An alternative solution to direnv dropping aliases and functions
Direnv does not support exporting aliases and functions in to the shell, because its works by running through a bash shell and extracting all environment variables from that. It just ignores the aliases and functions. 1 2 This causes aliases defined in pkgs.mkShell.shellHook not usable in the development shell.
This is also reasonable and wont-fix because direnv is shell-independent while aliases and functions are shell-dependent, as bbenne10 issued here.
A solution when using nix to it is to create a pkgs.writeScriptBin. This is an example I used as an alternative to an alias alias mu="......":
{
outputs = inputs@{ flake-parts, ... }:
flake-parts.lib.mkFlake { inherit inputs; } {
perSystem = { config, self', inputs', pkgs, system, ... }: {
devShells = {
default = pkgs.mkShellNoCC {
packages = with pkgs; [
lolcat
(writeShellScriptBin "mu" ''mv $PUBLICEXPORT_SOURCE/publicExport.zip .; unzip -o -q publicExport.zip; rm publicExport.zip'')
];
shellHook = ''
echo "use mu to extract \$PUBLICEXPORT_SOURCE/publicExport.zip here and remove source." | lolcat
'';
};
};
};
};
}