mirror of
https://github.com/jupyterhub/the-littlest-jupyterhub.git
synced 2025-12-18 21:54:05 +08:00
143 lines
4.0 KiB
Python
143 lines
4.0 KiB
Python
"""
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Bootstrap an installation of TLJH.
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Sets up just enough TLJH environments to invoke tljh.installer.
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This script is run as:
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curl <script-url> | sudo python3 -
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Constraints:
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- Be compatible with Python 3.4 (since we support Ubuntu 16.04)
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- Use stdlib modules only
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"""
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import os
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import subprocess
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import urllib.request
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import contextlib
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import hashlib
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import tempfile
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import sys
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def md5_file(fname):
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"""
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Return md5 of a given filename
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Copied from https://stackoverflow.com/a/3431838
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"""
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hash_md5 = hashlib.md5()
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with open(fname, "rb") as f:
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for chunk in iter(lambda: f.read(4096), b""):
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hash_md5.update(chunk)
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return hash_md5.hexdigest()
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def check_miniconda_version(prefix, version):
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"""
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Return true if a miniconda install with version exists at prefix
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"""
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try:
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return subprocess.check_output([
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os.path.join(prefix, 'bin', 'conda'),
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'-V'
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]).decode().strip() == 'conda {}'.format(version)
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except (subprocess.CalledProcessError, FileNotFoundError):
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# Conda doesn't exist, or wrong version
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return False
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@contextlib.contextmanager
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def download_miniconda_installer(version, md5sum):
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"""
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Context manager to download miniconda installer of given version.
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This should be used as a contextmanager. It downloads miniconda installer
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of given version, verifies the md5sum & provides path to it to the `with`
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block to run.
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"""
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with tempfile.NamedTemporaryFile() as f:
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installer_url = "https://repo.continuum.io/miniconda/Miniconda3-{}-Linux-x86_64.sh".format(version)
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urllib.request.urlretrieve(installer_url, f.name)
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if md5_file(f.name) != md5sum:
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raise Exception('md5 hash mismatch! Downloaded file corrupted')
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yield f.name
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def install_miniconda(installer_path, prefix):
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"""
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Install miniconda with installer at installer_path under prefix
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"""
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subprocess.check_output([
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'/bin/bash',
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installer_path,
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'-u', '-b',
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'-p', prefix
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], stderr=subprocess.STDOUT)
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def pip_install(prefix, packages, editable=False):
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"""
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Install pip packages in the conda environment under prefix.
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Packages are upgraded if possible.
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Set editable=True to add '--editable' to the pip install commandline.
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Very useful when doing active development
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"""
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flags = ['--upgrade']
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if editable:
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flags.append('--editable')
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subprocess.check_output([
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os.path.join(prefix, 'bin', 'python3'),
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'-m', 'pip',
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'install',
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] + flags + packages)
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def main():
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install_prefix = os.environ.get('TLJH_INSTALL_PREFIX', '/opt/tljh')
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hub_prefix = os.path.join(install_prefix, 'hub')
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miniconda_version = '4.5.4'
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miniconda_installer_md5 = "a946ea1d0c4a642ddf0c3a26a18bb16d"
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print('Checking if TLJH is already installed...')
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if not check_miniconda_version(hub_prefix, miniconda_version):
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initial_setup = True
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print('Downloading & setting up hub environment...')
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with download_miniconda_installer(miniconda_version, miniconda_installer_md5) as installer_path:
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install_miniconda(installer_path, hub_prefix)
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print('Hub environment set up!')
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else:
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initial_setup = False
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print('TLJH is already installed, will try to upgrade')
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if initial_setup:
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print('Setting up TLJH installer...')
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else:
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print('Upgrading TLJH installer...')
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is_dev = os.environ.get('TLJH_BOOTSTRAP_DEV', 'no') == 'yes'
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tljh_repo_path = os.environ.get(
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'TLJH_BOOTSTRAP_PIP_SPEC',
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'git+https://github.com/yuvipanda/the-littlest-jupyterhub.git'
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)
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pip_install(hub_prefix, [tljh_repo_path], editable=is_dev)
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print('Starting TLJH installer...')
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os.execv(
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os.path.join(hub_prefix, 'bin', 'python3'),
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[
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os.path.join(hub_prefix, 'bin', 'python3'),
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'-m',
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'tljh.installer',
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] + sys.argv[1:]
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)
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if __name__ == '__main__':
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main()
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