uv pip tree machine readable output

[ibraheemdev]

e.g. JSON with -j. This is useful for interacting with graph tools such as mermaid.

[zanieb]

I think we should probably use --format json for consistency with other interfaces?

[zanieb]

See also #411

[ChannyClaus]

should this be part of uv pip tree or uv pip list? uv pip list --format json seems to already print something very similar to what pipdeptree --json prints:

$ uv pip list --format json | jq 
[
  {
    "name": "certifi",
    "version": "2024.6.2"
  },
  {
    "name": "charset-normalizer",
    "version": "3.3.2"
  },
  {
    "name": "idna",
    "version": "3.7"
  },
  {
    "name": "requests",
    "version": "2.32.3"
  },
  {
    "name": "urllib3",
    "version": "2.2.2"
  }
]

additionally the output of pipdeptree --json doesn't seem to necessarily relate to the concept of tree, since when there's a nested dependency, it doesn't actually nest it in the json output.

thoughts @dsully @kdeldycke?

[kdeldycke]

Oh I'm not really picky about the shape of the JSON output, as long as it is machine readable.

That's because I'm only interested in creating a Mermaid diagram to visualize dependencies like so: https://kdeldycke.github.io/meta-package-manager/install.html#python-dependencies

So whatever the JSON looks like, I'll have to write a script to generate the .mmd file out of uv pip tree output.