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#!/usr/bin/env bash
#
# epub_font_stuffer
# Charlotte Koch <charlotte@magentastripe.com>
#
# By default, the EPUB generated by asciidoctor-epub3(1) includes only a
# base set of fonts. This script augments the EPUB by including *all* the
# fonts from the given directory.
#
# This file is part of WilloraPDF.
#
# REQUIREMENTS: zip(1), unzip(1), rsync(1)
#
set -e
INPUT=""
OUTPUT=""
FONTDIR=""
# Parse and verify command line arguments.
die() {
echo "FATAL: $1"
exit 1
}
while [ $# -gt 0 ]; do
case "$1" in
--input)
INPUT="$2"
shift 2
;;
--output)
OUTPUT="$2"
shift 2
;;
--fontdir)
FONTDIR="$2"
shift 2
;;
*)
die "Unknown option: $1"
;;
esac
done
test -n "${INPUT}" || die "Missing argument: --input"
test -n "${OUTPUT}" || die "Missing argument: --output"
test -n "${FONTDIR}" || die "Missing argument: --fontdir"
test -f "${INPUT}" || die "Can't find input file: ${INPUT}"
test -d "${FONTDIR}" || die "Can't find font directory: ${FONTDIR}"
# Work around the need to change directories in the subsequent zip(1)
# command
real_output="$(pwd)/${OUTPUT}"
# Extract the EPUB to a temporary location, copy the additional fonts into
# it, then zip it back up.
workdir="$(mktemp -d)"
function cleanup() {
rm -rf ${workdir}
}
trap cleanup EXIT
unzip -q -d ${workdir} ${INPUT}
rsync -avr ${FONTDIR}/ ${workdir}/EPUB/fonts/
cd ${workdir}
zip -r ${real_output} .
cd -
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