Don't touch sources.json when update has no changes?

[will]

Hi, thanks for npins!

I was wondering if it'd be possible to not touch the npins/sources.json file after running npins update and there weren't any changes?

❯ ls -la npins/sources.json
.rw-r--r-- will staff 13 KB Wed Oct  2 13:56:29 2024 npins/sources.json

❯ npins update
... omitting several lines, all  (no changes)
[INFO ] Update successful.
evaluating derivation 'git+file:///Users/will/code/verycoolproject#devShells.aarch64-darwin.default'direnv: ([/nix/store/439f5yi8i1akxl2669f5mam6iacisycv-direnv-2.34.0/bin/direnv export fish]) is taking a while to execute. Use CTRL-C to give up.

❯ ls -la npins/sources.json
.rw-r--r-- will staff 13 KB Wed Oct  2 13:57:39 2024 npins/sources.json

The contents of the file do not change, which is expected, but the timestamp changes. This seems to cause direnv to reload the devshell, since I have it watching that file.

It's not the end of the world, but it'd be nice to not have to wait for the nix re-evaluation when it's not necessary.