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nix-shell: look up shell.nix when argument is a directory (#11057)

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* Refactor: rename runEnv -> isNixShell

* Refactor: rename left -> remainingArgs

* nix-build.cc: Refactor: extract baseDir variable

* nix-build.cc: Refactor: extract sourcePath, resolvedPath variables

* nix-shell: Look for shell.nix when directory is specified

* Add legacy setting: nix-shell-always-looks-for-shell-nix

* rl-next: Add note about shell.nix lookups

* tests/functional/shell.nix: Implement runHook for dummy stdenv
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Robert Hensing 2024-07-08 14:36:36 +02:00 • committed by GitHub
parent d8850618b6
commit cfe3ee3de8
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10 changed files with 198 additions and 29 deletions
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19
src/libcmd/compatibility-settings.hh Normal file
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@ -0,0 +1,19 @@
#pragma once
#include "config.hh"
namespace nix {
struct CompatibilitySettings : public Config
{
CompatibilitySettings() = default;
Setting<bool> nixShellAlwaysLooksForShellNix{this, true, "nix-shell-always-looks-for-shell-nix", R"(
Before Nix 2.24, [`nix-shell`](@docroot@/command-ref/nix-shell.md) would only look at `shell.nix` if it was in the working directory - when no file was specified.
Since Nix 2.24, `nix-shell` always looks for a `shell.nix`, whether that's in the working directory, or in a directory that was passed as an argument.
You may set this to `false` to revert to the Nix 2.3 behavior.
)"};
};
};