bulk rename to flupdt, add CLI, add README, add .gitignore

Signed-off-by: ahuston-0 <aliceghuston@gmail.com>

flupdt/flake_show.py

@@ -0,0 +1,34 @@
+#!/usr/bin/env python3
+
+import json
+from flupdt.common import bash_wrapper
+import shutil
+
+
+def traverse_json_base(json_dict: dict, path: list[str]):
+    final_paths = []
+    for key, value in json_dict.items():
+        if isinstance(value, dict):
+            keys = value.keys()
+            if "type" in keys and value["type"] in [
+                "nixos-configuration",
+                "derivation",
+            ]:
+                final_paths += [".".join(path + [key])]
+            else:
+                final_paths += traverse_json_base(value, path + [key])
+    return final_paths
+
+
+def traverse_json(json_dict: dict):
+    return traverse_json_base(json_dict, [])
+
+
+def get_derivations(path_to_flake: str):
+    nix_path = shutil.which("nix")
+    flake_show = bash_wrapper(f"{nix_path} flake show --json", path=path_to_flake)
+    if flake_show[1] != 0:
+        raise RuntimeError("flake show returned non-zero exit code")
+    flake_show_json = json.loads(flake_show[0])
+    derivations = traverse_json(flake_show_json)
+    return derivations