nixpkgs/pkgs/os-specific/linux/btrfsprogs/default.nix

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a :
let
fetchurl = a.fetchurl;
version = a.lib.attrByPath ["version"] "0.19" a;
buildInputs = with a; [
zlib e2fsprogs acl
];
in
rec {
src = fetchurl {
url = "http://www.kernel.org/pub/linux/kernel/people/mason/btrfs/btrfs-progs-${version}.tar.bz2";
sha256 = "1z3hmfgv7h489gnh55abm0gzyf2cgjkybhfc2rnm0cvsx01xv8zq";
};
inherit buildInputs;
configureFlags = [];
makeFlags = ["prefix=$out"];
phaseNames = ["doEnsureBtrfsImage" "doMakeInstall"];
doEnsureBtrfsImage = a.fullDepEntry (''
if ! grep 'progs = ' Makefile | grep btrfs-image; then
sed -e 's/progs = .*/& btrfs-image/' -i Makefile
fi
'') ["minInit" "doUnpack"];
name = "btrfs-progs-" + version;
meta = {
description = "BTRFS utilities";
};
}