32 files changed, 859 insertions, 486 deletions

diff --git a/builtin/am.c b/builtin/am.c
index acfe9d3c8c..6661edc162 100644
--- a/builtin/am.c
+++ b/builtin/am.c
@@ -1061,7 +1061,7 @@ static void am_setup(struct am_state *state, enum patch_format patch_format,
 	}
 	write_state_text(state, "scissors", str);
 
-	sq_quote_argv(&sb, state->git_apply_opts.argv, 0);
+	sq_quote_argv(&sb, state->git_apply_opts.argv);
 	write_state_text(state, "apply-opt", sb.buf);
 
 	if (state->rebasing)
@@ -1641,8 +1641,8 @@ static void do_commit(const struct am_state *state)
 		setenv("GIT_COMMITTER_DATE",
 			state->ignore_date ? "" : state->author_date, 1);
 
-	if (commit_tree(state->msg, state->msg_len, tree.hash, parents, commit.hash,
-				author, state->sign_commit))
+	if (commit_tree(state->msg, state->msg_len, &tree, parents, &commit,
+			author, state->sign_commit))
 		die(_("failed to write commit object"));
 
 	reflog_msg = getenv("GIT_REFLOG_ACTION");
diff --git a/builtin/cat-file.c b/builtin/cat-file.c
index f5fa4fd75a..cf9ea5c796 100644
--- a/builtin/cat-file.c
+++ b/builtin/cat-file.c
@@ -475,6 +475,8 @@ static int batch_objects(struct batch_options *opt)
 
 		for_each_loose_object(batch_loose_object, &sa, 0);
 		for_each_packed_object(batch_packed_object, &sa, 0);
+		if (repository_format_partial_clone)
+			warning("This repository has extensions.partialClone set. Some objects may not be loaded.");
 
 		cb.opt = opt;
 		cb.expand = &data;
diff --git a/builtin/checkout.c b/builtin/checkout.c
index c54c78df54..191b96c49c 100644
--- a/builtin/checkout.c
+++ b/builtin/checkout.c
@@ -227,8 +227,7 @@ static int checkout_merged(int pos, const struct checkout *state)
 	 * (it also writes the merge result to the object database even
 	 * when it may contain conflicts).
 	 */
-	if (write_sha1_file(result_buf.ptr, result_buf.size,
-			    blob_type, oid.hash))
+	if (write_object_file(result_buf.ptr, result_buf.size, blob_type, &oid))
 		die(_("Unable to add merge result for '%s'"), path);
 	free(result_buf.ptr);
 	ce = make_cache_entry(mode, oid.hash, path, 2, 0);
diff --git a/builtin/clone.c b/builtin/clone.c
index 284651797e..101c27a593 100644
--- a/builtin/clone.c
+++ b/builtin/clone.c
@@ -26,6 +26,7 @@
 #include "run-command.h"
 #include "connected.h"
 #include "packfile.h"
+#include "list-objects-filter-options.h"
 
 /*
  * Overall FIXMEs:
@@ -60,6 +61,7 @@ static struct string_list option_optional_reference = STRING_LIST_INIT_NODUP;
 static int option_dissociate;
 static int max_jobs = -1;
 static struct string_list option_recurse_submodules = STRING_LIST_INIT_NODUP;
+static struct list_objects_filter_options filter_options;
 
 static int recurse_submodules_cb(const struct option *opt,
 				 const char *arg, int unset)
@@ -135,6 +137,7 @@ static struct option builtin_clone_options[] = {
 			TRANSPORT_FAMILY_IPV4),
 	OPT_SET_INT('6', "ipv6", &family, N_("use IPv6 addresses only"),
 			TRANSPORT_FAMILY_IPV6),
+	OPT_PARSE_LIST_OBJECTS_FILTER(&filter_options),
 	OPT_END()
 };
 
@@ -893,6 +896,8 @@ int cmd_clone(int argc, const char **argv, const char *prefix)
 	struct refspec *refspec;
 	const char *fetch_pattern;
 
