explicitly define project root in treefmt

[conscious-puppet]

specifying projectRoot in treefmt fixes #45

treefmt-check> treefmt 0.6.1
treefmt-check> [INFO ] #nixpkgs-fmt: 26 files processed in 31.84ms
treefmt-check> 0 files changed in 37ms (found 42, matched 26, cache misses 26)
treefmt-check> On branch main
treefmt-check> nothing to commit, working tree clean

[shivaraj-bh]

@srid running nix run nixpkgs#nixci seems to work with this PR, i.e treefmt checks all nix files, but nix run github:srid/nixci doesn’t, any idea what might’ve changed?

[shivaraj-bh]

with nixpkgs#nixci:

❯ nix run nixpkgs#nixci
🍏 .
🐚 nix --extra-experimental-features 'nix-command flakes' eval '.#nixci.default' --json️
🍎 default.dev
🐚 nix --extra-experimental-features 'nix-command flakes' flake lock --no-update-lock-file '.?dir=./dev'️
warning: Git tree '/home/shivaraj/juspay/services-flake' is dirty
🐚 nix --extra-experimental-features 'nix-command flakes' build '/nix/store/p8vfkmfh43yy8lmz1r65dr9yq3ql7cd7-source#default' -L --no-link --print-out-paths --override-input flake '.?dir=./dev' --refresh -j auto️
warning: Git tree '/home/shivaraj/juspay/services-flake' is dirty
/nix/store/r2g40v56xwfbfqlfdp81p4i6plxnfpdv-nix-shell
/nix/store/3lz7sywmw7rcc7vnc2v7cfx3jfflvsjf-treefmt-check
...

with github:srid/nixci:

❯ nix run github:srid/nixci
🍏 .
🐚 nix --extra-experimental-features 'nix-command flakes' eval '.#nixci.default' --json️
🐚 nix --extra-experimental-features 'nix-command flakes' show-config --json️
🍎 default.dev
🐚 nix --extra-experimental-features 'nix-command flakes' flake lock --no-update-lock-file path:././dev️
🐚 nix --extra-experimental-features 'nix-command flakes' build '/nix/store/p8vfkmfh43yy8lmz1r65dr9yq3ql7cd7-source#default' -L --no-link --print-out-paths --override-input flake path:././dev --refresh -j auto️
error (ignored): error: reached end of FramedSource
error:
       … while calling the 'derivationStrict' builtin

         at /builtin/derivation.nix:9:12: (source not available)

       … while evaluating derivation 'devour-output'
         whose name attribute is located at /nix/store/qjqzr7905xxv3rv70z7mkpp06lalnzzb-source/pkgs/stdenv/generic/make-derivation.nix:300:7

       … while evaluating attribute 'text' of derivation 'devour-output'

         at /nix/store/qjqzr7905xxv3rv70z7mkpp06lalnzzb-source/pkgs/build-support/trivial-builders/default.nix:148:16:

          147|     runCommand name
          148|       { inherit text executable checkPhase allowSubstitutes preferLocalBuild;
             |                ^
          149|         passAsFile = [ "text" ];

       (stack trace truncated; use '--show-trace' to show the full trace)

       error: opening file '/nix/store/00p454skn3x07s3k6zwrixmyzhn1hyqb-Cabal-3.10.2.1-doc.lock': Permission denied
Error: devour-flake failed to run (exited: 1)

[shivaraj-bh]

I think it is do with this:

--override-input flake '.?dir=./dev'

vs

--override-input flake path:././dev

[srid]

I saw the same error before, but didn't think it was due to the latest nixci (not sure how it is related even):

https://nixos.zulipchat.com/#narrow/stream/413948-nixos/topic/Self-hosted.20GitHub.20runners/near/421222981

[srid]

We switched from dir to path in juspay/omnix#115

[srid]

Is this legal in pure evaluation? AFAIU, a flake (or sub-flake) cannot refer to contents outside its containing directory.

Try running nix with sandbox enabled; I think it is disabled by default on macOS.

[conscious-puppet]

i ran the command with sandbox on ubuntu. treefmt is able to scan 26 files.

[shivaraj-bh]

Looks good! Thanks for the contrib