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Diffstat (limited to 'third_party/git/builtin/clone.c')
-rw-r--r--third_party/git/builtin/clone.c157
1 files changed, 106 insertions, 51 deletions
diff --git a/third_party/git/builtin/clone.c b/third_party/git/builtin/clone.c
index f665b28ccccf..391aa41075ee 100644
--- a/third_party/git/builtin/clone.c
+++ b/third_party/git/builtin/clone.c
@@ -32,7 +32,6 @@
 #include "connected.h"
 #include "packfile.h"
 #include "list-objects-filter-options.h"
-#include "object-store.h"
 
 /*
  * Overall FIXMEs:
@@ -60,6 +59,7 @@ static const char *real_git_dir;
 static char *option_upload_pack = "git-upload-pack";
 static int option_verbosity;
 static int option_progress = -1;
+static int option_sparse_checkout;
 static enum transport_family family;
 static struct string_list option_config = STRING_LIST_INIT_NODUP;
 static struct string_list option_required_reference = STRING_LIST_INIT_NODUP;
@@ -102,10 +102,10 @@ static struct option builtin_clone_options[] = {
 		    N_("don't use local hardlinks, always copy")),
 	OPT_BOOL('s', "shared", &option_shared,
 		    N_("setup as shared repository")),
-	OPT_ALIAS(0, "recursive", "recurse-submodules"),
 	{ OPTION_CALLBACK, 0, "recurse-submodules", &option_recurse_submodules,
 	  N_("pathspec"), N_("initialize submodules in the clone"),
 	  PARSE_OPT_OPTARG, recurse_submodules_cb, (intptr_t)"." },
+	OPT_ALIAS(0, "recursive", "recurse-submodules"),
 	OPT_INTEGER('j', "jobs", &max_jobs,
 		    N_("number of submodules cloned in parallel")),
 	OPT_STRING(0, "template", &option_template, N_("template-directory"),
@@ -147,6 +147,8 @@ static struct option builtin_clone_options[] = {
 	OPT_PARSE_LIST_OBJECTS_FILTER(&filter_options),
 	OPT_BOOL(0, "remote-submodules", &option_remote_submodules,
 		    N_("any cloned submodules will use their remote-tracking branch")),
+	OPT_BOOL(0, "sparse", &option_sparse_checkout,
+		    N_("initialize sparse-checkout file to include only files at root")),
 	OPT_END()
 };
 
@@ -418,6 +420,7 @@ static void copy_or_link_directory(struct strbuf *src, struct strbuf *dest,
 	struct dir_iterator *iter;
 	int iter_status;
 	unsigned int flags;
+	struct strbuf realpath = STRBUF_INIT;
 
 	mkdir_if_missing(dest->buf, 0777);
 
@@ -452,7 +455,8 @@ static void copy_or_link_directory(struct strbuf *src, struct strbuf *dest,
 		if (unlink(dest->buf) && errno != ENOENT)
 			die_errno(_("failed to unlink '%s'"), dest->buf);
 		if (!option_no_hardlinks) {
-			if (!link(real_path(src->buf), dest->buf))
+			strbuf_realpath(&realpath, src->buf, 1);
+			if (!link(realpath.buf, dest->buf))
 				continue;
 			if (option_local > 0)
 				die_errno(_("failed to create link '%s'"), dest->buf);
@@ -466,6 +470,8 @@ static void copy_or_link_directory(struct strbuf *src, struct strbuf *dest,
 		strbuf_setlen(src, src_len);
 		die(_("failed to iterate over '%s'"), src->buf);
 	}
+
+	strbuf_release(&realpath);
 }
 
 static void clone_local(const char *src_repo, const char *dest_repo)
@@ -637,7 +643,9 @@ static void write_followtags(const struct ref *refs, const char *msg)
 			continue;
 		if (ends_with(ref->name, "^{}"))
 			continue;
-		if (!has_object_file(&ref->old_oid))
+		if (!has_object_file_with_flags(&ref->old_oid,
+						OBJECT_INFO_QUICK |
+						OBJECT_INFO_SKIP_FETCH_OBJECT))
 			continue;
 		update_ref(msg, ref->name, &ref->old_oid, NULL, 0,
 			   UPDATE_REFS_DIE_ON_ERR);
@@ -670,8 +678,7 @@ static void update_remote_refs(const struct ref *refs,
 			       const char *branch_top,
 			       const char *msg,
 			       struct transport *transport,
-			       int check_connectivity,
-			       int check_refs_only)
+			       int check_connectivity)
 {
 	const struct ref *rm = mapped_refs;
 
