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shell.nix: Enable e.g. --arg nixpkgs ./. (#330823)

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Silvan Mosberger 2024-08-29 22:42:20 +02:00 committed by GitHub
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1 changed files with 14 additions and 6 deletions
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shell.nix
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@ -4,17 +4,25 @@
# because every time you change any file and do another `nix develop`, # because every time you change any file and do another `nix develop`,
# it would create another copy of the entire ~500MB tree in the store. # it would create another copy of the entire ~500MB tree in the store.
# See https://github.com/NixOS/nix/pull/6530 for the future # See https://github.com/NixOS/nix/pull/6530 for the future
{ #
system ? builtins.currentSystem, # Note: We use a pinned Nixpkgs so that the tools are readily available even
}: # when making changes that would otherwise require a new build of those tools.
# If you'd like to test out changes to the tools themselves, you can pass
#
# nix-shell --arg nixpkgs ./.
#
let let
pinnedNixpkgs = builtins.fromJSON (builtins.readFile ci/pinned-nixpkgs.json); pinnedNixpkgs = builtins.fromJSON (builtins.readFile ci/pinned-nixpkgs.json);
in
{
system ? builtins.currentSystem,
nixpkgs = fetchTarball { nixpkgs ? fetchTarball {
url = "https://github.com/NixOS/nixpkgs/archive/${pinnedNixpkgs.rev}.tar.gz"; url = "https://github.com/NixOS/nixpkgs/archive/${pinnedNixpkgs.rev}.tar.gz";
sha256 = pinnedNixpkgs.sha256; sha256 = pinnedNixpkgs.sha256;
}; },
}:
let
pkgs = import nixpkgs { pkgs = import nixpkgs {
inherit system; inherit system;
config = { }; config = { };