proposal: Provide same utility as rustup.sh for Rust

[roman-vanesyan]

Not really proposal, but a idea drop out to be discuss with community. Currently, Go lacks a single canonized way to install it on a computer. The official page suggest to download archive and install go by extracting in to /usr/local or another location, also there're unofficial repositories for different package managers (dnf, apt, etc.). The official way is not so smooth, because of each new release of Go, we should install it by hand again and again. I'd like to see something like rustup for Go (goup?) (but official one). It is a single bash file tool that helps to orchestrate Rust e.g.: install multiple versions, update 'em, etc. more: https://www.rustup.rs/

[bradfitz]

This sounds like a partial dup of already-done #18136 (which added support for go get golang.org/x/build/version/go1.N).

See also pending #23223 to shorten & promote that to golang.org/v/go1.N.

[roman-vanesyan]

One bad thing of go get is that I must have Go already installed on my computer.

[bradfitz]

@vanesyan, for first-time users, @spf13 and @jessfraz were working on "getgo":

See https://groups.google.com/forum/#!topic/golang-nuts/ZFqZkGYX4x8 and open bug #21277

[rsc]

We all agree that we want a 1-line installer and have started working on it. I couldn't find the original bug (if any) so I created #23381. Closing this as a dup of that.