Move "add extra fonts to EPUB feature" out into its own script

1 files changed, 73 insertions, 0 deletions

diff --git a/script/epub_font_stuffer.sh b/script/epub_font_stuffer.sh
new file mode 100644
index 0000000..fe9939f
--- /dev/null
+++ b/script/epub_font_stuffer.sh
@@ -0,0 +1,73 @@
+#!/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 -