[testing] Replace script-based tool installation with nix #3691
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Previously, binary tools like promtail and prometheus (enabling log and metrics collection) and kube and kind (enabling local kube clusters) were installed using bash scripts. A script-based approach, while simple, requires tedious and error-prone copying and committing to other repos (e.g. subnet-evm and hypersdk) that need the same functionality. Possible to rewrite the scripts to golang which allows usage via `go run` or `go install`. Simple enough if the versions never change, but still requires retrieving binaries, verifying their hashes for security, and potentially dealing with tar archives. Still more complicated if it becomes necessary to ensure the desired version is the one in the path. Switching to [nix](https://nixos.org/), on the other hand, is an established way of solving the problem that doesn't involve maintaining code. Installing nix is a one-time operation not too different from homebrew, except that the result has more guarantees of reproducibility across linux and macos.
StephenButtolph
approved these changes
Feb 3, 2025
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Why this should be merged
Previously, binary tools like promtail and prometheus (enabling log and metrics collection) and kube and kind (enabling local kube clusters) were installed using bash scripts. A script-based approach, while simple, requires tedious and error-prone copying and committing to other repos (e.g. subnet-evm and hypersdk) that needed the same functionality.
Possible to rewrite the scripts to golang which allows usage via
go runorgo install. Simple enough if the versions never change, but still requires retrieving binaries, verifying their hashes for security, potentially dealing with tar archives. Still more complication if it becomes necessary to ensure the desired version is the one in the path.Switching to nix, on the other hand, is an established way of solving the problem that doesn't involve maintaining code. Installing nix is a one-time operation not too different from homebrew, except that the result has more guarantees of reproducibility across linux and macos.
How this works
How this was tested
CI, manually for direnv usage
Need to be documented in RELEASES.md?
N/A