maint: Move to /rust/* to /

This makes it easier for tooling to find the Rust stuff.
Rust/non-rust is not a useful distinction in this repo anymore anyway.

dev/flake-module.nix

@@ -16,7 +16,7 @@
       pre-commit.settings.hooks.nixfmt-rfc-style.enable = true;
       # Temporarily disable rustfmt due to configuration issues
       # pre-commit.settings.hooks.rustfmt.enable = true;
-      pre-commit.settings.settings.rust.cargoManifestPath = "./rust/Cargo.toml";
+      pre-commit.settings.settings.rust.cargoManifestPath = "./Cargo.toml";
 
       # Check that we're using ///-style doc comments in Rust code.
       #
@@ -78,7 +78,7 @@
         ];
         shellHook = ''
           ${config.pre-commit.installationScript}
-          source ${../rust/bindgen-gcc.sh}
+          source ${../bindgen-gcc.sh}
           echo 1>&2 "Welcome to the development shell!"
         '';
         # rust-analyzer needs a NIX_PATH for some reason

doc/hacking/test-ffi.md

@@ -3,9 +3,9 @@
 
 If `cargo-valgrind` is broken, you may run `valgrind` manually.
 
-1. `cd rust; cargo test -v`
+1. `cargo test -v`
 2. find the relevant test suite executable in the log
-    - example: `/home/user/src/nix-bindings-rust/rust/target/debug/deps/nix_util-036ec381a9e3fd6d`
+    - example: `/home/user/src/nix-bindings-rust/target/debug/deps/nix_util-036ec381a9e3fd6d`
 3. `valgrind --leak-check=full <paste the test exe>`
 4. check that
     - `definitely lost: 0 bytes in 0 blocks`

flake.nix

@@ -21,7 +21,7 @@
         imports = [
           inputs.nix-cargo-integration.flakeModule
           inputs.flake-parts.flakeModules.partitions
-          ./rust/nci.nix
+          ./nci.nix
         ];
         systems = [
           "x86_64-linux"