I'm sorry that I forgot showing a link to Crystal programming langugage.

http://crystal-lang.org/

Approve this PR! =)

Is there any documentation which explains why these particular rules are a good idea? Is this language used by enough people to make it worth adding to this collection of most useful templates?

@arcresu This is base template https://github.com/manastech/crystal/blob/119ccc89065165bc937b3417e5ac2af2bab6e056/src/compiler/crystal/tools/init/template/gitignore.ecr, but *.bc, *.o needed too.

"used by enough people"? Ok, what is measure? Stars/Fork/Watch on Github?

Is there any official documentation? There's no specific measure of popularity - I see that this language is in alpha though and only has a handful of repositories here. From that search page, the most popular few don't seem to include the other rules in their .gitignores, just the .crystal rule.

@arcresu http://crystal-lang.org/docs/index.html
Agree with you, all files *.bc, *.o is located in .crystal dir. Yes, language is in alpha, if for adding template to this repo, Crystal must make stable version release - ok, remove this PR and return later =)

I'll close this in favour of #1589 since that PR is a little more comprehensive. Comment there if you have any changes to suggest. Thanks!