@@ -680,7 +687,6 @@ static void update_remote_refs(const struct ref *refs,
 
 		opt.transport = transport;
 		opt.progress = transport->progress;
-		opt.check_refs_only = !!check_refs_only;
 
 		if (check_connected(iterate_ref_map, &rm, &opt))
 			die(_("remote did not send all necessary objects"));
@@ -734,6 +740,27 @@ static void update_head(const struct ref *our, const struct ref *remote,
 	}
 }
 
+static int git_sparse_checkout_init(const char *repo)
+{
+	struct strvec argv = STRVEC_INIT;
+	int result = 0;
+	strvec_pushl(&argv, "-C", repo, "sparse-checkout", "init", NULL);
+
+	/*
+	 * We must apply the setting in the current process
+	 * for the later checkout to use the sparse-checkout file.
+	 */
+	core_apply_sparse_checkout = 1;
+
+	if (run_command_v_opt(argv.v, RUN_GIT_CMD)) {
+		error(_("failed to initialize sparse-checkout"));
+		result = 1;
+	}
+
+	strvec_clear(&argv);
+	return result;
+}
+
 static int checkout(int submodule_progress)
 {
 	struct object_id oid;
@@ -756,11 +783,11 @@ static int checkout(int submodule_progress)
 	if (!strcmp(head, "HEAD")) {
 		if (advice_detached_head)
 			detach_advice(oid_to_hex(&oid));
+		FREE_AND_NULL(head);
 	} else {
 		if (!starts_with(head, "refs/heads/"))
 			die(_("HEAD not found below refs/heads!"));
 	}
-	free(head);
 
 	/* We need to be in the new work tree for the checkout */
 	setup_work_tree();
@@ -775,6 +802,7 @@ static int checkout(int submodule_progress)
 	opts.verbose_update = (option_verbosity >= 0);
 	opts.src_index = &the_index;
 	opts.dst_index = &the_index;
+	init_checkout_metadata(&opts.meta, head, &oid, NULL);
 
 	tree = parse_tree_indirect(&oid);
 	parse_tree(tree);
@@ -782,35 +810,42 @@ static int checkout(int submodule_progress)
 	if (unpack_trees(1, &t, &opts) < 0)
 		die(_("unable to checkout working tree"));
 
+	free(head);
+
 	if (write_locked_index(&the_index, &lock_file, COMMIT_LOCK))
 		die(_("unable to write new index file"));
 
-	err |= run_hook_le(NULL, "post-checkout", sha1_to_hex(null_sha1),
+	err |= run_hook_le(NULL, "post-checkout", oid_to_hex(&null_oid),
 			   oid_to_hex(&oid), "1", NULL);
 
 	if (!err && (option_recurse_submodules.nr > 0)) {
-		struct argv_array args = ARGV_ARRAY_INIT;
-		argv_array_pushl(&args, "submodule", "update", "--init", "--recursive", NULL);
+		struct strvec args = STRVEC_INIT;
+		strvec_pushl(&args, "submodule", "update", "--require-init", "--recursive", NULL);
 
 		if (option_shallow_submodules == 1)
-			argv_array_push(&args, "--depth=1");
+			strvec_push(&args, "--depth=1");
 
 		if (max_jobs != -1)
-			argv_array_pushf(&args, "--jobs=%d", max_jobs);
+			strvec_pushf(&args, "--jobs=%d", max_jobs);
 
 		if (submodule_progress)
-			argv_array_push(&args, "--progress");
+			strvec_push(&args, "--progress");
 
 		if (option_verbosity < 0)
-			argv_array_push(&args, "--quiet");
+			strvec_push(&args, "--quiet");
 
 		if (option_remote_submodules) {
-			argv_array_push(&args, "--remote");
-			argv_array_push(&args, "--no-fetch");
+			strvec_push(&args, "--remote");
+			strvec_push(&args, "--no-fetch");
 		}
 
-		err = run_command_v_opt(args.argv, RUN_GIT_CMD);
-		argv_array_clear(&args);
+		if (option_single_branch >= 0)
+			strvec_push(&args, option_single_branch ?
+					       "--single-branch" :
+					       "--no-single-branch");
+
+		err = run_command_v_opt(args.v, RUN_GIT_CMD);
+		strvec_clear(&args);
 	}
 
 	return err;
@@ -900,7 +935,7 @@ static void dissociate_from_references(void)
 	free(alternates);
 }
 
