forked from mirrors/nixpkgs
0aeba64fb2
the nix store may contain hardlinks: derivations may output them directly, or users may be using store optimization which automatically hardlinks identical files in the nix store. The presence of these links are intended to be a 'transparent' optimization. However, when creating a squashfs image, the image will be different depending on whether hard links were present on the filesystem, leading to reproducibility problems. By passing '-no-hardlinks' to mksquashfs the files are stored as duplicates in the squashfs image. Since squashfs has support for duplicate files this does not lead to a larger image. For more details see https://github.com/NixOS/nixpkgs/issues/114331
44 lines
1.2 KiB
Nix
44 lines
1.2 KiB
Nix
{ lib, stdenv, fetchFromGitHub, zlib, xz
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, lz4
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, zstd
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}:
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stdenv.mkDerivation {
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pname = "squashfs";
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version = "4.4";
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src = fetchFromGitHub {
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owner = "plougher";
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repo = "squashfs-tools";
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sha256 = "0697fv8n6739mcyn57jclzwwbbqwpvjdfkv1qh9s56lvyqnplwaw";
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# Tag "4.4" points to this commit.
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rev = "52eb4c279cd283ed9802dd1ceb686560b22ffb67";
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};
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patches = [
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# This patch adds an option to pad filesystems (increasing size) in
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# exchange for better chunking / binary diff calculation.
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./4k-align.patch
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# Add -no-hardlinks option. This is a rebased version of
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# c37bb4da4a5fa8c1cf114237ba364692dd522262, can be removed
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# when upgrading to the next version after 4.4
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./0001-Mksquashfs-add-no-hardlinks-option.patch
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] ++ lib.optional stdenv.isDarwin ./darwin.patch;
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buildInputs = [ zlib xz zstd lz4 ];
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preBuild = "cd squashfs-tools";
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installFlags = [ "INSTALL_DIR=\${out}/bin" ];
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makeFlags = [ "XZ_SUPPORT=1" "ZSTD_SUPPORT=1" "LZ4_SUPPORT=1" ];
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meta = {
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homepage = "http://squashfs.sourceforge.net/";
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description = "Tool for creating and unpacking squashfs filesystems";
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platforms = lib.platforms.unix;
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license = lib.licenses.gpl2Plus;
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maintainers = with lib.maintainers; [ ruuda ];
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};
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}
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