中綴じ用の面付けをするスクリプト

nakatoji.zsh

#!/bin/zsh
[ -z $1 ] && exit -1
nakatoji_sequence(){
    last=$(expr 4 \* $1)
    for i in {1..$1} ; do
        echo -n "$(expr $last - $i \* 2 + 2),$(expr $i \* 2 - 1),"
        echo -n "$(expr $i \* 2),$(expr 1 + $last - $i \* 2),"
    done | sed "s/,$//g"
}
file=$(echo $1 | sed "s/\.pdf$//g")
pages=$(pdfinfo $file.pdf | grep Pages | sed "s/^.*: *//g")
pdfjam --outfile /dev/stdout $file.pdf -,{},{},{} 2>/dev/null | \
    pdfjam --nup 2x1 --landscape --outfile ${file}_nakatoji.pdf \
    /dev/stdin $(nakatoji_sequence $(expr \( $pages + 3 \) / 4)) 2>/dev/null