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Workaround nox's install only flag

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To get some information from the system, which we then use to choose the
appropriate static requirements file, we need to run some commands,
something that nox will refuse to do if `--install-only` is passed.

We work around it by manually patching the value of
`session._runner.global_config.install_only` for the commands that we
MUST run, and only those and then we set it back to the value it had
before.

For additional information about why we have to do this, please see:
   https://github.com/theacodes/nox/pull/181
This commit is contained in:
Pedro Algarvio 2019-06-14 13:07:49 +01:00
parent 8df7684637
commit 69e1d84525
No known key found for this signature in database
GPG key ID: BB36BF6584A298FF
1 changed files with 44 additions and 22 deletions
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66
noxfile.py
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@ -57,15 +57,22 @@ def _get_session_python_version_info(session):
try:
version_info = session._runner._real_python_version_info
except AttributeError:
session_py_version = session.run(
'python', '-c'
'import sys; sys.stdout.write("{}.{}.{}".format(*sys.version_info))',
silent=True,
log=False,
bypass_install_only=True
)
version_info = tuple(int(part) for part in session_py_version.split('.') if part.isdigit())
session._runner._real_python_version_info = version_info
old_install_only_value = session._runner.global_config.install_only
try:
# Force install only to be false for the following chunk of code
# For additional information as to why see:
# https://github.com/theacodes/nox/pull/181
session._runner.global_config.install_only = False
session_py_version = session.run(
'python', '-c'
'import sys; sys.stdout.write("{}.{}.{}".format(*sys.version_info))',
silent=True,
log=False,
)
version_info = tuple(int(part) for part in session_py_version.split('.') if part.isdigit())
session._runner._real_python_version_info = version_info
finally:
session._runner.global_config.install_only = old_install_only_value
return version_info
@ -73,14 +80,21 @@ def _get_session_python_site_packages_dir(session):
try:
site_packages_dir = session._runner._site_packages_dir
except AttributeError:
site_packages_dir = session.run(
'python', '-c'
'import sys; from distutils.sysconfig import get_python_lib; sys.stdout.write(get_python_lib())',
silent=True,
log=False,
bypass_install_only=True
)
session._runner._site_packages_dir = site_packages_dir
old_install_only_value = session._runner.global_config.install_only
try:
# Force install only to be false for the following chunk of code
# For additional information as to why see:
# https://github.com/theacodes/nox/pull/181
session._runner.global_config.install_only = False
site_packages_dir = session.run(
'python', '-c'
'import sys; from distutils.sysconfig import get_python_lib; sys.stdout.write(get_python_lib())',
silent=True,
log=False,
)
session._runner._site_packages_dir = site_packages_dir
finally:
session._runner.global_config.install_only = old_install_only_value
return site_packages_dir
@ -96,11 +110,19 @@ def _get_distro_info(session):
distro = session._runner._distro
except AttributeError:
# The distro package doesn't output anything for Windows
session.install('--progress-bar=off', 'distro', silent=PIP_INSTALL_SILENT)
output = session.run('distro', '-j', silent=True, bypass_install_only=True)
distro = json.loads(output.strip())
session.log('Distro information:\n%s', pprint.pformat(distro))
session._runner._distro = distro
old_install_only_value = session._runner.global_config.install_only
try:
# Force install only to be false for the following chunk of code
# For additional information as to why see:
# https://github.com/theacodes/nox/pull/181
session._runner.global_config.install_only = False
session.install('--progress-bar=off', 'distro', silent=PIP_INSTALL_SILENT)
output = session.run('distro', '-j', silent=True)
distro = json.loads(output.strip())
session.log('Distro information:\n%s', pprint.pformat(distro))
session._runner._distro = distro
finally:
session._runner.global_config.install_only = old_install_only_value
return distro