Show that a toolchain download is due to rust-toolchain.toml #4445
Description
Problem you are trying to solve
I'm in directory atuin/, trying to run the tool bacon, and wanted to check if bacon has a newer version because it's cargo install-ed:
atuin [!]
❯ cargo info bacon
info: syncing channel updates for '1.88-x86_64-unknown-linux-gnu'
info: latest update on 2025-06-26, rust version 1.88.0 (6b00bc388 2025-06-23)
info: downloading component 'cargo'
info: downloading component 'clippy'
info: downloading component 'rust-docs'
info: downloading component 'rust-std'
info: downloading component 'rustc'
info: downloading component 'rustfmt'
info: installing component 'cargo'
info: installing component 'clippy'
info: installing component 'rust-docs'
info: installing component 'rust-std'
info: installing component 'rustc'
info: installing component 'rustfmt'
error: the 'cargo' binary, normally provided by the 'cargo' component, is not applicable to the '1.88-x86_64-unknown-linux-gnu' toolchain
Why is cargo suddenly updating the toolchain?
Solution you'd like
Show an obvious notice that it's downloading a toolchain due to rust-toolchain.toml.
Notes
No response