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#!/bin/sh 
##
##  pdfbook: Rearrange pages of one or more PDF files into 2-up signatures
##
##  Author David Firth (http://go.warwick.ac.uk/dfirth), with help
##  from Marco Pessotto
##
##  This is a simple wrapper for pdfjam, version 2.05
##
case $1 in
    --short-edge)
	shortedge=true ;
	shift ;
	;;
    *) 
	;;
esac
for arg
do
    case $arg in
	--signature*)
	    ## catches both --signature and --signature*
	    signature=true ; break
	    ;;
	*) ;;
    esac
done
## 
## If $signature is empty, we need to use a default:
## 
if test -z "$signature" ; then
    signature="--signature 4"
else
    signature=""
fi
##
## Make the call to pdfjam:
##
if test -z "$shortedge"
then 
    exec pdfjam --landscape --suffix book $signature "$@"
else
    (kpsewhich everyshi.sty >/dev/null) || {
	echo "the 'everyshi' package is not installed."; exit 1
    }
    exec pdfjam --landscape --suffix book $signature \
	--preamble '\usepackage{everyshi}
\makeatletter
\EveryShipout{\ifodd\c@page\pdfpageattr{/Rotate 180}\fi}
\makeatother
' "$@"
fi