Add "pkgtasks" framework to generate data files used by pkgtasks.

A full dependency on the "pkgtasks" package will be added if a
non-empty data file is generated by the framework.

This framework is not yet hooked into bsd.pkg.mk, pending some
other changes.

1 files changed, 72 insertions, 0 deletions

diff --git a/mk/pkgtasks/shells.mk b/mk/pkgtasks/shells.mk
new file mode 100644
index 00000000000..2447df8caf9
--- /dev/null
+++ b/mk/pkgtasks/shells.mk
@@ -0,0 +1,72 @@
+# $NetBSD: shells.mk,v 1.1 2017/06/01 02:06:04 jlam Exp $
+#
+# Copyright (c) 2017 The NetBSD Foundation, Inc.
+# All rights reserved.
+#
+# This code is derived from software contributed to The NetBSD Foundation
+# by Johnny C. Lam.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+# 1. Redistributions of source code must retain the above copyright
+#    notice, this list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the above copyright
+#    notice, this list of conditions and the following disclaimer in the
+#    documentation and/or other materials provided with the distribution.
+#
+# THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+# ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+# TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+# PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
+# BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+# POSSIBILITY OF SUCH DAMAGE.
+
+# Generate the data file for the shells package task.
+
+# PKG_REGISTER_SHELLS
+#	Whether to automatically update the /etc/shells database.
+#
+#	Possible: yes, no
+#	Default: yes
+#
+_USER_VARS.pkgtasks+=	PKG_REGISTER_SHELLS
+PKG_REGISTER_SHELLS?=	yes
+FILES_SUBST+=		PKG_REGISTER_SHELLS=${PKG_REGISTER_SHELLS:Q}
+
+# PKG_SHELL
+#	List of shell pathnames that should be added or removed from
+#	the shell database, /etc/shells.  If a pathname is a relative
+#	path, then it is taken to be relative to ${PREFIX}.
+#
+_PKG_VARS.pkgtasks+=	PKG_SHELL
+PKG_SHELL?=		# empty
+
+# Trigger pkgtasks dependency if needed.
+_PKGTASKS_DATAVARS.shells=	PKG_SHELL
+.for _var_ in ${_PKGTASKS_DATAVARS.shells}
+.  if !empty(${_var_})
+USE_PKGTASKS=		yes
+.  endif
+.endfor
+
+# Strip leading "${PREFIX}/" from shell pathname.
+_PKG_SHELL=		${PKG_SHELL:S|^${PREFIX}/||g}
+
+_PKGTASKS_DATA.shells=	${_PKGTASKS_DIR}/shells
+_PKGTASKS_DATAFILES+=	${_PKGTASKS_DATA.shells}
+
+${_PKGTASKS_DATA.shells}:
+	${RUN}${MKDIR} ${.TARGET:H:Q}
+	${RUN}exec > ${.TARGET}.tmp
+	${RUN}set -- args ${_PKG_SHELL}; shift;				\
+	while ${TEST} "$$#" -gt 0; do					\
+		shell="$$1"; shift;					\
+		${ECHO} "# SHELL: $$shell" >> ${.TARGET}.tmp;		\
+	done
+	${RUN}${MV} ${.TARGET:Q}.tmp ${.TARGET:Q}