nix: init tooling

nix/package.nix

@@ -0,0 +1,37 @@
+{
+  lib,
+  rustPlatform,
+}: let
+  fs = lib.fileset;
+
+  lockfile = ../Cargo.lock;
+  cargoToml = ../Cargo.toml;
+in
+  rustPlatform.buildRustPackage {
+    pname = "eris";
+    version = "0.0.1";
+
+    src = let
+      s = ../.;
+    in
+      fs.toSource {
+        root = s;
+        fileset = fs.unions [
+          (fs.fileFilter (file: builtins.any file.hasExt ["rs"]) s + /src)
+          lockfile
+          cargoToml
+        ];
+      };
+
+    postInstall = ''
+      mkdir -p $out/share
+      install -Dm755 ${../contrib} $out/share/contrib
+    '';
+
+    cargoLock.lockFile = lockfile;
+
+    meta = {
+      description = "Sophisticated HTTP tarpit and honeypot stream";
+      mainProgram = "eris";
+    };
+  }

nix/shell.nix

@@ -0,0 +1,28 @@
+{
+  mkShell,
+  rust-analyzer,
+  rustfmt,
+  clippy,
+  cargo,
+  gcc,
+  openssl,
+  pkg-config,
+  rustc,
+}:
+mkShell {
+  name = "eris";
+  packages = [
+    rust-analyzer
+    rustfmt
+    clippy
+    cargo
+    gcc
+    clippy
+    rustfmt
+    rustc
+
+    # For TLS and friends
+    openssl
+    pkg-config
+  ];
+}