+	fetch_if_missing = 0;
+
 	packet_trace_identity("clone");
 	argc = parse_options(argc, argv, prefix, builtin_clone_options,
 			     builtin_clone_usage, 0);
@@ -1090,6 +1095,8 @@ int cmd_clone(int argc, const char **argv, const char *prefix)
 			warning(_("--shallow-since is ignored in local clones; use file:// instead."));
 		if (option_not.nr)
 			warning(_("--shallow-exclude is ignored in local clones; use file:// instead."));
+		if (filter_options.choice)
+			warning(_("--filter is ignored in local clones; use file:// instead."));
 		if (!access(mkpath("%s/shallow", path), F_OK)) {
 			if (option_local > 0)
 				warning(_("source repository is shallow, ignoring --local"));
@@ -1118,7 +1125,13 @@ int cmd_clone(int argc, const char **argv, const char *prefix)
 		transport_set_option(transport, TRANS_OPT_UPLOADPACK,
 				     option_upload_pack);
 
-	if (transport->smart_options && !deepen)
+	if (filter_options.choice) {
+		transport_set_option(transport, TRANS_OPT_LIST_OBJECTS_FILTER,
+				     filter_options.filter_spec);
+		transport_set_option(transport, TRANS_OPT_FROM_PROMISOR, "1");
+	}
+
+	if (transport->smart_options && !deepen && !filter_options.choice)
 		transport->smart_options->check_self_contained_and_connected = 1;
 
 	refs = transport_get_remote_refs(transport);
@@ -1178,13 +1191,17 @@ int cmd_clone(int argc, const char **argv, const char *prefix)
 	write_refspec_config(src_ref_prefix, our_head_points_at,
 			remote_head_points_at, &branch_top);
 
+	if (filter_options.choice)
+		partial_clone_register("origin", &filter_options);
+
 	if (is_local)
 		clone_local(path, git_dir);
 	else if (refs && complete_refs_before_fetch)
 		transport_fetch_refs(transport, mapped_refs);
 
 	update_remote_refs(refs, mapped_refs, remote_head_points_at,
-			   branch_top.buf, reflog_msg.buf, transport, !is_local);
+			   branch_top.buf, reflog_msg.buf, transport,
+			   !is_local && !filter_options.choice);
 
 	update_head(our_head_points_at, remote_head, reflog_msg.buf);
 
@@ -1205,6 +1222,7 @@ 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);
diff --git a/builtin/commit-tree.c b/builtin/commit-tree.c
index 2177251e24..e5bdf57b1e 100644
--- a/builtin/commit-tree.c
+++ b/builtin/commit-tree.c
@@ -117,8 +117,8 @@ int cmd_commit_tree(int argc, const char **argv, const char *prefix)
 			die_errno("git commit-tree: failed to read");
 	}
 
-	if (commit_tree(buffer.buf, buffer.len, tree_oid.hash, parents,
-			commit_oid.hash, NULL, sign_commit)) {
+	if (commit_tree(buffer.buf, buffer.len, &tree_oid, parents, &commit_oid,
+			NULL, sign_commit)) {
 		strbuf_release(&buffer);
 		return 1;
 	}
diff --git a/builtin/commit.c b/builtin/commit.c
index 4610e3d8e3..e8e8d13be4 100644
--- a/builtin/commit.c
+++ b/builtin/commit.c
@@ -31,9 +31,7 @@
 #include "gpg-interface.h"
 #include "column.h"
 #include "sequencer.h"
-#include "notes-utils.h"
 #include "mailmap.h"
-#include "sigchain.h"
 
 static const char * const builtin_commit_usage[] = {
 	N_("git commit [<options>] [--] <pathspec>..."),
@@ -45,31 +43,6 @@ static const char * const builtin_status_usage[] = {
 	NULL
 };
 
