| /* |
| * Copyright (C) the libgit2 contributors. All rights reserved. |
| * |
| * This file is part of libgit2, distributed under the GNU GPL v2 with |
| * a Linking Exception. For full terms see the included COPYING file. |
| */ |
| |
| #include <assert.h> |
| |
| #include "git2/clone.h" |
| #include "git2/remote.h" |
| #include "git2/revparse.h" |
| #include "git2/branch.h" |
| #include "git2/config.h" |
| #include "git2/checkout.h" |
| #include "git2/commit.h" |
| #include "git2/tree.h" |
| |
| #include "common.h" |
| #include "remote.h" |
| #include "fileops.h" |
| #include "refs.h" |
| #include "path.h" |
| #include "repository.h" |
| |
| static int create_branch( |
| git_reference **branch, |
| git_repository *repo, |
| const git_oid *target, |
| const char *name, |
| const git_signature *signature, |
| const char *log_message) |
| { |
| git_commit *head_obj = NULL; |
| git_reference *branch_ref = NULL; |
| int error; |
| |
| /* Find the target commit */ |
| if ((error = git_commit_lookup(&head_obj, repo, target)) < 0) |
| return error; |
| |
| /* Create the new branch */ |
| error = git_branch_create(&branch_ref, repo, name, head_obj, 0, signature, log_message); |
| |
| git_commit_free(head_obj); |
| |
| if (!error) |
| *branch = branch_ref; |
| else |
| git_reference_free(branch_ref); |
| |
| return error; |
| } |
| |
| static int setup_tracking_config( |
| git_repository *repo, |
| const char *branch_name, |
| const char *remote_name, |
| const char *merge_target) |
| { |
| git_config *cfg; |
| git_buf remote_key = GIT_BUF_INIT, merge_key = GIT_BUF_INIT; |
| int error = -1; |
| |
| if (git_repository_config__weakptr(&cfg, repo) < 0) |
| return -1; |
| |
| if (git_buf_printf(&remote_key, "branch.%s.remote", branch_name) < 0) |
| goto cleanup; |
| |
| if (git_buf_printf(&merge_key, "branch.%s.merge", branch_name) < 0) |
| goto cleanup; |
| |
| if (git_config_set_string(cfg, git_buf_cstr(&remote_key), remote_name) < 0) |
| goto cleanup; |
| |
| if (git_config_set_string(cfg, git_buf_cstr(&merge_key), merge_target) < 0) |
| goto cleanup; |
| |
| error = 0; |
| |
| cleanup: |
| git_buf_free(&remote_key); |
| git_buf_free(&merge_key); |
| return error; |
| } |
| |
| static int create_tracking_branch( |
| git_reference **branch, |
| git_repository *repo, |
| const git_oid *target, |
| const char *branch_name, |
| const git_signature *signature, |
| const char *log_message) |
| { |
| int error; |
| |
| if ((error = create_branch(branch, repo, target, branch_name, signature, log_message)) < 0) |
| return error; |
| |
| return setup_tracking_config( |
| repo, |
| branch_name, |
| GIT_REMOTE_ORIGIN, |
| git_reference_name(*branch)); |
| } |
| |
| struct head_info { |
| git_repository *repo; |
| git_oid remote_head_oid; |
| git_buf branchname; |
| const git_refspec *refspec; |
| bool found; |
| }; |
| |
| static int reference_matches_remote_head( |
| const char *reference_name, |
| void *payload) |
| { |
| struct head_info *head_info = (struct head_info *)payload; |
| git_oid oid; |
| int error; |
| |
| /* TODO: Should we guard against references |
| * which name doesn't start with refs/heads/ ? |
| */ |
| |
| error = git_reference_name_to_id(&oid, head_info->repo, reference_name); |
| if (error == GIT_ENOTFOUND) { |
| /* If the reference doesn't exists, it obviously cannot match the |
| * expected oid. */ |
| giterr_clear(); |
| return 0; |
| } |
| |
| if (!error && !git_oid__cmp(&head_info->remote_head_oid, &oid)) { |
| /* Determine the local reference name from the remote tracking one */ |
| error = git_refspec_rtransform( |
| &head_info->branchname, head_info->refspec, reference_name); |
| |
| if (!error && |
| git_buf_len(&head_info->branchname) > 0 && |
| !(error = git_buf_sets( |
| &head_info->branchname, |
| git_buf_cstr(&head_info->branchname) + |
| strlen(GIT_REFS_HEADS_DIR)))) |
| { |
