Re: dh_python for single python scripts?

[Philippe Cerfon <philcerf@gmail.com>]

Hey Stefano.

(Thanks, also Andrey).

On Fri, Aug 16, 2024 at 9:47 AM Stefano Rivera <stefanor@debian.org> wrote:
> > Is that even intended to work with dh_python?
>
> dh_python doesn't care what form your python package is in. It just
> looks for the metadata in .dist-info / .egg-info.

Then there must be something I do wrong.
What I have is:
- src/my-script-file.py
  (yes, hyphens here, which would of course be bad if it were a
package - maybe this is the reason for my troubles?)
- pyproject.toml
    [project]
    name = "my-script"
    requires-python = ">=3.11"
    dynamic = ["version"]
    dependencies = [
                "numpy"
               ]

    [build-system]
    requires = ["setuptools>=61.0.0", "setuptools_scm[toml]>=6.2.0"]
    build-backend = "setuptools.build_meta"

    [tool.setuptools]
    script-files = ["src/my-script-file.py"]

    [tool.setuptools_scm]


At first I tried:
   [project.scripts]
   my-script = "my-script:main"
instead of the
   script-files = ["src/my-script-file.py"]

But that didn't really work (which I guess is no surprise) as
project.scripts expects a packge/module to load from, but my-script is
none.

With script-files = ["src/my-script-file.py"], the result from:
   python3 -m build --no-isolation
*does* include my script at, and the Debian package also places it in
/usr/bin - but I somehow get that my-script-file "into" Python.

"into Python" is what I wrote before, namely when I run ptpython and
use the completion of import my... it shows me my-script-file as if it
were a module.
So I think something is still wrong, but I cannot find out what.

With the above pyproject.toml, the Debian package would contain:
drwxr-xr-x root/root         0 2024-08-15 23:56 ./
drwxr-xr-x root/root         0 2024-08-15 23:56 ./usr/
drwxr-xr-x root/root         0 2024-08-15 23:56 ./usr/bin/
-rwxr-xr-x root/root    109240 2024-08-15 23:56 ./usr/bin/my-script-file.py
drwxr-xr-x root/root         0 2024-08-15 23:56 ./usr/lib/
drwxr-xr-x root/root         0 2024-08-15 23:56 ./usr/lib/python3/
drwxr-xr-x root/root         0 2024-08-15 23:56 ./usr/lib/python3/dist-packages/
drwxr-xr-x root/root         0 2024-08-15 23:56
./usr/lib/python3/dist-packages/my_script_file-1.0.0.dist-info/
-rw-r--r-- root/root         7 2024-08-15 23:56
./usr/lib/python3/dist-packages/my_script_file-1.0.0.dist-info/INSTALLER
-rw-r--r-- root/root      1824 2024-08-15 23:56
./usr/lib/python3/dist-packages/my_script_file-1.0.0.dist-info/METADATA
-rw-r--r-- root/root        91 2024-08-15 23:56
./usr/lib/python3/dist-packages/my_script_file-1.0.0.dist-info/WHEEL
-rw-r--r-- root/root         1 2024-08-15 23:56
./usr/lib/python3/dist-packages/my_script_file-1.0.0.dist-info/top_level.txt
drwxr-xr-x root/root         0 2024-08-15 23:56 ./usr/share/
drwxr-xr-x root/root         0 2024-08-15 23:56 ./usr/share/doc/
drwxr-xr-x root/root         0 2024-08-15 23:56 ./usr/share/doc/my-script-file/
-rw-r--r-- root/root       169 2024-08-15 23:56
./usr/share/doc/my-script-file/changelog.Debian.gz
-rw-r--r-- root/root      1373 2024-08-15 23:56
./usr/share/doc/my-script-file/copyright

So it retains the hypens, execpt for the dir in dist-packages, where
it replaces them with _.

It also generates a postinst:
    #!/bin/sh
    set -e

    # Automatically added by dh_python3
    if command -v py3compile >/dev/null 2>&1; then
        py3compile -p my-script-file
    fi
    if command -v pypy3compile >/dev/null 2>&1; then
        pypy3compile -p my-script-file  || true
    fi

    # End automatically added section

Which I guess makes no sense (as there is no such package), or does it?
And accordingly a prerm.

btw: When I rename the src/my-script-file.py to src/my-script-file (no
extension), then the contents of the .deb look the same, but the
postinst/prerm are gone.

Still I fail to understand, where that auto-completed my-script-file
comes from in ptpython.
Any ideas what I'm doing wrong?


> So, if your package declares dependencies in in the packaging, and
> installs correctly with python3-build, it'll work.

I had some stupid mistake in my pyproject.toml, after noticing that,
it correctly "auto-detected" the dependencies from that and translated
them into Debian package names :-)


Thanks,
Philippe