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homepage/scripts/subset-emoji-font.sh
Alexander Bocken 716c6cc6e6
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fix: use python3 for emoji codepoint extraction in font subsetting
grep -oP '.' splits multi-byte emoji into individual bytes when the
locale is not UTF-8 (e.g. CI runners with LANG=C), causing pyftsubset
to fail on invalid codepoints.
2026-02-17 16:05:55 +01:00

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#!/usr/bin/env bash
# Subset NotoColorEmoji to only the emojis we actually use.
# Requires: fonttools (provides pyftsubset) and woff2 (provides woff2_compress)
#
# Source font: system-installed NotoColorEmoji.ttf
# Output: static/fonts/NotoColorEmoji.woff2 + .ttf
set -euo pipefail
SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
PROJECT_ROOT="$(dirname "$SCRIPT_DIR")"
OUT_DIR="$PROJECT_ROOT/static/fonts"
SRC_FONT="/usr/share/fonts/noto/NotoColorEmoji.ttf"
if [ ! -f "$SRC_FONT" ]; then
echo "Error: Source font not found at $SRC_FONT" >&2
exit 1
fi
# ─── Fixed list of emojis to include ────────────────────────────────
# Recipe icons (from database + hardcoded)
# Season/liturgical: ☀️ ✝️ ❄️ 🌷 🍂 🎄 🐇
# Food/recipe: 🍽️ 🥫
# UI/cospend categories: 🛒 🛍️ 🚆 ⚡ 🎉 🤝 💸
# Status/feedback: ❤️ 🖤 ✅ ❌ 🚀 ⚠️ ✨ 🔄
# Features: 📋 🖼️ 📖 🤖 🌐 🔐 🔍 🚫
EMOJIS="☀✝❄🌷🍂🎄🐇🍽🥫🛒🛍🚆⚡🎉🤝💸❤🖤✅❌🚀⚠✨🔄📋🖼📖🤖🌐🔐🔍🚫"
# ────────────────────────────────────────────────────────────────────
# Build Unicode codepoint list from the emoji string (Python for reliable Unicode handling)
UNICODES=$(python3 -c "print(','.join(f'U+{ord(c):04X}' for c in '$EMOJIS'))")
GLYPH_COUNT=$(python3 -c "print(len('$EMOJIS'))")
echo "Subsetting NotoColorEmoji with $GLYPH_COUNT glyphs..."
# Subset to TTF
pyftsubset "$SRC_FONT" \
--unicodes="$UNICODES" \
--output-file="$OUT_DIR/NotoColorEmoji.ttf" \
--no-ignore-missing-unicodes
# Convert to WOFF2
woff2_compress "$OUT_DIR/NotoColorEmoji.ttf"
ORIG_SIZE=$(stat -c%s "$SRC_FONT" 2>/dev/null || stat -f%z "$SRC_FONT")
TTF_SIZE=$(stat -c%s "$OUT_DIR/NotoColorEmoji.ttf" 2>/dev/null || stat -f%z "$OUT_DIR/NotoColorEmoji.ttf")
WOFF2_SIZE=$(stat -c%s "$OUT_DIR/NotoColorEmoji.woff2" 2>/dev/null || stat -f%z "$OUT_DIR/NotoColorEmoji.woff2")
echo "Done!"
echo " Original: $(numfmt --to=iec "$ORIG_SIZE")"
echo " TTF: $(numfmt --to=iec "$TTF_SIZE")"
echo " WOFF2: $(numfmt --to=iec "$WOFF2_SIZE")"