-static const char implicit_ident_advice_noconfig[] =
-N_("Your name and email address were configured automatically based\n"
-"on your username and hostname. Please check that they are accurate.\n"
-"You can suppress this message by setting them explicitly. Run the\n"
-"following command and follow the instructions in your editor to edit\n"
-"your configuration file:\n"
-"\n"
-"    git config --global --edit\n"
-"\n"
-"After doing this, you may fix the identity used for this commit with:\n"
-"\n"
-"    git commit --amend --reset-author\n");
-
-static const char implicit_ident_advice_config[] =
-N_("Your name and email address were configured automatically based\n"
-"on your username and hostname. Please check that they are accurate.\n"
-"You can suppress this message by setting them explicitly:\n"
-"\n"
-"    git config --global user.name \"Your Name\"\n"
-"    git config --global user.email you@example.com\n"
-"\n"
-"After doing this, you may fix the identity used for this commit with:\n"
-"\n"
-"    git commit --amend --reset-author\n");
-
 static const char empty_amend_advice[] =
 N_("You asked to amend the most recent commit, but doing so would make\n"
 "it empty. You can repeat your command with --allow-empty, or you can\n"
@@ -93,8 +66,6 @@ N_("If you wish to skip this commit, use:\n"
 "Then \"git cherry-pick --continue\" will resume cherry-picking\n"
 "the remaining commits.\n");
 
-static GIT_PATH_FUNC(git_path_commit_editmsg, "COMMIT_EDITMSG")
-
 static const char *use_message_buffer;
 static struct lock_file index_lock; /* real index */
 static struct lock_file false_lock; /* used only for partial commits */
@@ -128,12 +99,7 @@ static char *sign_commit;
  * if editor is used, and only the whitespaces if the message
  * is specified explicitly.
  */
-static enum {
-	CLEANUP_SPACE,
-	CLEANUP_NONE,
-	CLEANUP_SCISSORS,
-	CLEANUP_ALL
-} cleanup_mode;
+static enum commit_msg_cleanup_mode cleanup_mode;
 static const char *cleanup_arg;
 
 static enum commit_whence whence;
@@ -673,7 +639,7 @@ static int prepare_to_commit(const char *index_file, const char *prefix,
 	struct strbuf sb = STRBUF_INIT;
 	const char *hook_arg1 = NULL;
 	const char *hook_arg2 = NULL;
-	int clean_message_contents = (cleanup_mode != CLEANUP_NONE);
+	int clean_message_contents = (cleanup_mode != COMMIT_MSG_CLEANUP_NONE);
 	int old_display_comment_prefix;
 
 	/* This checks and barfs if author is badly specified */
@@ -814,7 +780,7 @@ static int prepare_to_commit(const char *index_file, const char *prefix,
 		struct ident_split ci, ai;
 
 		if (whence != FROM_COMMIT) {
-			if (cleanup_mode == CLEANUP_SCISSORS)
+			if (cleanup_mode == COMMIT_MSG_CLEANUP_SCISSORS)
 				wt_status_add_cut_line(s->fp);
 			status_printf_ln(s, GIT_COLOR_NORMAL,
 			    whence == FROM_MERGE
@@ -834,14 +800,15 @@ static int prepare_to_commit(const char *index_file, const char *prefix,
 		}
 
 		fprintf(s->fp, "\n");
-		if (cleanup_mode == CLEANUP_ALL)
+		if (cleanup_mode == COMMIT_MSG_CLEANUP_ALL)
 			status_printf(s, GIT_COLOR_NORMAL,
 				_("Please enter the commit message for your changes."
 				  " Lines starting\nwith '%c' will be ignored, and an empty"
 				  " message aborts the commit.\n"), comment_line_char);
-		else if (cleanup_mode == CLEANUP_SCISSORS && whence == FROM_COMMIT)
+		else if (cleanup_mode == COMMIT_MSG_CLEANUP_SCISSORS &&
+			 whence == FROM_COMMIT)
 			wt_status_add_cut_line(s->fp);
-		else /* CLEANUP_SPACE, that is. */
+		else /* COMMIT_MSG_CLEANUP_SPACE, that is. */
 			status_printf(s, GIT_COLOR_NORMAL,
 				_("Please enter the commit message for your changes."
 				  " Lines starting\n"
@@ -986,65 +953,6 @@ static int prepare_to_commit(const char *index_file, const char *prefix,
 	return 1;
 }
 
