setup.py

from __future__ import print_function

from setuptools import setup, find_packages, Command
from setuptools.command.sdist import sdist
from setuptools.command.build_py import build_py
from setuptools.command.develop import develop
from setuptools.command.egg_info import egg_info
from setuptools.command.bdist_egg import bdist_egg

from subprocess import check_call

import os
import sys

try:
    from urllib.request import urlopen
except ImportError:
    from urllib import urlopen

from distutils import log

log.set_verbosity(log.DEBUG)

here = os.path.dirname(os.path.abspath(__file__))
node_root = os.path.join(here, 'js')
is_repo = os.path.exists(os.path.join(here, '.git'))

npm_path = os.pathsep.join([
    os.path.join(node_root, 'node_modules', '.bin'),
                os.environ.get('PATH', os.defpath),
])

def in_read_the_docs():
    return os.environ.get('READTHEDOCS') == 'True'

def js_first(command, strict=False):
    """decorator for building minified js/css prior to another command"""

    class DecoratedCommand(command):
        def run(self):
            jsdeps = self.distribution.get_command_obj('jsdeps')
            if not is_repo and all(os.path.exists(t) for t in jsdeps.targets):
                # sdist, nothing to do
                command.run(self)
                return

            try:
                self.distribution.run_command('jsdeps')
            except Exception as e:
                missing = [t for t in jsdeps.targets if not os.path.exists(t)]
                if strict or missing:
                    log.warn('rebuilding js and css failed')
                    if missing:
                        log.error('missing files: %s' % missing)
                    raise e
                else:
                    log.warn('rebuilding js and css failed (not a problem)')
                    log.warn(str(e))
            command.run(self)
            update_package_data(self.distribution)
    return DecoratedCommand

def update_package_data(distribution):
    """update package_data to catch changes during setup"""
    build_py = distribution.get_command_obj('build_py')
    # distribution.package_data = find_package_data()
    # re-init build_py options which load package_data
    build_py.finalize_options()


class NPM(Command):
    description = 'install package.json dependencies using npm'

    user_options = []

    node_modules = os.path.join(node_root, 'node_modules')

    template_root = os.path.join(here, 'share', 'jupyter', 'voila', 'templates', 'default', 'static')
    targets = [
        os.path.join(template_root, 'voila.js')
    ]

    def initialize_options(self):
        pass

    def finalize_options(self):
        pass

    def has_npm(self):
        try:
            check_call(['npm', '--version'])
            return True
        except:
            return False

    def should_run_npm_install(self):
        package_json = os.path.join(node_root, 'package.json')
        node_modules_exists = os.path.exists(self.node_modules)
        return self.has_npm()

    def run(self):
        if in_read_the_docs():
            log.warn(
                "Inside readthedocs -- skipping building JS dependencies.")
            return
        has_npm = self.has_npm()
        if not has_npm:
            log.error("`npm` unavailable.  If you're running this command using sudo, make sure `npm` is available to sudo")

        env = os.environ.copy()
        env['PATH'] = npm_path

        if self.should_run_npm_install():
            log.info('Installing build dependencies with npm.  This may take a while...')
            check_call(
                ['npm', 'install'],
                cwd=node_root,
                stdout=sys.stdout,
                stderr=sys.stderr
            )
            os.utime(self.node_modules, None)

        for t in self.targets:
            if not os.path.exists(t):
                msg = 'Missing file: %s' % t
                if not has_npm:
                    msg += '\nnpm is required to build a development version'
                raise ValueError(msg)

        # update package data in case this created new files
        # update_package_data(self.distribution)


jupyterlab_css_version = '0.1.0'
css_url = "https://unpkg.com/@jupyterlab/nbconvert-css@%s/style/index.css" % jupyterlab_css_version

theme_light_version = '0.19.1'
theme_light_url = "https://unpkg.com/@jupyterlab/theme-light-extension@%s/static/embed.css" % theme_light_version

theme_dark_version = '0.19.1'
theme_dark_url = "https://unpkg.com/@jupyterlab/theme-dark-extension@%s/static/embed.css" % theme_dark_version


class FetchCSS(Command):
    description = "Fetch Notebook CSS from CDN"
    user_options = []

