Typically build the CBDT then the COLRv1 as COLRv1 copies some information from CBDT.
rm -rf venv # in case you have an old borked venv! python3 -m venv venv source venv/bin/activate pip install -r requirements.txt python size_check.py rm -rf build/ && time make -j 48 # Should take 2-3 minutes to create noto-emoji/NotoColorEmoji.ttf mv *.ttf fonts/
# If you are updating to a new Unicode rev, update configs python colrv1_generate_configs.py git diff colrv1/*.toml # Compile the fonts (cd colrv1 && rm -rf build/ && time nanoemoji *.toml) cp colrv1/build/NotoColorEmoji.ttf fonts/Noto-COLRv1.ttf cp colrv1/build/NotoColorEmoji-noflags.ttf fonts/Noto-COLRv1-noflags.ttf # Post-process them python colrv1_postproc.py
# Add support for new sequences per https://github.com/googlefonts/emojicompat#support-new-unicode-sequences # Install https://github.com/googlefonts/emojicompat in a venv # Create emojicompat versions of the fonts you made # Starting from the root of noto-emoji-next: $ pushd fonts $ cp NotoColorEmoji.ttf NotoColorEmoji-emojicompat.ttf $ cp Noto-COLRv1.ttf Noto-COLRv1-emojicompat.ttf $ emojicompat --op setup --font NotoColorEmoji-emojicompat.ttf $ emojicompat --op setup --font Noto-COLRv1-emojicompat.ttf $ emojicompat --op check --font NotoColorEmoji-emojicompat.ttf $ emojicompat --op check --font Noto-COLRv1-emojicompat.ttf # The emojicompat --op check step should print something akin to: 3835 items_by_codepoints 0 PUA missing 0 PUA point at wrong glyph 3835 PUA correct 0 Emji entries did NOT match a glyph
$ hb-subset --unicodes-file=flags-only-unicodes.txt \ --output-file=fonts/NotoColorEmoji-flagsonly.ttf \ fonts/NotoColorEmoji.ttf $ python update_flag_name.py