Script: fontcharlist

[webframp]

This SO answer has been pretty useful. Convert it to a script called fontcharlist installed via nix.

• https://unix.stackexchange.com/questions/595756/how-to-list-all-supported-glyphs-of-a-given-font

#!/bin/bash -

Usage() { echo "$0 FontFile"; exit 1; }
SayError() { local error=$1; shift; echo "$0: $@"; exit "$error"; }

[ "$#" -ne 1 ] && Usage

width=70
fontfile="$1"

[ -f "$fontfile" ] || SayError 4 'File not found'

list=$(fc-query --format='%{charset}\n' "$fontfile")

for    range in $list
do     IFS=- read start end <<<"$range"
       if    [ "$end" ]
       then
             start=$((16#$start))
         end=$((16#$end))
         for((i=start;i<=end;i++)); do
         printf -v char '\\U%x' "$i"
         printf '%b' "$char"
         done
       else
         printf '%b' "\\U$start"
       fi
done | grep -oP '.{'"$width"'}'

[webframp]

or maybe https://github.com/ryanoasis/nerd-fonts/blob/master/bin/scripts/test-fonts.sh