add nix shell

.envrc

@@ -0,0 +1 @@
+use nix

.gitignore

@@ -1,3 +1,24 @@
-/target
-/Cargo.lock
+# Created by https://www.toptal.com/developers/gitignore/api/rust,direnv
+# Edit at https://www.toptal.com/developers/gitignore?templates=rust,direnv
 
+### direnv ###
+.direnv
+.envrc
+
+### Rust ###
+# Generated by Cargo
+# will have compiled files and executables
+debug/
+target/
+
+# Remove Cargo.lock from gitignore if creating an executable, leave it for libraries
+# More information here https://doc.rust-lang.org/cargo/guide/cargo-toml-vs-cargo-lock.html
+Cargo.lock
+
+# These are backup files generated by rustfmt
+**/*.rs.bk
+
+# MSVC Windows builds of rustc generate these, which store debugging information
+*.pdb
+
+# End of https://www.toptal.com/developers/gitignore/api/rust,direnv

shell.nix

@@ -0,0 +1,13 @@
+let pkgs = import <nixos-23.11> { };
+
+in pkgs.mkShell {
+  nativeBuildInputs = [
+    # Rust
+    pkgs.rustc
+    pkgs.rustup
+    pkgs.rustfmt
+
+    # LSP
+    pkgs.rust-analyzer
+  ];
+}