Add command-name settings for --help

[web-sst]

Adding these name settings enables --help for them. Without them I get the help for prompt.

[simonw]

Currently I get this:

llm chat --help

Usage: llm chat [OPTIONS]

  Hold an ongoing chat with a model.

Options:
  -s, --system TEXT            System prompt to use
  -m, --model TEXT             Model to use
  -c, --continue               Continue the most recent conversation.
  --cid, --conversation TEXT   Continue the conversation with the given ID.
  -t, --template TEXT          Template to use
  -p, --param <TEXT TEXT>...   Parameters for template
  -o, --option <TEXT TEXT>...  key/value options for the model
  --no-stream                  Do not stream output
  --key TEXT                   API key to use
  --help                       Show this message and exit.

I might be misunderstanding what this PR does - what's the problem it fixes?

[web-sst]

Apologies, I should have been clearer. I got here through embed-multi:

(venv) d01$ llm embed-multi --help
Usage: llm prompt [OPTIONS] [PROMPT]

  Execute a prompt

  Documentation: https://llm.datasette.io/en/stable/usage.html

  Examples:

      llm 'Capital of France?'
      llm 'Capital of France?' -m gpt-4o
      llm 'Capital of France?' -s 'answer in Spanish'

  Multi-modal models can be called with attachments like this:

      llm 'Extract text from this image' -a image.jpg
      llm 'Describe' -a https://static.simonwillison.net/static/2024/pelicans.jpg
      cat image | llm 'describe image' -a -
      # With an explicit mimetype:
      cat image | llm 'describe image' --at - image/jpeg

Options:
  -s, --system TEXT               System prompt to use
  -m, --model TEXT                Model to use
  -a, --attachment ATTACHMENT     Attachment path or URL or -
  --at, --attachment-type <TEXT TEXT>...
                                  Attachment with explicit mimetype
  -o, --option <TEXT TEXT>...     key/value options for the model
  -t, --template TEXT             Template to use
  -p, --param <TEXT TEXT>...      Parameters for template
  --no-stream                     Do not stream output
  -n, --no-log                    Don't log to database
  --log                           Log prompt and response to the database
  -c, --continue                  Continue the most recent conversation.
  --cid, --conversation TEXT      Continue the conversation with the given ID.
  --key TEXT                      API key to use
  --save TEXT                     Save prompt with this template name
  --help                          Show this message and exit.

Also, llm embed_multi --help does produce the expected help output.

[simonw]

This is weird, I'm not able to replicate your result. Here's what I get on macOS:

llm embed-multi --help

Usage: llm embed-multi [OPTIONS] COLLECTION [INPUT_PATH]

  Store embeddings for multiple strings at once

  Input can be CSV, TSV or a JSON list of objects.

  The first column is treated as an ID - all other columns are assumed to be
...

What operating system are you using?

For me, llm embed_multi --help (with the underscore) shows the same output as llm prompt --help.

[web-sst]

I'm on FreeBSD 14.1.