-static int dir_exists(const char *path)
+static int path_exists(const char *path)
 {
 	struct stat sb;
 	return !stat(path, &sb);
@@ -910,15 +945,14 @@ int cmd_clone(int argc, const char **argv, const char *prefix)
 {
 	int is_bundle = 0, is_local;
 	const char *repo_name, *repo, *work_tree, *git_dir;
-	char *path, *dir;
-	int dest_exists;
+	char *path, *dir, *display_repo = NULL;
+	int dest_exists, real_dest_exists = 0;
 	const struct ref *refs, *remote_head;
 	const struct ref *remote_head_points_at;
 	const struct ref *our_head_points_at;
 	struct ref *mapped_refs;
 	const struct ref *ref;
 	struct strbuf key = STRBUF_INIT;
-	struct strbuf default_refspec = STRBUF_INIT;
 	struct strbuf branch_top = STRBUF_INIT, reflog_msg = STRBUF_INIT;
 	struct transport *transport = NULL;
 	const char *src_ref_prefix = "refs/heads/";
@@ -926,9 +960,7 @@ int cmd_clone(int argc, const char **argv, const char *prefix)
 	int err = 0, complete_refs_before_fetch = 1;
 	int submodule_progress;
 
-	struct argv_array ref_prefixes = ARGV_ARRAY_INIT;
-
-	fetch_if_missing = 0;
+	struct strvec ref_prefixes = STRVEC_INIT;
 
 	packet_trace_identity("clone");
 	argc = parse_options(argc, argv, prefix, builtin_clone_options,
@@ -967,10 +999,11 @@ int cmd_clone(int argc, const char **argv, const char *prefix)
 	path = get_repo_path(repo_name, &is_bundle);
 	if (path)
 		repo = absolute_pathdup(repo_name);
-	else if (!strchr(repo_name, ':'))
-		die(_("repository '%s' does not exist"), repo_name);
-	else
+	else if (strchr(repo_name, ':')) {
 		repo = repo_name;
+		display_repo = transport_anonymize_url(repo);
+	} else
+		die(_("repository '%s' does not exist"), repo_name);
 
 	/* no need to be strict, transport_set_option() will validate it again */
 	if (option_depth && atoi(option_depth) < 1)
@@ -982,18 +1015,28 @@ int cmd_clone(int argc, const char **argv, const char *prefix)
 		dir = guess_dir_name(repo_name, is_bundle, option_bare);
 	strip_trailing_slashes(dir);
 
-	dest_exists = dir_exists(dir);
+	dest_exists = path_exists(dir);
 	if (dest_exists && !is_empty_dir(dir))
 		die(_("destination path '%s' already exists and is not "
 			"an empty directory."), dir);
 
-	strbuf_addf(&reflog_msg, "clone: from %s", repo);
+	if (real_git_dir) {
+		real_dest_exists = path_exists(real_git_dir);
+		if (real_dest_exists && !is_empty_dir(real_git_dir))
+			die(_("repository path '%s' already exists and is not "
+				"an empty directory."), real_git_dir);
+	}
+
+
+	strbuf_addf(&reflog_msg, "clone: from %s",
+		    display_repo ? display_repo : repo);
+	free(display_repo);
 
 	if (option_bare)
 		work_tree = NULL;
 	else {
 		work_tree = getenv("GIT_WORK_TREE");
-		if (work_tree && dir_exists(work_tree))
+		if (work_tree && path_exists(work_tree))
 			die(_("working tree '%s' already exists."), work_tree);
 	}
 
@@ -1021,7 +1064,7 @@ int cmd_clone(int argc, const char **argv, const char *prefix)
 	}
 
 	if (real_git_dir) {
-		if (dir_exists(real_git_dir))
+		if (real_dest_exists)
 			junk_git_dir_flags |= REMOVE_DIR_KEEP_TOPLEVEL;
 		junk_git_dir = real_git_dir;
 	} else {
@@ -1075,7 +1118,8 @@ int cmd_clone(int argc, const char **argv, const char *prefix)
 		}
 	}
 
-	init_db(git_dir, real_git_dir, option_template, INIT_DB_QUIET);
+	init_db(git_dir, real_git_dir, option_template, GIT_HASH_UNKNOWN, NULL,
+		INIT_DB_QUIET);
 
 	if (real_git_dir)
 		git_dir = real_git_dir;
@@ -1107,11 +1151,13 @@ int cmd_clone(int argc, const char **argv, const char *prefix)
 	if (option_required_reference.nr || option_optional_reference.nr)
 		setup_reference();
 
