static int update_head_to_branch( git_repository *repo, const char *remote_name, const char *branch) { int retcode; git_buf remote_branch_name = GIT_BUF_INIT; git_reference* remote_ref = NULL; assert(remote_name && branch); if ((retcode = git_buf_printf(&remote_branch_name, GIT_REFS_REMOTES_DIR "%s/%s", remote_name, branch)) < 0 ) goto cleanup; if ((retcode = git_reference_lookup(&remote_ref, repo, git_buf_cstr(&remote_branch_name))) < 0) goto cleanup; retcode = update_head_to_new_branch(repo, git_reference_target(remote_ref), branch); cleanup: git_reference_free(remote_ref); git_buf_free(&remote_branch_name); return retcode; }
static int update_head_to_remote( git_repository *repo, git_remote *remote, const git_signature *signature, const char *reflog_message) { int error = 0, found_branch = 0; size_t refs_len; git_refspec dummy_spec, *refspec; const git_remote_head *remote_head, **refs; const git_oid *remote_head_id; git_buf remote_master_name = GIT_BUF_INIT; git_buf branch = GIT_BUF_INIT; if ((error = git_remote_ls(&refs, &refs_len, remote)) < 0) return error; /* Did we just clone an empty repository? */ if (refs_len == 0) return setup_tracking_config( repo, "master", GIT_REMOTE_ORIGIN, GIT_REFS_HEADS_MASTER_FILE); error = git_remote_default_branch(&branch, remote); if (error == GIT_ENOTFOUND) { git_buf_puts(&branch, GIT_REFS_HEADS_MASTER_FILE); } else { found_branch = 1; } /* Get the remote's HEAD. This is always the first ref in the list. */ remote_head = refs[0]; assert(remote_head); remote_head_id = &remote_head->oid; refspec = git_remote__matching_refspec(remote, git_buf_cstr(&branch)); if (refspec == NULL) { memset(&dummy_spec, 0, sizeof(git_refspec)); refspec = &dummy_spec; } /* Determine the remote tracking reference name from the local master */ if ((error = git_refspec_transform( &remote_master_name, refspec, git_buf_cstr(&branch))) < 0) return error; if (found_branch) { error = update_head_to_new_branch( repo, remote_head_id, git_buf_cstr(&branch), signature, reflog_message); } else { error = git_repository_set_head_detached( repo, remote_head_id, signature, reflog_message); } git_buf_free(&remote_master_name); git_buf_free(&branch); return error; }
static int update_head_to_remote(git_repository *repo, git_remote *remote) { int retcode = -1; git_refspec dummy_spec; git_remote_head *remote_head; struct head_info head_info; git_buf remote_master_name = GIT_BUF_INIT; /* Did we just clone an empty repository? */ if (remote->refs.length == 0) { return setup_tracking_config( repo, "master", GIT_REMOTE_ORIGIN, GIT_REFS_HEADS_MASTER_FILE); } /* Get the remote's HEAD. This is always the first ref in remote->refs. */ remote_head = NULL; if (!remote->transport->ls(remote->transport, get_head_callback, &remote_head)) return -1; assert(remote_head); git_oid_cpy(&head_info.remote_head_oid, &remote_head->oid); git_buf_init(&head_info.branchname, 16); head_info.repo = repo; head_info.refspec = git_remote__matching_refspec(remote, GIT_REFS_HEADS_MASTER_FILE); head_info.found = 0; if (head_info.refspec == NULL) { memset(&dummy_spec, 0, sizeof(git_refspec)); head_info.refspec = &dummy_spec; } /* Determine the remote tracking reference name from the local master */ if (git_refspec_transform_r( &remote_master_name, head_info.refspec, GIT_REFS_HEADS_MASTER_FILE) < 0) return -1; /* Check to see if the remote HEAD points to the remote master */ if (reference_matches_remote_head(git_buf_cstr(&remote_master_name), &head_info) < 0) goto cleanup; if (head_info.found) { retcode = update_head_to_new_branch( repo, &head_info.remote_head_oid, git_buf_cstr(&head_info.branchname)); goto cleanup; } /* Not master. Check all the other refs. */ if (git_reference_foreach_name( repo, reference_matches_remote_head, &head_info) < 0) goto cleanup; if (head_info.found) { retcode = update_head_to_new_branch( repo, &head_info.remote_head_oid, git_buf_cstr(&head_info.branchname)); goto cleanup; } else { retcode = git_repository_set_head_detached( repo, &head_info.remote_head_oid); goto cleanup; } cleanup: git_buf_free(&remote_master_name); git_buf_free(&head_info.branchname); return retcode; }
static int update_head_to_remote( git_repository *repo, git_remote *remote, const char *reflog_message) { int error = 0; size_t refs_len; git_refspec *refspec; const git_remote_head *remote_head, **refs; const git_oid *remote_head_id; git_buf remote_master_name = GIT_BUF_INIT; git_buf branch = GIT_BUF_INIT; if ((error = git_remote_ls(&refs, &refs_len, remote)) < 0) return error; /* We cloned an empty repository or one with an unborn HEAD */ if (refs_len == 0 || strcmp(refs[0]->name, GIT_HEAD_FILE)) return setup_tracking_config( repo, "master", GIT_REMOTE_ORIGIN, GIT_REFS_HEADS_MASTER_FILE); /* We know we have HEAD, let's see where it points */ remote_head = refs[0]; assert(remote_head); remote_head_id = &remote_head->oid; error = git_remote_default_branch(&branch, remote); if (error == GIT_ENOTFOUND) { error = git_repository_set_head_detached( repo, remote_head_id); goto cleanup; } refspec = git_remote__matching_refspec(remote, git_buf_cstr(&branch)); if (refspec == NULL) { git_error_set(GIT_ERROR_NET, "the remote's default branch does not fit the refspec configuration"); error = GIT_EINVALIDSPEC; goto cleanup; } /* Determine the remote tracking reference name from the local master */ if ((error = git_refspec_transform( &remote_master_name, refspec, git_buf_cstr(&branch))) < 0) goto cleanup; error = update_head_to_new_branch( repo, remote_head_id, git_buf_cstr(&branch), reflog_message); cleanup: git_buf_dispose(&remote_master_name); git_buf_dispose(&branch); return error; }