diff options
Diffstat (limited to 'src/clone.c')
| -rw-r--r-- | src/clone.c | 655 |
1 files changed, 0 insertions, 655 deletions
diff --git a/src/clone.c b/src/clone.c deleted file mode 100644 index 752df3b92..000000000 --- a/src/clone.c +++ /dev/null @@ -1,655 +0,0 @@ -/* - * 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 "clone.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 "remote.h" -#include "futils.h" -#include "refs.h" -#include "path.h" -#include "repository.h" -#include "odb.h" - -static int clone_local_into(git_repository *repo, git_remote *remote, const git_fetch_options *fetch_opts, const git_checkout_options *co_opts, const char *branch, int link); - -static int create_branch( - git_reference **branch, - git_repository *repo, - const git_oid *target, - const char *name, - const char *log_message) -{ - git_commit *head_obj = NULL; - git_reference *branch_ref = NULL; - git_buf refname = GIT_BUF_INIT; - int error; - - /* Find the target commit */ - if ((error = git_commit_lookup(&head_obj, repo, target)) < 0) - return error; - - /* Create the new branch */ - if ((error = git_buf_printf(&refname, GIT_REFS_HEADS_DIR "%s", name)) < 0) - return error; - - error = git_reference_create(&branch_ref, repo, git_buf_cstr(&refname), target, 0, log_message); - git_buf_dispose(&refname); - 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_dispose(&remote_key); - git_buf_dispose(&merge_key); - return error; -} - -static int create_tracking_branch( - git_reference **branch, - git_repository *repo, - const git_oid *target, - const char *branch_name, - const char *log_message) -{ - int error; - - if ((error = create_branch(branch, repo, target, branch_name, log_message)) < 0) - return error; - - return setup_tracking_config( - repo, - branch_name, - GIT_REMOTE_ORIGIN, - git_reference_name(*branch)); -} - -static int update_head_to_new_branch( - git_repository *repo, - const git_oid *target, - const char *name, - const char *reflog_message) -{ - git_reference *tracking_branch = NULL; - int error; - - if (!git__prefixcmp(name, GIT_REFS_HEADS_DIR)) - name += strlen(GIT_REFS_HEADS_DIR); - - error = create_tracking_branch(&tracking_branch, repo, target, name, - reflog_message); - - if (!error) - error = git_repository_set_head( - repo, git_reference_name(tracking_branch)); - - git_reference_free(tracking_branch); - - /* if it already existed, then the user's refspec created it for us, ignore it' */ - if (error == GIT_EEXISTS) - error = 0; - - return error; -} - -static int update_head_to_default(git_repository *repo) -{ - git_buf initialbranch = GIT_BUF_INIT; - const char *branch_name; - int error = 0; - - if ((error = git_repository_initialbranch(&initialbranch, repo)) < 0) - goto done; - - if (git__prefixcmp(initialbranch.ptr, GIT_REFS_HEADS_DIR) != 0) { - git_error_set(GIT_ERROR_INVALID, "invalid initial branch '%s'", initialbranch.ptr); - error = -1; - goto done; - } - - branch_name = initialbranch.ptr + strlen(GIT_REFS_HEADS_DIR); - - error = setup_tracking_config(repo, branch_name, GIT_REMOTE_ORIGIN, - initialbranch.ptr); - -done: - git_buf_dispose(&initialbranch); - return error; -} - -static int update_remote_head( - git_repository *repo, - git_remote *remote, - git_buf *target, - const char *reflog_message) -{ - git_refspec *refspec; - git_reference *remote_head = NULL; - git_buf remote_head_name = GIT_BUF_INIT; - git_buf remote_branch_name = GIT_BUF_INIT; - int error; - - /* Determine the remote tracking ref name from the local branch */ - refspec = git_remote__matching_refspec(remote, git_buf_cstr(target)); - - 