feat: add enumAsInts flag

[rowe0x]

fix #1177

[johanbrandhorst]

Some of these statements are very similar, maybe we could break them out into a new function instead?

[rowe0x]

@johanbrandhorst resolved :）

[codecov-io]

Codecov Report

Merging #1186 into master will decrease coverage by 0.08%.
The diff coverage is 34.48%.

@@            Coverage Diff             @@
##           master    #1186      +/-   ##
==========================================
- Coverage   54.23%   54.15%   -0.09%     
==========================================
  Files          42       42              
  Lines        4270     4297      +27     
==========================================
+ Hits         2316     2327      +11     
- Misses       1695     1712      +17     
+ Partials      259      258       -1     

Impacted Files	Coverage Δ
protoc-gen-grpc-gateway/descriptor/registry.go	58.89% <0.00%> (-0.95%)	⬇️
protoc-gen-swagger/main.go	26.36% <0.00%> (-0.25%)	⬇️
protoc-gen-swagger/genswagger/template.go	56.15% <41.66%> (-0.12%)	⬇️

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[johanbrandhorst]

That's great, could we also just add a test for this behaviour? There should be some examples in the existing tests for how to test flags.

[johanbrandhorst]

Thanks for your contribution!

[nashikb]

@johanbrandhorst @rowe0x The enums are generated with an array of strings rather than an array of ints, which down-stream breaks swagger generators. Was this really the expected behavior?

[johanbrandhorst]

It's an optional flag, if it breaks your generators just don't set it. Or am I misunderstanding something?

[nashikb]

Absolutely, it's not an issue in the installed-base sense. But for the optional feature itself, I'm not sure how to use it since it's not a format supported by swagger, or at least by the "standard". I'd love to have enums as ints, and I was pleased to see this land 6 days before I wanted it :-) but the downstream support doesn't seem to be there. And if it did, it might prefer an array of int rather than an array of strings ("0", "1", etc).

[johanbrandhorst]

Ok, I see what you're saying. Regardless, clearly some users wanted it and here we are 🤷‍♂️.