update nix and add dev shell #769
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We update the lock on the nix flake and also add a dev shell. This means you can do `nix build` to build the project and `nix develop` to drop into a development environment with cmake and clang. Signed-off-by: Ali Caglayan <alizter@gmail.com>
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Thank you! I need to spend some time to understand nix again. Thanks for your patience. |
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No worries! Let me know if you have any questions. |
| let pkgs = import nixpkgs { inherit system; }; in | ||
| let llvm = pkgs.llvmPackages_latest; in | ||
| { | ||
| packages = rec { |
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Question: I observed the construct with:
packages = rec {
default = ...
ftxui = default
}worked better than:
packages.ftxui = ...I don't understand why. Would you have an explanation?
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Hi, good question! When you go to a project and do a literal nix build then nix tries to build the "default" package in the flake. The previous setup called this ftxui which is not really useful since there is basically only one package to build here. I therefore renamed the existing packages.ftxui to packages.default, allowing nix build to work without any extra arguments.
In order to not break anybody else's workflow, I added packages.ftxui back in as an alias of packages.default. In Nix, if you are defining a set where one element refers to another at the time of definition, you will need it to be a recursive definition, hence the rec flag.
If you are happy with the rename, you can remove packages.ftxui and the rec flag. (You might have to also update any documentation you have for building the flake).
Also, notice that the default devShell is called devShells.default which allows you to do a simple nix develop in the repo in order to setup a dev environment. This is different from building the project as it also setups the development tools. In this case clang and cmake.
Hopefully that clears some things up!
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Thanks! |
We update the lock on the nix flake and also add a dev shell. This means you can do `nix build` to build the project and `nix develop` to drop into a development environment with cmake and clang. Signed-off-by: Ali Caglayan <alizter@gmail.com> Co-authored-by: ArthurSonzogni <sonzogniarthur@gmail.com>
We update the lock on the nix flake and also add a dev shell. This means you can do
nix buildto build the project andnix developto drop into a development environment with cmake and clang.