Synthesize zero feature in NL fonts.

sharpjs · sharpjs · commit d4e8bf03eb66 · 2020-11-08T08:39:16.000-08:00
diff --git a/build.sh b/build.sh
@@ -34,7 +34,7 @@ apk update
 apk upgrade
 apk add zip
 python -m pip install --upgrade pip
-pip install opentype-feature-freezer
+pip install fonttools opentype-feature-freezer
 
 # -----------------------------------------------------------------------------
 # Phase 1: Acquire Input
@@ -51,6 +51,12 @@ echo "Downloading $SRC_URL"
 echo "Unpacking $SRC_ZIP"
 unzip -j "$SRC_ZIP" "*.ttf" "*.txt"
 
+# Add zero feature to NL fonts
+for src in *NL-*.ttf; do
+  echo "$src <- zero feature"
+  fonttools feaLib -o "$src" /src/zero.fea "$src"
+done
+
 # -----------------------------------------------------------------------------
 # Phase 2: Input -> Output
 
diff --git a/zero.fea b/zero.fea
@@ -0,0 +1,19 @@
+# Zero Feature for JetBrains Mono Slashed
+# Copyright 2020 Subatomix Research Inc
+# SPDX-License-Identifier: Apache-2.0
+# 
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+feature zero {
+    substitute zero by zero.zero;
+} zero;
