question: standalone home-manager copies untracked files to /nix/store/****-source

[shirakami-chigusa]

Are you following the right branch?

• [X] My Nixpkgs and Home Manager versions are in sync

Is there an existing issue for this?

• [X] I have searched the existing issues

Issue description

I'm having trouble because files that are excluded with .gitignore are copied to /nix/store/12afkpbag242i7w9lb26bk**********-source/.

I confirmed by the following steps:

1. create untracked file ~/.config/home-manager/test-untracked.txt.
2. run home-manager swith with flake.nix. ~/.config/home-manager itself is copied to /nix/store/12afkpbag242i7w9lb26bk**********-source/ as source tree.
3. fd -IH "test-untracked.txt" /nix/store/ shows /nix/store/12afkpbag242i7w9lb26bk**********-source/test-untracked.txt

/nix/store/12afkpbag242i7w9lb26bk**********_source includes untracked cache files .DS_Store .git .lsp/.cache .clj-kondo/.cache. test-untracked.txt is also included.

In particular, .clj-kondo/.cache takes a long time to copy because it is over 50MB and consists of over 10,000 small files. If .clj-kondo/.cache exists, time home-manager switch will be about 30 seconds. If it is removed it will be 3 seconds.

These cache files are listed in .gitignore, but home-manager switch does not seem to use .gitignore. Is there a source filter for the .config/home-manager directory?

Is this a flake issue rather than a home-manager issue? I think the nixos-rebuild switch does not copy untracked files, but the home-manager switch does copy them.

Maintainer CC

No response

System information

- system: `"aarch64-darwin"`
 - host os: `Darwin 23.5.0, macOS 14.5`
 - multi-user?: `yes`
 - sandbox: `no`
 - version: `nix-env (Nix) 2.20.5`
 - nixpkgs: `/nix/store/rhg90jpryc286xn9xjy6qjiaap6pjgdc-source`

I am not using nix-darwin. using home-manager switch.

[shirakami-chigusa]

Since the nixos-rebuild switch depends on git, the test-untracked.txt that has not been added will not be copied.

So when I ran home-manager as nixosModules, it correctly ignored test-untracked.txt.

touch test-untraced.txt
sudo nixos-rebuild switch --flake .#foo
fd "test-untracked.txt" /nix/store/
# print nothing.

git add test-untraced.txt
sudo nixos-rebuild switch --flake .#foo
fd "test-untracked.txt" /nix/store/
# print /nix/store/8qwq3ic74whwc18yvwrzxmynlx7qh457-source/test-untracked.txt

The standalone home-manager switch does not ignore test-untracked.txt.

System information

 - system: `"x86_64-linux"`
 - host os: `Linux 6.6.37, NixOS, 24.05 (Uakari), 24.05.20240711.a046c12`
 - multi-user?: `yes`
 - sandbox: `yes`
 - version: `nix-env (Nix) 2.18.4`
 - nixpkgs: `/nix/store/2k0r4pk0hzjzk9iwyi61xc0z4qv791j9-source`

[shirakami-chigusa]

I also tested it on nix-darwin.

touch test-untraced.txt
darwin-rebuild switch --flake .
fd "test-untracked.txt" /nix/store/
# print nothing.

git add test-untraced.txt
darwin-rebuild switch --flake .
fd "test-untracked.txt" /nix/store/
# print /nix/store/wdx2n3l5vi72l9a2sqppzila41lg7icq-source/zxcvb.txt

System information

 - system: `"aarch64-darwin"`
 - host os: `Darwin 23.5.0, macOS 14.5`
 - multi-user?: `yes`
 - sandbox: `no`
 - version: `nix-env (Nix) 2.18.5`
 - nixpkgs: `/nix/store/038zs5b21569pjv6v0dwhi6fd95jbzvx-source