Some example output when fetching from missing repository:

This is GitHub misbehaving. They don't want to aid discovery of private repos, so they return auth challenges instead of a 404. Not sure of the best move here.

I think we want to permit people to use "go get" with private repositories, where they authenticate themselves at "go get" time, so I don't see how we can do anything to make this better.

Maybe there's something we can tell git when we invoke it so that it doesn't prompt for interactive auth. But that may defy user expectations also. :-/

The options seem to be:

1. Don't fix this.

2. Take away git's connection to the terminal and tell people who want to use private GitHub accounts to put their GitHub credentials somewhere Git can get them non-interactively.

I'm okay with 2. What do other people think?

I'm ok with 2, as long it doesn't make the go get ... progress stuck XD

2 seems fine. I know we support older versions of git, but git 2.3.0 introduced the GIT_TERMINAL_PROMPT environment variable to disable prompting for passwords. That'd make this a one-line fix.

@josharian git on Windows is stil on version 1.9.5 so please support lower git versions in the fix :)

Thanks Josh. I will use that suggestion.

@Thomasdezeeuw, I'm sorry, but I have no idea how to fix
the go command's invocation of git for earlier versions.
Git is opening "CONIN$" and "CONOUT$" itself.
It is probably easiest just to suggest that people who
do run into this problem should update to a newer Git.

CL https://golang.org/cl/12175 mentions this issue.

Wild guess: setting http://godoc.org/syscall#SysProcAttr.Noctty to true, doesn't help?

Maybe add info to the docs and a link to this issue, since Git for Windows is still at 1.9.5 (https://git-scm.com/download/win, it autostarts a download)?

This might be helpful. Code that's started using GIT_TERMINAL_PROMPT had other workarounds before, e.g. vim-plug took https://github.com/junegunn/seoul256.vim.git and inserted git::@ to give https://git::@github.com/junegunn/seoul256.vim.git. See https://github.com/junegunn/vim-plug/wiki/faq#whats-the-deal-with-git-in-the-url