-static int rest_is_empty(struct strbuf *sb, int start)
-{
-	int i, eol;
-	const char *nl;
-
-	/* Check if the rest is just whitespace and Signed-off-by's. */
-	for (i = start; i < sb->len; i++) {
-		nl = memchr(sb->buf + i, '\n', sb->len - i);
-		if (nl)
-			eol = nl - sb->buf;
-		else
-			eol = sb->len;
-
-		if (strlen(sign_off_header) <= eol - i &&
-		    starts_with(sb->buf + i, sign_off_header)) {
-			i = eol;
-			continue;
-		}
-		while (i < eol)
-			if (!isspace(sb->buf[i++]))
-				return 0;
-	}
-
-	return 1;
-}
-
-/*
- * Find out if the message in the strbuf contains only whitespace and
- * Signed-off-by lines.
- */
-static int message_is_empty(struct strbuf *sb)
-{
-	if (cleanup_mode == CLEANUP_NONE && sb->len)
-		return 0;
-	return rest_is_empty(sb, 0);
-}
-
-/*
- * See if the user edited the message in the editor or left what
- * was in the template intact
- */
-static int template_untouched(struct strbuf *sb)
-{
-	struct strbuf tmpl = STRBUF_INIT;
-	const char *start;
-
-	if (cleanup_mode == CLEANUP_NONE && sb->len)
-		return 0;
-
-	if (!template_file || strbuf_read_file(&tmpl, template_file, 0) <= 0)
-		return 0;
-
-	strbuf_stripspace(&tmpl, cleanup_mode == CLEANUP_ALL);
-	if (!skip_prefix(sb->buf, tmpl.buf, &start))
-		start = sb->buf;
-	strbuf_release(&tmpl);
-	return rest_is_empty(sb, start - sb->buf);
-}
-
 static const char *find_author_by_nickname(const char *name)
 {
 	struct rev_info revs;
@@ -1229,15 +1137,17 @@ static int parse_and_validate_options(int argc, const char *argv[],
 	if (argc == 0 && (also || (only && !amend && !allow_empty)))
 		die(_("No paths with --include/--only does not make sense."));
 	if (!cleanup_arg || !strcmp(cleanup_arg, "default"))
-		cleanup_mode = use_editor ? CLEANUP_ALL : CLEANUP_SPACE;
+		cleanup_mode = use_editor ? COMMIT_MSG_CLEANUP_ALL :
+					    COMMIT_MSG_CLEANUP_SPACE;
 	else if (!strcmp(cleanup_arg, "verbatim"))
-		cleanup_mode = CLEANUP_NONE;
+		cleanup_mode = COMMIT_MSG_CLEANUP_NONE;
 	else if (!strcmp(cleanup_arg, "whitespace"))
-		cleanup_mode = CLEANUP_SPACE;
+		cleanup_mode = COMMIT_MSG_CLEANUP_SPACE;
 	else if (!strcmp(cleanup_arg, "strip"))
-		cleanup_mode = CLEANUP_ALL;
+		cleanup_mode = COMMIT_MSG_CLEANUP_ALL;
 	else if (!strcmp(cleanup_arg, "scissors"))
-		cleanup_mode = use_editor ? CLEANUP_SCISSORS : CLEANUP_SPACE;
+		cleanup_mode = use_editor ? COMMIT_MSG_CLEANUP_SCISSORS :
+					    COMMIT_MSG_CLEANUP_SPACE;
 	else
 		die(_("Invalid cleanup mode %s"), cleanup_arg);
 
@@ -1439,98 +1349,6 @@ int cmd_status(int argc, const char **argv, const char *prefix)
 	return 0;
 }
 
