Teach the pkgsrc infrastructure to Just Know when the pkginstall

framework should be used.  This is implemented by creating a small
file mk/install/pkginstall.mk that guards the implementation makefile
mk/install/bsd.pkginstall.mk.  This guard file just checks whether
one of the pkginstall-related variables is non-empty, and if so, then
the implementation file is automatically included.  This completely
deprecates USE_PKGINSTALL, which no longer has any affect in pkgsrc.

mk/bsd.pkg.mk

@@ -1,4 +1,4 @@
-#	$NetBSD: bsd.pkg.mk,v 1.1774 2005/12/05 22:07:07 rillig Exp $
+#	$NetBSD: bsd.pkg.mk,v 1.1775 2005/12/29 06:18:53 jlam Exp $
 #
 # This file is in the public domain.
 #
@@ -505,18 +505,7 @@ PLIST_SUBST+=	OPSYS=${OPSYS:Q}					\
 #
 .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".
-#
-CONF_DEPENDS?=		# empty
-.if !empty(CONF_DEPENDS)
-USE_PKGINSTALL=		yes
-.endif
-
-.if defined(USE_PKGINSTALL) && !empty(USE_PKGINSTALL:M[yY][eE][sS])
-.  include "../../mk/install/bsd.pkginstall.mk"
-.endif
+.include "../../mk/install/pkginstall.mk"
 
 # Set INSTALL_FILE to be the name of any INSTALL file
 .if !defined(INSTALL_FILE) && exists(${PKGDIR}/INSTALL)

mk/install/bsd.pkginstall.mk

@@ -1,10 +1,10 @@
-# $NetBSD: bsd.pkginstall.mk,v 1.31 2005/12/29 03:44:38 jlam Exp $
+# $NetBSD: bsd.pkginstall.mk,v 1.32 2005/12/29 06:18:53 jlam Exp $
 #
-# This Makefile fragment is included by bsd.pkg.mk to use the common
-# INSTALL/DEINSTALL scripts.  To use this Makefile fragment, simply:
+# This Makefile fragment is included by mk/install/pkginstall.mk and is
+# the implemenation file for the common INSTALL/DEINSTALL scripts
+# framework.  To use the pkginstall framework, simply set the relevant
+# variables to customize the install scripts to the package.
 #
-# (1) Set the variables to customize the install scripts to the package, and
-# (2) Set USE_PKGINSTALL to YES in the package Makefile.
 
 .if defined(BSD_PKG_INSTALL_MK)
 PKG_FAIL_REASON+=	"[bsd.pkginstall.mk] Must not be included directly."

mk/install/pkginstall.mk

@@ -0,0 +1,47 @@
+# $NetBSD: pkginstall.mk,v 1.1 2005/12/29 06:18:53 jlam Exp $
+#
+# This Makefile fragment is included by bsd.pkg.mk and determines whether
+# or not the bsd.pkginstall.mk implementation file should be included.
+#
+# _PKGINSTALL_VARS is a list of the variables that, if non-empty, indicate
+#	that the pkginstall framework should be used.  These variables
+#	should be extracted from bsd.pkginstall.mk and are typically the
+#	variables named in the INSTALL_<SCRIPT>_MEMBERS lists.
+#
+# The variables listed in _PKGINSTALL_VARS are documented in
+# mk/install/bsd.pkginstall.mk.
+#
+_PKGINSTALL_VARS+=	HEADER_EXTRA_TMPL
+_PKGINSTALL_VARS+=	DEINSTALL_PRE_TMPL DEINSTALL_EXTRA_TMPL		\
+			DEINSTALL_TMPL
+_PKGINSTALL_VARS+=	INSTALL_TMPL INSTALL_EXTRA_TMPL			\
+			INSTALL_POST_TMPL INSTALL_UNPACK_TMPL
+_PKGINSTALL_VARS+=	DEINSTALL_SRC INSTALL_SRC
+
+_PKGINSTALL_VARS+=	PKG_GROUPS PKG_USERS
+_PKGINSTALL_VARS+=	SPECIAL_PERMS
+_PKGINSTALL_VARS+=	CONF_FILES CONF_FILES_PERMS			\
+			REQD_FILES REQD_FILES_PERMS			\
+			RCD_SCRIPTS
+_PKGINSTALL_VARS+=	MAKE_DIRS MAKE_DIRS_PERMS			\
+			REQD_DIRS REQD_DIRS_PERMS			\
+			OWN_DIRS OWN_DIRS_PERMS
+_PKGINSTALL_VARS+=	PKG_SHELL
+_PKGINSTALL_VARS+=	FONTS_DIRS.ttf FONTS_DIRS.type1 FONTS_DIRS.x11
+
+# 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 is "pkgviews".
+#
+_PKGINSTALL_VARS+=	CONF_DEPENDS
+
+_USE_PKGINSTALL=	no
+.for _var_ in ${_PKGINSTALL_VARS}
+.  if !empty(${_var_})
+_USE_PKGINSTALL=	yes
+.  endif
+.endfor
+
+.if !empty(_USE_PKGINSTALL:M[yY][eE][sS])
+.  include "../../mk/install/bsd.pkginstall.mk"
+.endif