merge(third_party/git): Merge squashed git subtree at v2.23.0

Merge commit '1b593e1ea4' as 'third_party/git'

third_party/git/builtin/ls-remote.c

@@ -0,0 +1,152 @@
+#include "builtin.h"
+#include "cache.h"
+#include "transport.h"
+#include "ref-filter.h"
+#include "remote.h"
+#include "refs.h"
+
+static const char * const ls_remote_usage[] = {
+	N_("git ls-remote [--heads] [--tags] [--refs] [--upload-pack=<exec>]\n"
+	   "                     [-q | --quiet] [--exit-code] [--get-url]\n"
+	   "                     [--symref] [<repository> [<refs>...]]"),
+	NULL
+};
+
+/*
+ * Is there one among the list of patterns that match the tail part
+ * of the path?
+ */
+static int tail_match(const char **pattern, const char *path)
+{
+	const char *p;
+	char *pathbuf;
+
+	if (!pattern)
+		return 1; /* no restriction */
+
+	pathbuf = xstrfmt("/%s", path);
+	while ((p = *(pattern++)) != NULL) {
+		if (!wildmatch(p, pathbuf, 0)) {
+			free(pathbuf);
+			return 1;
+		}
+	}
+	free(pathbuf);
+	return 0;
+}
+
+int cmd_ls_remote(int argc, const char **argv, const char *prefix)
+{
+	const char *dest = NULL;
+	unsigned flags = 0;
+	int get_url = 0;
+	int quiet = 0;
+	int status = 0;
+	int show_symref_target = 0;
+	const char *uploadpack = NULL;
+	const char **pattern = NULL;
+	struct argv_array ref_prefixes = ARGV_ARRAY_INIT;
+	int i;
+	struct string_list server_options = STRING_LIST_INIT_DUP;
+
+	struct remote *remote;
+	struct transport *transport;
+	const struct ref *ref;
+	struct ref_array ref_array;
+	static struct ref_sorting *sorting = NULL, **sorting_tail = &sorting;
+
+	struct option options[] = {
+		OPT__QUIET(&quiet, N_("do not print remote URL")),
+		OPT_STRING(0, "upload-pack", &uploadpack, N_("exec"),
+			   N_("path of git-upload-pack on the remote host")),
+		{ OPTION_STRING, 0, "exec", &uploadpack, N_("exec"),
+			   N_("path of git-upload-pack on the remote host"),
+			   PARSE_OPT_HIDDEN },
+		OPT_BIT('t', "tags", &flags, N_("limit to tags"), REF_TAGS),
+		OPT_BIT('h', "heads", &flags, N_("limit to heads"), REF_HEADS),
+		OPT_BIT(0, "refs", &flags, N_("do not show peeled tags"), REF_NORMAL),
+		OPT_BOOL(0, "get-url", &get_url,
+			 N_("take url.<base>.insteadOf into account")),
+		OPT_REF_SORT(sorting_tail),
+		OPT_SET_INT_F(0, "exit-code", &status,
+			      N_("exit with exit code 2 if no matching refs are found"),
+			      2, PARSE_OPT_NOCOMPLETE),
+		OPT_BOOL(0, "symref", &show_symref_target,
+			 N_("show underlying ref in addition to the object pointed by it")),
+		OPT_STRING_LIST('o', "server-option", &server_options, N_("server-specific"), N_("option to transmit")),
+		OPT_END()
+	};
+
+	memset(&ref_array, 0, sizeof(ref_array));
+
+	argc = parse_options(argc, argv, prefix, options, ls_remote_usage,
+			     PARSE_OPT_STOP_AT_NON_OPTION);
+	dest = argv[0];
+
+	if (argc > 1) {
+		int i;
+		pattern = xcalloc(argc, sizeof(const char *));
+		for (i = 1; i < argc; i++) {
+			pattern[i - 1] = xstrfmt("*/%s", argv[i]);
+		}
+	}
+
+	if (flags & REF_TAGS)
+		argv_array_push(&ref_prefixes, "refs/tags/");
+	if (flags & REF_HEADS)
+		argv_array_push(&ref_prefixes, "refs/heads/");
+
+	remote = remote_get(dest);
+	if (!remote) {
+		if (dest)
+			die("bad repository '%s'", dest);
+		die("No remote configured to list refs from.");
+	}
+	if (!remote->url_nr)
+		die("remote %s has no configured URL", dest);
+
+	if (get_url) {
+		printf("%s\n", *remote->url);
+		UNLEAK(sorting);
+		return 0;
+	}
+
+	transport = transport_get(remote, NULL);
+	if (uploadpack != NULL)
+		transport_set_option(transport, TRANS_OPT_UPLOADPACK, uploadpack);
+	if (server_options.nr)
+		transport->server_options = &server_options;
+
+	ref = transport_get_remote_refs(transport, &ref_prefixes);
+	if (transport_disconnect(transport)) {
+		UNLEAK(sorting);
+		return 1;
+	}
+
+	if (!dest && !quiet)
+		fprintf(stderr, "From %s\n", *remote->url);
+	for ( ; ref; ref = ref->next) {
+		struct ref_array_item *item;
+		if (!check_ref_type(ref, flags))
+			continue;
+		if (!tail_match(pattern, ref->name))
+			continue;
+		item = ref_array_push(&ref_array, ref->name, &ref->old_oid);
+		item->symref = xstrdup_or_null(ref->symref);
+	}
+
+	if (sorting)
+		ref_array_sort(sorting, &ref_array);
+
+	for (i = 0; i < ref_array.nr; i++) {
+		const struct ref_array_item *ref = ref_array.items[i];
+		if (show_symref_target && ref->symref)
+			printf("ref: %s\t%s\n", ref->symref, ref->refname);
+		printf("%s\t%s\n", oid_to_hex(&ref->objectname), ref->refname);
+		status = 0; /* we found something */
+	}
+
+	UNLEAK(sorting);
+	ref_array_clear(&ref_array);
+	return status;
+}