# $NetBSD: alternatives.mk,v 1.6 2006/03/14 01:14:35 jlam Exp $
#
# This Makefile fragment handles the alternatives system, registering a
# package in the database.
#
# The ALTERNATIVES_SRC variable contains the path to a file listing the
# alternatives provided by the package.  It defaults to the ALTERNATIVES
# file in the current directory if found.  If this variable is empty, no
# actions are taken by this file.
#

.if !defined(ALTERNATIVES_MK)
ALTERNATIVES_MK=	# defined

.if !defined(ALTERNATIVES_SRC)
.  if exists(${.CURDIR}/ALTERNATIVES)
ALTERNATIVES_SRC?=	${.CURDIR}/ALTERNATIVES
.  else
ALTERNATIVES_SRC?=
.  endif
.endif

.if !empty(ALTERNATIVES_SRC)

${WRKDIR}/.altinstall: ${ALTERNATIVES_SRC}
	@{ ${ECHO} 'if ${TEST} $${STAGE} = "POST-INSTALL"; then'; \
	${ECHO} '${CAT} >./+ALTERNATIVES <<EOF'; \
	${SED} ${FILES_SUBST_SED} <${ALTERNATIVES_SRC}; \
	${ECHO} 'EOF'; \
	${ECHO} 'if ${TEST} -x ${PKG_ALTERNATIVES}; then'; \
	${ECHO} '${PKG_ALTERNATIVES} -gs register ./+ALTERNATIVES'; \
	${ECHO} 'fi'; \
	${ECHO} 'fi'; \
	} >${WRKDIR}/.altinstall

${WRKDIR}/.altdeinstall: ${ALTERNATIVES_SRC}
	@{ ${ECHO} 'if ${TEST} $${STAGE} = "DEINSTALL"; then'; \
	${ECHO} 'if ${TEST} -x ${PKG_ALTERNATIVES}; then'; \
	${ECHO} '${PKG_ALTERNATIVES} -gs unregister ./+ALTERNATIVES'; \
	${ECHO} 'fi'; \
	${ECHO} '${RM} -f ./+ALTERNATIVES'; \
	${ECHO} 'fi'; \
	} >${WRKDIR}/.altdeinstall

PRINT_PLIST_AWK+=	/^libdata\/alternatives\// { next; }
PRINT_PLIST_AWK+=	/^@dirrm libdata\/alternatives/ { next; }

EVAL_PREFIX+=			PREFIX.pkg_alternatives=pkg_alternatives
PREFIX.alternatives_DEFAULT=	${LOCALBASE}
PKG_ALTERNATIVES=		${PREFIX.pkg_alternatives}/sbin/pkg_alternatives

INSTALL_TEMPLATE+=	${WRKDIR}/.altinstall
DEINSTALL_TEMPLATE+=	${WRKDIR}/.altdeinstall

.endif

.endif	# ALTERNATIVES_MK