feat(`installer`): rewrite `foundryup` in Rust and allow it to update itself

[mds1]

Component

Foundryup

Describe the feature you would like

This is arguably two separate issues, but seems related enough to do both of these things at the same time:

1. Running foundryup should also update foundryup so users can get foundryup fixes and features without needing to check that for updates separately
2. foundryup should be rewritten in rust so we don't need to maintain a separate bash script

(If separate issues are preferred, let me know and I can just close this and make two new ones)

Additional context

No response

[onbjerg]

This is a pretty breaking change since we need everyone to migrate to the new foundryup. We would need to think about how we make sure people do that. Since this is the case, we should probably also consider moving away from using GitHub releases for everything (and using our hacky workaround for release channels) into something a bit more sane like a manifest format and storing the artifacts on something like S3.

FWIW I don't think this is something anyone can just pick up because of this, since it requires larger coordination of multiple pieces of the release pipeline.

I have some thoughts on the interface for the foundryup CLI, it's capabilities and also design of the manifest format etc.

We should probably still upload artifacts to stable releases on GitHub though

[sambacha]

the benefit of foundryup as a shell script is that you do not need to have rust on a computer to install, this would be negated

The problem with updating foundryup is FOUNDRYUP_VERSION is currently used like this:

 FOUNDRYUP_VERSION=${FOUNDRYUP_VERSION-nightly}
  FOUNDRYUP_TAG=$FOUNDRYUP_VERSION
  # Normalize versions (handle channels, versions without v prefix
  if [[ "$FOUNDRYUP_VERSION" == "nightly" ]]; then

[onbjerg]

There would be no reason to have Rust installed to use foundryup. The benefit of having an actual binary for foundryup is that we can add more complex features with more confidence, and support platforms that do not have bash available by default

[sambacha]

There would be no reason to have Rust installed to use foundryup. The benefit of having an actual binary for foundryup is that we can add more complex features with more confidence, and support platforms that do not have bash available by default

So it becomes i.e. a package manager?

What platforms do not have bash but also have git?

[onbjerg]

foundryup becomes to foundry what rustup is to Rust, which is already sort of the idea