diff options
Diffstat (limited to 'nixpkgs/nixos/modules/image/repart-image.nix')
| -rw-r--r-- | nixpkgs/nixos/modules/image/repart-image.nix | 38 |
1 files changed, 35 insertions, 3 deletions
diff --git a/nixpkgs/nixos/modules/image/repart-image.nix b/nixpkgs/nixos/modules/image/repart-image.nix index b4a1dfe51ff3..7ac47ee32ff4 100644 --- a/nixpkgs/nixos/modules/image/repart-image.nix +++ b/nixpkgs/nixos/modules/image/repart-image.nix @@ -10,6 +10,8 @@ , systemd , fakeroot , util-linux + + # filesystem tools , dosfstools , mtools , e2fsprogs @@ -18,13 +20,19 @@ , btrfs-progs , xfsprogs + # compression tools +, zstd +, xz + # arguments -, name +, imageFileBasename +, compression , fileSystems , partitions , split , seed , definitionsDirectory +, sectorSize }: let @@ -52,14 +60,25 @@ let }; fileSystemTools = builtins.concatMap (f: fileSystemToolMapping."${f}") fileSystems; + + compressionPkg = { + "zstd" = zstd; + "xz" = xz; + }."${compression.algorithm}"; + + compressionCommand = { + "zstd" = "zstd --no-progress --threads=0 -${toString compression.level}"; + "xz" = "xz --keep --verbose --threads=0 -${toString compression.level}"; + }."${compression.algorithm}"; in -runCommand name +runCommand imageFileBasename { nativeBuildInputs = [ systemd fakeroot util-linux + compressionPkg ] ++ fileSystemTools; } '' amendedRepartDefinitions=$(${amendRepartDefinitions} ${partitions} ${definitionsDirectory}) @@ -67,6 +86,7 @@ runCommand name mkdir -p $out cd $out + echo "Building image with systemd-repart..." unshare --map-root-user fakeroot systemd-repart \ --dry-run=no \ --empty=create \ @@ -75,6 +95,18 @@ runCommand name --definitions="$amendedRepartDefinitions" \ --split="${lib.boolToString split}" \ --json=pretty \ - image.raw \ + ${lib.optionalString (sectorSize != null) "--sector-size=${toString sectorSize}"} \ + ${imageFileBasename}.raw \ | tee repart-output.json + + # Compression is implemented in the same derivation as opposed to in a + # separate derivation to allow users to save disk space. Disk images are + # already very space intensive so we want to allow users to mitigate this. + if ${lib.boolToString compression.enable}; then + for f in ${imageFileBasename}*; do + echo "Compressing $f with ${compression.algorithm}..." + # Keep the original file when compressing and only delete it afterwards + ${compressionCommand} $f && rm $f + done + fi '' |