如何在libgit2中编写"git commit"代码？

Question

我搜索了Google和Stackoverflow,以获得如何在libgit2(https://libgit2.github.com)和C或C++中编写相当于git commit -a -m"message"的问题的答案.但我找不到这个问题的准备和工作答案.我使用的是libgit2-0.21.

下面是初始化git存储库,向其添加两个文件,并对这两个文件进行分级以便准备提交的代码.

我的问题是如何在libgit2中编写"git commit -a -m"msg"？

#include <sys/stat.h>
#include <string>
#include <fstream>
#include <iostream>
#include <git2.h>
using namespace std;


int main (int argc, char** argv)
{
  git_threads_init ();

  // Create repository directory.
  string directory = "repository";
  mkdir (directory.c_str(), 0777);

  // Initialize the repository: git init.
  git_repository *repo = NULL;
  int result = git_repository_init (&repo, directory.c_str(), false);
  if (result != 0) cerr << giterr_last ()->message << endl;

  // Store two files in the repository directory.
  ofstream file;
  file.open ("repository/file1", ios::binary | ios::trunc);
  file << "Contents of file one";
  file.close ();

  file.open ("repository/file2", ios::binary | ios::trunc);
  file << "Contents of file two";
  file.close ();

  // Run the equivalent of "git add ."

  // Get the git index.
  git_index * index = NULL;
  result = git_repository_index (&index, repo);
  if (result != 0) cerr << giterr_last ()->message << endl;

  // Add all files to the git index.
  result = git_index_add_all (index, NULL, 0, NULL, NULL);
  if (result != 0) cerr << giterr_last ()->message << endl;

  // Write the index to disk.
  result = git_index_write (index);
  if (result != 0) cerr << giterr_last ()->message << endl;

  // Run the equivalent of "git commit -a -m "commit message".

  // How to do that through libgit2?


  // Run "git status" to see the result.
  system ("cd repository; git status");

  // Free resources.
  git_index_free (index);
  git_repository_free (repo);
  git_threads_shutdown ();

  return 0;
}

代码可以编译如下:

g++ -Wall -I/opt/local/include -L/opt/local/lib -lgit2 -o test git.cpp

下面是运行已编译二进制文件的输出:

On branch master

Initial commit

Changes to be committed:
  (use "git rm --cached <file>..." to unstage)

    new file:   file1
    new file:   file2

Answer 1

索引更新后

• 从中创建一棵树 git_index_write_tree()
• 创建一个引用此树的提交 git_commit_create_v()

请参见此结束测试,该测试执行以下等效操作

 $ echo "test" > test.txt
 $ git add .
 $ git commit -m "Initial commit"