Golang module path

Module paths are used both to locate, and uniquely identify packages.
Downloading packages is normally performed by a lookup in go index,
but the actual src is hosted using a server/service of your choosing.

Notes

URL suffix

Suffix indicating repository type

# Repos supporting multiple protocols will try each in order.
# ex: https://, git://, git+ssh://
#
#
# Bazaar      .bzr
# Fossil      .fossil
# Git         .git
# Mercurial   .hg
# Subversion  .svn

import "example.com/path/to/repo.git"
import "example.com/path/to/repo.git/sub/directory"

HTTP meta tag

HTTP meta tag

<!--
  Meta tags let you abstract the path of your src.
  You may use a import-prefix that has nothing to do with your URL.

  IMPORT-PREFIX: prefix of unique-identifier of package (not necessarily url) ex. "foo.com/x"
  VCS:           bzr, fossil, git, hg, svn
  REPO-ROOT:     URL to repo-root (no VCS extension!)
-->
<!--                            IMPORT-PREFIX  VCS   REPO-ROOT                 -->
<meta name="go-import" content="example.org    git   https://code.org/r/p/exproj">

Hosted services

Hosted Services

# github.com
import "github.com/user/your_project"
import "github.com/user/your_project/sub/directory"

# launchpad.net
import "launchpad.net/project"
import "launchpad.net/project/series"
import "launchpad.net/project/series/sub/directory"

# ...

Private modules

TODO:

verify you can host your own proxy/checksums

You may use private modules, but you'll need to set environment variables to keep them private.

# ignore checksum checks on these packages
GOPRIVATE=*.corp.example.com,rsc.io/private

# alternatively, define your own proxy with your own checksums
GOPROXY=proxy.example.com
GONOPROXY=none

Examples

Git+SSH Private Module, Substituting URL

WARNING:

nope, did not work, let's use HTTP meta tags

Your ~/.gitconfig or ~/.ssh/config can be used to substitute URLs.
Using this, you can defer requests to your server.

~/.gitconfig

# ~/.gitconfig

[url "ssh://git@example.com:1234/repos"]
    insteadOf = https://go.foo.com/x

~/.config/go/env

# ~/.config/go/env

GOPRIVATE="go.example.com/x/*"
GONOSUMDB="go.example.com/x/*"
GONOPROXY="go.example.com/x/*"

go env -w 'GOPRIVATE=go.example.com/x/*"'

mkdir myproject
go mod init go.example.com/x/myproject