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#!/bin/sh
## Generate EPUB for the R manuals via texi2any --epub (needs texi2any 7
## or later) and post-process results to give valid EPUB according to
## epubcheck, provinding that zip and unzip are available.
## Arguments:
## maj min texi html
## with maj and min the maj and min components of the tex2any version,
## texi the path to the Texinfo source and html the name of the EPUB
## target.
SED=${SED-sed}
TEXI2ANY=${TEXI2ANY-texi2any}
UNZIPCMD=${UNZIPCMD-unzip}
ZIPCMD=${ZIPCMD-zip}
## Avoid dirname for portability ... really needed?
srcdir=`echo "$0" | ${SED} 's/\/texi2epub.sh//'`
${TEXI2ANY} --epub -I${srcdir} $3 -o $4
if test -n "${UNZIPCMD}" && test -n "${ZIPCMD}"; then
mv $4 $4.zip
mkdir $4.dir && cd $4.dir
${UNZIPCMD} -q ../$4.zip
## Apparenty, for EPUB 3.2 (but not 3.3?) one needs something like
## <meta property="dcterms:modified">2011-01-01T12:00:00Z</meta>
date=`date +%Y-%m-%dT%TZ`
## Should be portable according to
## <https://pubs.opengroup.org/onlinepubs/9699919799/utilities/date.html>
cat >fix1.sed <<-EOF
/<meta property="dcterms:modified">/d
s/^\( *\)\(<dc:title>\)/\1<meta property="dcterms:modified">${date}<\/meta>\\
\1\2/
EOF
for f in EPUB/*.opf; do
mv $f $f.tmp
${SED} -f fix1.sed $f.tmp > $f
rm -f $f.tmp
done
cat >fix2.sed <<-EOF
s/\(<table[^>]*\)border="0">/\1border="">/
s/<td width="/<td style="width: /g
s/<th width="/<th style="width: /g
s/\(<dd><a class="index-entry-id" id="index-anova">\)/<dt><\/dt>\1/
EOF
for f in EPUB/xhtml/*.xhtml; do
mv $f $f.tmp
${SED} -f fix2.sed $f.tmp > $f
rm -f $f.tmp
done
## Apparently extra fields are not allowed in mimetype.
${ZIPCMD} -q -X ../$4 mimetype
${ZIPCMD} -q -r ../$4 META-INF EPUB
cd ..
rm -rf $4.dir $4.zip
fi
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