Unline git helpers and throw NetFS exceptions

1 files changed, 50 insertions, 12 deletions

diff --git a/src/git.cpp b/src/git.cpp
index 850b8b3..045d146 100644
--- a/src/git.cpp
+++ b/src/git.cpp
@@ -6,25 +6,63 @@
 
 namespace GitFS {
 	namespace Git {
+		template<>
+		[[noreturn]]
 		void
-		throwError(int err)
+		throwError<NetFS::SystemError>(int err)
 		{
-#if LIBGIT2_VER_MINOR >= 28
-			const git_error * e = git_error_last();
-#else
-			const git_error * e = giterr_last();
-#endif
-			throw Error { err, e->klass, e->message };
+			switch (err) {
+				case GIT_ENOTFOUND:
+					throw NetFS::SystemError(ENOENT);
+				default:
+					throw NetFS::SystemError(EIO);
+			}
 		}
 
-		[[noreturn]] void ErrorToSystemError(const Error & e)
+		template<>
+		[[noreturn]]
+		void
+		throwError<NetFS::ConfigError>(int)
 		{
-			if (e.err == GIT_ENOTFOUND) {
-				throw NetFS::SystemError(ENOENT);
-			}
-			throw NetFS::SystemError(EIO);
+			throw NetFS::ConfigError();
+		}
+
+		git_oid OidParse(const std::string_view & str)
+		{
+			git_oid oid;
+			gitSafe<NetFS::ConfigError>(git_oid_fromstrn, &oid, str.data(), str.length());
+			return oid;
+		}
+
+		RepositoryPtr RepositoryOpenBare(const std::string & path)
+		{
+			return gitSafeGet<NetFS::ConfigError>(
+					git_repository_open_bare, git_repository_free, path.c_str());
+		}
+
+		BlobPtr BlobLookup(const RepositoryPtr & repo, const git_oid & blob)
+		{
+			return gitSafeGet<NetFS::SystemError>(
+					git_blob_lookup, git_blob_free, repo.get(), &blob);
+		}
+
+		CommitPtr CommitLookup(const RepositoryPtr & repo, const git_oid & commitId)
+		{
+			return gitSafeGet<NetFS::ConfigError>(
+					git_commit_lookup, git_commit_free, repo.get(), &commitId);
 		}
 
+		TreePtr TreeLookup(const RepositoryPtr & repo, const git_oid & treeId)
+		{
+			return gitSafeGet<NetFS::SystemError>(
+					git_tree_lookup, git_tree_free, repo.get(), &treeId);
+		}
+
+		TreeEntryPtr TreeEntryByPath(const TreePtr & tree, const std::string & path)
+		{
+			return gitSafeGet<NetFS::SystemError>(
+					git_tree_entry_bypath, git_tree_entry_free, tree.get(), path.c_str() + 1);
+		}
 	}
 }