Golang support

[CsatariGergely]

A very basic implementation for golang support. Supports most of the golang purls what I tested with, but not perfect.

[jasinner]

What's the point of this check? Do go package names sometimes have v[0-9]+ in them? Why do we use the name in the download_url in that case?

[jasinner]

Maybe this check should actually be:
if len(namespace) >= 3:

[jasinner]

Oh, perhaps this check is looking for modules with backward incompatiable changes as explained here: https://go.dev/doc/modules/release-workflow

[jasinner]

Maybe the checks could instead be replaced by:

                if len(namespace_parts) == 2:
                    return (
                        f"https://{namespace_parts[0]}/{namespace_parts[1]}/{purl_data.name}"
                        f"/tree/{version}"
                    )
                else:
                    return (
                        f"https://{namespace_parts[0]}/{namespace_parts[1]}/{namespace_parts[2]}"
                        f"/tree/{version}"
                    )

I don't see the need for the regular expression check because the backwards incompatiable changes always occur at the 3rd portion of the namespace anyway right?

[pombredanne]

Thanks for all this. We are in the last leg of calrifying the encoding of namespace/name and version in the spec which is completely relevant for Go and I'll review this as soon as this is completed!