Autocomplete after the eol command

[romainx]

Hello,

This is a draft to resolve #125.
As the project is using argparse, I thought it was a good idea to use argcomplete.
This implementation is very simple but it seems to do the trick.

# register eol with the shell's completion framework by running register-python-argcomplete:
eval "$(register-python-argcomplete eol)"
# use it
eol ne
nextcloud  nextjs  netbsd  nexus  neo4j  neos  --    

Cheers 🍰

[hugovk]

Thanks for this!

# register eol with the shell's completion framework by running register-python-argcomplete:
eval "$(register-python-argcomplete my-python-app)"
# use it
eol ne
nextcloud  nextjs  netbsd  nexus  neo4j  neos  --    

Is my-python-app correct here?

[romainx]

Hello

Is my-python-app correct here?

Sorry no 😓 , it should be replaced by eol. Fixed in the PR description.

[hugovk]

Thanks, so does the eval need to be run just once, or once per new shell or something?

[romainx]

@hugovk the use of eval is for one time activation (for the current shell), there are several options that are nicely described in the pytest documentation for bash completion.
I pushed a commit to support global completion.

[hugovk]

The eval works for me, but I've run activate-global-python-argcomplete (on macOS with iterm2):

❯ activate-global-python-argcomplete
Defaulting to system-wide installation.
Installing /Library/Frameworks/Python.framework/Versions/3.13/lib/python3.13/site-packages/argcomplete/bash_completion.d/_python-argcomplete to /opt/homebrew/share/zsh/site-functions/_python-argcomplete...
Installed.
Installing /Library/Frameworks/Python.framework/Versions/3.13/lib/python3.13/site-packages/argcomplete/bash_completion.d/_python-argcomplete to /opt/homebrew/etc/bash_completion.d/python-argcomplete...
Installed.
Please restart your shell or source the installed file to activate it.

And opened a new shell, but it's not completing:

❯ eol ne

Do you know why?

[romainx]

Works on my side on new shell but only after I added the flag # PYTHON_ARGCOMPLETE_OK in the code (cli.py). Have you pulled this commit to perform your test?

Instead, the shell will look for the string PYTHON_ARGCOMPLETE_OK in the first 1024 bytes of any executable that it's running completion for, and if it's found, follow the rest of the argcomplete protocol as described above.
--source

[hugovk]

Yes:

❯ head --lines 2 src/norwegianblue/cli.py
#!/usr/bin/env python3
# PYTHON_ARGCOMPLETE_OK

❯ pip install -e . --quiet

❯ eol ne<tab>

New terminal tab:

❯ eol ne<tab>

[romainx]

Sorry for that. The script python-argcomplete is located on my side at:

• /usr/local/share/zsh/site-functions/_python-argcomplete for zsh
• /usr/local/etc/bash_completion.d/python-argcomplete for bash

Seems that on your side it's installed at the following locations:

• /opt/homebrew/share/zsh/site-functions/_python-argcomplete for zsh
• /opt/homebrew/etc/bash_completion.d/python-argcomplete for bash

Could you please try to source the one corresponding to your shell to check if it exists and if it solves the problem?

source /opt/homebrew/share/zsh/site-functions/_python-argcomplete

[hugovk]

Sorry for that. The script python-argcomplete is located on my side at:

• /usr/local/share/zsh/site-functions/_python-argcomplete for zsh
• /usr/local/etc/bash_completion.d/python-argcomplete for bash

Seems that on your side it's installed at the following locations:

• /opt/homebrew/share/zsh/site-functions/_python-argcomplete for zsh
• /opt/homebrew/etc/bash_completion.d/python-argcomplete for bash

That's right.

Could you please try to source the one corresponding to your shell to check if it exists and if it solves the problem?

source /opt/homebrew/share/zsh/site-functions/_python-argcomplete

Yes, that works.

[romainx]

I don't know why it is not sourced automatically by your shell 🤔?

[hugovk]

I've no idea...

python3.13 is the default interpreter on this machine, I also have:

❯ locate _python-argcomplete
/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/site-packages/argcomplete/bash_completion.d/_python-argcomplete
/Library/Frameworks/Python.framework/Versions/3.12/lib/python3.12/site-packages/argcomplete/bash_completion.d/_python-argcomplete
/Library/Frameworks/Python.framework/Versions/3.13/lib/python3.13/site-packages/argcomplete/bash_completion.d/_python-argcomplete
/opt/homebrew/Cellar/pipx/1.6.0/libexec/lib/python3.12/site-packages/argcomplete/bash_completion.d/_python-argcomplete
/opt/homebrew/share/zsh/site-functions/_python-argcomplete

activate-global-python-argcomplete on my path is for 3.13:

❯ which activate-global-python-argcomplete
/Library/Frameworks/Python.framework/Versions/3.13/bin/activate-global-python-argcomplete

But when I run it, it installs from 3.13 to a Homebrew path:

❯ activate-global-python-argcomplete
Defaulting to system-wide installation.
Installing /Library/Frameworks/Python.framework/Versions/3.13/lib/python3.13/site-packages/argcomplete/bash_completion.d/_python-argcomplete to /opt/homebrew/share/zsh/site-functions/_python-argcomplete...
Installed.
Installing /Library/Frameworks/Python.framework/Versions/3.13/lib/python3.13/site-packages/argcomplete/bash_completion.d/_python-argcomplete to /opt/homebrew/etc/bash_completion.d/python-argcomplete...
Installed.
Please restart your shell or source the installed file to activate it.

I don't use Homebrew Python for anything other than letting Homebrew manage it for its own use, so it feels like a bug that the 3.13 activate-global-python-argcomplete installs completion for another interpreter, let alone the Homebrew one.

Anyway, it also works if I source that 3.13 one in a new tab. What do you suggest? Should I add manual sourcing of that to my ~/.zshrc or something?

[romainx]

zsh

From this helper.

Completion functions for commands are stored in files with names beginning with an underscore _, and these files should be placed in a directory listed in the $fpath variable. You can add a directory to $fpath by adding a line like this to your ~/.zshrc file:

So you can check if your fpath variable contains the location of the autocomplete script installation.

echo $fpath | grep /opt/homebrew/share/zsh/site-functions  

If it's not the case you could add a line in your ~/.zshrc file.

fpath=(/opt/homebrew/share/zsh/site-functions $fpath)

bash

Based on my understanding of this answer.
A .bash_completion script should perform this kind of source.

for bcfile in ~/.bash_completion.d/* ; do
  [ -f "$bcfile" ] && . $bcfile
done

[hugovk]

So you can check if your fpath variable contains the location of the autocomplete script installation.

echo $fpath | grep /opt/homebrew/share/zsh/site-functions  

Yes, it's the first (and second) entry in my $fpath.