vars: fix regenerating a specific generator

This was broken after re-designing the API -> added a test

pkgs/clan-app/ui/src/workflows/Install/steps/installSteps.tsx

@@ -550,7 +550,13 @@ const InstallSummary = () => {
       return;
     }
 
+    // Extract generator names from prompt values
+    // TODO: This is wrong. We need to extend run_generators to be able to compute
+    //       a sane closure over a list of provided generators.
+    const generators = Object.keys(store.install.promptValues || {});
+
     const runGenerators = client.fetch("run_generators", {
+      generators: generators.length > 0 ? generators : undefined,
       prompt_values: store.install.promptValues,
       machines: [
         {

pkgs/clan-cli/clan_cli/tests/test_vars.py

@@ -119,6 +119,28 @@ def test_generate_public_and_secret_vars(
     monkeypatch: pytest.MonkeyPatch,
     flake_with_sops: ClanFlake,
 ) -> None:
+    """Test generation of public and secret vars with dependencies.
+
+    Generator dependency graph:
+
+    my_generator (standalone)
+        ├── my_value (public)
+        ├── my_secret (secret)
+        └── value_with_default (public, has default)
+
+    my_shared_generator (shared=True)
+        └── my_shared_value (public)
+                ↓
+    dependent_generator (depends on my_shared_generator)
+        └── my_secret (secret, copies from my_shared_value)
+
+    This test verifies:
+    - Public and secret vars are stored correctly
+    - Shared generators work across dependencies
+    - Default values are handled properly
+    - Regeneration with --regenerate updates all values
+    - Regeneration with --regenerate --generator only updates specified generator
+    """
     flake = flake_with_sops
 
     config = flake.machines["my_machine"]
@@ -126,14 +148,13 @@ def test_generate_public_and_secret_vars(
     my_generator = config["clan"]["core"]["vars"]["generators"]["my_generator"]
     my_generator["files"]["my_value"]["secret"] = False
     my_generator["files"]["my_secret"]["secret"] = True
-    my_generator["script"] = (
-        'echo -n public$RANDOM > "$out"/my_value; echo -n secret$RANDOM > "$out"/my_secret; echo -n non-default$RANDOM > "$out"/value_with_default'
-    )
-
     my_generator["files"]["value_with_default"]["secret"] = False
     my_generator["files"]["value_with_default"]["value"]["_type"] = "override"
     my_generator["files"]["value_with_default"]["value"]["priority"] = 1000  # mkDefault
     my_generator["files"]["value_with_default"]["value"]["content"] = "default_value"
+    my_generator["script"] = (
+        'echo -n public$RANDOM > "$out"/my_value; echo -n secret$RANDOM > "$out"/my_secret; echo -n non-default$RANDOM > "$out"/value_with_default'
+    )
 
     my_shared_generator = config["clan"]["core"]["vars"]["generators"][
         "my_shared_generator"
@@ -257,6 +278,44 @@ def test_generate_public_and_secret_vars(
     assert shared_value != shared_value_new, (
         "Shared value should change after regeneration"
     )
+    # test that after regenerating a shared generator, it and its dependents are regenerated
+    cli.run(
+        [
+            "vars",
+            "generate",
+            "--flake",
+            str(flake.path),
+            "my_machine",
+            "--regenerate",
+            "--no-sandbox",
+            "--generator",
+            "my_shared_generator",
+        ]
+    )
+    # test that the shared generator is regenerated
+    shared_value_after_regeneration = get_machine_var(
+        machine, "my_shared_generator/my_shared_value"
+    ).printable_value
+    assert shared_value_after_regeneration != shared_value_new, (
+        "Shared value should change after regenerating my_shared_generator"
+    )
+    # test that the dependent generator is also regenerated (because it depends on my_shared_generator)
+    secret_value_after_regeneration = sops_store.get(
+        dependent_generator, "my_secret"
+    ).decode()
+    assert secret_value_after_regeneration != secret_value_new, (
+        "Dependent generator's secret should change after regenerating my_shared_generator"
+    )
+    assert secret_value_after_regeneration == shared_value_after_regeneration, (
+        "Dependent generator's secret should match the new shared value"
+    )
+    # test that my_generator is NOT regenerated (it doesn't depend on my_shared_generator)
+    public_value_after_regeneration = get_machine_var(
+        machine, "my_generator/my_value"
+    ).printable_value
+    assert public_value_after_regeneration == public_value_new, (
+        "my_generator value should NOT change after regenerating only my_shared_generator"
+    )
 
