feat: Add temp-dir setting

guiwf/lix

This adds a new temp-dir setting for controlling the temporary directory
without having to change the TMPDIR env var. This can be used to e.g.
use a path on a case-sensitive store on macOS for temporary files
without changing the TMPDIR var used by interactive shells or commands
invoked with `nix run`.

This also stops unsetting `TMPDIR` on darwin when the env var value
starts with `/var/folders/`, preferring instead to just do the check
when reading `TMPDIR`. This way the inherited `TMPDIR` env var is
preserved for child processes (such as interactive shells).

As a side effect this changes the behavior of `nix-build -o ''` to act
like `nix-build --no-out-link` instead of failing with an error caused
by trying to create a symlink at the cwd.

Fixes: https://git.lix.systems/lix-project/lix/issues/253
Fixes: https://git.lix.systems/lix-project/lix/issues/112
Change-Id: I9ee826323f2deca62854715a77ca7a373a948a29

This commit is contained in:

Lily Ballard

2024-11-06 18:11:47 -08:00

parent 72cce7be3f

commit 3c8096e5cb

24 changed files with 182 additions and 47 deletions

									
										src/nix/develop.cc
									
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				@@ -7,6 +7,7 @@

				#include "outputs-spec.hh"

				#include "derivations.hh"

				#include "run.hh"

				#include "temporary-dir.hh"

				#include <iterator>

				#include <memory>