Install ttf and otf fonts for use with groff

groff-install-font

#!/usr/bin/env bash
# groff-install-ttf converts a TrueType (ttf) or OpenType (otf) font to a
# Printer Font ASCII (pfa) font and a groff font (ditroff) and installs them to
# groff's site-font directory.
#
# Requires fontforge.
#
# You're the best, Peter Schaffter, but contrary to the verbose and
# difficult-to-follow http://www.schaffter.ca/mom/momdoc/appendices.html#fonts,
# the t42 file doesn't seem to be necessary, at least with recent versions of
# groff. Just copy the groff font and pfa generated by fontforge to both
# site-font device directories (devps, devpdf) and update the "download" files
# with the internalname -> <pfa> mapping.
set -eu

font=${1:?No font file given}; shift
groffname=${1:?No groff font name given, eg TimesR, TimesI, TimesB, etc}; shift
name=$(basename "$font" .${font##*.})

prefix=/usr/share/groff
fontdir=$prefix/current/font
textmap=$fontdir/devps/generate/textmap
sitefont=$prefix/site-font

# Do everything in a temp directory.
tmp=$(mktemp -d)
cd "$tmp"

fontforge -lang=ff -c "Open(\"$font\");Generate(\"$name.pfa\");"
afmtodit "$name.afm" $textmap $groffname

mkdir -p $sitefont
for dir in $sitefont/dev{ps,pdf}; do
    mkdir -p $dir
    cp $name.pfa $groffname $dir
done

internalname=$(awk '/^internalname/ {print $2}' $groffname)
echo -e "$internalname\t$name.pfa" >>$fontdir/devps/download
echo -e "\t$internalname\t$name.pfa" >>$fontdir/devpdf/download

rm -rf "$tmp"