Go packages installations

[pelacables]

I needèd to install a go package and did not find any easyblock that support duch installation so I asked the mailing list for help and Alan O'Cais did provide a sample easyconfig (using the Binary easyblock) that installed the go package:

I leave it here for the record, in case someone else needs to install go package with EB and while the go easyblock is not available.

https://gist.github.com/ocaisa/1057ca936273db6715768fcb9b4b9191

easyblock = 'Binary'

name = 'Go-Example'
version = '20180724'
commit_id = '46695d8'

homepage = 'https://github.com/golang/example'
description = """This repository contains a collection of Go programs and libraries that demonstrate the language, standard libraries, and tools."""

toolchain = {'name': 'GCCcore', 'version': '7.3.0'}

source_urls = ['https://github.com/golang/example/archive/']
sources = ['%s.tar.gz' % commit_id]

buildininstalldir = True
extract_sources = True

builddependencies = [
    ('binutils', '2.30'),
]

dependencies = [
    ('Go', '1.10.3', '', True),
]

# The sources are expected in a very particular place
unpack_options = '&& mkdir -p %(installdir)s/src/github.com/golang&& mv example-* %(installdir)s/src/github.com/golang/example'


# Update GOPATH so install location is correct
install_cmd = "export GOPATH=%(installdir)s:$GOPATH &&"
# Update PATH to include new bin directory (in case it is needed)
install_cmd += "export PATH=%(installdir)s/bin:$PATH &&"

# Do the stringutils installation
install_cmd += "cd %(installdir)s/src/github.com/golang/example/stringutil &&"
install_cmd += "go build && go install &&"

# Do the hello installation
install_cmd += "cd %(installdir)s/src/github.com/golang/example/hello &&"
install_cmd += "go build && go install"

modextrapaths = {
    'GOPATH': ['.'],
}

sanity_check_paths = {
    'files': ['bin/hello'],
    'dirs': ['bin', 'src', 'pkg'],
}
``