nix: init tooling

.envrc

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+use flake
+

flake.lock

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+{
+  "nodes": {
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1745930157,
+        "narHash": "sha256-y3h3NLnzRSiUkYpnfvnS669zWZLoqqI6NprtLQ+5dck=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "46e634be05ce9dc6d4db8e664515ba10b78151ae",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

flake.nix

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+{
+  inputs.nixpkgs.url = "github:NixOS/nixpkgs?ref=nixos-unstable";
+
+  outputs = {
+    self,
+    nixpkgs,
+  }: let
+    systems = ["x86_64-linux"];
+    forEachSystem = nixpkgs.lib.genAttrs systems;
+    pkgsForEach = nixpkgs.legacyPackages;
+  in {
+    packages = forEachSystem (system: {
+      eris = pkgsForEach.${system}.callPackage ./nix/package.nix {};
+      default = self.packages.${system}.eris;
+    });
+
+    devShells = forEachSystem (system: {
+      default = pkgsForEach.${system}.callPackage ./nix/shell.nix {};
+    });
+  };
+}

nix/package.nix

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+{
+  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

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+{
+  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
+  ];
+}