[thirdparty/git.git] / builtin-fetch.c

/*
 * "git fetch"
 */
#include "cache.h"
#include "refs.h"
#include "commit.h"
#include "builtin.h"
#include "path-list.h"
#include "remote.h"
#include "transport.h"

static const char fetch_usage[] = "git-fetch [-a | --append] [--upload-pack <upload-pack>] [-f | --force] [--no-tags] [-t | --tags] [-k | --keep] [-u | --update-head-ok] [--depth <depth>] [-v | --verbose] [<repository> <refspec>...]";

static int append, force, tags, no_tags, update_head_ok, verbose, quiet;
static char *default_rla = NULL;
static struct transport *transport;

static void unlock_pack(void)
{
	if (transport)
		transport_unlock_pack(transport);
}

static void unlock_pack_on_signal(int signo)
{
	unlock_pack();
	signal(SIGINT, SIG_DFL);
	raise(signo);
}

static void find_merge_config(struct ref *ref_map, struct remote *remote)
{
	struct ref *rm = ref_map;
	struct branch *branch = branch_get(NULL);

	for (rm = ref_map; rm; rm = rm->next) {
		if (!branch_has_merge_config(branch)) {
			if (remote && remote->fetch &&
			    !strcmp(remote->fetch[0].src, rm->name))
				rm->merge = 1;
		} else {
			if (branch_merges(branch, rm->name))
				rm->merge = 1;
		}
	}
}

static struct ref *get_ref_map(struct transport *transport,
			       struct refspec *refs, int ref_count, int tags,
			       int *autotags)
{
	int i;
	struct ref *rm;
	struct ref *ref_map = NULL;
	struct ref **tail = &ref_map;

	struct ref *remote_refs = transport_get_remote_refs(transport);

	if (ref_count || tags) {
		for (i = 0; i < ref_count; i++) {
			get_fetch_map(remote_refs, &refs[i], &tail);
			if (refs[i].dst && refs[i].dst[0])
				*autotags = 1;
		}
		/* Merge everything on the command line, but not --tags */
		for (rm = ref_map; rm; rm = rm->next)
			rm->merge = 1;
		if (tags) {
			struct refspec refspec;
			refspec.src = "refs/tags/";
			refspec.dst = "refs/tags/";
			refspec.pattern = 1;
			refspec.force = 0;
			get_fetch_map(remote_refs, &refspec, &tail);
		}
	} else {
		/* Use the defaults */
		struct remote *remote = transport->remote;
		if (remote->fetch_refspec_nr) {
			for (i = 0; i < remote->fetch_refspec_nr; i++) {
				get_fetch_map(remote_refs, &remote->fetch[i], &tail);
				if (remote->fetch[i].dst &&
				    remote->fetch[i].dst[0])
					*autotags = 1;
			}
			find_merge_config(ref_map, remote);
		} else {
			ref_map = get_remote_ref(remote_refs, "HEAD");

			ref_map->merge = 1;
		}
	}

	return ref_map;
}

static void show_new(enum object_type type, unsigned char *sha1_new)
{
	fprintf(stderr, "  %s: %s\n", typename(type),
		find_unique_abbrev(sha1_new, DEFAULT_ABBREV));
}

static int s_update_ref(const char *action,
			struct ref *ref,
			int check_old)
{
	char msg[1024];
	char *rla = getenv("GIT_REFLOG_ACTION");
	static struct ref_lock *lock;

	if (!rla)
		rla = default_rla;
	snprintf(msg, sizeof(msg), "%s: %s", rla, action);
	lock = lock_any_ref_for_update(ref->name,
				       check_old ? ref->old_sha1 : NULL, 0);
	if (!lock)
		return 1;
	if (write_ref_sha1(lock, ref->new_sha1, msg) < 0)
		return 1;
	return 0;
}

static int update_local_ref(struct ref *ref,
			    const char *note,
			    int verbose)
{
	char oldh[41], newh[41];
	struct commit *current = NULL, *updated;
	enum object_type type;
	struct branch *current_branch = branch_get(NULL);

