Rustup: Feature request: "rustup update nightly" to the last version which has all necessary components.

[vi]

Instead of failing or forcing, just use not-so-up-to-date version.

Additinoal feature request: rustup update nightly --date=2019-01-29 to update nightly to a specific version while keeping it as "nigthly", not as a separate toolchain. Should also allow downgrades.

[kinnison]

I like this idea and will give it further thought. It's a little awkward to walk the dates right now, but the latter half of your request is plausible at least.

[Nemo157]

The latter half is very similar to my suggestion for updatable toolchain aliases, just being able to override the nightly toolchain with an alias pointing at a dated nightly.

[joshlf]

+1 this would be amazing. It would make a huge difference to my daily workflow.

[RalfJung]

(Please stick to one feature request per issue.)

The first request sounds related to https://github.com/rust-lang/rustup.rs/issues/1501.

[jonhoo]

I just submitted https://github.com/rust-lang/rustup.rs/pull/1997, which adds this feature.