printer

#!/bin/bash
# This quick script provides a way to print paper-efficient, double-sided
# booklets from PDFs on my cheap printer.
# Dependencies: 
#   lp, pdfjam, pdftk, mupdf, krop
set -euo pipefail
IFS=$'\n\t'
LP_ARGS=(\
    -o "TonerSaveMode=OFF" \
    -o "Resolution=600dpi" \
    -o "PageSize=A4" \
    -o "media=a4" \
    -o "fit-to-page" \
)

# Exit if given printer is unknown. Check `lpstat -e` for available printers
(lpoptions -d ${PRINTER:-undefined} 2>&1 > /dev/null) || \
    (echo "Printer \"${PRINTER:-undefined}\" is unknown." 1>&2; exit 1)


# Make a temporary directory for this run, and make sure it gets deleted
TMP=$(mktemp -d "${TMPDIR:-/tmp/}$(basename $0).XXXXX")
function finalize {
    rm -rf "${TMP}"
}
trap finalize EXIT


# Start processing
INPUT="$1"
OUTPUT="$INPUT"

# PDFs are cropped before use using a GUI, to get rid of the margins
INPUT="${OUTPUT}"
OUTPUT="$(mktemp -p "${TMP}" "XXX.pdf")"
krop --output "${OUTPUT}" "${INPUT}"

# This crops the whitespace away automatically
#echo "Cropping whitespace..." 1>&2
#INPUT="${OUTPUT}"
#OUTPUT="$(mktemp -p "${TMP}" "XXX.pdf")"
#pdfcrop \
#    --hires \
#    --noclip \
#    --margins '17' \
#    "${INPUT}" "${OUTPUT}"

# This scales it back to A4 size
#echo "Scaling back to A4 size..." 1>&2 
#INPUT="${OUTPUT}"
#OUTPUT="$(mktemp -p "${TMP}" "XXX.pdf")"
#pdfjam \
#    --paper 'a4paper' \
#    --fitpaper 'true' \
#    --outfile "${OUTPUT}" \
#    -- "${INPUT}" -

# Puts it in booklet form
echo "Making booklet..." 1>&2
INPUT="${OUTPUT}"
OUTPUT="$(mktemp -p "${TMP}" "XXX.pdf")"
pdfjam \
    --booklet 'true' \
    --signature '4' \
    --landscape \
    --delta '2.2cm 0cm' \
    --outfile "${OUTPUT}" \
    -- "${INPUT}" -

echo "Showing preview..." 1>&2
mupdf "${OUTPUT}"
if read -p "Continue?"; then

    # Print odd pages
    ODD="$(mktemp -p "${TMP}" "XXX.odd.pdf")"
    pdftk "${OUTPUT}" cat odd output "${ODD}"
    lp -d "$PRINTER" "${LP_ARGS[@]}" "${ODD}"

    read -p "Wait for printing to finish, flip and reinsert the pages, then press enter to continue."

    # Print even pages
    EVEN="$(mktemp -p "${TMP}" "XXX.even.pdf")"
    pdftk "${OUTPUT}" cat even output "${EVEN}"
    lp -d "$PRINTER" "${LP_ARGS[@]}" -o outputorder=reverse "${EVEN}"

fi