update: use only 7 chars of SHA256 for non-APK version name

#460

fdroidserver/update.py

@@ -993,7 +993,7 @@ def scan_repo_files(apkcache, repodir, knownapks, use_date_from_file=False):
             repo_file['hash'] = shasum
             repo_file['hashType'] = 'sha256'
             repo_file['versionCode'] = 0
-            repo_file['versionName'] = shasum
+            repo_file['versionName'] = shasum[0:7]
             # the static ID is the SHA256 unless it is set in the metadata
             repo_file['packageName'] = shasum
 

tests/repo/index-v1.json

@@ -349,7 +349,7 @@
         "packageName": "fake.ota.update",
         "size": 233,
         "versionCode": 1234,
-        "versionName": "897a92a4ccff4f415f6ba275b2af16d4ecaee60a983b215bddcb9f8964e7a24c"
+        "versionName": "897a92a"
       }
     ],
     "info.guardianproject.urzip": [

tests/repo/index.xml

@@ -57,7 +57,7 @@
 		<marketversion>0.2.1</marketversion>
 		<marketvercode>2000</marketvercode>
 		<package>
-			<version>897a92a4ccff4f415f6ba275b2af16d4ecaee60a983b215bddcb9f8964e7a24c</version>
+			<version>897a92a</version>
 			<versioncode>1234</versioncode>
 			<apkname>fake.ota.update_1234.zip</apkname>
 			<hash type="sha256">897a92a4ccff4f415f6ba275b2af16d4ecaee60a983b215bddcb9f8964e7a24c</hash>