Work-Sans/sources/tools/replaceBracketTrick.py

### Based on a script by Stephen Nixon

import os
import sys
import fontTools
from fontTools.ttLib import TTFont
from fontTools.varLib.featureVars import addFeatureVariations

inputTTF = sys.argv[1]
style = sys.argv[2]

f = TTFont(inputTTF)
if style == "Upright":
    condSubst = [
        # A list of (Region, Substitution) tuples.
        ([{"wght": (0.158, 0.564)}], {"uniF8FF": "uniF8FF.001"}),
        ([{"wght": (0.868, 1)}], {"uni20B5": "uni20B5.201_230",
                                  "cent": "cent.201_230",
                                  "dollar": "dollar.201_230",
                                  "uni20B2": "uni20B2.201_230",
                                  "dollar.tf": "dollar.tf.201_230",
                                  "cent.tf": "cent.tf.201_230"}),
        ([{"wght": (0.71, 1)}], {"uni20A6": "uni20A6.169_230",
                                 "peseta": "peseta.169_230",
                                 "uni20A9": "uni20A9.169_230"}),
        ([{"wght": (0.564, 1)}], {"uni20B1": "uni20B1.136_230",
                                  "Adieresis": "Adieresis.136_230",
                                  "Udieresis": "Udieresis.136_230",
                                  "Adieresis.titl": "Adieresis.titl.136_230",
                                  "Udieresis.titl": "Udieresis.titl.136_230",
                                  "colonmonetary": "colonmonetary.136_230"}),
        ([{"wght": (0.424, 1)}], {"uni2761": "uni2761.79_230",
                                  "paragraph": "paragraph.79_230",
                                  "Odieresis.titl": "Odieresis.titl.106_230",
                                  "Odieresis": "Odieresis.106_230"}),
    ]
elif style == "Italic":
    condSubst = [
        # A list of (Region, Substitution) tuples.
        ([{"wght": (0.868, 1)}], {"uni20B5": "uni20B5.201_230",
                                  "cent": "cent.201_230",
                                  "colonmonetary": "colonmonetary.201_230",
                                  "dollar": "dollar.201_230",
                                  "uni20B2": "uni20B2.201_230",
                                  "dollar.tf": "dollar.tf.201_230",
                                  "cent.tf": "cent.tf.201_230"}),
        ([{"wght": (0.71, 1)}], {"uni20A6": "uni20A6.169_230",
                                 "peseta": "peseta.169_230",
                                 "uni20A9": "uni20A9.169_230"}),
        ([{"wght": (0.564, 1)}], {"uni20B1": "uni20B1.136_230",
                                  "colonmonetary": "colonmonetary.136_230"}),
        ([{"wght": (0.424, 1)}], {"uni2761": "uni2761.79_230",
                                  "paragraph": "paragraph.79_230"}),
    ]


addFeatureVariations(f, condSubst)

outputTTF = inputTTF.replace('.ttf', '-swap.ttf')
f.save(outputTTF)