如何在libgit2中打印差异文件

how to print diff files in libgit2?

本文关键字：文件 打印 libgit2      更新时间：2023-10-16

我尝试了此

string path = "path/to/my/repo";
git_libgit2_init();
const char * REPO_PATH = path.c_str();
git_repository * repo = nullptr;
git_repository_open(&repo, REPO_PATH);
git_diff_options diffopts = GIT_DIFF_OPTIONS_INIT;
git_diff *diff;
diffopts.flags = GIT_CHECKOUT_NOTIFY_CONFLICT;
git_diff_index_to_workdir(&diff, repo, NULL, &diffopts);
git_diff_format_t format = GIT_DIFF_FORMAT_NAME_ONLY;
if (0!=git_diff_print(diff, format, NULL,NULL)) cerr << "git_diff_print() failed" << endl;
git_diff_free(diff);
git_repository_free(repo);
git_libgit2_shutdown();

但我不知道要发送什么作为第三和第四参数来函数git_diff_print((，一些想法？

在libgit2 api中，此函数的声明

git_diff_print(git_diff *diff, git_diff_format_t format, git_diff_line_cb print_cb, void *payload);

，但我不知道最后两个参数以及如何将它们发送到此功能

尝试此示例时：

https://libgit2.github.com/libgit2/ex/head/head/diff.html#git_diff_diff_print-9

，它对我不起作用

最后，我以另一种方式获得了信息，有我的解决方案：

git_libgit2_init();
const char * REPO_PATH = path.c_str();
git_repository * repo = nullptr;
git_repository_open(&repo, REPO_PATH);
git_diff_options diffopts = GIT_DIFF_OPTIONS_INIT;
git_diff *diff;
diffopts.flags = GIT_CHECKOUT_NOTIFY_CONFLICT;
git_diff_index_to_workdir(&diff, repo, NULL, &diffopts);
size_t num_deltas = git_diff_num_deltas(diff);
if (num_deltas != 0){
    const git_diff_delta *delta = git_diff_get_delta(diff, 0);
    int i = 0;
    cerr << "Your local changes to the following files would be overwritten by checkout : " << endl;
    while (i<num_deltas) {
        delta = git_diff_get_delta(diff, i);
        git_diff_file file = delta->new_file;
        cerr << "t" << file.path << endl;
        i++;
    }
    cerr << "Please commit your changes before you switch branches. " << endl;
}
else cout << "All files OK, can checkout now" << endl;
git_diff_free(diff);
git_repository_free(repo);
git_libgit2_shutdown();
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