 
 # TODO: it doesn't actually test if the group has access

pkgs/clan-cli/clan_cli/vars/generate.py

@@ -37,11 +37,8 @@ def generate_command(args: argparse.Namespace) -> None:
 
     run_generators(
         machines,
-        generators=args.generator
+        generators=args.generator,
-        if args.generator
+        full_closure=args.regenerate if args.regenerate is not None else False,
-        else "all"
-        if args.regenerate
-        else "minimal",
         no_sandbox=args.no_sandbox,
     )
 

pkgs/clan-cli/clan_cli/vms/run.py

@@ -383,7 +383,7 @@ def run_command(
     machine_obj: Machine = Machine(args.machine, args.flake)
 
     generate_facts([machine_obj])
-    run_generators([machine_obj])
+    run_generators([machine_obj], generators=None, full_closure=False)
 
     vm: VmConfig = inspect_vm(machine=machine_obj)
 

pkgs/clan-cli/clan_lib/flash/flash.py

@@ -78,7 +78,7 @@ def run_machine_flash(
         system_config_nix: dict[str, Any] = {}
 
         generate_facts([machine])
-        run_generators([machine])
+        run_generators([machine], generators=None, full_closure=False)
 
         if system_config.language:
             if system_config.language not in list_languages():

pkgs/clan-cli/clan_lib/machines/install.py

@@ -88,7 +88,7 @@ def run_machine_install(opts: InstallOptions, target_host: Remote) -> None:
     # Notify the UI about what we are doing
     notify_install_step("generators")
     generate_facts([machine])
-    run_generators([machine])
+    run_generators([machine], generators=None, full_closure=False)
 
     with (
         TemporaryDirectory(prefix="nixos-install-") as _base_directory,

pkgs/clan-cli/clan_lib/machines/morph.py

@@ -78,7 +78,7 @@ def morph_machine(
 
         machine = Machine(name=name, flake=Flake(str(flakedir)))
 
-        run_generators([machine], generators="minimal")
+        run_generators([machine], generators=None, full_closure=False)
 
         machine.secret_vars_store.populate_dir(
             machine.name,

pkgs/clan-cli/clan_lib/machines/update.py

@@ -148,7 +148,7 @@ def run_machine_update(
         target_host_root = stack.enter_context(_target_host.become_root())
 
         generate_facts([machine], service=None, regenerate=False)
-        run_generators([machine], generators="minimal")
+        run_generators([machine], generators=None, full_closure=False)
 
         # Upload secrets to the target host using root
         upload_secrets(machine, target_host_root)

pkgs/clan-cli/clan_lib/vars/generate.py

@@ -97,7 +97,8 @@ strategies (e.g., interactive CLI, GUI, or programmatic).
 @API.register
 def run_generators(
     machines: list[Machine],
-    generators: str | list[str] = "minimal",
+    generators: str | list[str] | None = None,
+    full_closure: bool = False,
     prompt_values: dict[str, dict[str, str]] | PromptFunc = lambda g: g.ask_prompts(),
     no_sandbox: bool = False,
 ) -> None:
@@ -105,12 +106,13 @@ def run_generators(
     Args:
         machines: The machines to run generators for.
         generators: Can be:
-            - str: Single generator name to run (ensuring dependencies are met)
+            - None: Run all generators (with closure based on full_closure parameter)
+            - str: Single generator name to run (with closure based on full_closure parameter)
             - list[str]: Specific generator names to run exactly as provided.
                 Dependency generators are not added automatically in this case.
                 The caller must ensure that all dependencies are included.
-            - "all": Run all generators (full closure)
+        full_closure: Whether to include all dependencies (True) or only missing ones (False).
-            - "minimal": Run only missing generators (minimal closure) (default)
+            Only used when generators is None or a string.
         prompt_values: A dictionary mapping generator names to their prompt values,
             or a function that returns prompt values for a generator.
         no_sandbox: Whether to disable sandboxing when executing the generator.
@@ -119,16 +121,8 @@ def run_generators(
         executing the generator.
     """
     for machine in machines:
-        if generators == "all":
+        if isinstance(generators, list):
-            generator_objects = get_generators(machine, full_closure=True)
+            # List of generator names - use them exactly as provided
-        elif generators == "minimal":
-            generator_objects = get_generators(machine, full_closure=False)
-        elif isinstance(generators, str) and generators not in ["all", "minimal"]:
-            # Single generator name - compute minimal closure for it
-            generator_objects = get_generators(
-                machine, full_closure=False, generator_name=generators
-            )
-        elif isinstance(generators, list):
             if len(generators) == 0:
                 return
             # Create GeneratorKeys for this specific machine
@@ -138,8 +132,10 @@ def run_generators(
             all_generators = get_generators(machine, full_closure=True)
             generator_objects = [g for g in all_generators if g.key in generator_keys]
         else:
-            msg = f"Invalid generators argument: {generators}. Must be 'all', 'minimal', a generator name, or a list of generator names"
+            # None or single string - use get_generators with closure parameter
-            raise ValueError(msg)
+            generator_objects = get_generators(
+                machine, full_closure=full_closure, generator_name=generators
+            )
 
         # If prompt function provided, ask all prompts
         # TODO: make this more lazy and ask for every generator on execution