Configurable rust install script tipi containers

[pysco68]

Scripts installs a rust toolchain as specified using the following environment variables: RUSTUP_TOOLCHAIN RUSTUP_HOME CARGO_HOME

Additionall the script supports setting the access rights in the installation location in a way that all users in the --group <NAME> have the same rights as the installing user to enable sharing the installation between mutliple group members.

Usage:

Usage: tipi-rust.sh [--group GROUP_NAME]

Additionally, this program requires the following environment variables to be defined:

  RUSTUP_TOOLCHAIN            the rust toolchain to install (version / release)
  RUSTUP_HOME                 path to .rustup
  CARGO_HOME                  path to .cargo

optional arguments:
  -h, --help                 show this help message and exit
  -y                         proceed without asking
  -g, --group GROUP_NAME     name of the user group to chgroup the rustup & cargo install folders to for shared installation

[daminetreg]

This will fail silently in case the downloaded script fails. Also against our ISMS policy.

[daminetreg]

Generally looking nice, I want to see it's use in our real dockers first too, and how is Windows handled ? This likely works for macos ?

Possibly enabling set -e is welcome.

[daminetreg]

By the way we have changes in #92 that likely are a better base for this work than master itself. Because if you test on that state you will end up with 0.0.62

[daminetreg]

If the file doesn't contain proper content, like empty, I think you will still end up with no error as piping to sh will just accept anything. I would download to tmp and run that.

[daminetreg]

I even believe to have seen invalid syntax errors not end up with exit 1 when used with pipe. But it feels so weird that I feel it needs a recheck.