Accomodate per-channel greetings

[patcon]

I am part of an organization where we want to greet users when they first enter our open #organizing channel, and explain the steps to taking part meaningfully in our group

greetingslack is so close to accommodating this, so I was hoping you might be open to an idea :)

Two things would be required:

1. allow the team_join message to be disabled via envvar
2. allow multiple envvars for various channel joins

For (2), I could easily imagine this taking the form of channel name being derived from envvars of a certain pattern, like GREETINGSLACK_MESSAGE_*

So:

• GREETINGSLACK_MESSAGE_RANDOM would be the message for #random
• GREETINGSLACK_MESSAGE_ORGANIZING_OPEN would be the message for #organizing-open

Curious your thoughts! Thanks so much for you consideration :)

Relies on: #12

[orliesaurus]

Cool idea - Have you considered using the Slack command "/topic" ?

[patcon]

240 char max among some other downsides (only one line prominent unless hovering, etc.)

[orliesaurus]

Ok @patcon I merged your PRs, feel free to close down the issues ! Thanks for your commitment 👍

[patcon]

I can haz re-open?

[molood]

Has anyone made this work yet? I'd like to have a greeting in channel too.

[patcon]

Unfortunately, no, I didn't make time to work on it 😞

It's not a priority for my group right now, but I'd be happy to support you (and any future travellers through this thread) in making the code contribution if you're interested! (Not to assume you need my help with anything, but just saying that I'm happy to support if it's appreciated :)

(I haven no special status in this repo, but @orliesaurus seems supportive of merging contributions, so I'm sure we could all get it merged in 🎉 )