go: update to 1.5.1

[lutz.horn@…]

The ​Go programming language has been upgraded to ​version 1.5. Mac Ports still contains version 1.4.2.

Please update the go port​ to the current version.

[axet (Alexey Kuznetsov)]

can you please add +variant for windows, linux32/64, mac builds?

/opt/local/go/src/make.bash

GOOS=windows GOARCH=386 ./make.bash --no-clean
GOOS=windows GOARCH=amd64 ./make.bash --no-clean
GOOS=darwin GOARCH=386 ./make.bash --no-clean
GOOS=linux GOARCH=amd64 ./make.bash --no-clean

[coditect (Nicholas Rawlings)]

As of version 1.5, the Go toolchain is written in Go. This means that in order to build Go 1.5, one must either already have Go 1.4.x installed or use the ​gccgo compiler.

Should the Portfile build Go 1.4 as a prerequisite to building Go 1.5? Or would it be preferable to add Go support to gcc5​ (possibly as a variant) and specify it as a build dependency?

[lutz.horn@…]

Replying to nicholas@…:

Should the Portfile build Go 1.4 as a prerequisite to building Go 1.5? Or would it be preferable to add Go support to gcc5​ (possibly as a variant) and specify it as a build dependency?

As a Go developer, I'd prefer not to have Go 1.4 installed in addition. But if this is the easier and faster approach to have Go 1.5 available in MacPorts, this option would be OK for me.

[coditect (Nicholas Rawlings)]

It appears that using gccgo is not an option since it currently does not build on Darwin: ​https://github.com/golang/go/issues/10727

[coditect (Nicholas Rawlings)]

Converts the go port to a stub with subports go1.4 and go1.5

[coditect (Nicholas Rawlings)]

port select file for go1.4 subport

[coditect (Nicholas Rawlings)]

port select file for go1.5 subport

[coditect (Nicholas Rawlings)]

The patch I submitted converts the go port to a stub (like the port for PHP​, but much simpler) and adds sub-ports for Go 1.4 and Go 1.5, with go1.4 defined as a build dependency for go1.5. It also adds a go get command to the build phase to include standard tools like godoc, vet, and cover that no serious Go developer can live without.

See also ticket 49047, which defines a new go_select port for easy switching between Go versions.

[ci42]

Replying to nicholas@…:

It also adds a go get command to the build phase to include standard tools like godoc, vet, and cover that no serious Go developer can live without.

These tool are included in the go-tools port.