| head_info->found = true; |
| error = GIT_ITEROVER; |
| } |
| } |
| |
| return error; |
| } |
| |
| static int update_head_to_new_branch( |
| git_repository *repo, |
| const git_oid *target, |
| const char *name, |
| const git_signature *signature, |
| const char *reflog_message) |
| { |
| git_reference *tracking_branch = NULL; |
| int error = create_tracking_branch(&tracking_branch, repo, target, name, |
| signature, reflog_message); |
| |
| if (!error) |
| error = git_repository_set_head( |
| repo, git_reference_name(tracking_branch), |
| signature, reflog_message); |
| |
| git_reference_free(tracking_branch); |
| |
| return error; |
| } |
| |
| static int update_head_to_remote( |
| git_repository *repo, |
| git_remote *remote, |
| const git_signature *signature, |
| const char *reflog_message) |
| { |
| int error = 0; |
| size_t refs_len; |
| git_refspec dummy_spec; |
| const git_remote_head *remote_head, **refs; |
| struct head_info head_info; |
| git_buf remote_master_name = 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); |
| |
| /* Get the remote's HEAD. This is always the first ref in the list. */ |
| remote_head = refs[0]; |
| assert(remote_head); |
| |
| memset(&head_info, 0, sizeof(head_info)); |
| git_oid_cpy(&head_info.remote_head_oid, &remote_head->oid); |
| head_info.repo = repo; |
| head_info.refspec = |
| git_remote__matching_refspec(remote, GIT_REFS_HEADS_MASTER_FILE); |
| |
| 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 ((error = git_refspec_transform( |
| &remote_master_name, |
| head_info.refspec, |
| GIT_REFS_HEADS_MASTER_FILE)) < 0) |
| return error; |
| |
| /* Check to see if the remote HEAD points to the remote master */ |
| error = reference_matches_remote_head( |
| git_buf_cstr(&remote_master_name), &head_info); |
| if (error < 0 && error != GIT_ITEROVER) |
| goto cleanup; |
| |
| if (head_info.found) { |
| error = update_head_to_new_branch( |
| repo, |
| &head_info.remote_head_oid, |
| git_buf_cstr(&head_info.branchname), |
| signature, reflog_message); |
| goto cleanup; |
| } |
| |
| /* Not master. Check all the other refs. */ |
| error = git_reference_foreach_name( |
| repo, reference_matches_remote_head, &head_info); |
| if (error < 0 && error != GIT_ITEROVER) |
| goto cleanup; |
| |
| if (head_info.found) { |
| error = update_head_to_new_branch( |
| repo, |
| &head_info.remote_head_oid, |
| git_buf_cstr(&head_info.branchname), |
| signature, reflog_message); |
| } else { |
| error = git_repository_set_head_detached( |
| repo, &head_info.remote_head_oid, signature, reflog_message); |
| } |
| |
| cleanup: |
| git_buf_free(&remote_master_name); |
| git_buf_free(&head_info.branchname); |
| return error; |
| } |
| |
| static int update_head_to_branch( |
| git_repository *repo, |
| const char *remote_name, |
| const char *branch, |
| const git_signature *signature, |
| const char *reflog_message) |
| { |
| 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, |
| signature, reflog_message); |
| |
| cleanup: |
| git_reference_free(remote_ref); |
| git_buf_free(&remote_branch_name); |
| return retcode; |
| } |
| |
| /* |
| * submodules? |
| */ |
| |
| static int create_and_configure_origin( |
| git_remote **out, |
| git_repository *repo, |
| const char *url, |
| const git_clone_options *options) |
| { |
| int error; |
| git_remote *origin = NULL; |
| const char *name; |
| |
| name = options->remote_name ? options->remote_name : "origin"; |
| if ((error = git_remote_create(&origin, repo, name, url)) < 0) |
| goto on_error; |
| |
| if (options->ignore_cert_errors) |
| git_remote_check_cert(origin, 0); |
| |
| if ((error = git_remote_set_callbacks(origin, &options->remote_callbacks)) < 0) |
| goto on_error; |
| |
| if ((error = git_remote_save(origin)) < 0) |
| goto on_error; |
| |
| *out = origin; |
| return 0; |
| |
| on_error: |
| git_remote_free(origin); |
