nixpkgs/nixos/lib/make-system-tarball.nix

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{ stdenv, closureInfo, pixz
, # The file name of the resulting tarball
fileName ? "nixos-system-${stdenv.hostPlatform.system}"
, # The files and directories to be placed in the tarball.
# This is a list of attribute sets {source, target} where `source'
# is the file system object (regular file or directory) to be
# grafted in the file system at path `target'.
contents
, # In addition to `contents', the closure of the store paths listed
# in `packages' are also placed in the Nix store of the tarball. This is
# a list of attribute sets {object, symlink} where `object' if a
# store path whose closure will be copied, and `symlink' is a
# symlink to `object' that will be added to the tarball.
storeContents ? []
# Extra commands to be executed before archiving files
, extraCommands ? ""
# Extra tar arguments
, extraArgs ? ""
# Command used for compression
, compressCommand ? "pixz"
# Extension for the compressed tarball
, compressionExtension ? ".xz"
# extra inputs, like the compressor to use
, extraInputs ? [ pixz ]
}:
let
symlinks = map (x: x.symlink) storeContents;
objects = map (x: x.object) storeContents;
in
stdenv.mkDerivation {
name = "tarball";
builder = ./make-system-tarball.sh;
nativeBuildInputs = extraInputs;
inherit fileName extraArgs extraCommands compressCommand;
# !!! should use XML.
sources = map (x: x.source) contents;
targets = map (x: x.target) contents;
# !!! should use XML.
inherit symlinks objects;
closureInfo = closureInfo {
rootPaths = objects;
};
extension = compressionExtension;
}