-static const char *implicit_ident_advice(void)
-{
-	char *user_config = expand_user_path("~/.gitconfig", 0);
-	char *xdg_config = xdg_config_home("config");
-	int config_exists = file_exists(user_config) || file_exists(xdg_config);
-
-	free(user_config);
-	free(xdg_config);
-
-	if (config_exists)
-		return _(implicit_ident_advice_config);
-	else
-		return _(implicit_ident_advice_noconfig);
-
-}
-
-static void print_summary(const char *prefix, const struct object_id *oid,
-			  int initial_commit)
-{
-	struct rev_info rev;
-	struct commit *commit;
-	struct strbuf format = STRBUF_INIT;
-	const char *head;
-	struct pretty_print_context pctx = {0};
-	struct strbuf author_ident = STRBUF_INIT;
-	struct strbuf committer_ident = STRBUF_INIT;
-
-	commit = lookup_commit(oid);
-	if (!commit)
-		die(_("couldn't look up newly created commit"));
-	if (parse_commit(commit))
-		die(_("could not parse newly created commit"));
-
-	strbuf_addstr(&format, "format:%h] %s");
-
-	format_commit_message(commit, "%an <%ae>", &author_ident, &pctx);
-	format_commit_message(commit, "%cn <%ce>", &committer_ident, &pctx);
-	if (strbuf_cmp(&author_ident, &committer_ident)) {
-		strbuf_addstr(&format, "\n Author: ");
-		strbuf_addbuf_percentquote(&format, &author_ident);
-	}
-	if (author_date_is_interesting()) {
-		struct strbuf date = STRBUF_INIT;
-		format_commit_message(commit, "%ad", &date, &pctx);
-		strbuf_addstr(&format, "\n Date: ");
-		strbuf_addbuf_percentquote(&format, &date);
-		strbuf_release(&date);
-	}
-	if (!committer_ident_sufficiently_given()) {
-		strbuf_addstr(&format, "\n Committer: ");
-		strbuf_addbuf_percentquote(&format, &committer_ident);
-		if (advice_implicit_identity) {
-			strbuf_addch(&format, '\n');
-			strbuf_addstr(&format, implicit_ident_advice());
-		}
-	}
-	strbuf_release(&author_ident);
-	strbuf_release(&committer_ident);
-
-	init_revisions(&rev, prefix);
-	setup_revisions(0, NULL, &rev, NULL);
-
-	rev.diff = 1;
-	rev.diffopt.output_format =
-		DIFF_FORMAT_SHORTSTAT | DIFF_FORMAT_SUMMARY;
-
-	rev.verbose_header = 1;
-	rev.show_root_diff = 1;
-	get_commit_format(format.buf, &rev);
-	rev.always_show_header = 0;
-	rev.diffopt.detect_rename = DIFF_DETECT_RENAME;
-	rev.diffopt.break_opt = 0;
-	diff_setup_done(&rev.diffopt);
-
-	head = resolve_ref_unsafe("HEAD", 0, NULL, NULL);
-	if (!head)
-		die_errno(_("unable to resolve HEAD after creating commit"));
-	if (!strcmp(head, "HEAD"))
-		head = _("detached HEAD");
-	else
-		skip_prefix(head, "refs/heads/", &head);
-	printf("[%s%s ", head, initial_commit ? _(" (root-commit)") : "");
-
-	if (!log_tree_commit(&rev, commit)) {
-		rev.always_show_header = 1;
-		rev.use_terminator = 1;
-		log_tree_commit(&rev, commit);
-	}
-
-	strbuf_release(&format);
-}
-
 static int git_commit_config(const char *k, const char *v, void *cb)
 {
 	struct wt_status *s = cb;
@@ -1560,37 +1378,6 @@ static int git_commit_config(const char *k, const char *v, void *cb)
 	return git_status_config(k, v, s);
 }
 
-static int run_rewrite_hook(const struct object_id *oldoid,
-			    const struct object_id *newoid)
-{
-	struct child_process proc = CHILD_PROCESS_INIT;
-	const char *argv[3];
-	int code;
-	struct strbuf sb = STRBUF_INIT;
-
-	argv[0] = find_hook("post-rewrite");
-	if (!argv[0])
-		return 0;
-
-	argv[1] = "amend";
-	argv[2] = NULL;
-
-	proc.argv = argv;
-	proc.in = -1;
-	proc.stdout_to_stderr = 1;
-
-	code = start_command(&proc);
-	if (code)
-		return code;
-	strbuf_addf(&sb, "%s %s\n", oid_to_hex(oldoid), oid_to_hex(newoid));
-	sigchain_push(SIGPIPE, SIG_IGN);
-	write_in_full(proc.in, sb.buf, sb.len);
-	close(proc.in);
-	strbuf_release(&sb);
-	sigchain_pop(SIGPIPE);
-	return finish_command(&proc);
-}
-
 int run_commit_hook(int editor_is_used, const char *index_file, const char *name, ...)
 {
 	struct argv_array hook_env = ARGV_ARRAY_INIT;
@@ -1673,13 +1460,11 @@ int cmd_commit(int argc, const char **argv, const char *prefix)
 	struct strbuf sb = STRBUF_INIT;
 	struct strbuf author_ident = STRBUF_INIT;
 	const char *index_file, *reflog_msg;
-	char *nl;
 	struct object_id oid;
 	struct commit_list *parents = NULL;
 	struct stat statbuf;
 	struct commit *current_head = NULL;
 	struct commit_extra_header *extra = NULL;
-	struct ref_transaction *transaction;
 	struct strbuf err = STRBUF_INIT;
 
