1 files changed, 110 insertions, 68 deletions

diff --git a/builtin/clone.c b/builtin/clone.c
index 430307b298..957246723e 100644
--- a/builtin/clone.c
+++ b/builtin/clone.c
@@ -9,6 +9,7 @@
  */
 
 #include "builtin.h"
+#include "lockfile.h"
 #include "parse-options.h"
 #include "fetch-pack.h"
 #include "refs.h"
@@ -33,7 +34,7 @@
  *
  */
 static const char * const builtin_clone_usage[] = {
-	N_("git clone [options] [--] <repo> [<dir>]"),
+	N_("git clone [<options>] [--] <repo> [<dir>]"),
 	NULL
 };
 
@@ -48,6 +49,7 @@ static int option_verbosity;
 static int option_progress = -1;
 static struct string_list option_config;
 static struct string_list option_reference;
+static int option_dissociate;
 
 static int opt_parse_reference(const struct option *opt, const char *arg, int unset)
 {
@@ -62,23 +64,22 @@ static struct option builtin_clone_options[] = {
 	OPT__VERBOSITY(&option_verbosity),
 	OPT_BOOL(0, "progress", &option_progress,
 		 N_("force progress reporting")),
-	OPT_BOOLEAN('n', "no-checkout", &option_no_checkout,
-		    N_("don't create a checkout")),
-	OPT_BOOLEAN(0, "bare", &option_bare, N_("create a bare repository")),
-	{ OPTION_BOOLEAN, 0, "naked", &option_bare, NULL,
-		N_("create a bare repository"),
-		PARSE_OPT_NOARG | PARSE_OPT_HIDDEN },
-	OPT_BOOLEAN(0, "mirror", &option_mirror,
-		    N_("create a mirror repository (implies bare)")),
+	OPT_BOOL('n', "no-checkout", &option_no_checkout,
+		 N_("don't create a checkout")),
+	OPT_BOOL(0, "bare", &option_bare, N_("create a bare repository")),
+	OPT_HIDDEN_BOOL(0, "naked", &option_bare,
+			N_("create a bare repository")),
+	OPT_BOOL(0, "mirror", &option_mirror,
+		 N_("create a mirror repository (implies bare)")),
 	OPT_BOOL('l', "local", &option_local,
 		N_("to clone from a local repository")),
-	OPT_BOOLEAN(0, "no-hardlinks", &option_no_hardlinks,
+	OPT_BOOL(0, "no-hardlinks", &option_no_hardlinks,
 		    N_("don't use local hardlinks, always copy")),
-	OPT_BOOLEAN('s', "shared", &option_shared,
+	OPT_BOOL('s', "shared", &option_shared,
 		    N_("setup as shared repository")),
-	OPT_BOOLEAN(0, "recursive", &option_recursive,
+	OPT_BOOL(0, "recursive", &option_recursive,
 		    N_("initialize submodules in the clone")),
-	OPT_BOOLEAN(0, "recurse-submodules", &option_recursive,
+	OPT_BOOL(0, "recurse-submodules", &option_recursive,
 		    N_("initialize submodules in the clone")),
 	OPT_STRING(0, "template", &option_template, N_("template-directory"),
 		   N_("directory from which templates will be used")),
@@ -94,6 +95,8 @@ static struct option builtin_clone_options[] = {
 		    N_("create a shallow clone of that depth")),
 	OPT_BOOL(0, "single-branch", &option_single_branch,
 		    N_("clone only one branch, HEAD or --branch")),
+	OPT_BOOL(0, "dissociate", &option_dissociate,
+		 N_("use --reference only while cloning")),
 	OPT_STRING(0, "separate-git-dir", &real_git_dir, N_("gitdir"),
 		   N_("separate git dir from working tree")),
 	OPT_STRING_LIST('c', "config", &option_config, N_("key=value"),
@@ -253,6 +256,12 @@ static int add_one_reference(struct string_list_item *item, void *cb_data)
 		die(_("reference repository '%s' is not a local repository."),
 		    item->string);
 
+	if (!access(mkpath("%s/shallow", ref_git), F_OK))
+		die(_("reference repository '%s' is shallow"), item->string);
+
+	if (!access(mkpath("%s/info/grafts", ref_git), F_OK))
+		die(_("reference repository '%s' is grafted"), item->string);
+
 	strbuf_addf(&alternate, "%s/objects", ref_git);
 	add_to_alternates_file(alternate.buf);
 	strbuf_release(&alternate);
@@ -380,12 +389,11 @@ static void clone_local(const char *src_repo, const char *dest_repo)
 	}
 
 	if (0 <= option_verbosity)
-		printf(_("done.\n"));
+		fprintf(stderr, _("done.\n"));
 }
 
 static const char *junk_work_tree;
 static const char *junk_git_dir;
-static pid_t junk_pid;
 static enum {
 	JUNK_LEAVE_NONE,
 	JUNK_LEAVE_REPO,
@@ -412,8 +420,6 @@ static void remove_junk(void)
 		break;
 	}
 
