Add automation script to generate completions on release

[frostming]

Pull Request Check List

• A news fragment is added in news/ describing what is new.
• Test cases added for changed code.

Describe what you have changed in this PR.

[frostming]

Hi, @Aloxaf , I updated the zsh script according to PEP 621 and latest CLI. But I have trouble extracting the pdm packages. It seems it is not easy to do it with pure pattern matching, unless we actually parse the TOML document. Concretely, the following formats are legal:

# All in one line
dependencies = ["requests", "click==7.0"]
# Each at its own line
dependencies = [
    "requests",
    "click==7.0"
]
# Or hybrid
dependencies = [
    "requests", "requests-toolbelt",
    "click", "click-completion"
]

For package names, we can take the running A-Z a-z,0-9, -, _, . sequence.

How do I handle it?

[Aloxaf]

Oh, I haven't noticed that the format has changed.

I think the best way is to call python:

packages=($(command python -c 'import toml; d=toml.load("pyproject.toml"); print(*d["project"]["dependencies"])'))

Or with pure zsh?:

setopt local_options re_match_pcre
[[ $(<pyproject.toml) =~ 'dependencies *= *\[((.|\n)*?)\]' ]]
packages=(${=${(Q)match//,/}})

[codecov-io]

Codecov Report

Merging #367 (b15bbc0) into master (a10f9fe) will increase coverage by 0.02%.
The diff coverage is 92.00%.

@@            Coverage Diff             @@
##           master     #367      +/-   ##
==========================================
+ Coverage   82.28%   82.30%   +0.02%     
==========================================
  Files          63       63              
  Lines        5165     5183      +18     
  Branches      929      933       +4     
==========================================
+ Hits         4250     4266      +16     
- Misses        644      645       +1     
- Partials      271      272       +1     

Flag	Coverage Δ
unittests	82.23% <92.00%> (+0.02%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
pdm/cli/options.py	98.21% <ø> (ø)
pdm/cli/commands/completion.py	89.47% <80.00%> (-10.53%)	⬇️
pdm/cli/commands/info.py	93.54% <92.00%> (-6.46%)	⬇️
pdm/cli/actions.py	74.48% <100.00%> (-1.32%)	⬇️
pdm/cli/commands/search.py	64.58% <100.00%> (+1.53%)	⬆️
pdm/cli/utils.py	80.55% <100.00%> (+0.63%)	⬆️
pdm/formats/requirements.py	86.02% <100.00%> (+1.64%)	⬆️

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[frostming]

Oh, I haven't noticed that the format has changed.

I think the best way is to call python:

packages=($(command python -c 'import toml; d=toml.load("pyproject.toml"); print(*d["project"]["dependencies"])'))

Or with pure zsh?:

setopt local_options re_match_pcre
[[ $(<pyproject.toml) =~ 'dependencies *= *\[((.|\n)*?)\]' ]]
packages=(${=${(Q)match//,/}})

Great, that helps. then how to catch all the matches:

dependencies = [ ]

[project.optional-dependenceis]
extra1 = [ ]
extra2 = [ ]
extra3 = [ ]

Each array contains several dependencies. I wonder if it can be done by pure zsh. calling python isn't an option as it needs some quirks to find the correct python. But it is ok to depend on 3rd party shell utilities and downgrade to no-completion when they are not installed on the system.

Changed my mind: maybe we can inject some python code into the script and PDM knows the Python interpreter path.

[frostming]

It seems working like a charm! may need another look from @Aloxaf

[Aloxaf]

As a global variable, PYTHON is a too common name. Users may use this name for their own plugin.
I suggest something like PDM_PYTHON so that it won't be accidentally overridden/accessed by other scripts.

[Aloxaf]

The rest LGTM.