create clan: better info about existing sop keys

When creating a new clan, the key selection now looks like this:
```
Found existing admin keys on this machine:
1: type: AGE
   pubkey: age1xyz...
   source: /home/grmpf/.config/sops/age/keys.txt
2: type: PGP
   pubkey: abc...
   source: SOPS_PGP_FP
Select keys to use (comma-separated list of numbers, or leave empty to select all):
```

This is achieved by adding a `source` attribute to `SopsKey`.

pkgs/clan-cli/clan_cli/secrets/key.py

@@ -31,7 +31,9 @@ def generate_key() -> sops.SopsKey:
     print(
         f"Generated age private key at '{path}' for your user.\nPlease back it up on a secure location or you will lose access to your secrets."
     )
-    return sops.SopsKey(pub_key, username="", key_type=sops.KeyType.AGE)
+    return sops.SopsKey(
+        pub_key, username="", key_type=sops.KeyType.AGE, source=str(path)
+    )
 
 
 def generate_command(args: argparse.Namespace) -> None:

pkgs/clan-cli/clan_cli/secrets/machines.py

@@ -26,7 +26,11 @@ from .types import public_or_private_age_key_type, secret_name_type
 
 def add_machine(flake_dir: Path, name: str, pubkey: str, force: bool) -> None:
     machine_path = sops_machines_folder(flake_dir) / name
-    write_key(machine_path, sops.SopsKey(pubkey, "", sops.KeyType.AGE), overwrite=force)
+    write_key(
+        machine_path,
+        sops.SopsKey(pubkey, "", sops.KeyType.AGE, source=str(machine_path)),
+        overwrite=force,
+    )
     paths = [machine_path]
 
     filter_machine_secrets = get_secrets_filter_for_machine(flake_dir, name)

pkgs/clan-cli/clan_cli/secrets/sops.py

@@ -30,6 +30,9 @@ class KeyType(enum.Enum):
     AGE = enum.auto()
     PGP = enum.auto()
 
+    def __str__(self) -> str:
+        return self.name
+
     @classmethod
     def validate(cls, value: str | None) -> "KeyType | None":
         if value:
@@ -49,7 +52,7 @@ class KeyType(enum.Enum):
         )
         raise ClanError(msg)
 
-    def collect_public_keys(self) -> list[str]:
+    def collect_public_keys(self) -> list["SopsKey"]:
         keyring = []
 
         if self == self.AGE:
@@ -66,7 +69,14 @@ class KeyType(enum.Enum):
                                 f"in {key_path}: {public_key}"
                             )
 
-                            keyring.append(public_key)
+                            keyring.append(
+                                SopsKey(
+                                    pubkey=public_key,
+                                    username="",
+                                    key_type=self,
+                                    source=str(key_path),
+                                )
+                            )
                     except ClanError as e:
                         error_msg = f"Failed to read age keys from {key_path}"
                         raise ClanError(error_msg) from e
@@ -89,7 +99,14 @@ class KeyType(enum.Enum):
                             f"in the environment (SOPS_AGE_KEY): {public_key}"
                         )
 
-                        keyring.append(public_key)
+                        keyring.append(
+                            SopsKey(
+                                pubkey=public_key,
+                                username="",
+                                key_type=self,
+                                source="SOPS_AGE_KEY",
+                            )
+                        )
                 except ClanError as e:
                     error_msg = "Failed to read age keys from SOPS_AGE_KEY"
                     raise ClanError(error_msg) from e
@@ -107,7 +124,11 @@ class KeyType(enum.Enum):
                 for fp in pgp_fingerprints.strip().split(","):
                     msg = f"Found PGP public key in the environment (SOPS_PGP_FP): {fp}"
                     log.debug(msg)
-                    keyring.append(fp)
+                    keyring.append(
+                        SopsKey(
+                            pubkey=fp, username="", key_type=self, source="SOPS_PGP_FP"
+                        )
+                    )
             return keyring
 
         msg = f"KeyType {self.name.lower()} is missing an implementation for collect_public_keys"
@@ -121,14 +142,19 @@ class SopsKey:
     # if they don't have the same username:
     username: str = dataclasses.field(compare=False)
     key_type: KeyType
+    source: str = dataclasses.field(compare=False)
 
     def as_dict(self) -> dict[str, str]:
         return {
             "publickey": self.pubkey,
             "username": self.username,
             "type": self.key_type.name.lower(),
+            "source": self.source,
         }
 
