Add GoPackage EasyBlock

[Darkless012]

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[Darkless012]

Yet another take on reproducible go package easyblock.
Related: #1629 #1466

This time GoPackage easyblock is using go modules which are currently "the way to go" with managing dependencies in go.

Setting only GOBIN to installdir/bin will ensure the binaries are put into correct place.
Apparently GOPATH is not a thing anymore...

How it works?

Option a) There is go.mod and go.sum in the downloaded package.
go install will download all the dependencies while go.sum ensures that those dependencies are always the same.

Option b) There is no go.mod and go.sum.
Go allows to pretty easy migration to native modules from various old "packaging" tools (https://blog.golang.org/migrating-to-go-modules)
In this case the bundle tries to do exactly that.

However "modulename" is required in this case. So that go knows how to call it.

Sometimes it also fails to pinpoint exact version of dependency, so "force_deps" is used to say go which version of that dependency is used.

Then it does all the magic.
As part of output there is generated go.mod and go.sum files in the log.

Ideally you should make patchfile with those 2 new files, and include that into build. And this should truly ensure reproducibility of the build.

[boegel]

This is very generic... We can't derive anything from software name?

[Darkless012]

I'm not very confident in naming in go. But it should match last part of Go module name, considering that main.go is in root. Otherwise it could be any name from any sub-folder producing binary.

The main reason for this "basic" check was that for example compiling gonum doesn't produce any binary, since it is intended to be used as dependency in go source. So you are able to build and install this package, but no binary will be dropped in bin and nothing you can use on easybuild will be installed.

Should we check the name (namelower)?
Consider this: https://github.com/evolbioinfo/gotree
They have 3 different names in single paragraph:
Gotree in heading
GoTree just below in description
gotree as cli command

[boegel]

I think assuming that there will be a bin/%(namelower)s makes sense, since this is only a default (it's easy to override in the easyconfig file).

This would work for both goalign and gotree.

Maybe also add %(namelower)s --help as default sanity check commands (via custom_commands here)?

Also easy to override in easyconfig file via sanity_check_commands.

[boegel]

I think assuming that there will be a bin/%(namelower)s makes sense, since this is only a default (it's easy to override in the easyconfig file).

This would work for both goalign and gotree.

Maybe also add %(namelower)s --help as default sanity check commands (via custom_commands here)?

Also easy to override in easyconfig file via sanity_check_commands.

[boegel]

lgtm, tested with easybuilders/easybuild-easyconfigs#10469