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#ifndef GITFS_GIT_H
#define GITFS_GIT_H
#include <memory>
#include <git2.h>
#include <ostream>
namespace GitFS {
namespace Git {
struct Error {
int err;
int klass;
const char * message;
};
void throwError(int err);
template<typename ... P, typename ... A>
void
gitSafe(int (*func)(P...), A ... p)
{
if (int _giterror = func(p...); _giterror != 0) {
throwError(_giterror);
}
}
template<typename T>
using TPtr = std::shared_ptr<T>;
template<typename R, typename ... P, typename ... A>
auto
gitSafeGet(int(*get)(R**, P...), void(*release)(R*), A ... p)
{
R * r = nullptr;
gitSafe(get, &r, p...);
return TPtr<R>(r, release);
}
template<typename R, typename ... P, typename ... A>
auto
gitSafeGet(int(*get)(R**, P...), A ... p)
{
R * r = nullptr;
gitSafe(get, &r, p...);
return r;
}
inline auto OidParse(const std::string_view & str)
{
git_oid oid;
gitSafe(git_oid_fromstrn, &oid, str.data(), str.length());
return oid;
}
inline auto RepositoryOpenBare(const std::string & path)
{
return gitSafeGet(git_repository_open_bare, git_repository_free, path.c_str());
}
using RepositoryPtr = decltype(RepositoryOpenBare(""));
inline auto BlobLookup(const RepositoryPtr & repo, const git_oid & blob)
{
return gitSafeGet(git_blob_lookup, git_blob_free, repo.get(), &blob);
}
using BlobPtr = decltype(BlobLookup({}, {}));
inline auto CommitLookup(const RepositoryPtr & repo, const git_oid & commitId)
{
return gitSafeGet(git_commit_lookup, git_commit_free, repo.get(), &commitId);
}
using CommitPtr = decltype(CommitLookup({}, {}));
inline auto TreeLookup(const RepositoryPtr & repo, const git_oid & treeId)
{
return gitSafeGet(git_tree_lookup, git_tree_free, repo.get(), &treeId);
}
using TreePtr = decltype(TreeLookup({}, {}));
inline auto TreeEntryByPath(const TreePtr & tree, const std::string & path)
{
return gitSafeGet(git_tree_entry_bypath, git_tree_entry_free, tree.get(), path.c_str() + 1);
}
using TreeEntryPtr = decltype(TreeEntryByPath({}, {}));
}
}
namespace std {
std::ostream & operator<<(std::ostream &, const git_oid &);
}
#endif
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