build.py

#!/usr/bin/env python3
# Copyright 2020 Google LLC
#
# 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.

# Rebuild samples whose configurations are specified on cli
# Example:
#     ./build.py config/twemoji-*

from pathlib import Path
import os
import shutil
import subprocess
import sys
import time

_CONFIG_DIR = Path("config")


def main():
    toml_files = []
    py_scripts = []
    config_list = sys.argv[1:]
    no_args = len(config_list) == 0
    if no_args:
        config_list.extend(tuple(_CONFIG_DIR.glob("*.toml")))
        config_list.extend(tuple(_CONFIG_DIR.glob("*.py")))

    for config in config_list:
        config = Path(config)
        if config.suffix == ".toml":
            toml_files.append(config)
        elif config.suffix == ".py":
            py_scripts.append(config)
        else:
            raise ValueError(f"Not sure how to handle {config}")

    build_dir = Path("build")
    font_dir = Path("fonts")
    os.makedirs(font_dir, exist_ok = True)

    def nanoemoji_cmd(*configs):
        return ("nanoemoji", *(str(config) for config in configs))

    def py_cmd(config):
        return (sys.executable, str(config.resolve()), str(build_dir.resolve()))

    for (build_cmd, configs) in (
        [(nanoemoji_cmd, toml_files)] if toml_files else []
    ) + [(py_cmd, (script,)) for script in py_scripts]:
        cmd = build_cmd(*configs)
        print(" ".join(cmd))  # very useful on failure
        before_rmtree = time.monotonic()
        if build_dir.exists():
            shutil.rmtree(build_dir)
        after_rmtree = time.monotonic()
        subprocess.run(cmd, check=True)
        after_run = time.monotonic()
        font_files = tuple(build_dir.glob("*.[ot]tf"))
        assert len(font_files) >= 1
        for font_file in font_files:
            src, dst = font_file, font_dir / font_file.name
            shutil.copy(src, dst)
        print(f"{after_rmtree - before_rmtree:.1f}s to delete build/")
        print(f"{after_run - after_rmtree:.1f}s to run {' '.join(cmd)}")


if __name__ == "__main__":
    main()