bootstrap: Rename `profile = user` to `profile = dist`

[jyn514]

config.user.toml currently says:

rust/src/bootstrap/defaults/config.user.toml

Line 1 in 20ca24e

# These defaults are meant for users and distro maintainers building from source, without intending to make multiple changes.

"users" is so ambiguous as to be meaningless. What I originally intended was something like "people building from source once and installing it locally", like Gentoo users or something. I think "dist" is a much better name for this profile: it makes it more clear why CI uses the profile and it hopefully will make it easier for distros to find and understand.

cc @cuviper - you said in https://rust-lang.zulipchat.com/#narrow/stream/233931-t-compiler.2Fmajor-changes/topic/Redesign.20bootstrap.20stages.20compiler-team.23619/near/351408631 this would be helpful, do you still think that? The only other name I can think of is something like install but I'm not sure that's a good description of what CI is doing with the profile.

[jyn514]

Mentoring instructions: I want to do this in a backwards compatible way, so that old config files keep working seamlessly. To do this you'll need to add a way to add aliases to profiles. Take a look around

rust/src/bootstrap/config.rs

Lines 994 to 1002 in 5e2969e

	if let Some(include) = &toml.profile {
	let mut include_path = config.src.clone();
	include_path.push("src");
	include_path.push("bootstrap");
	include_path.push("defaults");
	include_path.push(format!("config.{}.toml", include));
	let included_toml = get_toml(&include_path);
	toml.merge(included_toml);
	}

and change it to treat user the same as dist. Then rename the relevant places around

rust/src/bootstrap/setup.rs

Line 23 in a90e7d4

User,

Please add a test in src/bootstrap/config/tests.rs once you're done.

@jyn514 can i work on this

[jyn514]

@AnakinSkywalkeer you should talk to @Swarnlataaa - they have #112078 open but it's broken, I'm not sure of the status.

@AnakinSkywalkeer you should talk to @Swarnlataaa - they have #112078 open but it's broken, I'm not sure of the status.

oh okay

@rustbot claim