40 lines
		
	
	
	
		
			770 B
		
	
	
	
		
			Nix
		
	
	
	
	
	
			
		
		
	
	
			40 lines
		
	
	
	
		
			770 B
		
	
	
	
		
			Nix
		
	
	
	
	
	
{ lib, config, ... }:
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let
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  cfg = config.systemModules.user.shell;
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in
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{
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  imports = [
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    ./fish
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    # ./bash
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    # ./zsh
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  ];
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  options.systemModules.user.shell = {
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    fish = {
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      enable = lib.mkEnableOption "Enable fish as the user shell";
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    };
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    zsh = {
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      enable = lib.mkEnableOption "Enable zsh as the user shell";
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    };
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    bash = {
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      enable = lib.mkEnableOption "Enable bash as the user shell";
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    };
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  };
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   config = { 
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    assertions = [
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      {
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        assertion = 
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          (lib.length (lib.filter (x: x) [
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            cfg.fish.enable or false
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            cfg.zsh.enable or false
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            cfg.bash.enable or false
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          ]) <= 1); 
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        message = "Only one user shell can be active in the configuration";
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      }
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    ];
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  };
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}
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