT], [fakeroot])
		if test -z "${FAKEROOT}"; then
			AC_MSG_ERROR([fakeroot not found])
		fi
	]
)

AC_ARG_WITH(
	[opkg],
	[AS_HELP_STRING([--with-opkg=PATH], [path to opkg utility])],
	[
		case "${withval}" in
			'yes'|'')
				AC_MSG_ERROR([--with-opkg requires an argument])
				;;
			'no')
				AC_MSG_ERROR([opkg is required])
				;;
			*)
				OPKG="${withval}"
				AC_SUBST([OPKG])
				;;
		esac
	],
	[
		AC_PATH_PROG([OPKG], [opkg])
		if test -z "${OPKG}"; then
			AC_MSG_ERROR([opkg not found])
		fi
	]
)

AC_ARG_WITH(
	[touch],
	[AS_HELP_STRING([--with-touch=PATH], [path to touch utility])],
	[
		case "${withval}" in
			'yes'|'')
				AC_MSG_ERROR(
					[--with-touch requires an argument])
				;;
			'no')
				AC_MSG_ERROR([touch is required])
				;;
			*)
				TOUCH="${withval}"
				AC_SUBST([TOUCH])
				;;
		esac
	],
	[
		AC_PATH_PROG([TOUCH], [touch])
		if test -z "${TOUCH}"; then
			AC_MSG_ERROR([touch not found])
		fi
	]
)

AC_ARG_WITH(
	[tar],
	[AS_HELP_STRING([--with-tar=PATH], [path to tar utility])],
	[
		case "${withval}" in
			'yes'|'')
				AC_MSG_ERROR(
					[--with-tar requires an argument])
				;;
			'no')
				AC_MSG_ERROR([tar is required])
				;;
			*)
				TAR="${withval}"
				AC_SUBST([TAR])
				;;
		esac
	],
	[
		AC_PATH_PROG([TAR], [tar])
		if test -z "${TAR}"; then
			AC_MSG_ERROR([tar not found])
		fi
	]
)
AC_MSG_CHECKING([whether tar accepts -T and --no-recursion])
rm -Rf conftest.dir 1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD
mkdir conftest.dir 1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD
touch conftest.dir/foo conftest.dir/bar \
	1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD
if printf '%s\n' conftest.dir/ conftest.dir/foo | ${TAR} -cf conftest.tar \
		--no-recursion -T - 1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD
then
	if ${TAR} -tf conftest.tar 2>&AS_MESSAGE_LOG_FD | grep -Fq 'foo' && \
			${TAR} -tf conftest.tar 2>&AS_MESSAGE_LOG_FD | \
			grep -Fvq 'bar'; then
		AC_MSG_RESULT([yes])
	else
		AC_MSG_RESULT([no])
		AC_MSG_ERROR([tar with -T and --no-recursion is required])
	fi
else
	AC_MSG_RESULT([no])
	AC_MSG_ERROR([tar with -T and --no-recursion is required])
fi

AC_ARG_WITH(
	[gzip],
	[AS_HELP_STRING([--with-gzip=PATH], [path to gzip utility])],
	[
		case "${withval}" in
			'yes'|'')
				AC_MSG_ERROR(
					[--with-gzip requires an argument])
				;;
			'no')
				AC_MSG_ERROR([gzip is required])
				;;
			*)
				GZIP="${withval}"
				AC_SUBST([GZIP])
				;;
		esac
	],
	[
		AC_PATH_PROG([GZIP], [gzip])
		if test -z "${GZIP}"; then
			AC_MSG_ERROR([gzip not found])
		fi
	]
)

AC_ARG_WITH(
	[metadata],
	[AS_HELP_STRING([--with-metadata=SYSTEM],
		[use SYSTEM metadata plugin @<:@default: proteanos@:>@])],
	[
		case "${withval}" in
			'yes'|'')
				AC_MSG_ERROR([--with-metadata requires an $(:\
					)argument])
				;;
			'no')
				AC_MSG_ERROR([a metadata plugin is required])
				;;
			*)
				AC_SUBST([METADATA], ["${withval}"])
				;;
		esac
	],
	[
		AC_SUBST([METADATA], ['proteanos'])
	]
)

AC_CONFIG_FILES([Makefile])
AC_CONFIG_FILES([config.sh])
AC_OUTPUT()