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; - } - - if ((error = git_refspec_transform( - &remote_branch_name, - refspec, - git_buf_cstr(target))) < 0) - goto cleanup; - - if ((error = git_buf_printf(&remote_head_name, - "%s%s/%s", - GIT_REFS_REMOTES_DIR, - git_remote_name(remote), - GIT_HEAD_FILE)) < 0) - goto cleanup; - - error = git_reference_symbolic_create( - &remote_head, - repo, - git_buf_cstr(&remote_head_name), - git_buf_cstr(&remote_branch_name), - true, - reflog_message); - -cleanup: - git_reference_free(remote_head); - git_buf_dispose(&remote_branch_name); - git_buf_dispose(&remote_head_name); - return error; -} - -static int update_head_to_remote( - git_repository *repo, - git_remote *remote, - const char *reflog_message) -{ - int error = 0; - size_t refs_len; - const git_remote_head *remote_head, **refs; - const git_oid *remote_head_id; - 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 update_head_to_default(repo); - - /* We know we have HEAD, let's see where it points */ - remote_head = refs[0]; - GIT_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; - } - - if ((error = update_remote_head(repo, remote, &branch, reflog_message)) < 0) - goto cleanup; - - error = update_head_to_new_branch( - repo, - remote_head_id, - git_buf_cstr(&branch), - reflog_message); - -cleanup: - git_buf_dispose(&branch); - - return error; -} - -static int update_head_to_branch( - git_repository *repo, - git_remote *remote, - const char *branch, - const char *reflog_message) -{ - int retcode; - git_buf remote_branch_name = GIT_BUF_INIT; - git_reference *remote_ref = NULL; - git_buf default_branch = GIT_BUF_INIT; - - GIT_ASSERT_ARG(remote); - GIT_ASSERT_ARG(branch); - - if ((retcode = git_buf_printf(&remote_branch_name, GIT_REFS_REMOTES_DIR "%s/%s", - git_remote_name(remote), branch)) < 0 ) - goto cleanup; - - if ((retcode = git_reference_lookup(&remote_ref, repo, git_buf_cstr(&remote_branch_name))) < 0) - goto cleanup; - - if ((retcode = update_head_to_new_branch(repo, git_reference_target(remote_ref), branch, - reflog_message)) < 0) - goto cleanup; - - if ((retcode = git_remote_default_branch(&default_branch, remote)) < 0) - goto cleanup; - - if (!git_remote__matching_refspec(remote, git_buf_cstr(&default_branch))) - goto cleanup; - - retcode = update_remote_head(repo, remote, &default_branch, reflog_message); - -cleanup: - git_reference_free(remote_ref); - git_buf_dispose(&remote_branch_name); - git_buf_dispose(&default_branch); - return retcode; -} - -static int default_repository_create(git_repository **out, const char *path, int bare, void *payload) -{ - GIT_UNUSED(payload); - - return git_repository_init(out, path, bare); -} - -static int default_remote_create( - git_remote **out, - git_repository *repo, - const char *name, - const char *url, - void *payload) -{ - GIT_UNUSED(payload); - - return git_remote_create(out, repo, name, url); -} - -/* - * 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; - char buf[GIT_PATH_MAX]; - git_remote_create_cb remote_create = options->remote_cb; - void *payload = options->remote_cb_payload; - - /* If the path exists and is a dir, the url should be the absolute path */ - if (git_path_root(url) < 0 && git_path_exists(url) && git_path_isdir(url)) { - if (p_realpath(url, buf) == NULL) - return -1; - - url = buf; - } - - if (!remote_create) { - remote_create = default_remote_create; - payload = NULL; - } - - if ((error = remote_create(&origin, repo, "origin", url, payload)) < 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); -} - -static int