git tree viewer

To view a Git tree in C, you can use the libgit2 library. Libgit2 is a portable, pure C implementation of Git that provides an API for interacting with Git repositories. Here's an example of how you can use libgit2 to view a Git tree:

1. First, make sure you have libgit2 installed on your system. You can download the library from the official libgit2 website (https://libgit2.org/).

2. Include the necessary headers in your C code:

#include <git2.h>

1. Initialize the libgit2 library:

git_libgit2_init();

1. Open the Git repository:

git_repository* repo = NULL;
int error = git_repository_open(&repo, "/path/to/repository");
if (error < 0) {
    // Handle error
}

Replace "/path/to/repository" with the actual path to your Git repository.

1. Get the tree from the repository:

git_oid tree_id;
git_repository_head(&tree_id, repo);
git_commit* commit = NULL;
git_commit_lookup(&commit, repo, &tree_id);
const git_tree* tree = NULL;
git_commit_tree(&tree, commit);

1. Traverse the tree and print its contents:

git_tree_walk(tree, GIT_TREEWALK_PRE, print_tree_entry, NULL);

Here's an example of a callback function print_tree_entry that can be used to print the tree entries:

int print_tree_entry(const char root, const git_tree_entry entry, void* payload) {
    printf("Entry: %s\n", git_tree_entry_name(entry));
    return 0;
}

1. Finally, free the allocated memory and cleanup:

git_commit_free(commit);
git_repository_free(repo);
git_libgit2_shutdown();

This is a basic example of how you can use libgit2 to view a Git tree in C. You can explore more functions provided by the libgit2 library to perform various operations on the Git repository. Remember to handle errors appropriately and check the return values of functions for any potential issues.