Add --version flag to cli

.gitignore

@@ -9,3 +9,5 @@ test.db
 .ruff_cache
 
 *.qcow2
+
+dibbler/_version.py

dibbler/main.py

@@ -1,4 +1,5 @@
 import argparse
+import sys
 from pathlib import Path
 
 from sqlalchemy import create_engine
@@ -17,10 +18,17 @@ parser.add_argument(
     required=False,
 )
 
+parser.add_argument(
+    "-V",
+    "--version",
+    help="Show program version",
+    action="store_true",
+    default=False,
+)
+
 subparsers = parser.add_subparsers(
     title="subcommands",
     dest="subcommand",
-    required=True,
 )
 subparsers.add_parser("loop", help="Run the dibbler loop")
 subparsers.add_parser("create-db", help="Create the database")
@@ -31,6 +39,15 @@ subparsers.add_parser("seed-data", help="Fill with mock data")
 def main() -> None:
     args = parser.parse_args()
 
+    if args.version:
+        from ._version import commit_id, version
+        print(f"Dibbler version {version}, commit {commit_id if commit_id else '<unknown>'}")
+        return
+
+    if not args.subcommand:
+        parser.print_help()
+        sys.exit(1)
+
     load_config(args.config)
 
     engine = create_engine(config_db_string())

flake.nix

@@ -66,6 +66,7 @@
         default = self.packages.${system}.dibbler;
         dibbler = pkgs.callPackage ./nix/package.nix {
           python3Packages = pkgs.python313Packages;
+          inherit (self) sourceInfo;
         };
       });
     };

nix/package.nix

@@ -1,4 +1,5 @@
 { lib
+, sourceInfo
 , python3Packages
 , makeWrapper
 , less
@@ -8,7 +9,7 @@ let
 in
 python3Packages.buildPythonApplication {
   pname = pyproject.project.name;
-  version = pyproject.project.version;
+  version = "0.1";
   src = lib.cleanSource ../.;
 
   format = "pyproject";
@@ -17,9 +18,16 @@ python3Packages.buildPythonApplication {
   # https://github.com/NixOS/nixpkgs/issues/285234
   # dontCheckRuntimeDeps = true;
 
+  env.SETUPTOOLS_SCM_PRETEND_METADATA = (x: "{${x}}") (lib.concatStringsSep ", " [
+    "node=\"${sourceInfo.rev or (lib.substring 0 64 sourceInfo.dirtyRev)}\""
+    "node_date=${lib.substring 0 4 sourceInfo.lastModifiedDate}-${lib.substring 4 2 sourceInfo.lastModifiedDate}-${lib.substring 6 2 sourceInfo.lastModifiedDate}"
+    "dirty=${if sourceInfo ? dirtyRev then "true" else "false"}"
+  ]);
+
   nativeBuildInputs = with python3Packages; [
-    setuptools
     makeWrapper
+    setuptools
+    setuptools-scm
   ];
   propagatedBuildInputs = with python3Packages; [
     # brother-ql

pyproject.toml

@@ -1,10 +1,13 @@
 [build-system]
-requires = ["setuptools"]
 build-backend = "setuptools.build_meta"
+requires = [
+  "setuptools",
+  "setuptools-scm",
+]
 
 [project]
 name = "dibbler"
-version = "1.0.0"
+dynamic = ["version"]
 authors = [
   { name = "Programvareverkstedet", email = "projects@pvv.ntnu.no" }
 ]
@@ -21,12 +24,13 @@ dependencies = [
     "psycopg2-binary >= 2.8, <2.10",
     # "python-barcode",
 ]
+scripts.dibbler = "dibbler.main:main"
 
 [tool.setuptools.packages.find]
 include = ["dibbler*"]
 
-[project.scripts]
-dibbler = "dibbler.main:main"
+[tool.setuptools_scm]
+version_file = "dibbler/_version.py"
 
 [tool.black]
 line-length = 100

uv.lock

@@ -4,7 +4,6 @@ requires-python = ">=3.11"
 
 [[package]]
 name = "dibbler"
-version = "1.0.0"
 source = { editable = "." }
 dependencies = [
     { name = "psycopg2-binary" },