-	if (getpid() != junk_pid)
-		return;
 	if (junk_git_dir) {
 		strbuf_addstr(&sb, junk_git_dir);
 		remove_dir_recursively(&sb, 0);
@@ -509,14 +515,14 @@ static void write_followtags(const struct ref *refs, const char *msg)
 {
 	const struct ref *ref;
 	for (ref = refs; ref; ref = ref->next) {
-		if (prefixcmp(ref->name, "refs/tags/"))
+		if (!starts_with(ref->name, "refs/tags/"))
 			continue;
-		if (!suffixcmp(ref->name, "^{}"))
+		if (ends_with(ref->name, "^{}"))
 			continue;
 		if (!has_sha1_file(ref->old_sha1))
 			continue;
 		update_ref(msg, ref->name, ref->old_sha1,
-			   NULL, 0, DIE_ON_ERR);
+			   NULL, 0, UPDATE_REFS_DIE_ON_ERR);
 	}
 }
 
@@ -551,13 +557,13 @@ static void update_remote_refs(const struct ref *refs,
 	const struct ref *rm = mapped_refs;
 
 	if (check_connectivity) {
-		if (0 <= option_verbosity)
-			printf(_("Checking connectivity... "));
+		if (transport->progress)
+			fprintf(stderr, _("Checking connectivity... "));
 		if (check_everything_connected_with_transport(iterate_ref_map,
 							      0, &rm, transport))
 			die(_("remote did not send all necessary objects"));
-		if (0 <= option_verbosity)
-			printf(_("done\n"));
+		if (transport->progress)
+			fprintf(stderr, _("done.\n"));
 	}
 
 	if (refs) {
@@ -579,19 +585,20 @@ static void update_remote_refs(const struct ref *refs,
 static void update_head(const struct ref *our, const struct ref *remote,
 			const char *msg)
 {
-	if (our && !prefixcmp(our->name, "refs/heads/")) {
+	const char *head;
+	if (our && skip_prefix(our->name, "refs/heads/", &head)) {
 		/* Local default branch link */
 		create_symref("HEAD", our->name, NULL);
 		if (!option_bare) {
-			const char *head = skip_prefix(our->name, "refs/heads/");
-			update_ref(msg, "HEAD", our->old_sha1, NULL, 0, DIE_ON_ERR);
+			update_ref(msg, "HEAD", our->old_sha1, NULL, 0,
+				   UPDATE_REFS_DIE_ON_ERR);
 			install_branch_config(0, head, option_origin, our->name);
 		}
 	} else if (our) {
 		struct commit *c = lookup_commit_reference(our->old_sha1);
 		/* --branch specifies a non-branch (i.e. tags), detach HEAD */
 		update_ref(msg, "HEAD", c->object.sha1,
-			   NULL, REF_NODEREF, DIE_ON_ERR);
+			   NULL, REF_NODEREF, UPDATE_REFS_DIE_ON_ERR);
 	} else if (remote) {
 		/*
 		 * We know remote HEAD points to a non-branch, or
@@ -599,7 +606,7 @@ static void update_head(const struct ref *our, const struct ref *remote,
 		 * Detach HEAD in all these cases.
 		 */
 		update_ref(msg, "HEAD", remote->old_sha1,
-			   NULL, REF_NODEREF, DIE_ON_ERR);
+			   NULL, REF_NODEREF, UPDATE_REFS_DIE_ON_ERR);
 	}
 }
 
@@ -611,12 +618,12 @@ static int checkout(void)
 	struct unpack_trees_options opts;
 	struct tree *tree;
 	struct tree_desc t;
-	int err = 0, fd;
+	int err = 0;
 
 	if (option_no_checkout)
 		return 0;
 