+    def __str__(self) -> str:
+        return f"({self.key_type.name}) {self.pubkey} (source: {self.source})"
+
     @classmethod
     def load_dir(cls, folder: Path) -> set["SopsKey"]:
         """Load from the file named `keys.json` in the given directory."""
@@ -136,11 +162,10 @@ class SopsKey:
 
     @classmethod
     def collect_public_keys(cls) -> list["SopsKey"]:
-        return [
+        result = []
-            cls(pubkey=key, username="", key_type=key_type)
+        for key_type in KeyType:
-            for key_type in KeyType
+            result.extend(key_type.collect_public_keys())
-            for key in key_type.collect_public_keys()
+        return result
-        ]
 
 
 class ExitStatus(enum.IntEnum):  # see: cmd/sops/codes/codes.go
@@ -384,7 +409,8 @@ def maybe_get_user(flake_dir: Path, keys: set[SopsKey]) -> set[SopsKey] | None:
             user_keys = read_keys(user)
             if len(keys.intersection(user_keys)):
                 return {
-                    SopsKey(key.pubkey, user.name, key.key_type) for key in user_keys
+                    SopsKey(key.pubkey, user.name, key.key_type, key.source)
+                    for key in user_keys
                 }
 
     return None
@@ -538,6 +564,7 @@ def get_recipients(secret_path: Path) -> set[SopsKey]:
                     pubkey=recipient[key_type.sops_recipient_attr],
                     username="",
                     key_type=key_type,
+                    source="sops_file",
                 )
             )
     return keys
@@ -623,7 +650,7 @@ def parse_key(key: Any) -> SopsKey:
     if not publickey:
         msg = f"{key} does not contain a public key"
         raise ClanError(msg)
-    return SopsKey(publickey, "", key_type)
+    return SopsKey(publickey, "", key_type, "key_file")
 
 
 def read_key(path: Path) -> SopsKey:

pkgs/clan-cli/clan_cli/secrets/users.py

@@ -78,7 +78,9 @@ def remove_user(flake_dir: Path, name: str) -> None:
 
 def get_user(flake_dir: Path, name: str) -> set[sops.SopsKey]:
     keys = read_keys(sops_users_folder(flake_dir) / name)
-    return {sops.SopsKey(key.pubkey, name, key.key_type) for key in keys}
+    return {
+        sops.SopsKey(key.pubkey, name, key.key_type, source=key.source) for key in keys
+    }
 
 
 def list_users(flake_dir: Path) -> list[str]:
@@ -182,11 +184,17 @@ def _key_args(args: argparse.Namespace) -> Iterable[sops.SopsKey]:
         )
         raise ClanError(err_msg)
 
-    age_keys = [sops.SopsKey(key, "", sops.KeyType.AGE) for key in age_keys]
+    age_keys = [
+        sops.SopsKey(key, "", sops.KeyType.AGE, source="cmdline") for key in age_keys
+    ]
     if args.agekey:
-        age_keys.append(sops.SopsKey(args.agekey, "", sops.KeyType.AGE))
+        age_keys.append(
+            sops.SopsKey(args.agekey, "", sops.KeyType.AGE, source="cmdline")
+        )
 
-    pgp_keys = [sops.SopsKey(key, "", sops.KeyType.PGP) for key in pgp_keys]
+    pgp_keys = [
+        sops.SopsKey(key, "", sops.KeyType.PGP, source="cmdline") for key in pgp_keys
+    ]
 
     return age_keys + pgp_keys
 

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

@@ -50,7 +50,9 @@ def _select_keys_interactive(pub_keys: list[SopsKey]) -> list[SopsKey]:
     log.info("\nFound existing admin keys on this machine:")
     selected_keys: list[SopsKey] = []
     for i, key in enumerate(pub_keys):
-        log.info(f"{i + 1}: {key}")
+        log.info(
+            f"{i + 1}: type: {key.key_type}\n   pubkey: {key.pubkey}\n   source: {key.source}"
+        )
     while not selected_keys:
         choice = input(
             "Select keys to use (comma-separated list of numbers, or leave empty to select all): "