Aggregate coverage value across packages

[jnadler]

I just tried this out - nice work btw!
Unfortunately it doesn't seem to work with multiple packages, which is a shame because a single coverage % value across the whole project is really the key thing I'm after. The value in the badge is the coverage from the first package only.
To test across all packages I ran go test ./... -coverprofile=coverage.out && go tool cover -html=coverage.out -o=coverage.html

[jpoles1]

Hey @jnadler, thanks for bringing this up. I'm actually working on a project with such a structure now, and I ran into the same issue. I've got to implement a solution, I think I'll use:
go tool cover -func=coverage.out

[jpoles1]

I think the following bash command should work for most projects:
go test ./... -coverprofile=coverage.out && go tool cover -func=coverage.out

@jnadler, when run on your project, does this seem to work, and generate a line akin to:
total: (statements) 74.6%

[jpoles1]

Alrighty, @jnadler I think the above fix should work. Please give it a try and let me know!

[jnadler]

Well that's closer, but in this project there are still some packages with no tests whatsoever, and so we get a vastly inflated coverage number (coverage is good in the packages with tests).

That's no fault of your software however. I've just found this bug which seems to cover it:
golang/go#24570

I'll close this as there seems to be nothing you can do until they fix that one. Thanks for the speedy response, and for sharing this tool!!

[jnadler]

I should mention - I think that change is good, and I appreciate that it doesn't depend on specific makefile setup. IMO it would be good to merge that change to master, though it might require a small change to the readme.