checkout_branch(git_repository *repo, git_remote *remote, const git_checkout_options *co_opts, const char *branch, const char *reflog_message) -{ - int error; - - if (branch) - error = update_head_to_branch(repo, remote, branch, reflog_message); - /* Point HEAD to the same ref as the remote's head */ - else - error = update_head_to_remote(repo, remote, reflog_message); - - if (!error && should_checkout(repo, git_repository_is_bare(repo), co_opts)) - error = git_checkout_head(repo, co_opts); - - return error; -} - -static int clone_into(git_repository *repo, git_remote *_remote, const git_fetch_options *opts, const git_checkout_options *co_opts, const char *branch) -{ - int error; - git_buf reflog_message = GIT_BUF_INIT; - git_fetch_options fetch_opts; - git_remote *remote; - - GIT_ASSERT_ARG(repo); - GIT_ASSERT_ARG(_remote); - - if (!git_repository_is_empty(repo)) { - git_error_set(GIT_ERROR_INVALID, "the repository is not empty"); - return -1; - } - - if ((error = git_remote_dup(&remote, _remote)) < 0) - return error; - - memcpy(&fetch_opts, opts, sizeof(git_fetch_options)); - fetch_opts.update_fetchhead = 0; - fetch_opts.download_tags = GIT_REMOTE_DOWNLOAD_TAGS_ALL; - git_buf_printf(&reflog_message, "clone: from %s", git_remote_url(remote)); - - if ((error = git_remote_fetch(remote, NULL, &fetch_opts, git_buf_cstr(&reflog_message))) != 0) - goto cleanup; - - error = checkout_branch(repo, remote, co_opts, branch, git_buf_cstr(&reflog_message)); - -cleanup: - git_remote_free(remote); - git_buf_dispose(&reflog_message); - - return error; -} - -int git_clone__should_clone_local(const char *url_or_path, git_clone_local_t local) -{ - git_buf fromurl = GIT_BUF_INIT; - const char *path = url_or_path; - bool is_url, is_local; - - if (local == GIT_CLONE_NO_LOCAL) - return 0; - - if ((is_url = git_path_is_local_file_url(url_or_path)) != 0) { - if (git_path_fromurl(&fromurl, url_or_path) < 0) { - is_local = -1; - goto done; - } - - path = fromurl.ptr; - } - - is_local = (!is_url || local != GIT_CLONE_LOCAL_AUTO) && - git_path_isdir(path); - -done: - git_buf_dispose(&fromurl); - return is_local; -} - -static int git__clone( - git_repository **out, - const char *url, - const char *local_path, - const git_clone_options *_options, - int use_existing) -{ - 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; - git_repository_create_cb repository_cb; - - GIT_ASSERT_ARG(out); - GIT_ASSERT_ARG(url); - GIT_ASSERT_ARG(local_path); - - if (_options) - memcpy(&options, _options, sizeof(git_clone_options)); - - GIT_ERROR_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) && !use_existing && !git_path_is_empty_dir(local_path)) { - git_error_set(GIT_ERROR_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 (options.repository_cb) - repository_cb = options.repository_cb; - else - repository_cb = default_repository_create; - - if ((error = repository_cb(&repo, local_path, options.bare, options.repository_cb_payload)) < 0) - return error; - - if (!(error = create_and_configure_origin(&origin, repo, url, &options))) { - int clone_local = git_clone__should_clone_local(url, options.local); - int link = options.local != GIT_CLONE_LOCAL_NO_LINKS; - - if (clone_local == 1) - error = clone_local_into( - repo, origin, &options.fetch_opts, &options.checkout_opts, - options.checkout_branch, link); - else if (clone_local == 0) - error = clone_into( - repo, origin, &options.fetch_opts, &options.checkout_opts, - options.checkout_branch); - else - error = -1; - - git_remote_free(origin); - } - - if (error != 0) { - git_error_state last_error = {0}; - git_error_state_capture(&last_error, error); - - git_repository_free(repo); - repo = NULL; - - (void)git_futils_rmdir_r(local_path, NULL, rmdir_flags); - - git_error_state_restore(&last_error); - } - - *out = repo; - return error; -} - -int git_clone( - git_repository **out, - const char *url, - const char *local_path, - const git_clone_options *_options) -{ - return git__clone(out, url, local_path, _options, 0); -} - -int git_clone__submodule( - git_repository **out, - const char *url, - const char *local_path, - const git_clone_options *_options) -{ - return git__clone(out, url, local_path, _options, 1); -} - -int git_clone_options_init(git_clone_options *opts, unsigned int version) -{ - GIT_INIT_STRUCTURE_FROM_TEMPLATE( - opts, version, git_clone_options, GIT_CLONE_OPTIONS_INIT); - return 0; -} - -#ifndef GIT_DEPRECATE_HARD -int git_clone_init_options(git_clone_options *opts, unsigned int version) -{ - return git_clone_options_init(opts, version); -} -#endif - -static bool can_link(const char *src, const char *dst, int link) -{ -#ifdef GIT_WIN32 - GIT_UNUSED(src); - GIT_UNUSED(dst); - GIT_UNUSED(link); - return false; -#else - - struct stat st_src, st_dst; - - if (!link) - return false; - - if (p_stat(src, &st_src) < 0) - return false; - - if (p_stat(dst, &st_dst) < 0) - return false; - - return st_src.st_dev == st_dst.st_dev; -#endif -} - -static int clone_local_into(git_repository *repo, git_remote *remote, const git_fetch_options *fetch_opts, const git_checkout_options *co_opts, const char *branch, int link) -{ - int error, flags; - git_repository *src; - git_buf src_odb = GIT_BUF_INIT, dst_odb = GIT_BUF_INIT, src_path = GIT_BUF_INIT; - git_buf reflog_message = GIT_BUF_INIT; - - GIT_ASSERT_ARG(repo); - GIT_ASSERT_ARG(remote); - - if (!git_repository_is_empty(repo)) { - git_error_set(GIT_ERROR_INVALID, "the repository is not empty"); - return -1; - } - - /* - * Let's figure out what path we should use for the source - * repo, if it's not rooted, the path should be relative to - * the repository's worktree/gitdir. - */ - if ((error = git_path_from_url_or_path(&src_path, git_remote_url(remote))) < 0) - return error; - - /* Copy .git/objects/ from the source to the target */ - if ((error = git_repository_open(&src, git_buf_cstr(&src_path))) < 0) { - git_buf_dispose(&src_path); - return error; - } - - if (git_repository_item_path(&src_odb, src, GIT_REPOSITORY_ITEM_OBJECTS) < 0 - || git_repository_item_path(&dst_odb, repo, GIT_REPOSITORY_ITEM_OBJECTS) < 0) { - error = -1; - goto cleanup; - } - - flags = 0; - if (can_link(git_repository_path(src), git_repository_path(repo), link)) - flags |= GIT_CPDIR_LINK_FILES; - - error = git_futils_cp_r(git_buf_cstr(&src_odb), git_buf_cstr(&dst_odb), - flags, GIT_OBJECT_DIR_MODE); - - /* - * can_link() doesn't catch all variations, so if we hit an - * error and did want to link, let's try again without trying - * to link. - */ - if (error < 0 && link) { - flags &= ~GIT_CPDIR_LINK_FILES; - error = git_futils_cp_r(git_buf_cstr(&src_odb), git_buf_cstr(&dst_odb), - flags, GIT_OBJECT_DIR_MODE); - } - - if (error < 0) - goto cleanup; - - git_buf_printf(&reflog_message, "clone: from %s", git_remote_url(remote)); - - if ((error = git_remote_fetch(remote, NULL, fetch_opts, git_buf_cstr(&reflog_message))) != 0) - goto cleanup; - - error = checkout_branch(repo, remote, co_opts, branch, git_buf_cstr(&reflog_message)); - -cleanup: - git_buf_dispose(&reflog_message); - git_buf_dispose(&src_path); - git_buf_dispose(&src_odb); - git_buf_dispose(&dst_odb); - git_repository_free(src); - return error; -} |