tempita dependency is abandonware and doesn't build on Setuptools v58.0.0

[Nicola Soranzo]

sqlalchemy-migrate has a dependency on Tempita ( https://pypi.org/project/Tempita/ ), which is abandoware (last release was in 2013). Tempita uses the use_2to3=True option of setup() in its setup.py , a features which Setuptools has removed in v58.0.0 ( https://github.com/pypa/setuptools/blob/main/CHANGES.rst#v5800 ).

As a consequence, Tempita is installed with Python2 syntax under Python3 and breaks sqlalchemy-migrate:

from tempita import Template as TempitaTemplate
E File "/home/runner/work/galaxy/galaxy/galaxy root/.venv/lib/python3.7/site-packages/tempita/__init__.py", line 295
E except SyntaxError, e:
E ^
E SyntaxError: invalid syntax

[Michael Howitz (mh-gocept)]

This issue prevents from installing `sqlalchemy-migrate` on a new machine using a relatively recent setuptools version.

Are there any ideas or plans to fix this issue?

[Nicola Soranzo (nsoranzo)]

@mh-gocept How are you trying to install sqlalchemy-migrate? A wheel for Tempita 0.5.2 was added to PyPI in September 2021, see https://github.com/pypa/setuptools/issues/2788#issuecomment-921962154
So `pip install sqlalchemy-migrate` works fine for me currently, unless you are using the `--no-binary` option:

```
soranzon@n140522:/tmp$ rm -rf ~/.cache/pip
soranzon@n140522:/tmp$ virtualenv sqlam_venv
created virtual environment CPython3.8.10.final.0-64 in 84ms
  creator CPython3Posix(dest=/tmp/sqlam_venv, clear=False, global=False)
  seeder FromAppData(download=False, pip=latest, setuptools=latest, wheel=latest, pkg_resources=latest, via=copy, app_data_dir=/usr/users/ga002/soranzon/.local/share/virtualenv/seed-app-data/v1.0.1.debian.1)
  activators BashActivator,CShellActivator,FishActivator,PowerShellActivator,PythonActivator,XonshActivator
soranzon@n140522:/tmp$ . sqlam_venv/bin/activate
(sqlam_venv) soranzon@n140522:/tmp$ pip install --upgrade pip setuptools
Collecting pip
  Downloading pip-22.0.3-py3-none-any.whl (2.1 MB)
     |████████████████████████████████| 2.1 MB 4.3 MB/s
Collecting setuptools
  Downloading setuptools-60.8.2-py3-none-any.whl (1.1 MB)
     |████████████████████████████████| 1.1 MB 5.0 MB/s
Installing collected packages: pip, setuptools
  Attempting uninstall: pip
    Found existing installation: pip 20.0.2
    Uninstalling pip-20.0.2:
      Successfully uninstalled pip-20.0.2
  Attempting uninstall: setuptools
    Found existing installation: setuptools 44.0.0
    Uninstalling setuptools-44.0.0:
      Successfully uninstalled setuptools-44.0.0
Successfully installed pip-22.0.3 setuptools-60.8.2
(sqlam_venv) soranzon@n140522:/tmp$ pip install --no-binary :all: sqlalchemy-migrate
Collecting sqlalchemy-migrate
  Downloading sqlalchemy-migrate-0.13.0.tar.gz (131 kB)
     ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 131.4/131.4 KB 3.8 MB/s eta 0:00:00
  Preparing metadata (setup.py) ... done
Collecting pbr>=1.8
  Downloading pbr-5.8.1.tar.gz (127 kB)
     ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 127.5/127.5 KB 4.5 MB/s eta 0:00:00
  Preparing metadata (setup.py) ... done
Collecting SQLAlchemy>=0.9.6
  Downloading SQLAlchemy-1.4.31.tar.gz (8.0 MB)
     ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 8.0/8.0 MB 4.5 MB/s eta 0:00:00
  Preparing metadata (setup.py) ... done
Collecting decorator
  Downloading decorator-5.1.1.tar.gz (35 kB)
  Preparing metadata (setup.py) ... done
Collecting six>=1.7.0
  Downloading six-1.16.0.tar.gz (34 kB)
  Preparing metadata (setup.py) ... done
Collecting sqlparse
  Downloading sqlparse-0.4.2.tar.gz (67 kB)
     ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 67.8/67.8 KB 4.2 MB/s eta 0:00:00
  Preparing metadata (setup.py) ... done
Collecting Tempita>=0.4
  Downloading Tempita-0.5.2.tar.gz (12 kB)
  Preparing metadata (setup.py) ... error
  error: subprocess-exited-with-error

  × python setup.py egg_info did not run successfully.
  │ exit code: 1
  ╰─> [1 lines of output]
      error in Tempita setup command: use_2to3 is invalid.
      [end of output]

  note: This error originates from a subprocess, and is likely not a problem with pip.
error: metadata-generation-failed

× Encountered error while gene...

[Michael Howitz (mh-gocept)]

@nsoranzo Thank you for the heads-up on this issue.
I am using `zc.buildout` to install the dependencies and it does not seem to pick up the wheel but still uses the sdist. But I now have an idea how to tackle this problem locally. Thanks.