Fish script to convert PDF to ZIP

pdf2zip.fish

#!/bin/fish

# pdf2zip.fish

function usage
        printf "
Usage: pdf2zip.fish [Only one PDF file]

Transforms a single PDF file, passed under cmdline, to an equivalent ZIP file,
storing it in the current directory"
end

# TODO: test for only one directory
function cleanup
    echo "Cleaning $argv.."
    rm -rfv $argv
end

trap 'cleanup $TMPDIR' 2 15

if test (count $argv) != 1 > /dev/null
        usage
        exit 1
end

set CWD (pwd)
set TMPDIR (mktemp -d -p /tmp/ pdf2zip.XXXXXX)
if test "$TMPDIR" = ""
        echo "Error creating temporary dir!"
        exit 1
end

set pdffile (realpath $argv)
set BASENAME (basename $pdffile)
set DIRNAME (dirname $pdffile)

set FILENAME "$DIRNAME/$BASENAME"
set ZIPNAME ""(echo $BASENAME|sed -e's/\.[a-zA-Z0-9]\{1,\}$/\.zip/g')""
        
if [ (file $FILENAME | grep -c -e'PDF') != 1 ]
        echo "$FILENAME doesn't appear to be a PDF document!"
        cleanup $TMPDIR
        exit 1
end

cd $TMPDIR
rm -fr "$BASENAME"-dir
mkdir -p "$BASENAME"-dir
cd "$BASENAME"-dir

pdfimages -png "$FILENAME" (echo "$BASENAME" | sed 's|\....|-image|')

zip -0 -r ../"$ZIPNAME" .
cd ..
mv $ZIPNAME $CWD
cleanup $TMPDIR