 	if (argc == 2 && !strcmp(argv[1], "-h"))
@@ -1770,17 +1555,17 @@ int cmd_commit(int argc, const char **argv, const char *prefix)
 	}
 
 	if (verbose || /* Truncate the message just before the diff, if any. */
-	    cleanup_mode == CLEANUP_SCISSORS)
+	    cleanup_mode == COMMIT_MSG_CLEANUP_SCISSORS)
 		strbuf_setlen(&sb, wt_status_locate_end(sb.buf, sb.len));
-	if (cleanup_mode != CLEANUP_NONE)
-		strbuf_stripspace(&sb, cleanup_mode == CLEANUP_ALL);
+	if (cleanup_mode != COMMIT_MSG_CLEANUP_NONE)
+		strbuf_stripspace(&sb, cleanup_mode == COMMIT_MSG_CLEANUP_ALL);
 
-	if (message_is_empty(&sb) && !allow_empty_message) {
+	if (message_is_empty(&sb, cleanup_mode) && !allow_empty_message) {
 		rollback_index_files();
 		fprintf(stderr, _("Aborting commit due to empty commit message.\n"));
 		exit(1);
 	}
-	if (template_untouched(&sb) && !allow_empty_message) {
+	if (template_untouched(&sb, template_file, cleanup_mode) && !allow_empty_message) {
 		rollback_index_files();
 		fprintf(stderr, _("Aborting commit; you did not edit the message.\n"));
 		exit(1);
@@ -1794,33 +1579,20 @@ int cmd_commit(int argc, const char **argv, const char *prefix)
 		append_merge_tag_headers(parents, &tail);
 	}
 
-	if (commit_tree_extended(sb.buf, sb.len, active_cache_tree->oid.hash,
-			 parents, oid.hash, author_ident.buf, sign_commit, extra)) {
+	if (commit_tree_extended(sb.buf, sb.len, &active_cache_tree->oid,
+				 parents, &oid, author_ident.buf, sign_commit,
+				 extra)) {
 		rollback_index_files();
 		die(_("failed to write commit object"));
 	}
 	strbuf_release(&author_ident);
 	free_commit_extra_headers(extra);
 
-	nl = strchr(sb.buf, '\n');
-	if (nl)
-		strbuf_setlen(&sb, nl + 1 - sb.buf);
-	else
-		strbuf_addch(&sb, '\n');
-	strbuf_insert(&sb, 0, reflog_msg, strlen(reflog_msg));
-	strbuf_insert(&sb, strlen(reflog_msg), ": ", 2);
-
-	transaction = ref_transaction_begin(&err);
-	if (!transaction ||
-	    ref_transaction_update(transaction, "HEAD", &oid,
-				   current_head
-				   ? &current_head->object.oid : &null_oid,
-				   0, sb.buf, &err) ||
-	    ref_transaction_commit(transaction, &err)) {
+	if (update_head_with_reflog(current_head, &oid, reflog_msg, &sb,
+				    &err)) {
 		rollback_index_files();
 		die("%s", err.buf);
 	}
-	ref_transaction_free(transaction);
 
 	unlink(git_path_cherry_pick_head());
 	unlink(git_path_revert_head());
@@ -1837,17 +1609,17 @@ int cmd_commit(int argc, const char **argv, const char *prefix)
 	rerere(0);
 	run_commit_hook(use_editor, get_index_file(), "post-commit", NULL);
 	if (amend && !no_post_rewrite) {
-		struct notes_rewrite_cfg *cfg;
-		cfg = init_copy_notes_for_rewrite("amend");
-		if (cfg) {
-			/* we are amending, so current_head is not NULL */
-			copy_note_for_rewrite(cfg, &current_head->object.oid, &oid);
-			finish_copy_notes_for_rewrite(cfg, "Notes added by 'git commit --amend'");
-		}
-		run_rewrite_hook(&current_head->object.oid, &oid);
+		commit_post_rewrite(current_head, &oid);
+	}
+	if (!quiet) {
+		unsigned int flags = 0;
+
+		if (!current_head)
+			flags |= SUMMARY_INITIAL_COMMIT;
+		if (author_date_is_interesting())
+			flags |= SUMMARY_SHOW_AUTHOR_DATE;
+		print_commit_summary(prefix, &oid, flags);
 	}
-	if (!quiet)
-		print_summary(prefix, &oid, !current_head);
 
