rpm-build/scripts/shell.req.in

#!/bin/sh -efu
#
# Copyright (C) 2000,2003  Dmitry V. Levin <ldv@altlinux.org>
# Copyright (C) 2007       Alexey Tourbin <at@altlinux.org>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#

. @RPMCONFIGDIR@/functions
. @RPMCONFIGDIR@/find-package

ShellReq()
{
	local f="$1"; shift

	local t sh
	t=$(file -bL "$f") || Fatal "${t:-$f: file type not available}"
	case "$t" in
		*"Bourne-Again shell script text"*)
			sh=/bin/bash ;;
		*" bash script text"*)
			sh=/bin/bash ;;
		*)
			sh=/bin/sh ;;
	esac
	$sh --rpm-requires </dev/null >/dev/null ||
		Fatal "$sh interpreter does not support --rpm-requires feature"

	local reqs line1
	if ! reqs="$($sh --rpm-requires "$f")"; then
		# sh --rpm-requires failed, and stderr is already there.
		# We are almost dead.  The last chance to escape is to see
		# if the shell is used only to re-exec another interpreter, e.g.
		#	exec tclsh "$0" "$@"
		if line1=$(egrep -m1 -v '^[[:space:]]*(#|$)' "$f"); then
			set -- $line1
			if [ $# -gt 1 ] && [ "$1" = exec ]; then
				Info "$f is $2 script!"
				FindPackage "$f" "$2"
				return 0
			fi
		fi
		Fatal "$f: $sh --rpm-requires failed"
	fi

	reqs="$(printf %s\\n "$reqs" |sed -n 's/^\(sh\|bash\|executable\)(\(.*\))$/\2/p' |LC_COLLATE=C sort -u)"

	local dname r
	dname=${f#${RPM_BUILD_ROOT-}}
	dname=${dname%/*}
	for r in $reqs; do
		case "$(type -t -- "$r")" in
			alias|keyword|function|builtin)
				continue ;;
		esac
		if grep -qs -Fx -- "$r" "${RPM_BUILD_ROOT-}$dname/.provides.sh"; then
			printf %s\\n "$dname($r)"
		elif grep -qs -Fx -- "$r" "$dname/.provides.sh"; then
			printf %s\\n "$dname($r)"
		else
			FindPackage "$f" "$r"
		fi
	done
}

ArgvFileAction ShellReq "$@"