51 lines
2.4 KiB
Python
51 lines
2.4 KiB
Python
# We use a temporary venv to ensure we have all the external libraries we need.
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# This removes the necessity of extra libs at runtime. If you're in an environment that doesn't have access to PyPI/pip,
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# you'll need to customize the install host (typically the live CD/live USB) to have them installed as system packages.
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# Before you hoot and holler about this, Let's Encrypt's certbot-auto does the same thing.
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# Except I segregate it out even further; I don't even install pip into the system python.
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import ensurepip
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import json
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import os
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import tempfile
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import subprocess
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import sys
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import venv
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# TODO: a more consistent way of managing deps?
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depmods = ['gpg', 'requests', 'lxml', 'psutil', 'pyparted', 'pytz', 'passlib', 'validators']
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class EnvBuilder(object):
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def __init__(self):
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self.vdir = tempfile.mkdtemp(prefix = '.aif_', suffix = '_VENV')
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self.venv = venv.create(self.vdir, system_site_packages = True, clear = True, with_pip = True)
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ensurepip.bootstrap(root = self.vdir)
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# pip does some dumb env var things and doesn't clean up after itself.
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for v in ('PIP_CONFIG_FILE', 'ENSUREPIP_OPTIONS', 'PIP_REQ_TRACKER', 'PLAT'):
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if os.environ.get(v):
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del(os.environ[v])
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moddir_raw = subprocess.run([os.path.join(self.vdir,
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'bin',
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'python3'),
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'-c',
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('import site; '
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'import json; '
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'print(json.dumps(site.getsitepackages(), indent = 4))')],
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stdout = subprocess.PIPE)
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self.modulesdir = json.loads(moddir_raw.stdout.decode('utf-8'))[0]
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# This is SO. DUMB. WHY DO I HAVE TO CALL PIP FROM A SHELL. IT'S WRITTEN IN PYTHON.
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# https://pip.pypa.io/en/stable/user_guide/#using-pip-from-your-program
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# TODO: logging
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for m in depmods:
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pip_cmd = [os.path.join(self.vdir,
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'bin',
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'python3'),
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'-m',
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'pip',
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'install',
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'--disable-pip-version-check',
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m]
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subprocess.run(pip_cmd)
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# And now make it available to other components.
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sys.path.insert(1, self.modulesdir)
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