Add revwalk wrapper

QuantStack · JohanMabille · Jan 6, 2026 · Dec 26, 2025 · Jan 6, 2026 · Jan 6, 2026
commit 70ee6b976fb4ad8d17d1ab0a2ee02ce4ce4fcb89
diff --git a/CMakeLists.txt b/CMakeLists.txt
@@ -98,6 +98,8 @@ set(GIT2CPP_SRC
     ${GIT2CPP_SOURCE_DIR}/wrapper/remote_wrapper.hpp
     ${GIT2CPP_SOURCE_DIR}/wrapper/repository_wrapper.cpp
     ${GIT2CPP_SOURCE_DIR}/wrapper/repository_wrapper.hpp
+    ${GIT2CPP_SOURCE_DIR}/wrapper/revwalk_wrapper.cpp
+    ${GIT2CPP_SOURCE_DIR}/wrapper/revwalk_wrapper.hpp
     ${GIT2CPP_SOURCE_DIR}/wrapper/signature_wrapper.cpp
     ${GIT2CPP_SOURCE_DIR}/wrapper/signature_wrapper.hpp
     ${GIT2CPP_SOURCE_DIR}/wrapper/status_wrapper.cpp

diff --git a/src/subcommand/log_subcommand.cpp b/src/subcommand/log_subcommand.cpp
@@ -87,22 +87,19 @@ void log_subcommand::run()
     auto repo = repository_wrapper::open(directory);
     // auto branch_name = repo.head().short_name();
 
-    git_revwalk* walker;
-    git_revwalk_new(&walker, repo);
-    git_revwalk_push_head(walker);
+    revwalk_wrapper walker = repo.new_walker();
+    walker.push_head();
 
     terminal_pager pager;
 
     std::size_t i=0;
     git_oid commit_oid;
-    while (!git_revwalk_next(&commit_oid, walker) && i<m_max_count_flag)
+    while (!walker.next(commit_oid) && i<m_max_count_flag)
     {
         commit_wrapper commit = repo.find_commit(commit_oid);
         print_commit(commit, m_format_flag);
         ++i;
     }
 
-    git_revwalk_free(walker);
-
     pager.show();
 }
diff --git a/src/subcommand/revlist_subcommand.cpp b/src/subcommand/revlist_subcommand.cpp
@@ -1,7 +1,6 @@
 #include "revlist_subcommand.hpp"
 #include "../wrapper/repository_wrapper.hpp"
-// #include <ios>
-// #include <stdexcept>
+#include "../wrapper/revwalk_wrapper.hpp"
 
 revlist_subcommand::revlist_subcommand(const libgit2_object&, CLI::App& app)
 {
@@ -30,20 +29,17 @@ void revlist_subcommand::run()
         start_commit_oid = start_commit.oid();
     }
 
-    git_revwalk* walker;
-    git_revwalk_new(&walker, repo);
-    git_revwalk_push_head(walker);
+    revwalk_wrapper walker = repo.new_walker();
+    walker.push(start_commit_oid);
 
     std::size_t i=0;
     git_oid commit_oid;
     char buf[GIT_OID_SHA1_HEXSIZE + 1];
-    while (!git_revwalk_next(&commit_oid, walker) && i<m_max_count_flag)
+    while (!walker.next(commit_oid) && i<m_max_count_flag)
     {
         git_oid_fmt(buf, &commit_oid);
 		buf[GIT_OID_SHA1_HEXSIZE] = '\0';
 		std::cout << buf << std::endl;
 		++i;
     }
-
-    git_revwalk_free(walker);
 }
diff --git a/src/wrapper/repository_wrapper.cpp b/src/wrapper/repository_wrapper.cpp
@@ -1,12 +1,5 @@
 #include <iostream>
 
