ADD branches cleanup script

[ndelangen]

Issue: -we sometimes leave merged branches around-

What I did

I added a script to remove them

How to test

Run script:

./scripts/clean-merged-branches.sh

Will list the branches

Run script:

./scripts/clean-merged-branches.sh -f

Will remove listed branches from remote

[codecov]

Codecov Report

Merging #1885 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #1885   +/-   ##
=======================================
  Coverage   21.32%   21.32%           
=======================================
  Files         257      257           
  Lines        5740     5740           
  Branches      691      702   +11     
=======================================
  Hits         1224     1224           
+ Misses       4013     3979   -34     
- Partials      503      537   +34

Impacted Files	Coverage Δ
app/vue/src/server/config/babel.js	0% <0%> (-100%)	⬇️
app/vue/src/server/babel_config.js	0% <0%> (-77.42%)	⬇️
app/vue/src/server/utils.js	0% <0%> (-53.58%)	⬇️
addons/knobs/src/components/types/Boolean.js	11.62% <0%> (ø)	⬆️
addons/knobs/src/KnobManager.js	32% <0%> (ø)	⬆️
lib/ui/src/modules/ui/libs/hierarchy.js	48.8% <0%> (ø)	⬆️
app/react-native/src/bin/storybook-build.js	0% <0%> (ø)	⬆️
app/react-native/src/preview/story_kind.js	0% <0%> (ø)	⬆️
lib/ui/src/modules/api/actions/api.js	50.47% <0%> (ø)	⬆️
...ponents/left_panel/stories_tree/tree_decorators.js	33.33% <0%> (ø)	⬆️
... and 16 more

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[usulpro]

tried to test it. always get no merged branches detected

[ndelangen]

Yeah, because i already removed all the merged branches using this 😃

[usulpro]

Great script, Norbert!

I noticed that it missed the branch remotes/origin/Gongreg/master, but we can remove it manually :)
I added two test/* branches (one is merged to another) and it missed them as well, but I can detect them by git branch -a --merged so not sure how to handle such cases

[Hypnosphi]

It doesn't work if the origin is named other than origin (in my case it's upstream). I think I can rename though:

git remote rename upstream origin

[Hypnosphi]

This excludes remotes/origin/Gongreg/master as well

[Hypnosphi]

I will fix that and add a confirm prompt instead of "run this command with -f" message

[Hypnosphi]

I changed "Run with '-f' if you're sure" to "Press 'y' if you're sure"

[usulpro]

LGTM