`rustup` wanted features & bugfixes

[ojeda]

Features that we would like to see

Required (we almost certainly want them)

Nice to have (not critical, we could workaround if needed, etc.)

Low priority (we will likely not use them in the end)

Done (stabilized, fixed, not needed anymore, etc.)

• Support .rust-toolchain.toml.
  • From: add rust-toolchain.toml #953.
  • Issue: Support .rust-toolchain.toml rust-lang/rustup#3182.
  • PR: add support for .rust-toolchain.toml rust-lang/rustup#3195.

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Bugs that we would like to see fixed

Required (we almost certainly want them)

Nice to have (probably not critical, we could workaround if needed, etc.)

Low priority (we will likely not use them in the end)

Done (stabilized, fixed, or not needed anymore, etc.)

• Clarify in which component and/or profile rustdoc is.

  • Issue: Clarify in which component and/or profile rustdoc is rust-lang/rustup#2801.
  • PR: Mention the rustdoc in components.md rust-lang/rustup#2805.

• Downloading specific betas should be easier.

  • Issue: Downloading specific betas should be easier rust-lang/rustup#1329.