	type = sha1_object_info(ref->new_sha1, NULL);
	if (type < 0)
		die("object %s not found", sha1_to_hex(ref->new_sha1));

	if (!*ref->name) {
		/* Not storing */
		if (verbose) {
			fprintf(stderr, "* fetched %s\n", note);
			show_new(type, ref->new_sha1);
		}
		return 0;
	}

	if (!hashcmp(ref->old_sha1, ref->new_sha1)) {
		if (verbose) {
			fprintf(stderr, "* %s: same as %s\n",
				ref->name, note);
			show_new(type, ref->new_sha1);
		}
		return 0;
	}

	if (!strcmp(ref->name, current_branch->name) &&
	    !(update_head_ok || is_bare_repository()) &&
	    !is_null_sha1(ref->old_sha1)) {
		/*
		 * If this is the head, and it's not okay to update
		 * the head, and the old value of the head isn't empty...
		 */
		fprintf(stderr,
			" * %s: Cannot fetch into the current branch.\n",
			ref->name);
		return 1;
	}

	if (!is_null_sha1(ref->old_sha1) &&
	    !prefixcmp(ref->name, "refs/tags/")) {
		fprintf(stderr, "* %s: updating with %s\n",
			ref->name, note);
		show_new(type, ref->new_sha1);
		return s_update_ref("updating tag", ref, 0);
	}

	current = lookup_commit_reference(ref->old_sha1);
	updated = lookup_commit_reference(ref->new_sha1);
	if (!current || !updated) {
		char *msg;
		if (!strncmp(ref->name, "refs/tags/", 10))
			msg = "storing tag";
		else
			msg = "storing head";
		fprintf(stderr, "* %s: storing %s\n",
			ref->name, note);
		show_new(type, ref->new_sha1);
		return s_update_ref(msg, ref, 0);
	}

	strcpy(oldh, find_unique_abbrev(current->object.sha1, DEFAULT_ABBREV));
	strcpy(newh, find_unique_abbrev(ref->new_sha1, DEFAULT_ABBREV));

	if (in_merge_bases(current, &updated, 1)) {
		fprintf(stderr, "* %s: fast forward to %s\n",
			ref->name, note);
		fprintf(stderr, "  old..new: %s..%s\n", oldh, newh);
		return s_update_ref("fast forward", ref, 1);
	}
	if (!force && !ref->force) {
		fprintf(stderr,
			"* %s: not updating to non-fast forward %s\n",
			ref->name, note);
		fprintf(stderr,
			"  old...new: %s...%s\n", oldh, newh);
		return 1;
	}
	fprintf(stderr,
		"* %s: forcing update to non-fast forward %s\n",
		ref->name, note);
	fprintf(stderr, "  old...new: %s...%s\n", oldh, newh);
	return s_update_ref("forced-update", ref, 1);
}

static void store_updated_refs(const char *url, struct ref *ref_map)
{
	FILE *fp;
	struct commit *commit;
	int url_len, i, note_len;
	char note[1024];
	const char *what, *kind;
	struct ref *rm;

	fp = fopen(git_path("FETCH_HEAD"), "a");
	for (rm = ref_map; rm; rm = rm->next) {
		struct ref *ref = NULL;

		if (rm->peer_ref) {
			ref = xcalloc(1, sizeof(*ref) + strlen(rm->peer_ref->name) + 1);
			strcpy(ref->name, rm->peer_ref->name);
			hashcpy(ref->old_sha1, rm->peer_ref->old_sha1);
			hashcpy(ref->new_sha1, rm->old_sha1);
			ref->force = rm->peer_ref->force;
		}

		commit = lookup_commit_reference(rm->old_sha1);
		if (!commit)
			rm->merge = 0;

		if (!strcmp(rm->name, "HEAD")) {
			kind = "";
			what = "";
		}
		else if (!prefixcmp(rm->name, "refs/heads/")) {
			kind = "branch";
			what = rm->name + 11;
		}
		else if (!prefixcmp(rm->name, "refs/tags/")) {
			kind = "tag";
			what = rm->name + 10;
		}
		else if (!prefixcmp(rm->name, "refs/remotes/")) {
			kind = "remote branch";
			what = rm->name + 13;
		}
		else {
			kind = "";
			what = rm->name;
		}

