Howdy all,
How can I specify to Pybuild that an application should have its modules
all in a private namespace, but have the Distutils metadata also
available to `pkg_resources` queries?
I install its libraries to an application-specific space with
`PYBUILD_INSTALL_ARGS = --install-lib=/usr/share/foo/`::
$ find /usr/share/FooApp/
/usr/share/FooApp/
/usr/share/FooApp/lorem
/usr/share/FooApp/lorem/__init__.py
/usr/share/FooApp/lorem/dolor.py
/usr/share/FooApp/lorem/sit.py
/usr/share/FooApp/lorem/amet.py
/usr/share/FooApp/FooApp-1.2.3.egg-info
/usr/share/FooApp/FooApp-1.2.3.egg-info/PKG-INFO
/usr/share/FooApp/FooApp-1.2.3.egg-info/requires.txt
/usr/share/FooApp/FooApp-1.2.3.egg-info/entry_points.txt
/usr/share/FooApp/FooApp-1.2.3.egg-info/not-zip-safe
/usr/share/FooApp/FooApp-1.2.3.egg-info/dependency_links.txt
/usr/share/FooApp/FooApp-1.2.3.egg-info/top_level.txt
/usr/share/FooApp/ipsum
/usr/share/FooApp/ipsum/__init__.py
/usr/share/FooApp/ipsum/consecteur.py
/usr/share/FooApp/ipsum/adipiscing.py
/usr/share/FooApp/ipsum/elit.py
(The actual code base is a fork of ‘dput’ to modernise its packaging
<URL:https://notabug.org/bignose/dput/> and Python idioms.)
The application's Python package is managed like other operating system
files, but is not in the general Python namespace for other programs to
import. Good.
The application has “console scripts” defined in the Distutils
`entry_points` mapping:
$ cat ./setup.py
[…]
entry_points={
'console_scripts': [
"foo=FooApp.foo:main",
],
},
[…]
which installs command-line programs at `/usr/bin/foo`, for example.
Good.
The distribution metadata (the `FooApp-1.2.3.egg-info` directory) is
also installed to the private directory though, which makes it invisible
to `pkg_resources`:
$ /usr/bin/foo
Traceback (most recent call last):
File "/usr/bin/foo", line 5, in <module>
from pkg_resources import load_entry_point
File "/usr/lib/python2.7/dist-packages/pkg_resources/__init__.py", line
3084, in <module>
@_call_aside
File "/usr/lib/python2.7/dist-packages/pkg_resources/__init__.py", line
3070, in _call_aside
f(*args, **kwargs)
File "/usr/lib/python2.7/dist-packages/pkg_resources/__init__.py", line
3097, in _initialize_master_working_set
working_set = WorkingSet._build_master()
File "/usr/lib/python2.7/dist-packages/pkg_resources/__init__.py", line
651, in _build_master
ws.require(__requires__)
File "/usr/lib/python2.7/dist-packages/pkg_resources/__init__.py", line
952, in require
needed = self.resolve(parse_requirements(requirements))
File "/usr/lib/python2.7/dist-packages/pkg_resources/__init__.py", line
839, in resolve
raise DistributionNotFound(req, requirers)
pkg_resources.DistributionNotFound: The FooApp==1.2.3' distribution was not
found and is required by the application
Other queries to `pkg_resources` for this application's distribution,
for example to get the distribution version or homepage URL, will also
fail.
How can I have Pybuild specify to Distutils that the application's
library modules should be installed away from the public namespace and
not available for general import, but also that the `pkg_resources`
functionality should find the distribution metadata where expected?
--
\ “When I was a kid I used to pray every night for a new bicycle. |
`\ Then I realised that the Lord doesn't work that way so I stole |
_o__) one and asked Him to forgive me.” —Emo Philips |
Ben Finney
