docs/exts/docs_build/dev_index_generator.py

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# to you under the Apache License, Version 2.0 (the
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#
#   http://www.apache.org/licenses/LICENSE-2.0
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import argparse
import os
import sys
from glob import glob

import jinja2

from docs.exts.provider_yaml_utils import load_package_data

CURRENT_DIR = os.path.abspath(os.path.dirname(__file__))
DOCS_DIR = os.path.abspath(os.path.join(CURRENT_DIR, os.pardir, os.pardir))
BUILD_DIR = os.path.abspath(os.path.join(DOCS_DIR, '_build'))
ALL_PROVIDER_YAMLS = load_package_data()


def _get_jinja_env():
    loader = jinja2.FileSystemLoader(CURRENT_DIR, followlinks=True)
    env = jinja2.Environment(loader=loader, undefined=jinja2.StrictUndefined)
    return env


def _render_template(template_name, **kwargs):
    return _get_jinja_env().get_template(template_name).render(**kwargs)


def _render_content():
    provider_packages = [
        os.path.basename(os.path.dirname(p)) for p in glob(f"{BUILD_DIR}/docs/apache-airflow-providers-*/")
    ]
    providers = []
    for package_name in provider_packages:
        try:
            current_provider = next(
                provider_yaml
                for provider_yaml in ALL_PROVIDER_YAMLS
                if provider_yaml['package-name'] == package_name
            )
            providers.append(current_provider)
        except StopIteration:
            raise Exception(f"Could not find provider.yaml file for package: {package_name}")

    content = _render_template(
        'dev_index_template.html.jinja2', providers=sorted(providers, key=lambda k: k['package-name'])
    )
    return content


def generate_index(out_file: str) -> None:
    """
    Generates an index for development documentation.

    :param out_file: The path where the index should be stored
    """
    content = _render_content()
    with open(out_file, "w") as output_file:
        output_file.write(content)


if __name__ == '__main__':
    parser = argparse.ArgumentParser()
    parser.add_argument('outfile', nargs='?', type=argparse.FileType('w'), default=sys.stdout)
    args = parser.parse_args()
    args.outfile.write(_render_content())