Flake commands do not work in sha256 git repos #619

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opened 2025-01-08 12:05:57 +00:00 by kuruczgy · 2 comments

kuruczgy commented

2025-01-08 12:05:57 +00:00

Describe the bug

Flake commands do not work in sha256 git repos.

Steps To Reproduce

Create a sha256 git repo (git init --object-format=sha256)
Add flake.nix, run some flake command to generate flake.lock. This will still work since the bug only occurs with a clean working directory.
Commit your flake files.
Run some flake command (e.g. nix eval ...). You will get an error like this:
error: hash 'ae3c3c3b9dd70146d51991f2c5b9cdb4af7e65104f07e8376ac70ab2807250b0' has wrong length for hash type 'sha1'

Expected behavior

Flakes should work with any object format supported by git.

`nix --version` output

nix (Lix, like Nix) 2.91.1

Additional context

I found this CppNix issue: https://github.com/NixOS/nix/issues/9980 , but it was said on Matrix that Lix does not use libgit2, so probably the issue is something different?

## Describe the bug Flake commands do not work in sha256 git repos. ## Steps To Reproduce 1. Create a sha256 git repo (`git init --object-format=sha256`) 2. Add `flake.nix`, run some flake command to generate `flake.lock`. This will still work since the bug only occurs with a clean working directory. 3. Commit your flake files. 4. Run some flake command (e.g. `nix eval ...`). You will get an error like this: `error: hash 'ae3c3c3b9dd70146d51991f2c5b9cdb4af7e65104f07e8376ac70ab2807250b0' has wrong length for hash type 'sha1'` ## Expected behavior Flakes should work with any object format supported by git. ## `nix --version` output `nix (Lix, like Nix) 2.91.1` ## Additional context I found this CppNix issue: https://github.com/NixOS/nix/issues/9980 , but it was said on Matrix that Lix does not use libgit2, so probably the issue is something different?

kuruczgy added the

bug

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2025-01-08 12:05:57 +00:00

kuruczgy commented

2025-01-08 14:48:31 +00:00

Author

Just checked, bug still present on main (3413ab5629).

Just checked, bug still present on `main` (3413ab56292f12ac03ee49270bcaf16038020cb3).

jade added the

Area/flakes

Area/fetching

labels

2025-01-17 21:43:42 +00:00

arbel-arad commented

2025-01-24 23:12:55 +00:00

looks like it's still true on version nix (Lix, like Nix) 2.92.0
trying to use a SHA256 flake input results in:

fetching Git repository 'https://forgejo.spacetime.technology/arbel/nix-assets'fatal: mismatched algorithms: client sha1; server sha256
error:
       … while updating the lock file of flake 'git+file:///etc/nixos'

       … while updating the flake input 'nix-assets'

       … while fetching the input 'git+https://forgejo.spacetime.technology/arbel/nix-assets?shallow=1'

       error: program 'git' failed with exit code 128

looks like it's still true on version `nix (Lix, like Nix) 2.92.0` trying to use a SHA256 flake input results in: ```sh fetching Git repository 'https://forgejo.spacetime.technology/arbel/nix-assets'fatal: mismatched algorithms: client sha1; server sha256 error: … while updating the lock file of flake 'git+file:///etc/nixos' … while updating the flake input 'nix-assets' … while fetching the input 'git+https://forgejo.spacetime.technology/arbel/nix-assets?shallow=1' error: program 'git' failed with exit code 128 ```