feat: add just

[veprbl]

It appears, there is some demand for a tool to run common tools. My proposal is to follow what LDMX experiment did and adopt just. We can add justfiles to the relevant repositories.

[Copilot]

Pull request overview

This pull request adds the "just" command runner tool to the Spack package preferences. "Just" is a command runner similar to make that can be used to define and execute common development tasks, following the pattern established by the LDMX experiment.

Changes:

• Added package preferences for "just" version 1.46.0 in spack-environment/packages.yaml

[veprbl]

I think, this has rust in build closure. @wdconinc, please remind me, are we averse to that?

[Copilot]

Pull request overview

Copilot reviewed 7 out of 7 changed files in this pull request and generated 1 comment.

[Copilot]

/etc/eic-env.sh is POSIX sh and sources every /etc/profile.d/*.sh. This script unconditionally evals Bash completion output, which can produce syntax errors or complete: not found when sourced under sh (and also adds overhead for non-interactive shells). Guard this so it only runs when in bash (and ideally only interactive) and when just is available on PATH (e.g., check BASH_VERSION/$- and command -v just).

Suggested change

	eval "$(just --completions bash)"
	if [ -n "${BASH_VERSION:-}" ]; then
	case $- in
	*i*)
	if command -v just >/dev/null 2>&1; then
	eval "$(just --completions bash)"
	fi
	;;
	esac
	fi

[wdconinc]

I think, this has rust in build closure. @wdconinc, please remind me, are we averse to that?

We already have cryptography in rust. I don't have anything against rust.