问Unix:将PDF -files和图像合并成PDF -file？

EN

#!/bin/bash

# Convert arguments into list
N=0
for file in $*; do
        files[$N]=$file
        N=$[ $N + 1 ]
done
# Last element of list is our destination filename
N=$[ $N - 1 ]
LAST=$files[$N]
unset files[$N]
N=$[ $N - 1 ]
# Check all files in the input array, converting image types
T=0
for i in $( seq 0 $N ); do
        file=${files[$i]}
        case ${file##*.} in
                jpg|png|gif|tif)
                        temp="tmpfile.$T.pdf"
                        convert $file $temp
                        tmp[$T]=$temp
                        uses[$i]=$temp
                        T=$[ $T + 1 ]
                        # Or also: tmp=("${tmp[@]}" "$temp")
                ;;
                pdf)
                        uses[$i]=$file
                ;;
        esac
done
# Now assemble PDF files
pdftk ${uses[@]} cat output $LAST
# Destroy all temporary file names. Disabled because you never know :-)
echo "I would remove ${tmp[@]}"
# rm ${tmp[@]}