move Rust sources to top level, C sources into c_src

This moves the Rust sources out of rust_src/ and into the top level.
Running the bcachefs executable out of the development tree is now:

$ ./target/release/bcachefs command
or
$ cargo run --profile release -- command

instead of "./bcachefs command".

Building and installing is still:

$ make && make install

Signed-off-by: Thomas Bertschinger <tahbertschinger@gmail.com>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

1 files changed, 2 insertions, 2 deletions

diff --git a/build.nix b/build.nix
index 831c7e9f..a37a6c6e 100644
--- a/build.nix
+++ b/build.nix
@@ -35,12 +35,12 @@ in stdenv.mkDerivation {
 
   BCACHEFS_FUSE = if fuseSupport then "1" else "";
 
-  cargoRoot = "rust-src";
+  cargoRoot = ".";
   # when git-based crates are updated, run:
   # nix run github:Mic92/nix-update -- --version=skip --flake default
   # to update the hashes
   cargoDeps = rustPlatform.importCargoLock {
-    lockFile = "${src}/rust-src/Cargo.lock";
+    lockFile = "${src}/Cargo.lock";
     outputHashes = {
       "bindgen-0.64.0" = "sha256-GNG8as33HLRYJGYe0nw6qBzq86aHiGonyynEM7gaEE4=";
     };