offline installer should include `rust-src`

[NewUserHa]

offline installer should include rust-src by default, to avoid to let user manually to download the 2MB file and put into a specific correct folder.

I downloaded rust-1.84.0-x86_64-pc-windows-gnu.msi to avoid to install 7GB msvc c++ compiler and linker, but the language-server rust-analyzer refused to work because of lacking rust-src in the offline installation.
the resolution is to manually download https://static.rust-lang.org/dist/rust-src-1.84.0.tar.gz. found from rust-lang/rust-analyzer#4172 (comment) which is not in installation part in the rust documentation.
and finally need to construct the correct folder path.

Therefore, the offline installers should include the 2MB content by default to prevent the users run into a trap

[ChrisDenton]

You don't have to install msvc when using rustup, that only happens if you select the option to do so. Just select the third option when it asks. Or install the tools rustc needs before installing rustup.

[NewUserHa]

the third option that rustup shows is still msvc version:

This path will then be added to your PATH environment variable by
modifying the HKEY_CURRENT_USER/Environment/PATH registry key.

You can uninstall at any time with rustup self uninstall and
these changes will be reverted.

Current installation options:


   default host triple: x86_64-pc-windows-msvc
     default toolchain: stable (default)
               profile: default
  modify PATH variable: yes

1) Proceed with standard installation (default - just press enter)
2) Customize installation
3) Cancel installation
>

the 2) Customize installation doesn't prompt anything to input, or an option for gnu version to selection.

Or install the tools rustc needs before installing rustup.

there is no method provided in documention to "install the tools rustc needs before installing rustup."

[NewUserHa]

after installation the GNU version is only 300MB larger than MSVC version, it would be better to combine two installers into one installer.
(the sizes of the two installers have only difference of 50MB)

[ChrisDenton]

If you do a custom install, you can type x86_64-pc-windows-gnu:

rustup

Current installation options:


   default host triple: x86_64-pc-windows-msvc
     default toolchain: stable (default)
               profile: default
  modify PATH variable: yes

1) Proceed with standard installation (default - just press enter)
2) Customize installation
3) Cancel installation
>2

I'm going to ask you the value of each of these installation options.
You may simply press the Enter key to leave unchanged.

Default host triple? [x86_64-pc-windows-msvc]
x86_64-pc-windows-gnu

Default toolchain? (stable/beta/nightly/none) [stable]


Profile (which tools and data to install)? (minimal/default/complete) [default]


Modify PATH variable? (Y/n)



Current installation options:


   default host triple: x86_64-pc-windows-gnu
     default toolchain: stable
               profile: default
  modify PATH variable: yes

1) Proceed with selected options (default - just press enter)
2) Customize installation
3) Cancel installation
>

[NewUserHa]

but the GNU version is already installed, and the rustup-init asked about it, after inputted "yes", the rustup-init also doesn't say will overwrite it or will install to a different folder than the offline installer's.

the rustup-init would be better to list the available options to input when at that step of prompt of installation

[workingjubilee]

is this a rustc issue or a rustup issue?