Fontconfig ConfGen

mkfontsconf.sh

#!/bin/bash
# My brain is not feeling well so I will be doing a wizard instead.
# It should hopefully be self-explainatory then.
# ref: https://fedoraproject.org/wiki/Fontconfig_packaging_tips
fc_head='<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE fontconfig SYSTEM "../fonts.dtd">
<fontconfig>'
fc_tail='</fontconfig>'

declare -A fc_segment
declare -a fc_seg_ord

__xml_esc(){
  declare -n __var="$1" || return
  __var=${__var//'&'/'&amp;'} \
  __var=${__var//'<'/'&lt;'} \
  __var=${__var//'>'/'&gt;'} \
  __var=${__var//'"'/'&quot;'}
}

seg_add(){
  (($# == 1 || $# == 2)) || return
  (($# == 2)) && fc_segment["$1"]="$2"
  seg_del "$1"
  fc_seg_ord+=("$1")
}

seg_del(){
  local __seg_idx;
  for __seg_idx in "${!fc_seg_ord[@]}"; do
    if [[ $fc_seg_ord[__seg_idx] == $1 ]]; then
      unset 'fc_seg_ord[__seg_idx]'
    fi
  done
}

add_equiv(){
  (($# >= 2)) && local generic=$1 as_font=$2 || return
  local seg=equiv:${1//'/'/_}:${2//'/'/_}
  __xml_esc generic
  __xml_esc as_font
  seg_add "$seg" "<alias binding='same'>
  <family>$generic</family>
  <accept>
    <family>$as_font</family>
  </accept>
</alias>"
}

show_segs(){
  printf '* %s\n' "${fc_seg_ord[@]}"
}

stringify_segs(){
  local i
  for i in "${fc_seg_ord[@]}"; do
    printf '<!-- %s -->\n%s\n' "$i" "${fc_segment["$i"]}"
  done
}

save_segs(){
  
}

echo 
BASH_ENV="$(readlink -f "$0")" exec bash -i -$- -- "$@"