rpm-build/scripts/shebang.req.in

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#!/bin/sh -efu
#
# Make dependencies for the first line in scripts.
# http://en.wikipedia.org/wiki/Shebang_(Unix)
#
# Copyright (C) 2007, 2008 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.
. @RPMCONFIGDIR@/functions
. @RPMCONFIGDIR@/find-package
ShebangReq()
{
local f="$1" line=; shift
line=$(sed -n '1s|^#![[:space:]]*/|/|p;q' "$f")
[ -n "$line" ] || return 0
set -- $line
CR=$'\r'
line="#!$(echo "$line" |sed -e "s/$CR/<CR>/g")"
CheckInterp()
{
case "$1" in
*"$CR") ;;
*) return 0 ;;
esac
Fatal "$f: trailing <CR> in interpreter: $line"
}
CheckArgs()
{
case "$*" in
*"$CR") ;;
*) return 0 ;;
esac
Warning "$f: trailing <CR> in arguments: $line"
}
local RPM_FINDPACKAGE_MANDATORY=1
case "$#,$1" in
1,*)
CheckInterp "$1"
FindPackage "$f" "$1"
;;
2,/usr/bin/env)
CheckInterp "$2"
FindPackage "$f" "$1" "$2"
;;
2,*)
CheckArgs "$2"
FindPackage "$f" "$1"
;;
*,/usr/bin/env)
CheckArgs "$*"
Fatal "$f: too many arguments: $line"
;;
*)
CheckArgs "$*"
Warning "$f: too many arguments: $line"
FindPackage "$f" "$1"
;;
esac
[ -z "${1##/*}" ] ||
Fatal "$f: interpreter must be an absolute pathname: $line"
}
ArgvFileAction ShebangReq "$@"