EDIT: This is an “any way I can do it” question, so if there’s a “build a flake” way I can read about, great. If there’s a nix shell way I can do it, that’s great too. I’ll work with whatever approach you can point me toward.
I am attempting to do work on a git commit of the dwl project.
Though I can build git dwl using the overrides below, I have been wrestling and failing for days to set up a nix develop or nix shell environment in which I can actually do any work on the code.
I am unable thus far to even get wayland-scanner directly available in a nix shell environment. The “package” for wayland-scanner appears to be the package for wayland … which DEPENDS ON wayland-scanner??
Even
$ nix shell wayland-scanner
produces an environment in which
$ pkg-config --variable=wayland_scanner wayland-scanner
yields
Package wayland-scanner was not found in the pkg-config search path. )
I am not looking for someone to just solve the problem for me. I can read and learn, but so far, I just cannot find what to read to understand how to build a flake with the overrides that work in “normal” nix code. I cannot structure final: prev: inside a flake.nix in a fashion that does not error out.
Please point me toward documentation.
I wrote this set of overrides and it works well to build git dwl against git wlroots but I am unable to cram this into a flake.nix:
{
config = {
home.packages = with pkgs; [
dwl
(pkgs.writeScriptBin "startdwl" ''
#!/usr/bin/env bash
[[ -n $(${pkgs.kmod}/bin/lsmod | ${pkgs.gnugrep}/bin/grep nvidia) ]] && export WLR_NO_HARDWARE_CURSORS=1
dwl -d > "${config.home.homeDirectory}"/.cache/dwltags 2>"${config.home.homeDirectory}"/.cache/dwl.log
'')
];
nixpkgs.overlays = [
(final: prev: {
dwl = (prev.dwl.override {
conf = pkgs.concatText "dwl-config.h"
[
./dwl_config_define_preface.h
(
pkgs.concatText "dwl-config-intermediate.h"
[
(pkgs.writeText "dwl-hostname.h"
("#define BUILD_HOST " + lib.strings.toUpper hostName + "\n")
)
./dwl_config_body.h
]
)
];
wlroots = prev.wlroots.overrideAttrs (previousAttrs: rec {
version = "git";
src = prev.fetchFromGitLab {
domain = "gitlab.freedesktop.org";
owner = "wlroots";
repo = "wlroots";
rev = "2f3ea459";
hash = "sha256-6qhXItNSp5I5xH4SxmQ9GtO8D7+kncnKNo/oSuzr2gE=";
};
});
}).overrideAttrs (previousAttrs: rec {
version = "wlroots-next";
src = prev.fetchFromGitea {
domain = "codeberg.org";
owner = "fauxmight";
repo = "dwl";
rev = "931f6df";
hash = "sha256-d1fX0iwkQyVFpWuN7nzHiIwyrpqIpqhHb5n2ExrIGfQ=";
};
});
})
];
};
}