-#include "../utils/git_exception.hpp"
-#include "../wrapper/index_wrapper.hpp"
-#include "../wrapper/object_wrapper.hpp"
-#include "../wrapper/commit_wrapper.hpp"
-#include "../wrapper/remote_wrapper.hpp"
-#include <git2/repository.h>
-#include <git2/remote.h>
 #include "../wrapper/repository_wrapper.hpp"
 
 repository_wrapper::~repository_wrapper()
@@ -56,6 +49,13 @@ bool repository_wrapper::is_shallow() const
     return git_repository_is_shallow(*this);
 }
 
+revwalk_wrapper repository_wrapper::new_walker()
+{
+    git_revwalk* walker;
+    throw_if_error(git_revwalk_new(&walker, *this));
+    return revwalk_wrapper(walker);
+}
+
 // Head
 
 bool repository_wrapper::is_head_unborn() const

diff --git a/src/wrapper/repository_wrapper.hpp b/src/wrapper/repository_wrapper.hpp
@@ -14,6 +14,7 @@
 #include "../wrapper/object_wrapper.hpp"
 #include "../wrapper/refs_wrapper.hpp"
 #include "../wrapper/remote_wrapper.hpp"
+#include "../wrapper/revwalk_wrapper.hpp"
 #include "../wrapper/signature_wrapper.hpp"
 #include "../wrapper/wrapper_base.hpp"
 
@@ -36,6 +37,8 @@ class repository_wrapper : public wrapper_base<git_repository>
     bool is_bare() const;
     bool is_shallow() const;
 
+    revwalk_wrapper new_walker();
+
     // Head
     bool is_head_unborn() const;
     reference_wrapper head() const;

diff --git a/src/wrapper/revwalk_wrapper.cpp b/src/wrapper/revwalk_wrapper.cpp
@@ -0,0 +1,31 @@
+#include <git2/index.h>
+#include <git2/types.h>
+
+#include "revwalk_wrapper.hpp"
+#include "../utils/git_exception.hpp"
+
+revwalk_wrapper::revwalk_wrapper(git_revwalk* walker)
+    : base_type(walker)
+{
+}
+
+revwalk_wrapper::~revwalk_wrapper()
+{
+    git_revwalk_free(p_resource);
+    p_resource=nullptr;
+}
+
+void revwalk_wrapper::push_head()
+{
+    throw_if_error(git_revwalk_push_head(*this));
+}
+
+void revwalk_wrapper::push(git_oid& commit_oid)
+{
+    throw_if_error(git_revwalk_push(*this, &commit_oid));
+}
+
+int revwalk_wrapper::next(git_oid& commit_oid)
+{
+    return git_revwalk_next(&commit_oid, *this);
+}
diff --git a/src/wrapper/revwalk_wrapper.hpp b/src/wrapper/revwalk_wrapper.hpp
@@ -0,0 +1,29 @@
+#pragma once
+
+#include <git2.h>
+#include <git2/types.h>
+
+#include "../wrapper/wrapper_base.hpp"
+#include "../wrapper/commit_wrapper.hpp"
+
+class revwalk_wrapper : public wrapper_base<git_revwalk>
+{
+public:
+
+    using base_type = wrapper_base<git_revwalk>;
+
+    ~revwalk_wrapper();
+
+    revwalk_wrapper(revwalk_wrapper&&) noexcept = default;
+    revwalk_wrapper& operator=(revwalk_wrapper&&) noexcept = default;
+
+    void push_head();
+    void push(git_oid& commit_oid);
+    int next(git_oid& commit_oid);
+
+private:
+
+    revwalk_wrapper(git_revwalk* walker);
+
+    friend class repository_wrapper;
+};
diff --git a/test/test_revlist.py b/test/test_revlist.py
@@ -12,8 +12,9 @@ def test_revlist(xtl_clone, git_config, git2cpp_path, tmp_path, monkeypatch):
         "rev-list",
         "35955995424eb9699bb604b988b5270253b1fccc",
         "--max-count",
-        "4",
+        "2",
     ]
     p = subprocess.run(cmd, capture_output=True, cwd=xtl_path, text=True)
     assert p.returncode == 0
     assert "da1754dd6" in p.stdout
+    assert "2da8e13ef" not in p.stdout