This is the repository for the online module Bots as Digital Infrapuncture, commissioned by the Utrecht University
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.

143 lines
4.7 KiB

"""Build Environment used for isolation during sdist building
"""
import logging
import os
import sys
from distutils.sysconfig import get_python_lib
from sysconfig import get_paths
from pip._vendor.pkg_resources import Requirement, VersionConflict, WorkingSet
from pip._internal.utils.misc import call_subprocess
from pip._internal.utils.temp_dir import TempDirectory
from pip._internal.utils.ui import open_spinner
logger = logging.getLogger(__name__)
class BuildEnvironment(object):
"""Creates and manages an isolated environment to install build deps
"""
def __init__(self):
self._temp_dir = TempDirectory(kind="build-env")
self._temp_dir.create()
@property
def path(self):
return self._temp_dir.path
def __enter__(self):
self.save_path = os.environ.get('PATH', None)
self.save_pythonpath = os.environ.get('PYTHONPATH', None)
self.save_nousersite = os.environ.get('PYTHONNOUSERSITE', None)
install_scheme = 'nt' if (os.name == 'nt') else 'posix_prefix'
install_dirs = get_paths(install_scheme, vars={
'base': self.path,
'platbase': self.path,
})
scripts = install_dirs['scripts']
if self.save_path:
os.environ['PATH'] = scripts + os.pathsep + self.save_path
else:
os.environ['PATH'] = scripts + os.pathsep + os.defpath
# Note: prefer distutils' sysconfig to get the
# library paths so PyPy is correctly supported.
purelib = get_python_lib(plat_specific=0, prefix=self.path)
platlib = get_python_lib(plat_specific=1, prefix=self.path)
if purelib == platlib:
lib_dirs = purelib
else:
lib_dirs = purelib + os.pathsep + platlib
if self.save_pythonpath:
os.environ['PYTHONPATH'] = lib_dirs + os.pathsep + \
self.save_pythonpath
else:
os.environ['PYTHONPATH'] = lib_dirs
os.environ['PYTHONNOUSERSITE'] = '1'
return self.path
def __exit__(self, exc_type, exc_val, exc_tb):
def restore_var(varname, old_value):
if old_value is None:
os.environ.pop(varname, None)
else:
os.environ[varname] = old_value
restore_var('PATH', self.save_path)
restore_var('PYTHONPATH', self.save_pythonpath)
restore_var('PYTHONNOUSERSITE', self.save_nousersite)
def cleanup(self):
self._temp_dir.cleanup()
def missing_requirements(self, reqs):
"""Return a list of the requirements from reqs that are not present
"""
missing = []
with self:
ws = WorkingSet(os.environ["PYTHONPATH"].split(os.pathsep))
for req in reqs:
try:
if ws.find(Requirement.parse(req)) is None:
missing.append(req)
except VersionConflict:
missing.append(req)
return missing
def install_requirements(self, finder, requirements, message):
args = [
sys.executable, '-m', 'pip', 'install', '--ignore-installed',
'--no-user', '--prefix', self.path, '--no-warn-script-location',
]
if logger.getEffectiveLevel() <= logging.DEBUG:
args.append('-v')
for format_control in ('no_binary', 'only_binary'):
formats = getattr(finder.format_control, format_control)
args.extend(('--' + format_control.replace('_', '-'),
','.join(sorted(formats or {':none:'}))))
if finder.index_urls:
args.extend(['-i', finder.index_urls[0]])
for extra_index in finder.index_urls[1:]:
args.extend(['--extra-index-url', extra_index])
else:
args.append('--no-index')
for link in finder.find_links:
args.extend(['--find-links', link])
for _, host, _ in finder.secure_origins:
args.extend(['--trusted-host', host])
if finder.allow_all_prereleases:
args.append('--pre')
if finder.process_dependency_links:
args.append('--process-dependency-links')
args.append('--')
args.extend(requirements)
with open_spinner(message) as spinner:
call_subprocess(args, show_stdout=False, spinner=spinner)
class NoOpBuildEnvironment(BuildEnvironment):
"""A no-op drop-in replacement for BuildEnvironment
"""
def __init__(self):
pass
def __enter__(self):
pass
def __exit__(self, exc_type, exc_val, exc_tb):
pass
def cleanup(self):
pass
def install_requirements(self, finder, requirements, message):
raise NotImplementedError()