add reset subcommand

QuantStack · ianthomas23 · Jul 31, 2025 · Jul 29, 2025 · Jul 29, 2025 · Jul 30, 2025
commit 4dbb90d56a89f02c560a9cc09f40fd04eb39cde0
diff --git a/CMakeLists.txt b/CMakeLists.txt
@@ -51,6 +51,8 @@ set(GIT2CPP_SRC
     ${GIT2CPP_SOURCE_DIR}/subcommand/commit_subcommand.hpp
     ${GIT2CPP_SOURCE_DIR}/subcommand/init_subcommand.cpp
     ${GIT2CPP_SOURCE_DIR}/subcommand/init_subcommand.hpp
+    ${GIT2CPP_SOURCE_DIR}/subcommand/reset_subcommand.cpp
+    ${GIT2CPP_SOURCE_DIR}/subcommand/reset_subcommand.hpp
     ${GIT2CPP_SOURCE_DIR}/subcommand/status_subcommand.cpp
     ${GIT2CPP_SOURCE_DIR}/subcommand/status_subcommand.hpp
     ${GIT2CPP_SOURCE_DIR}/utils/common.cpp

diff --git a/src/main.cpp b/src/main.cpp
@@ -8,7 +8,9 @@
 #include "subcommand/branch_subcommand.hpp"
 #include "subcommand/checkout_subcommand.hpp"
 #include "subcommand/clone_subcommand.hpp"
+#include "subcommand/commit_subcommand.hpp"
 #include "subcommand/init_subcommand.hpp"
+#include "subcommand/reset_subcommand.hpp"
 #include "subcommand/status_subcommand.hpp"
 
 int main(int argc, char** argv)
@@ -29,6 +31,8 @@ int main(int argc, char** argv)
         branch_subcommand branch(lg2_obj, app);
         checkout_subcommand checkout(lg2_obj, app);
         clone_subcommand clone(lg2_obj, app);
+        commit_subcommand commit(lg2_obj, app);
+        reset_subcommand reset(lg2_obj, app);
 
         app.require_subcommand(/* min */ 0, /* max */ 1);
 

diff --git a/src/subcommand/commit_subcommand.cpp b/src/subcommand/commit_subcommand.cpp
@@ -27,10 +27,8 @@ void commit_subcommand::run()
 
     if (!m_message_flag)
     {
-        std::cout << "Please provide a message using the -m flag." << std::endl;
-    }
-    else
-    {
-        repo.create_commit(author_committer_signatures, m_message);
+        throw std::runtime_error("Please provide a message using the -m flag.");
     }
+
+    repo.create_commit(author_committer_signatures, m_message);
 }
diff --git a/src/subcommand/reset_subcommand.cpp b/src/subcommand/reset_subcommand.cpp
@@ -0,0 +1,61 @@
+#include "reset_subcommand.hpp"
+// #include "../wrapper/index_wrapper.hpp"
+#include "../wrapper/repository_wrapper.hpp"
+#include <stdexcept>
+
+enum class reset_type
+{
+    GIT_RESET_SOFT = 1,
+    GIT_RESET_MIXED = 2,
+    GIT_RESET_HARD = 3
+};
+
+reset_subcommand::reset_subcommand(const libgit2_object&, CLI::App& app)
+{
+    auto *sub = app.add_subcommand("reset", "Reset current HEAD to the specified state");
+
+    sub->add_option("<commit>", m_commit, "The ID of the commit that will become HEAD");
+
+    sub->add_flag("--soft", m_soft_flag, "");
+    sub->add_flag("--mixed", m_mixed_flag, "");
+    sub->add_flag("--hard", m_hard_flag, "");
+
+    sub->callback([this]() { this->run(); });
+};
+
+
+void reset_subcommand::run()
+{
+    auto directory = get_current_git_path();
+    auto bare = false;
+    auto repo = repository_wrapper::init(directory, bare);
+
+    auto target = repo.revparse_single(m_commit);
+    if (!target)
+    {
+        throw std::runtime_error("Target revision not found.");
+    }
+
+    git_checkout_options options;
+    git_checkout_options_init(&options, GIT_CHECKOUT_OPTIONS_VERSION);
+
+    git_reset_t reset_type;
+    if (m_soft_flag)
+    {
+        reset_type = GIT_RESET_SOFT;
+    }
+    if (m_mixed_flag)
+    {
+        reset_type = GIT_RESET_MIXED;
+    }
+    if (m_hard_flag)
+    {
+        reset_type = GIT_RESET_HARD;
+        if (m_commit.empty())
+        {
+            m_commit = "HEAD";
+        }
+    }
+
+    repo.reset(target.value(), reset_type, options);
+}
diff --git a/src/subcommand/reset_subcommand.hpp b/src/subcommand/reset_subcommand.hpp
@@ -0,0 +1,19 @@
+#pragma once
+
+#include <CLI/CLI.hpp>
+
+#include "../utils/common.hpp"
+
+class reset_subcommand
+{
+public:
+
+    explicit reset_subcommand(const libgit2_object&, CLI::App& app);
+    void run();
+
+private:
+    std::string m_commit;
+    bool m_soft_flag = false;
+    bool m_mixed_flag = false;
+    bool m_hard_flag = false;
+};
diff --git a/src/wrapper/repository_wrapper.cpp b/src/wrapper/repository_wrapper.cpp
@@ -1,4 +1,5 @@
 #include "../utils/git_exception.hpp"
+#include "object_wrapper.hpp"
 #include "../wrapper/repository_wrapper.hpp"
 
 repository_wrapper::~repository_wrapper()
@@ -149,3 +150,8 @@ void repository_wrapper::set_head_detached(const annotated_commit_wrapper& commi
 {
     throw_if_error(git_repository_set_head_detached_from_annotated(*this, commit));
 }
+
+void repository_wrapper::reset(const object_wrapper& target, git_reset_t reset_type, const git_checkout_options& checkout_options)
+{
+    throw_if_error(git_reset(*this, target, reset_type, &checkout_options));
+}
diff --git a/src/wrapper/repository_wrapper.hpp b/src/wrapper/repository_wrapper.hpp
@@ -62,9 +62,10 @@ class repository_wrapper : public wrapper_base<git_repository>
     // Objects
     std::optional<object_wrapper> revparse_single(std::string_view spec) const;
 
-    // Set head
+    // Head manipulations
     void set_head(std::string_view ref_name);
     void set_head_detached(const annotated_commit_wrapper& commit);
+    void reset(const object_wrapper& target, git_reset_t reset_type, const git_checkout_options& checkout_options);
 
 private:
 

diff --git a/test/test_commit.py b/test/test_commit.py
@@ -18,7 +18,7 @@ def test_add(git2cpp_path, all_flag):
     assert "Changes to be committed" in p_status.stdout
     assert "new file" in p_status.stdout
 
-    cmd_commit = [git2cpp_path, 'commit', "-m", "test commit"]
+    cmd_commit = [git2cpp_path, 'commit', "--soft", "-m", "test commit"]
     subprocess.run(cmd_commit, capture_output=True, text=True)
 
     cmd_status_2 = [git2cpp_path, 'status', "--long"]