fixed TypeError due to different attributes over directories and files

Signed-off-by: Pratik Dey <pratikrocks.dey11@gmail.com>

Author: pratik0316

src/commoncode/resource.py

@@ -1593,8 +1593,12 @@ def _populate(self, scan_data):
 
         # We collect the first Resource so we can see what attributes it has and determine
         # the root path from its path
-        sample_resource_data = resources_data[0]
-
+        
+        sample_resource_data = dict()
+        
+        for resource in resources_data:
+            sample_resource_data.update(resource)
+        
         # Collect the existing attributes of the standard Resource class
         standard_res_attributes = set(f.name for f in attr.fields(Resource))
         # add these properties since they are fields but are serialized

tests/data/resource/virtual_codebase/fingerprint_attribute.json

@@ -0,0 +1,97 @@
+{
+    "scancode_notice": "Generated with ScanCode and provided on an \"AS IS\" BASIS, WITHOUT WARRANTIES\nOR CONDITIONS OF ANY KIND, either express or implied. No content created from\nScanCode should be considered or used as legal advice. Consult an Attorney\nfor any legal advice.\nScanCode is a free software code scanning tool from nexB Inc. and others.\nVisit https://github.com/nexB/scancode-toolkit/ for support and download.",
+    "scancode_version": "2.9.0b1.post32.fea65d35a",
+    "scancode_options": {
+      "input": "C:\\code\\nexb\\dev\\codebase01\\licenses\\apache_to_all_notable_lic\\apache_to_all_notable_lic_new",
+      "--copyright": true,
+      "--info": true,
+      "--json-pp": "C:\\code\\nexb\\dev\\deltacode\\tests\\data\\deltacode\\apache_to_all_notable_lic_new.json",
+      "--license": true,
+      "--package": true
+    },
+    "files_count": 2,
+    "files": [
+      {
+        "path": "apache_to_all_notable_lic_new",
+        "type": "directory",
+        "name": "apache_to_all_notable_lic_new",
+        "base_name": "apache_to_all_notable_lic_new",
+        "extension": "",
+        "size": 0,
+        "date": null,
+        "sha1": null,
+        "md5": null,
+        "mime_type": null,
+        "file_type": null,
+        "programming_language": null,
+        "is_binary": false,
+        "is_text": false,
+        "is_archive": false,
+        "is_media": false,
+        "is_source": false,
+        "is_script": false,
+        "licenses": [],
+        "copyrights": [],
+        "packages": [],
+        "files_count": 2,
+        "dirs_count": 0,
+        "size_count": 16471,
+        "scan_errors": []
+      },
+      {
+        "path": "apache_to_all_notable_lic_new/a1.py",
+        "type": "file",
+        "name": "a1.py",
+        "base_name": "a1",
+        "extension": ".py",
+        "size": 16271,
+        "date": "2018-03-16",
+        "sha1": "535b9966048ad50a9d5eb2f167c0a3013ee5cc6f",
+        "md5": "e5658fe520bbebaf6f3d4be2e2525ab6",
+        "fingerprint": "e30cf09443e7878dfed3288886e97542",
+        "mime_type": "text/plain",
+        "file_type": "UTF-8 Unicode text, with very long lines, with CRLF line terminators",
+        "programming_language": "Python",
+        "is_binary": false,
+        "is_text": true,
+        "is_archive": false,
+        "is_media": false,
+        "is_source": true,
+        "is_script": false,
+        "licenses": [],
+        "copyrights": [],
+        "packages": [],
+        "files_count": 0,
+        "dirs_count": 0,
+        "size_count": 0,
+        "scan_errors": []
+      },
+      {
+        "path": "apache_to_all_notable_lic_new/a2.py",
+        "type": "file",
+        "name": "a2.py",
+        "base_name": "a2",
+        "extension": ".py",
+        "size": 200,
+        "date": "2017-09-26",
+        "sha1": "310797523e47db8481aeb06f1634317285115091",
+        "md5": "19efdad483f68bc9997a5c1f7ba41b26",
+        "mime_type": "text/plain",
+        "file_type": "ASCII text, with CRLF line terminators",
+        "programming_language": "Python",
+        "is_binary": false,
+        "is_text": true,
+        "is_archive": false,
+        "is_media": false,
+        "is_source": true,
+        "is_script": false,
+        "licenses": [],
+        "copyrights": [],
+        "packages": [],
+        "files_count": 0,
+        "dirs_count": 0,
+        "size_count": 0,
+        "scan_errors": []
+      }
+    ]
+  }

tests/test_resource.py

@@ -1055,6 +1055,14 @@ def test_virtual_codebase_can_process_minimal_resources_with_only_path(self):
             ])
         ]
         assert [r.to_dict() for r in codebase.walk()] == expected
+        
+    def test_VirtualCodebase_account_fingerprint_attribute(self):
+        test_file = self.get_test_loc("resource/virtual_codebase/fingerprint_attribute.json")
+        codebase = VirtualCodebase(test_file)
+        resources_fingerprint = [resource.fingerprint for resource in codebase.walk()]
+        assert "e30cf09443e7878dfed3288886e97542" in resources_fingerprint
+        assert None in resources_fingerprint
+        assert resources_fingerprint.count(None) == 2
 
 
 class TestCodebaseLowestCommonParent(FileBasedTesting):