Packaging python app with poetry2nix using nix flakes
Background I have some backup logs that have failures I wanted to search and recently came across toolong but it is not currently in nixpkgs. I figured this is a good chance to try out poetry2nix I keep reading about and went through the process of packaging this so I could use it easily with nix.
Setup
$ git clone https://github.com/Textualize/toolong
$ cd toolong
$ echo "use flake" >> .envrc && direnv allow
$ echo "result" >> .gitignore
$ echo ".direnv" >> .gitignore
$ nix flake init --template github:nix-community/poetry2nix
$ rm -rf ./app/__init__.py
$ git add flake.nix
$ git add flake.lock
$ nix build
error: builder for '/nix/store/3hg2l7lki8rirq5jkvz82mm6fy9559gl-python3.11-toolong-1.4.0.drv' failed with exit code 1;
last 10 log lines:
> Creating a wheel...
> * Getting build dependencies for wheel...
> * Building wheel...
> Successfully built toolong-1.4.0-py3-none-any.whl
> Finished creating a wheel...
> Finished executing pypaBuildPhase
> Running phase: pythonRuntimeDepsCheckHook
> Executing pythonRuntimeDepsCheck
> Checking runtime dependencies for toolong-1.4.0-py3-none-any.whl
> - textual<0.53.0,>=0.52.0 not satisfied by version 0.50.1
For full logs, run 'nix log /nix/store/3hg2l7lki8rirq5jkvz82mm6fy9559gl-python3.11-toolong-1.4.0.drv'.
To fix this error I updated the pin for textual.
-textual = "^0.52.0"
+textual = "0.52.0"
$ poetry update textual
$ nix build
warning: Git tree '/Users/matt/Source/toolong' is dirty
$ ls ./result/bin
tl
Success!
Check these files into git using my fork
$ nix run
error: unable to execute '/nix/store/m6395khh8givi8kb7a2zyrcda8dfzgka-python3.11-toolong-1.4.0/bin/toolong': No such file or directory
I’m not sure how to fix this issue. I tried several different things in the flake.nix to override the binary name but none seemed to work. Running this did though. This isn’t a problem when adding it as a custom input though tl will be part of the system path.
$ ./result/bin/tl
Usage: tl [OPTIONS] FILE1 FILE2
View / tail / search log files.
Options:
--version Show the version and exit.
-m, --merge Merge files.
-o, --output-merge PATH Path to save merged file (requires -m).
--help Show this message and exit.
Install into environment
Add files to my nixfiles and reference my fork
# flake.nix
+ toolong = {
+ url = "github:icecreammatt/toolong";
+ inputs.nixpkgs.follows = "nixpkgs";
+ };
# configuration.nix
environment.systemPackages = with pkgs; [
bash
inputs.helix-flake.packages."${system}".helix
+ inputs.toolong.packages."${system}".toolong
];
$ darwin-rebuild switch --flake .
...
$ tl
Usage: tl [OPTIONS] FILE1 FILE2
View / tail / search log files.
Options:
--version Show the version and exit.
-m, --merge Merge files.
-o, --output-merge PATH Path to save merged file (requires -m).
--help Show this message and exit.