option to check if Slack.app is running

[gautiermichelin]

Hi Tom,

Very nice app. I just moved my little team ( a huge world of... 3) to slack and your app is exactly what I was looking for.
I'd like to add an option to check if Slack.app is running before uploading pic to be able to fully forget sqwack background running. I'd do that through a simple :

ps aux | grep "[S]lack.app" | wc -l

This should be a toggling option on command line.

How do I start to be sure you'll integrate my pull request ? I'm quite used to php, and as everything I'm doing in github, if I want it to be integrated, better ask before...

[tompedals]

That's a nice idea!

I would suggest adding an option to the command so it's not always checked.

The best place would probably be CronCommand.

So for example if pass the option --slack-app-open it will only upload a photo if the app is running.