# $NetBSD: shell,v 1.1 2006/05/21 23:50:15 jlam Exp $
#
# Generate a +SHELL script that handles shell registration for the package.
#
case "${STAGE},$1" in
UNPACK,|UNPACK,+SHELL)
	${CAT} > ./+SHELL << 'EOF'
#!@SH@
#
# +SHELL - shell registration script
#
# Usage: ./+SHELL ADD|REMOVE [metadatadir]
#        ./+SHELL CHECK-ADD|CHECK-REMOVE [metadatadir]
#
# This script supports two actions, ADD and REMOVE, that will add or
# remove shell paths from the shell database in /etc/shells.  The
# CHECK-ADD action will check whether shell paths provided by the
# package are missing from the shell database, and print an informative
# message noting those shell paths.  The CHECK-REMOVE action will check
# whether shell paths provided by the package are still present in the
# shell database, and print an informative message noting those shell
# paths.  The CHECK-ADD and CHECK-REMOVE actions return non-zero if
# they detect either missing or existing paths, respectively.
#
# Lines starting with "# SHELL: " are data read by this script that
# name the shell paths that should be added or removed from the shell
# database.  If the path is relative, then it is taken to be relative
# to ${PKG_PREFIX}.
#
#	# SHELL: bin/pdksh
#
CAT="@CAT@"
CP="@CP@"
ECHO="@ECHO@"
GREP="@GREP@"
PWD_CMD="@PWD_CMD@"
RM="@RM@"
SED="@SED@"
SORT="@SORT@"
TEST="@TEST@"
TRUE="@TRUE@"
TOUCH="@TOUCH@"

SELF=$0
ACTION=$1

PKG_METADATA_DIR="${2-`${PWD_CMD}`}"
: ${PKG_PREFIX=@PREFIX@}
: ${PKGNAME=${PKG_METADATA_DIR##*/}}

case "${PKG_REGISTER_SHELLS:-@PKG_REGISTER_SHELLS@}" in
[Yy][Ee][Ss]|[Tt][Rr][Uu][Ee]|[Oo][Nn]|1)
	_PKG_REGISTER_SHELLS=yes
	;;
[Nn][Oo]|[Ff][Aa][Ll][Ss][Ee]|[Oo][Ff][Ff]|0)
	_PKG_REGISTER_SHELLS=no
	;;
esac

exitcode=0
case $ACTION in
ADD)
	${SED} -n "/^\# SHELL: /{s/^\# SHELL: //;p;}" ${SELF} | ${SORT} -u |
	{ while read shell; do
		case ${_PKG_REGISTER_SHELLS} in
		no)	continue ;;
		esac
		case $shell in
		/*)	continue ;;
		*)	if [ ${PKG_PREFIX} = / ] ; then
				shell="/$shell"
			else
				shell="${PKG_PREFIX}/$shell"
			fi ;;
		esac
		${TEST} -f "$shell" || continue

		shelldb="/etc/shells"
		${TEST} -f "$shelldb" || continue
		if ${TEST} -f "$shelldb" && \
		   ${GREP} "^$shell" $shelldb >/dev/null; then
			:
		else
			case "$printed_header" in
			yes)	;;
			*)	printed_header=yes
				${ECHO} "==========================================================================="
				${ECHO} "Adding shells from ${PKGNAME} to $shelldb:"
				${ECHO} ""
				;;
			esac
			${ECHO} "	$shell"
                	${TOUCH} $shelldb
                	${CP} $shelldb $shelldb.pkgsrc."$$"
			{ ${CAT} $shelldb.pkgsrc."$$"; ${ECHO} "$shell"; } > $shelldb
                	${RM} $shelldb.pkgsrc."$$"
		fi
	done
	case "$printed_header" in
	yes)	${ECHO} ""
		${ECHO} "==========================================================================="
		;;
	esac; }
	;;