-	head = resolve_refdup("HEAD", sha1, 1, NULL);
+	head = resolve_refdup("HEAD", RESOLVE_REF_READING, sha1, NULL);
 	if (!head) {
 		warning(_("remote HEAD refers to nonexistent ref, "
 			  "unable to checkout.\n"));
@@ -626,7 +633,7 @@ static int checkout(void)
 		if (advice_detached_head)
 			detach_advice(sha1_to_hex(sha1));
 	} else {
-		if (prefixcmp(head, "refs/heads/"))
+		if (!starts_with(head, "refs/heads/"))
 			die(_("HEAD not found below refs/heads!"));
 	}
 	free(head);
@@ -635,7 +642,7 @@ static int checkout(void)
 	setup_work_tree();
 
 	lock_file = xcalloc(1, sizeof(struct lock_file));
-	fd = hold_locked_index(lock_file, 1);
+	hold_locked_index(lock_file, 1);
 
 	memset(&opts, 0, sizeof opts);
 	opts.update = 1;
@@ -651,12 +658,11 @@ static int checkout(void)
 	if (unpack_trees(1, &t, &opts) < 0)
 		die(_("unable to checkout working tree"));
 
-	if (write_cache(fd, active_cache, active_nr) ||
-	    commit_locked_index(lock_file))
+	if (write_locked_index(&the_index, lock_file, COMMIT_LOCK))
 		die(_("unable to write new index file"));
 
-	err |= run_hook(NULL, "post-checkout", sha1_to_hex(null_sha1),
-			sha1_to_hex(sha1), "1", NULL);
+	err |= run_hook_le(NULL, "post-checkout", sha1_to_hex(null_sha1),
+			   sha1_to_hex(sha1), "1", NULL);
 
 	if (!err && option_recursive)
 		err = run_command_v_opt(argv_submodule, RUN_GIT_CMD);
@@ -680,9 +686,10 @@ static void write_config(struct string_list *config)
 	}
 }
 
-static void write_refspec_config(const char* src_ref_prefix,
-		const struct ref* our_head_points_at,
-		const struct ref* remote_head_points_at, struct strbuf* branch_top)
+static void write_refspec_config(const char *src_ref_prefix,
+		const struct ref *our_head_points_at,
+		const struct ref *remote_head_points_at,
+		struct strbuf *branch_top)
 {
 	struct strbuf key = STRBUF_INIT;
 	struct strbuf value = STRBUF_INIT;
@@ -690,16 +697,19 @@ static void write_refspec_config(const char* src_ref_prefix,
 	if (option_mirror || !option_bare) {
 		if (option_single_branch && !option_mirror) {
 			if (option_branch) {
-				if (strstr(our_head_points_at->name, "refs/tags/"))
+				if (starts_with(our_head_points_at->name, "refs/tags/"))
 					strbuf_addf(&value, "+%s:%s", our_head_points_at->name,
 						our_head_points_at->name);
 				else
 					strbuf_addf(&value, "+%s:%s%s", our_head_points_at->name,
 						branch_top->buf, option_branch);
 			} else if (remote_head_points_at) {
+				const char *head = remote_head_points_at->name;
+				if (!skip_prefix(head, "refs/heads/", &head))
+					die("BUG: remote HEAD points at non-head?");
+
 				strbuf_addf(&value, "+%s:%s%s", remote_head_points_at->name,
-						branch_top->buf,
-						skip_prefix(remote_head_points_at->name, "refs/heads/"));
+						branch_top->buf, head);
 			}
 			/*
 			 * otherwise, the next "git fetch" will
@@ -728,6 +738,16 @@ static void write_refspec_config(const char* src_ref_prefix,
 	strbuf_release(&value);
 }
 
+static void dissociate_from_references(void)
+{
+	static const char* argv[] = { "repack", "-a", "-d", NULL };
+
+	if (run_command_v_opt(argv, RUN_GIT_CMD|RUN_COMMAND_NO_STDIN))
+		die(_("cannot repack to clean up"));
+	if (unlink(git_path("objects/info/alternates")) && errno != ENOENT)
+		die_errno(_("cannot unlink temporary alternates file"));
+}
+
 int cmd_clone(int argc, const char **argv, const char *prefix)
 {
 	int is_bundle = 0, is_local;
@@ -750,8 +770,6 @@ int cmd_clone(int argc, const char **argv, const char *prefix)
 	struct refspec *refspec;
 	const char *fetch_pattern;
 