+	if (option_sparse_checkout && git_sparse_checkout_init(dir))
+		return 1;
+
 	remote = remote_get(option_origin);
 
-	strbuf_addf(&default_refspec, "+%s*:%s*", src_ref_prefix,
-		    branch_top.buf);
-	refspec_append(&remote->fetch, default_refspec.buf);
+	refspec_appendf(&remote->fetch, "+%s*:%s*", src_ref_prefix,
+			branch_top.buf);
 
 	transport = transport_get(remote, remote->url[0]);
 	transport_set_verbosity(transport, option_verbosity, option_progress);
@@ -1160,29 +1206,36 @@ int cmd_clone(int argc, const char **argv, const char *prefix)
 		transport->server_options = &server_options;
 
 	if (filter_options.choice) {
-		struct strbuf expanded_filter_spec = STRBUF_INIT;
-		expand_list_objects_filter_spec(&filter_options,
-						&expanded_filter_spec);
+		const char *spec =
+			expand_list_objects_filter_spec(&filter_options);
 		transport_set_option(transport, TRANS_OPT_LIST_OBJECTS_FILTER,
-				     expanded_filter_spec.buf);
+				     spec);
 		transport_set_option(transport, TRANS_OPT_FROM_PROMISOR, "1");
-		strbuf_release(&expanded_filter_spec);
 	}
 
 	if (transport->smart_options && !deepen && !filter_options.choice)
 		transport->smart_options->check_self_contained_and_connected = 1;
 
 
-	argv_array_push(&ref_prefixes, "HEAD");
+	strvec_push(&ref_prefixes, "HEAD");
 	refspec_ref_prefixes(&remote->fetch, &ref_prefixes);
 	if (option_branch)
 		expand_ref_prefix(&ref_prefixes, option_branch);
 	if (!option_no_tags)
-		argv_array_push(&ref_prefixes, "refs/tags/");
+		strvec_push(&ref_prefixes, "refs/tags/");
 
 	refs = transport_get_remote_refs(transport, &ref_prefixes);
 
 	if (refs) {
+		int hash_algo = hash_algo_by_ptr(transport_get_hash_algo(transport));
+
+		/*
+		 * Now that we know what algorithm the remote side is using,
+		 * let's set ours to the same thing.
+		 */
+		initialize_repository_version(hash_algo, 1);
+		repo_set_hash_algo(the_repository, hash_algo);
+
 		mapped_refs = wanted_peer_refs(refs, &remote->fetch);
 		/*
 		 * transport_get_remote_refs() may return refs with null sha-1
@@ -1229,9 +1282,13 @@ int cmd_clone(int argc, const char **argv, const char *prefix)
 		remote_head_points_at = NULL;
 		remote_head = NULL;
 		option_no_checkout = 1;
-		if (!option_bare)
-			install_branch_config(0, "master", option_origin,
-					      "refs/heads/master");
+		if (!option_bare) {
+			const char *branch = git_default_branch_name();
+			char *ref = xstrfmt("refs/heads/%s", branch);
+
+			install_branch_config(0, branch, option_origin, ref);
+			free(ref);
+		}
 	}
 
 	write_refspec_config(src_ref_prefix, our_head_points_at,
@@ -1247,7 +1304,7 @@ int cmd_clone(int argc, const char **argv, const char *prefix)
 
 	update_remote_refs(refs, mapped_refs, remote_head_points_at,
 			   branch_top.buf, reflog_msg.buf, transport,
-			   !is_local, filter_options.choice);
+			   !is_local);
 
 	update_head(our_head_points_at, remote_head, reflog_msg.buf);
 
@@ -1268,15 +1325,13 @@ int cmd_clone(int argc, const char **argv, const char *prefix)
 	}
 
 	junk_mode = JUNK_LEAVE_REPO;
-	fetch_if_missing = 1;
 	err = checkout(submodule_progress);
 
 	strbuf_release(&reflog_msg);
 	strbuf_release(&branch_top);
 	strbuf_release(&key);
-	strbuf_release(&default_refspec);
 	junk_mode = JUNK_LEAVE_ALL;
 
-	argv_array_clear(&ref_prefixes);
+	strvec_clear(&ref_prefixes);
 	return err;
 }