Add command for fetching the latest release info from a github repo

[kaffein]

Hey guys,

Sorry that it took so long for me to come back for this PR but I wanted to get a little bit acquainted with the project (real beginner here ^^). In the end though, it feels good to learn some new stuff ;-) and fortunately, here is the first PR I can come up with.

This one is related to issue #729 : we wanted a command for fetching infos about the latest release on a github repository.
The syntax for the command is quite simple :

!gh releases org-name/repo

Here are some screenshots of how it renders :

1. When simply asking the bot to fetch the latest release info
   

2. When asking for release infos which are, unfortunately, unavailable
   

3. When used with the already existing cron command
   

I hope my code is not too ugly ^^ but anyway, feel free to let me know of any changes that you want me to incorporate into the PR. I'd be glad to have your feedback especially on the Clojure idioms or anything else that can be improved.

thanks a lot for the opportunity o/

[codecov-io]

Codecov Report

Merging #772 into master will decrease coverage by 0.34%.
The diff coverage is 21.62%.

@@            Coverage Diff             @@
##           master     #772      +/-   ##
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- Coverage   44.61%   44.27%   -0.35%     
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  Files          81       81              
  Lines        2434     2471      +37     
  Branches       84       84              
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+ Hits         1086     1094       +8     
- Misses       1264     1293      +29     
  Partials       84       84

[devth]

Thanks for the PR! The code looks great.

If you want, we could expand the capabilities a bit to include:

• list all known releases
• show details for a specific release

So something like:

gh releases <org>/<repo-name> # list releases for a GitHub repo
gh releases show <org>/<repo-name> # show info for the latest release 
gh releases show <org>/<repo-name> <tag> # show info for a specific release

If you want to work on those feel free to continue on this PR, or if not I can merge this as is.

[kaffein]

Thanks for your feedback,

I will work on these extensions from this same PR and will poke you again for reviews when it's ready ;-)

[kaffein]

hey guys,

I have refactored the code according to @devth suggestions

so here are some screenshots of how it renders at the moment :

1. When listing all releases from a Github repo
   

2. When fetching info for the latest release from a Github repo
   

3. When fetching release info from a specific tag
   

4. When fetching release info from a specific tag but the tag does not exist
   

There may be some ways to reduce boilerplate for these commands since displaying release infos are always almost the same. Only the wording and the information to be displayed change, depending on the command.

As usual, feel free to let me know if you guys think there are some other things that need to be improved or that I may have missed.

again thanks ...

[devth]

@kaffein awesome! I'll review tomorrow.

[kaffein]

Hey guys,

based on your reviews, I have done some refactoring to remove similar code.
I have also fixed a bug that I have introduced, related to how the published_at date was being parsed.

can you guys PTAL

thanks in advance

[devth]

💯 thanks @kaffein !!

[kaffein]

thanks @devth :)