Expose better errors

.envrc

@@ -0,0 +1 @@
+use_flake

.gitignore

@@ -1,3 +1,7 @@
 *~
 target
 Cargo.lock
+
+# Nix
+.direnv/
+result*

Cargo.toml

@@ -14,3 +14,4 @@ edition = "2018"
 encoding = "0.2.33"
 lazy_static = "1.4.0"
 regex = "1.5.5"
+thiserror = "1.0.38"

flake.nix

@@ -0,0 +1,44 @@
+{
+  description = "serde_divatree";
+
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs";
+    flake-utils.url = "github:numtide/flake-utils";
+    rust-overlay.url = "github:oxalica/rust-overlay";
+    crane = {
+      url = "github:ipetkov/crane";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+  };
+
+  outputs = {
+    self,
+    nixpkgs,
+    flake-utils,
+    rust-overlay,
+    crane,
+  }: let
+  in
+    flake-utils.lib.eachDefaultSystem
+    (system: let
+        pkgs = import nixpkgs {
+          inherit system;
+          overlays = [ (import rust-overlay) ];
+        };
+        rustToolchain = pkgs.rust-bin.selectLatestNightlyWith (toolchain: toolchain.default.override {
+          extensions = [ "rust-src" "rust-analyzer" ];
+        });
+        craneLib = crane.lib.${system};
+      in rec {
+        devShells.default = with pkgs; pkgs.mkShell rec {
+          nativeBuildInputs = [
+            pkg-config
+          ];
+          buildInputs = [
+            rustToolchain
+            cargo-semver-checks
+          ];
+        };
+      }
+    );
+}