    def initialize_options(self):
        pass

    def finalize_options(self):
        pass

    def _download(self, url):
        try:
            return urlopen(url).read()
        except Exception as e:
            if 'ssl' in str(e).lower():
                try:
                    import pycurl
                except ImportError:
                    print("Failed, try again after installing PycURL with `pip install pycurl` to avoid outdated SSL.", file=sys.stderr)
                    raise e
                else:
                    print("Failed, trying again with PycURL to avoid outdated SSL.", file=sys.stderr)
                    return self._download_pycurl(url)
            raise e

    def _download_pycurl(self, url):
        """Download CSS with pycurl, in case of old SSL (e.g. Python < 2.7.9)."""
        import pycurl
        c = pycurl.Curl()
        c.setopt(c.URL, url)
        buf = BytesIO()
        c.setopt(c.WRITEDATA, buf)
        c.perform()
        return buf.getvalue()

    def run(self):
        css_dest          = os.path.join('share', 'jupyter', 'voila', 'templates', 'default', 'static', 'index.css')
        theme_light_dest  = os.path.join('share', 'jupyter', 'voila', 'templates', 'default', 'static', 'theme-light.css')
        theme_dark_dest   = os.path.join('share', 'jupyter', 'voila', 'templates', 'default', 'static', 'theme-dark.css')

        try:
            css = self._download(css_url)
            theme_light = self._download(theme_light_url)
            theme_dark = self._download(theme_dark_url)
        except Exception as e:
            msg = "Failed to download CSS: %s" % e
            if os.path.exists(css_dest) and os.path.exists(theme_light_dest) and os.path.exists(theme_dark_dest):
                print("Already have CSS, moving on.")
            else:
                raise OSError("Need Notebook CSS to proceed.")
            return

        try:
            os.mkdir(os.path.join('share', 'jupyter', 'voila', 'templates', 'default', 'static'))
        except OSError:  # Use FileExistsError from python 3.3 onward.
            pass
        with open(css_dest, 'wb+') as f:
            f.write(css)
        with open(theme_light_dest, 'wb+') as f:
            f.write(theme_light)
        with open(theme_dark_dest, 'wb+') as f:
            f.write(theme_dark)

def css_first(command):
    class CSSFirst(command):
        def run(self):
            self.distribution.run_command('css')
            return command.run(self)
    return CSSFirst


class bdist_egg_disabled(bdist_egg):
    """Disabled version of bdist_egg

    Prevents setup.py install performing setuptools' default easy_install,
    which it should never ever do.
    """
    def run(self):
        sys.exit("Aborting implicit building of eggs. Use `pip install .` to install from source.")

cmdclass = {
    'css': FetchCSS,
    'jsdeps': NPM,
    'build_py': css_first(js_first(build_py)),
    'egg_info': css_first(js_first(egg_info)),
    'sdist': css_first(js_first(sdist, strict=True)),
    'develop' : css_first(develop),
    'bdist_egg': bdist_egg if 'bdist_egg' in sys.argv else bdist_egg_disabled
}

version_ns = {}
with open(os.path.join(here, 'voila', '_version.py')) as f:
    exec(f.read(), {}, version_ns)

data_files = [
    ('etc/jupyter/jupyter_server_config.d', ['etc/jupyter/jupyter_server_config.d/voila.json']),
    ('etc/jupyter/jupyter_notebook_config.d', ['etc/jupyter/jupyter_notebook_config.d/voila.json'])
]

# Add all the templates
for (dirpath, dirnames, filenames) in os.walk('share/jupyter/voila/templates/'):
    if filenames:
        data_files.append((dirpath, [os.path.join(dirpath, filename) for filename in filenames]))

setup_args = {
    'name': 'voila',
    'version': version_ns['__version__'],
    'description': 'Serving read-only live Jupyter notebooks',
    'packages': find_packages(),
    'zip_safe': False,
    'data_files': data_files,
    'cmdclass': cmdclass,
    'package_data': {
        'voila': [
            'static/*'
        ]
    },
    'entry_points': {
        'console_scripts': [
            'voila = voila.app:main'
        ]
    },
    'install_requires': [
        'jupyter_server>=0.0.5,<0.0.6',
        'nbconvert>=5.5.0,<6',
        'jupyterlab_pygments>=0.1.0,<0.2'
    ],
    'extras_require': {
        'test': [
            'mock',
            'pytest<4',
            'pytest-tornado5',
            'voila-gridstack'
        ]
    },
    'author': 'QuantStack',
    'author_email': 'info@quantstack.net',
    'keywords': [
        'ipython',
        'jupyter',
        'widgets',
    ]
}

setup(**setup_args)