Test fetch behavior

Signed-off-by: Václav Valíček <valicek1994@gmail.com>

repo_cloner/lib/repo_tool.py

@@ -138,7 +138,13 @@ class RepoTool:
 			return False
 
 		log.info(f"Cloning repository from url: {url}")
-		self._repo = Repo.clone_from(url, to_path = self._path, progress = GitRemoteProgress(), bare = True)
+		self._repo = Repo.clone_from(
+			url,
+			to_path = self._path,
+			progress = GitRemoteProgress(),
+			bare = True,
+			mirror = True
+		)
 		self._initialized = True
 		self._bare = self._repo.bare
 
@@ -154,10 +160,24 @@ class RepoTool:
 		remote = self._repo.remotes[0]
 		log.debug(f"Fetching remote: {remote.name} url: {next(remote.urls)}")
 		self._last_fetch_data = remote.fetch(
-			"+refs/heads/*:refs/heads/*",
+			["+refs/heads/*:refs/heads/*", "+refs/tags/*:refs/tags/*"],
 			progress = GitRemoteProgress(),
 			kill_after_timeout = 60,
 			prune = True
 		)
 		log.debug("Fetch finished!")
 		return True
+
+	@__check_initialized
+	def repo_fingerprint(self) -> Union[str, bool]:
+		log.debug("Getting repo fingerprint")
+		# reference count
+		ref_count = self._repo.git.rev_list(count = True, all = True)
+		tags = [f"{tag.name}/{tag.commit}" for tag in self._repo.tags]
+		branches = [f"{branch.name}/{branch.commit}" for branch in self._repo.branches]
+		log.debug(f"{ref_count} references, {len(tags)} tags,  {len(branches)} branches")
+		cumulative = f"{ref_count} {'.'.join(tags)} {' '.join(branches)}".encode()
+		import hashlib
+		x = hashlib.sha256(cumulative).hexdigest()
+		log.debug(f"Repo fingerprint is {x}")
+		return x