clan-cli: Fix clan flakes create inside an already existing git repo

pkgs/clan-cli/clan_cli/clan/create.py

@@ -9,7 +9,7 @@ from clan_cli.cmd import CmdOut, RunOpts, run
 from clan_cli.errors import ClanError
 from clan_cli.flake import Flake
 from clan_cli.inventory import Inventory, init_inventory
-from clan_cli.nix import nix_shell
+from clan_cli.nix import nix_metadata, nix_shell
 from clan_cli.templates import (
     InputPrio,
     TemplateName,
@@ -48,6 +48,13 @@ def git_command(directory: Path, *args: str) -> list[str]:
 def create_clan(opts: CreateOptions) -> CreateClanResponse:
     dest = opts.dest.resolve()
 
+    try:
+        nix_metadata(str(opts.src_flake))
+    except ClanError:
+        log.error(f"Found a repository, but it is not a valid flake: {opts.src_flake}")
+        log.warning("Setting src_flake to None")
+        opts.src_flake = None
+
     template = get_template(
         TemplateName(opts.template_name),
         "clan",

pkgs/clan-cli/tests/test_create_flake.py

@@ -3,6 +3,7 @@ import subprocess
 from pathlib import Path
 
 import pytest
+from clan_cli.cmd import run
 from fixtures_flakes import substitute
 from helpers import cli
 from stdout import CaptureOutput
@@ -53,6 +54,53 @@ def test_create_flake(
         pytest.fail("nixosConfigurations.machine1 not found in flake outputs")
 
 
+@pytest.mark.impure
+def test_create_flake_existing_git(
+    monkeypatch: pytest.MonkeyPatch,
+    temporary_home: Path,
+    clan_core: Path,
+    capture_output: CaptureOutput,
+) -> None:
+    flake_dir = temporary_home / "test-flake"
+
+    run(["git", "init", str(temporary_home)])
+
+    cli.run(["flakes", "create", str(flake_dir), "--template=default"])
+
+    assert (flake_dir / ".clan-flake").exists()
+    # Replace the inputs.clan.url in the template flake.nix
+    substitute(
+        flake_dir / "flake.nix",
+        clan_core,
+    )
+    # Dont evaluate the inventory before the substitute call
+
+    monkeypatch.chdir(flake_dir)
+    cli.run(["machines", "create", "machine1"])
+
+    # create a hardware-configuration.nix that doesn't throw an eval error
+
+    for patch_machine in ["jon", "sara"]:
+        (
+            flake_dir / "machines" / f"{patch_machine}/hardware-configuration.nix"
+        ).write_text("{}")
+
+    with capture_output as output:
+        cli.run(["machines", "list"])
+    assert "machine1" in output.out
+    flake_show = subprocess.run(
+        ["nix", "flake", "show", "--json"],
+        check=True,
+        capture_output=True,
+        text=True,
+    )
+    flake_outputs = json.loads(flake_show.stdout)
+    try:
+        flake_outputs["nixosConfigurations"]["machine1"]
+    except KeyError:
+        pytest.fail("nixosConfigurations.machine1 not found in flake outputs")
+
+
 @pytest.mark.impure
 def test_ui_template(
     monkeypatch: pytest.MonkeyPatch,