chore: add bumpversion

flake.lock

@@ -217,6 +217,23 @@
         "type": "github"
       }
     },
+    "nix-devtools": {
+      "locked": {
+        "dir": "lib",
+        "lastModified": 1739971859,
+        "narHash": "sha256-DaY11jX7Lraw7mRUIsgPsO+aSkkewQe2D+WMZORTNPE=",
+        "owner": "technofab",
+        "repo": "nix-devtools",
+        "rev": "b4f059657de5ac2569afd69a8f042614d309e6bb",
+        "type": "gitlab"
+      },
+      "original": {
+        "dir": "lib",
+        "owner": "technofab",
+        "repo": "nix-devtools",
+        "type": "gitlab"
+      }
+    },
     "nix-mkdocs": {
       "locked": {
         "dir": "lib",
@@ -352,6 +369,7 @@
         "devenv": "devenv",
         "flake-parts": "flake-parts_2",
         "mkdocs-material-umami": "mkdocs-material-umami",
+        "nix-devtools": "nix-devtools",
         "nix-mkdocs": "nix-mkdocs",
         "nixpkgs": "nixpkgs_4",
         "nixtest": "nixtest",

flake.nix

@@ -8,6 +8,7 @@
       imports = [
         inputs.devenv.flakeModule
         inputs.treefmt-nix.flakeModule
+        inputs.nix-devtools.flakeModule
         inputs.nix-mkdocs.flakeModule
         inputs.nixtest.flakeModule
         ./lib/flakeModule.nix
@@ -52,6 +53,18 @@
               };
             };
           };
+
+          bumpversion = {
+            enable = true;
+            current_version = "2.0.1";
+            commit = true;
+            tag = true;
+            message = "bump: {current_version} → {new_version}";
+            file = {
+              "flake.nix".formats = [''current_version = "{version}";''];
+              "lib/VERSION".formats = ["{version}"];
+            };
+          };
         };
         doc = {
           path = ./docs;
@@ -283,6 +296,7 @@
     systems.url = "github:nix-systems/default-linux";
     devenv.url = "github:cachix/devenv";
     treefmt-nix.url = "github:numtide/treefmt-nix";
+    nix-devtools.url = "gitlab:technofab/nix-devtools?dir=lib";
     nix-mkdocs.url = "gitlab:technofab/nixmkdocs?dir=lib";
     mkdocs-material-umami.url = "gitlab:technofab/mkdocs-material-umami";
     nixtest.url = "gitlab:technofab/nixtest/1.0.0?dir=lib";

lib/VERSION

@@ -0,0 +1 @@
+2.0.1