Add alternatives.mk, a file used to manipulate the alternatives system.

A package can optionally provide an ALTERNATIVES file which contains pairs
of wrapper/alternative, one per line.  The file is then used by the install
and deinstall scripts to register the alternatives and to create the
appropriate wrappers.

Make bsd.pkg.mk include this new file.  This happens unconditionally to
keep all the alternatives logic in an independent file.  Otherwise, some
of the stuff could have to be moved to bsd.pkg.mk, breaking consistency.

2 files changed, 61 insertions, 1 deletions

diff --git a/mk/alternatives.mk b/mk/alternatives.mk
new file mode 100644
index 00000000000..1d6770ba5dd
--- /dev/null
+++ b/mk/alternatives.mk
@@ -0,0 +1,56 @@
+# $NetBSD: alternatives.mk,v 1.1 2005/01/25 13:13:35 jmmv 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} $${STAGE} = "POST-INSTALL"; then'; \
+	${ECHO} '${CAT} >./+ALTERNATIVES <<EOF'; \
+	${SED} ${FILES_SUBST_SED} <${ALTERNATIVES_SRC}; \
+	${ECHO} 'EOF'; \
+	${ECHO} '${PKG_ALTERNATIVES} -s register ./+ALTERNATIVES'; \
+	${ECHO} 'fi'; \
+	} >${WRKDIR}/.altinstall
+
+${WRKDIR}/.altdeinstall: ${ALTERNATIVES_SRC}
+	@{ ${ECHO} 'if ${TEST} $${STAGE} = "DEINSTALL"; then'; \
+	${ECHO} '${PKG_ALTERNATIVES} -s unregister ./+ALTERNATIVES'; \
+	${ECHO} '${RM} -f ./+ALTERNATIVES'; \
+	${ECHO} 'fi'; \
+	} >${WRKDIR}/.altdeinstall
+
+PRINT_PLIST_AWK+=	/^libdata\/alternatives\// { next; }
+PRINT_PLIST_AWK+=	/^@dirrm libdata\/alternatives/ { next; }
+
+DEPENDS+=		pkg_alternatives>=1.0:../../pkgtools/pkg_alternatives
+
+EVAL_PREFIX+=			PREFIX.pkg_alternatives=pkg_alternatives
+PREFIX.alternatives_DEFAULT=	${LOCALBASE}
+PKG_ALTERNATIVES=		${PREFIX.pkg_alternatives}/sbin/pkg_alternatives
+
+INSTALL_EXTRA_TMPL+=	${WRKDIR}/.altinstall
+DEINSTALL_EXTRA_TMPL+=	${WRKDIR}/.altdeinstall
+USE_PKGINSTALL=		YES
+
+.endif
+
+.endif	# ALTERNATIVES_MK
diff --git a/mk/bsd.pkg.mk b/mk/bsd.pkg.mk
index 87a0e0b4398..d3ad9cd1898 100644
--- a/mk/bsd.pkg.mk
+++ b/mk/bsd.pkg.mk
@@ -1,4 +1,4 @@
-#	$NetBSD: bsd.pkg.mk,v 1.1572 2005/01/24 19:57:42 tv Exp $
+#	$NetBSD: bsd.pkg.mk,v 1.1573 2005/01/25 13:13:35 jmmv Exp $
 #
 # This file is in the public domain.
 #
@@ -749,6 +749,10 @@ USE_MAKEINFO?=	no		# default to not using makeinfo
 . include "../../mk/texinfo.mk"
 .endif
 
+# Handle alternatives
+#
+.include "../../mk/alternatives.mk"
+
 # CONF_DEPENDS notes a dependency where the config directory for the
 # package matches the dependency's config directory.  CONF_DEPENDS is
 # only meaningful if ${PKG_INSTALLATION_TYPE} == "pkgviews".