Create sub-modules for examples and wrappers

[rs]

No description provided.

[rs]

@komuw: shouldn't this file be at wrapper/gin level?

[komuw]

@rs agreed.
I have done that now.

[komuw]

@rs I do not know if you want one go.mod for all the examples(like I've done) or one per example directory?

[rs]

When running go test in wrapper/gin, I still get this error:

go: finding golang.org/x/net v0.0.0-20181003013248-f5e5bdd77824
can't load package: package github.com/rs/cors/wrapper/gin: unknown import path "github.com/rs/cors/wrapper/gin": ambiguous import: found github.com/rs/cors/wrapper/gin in multiple modules:
	github.com/rs/cors/wrapper/gin (<redacted>/cors/wrapper/gin)
	github.com/rs/cors v1.5.0 (<redacted>/go/pkg/mod/github.com/rs/cors@v1.5.0/wrapper/gin)

How do you test this?

[komuw]

@rs
after this commit: 6cabe93

the commands:

go test -count=1 ./... && \
cd wrapper/gin && \
go test -count=1 ./... && \
cd ../..

ok  	github.com/rs/cors	0.004s
ok  	github.com/rs/cors/wrapper/gin	0.004s

now works.

However the command;

cd examples && \
go test -count=1 ./... && \
cd ..

doesn't succeed.
The only way I can make the last command succeed is if I remove;

cors/examples/gin/server.go

Line 7 in 9a47f48

cors "github.com/rs/cors/wrapper/gin"

which seems to indicate that maybe the replace directive: https://github.com/rs/cors/pull/67/files#diff-8d6f6299a802b70c5794f4ed12c66ce2R26
is not working.

To be honest, this has turned out quite harder than I thought it would.
I think(more like hoping), that the issue; golang/go#27056 is meant to address this.

I'll keep probing to see if I can get the examples folder to play cool

[komuw]

also: golang/go#27957

[komuw]

this investigation has led me to discover something else;
it seems like Go modules doesn't verify all replace directives.
I have filed; golang/go#28032 for that