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nixpkgs/nixos/lib/make-squashfs.nix
Eelco Dolstra df117acab7
ISO images: Initialize the Nix database with correct NAR hashes/sizes
The boot test now runs "nix verify" to ensure that all hashes are
correct.
2018-02-07 16:54:23 +01:00

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Nix

{ stdenv, squashfsTools, closureInfo
, # The root directory of the squashfs filesystem is filled with the
# closures of the Nix store paths listed here.
storeContents ? []
}:
stdenv.mkDerivation {
name = "squashfs.img";
nativeBuildInputs = [ squashfsTools ];
buildCommand =
''
closureInfo=${closureInfo { rootPaths = storeContents; }}
# Also include a manifest of the closures in a format suitable
# for nix-store --load-db.
cp $closureInfo/registration nix-path-registration
# Generate the squashfs image.
mksquashfs nix-path-registration $(cat $closureInfo/store-paths) $out \
-keep-as-directory -all-root -b 1048576 -comp xz -Xdict-size 100%
'';
}