| return error; |
| } |
| |
| static bool should_checkout( |
| git_repository *repo, |
| bool is_bare, |
| const git_checkout_options *opts) |
| { |
| if (is_bare) |
| return false; |
| |
| if (!opts) |
| return false; |
| |
| if (opts->checkout_strategy == GIT_CHECKOUT_NONE) |
| return false; |
| |
| return !git_repository_head_unborn(repo); |
| } |
| |
| int git_clone_into(git_repository *repo, git_remote *remote, const git_checkout_options *co_opts, const char *branch, const git_signature *signature) |
| { |
| int error = 0, old_fetchhead; |
| git_strarray refspecs; |
| git_buf reflog_message = GIT_BUF_INIT; |
| |
| assert(repo && remote); |
| |
| if (!git_repository_is_empty(repo)) { |
| giterr_set(GITERR_INVALID, "the repository is not empty"); |
| return -1; |
| } |
| |
| |
| if ((error = git_remote_get_fetch_refspecs(&refspecs, remote)) < 0) |
| return error; |
| |
| if ((error = git_remote_add_fetch(remote, "refs/tags/*:refs/tags/*")) < 0) |
| return error; |
| |
| old_fetchhead = git_remote_update_fetchhead(remote); |
| git_remote_set_update_fetchhead(remote, 0); |
| git_buf_printf(&reflog_message, "clone: from %s", git_remote_url(remote)); |
| |
| if ((error = git_remote_fetch(remote, signature, git_buf_cstr(&reflog_message))) != 0) |
| goto cleanup; |
| |
| if (branch) |
| error = update_head_to_branch(repo, git_remote_name(remote), branch, |
| signature, git_buf_cstr(&reflog_message)); |
| /* Point HEAD to the same ref as the remote's head */ |
| else |
| error = update_head_to_remote(repo, remote, signature, git_buf_cstr(&reflog_message)); |
| |
| if (!error && should_checkout(repo, git_repository_is_bare(repo), co_opts)) |
| error = git_checkout_head(repo, co_opts); |
| |
| cleanup: |
| git_remote_set_update_fetchhead(remote, old_fetchhead); |
| |
| /* Go back to the original refspecs */ |
| { |
| int error_alt = git_remote_set_fetch_refspecs(remote, &refspecs); |
| if (!error) |
| error = error_alt; |
| } |
| |
| git_strarray_free(&refspecs); |
| git_buf_free(&reflog_message); |
| |
| return error; |
| } |
| |
| int git_clone( |
| git_repository **out, |
| const char *url, |
| const char *local_path, |
| const git_clone_options *_options) |
| { |
| int error = 0; |
| git_repository *repo = NULL; |
| git_remote *origin; |
| git_clone_options options = GIT_CLONE_OPTIONS_INIT; |
| uint32_t rmdir_flags = GIT_RMDIR_REMOVE_FILES; |
| |
| assert(out && url && local_path); |
| |
| if (_options) |
| memcpy(&options, _options, sizeof(git_clone_options)); |
| |
| GITERR_CHECK_VERSION(&options, GIT_CLONE_OPTIONS_VERSION, "git_clone_options"); |
| |
| /* Only clone to a new directory or an empty directory */ |
| if (git_path_exists(local_path) && !git_path_is_empty_dir(local_path)) { |
| giterr_set(GITERR_INVALID, |
| "'%s' exists and is not an empty directory", local_path); |
| return GIT_EEXISTS; |
| } |
| |
| /* Only remove the root directory on failure if we create it */ |
| if (git_path_exists(local_path)) |
| rmdir_flags |= GIT_RMDIR_SKIP_ROOT; |
| |
| if ((error = git_repository_init(&repo, local_path, options.bare)) < 0) |
| return error; |
| |
| if (!(error = create_and_configure_origin(&origin, repo, url, &options))) { |
| error = git_clone_into( |
| repo, origin, &options.checkout_opts, options.checkout_branch, options.signature); |
| |
| git_remote_free(origin); |
| } |
| |
| if (error != 0) { |
| git_error_state last_error = {0}; |
| giterr_capture(&last_error, error); |
| |
| git_repository_free(repo); |
| repo = NULL; |
| |
| (void)git_futils_rmdir_r(local_path, NULL, rmdir_flags); |
| |
| giterr_restore(&last_error); |
| } |
| |
| *out = repo; |
| return error; |
| } |
| |
| int git_clone_init_options(git_clone_options *opts, unsigned int version) |
| { |
| GIT_INIT_STRUCTURE_FROM_TEMPLATE( |
| opts, version, git_clone_options, GIT_CLONE_OPTIONS_INIT); |
| return 0; |
| } |