nix-shell with per-project (session? derivation?) history

[coreyoconnor]

(incomplete ticket. filing before I forget)

From a discussion about fish shell's --private feature there was the question about supporting something similar for nix-shell.

• https://twitter.com/chris__martin/status/1078728379308953600

In short: establish a concept of session for nix shell and have each session an independent history. Or an option to establish a new history for a given nix-shell.

[Ninlives]

I currently set HISTFILE for each project to use diffrent history. It would be nice if it become a builtin feature

[dtzWill]

On Sun, 30 Dec 2018 01:38:15 -0800, Ninlives ***@***.***> wrote: I currently set HISTFILE for each project to use diffrent history. It would be nice if it become a builtin feature

Might be best handled by an outside tool, but it's a great idea. Not sure I'd always want this behavior personally, and gah re:options. What'd be really exciting is progress on refining this notion of "project". Such an abstraction is needed for other features like persistent shell as gc root. Practically, history per-project is realizable with a one-liner in a shellHook or adding an attribute to your expressions. Direnv might be a good fit for this?

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