Create ssh based remote path

Question

How should be set the url to add a ssh based remote path to an initialized repository? I have tried with

git_remote_create(&remote, repo, "origin", "ssh://[email protected]/libgit2/TestGitRepository");

but it does not fetch correctly and git_remote_stats returns 0 received objects. If ssh is replaced with https, git_fetch works as expected. The same url works well with git_clone(see comment):

git_clone(&repo, "ssh://[email protected]/libgit2/TestGitRepository", "foo", &clone_opts);

I have also tried to set ssh://[email protected]:libgit2/TestGitRepository, but it does not work either.

Answer 1

The problem was caused because I was not using the credential callback.

From the callback section in the libgit2 documentation:

For a credentials example, check out the fetch example, which uses an interactive credential callback. See also the built-in credential helpers.

Below a minimal example to init+fetch+checkout a repo using ssh:

#include <git2.h>
#include <string.h>

int credentials_cb(git_credential **out, const char *url, const char *username_from_url,
    unsigned int allowed_types, void *payload)
{
  int err;
  char *username = NULL, *password = NULL, *privkey = NULL, *pubkey = NULL;
  username = strdup("git");
  password = strdup("PASSWORD");
  pubkey = strdup("/home/user/.ssh/id_rsa.pub");
  privkey = strdup("/home/user/.ssh/id_rsa");

  err = git_credential_ssh_key_new(out, username, pubkey, privkey, password);

  free(username);
  free(password);
  free(privkey);
  free(pubkey);

  return err;
}

int main(void)
{

  git_repository *repo;

  git_libgit2_init();

  git_repository_init(&repo, "libgit2-test-ssh/", 0);

  git_remote *remote;
  git_remote_create(
      &remote, repo, "origin",
      "ssh://[email protected]/libgit2/TestGitRepository");

  git_fetch_options fetch_opts = GIT_FETCH_OPTIONS_INIT;
  fetch_opts.callbacks.credentials = credentials_cb;
  git_remote_fetch(remote, NULL, &fetch_opts, NULL);

  git_object *branch;
  git_revparse_single(&branch, repo, "remotes/origin/master");
  git_checkout_options checkout_opts = GIT_CHECKOUT_OPTIONS_INIT;
  git_checkout_tree(repo, branch, &checkout_opts);

  git_object_free(branch);
  git_remote_free(remote);

  git_repository_free(repo);
  git_libgit2_shutdown();

  return 0;
}