add option to sign on import..

If the identity changed, generate a new uuid, and set created_by and
modified appropriately...

ui/fixtures/cmd.import.json

@@ -0,0 +1,22 @@
+[
+{
+	"title": "gen ident",
+	"cmd": [ "genident", "name=A Test User" ],
+	"exit": 0
+},
+{
+	"title": "that a sign import can be done",
+	"cmd": [ "import", "--sign" ],
+	"stdin": "{\"created_by_ref\": \"2de7a389-410c-4755-8c62-f3254c7e971e\", \"dir\": \"\", \"filename\": \"FreeBSD-14.0-CURRENT-arm64-aarch64-ROCK64-20220331-d53927b0bae-254105.img.xz\", \"hashes\": [\"sha512:3eba2aa09a79fd7adec32ace93c6725e75b91a55192b5bfa827b893fae1c2cdbc040e282138387797f245c1f27da5e8ff7a02f59ff75c73b3d999d1e0a8752ad\"], \"id\": \"d9e8fc1a-9794-5e70-b67b-11d708ec8947\", \"modified\": \"2022-08-02T07:52:50.216428Z\", \"mtime\": \"2022-03-31T10:15:14.000000Z\", \"sig\": \"F3Ch1BQB57RAgFNKNF5btCRZS3jFmafhvcdoWuu6WHo5JzyhuQ7jNvZkv4tzgWqlMfPecLJMMmSAMcwqorykDWi854ZfKUm3F-JOTk8R7qRKdHd23rwVGDEXtVHv-kynkh8WemPsfc2V1HT8JKG9NhwA\", \"size\": 551750948, \"type\": \"file\", \"uuid\": \"89544934-6ed9-46ca-b8d0-77c5209f798d\"}\n"
+},
+{
+	"special": "verify store object cnt",
+	"comment": "and the objects were imported",
+	"count": 1
+},
+{
+	"title": "that the created_by_ref was changed",
+	"cmd": [ "dump" ],
+	"stdout_nre": "2de7a389-410c-4755-8c62-f3254c7e971|2022-08-02T07:52:50.216428Z|F3Ch1BQB57RAgFNKNF5btCRZS3jFmafhvcdoWuu6WHo5JzyhuQ7jNvZkv4tzgWqlMfPecLJMMmSAMcwqorykDWi854ZfKUm3F-JOTk8R7qRKdHd23rwVGDEXtVHv-kynkh8WemPsfc2V1HT8JKG9NhwA|89544934-6ed9-46ca-b8d0-77c5209f798d"
+}
+]

ui/medashare/cli.py

@@ -975,8 +975,21 @@ def cmd_import(options):
 		inp = inp.strip()
 		jobj, endpos = jd.raw_decode(inp)
 
+		if options.sign:
+			cbr = _makeuuid(jobj['created_by_ref'])
+			if cbr != persona.uuid:
+				# new owner
+				jobj['created_by_ref'] = persona.uuid
+
+				# drop old parts
+				jobj.pop('uuid', None)
+				jobj.pop('modified', None)
+
 		obj = MDBase.create_obj(jobj)
 
+		if options.sign:
+			obj = persona.sign(obj)
+
 		objstr.loadobj(obj)
 
 		inp = inp[endpos:]
@@ -1042,6 +1055,8 @@ def main():
 	parser_dump.set_defaults(func=cmd_dump)
 
 	parser_import = subparsers.add_parser('import', help='import objects encoded as json')
+	parser_import.add_argument('--sign', action='store_true',
+	    help='import as new identity, and sign objects (if created_by_ref is different, new uuid is created)')
 	parser_import.set_defaults(func=cmd_import)
 
 	parser_drop = subparsers.add_parser('drop', help='drop the object specified by UUID')
@@ -1590,8 +1605,11 @@ class _TestCases(unittest.TestCase):
 
 				# with the correct output
 				self.maxDiff = None
+				outnre = cmd.get('stdout_nre')
 				outre = cmd.get('stdout_re')
-				if outre:
+				if outnre:
+					self.assertNotRegex(stdout.getvalue(), outnre)
+				elif outre:
 					self.assertRegex(stdout.getvalue(), outre)
 				else:
 					self.assertEqual(stdout.getvalue(), cmd.get('stdout', ''))