30 lines
914 B
Nix
30 lines
914 B
Nix
{ stdenv, squashfsTools, perl, pathsFromGraph
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, # The root directory of the squashfs filesystem is filled with the
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# closures of the Nix store paths listed here.
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storeContents ? []
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}:
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stdenv.mkDerivation {
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name = "squashfs.img";
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buildInputs = [perl squashfsTools];
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# For obtaining the closure of `storeContents'.
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exportReferencesGraph =
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map (x: [("closure-" + baseNameOf x) x]) storeContents;
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buildCommand =
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''
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# Add the closures of the top-level store objects.
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storePaths=$(perl ${pathsFromGraph} closure-*)
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# Also include a manifest of the closures in a format suitable
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# for nix-store --load-db.
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printRegistration=1 perl ${pathsFromGraph} closure-* > nix-path-registration
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# Generate the squashfs image.
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mksquashfs nix-path-registration $storePaths $out \
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-keep-as-directory -all-root -b 1048576 -comp xz -Xdict-size 100%
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'';
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}
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