bcachefs: revert using json to hold bcachefs commits/hashes

The json appearantly contained the wrong checksum and we don't have a way to generate this

pkgs/os-specific/linux/kernel/bcachefs.json

···
-{
-  "diffHash": "sha256-BmXd/5Hn/xr7gNFp6BsBMG2XeKFlPGxv66IQ8DEwh5k=",
-  "commit": "4d2faeb4fb58c389dc9f76b8d5ae991ef4497e04",
-  "date": "2023-09-28"
-}

pkgs/os-specific/linux/kernel/linux-testing-bcachefs.nix

···
 , stdenv
 , fetchpatch
 , kernel
+, commitDate ? "2023-06-28"
 # bcachefs-tools stores the expected-revision in:
 #   https://evilpiepirate.org/git/bcachefs-tools.git/tree/.bcachefs_revision
 # but this does not means that it'll be the latest-compatible revision
-, version ? lib.importJSON ./bcachefs.json
+, currentCommit ? "4d2faeb4fb58c389dc9f76b8d5ae991ef4497e04"
+, diffHash ? "sha256-DtMc8P4lTRzvS6PVvD7WtWEPsfnxIXSpqMsKKWs+edI="
 , kernelPatches # must always be defined in bcachefs' all-packages.nix entry because it's also a top-level attribute supplied by callPackage
 , argsOverride ? {}
 , ...
 } @ args:
-let localversion = "-bcachefs-unstable-${version.date}";
-in
 # NOTE: bcachefs-tools should be updated simultaneously to preserve compatibility
 (kernel.override ( args // {
 
   argsOverride = {
-    version = "${kernel.version}${localversion}";
-    modDirVersion = "${kernel.version}${localversion}";
+    version = "${kernel.version}-bcachefs-unstable-${commitDate}";
+    modDirVersion = kernel.modDirVersion;
 
     extraMeta = {
       homepage = "https://bcachefs.org/";
···
   } // argsOverride;
 
   structuredExtraConfig = with lib.kernel; {
-    # we need this for uname
-    LOCALVERSION = freeform localversion;
     BCACHEFS_FS = module;
     BCACHEFS_QUOTA = option yes;
     BCACHEFS_POSIX_ACL = option yes;
···
   };
 
   kernelPatches = [ {
-      name = "bcachefs-${version.commit}";
+      name = "bcachefs-${currentCommit}";
 
       patch = fetchpatch {
-        name = "bcachefs-${version.commit}.diff";
-        url = "https://evilpiepirate.org/git/bcachefs.git/rawdiff/?id=${version.commit}&id2=v${lib.versions.majorMinor kernel.version}";
-        sha256 = version.diffHash;
+        name = "bcachefs-${currentCommit}.diff";
+        url = "https://evilpiepirate.org/git/bcachefs.git/rawdiff/?id=${currentCommit}&id2=v${lib.versions.majorMinor kernel.version}";
+        sha256 = diffHash;
       };
     } ] ++ kernelPatches;
 }))

pkgs/tools/filesystems/bcachefs-tools/default.nix

···
 , rustPlatform
 , makeWrapper
 , fuseSupport ? false
-, version ? lib.importJSON ./version.json
 }:
+let
+  rev = "6b175a022496572416918bd38d083120c23ba5f2";
+in
 stdenv.mkDerivation {
   pname = "bcachefs-tools";
-  version = "unstable-${version.date}";
+  version = "unstable-2023-09-29";
 
-  src = fetchFromGitHub (builtins.removeAttrs version ["date"]);
+
+  src = fetchFromGitHub {
+    owner = "koverstreet";
+    repo = "bcachefs-tools";
+    inherit rev;
+    hash = "sha256-qC6Bq2zdO8Tj+bZbIUvcVBqvuKccqDEX3HIeOXsEloQ=";
+  };
 
   nativeBuildInputs = [
     pkg-config
···
 
   makeFlags = [
     "PREFIX=${placeholder "out"}"
-    "VERSION=${lib.strings.substring 0 7 version.rev}"
+    "VERSION=${lib.strings.substring 0 7 rev}"
     "INITRAMFS_DIR=${placeholder "out"}/etc/initramfs-tools"
   ];
 

pkgs/tools/filesystems/bcachefs-tools/version.json

···
-{
-  "owner": "koverstreet",
-  "repo": "bcachefs-tools",
-  "rev": "6b175a022496572416918bd38d083120c23ba5f2",
-  "sha256": "qC6Bq2zdO8Tj+bZbIUvcVBqvuKccqDEX3HIeOXsEloQ=",
-  "date": "2023-09-29"
-}