subset.sh - mozsearch

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#!/bin/bash

# Produces subset font files for testing the `text-spacing-trim` property.

# Requires `pyftsubset` from <https://github.com/fonttools/fonttools>.

range="--unicodes=20-7E,2018-201F,56FD,6C34,3000-301F,30FB,FF01-FF1F,FF5B-FF65"

subrange="--unicodes=20-7E,56FD,FF08-FF09"

features="--layout-features+=halt,fwid,hwid,palt,pwid,vhal,vpal"

features_chws="$features,chws,vchw"

for path in "$@"; do

  filename="$(basename -- "$path")"

  stem="${filename%.*}"

  output_halt="$stem-subset-halt.otf"

  output_chws="$stem-subset-chws.otf"

  output_min="$stem-subset-halt-min.otf"

  (set -x;

    pyftsubset "$path" $range $features --output-file="$output_halt"

    pyftsubset "$path" $range $features_chws --output-file="$output_chws"

    pyftsubset "$output_halt" $subrange $features --output-file="$output_min"

done