1 internet doctest failing in src/sage/tests/cmdline.py - ore_algebra version

[slabbe]

On Ubuntu 18.04, running SageMath version 9.3.beta8, Release Date: 2021-03-07, the command

sage -t --optional=sage,internet src/sage/tests/cmdline.py

gives

sage -t --warn-long 74.8 --random-seed=0 src/sage/tests/cmdline.py
**********************************************************************
File "src/sage/tests/cmdline.py", line 606, in sage.tests.cmdline.test_executable
Failed example:
    err  # optional - internet
Expected:
    ''
Got:
    '/home/slabbe/GitBox/sage/local/lib/python3.8/site-packages/sage/misc
/package.py:114: UserWarning: failed to fetch the version of 
pkg=\'ore_algebra\' at https://pypi.org/pypi/ore_algebra/json\n  
warnings.warn("failed to fetch the version of pkg={!r} at {}".format(pkg,
 url))\n'
**********************************************************************
1 item had failures:
   1 of 229 in sage.tests.cmdline.test_executable
    [228 tests, 1 failure, 28.69 s]
----------------------------------------------------------------------
sage -t --warn-long 74.8 --random-seed=0 src/sage/tests/cmdline.py  # 1 doctest failed
----------------------------------------------------------------------

The complete failing example block is:

        sage: (out, err, ret) = test_executable(["sage", "--optional"])  # optional - internet
        sage: out.find("database_cremona_ellcurve") >= 0  # optional - internet
        True
        sage: err  # optional - internet
        ''
        sage: ret  # optional - internet
        0

I can reproduce the problem as follows:

sage: from sage.tests.cmdline import test_executable                                                 
sage: (out, err, ret) = test_executable(["sage", "--optional"])                                      
sage: out.find("database_cremona_ellcurve") >= 0                                                     
True
sage: err                                                                                            
'/home/slabbe/GitBox/sage/local/lib/python3.8/site-packages/sage/misc
/package.py:114: UserWarning: failed to fetch the version of 
pkg=\'ore_algebra\' at https://pypi.org/pypi/ore_algebra/json\n  
warnings.warn("failed to fetch the version of pkg={!r} at {}".format(pkg, 
url))\n'

[slabbe]

Salut Samuel, ça ressemble à du code qu'on avait changé dans un autre ticket. Ça te dit quelque chose?

[mkoeppe]

This can be fixed by convincing the author of the ore_algebra package to make a proper release on PyPI and then updating build/pkgs/ore_algebra/requirements.txt

[tmonteil]

Replying to mkoeppe:

This can be fixed by convincing the author of the ore_algebra package to make a proper release on PyPI and then updating build/pkgs/ore_algebra/requirements.txt

Let me add them in CC.

We could also stop assuming that pip installed package come from PyPI, which offers more flexibility to downstream.

[mkoeppe]

Sage development has entered the release candidate phase for 9.3. Setting a new milestone for this ticket based on a cursory review of ticket status, priority, and last modification date.