 	UNLEAK(err);
 	UNLEAK(sb);
diff --git a/builtin/describe.c b/builtin/describe.c
index 6fe1c51281..c428984706 100644
--- a/builtin/describe.c
+++ b/builtin/describe.c
@@ -383,7 +383,7 @@ static void describe_commit(struct object_id *oid, struct strbuf *dst)
 	if (!match_cnt) {
 		struct object_id *cmit_oid = &cmit->object.oid;
 		if (always) {
-			strbuf_addstr(dst, find_unique_abbrev(cmit_oid->hash, abbrev));
+			strbuf_add_unique_abbrev(dst, cmit_oid->hash, abbrev);
 			if (suffix)
 				strbuf_addstr(dst, suffix);
 			return;
diff --git a/builtin/fetch-pack.c b/builtin/fetch-pack.c
index 366b9d13f9..a7bc1366ab 100644
--- a/builtin/fetch-pack.c
+++ b/builtin/fetch-pack.c
@@ -53,6 +53,8 @@ int cmd_fetch_pack(int argc, const char **argv, const char *prefix)
 	struct oid_array shallow = OID_ARRAY_INIT;
 	struct string_list deepen_not = STRING_LIST_INIT_DUP;
 
+	fetch_if_missing = 0;
+
 	packet_trace_identity("fetch-pack");
 
 	memset(&args, 0, sizeof(args));
@@ -143,6 +145,22 @@ int cmd_fetch_pack(int argc, const char **argv, const char *prefix)
 			args.update_shallow = 1;
 			continue;
 		}
+		if (!strcmp("--from-promisor", arg)) {
+			args.from_promisor = 1;
+			continue;
+		}
+		if (!strcmp("--no-dependents", arg)) {
+			args.no_dependents = 1;
+			continue;
+		}
+		if (skip_prefix(arg, ("--" CL_ARG__FILTER "="), &arg)) {
+			parse_list_objects_filter(&args.filter_options, arg);
+			continue;
+		}
+		if (!strcmp(arg, ("--no-" CL_ARG__FILTER))) {
+			list_objects_filter_set_no_filter(&args.filter_options);
+			continue;
+		}
 		usage(fetch_pack_usage);
 	}
 	if (deepen_not.nr)
diff --git a/builtin/fetch.c b/builtin/fetch.c
index 7bbcd26faf..8ee998ea2e 100644
--- a/builtin/fetch.c
+++ b/builtin/fetch.c
@@ -19,6 +19,7 @@
 #include "argv-array.h"
 #include "utf8.h"
 #include "packfile.h"
+#include "list-objects-filter-options.h"
 
 static const char * const builtin_fetch_usage[] = {
 	N_("git fetch [<options>] [<repository> [<refspec>...]]"),
@@ -56,6 +57,7 @@ static int recurse_submodules_default = RECURSE_SUBMODULES_ON_DEMAND;
 static int shown_url = 0;
 static int refmap_alloc, refmap_nr;
 static const char **refmap_array;
+static struct list_objects_filter_options filter_options;
 
 static int git_fetch_config(const char *k, const char *v, void *cb)
 {
@@ -161,6 +163,7 @@ static struct option builtin_fetch_options[] = {
 			TRANSPORT_FAMILY_IPV4),
 	OPT_SET_INT('6', "ipv6", &family, N_("use IPv6 addresses only"),
 			TRANSPORT_FAMILY_IPV6),
+	OPT_PARSE_LIST_OBJECTS_FILTER(&filter_options),
 	OPT_END()
 };
 
