Enhancement: add support for macports about cassowary

[rogerwelin]

Hi @desilinguist, sorry for the late reply. Adding cassowary to macports is definitely a good idea. I will update this issue when it's been added

[gwerbin]

I think the Portfile should be as simple as:

# -*- coding: utf-8; mode: tcl; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- vim:fenc=utf-8:ft=tcl:et:sw=4:ts=4:sts=4

PortSystem          1.0
PortGroup           golang 1.0

go.setup            github.com/rogerwelin/cassowary/pkg/client 0.14.1 v
github.tarball_from release
revision            0

description         Modern cross-platform HTTP load-testing tool written in Go

categories          net devel
installs_libs       no
license             MIT
maintainers         {@gwerbin me.gregwerbin.com:outthere}

checksums           ${distname}${extract.suffix} \
                        rmd160  e374e9cb9937265c4f4628eab5c535019ee420ca \
                        sha256  da4c4ae3f3fb7d606398b7f3208d2dab79e97cf40b48faa3ee14611da33cb73f \
                        size    41845

destroot {
    xinstall -m 0755 ${worksrcpath}/${name} ${destroot}${prefix}/bin/
}

go.vendors # IDK what to put here

I'm just not sure about constructing the correct go.vendors invocation. It's documented here, but I don't know enough about Go and/or MacPorts to finish the job.

[rogerwelin]

@gwerbin 🙏