This way, you can do things like git checkout channels/nixos-14.12 to get the latest tested and built version of NixOS.
		
			
				
	
	
		
			61 lines
		
	
	
		
			1.6 KiB
		
	
	
	
		
			Nix
		
	
	
	
	
	
			
		
		
	
	
			61 lines
		
	
	
		
			1.6 KiB
		
	
	
	
		
			Nix
		
	
	
	
	
	
# This module generates the nixos-checkout script, which performs a
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# checkout of the Nixpkgs Git repository.
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{ config, lib, pkgs, ... }:
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with lib;
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let
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  nixosCheckout = pkgs.substituteAll {
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    name = "nixos-checkout";
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    dir = "bin";
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    isExecutable = true;
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    src = pkgs.writeScript "nixos-checkout"
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      ''
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        #! ${pkgs.stdenv.shell} -e
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        if [ "$1" == "-h" ] || [ "$1" == "--help" ]; then
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          echo "Usage: `basename $0` [PREFIX]. See NixOS Manual for more info."
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          exit 0
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        fi
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        prefix="$1"
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        if [ -z "$prefix" ]; then prefix=/etc/nixos; fi
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        mkdir -p "$prefix"
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        cd "$prefix"
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        if [ -z "$(type -P git)" ]; then
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            echo "installing Git..."
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            nix-env -iA nixos.pkgs.git || nix-env -i git
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        fi
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        # Move any old nixpkgs directories out of the way.
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        backupTimestamp=$(date "+%Y%m%d%H%M%S")
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        if [ -e nixpkgs -a ! -e nixpkgs/.git ]; then
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            mv nixpkgs nixpkgs-$backupTimestamp
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        fi
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        # Check out the Nixpkgs sources.
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        if ! [ -e nixpkgs/.git ]; then
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            echo "Creating repository in $prefix/nixpkgs..."
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            git init --quiet nixpkgs
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        else
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            echo "Updating repository in $prefix/nixpkgs..."
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        fi
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        cd nixpkgs
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        git remote add origin git://github.com/NixOS/nixpkgs.git || true
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        git remote add channels git://github.com/NixOS/nixpkgs-channels.git || true
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        git remote set-url origin --push git@github.com:NixOS/nixpkgs.git
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        git remote update
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        git checkout master
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      '';
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   };
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in
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{
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  environment.systemPackages = [ nixosCheckout ];
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}
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