@@ -1045,6 +1048,11 @@ static struct transport *prepare_transport(struct remote *remote, int deepen)
 		set_option(transport, TRANS_OPT_DEEPEN_RELATIVE, "yes");
 	if (update_shallow)
 		set_option(transport, TRANS_OPT_UPDATE_SHALLOW, "yes");
+	if (filter_options.choice) {
+		set_option(transport, TRANS_OPT_LIST_OBJECTS_FILTER,
+			   filter_options.filter_spec);
+		set_option(transport, TRANS_OPT_FROM_PROMISOR, "1");
+	}
 	return transport;
 }
 
@@ -1265,6 +1273,56 @@ static int fetch_multiple(struct string_list *list)
 	return result;
 }
 
+/*
+ * Fetching from the promisor remote should use the given filter-spec
+ * or inherit the default filter-spec from the config.
+ */
+static inline void fetch_one_setup_partial(struct remote *remote)
+{
+	/*
+	 * Explicit --no-filter argument overrides everything, regardless
+	 * of any prior partial clones and fetches.
+	 */
+	if (filter_options.no_filter)
+		return;
+
+	/*
+	 * If no prior partial clone/fetch and the current fetch DID NOT
+	 * request a partial-fetch, do a normal fetch.
+	 */
+	if (!repository_format_partial_clone && !filter_options.choice)
+		return;
+
+	/*
+	 * If this is the FIRST partial-fetch request, we enable partial
+	 * on this repo and remember the given filter-spec as the default
+	 * for subsequent fetches to this remote.
+	 */
+	if (!repository_format_partial_clone && filter_options.choice) {
+		partial_clone_register(remote->name, &filter_options);
+		return;
+	}
+
+	/*
+	 * We are currently limited to only ONE promisor remote and only
+	 * allow partial-fetches from the promisor remote.
+	 */
+	if (strcmp(remote->name, repository_format_partial_clone)) {
+		if (filter_options.choice)
+			die(_("--filter can only be used with the remote configured in core.partialClone"));
+		return;
+	}
+
+	/*
+	 * Do a partial-fetch from the promisor remote using either the
+	 * explicitly given filter-spec or inherit the filter-spec from
+	 * the config.
+	 */
+	if (!filter_options.choice)
+		partial_clone_get_default_filter_spec(&filter_options);
+	return;
+}
+
 static int fetch_one(struct remote *remote, int argc, const char **argv)
 {
 	static const char **refs = NULL;
@@ -1320,12 +1378,14 @@ int cmd_fetch(int argc, const char **argv, const char *prefix)
 {
 	int i;
 	struct string_list list = STRING_LIST_INIT_DUP;
-	struct remote *remote;
+	struct remote *remote = NULL;
 	int result = 0;
 	struct argv_array argv_gc_auto = ARGV_ARRAY_INIT;
 
 	packet_trace_identity("fetch");
 
+	fetch_if_missing = 0;
+
 	/* Record the command line for the reflog */
 	strbuf_addstr(&default_rla, "fetch");
 	for (i = 1; i < argc; i++)
@@ -1359,23 +1419,23 @@ int cmd_fetch(int argc, const char **argv, const char *prefix)
 	if (depth || deepen_since || deepen_not.nr)
 		deepen = 1;
 
+	if (filter_options.choice && !repository_format_partial_clone)
+		die("--filter can only be used when extensions.partialClone is set");
+
 	if (all) {
 		if (argc == 1)
 			die(_("fetch --all does not take a repository argument"));
 		else if (argc > 1)
 			die(_("fetch --all does not make sense with refspecs"));
 		(void) for_each_remote(get_one_remote_for_fetch, &list);
-		result = fetch_multiple(&list);
 	} else if (argc == 0) {
 		/* No arguments -- use default remote */
 		remote = remote_get(NULL);
-		result = fetch_one(remote, argc, argv);
 	} else if (multiple) {
 		/* All arguments are assumed to be remotes or groups */
 		for (i = 0; i < argc; i++)
 			if (!add_remote_or_group(argv[i], &list))
 				die(_("No such remote or remote group: %s"), argv[i]);
-		result = fetch_multiple(&list);
 	} else {
 		/* Single remote or group */
 		(void) add_remote_or_group(argv[0], &list);
@@ -1383,14 +1443,25 @@ int cmd_fetch(int argc, const char **argv, const char *prefix)
 			/* More than one remote */