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

2 files changed, 81 insertions, 11 deletions

diff --git a/mk/willora.mk b/mk/willora.mk
index ded3dc9..d2aca2a 100644
--- a/mk/willora.mk
+++ b/mk/willora.mk
@@ -70,6 +70,7 @@ ERBBER_SCRIPT=		script/erbber.rb
 UNICODE_TABLE=		script/unicodify.sed
 UNICODE_TABLE_2=	script/unicodify2.sed
 DOCX_FIXUP=		script/docx_fixup.sed
+EPUB_FONT_STUFFER=	script/epub_font_stuffer.sh
 
 DOCX_MANUSCRIPT_REF=	lib/WilloraPDF_Manuscript_Reference.docx
 ODT_MANUSCRIPT_REF=	lib/WilloraPDF_Manuscript_Reference.odt
@@ -228,11 +229,11 @@ EPUB_DESCR!=	cat ${EPUB_BLURBFILE}
 #
 # XXX Try to include EPUB_DESCR somewhere other than ARGV
 CLEANFILES+=	${EPUB_OUT}
-${EPUB_OUT}: Gemfile.lock ${EPUB_ADOC_TOTAL} ${EPUB_COVER_FILE} ${EPUB_STYLESHEET} ${EPUB_BLURBFILE}
+${EPUB_OUT}: Gemfile.lock ${EPUB_ADOC_TOTAL} ${EPUB_COVER_FILE} ${EPUB_STYLESHEET} ${EPUB_BLURBFILE} ${EPUB_FONT_STUFFER}
 	${BUNDLE} exec asciidoctor-epub3 \
 		-v \
 		-d book \
-		-o ${.TARGET} \
+		-o prestuffed.epub \
 		-a uuid="${EPUB_ISBN}" \
 		-a revdate="${EPUB_REVDATE}" \
 		-a producer="${PUBLISHER}" \
@@ -244,15 +245,11 @@ ${EPUB_OUT}: Gemfile.lock ${EPUB_ADOC_TOTAL} ${EPUB_COVER_FILE} ${EPUB_STYLESHEE
 		-a media=${MEDIA} \
 		-a text-align=justify \
 		${EPUB_ADOC_TOTAL}
-	rm -rf ./epub-cleanup ./cleaned.epub;		\
-		mkdir -p ./epub-cleanup;		\
-		cd ./epub-cleanup;			\
-		unzip -q ../${.TARGET};			\
-		rsync -avr ${FONTDIR}/ ./EPUB/fonts/;	\
-		zip ../cleaned.epub -r .;		\
-		cd ..;					\
-		rm -rf ./epub-cleanup;			\
-		mv ./cleaned.epub ${.TARGET};
+	bash ${EPUB_FONT_STUFFER}	\
+		--fontdir ${FONTDIR}	\
+		--input prestuffed.epub	\
+		--output ${.TARGET}
+	rm -f prestuffed.epub
 
 CLEANFILES+=	${EPUB_ADOC_TOTAL}
 ${EPUB_ADOC_TOTAL}: ${BASE_ERB} ${ERBBER_SCRIPT}
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 -