REMOVE)
	${SED} -n "/^\# SHELL: /{s/^\# SHELL: //;p;}" ${SELF} | ${SORT} -u |
	{ while read shell; do
		case ${_PKG_REGISTER_SHELLS} in
		no)	continue ;;
		esac
		case $shell in
		/*)	continue ;;
		*)	if [ ${PKG_PREFIX} = / ] ; then
				shell="/$shell"
			else
				shell="${PKG_PREFIX}/$shell"
			fi ;;
		esac
		${TEST} -f "$shell" || continue

		shelldb="/etc/shells"
		if ${TEST} -f "$shelldb" && \
		   ${GREP} "^$shell" $shelldb >/dev/null; then
			case "$printed_header" in
			yes)	;;
			*)	printed_header=yes
				${ECHO} "==========================================================================="
				${ECHO} "Removing shells from ${PKGNAME} to $shelldb:"
				${ECHO} ""
				;;
			esac
			${ECHO} "	$shell"
                	${TOUCH} $shelldb
                	${CP} $shelldb $shelldb.pkgsrc."$$"
			{ ${GREP} -v "^$shell" $shelldb.pkgsrc."$$" || ${TRUE}; } > $shelldb
                	${RM} $shelldb.pkgsrc."$$"
		fi
	done
	case "$printed_header" in
	yes)	${ECHO} ""
		${ECHO} "==========================================================================="
		;;
	esac; }
	;;

CHECK-ADD)
	${SED} -n "/^\# SHELL: /{s/^\# SHELL: //;p;}" ${SELF} | ${SORT} -u |
	{ while read shell; do
		case $shell in
		/*)	continue ;;
		*)	if [ ${PKG_PREFIX} = / ] ; then
				shell="/$shell"
			else
				shell="${PKG_PREFIX}/$shell"
			fi ;;
		esac
		${TEST} -f "$shell" || continue

		shelldb="/etc/shells"
		if ${TEST} -f "$shelldb" && \
		   ${GREP} "^$shell" $shelldb >/dev/null; then
			:
		else
			case "$printed_header" in
			yes)	;;
			*)	printed_header=yes
				${ECHO} "==========================================================================="
				${ECHO} "The following lines can be added to $shelldb:"
				${ECHO} ""
				;;
			esac
			${ECHO} "	$shell"
		fi
	done
	case "$printed_header" in
	yes)	${ECHO} ""
		${ECHO} "==========================================================================="
		exit 1
		;;
	esac; }
	${TEST} $? -eq 0 || exitcode=1
	;;

CHECK-REMOVE)
	${SED} -n "/^\# SHELL: /{s/^\# SHELL: //;p;}" ${SELF} | ${SORT} -u |
	{ while read shell; do
		case $shell in
		/*)	continue ;;
		*)	if [ ${PKG_PREFIX} = / ] ; then
				shell="/$shell"
			else
				shell="${PKG_PREFIX}/$shell"
			fi ;;
		esac
		${TEST} -f "$shell" || continue

		shelldb="/etc/shells"
		if ${TEST} -f "$shelldb" && \
		   ${GREP} "^$shell" $shelldb >/dev/null; then
			case "$printed_header" in
			yes)	;;
			*)	printed_header=yes
				${ECHO} "==========================================================================="
				${ECHO} "The following lines can be removed from $shelldb:"
				${ECHO} ""
				;;
			esac
			${ECHO} "	$shell"
		fi
	done
	case "$printed_header" in
	yes)	${ECHO} ""
		${ECHO} "==========================================================================="
		exit 1
		;;
	esac; }
	${TEST} $? -eq 0 || exitcode=1
	;;

*)
	${ECHO} "Usage: ./+SHELL ADD|REMOVE [metadatadir]"
	${ECHO} "       ./+SHELL CHECK-ADD|CHECK-REMOVE [metadatadir]"
	;;
esac
exit $exitcode

EOF
	${SED} -n "/^\# SHELL: /p" ${SELF} >> ./+SHELL
	${CHMOD} +x ./+SHELL
	;;
esac