30 lines
941 B
Nix
30 lines
941 B
Nix
{
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stdenv
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, busybox
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, buildPackages
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, callPackage
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, pseudofile
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, runCommand
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, writeText
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} : config :
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let
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pseudofiles =
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pseudofile.write "config.etc" (config.environment.contents);
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storefs = callPackage <nixpkgs/nixos/lib/make-squashfs.nix> {
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# 1) Every required package is referenced from somewhere
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# outside /nix/store. 2) Every file outside the store is
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# specified by config.environment. 3) Therefore, closing over
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# the pseudofile will give us all the needed packages
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storeContents = [ pseudofiles ];
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};
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in runCommand "frob-squashfs" {
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nativeBuildInputs = with buildPackages; [ squashfsTools qprint ];
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} ''
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cp ${storefs} ./store.img
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chmod +w store.img
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mksquashfs - store.img -no-recovery -quiet -no-progress -root-becomes store -p "/ d 0755 0 0"
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mksquashfs - store.img -no-recovery -quiet -no-progress -root-becomes nix -p "/ d 0755 0 0" -pf ${pseudofiles}
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cp store.img $out
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''
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