Nix 2.13.3 -> 2.15.0

[grahamc]

Description

Closes #286.

Checklist

• Formatted with cargo fmt
• Built with nix build
• Ran flake checks with nix flake check
• Added or updated relevant tests (leave unchecked if not applicable)
• Added or updated relevant documentation (leave unchecked if not applicable)
• Linked to related issues (leave unchecked if not applicable)

Validating with install.determinate.systems

If a maintainer has added the upload to s3 label to this PR, it will become available for installation via install.determinate.systems:

curl --proto '=https' --tlsv1.2 -sSf -L https://install.determinate.systems/nix/pr/$PR_NUMBER | sh -s -- install

[grahamc]

The path that we care about here needs to be updated here, yeah?

nix-installer/src/action/common/configure_shell_profile.rs

Lines 151 to 160 in 8bb37f1

	// If the `$GITHUB_PATH` environment exists, we're almost certainly running on Github
	// Actions, and almost certainly wants the relevant `$PATH` additions added.
	if let Ok(github_path) = std::env::var("GITHUB_PATH") {
	let mut buf = "/nix/var/nix/profiles/default/bin\n".to_string();
	// Actions runners operate as `runner` user by default
	if let Ok(Some(runner)) = User::from_name("runner") {
	buf += &format!(
	"/nix/var/nix/profiles/per-user/{}/profile/bin\n",
	runner.name
	);

[Hoverbear]

Thanks @abathur NixOS/nix@2384d36

[grahamc]

Instead of writing out the /nix/var/nix.... path, we need to update to match this commit: NixOS/nix@2384d36

...which implies we need to capture the XDG_STATE_HOME value from the parent before we sudo and pass it through. If XDG_STATE_HOME isn't set, default to $HOME/.local/state -- again captured before we sudo.

[grahamc]

...which implies we need to capture the XDG_STATE_HOME value from the parent before we sudo and pass it through. If XDG_STATE_HOME isn't set, default to $HOME/.local/state -- again captured before we sudo.

We might be able to skip all this extra complexity and hard-code it, but I'm wondering if that would break users of the action on self-hosted runners.

[Hoverbear]

Doing a full VM/container test pass on this.

[Hoverbear]

Passes! ⭐