fontninja.py

from ninja_syntax import Writer
import glyphsLib
import argparse
import ufoLib2
import os
from fontTools import designspaceLib


parser = argparse.ArgumentParser(description='Create a ninja file to build a font')
parser.add_argument('input', metavar='INPUT')
args = parser.parse_args()

w = Writer(open("build.ninja", "w"))

w.rule("glyphs2ufo", "fontmake -o ufo -g $in")
w.rule("instanceufo", "fontmake -i -o ufo -m $in")
w.rule("instancettf", "fontmake -o ttf -u $in --output-path $out")
w.rule("instanceotf", "fontmake -o otf -u $in --output-path $out")

if args.input.endswith(".glyphs"):
  # Do the conversion once, so we know what the instances and filenames are
  designspace = glyphsLib.to_designspace(
            glyphsLib.GSFont(args.input),
            ufo_module=ufoLib2,
            generate_GDEF=True,
            store_editor_state=False,
            minimal=True,
        )
  designspace_path = os.path.join("master_ufo", designspace.filename)
  designspace.write(designspace_path)
  w.build(designspace_path, "glyphs2ufo", args.input)
else:
  designspace_path = args.input
  designspace = DesignSpaceDocument.fromfile(designspace_path)

# Build all instance UFOs
instance_ufos = [x.filename.replace("instance_ufos", "instance_ufo") for x in designspace.instances]
w.build(instance_ufos, "instanceufo", designspace_path)

for ufo in instance_ufos:
  otf = ufo.replace("instance_ufo", "instance_otf").replace(".ufo", ".otf")
  ttf = ufo.replace("instance_ufo", "instance_ttf").replace(".ufo", ".ttf")
  w.build(ttf, "instancettf", ufo)
  w.build(otf, "instanceotf", ufo)

w.close()