38 lines
1.2 KiB
Nix
38 lines
1.2 KiB
Nix
{ lib, stdenv, squashfsTools, closureInfo
|
|
|
|
, # The root directory of the squashfs filesystem is filled with the
|
|
# closures of the Nix store paths listed here.
|
|
storeContents ? []
|
|
, # Compression parameters.
|
|
# For zstd compression you can use "zstd -Xcompression-level 6".
|
|
comp ? "xz -Xdict-size 100%"
|
|
}:
|
|
|
|
stdenv.mkDerivation {
|
|
name = "squashfs.img";
|
|
__structuredAttrs = true;
|
|
|
|
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
|
|
|
|
'' + lib.optionalString stdenv.buildPlatform.is32bit ''
|
|
# 64 cores on i686 does not work
|
|
# fails with FATAL ERROR: mangle2:: xz compress failed with error code 5
|
|
if ((NIX_BUILD_CORES > 48)); then
|
|
NIX_BUILD_CORES=48
|
|
fi
|
|
'' + ''
|
|
|
|
# Generate the squashfs image.
|
|
mksquashfs nix-path-registration $(cat $closureInfo/store-paths) $out \
|
|
-no-hardlinks -keep-as-directory -all-root -b 1048576 -comp ${comp} \
|
|
-processors $NIX_BUILD_CORES
|
|
'';
|
|
}
|