feat: add templates

template/rust/devshell/default.nix

@@ -0,0 +1,14 @@
+{ pkgs }: let
+ dev-help = pkgs.writeShellScriptBin "dev-help" /* sh */ ''
+   printf '%s\n' \
+   'phph'
+ '';
+ rustToolchain = pkgs.pkgsBuildHost.rust-bin.stable."1.87.0".default;
+in
+pkgs.mkShell {
+  buildInputs = [ dev-help ];
+  nativeBuildInputs = [ rustToolchain pkgs.pkg-config ];
+
+  # environment
+  PAGER="${pkgs.hectic.nvim-pager}/bin/pager";
+}

template/rust/flake.lock

@@ -0,0 +1,109 @@
+{
+  "nodes": {
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1754292888,
+        "narHash": "sha256-1ziydHSiDuSnaiPzCQh1mRFBsM2d2yRX9I+5OPGEmIE=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "ce01daebf8489ba97bd1609d185ea276efdeb121",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixos-25.05",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "nixpkgs-unstable": {
+      "locked": {
+        "lastModified": 1739451785,
+        "narHash": "sha256-3ebRdThRic9bHMuNi2IAA/ek9b32bsy8F5R4SvGTIog=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "1128e89fd5e11bb25aedbfc287733c6502202ea9",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixpkgs-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "nixpkgs": "nixpkgs",
+        "rust-overlay": "rust-overlay",
+        "util": "util"
+      }
+    },
+    "rust-overlay": {
+      "inputs": {
+        "nixpkgs": [
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1754362243,
+        "narHash": "sha256-QHNTUdI6oIYuuazGuKGhVk5RCOM1nIzDUc/AGgL7Szw=",
+        "owner": "oxalica",
+        "repo": "rust-overlay",
+        "rev": "3ec3244ffb877f1b7f5d2dbff19241982ab25ff2",
+        "type": "github"
+      },
+      "original": {
+        "owner": "oxalica",
+        "repo": "rust-overlay",
+        "type": "github"
+      }
+    },
+    "rust-overlay_2": {
+      "inputs": {
+        "nixpkgs": [
+          "util",
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1738290352,
+        "narHash": "sha256-YKOHUmc0Clm4tMV8grnxYL4IIwtjTayoq/3nqk0QM7k=",
+        "owner": "oxalica",
+        "repo": "rust-overlay",
+        "rev": "b031b584125d33d23a0182f91ddbaf3ab4880236",
+        "type": "github"
+      },
+      "original": {
+        "owner": "oxalica",
+        "repo": "rust-overlay",
+        "type": "github"
+      }
+    },
+    "util": {
+      "inputs": {
+        "nixpkgs": [
+          "nixpkgs"
+        ],
+        "nixpkgs-unstable": "nixpkgs-unstable",
+        "rust-overlay": "rust-overlay_2"
+      },
+      "locked": {
+        "lastModified": 1751301064,
+        "narHash": "sha256-/fYo5Emc7Ahvdx2u2o+6lyQxe+ECP0808q4gI5tfAGA=",
+        "owner": "hectic-lab",
+        "repo": "util.nix",
+        "rev": "5e112f5df8b977c64fa026ff1bc31a47eb48ec02",
+        "type": "github"
+      },
+      "original": {
+        "owner": "hectic-lab",
+        "ref": "fix/postgres-extension",
+        "repo": "util.nix",
+        "type": "github"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

template/rust/flake.nix

@@ -0,0 +1,34 @@
+{
+  description = "";
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-25.05";
+    rust-overlay = {
+      url = "github:oxalica/rust-overlay";
+      inputs = {
+        nixpkgs.follows = "nixpkgs";
+      };
+    };
+    util = {
+      url = "github:hectic-lab/util.nix?ref=fix/postgres-extension";
+      inputs = {
+        nixpkgs.follows = "nixpkgs";
+      };
+    };
+  };
+
+  outputs = { self, nixpkgs, rust-overlay, util }:
+  let
+    overlays = [ (import rust-overlay) util.overlays.default ];
+  in
+  util.lib.forAllSystemsWithPkgs overlays ({ system, pkgs }:
+    let
+      lib = pkgs.lib;
+    in
+    {
+      ### DEV SHELL ###
+      devShells.${system} = {
+	default = import ./devshell/default.nix { inherit pkgs; };
+      };
+    }
+  );
+}