diskimage-builder/diskimage_builder/elements/pypi/pre-install.d/00-configure-pypi-mirror
Ian Wienand 97c01e48ed Move elements & lib relative to diskimage_builder package
Currently we have all our elements and library files in a top-level
directory and install them into
<root>/share/diskimage-builder/[elements|lib] (where root is either /
or the root of a virtualenv).

The problem with this is that editable/development installs (pip -e)
do *not* install data_files.  Thus we have no canonical location to
look for elements -- leading to the various odd things we do such as a
whole bunch of guessing at the top of disk-image-create and having a
special test-loader in tests/test_elements.py so we can run python
unit tests on those elements that have it.

data_files is really the wrong thing to use for what are essentially
assets of the program.  data_files install works well for things like
config-files, init.d files or dropping documentation files.

By moving the elements under the diskimage_builder package, we always
know where they are relative to where we import from.  In fact,
pkg_resources has an api for this which we wrap in the new
diskimage_builder/paths.py helper [1].

We use this helper to find the correct path in the couple of places we
need to find the base-elements dir, and for the paths to import the
library shell functions.

Elements such as svc-map and pkg-map include python unit-tests, which
we do not need tests/test_elements.py to special-case load any more.
They just get found automatically by the normal subunit loader.

I have a follow-on change (I69ca3d26fede0506a6353c077c69f735c8d84d28)
to move disk-image-create to a regular python entry-point.

Unfortunately, this has to move to work with setuptools.  You'd think
a symlink under diskimage_builder/[elements|lib] would work, but it
doesn't.

[1] this API handles stuff like getting files out of .zip archive
modules, which we don't do.  Essentially for us it's returning
__file__.

Change-Id: I5e3e3c97f385b1a4ff2031a161a55b231895df5b
2016-11-01 17:27:41 -07:00

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Python
Executable File

#!/usr/bin/env python
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
from __future__ import print_function
import os.path
def main():
home = os.path.expanduser("~")
backup_configs(home)
indices = []
if (os.environ.get('DIB_PYPI_MIRROR_URL') or
os.environ.get('PYPI_MIRROR_URL')):
candidates = [k for k in os.environ if
k.startswith('DIB_PYPI_MIRROR_URL')]
back_compat = [k for k in os.environ if
k.startswith('PYPI_MIRROR_URL')]
if len(back_compat) > 0:
print('DEPRECATION WARNING: Please use DIB_PYPI_MIRROR_URL* rather'
' than PYPI_MIRROR_URL*')
candidates += back_compat
indices = list(map(os.environ.get, sorted(candidates)))
else:
indices = ['file:///tmp/pypi']
print('WARNING: You are using the pypi element but no pypi mirror is '
'defined via the PYPI_MIRROR_URL env variable')
easy_index = indices[-1]
use_pypi_python_org = True
if os.environ.get('DIB_OFFLINE'):
use_pypi_python_org = False
if os.environ.get('DIB_NO_PYPI_PIP'):
use_pypi_python_org = False
if use_pypi_python_org:
indices.append('https://pypi.python.org/simple')
retries = os.environ.get('DIB_PIP_RETRIES')
with file(home + '/.pip/pip.conf', 'wt') as output:
output.write('[global]\n')
output.write('log = %s/pip.log\n' % (home,))
output.write('index-url = %s\n' % (indices[0],))
if retries is not None:
output.write('retries = %s\n' % retries)
for index in indices[1:]:
output.write('extra-index-url = %s\n' % (index,))
with file(home + '/.pydistutils.cfg', 'wt') as output:
output.write('[easy_install]\n')
output.write('index_url = %s\n' % (easy_index,))
def backup_configs(home):
pip_dir = home + '/.pip'
if not os.path.exists(pip_dir):
os.mkdir(pip_dir)
if os.path.exists(pip_dir + '/pip.conf'):
os.rename(pip_dir + '/pip.conf', pip_dir + '/pip.conf.orig')
if os.path.exists(home + '/.pydistutils.cfg'):
os.rename(home + '/.pydistutils.cfg', home + '/.pydistutils.cfg.orig')
if __name__ == '__main__':
main()