-	junk_pid = getpid();
-
 	packet_trace_identity("clone");
 	argc = parse_options(argc, argv, prefix, builtin_clone_options,
 			     builtin_clone_usage, 0);
@@ -791,11 +809,10 @@ int cmd_clone(int argc, const char **argv, const char *prefix)
 		die(_("repository '%s' does not exist"), repo_name);
 	else
 		repo = repo_name;
-	is_local = option_local != 0 && path && !is_bundle;
-	if (is_local && option_depth)
-		warning(_("--depth is ignored in local clones; use file:// instead."));
-	if (option_local > 0 && !is_local)
-		warning(_("--local is ignored"));
+
+	/* no need to be strict, transport_set_option() will validate it again */
+	if (option_depth && atoi(option_depth) < 1)
+		die(_("depth %s is not a positive number"), option_depth);
 
 	if (argc == 2)
 		dir = xstrdup(argv[1]);
@@ -850,9 +867,9 @@ int cmd_clone(int argc, const char **argv, const char *prefix)
 
 	if (0 <= option_verbosity) {
 		if (option_bare)
-			printf(_("Cloning into bare repository '%s'...\n"), dir);
+			fprintf(stderr, _("Cloning into bare repository '%s'...\n"), dir);
 		else
-			printf(_("Cloning into '%s'...\n"), dir);
+			fprintf(stderr, _("Cloning into '%s'...\n"), dir);
 	}
 	init_db(option_template, INIT_DB_QUIET);
 	write_config(&option_config);
@@ -876,6 +893,10 @@ int cmd_clone(int argc, const char **argv, const char *prefix)
 
 	if (option_reference.nr)
 		setup_reference();
+	else if (option_dissociate) {
+		warning(_("--dissociate given, but there is no --reference"));
+		option_dissociate = 0;
+	}
 
 	fetch_pattern = value.buf;
 	refspec = parse_fetch_refspec(1, &fetch_pattern);
@@ -884,28 +905,40 @@ int cmd_clone(int argc, const char **argv, const char *prefix)
 
 	remote = remote_get(option_origin);
 	transport = transport_get(remote, remote->url[0]);
+	path = get_repo_path(remote->url[0], &is_bundle);
+	is_local = option_local != 0 && path && !is_bundle;
+	if (is_local) {
+		if (option_depth)
+			warning(_("--depth 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"));
+			is_local = 0;
+		}
+	}
+	if (option_local > 0 && !is_local)
+		warning(_("--local is ignored"));
+	transport->cloning = 1;
 
-	if (!is_local) {
-		if (!transport->get_refs_list || !transport->fetch)
-			die(_("Don't know how to clone %s"), transport->url);
+	if (!transport->get_refs_list || (!is_local && !transport->fetch))
+		die(_("Don't know how to clone %s"), transport->url);
 
-		transport_set_option(transport, TRANS_OPT_KEEP, "yes");
+	transport_set_option(transport, TRANS_OPT_KEEP, "yes");
 
-		if (option_depth)
-			transport_set_option(transport, TRANS_OPT_DEPTH,
-					     option_depth);
-		if (option_single_branch)
-			transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, "1");
+	if (option_depth)
+		transport_set_option(transport, TRANS_OPT_DEPTH,
+				     option_depth);
+	if (option_single_branch)
+		transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, "1");
 
-		transport_set_verbosity(transport, option_verbosity, option_progress);
+	transport_set_verbosity(transport, option_verbosity, option_progress);
 
-		if (option_upload_pack)
-			transport_set_option(transport, TRANS_OPT_UPLOADPACK,
-					     option_upload_pack);
+	if (option_upload_pack)
+		transport_set_option(transport, TRANS_OPT_UPLOADPACK,
+				     option_upload_pack);
 
-		if (transport->smart_options && !option_depth)
-			transport->smart_options->check_self_contained_and_connected = 1;
-	}
+	if (transport->smart_options && !option_depth)
+		transport->smart_options->check_self_contained_and_connected = 1;
 
 	refs = transport_get_remote_refs(transport);
 
@@ -946,6 +979,10 @@ int cmd_clone(int argc, const char **argv, const char *prefix)
 			our_head_points_at = remote_head_points_at;
 	}
 	else {
+		if (option_branch)
+			die(_("Remote branch %s not found in upstream %s"),
+					option_branch, option_origin);
+
 		warning(_("You appear to have cloned an empty repository."));
 		mapped_refs = NULL;
 		our_head_points_at = NULL;
@@ -973,6 +1010,9 @@ int cmd_clone(int argc, const char **argv, const char *prefix)
 	transport_unlock_pack(transport);
 	transport_disconnect(transport);
 
+	if (option_dissociate)
+		dissociate_from_references();
+
 	junk_mode = JUNK_LEAVE_REPO;
 	err = checkout();
 
@@ -981,5 +1021,7 @@ int cmd_clone(int argc, const char **argv, const char *prefix)
 	strbuf_release(&key);
 	strbuf_release(&value);
 	junk_mode = JUNK_LEAVE_ALL;
+
+	free(refspec);
 	return err;
 }