		url_len = strlen(url);
		for (i = url_len - 1; url[i] == '/' && 0 <= i; i--)
			;
		url_len = i + 1;
		if (4 < i && !strncmp(".git", url + i - 3, 4))
			url_len = i - 3;

		note_len = 0;
		if (*what) {
			if (*kind)
				note_len += sprintf(note + note_len, "%s ",
						    kind);
			note_len += sprintf(note + note_len, "'%s' of ", what);
		}
		note_len += sprintf(note + note_len, "%.*s", url_len, url);
		fprintf(fp, "%s\t%s\t%s\n",
			sha1_to_hex(commit ? commit->object.sha1 :
				    rm->old_sha1),
			rm->merge ? "" : "not-for-merge",
			note);

		if (ref)
			update_local_ref(ref, note, verbose);
	}
	fclose(fp);
}

static int fetch_refs(struct transport *transport, struct ref *ref_map)
{
	int ret = transport_fetch_refs(transport, ref_map);
	if (!ret)
		store_updated_refs(transport->url, ref_map);
	transport_unlock_pack(transport);
	return ret;
}

static int add_existing(const char *refname, const unsigned char *sha1,
			int flag, void *cbdata)
{
	struct path_list *list = (struct path_list *)cbdata;
	path_list_insert(refname, list);
	return 0;
}

static struct ref *find_non_local_tags(struct transport *transport,
				       struct ref *fetch_map)
{
	static struct path_list existing_refs = { NULL, 0, 0, 0 };
	struct path_list new_refs = { NULL, 0, 0, 1 };
	char *ref_name;
	int ref_name_len;
	unsigned char *ref_sha1;
	struct ref *tag_ref;
	struct ref *rm = NULL;
	struct ref *ref_map = NULL;
	struct ref **tail = &ref_map;
	struct ref *ref;

	for_each_ref(add_existing, &existing_refs);
	for (ref = transport_get_remote_refs(transport); ref; ref = ref->next) {
		if (prefixcmp(ref->name, "refs/tags"))
			continue;

		ref_name = xstrdup(ref->name);
		ref_name_len = strlen(ref_name);
		ref_sha1 = ref->old_sha1;

		if (!strcmp(ref_name + ref_name_len - 3, "^{}")) {
			ref_name[ref_name_len - 3] = 0;
			tag_ref = transport_get_remote_refs(transport);
			while (tag_ref) {
				if (!strcmp(tag_ref->name, ref_name)) {
					ref_sha1 = tag_ref->old_sha1;
					break;
				}
				tag_ref = tag_ref->next;
			}
		}

		if (!path_list_has_path(&existing_refs, ref_name) &&
		    !path_list_has_path(&new_refs, ref_name) &&
		    lookup_object(ref->old_sha1)) {
			fprintf(stderr, "Auto-following %s\n",
				ref_name);

			path_list_insert(ref_name, &new_refs);

			rm = alloc_ref(strlen(ref_name) + 1);
			strcpy(rm->name, ref_name);
			rm->peer_ref = alloc_ref(strlen(ref_name) + 1);
			strcpy(rm->peer_ref->name, ref_name);
			hashcpy(rm->old_sha1, ref_sha1);

			*tail = rm;
			tail = &rm->next;
		}
		free(ref_name);
	}

	return ref_map;
}

static int do_fetch(struct transport *transport,
		    struct refspec *refs, int ref_count)
{
	struct ref *ref_map, *fetch_map;
	struct ref *rm;
	int autotags = (transport->remote->fetch_tags == 1);
	if (transport->remote->fetch_tags == 2 && !no_tags)
		tags = 1;
	if (transport->remote->fetch_tags == -1)
		no_tags = 1;

	if (!transport->ops || !transport->ops->get_refs_list ||
	    !transport->ops->fetch)
		die("Don't know how to fetch from %s", transport->url);

	/* if not appending, truncate FETCH_HEAD */
	if (!append)
		fclose(fopen(git_path("FETCH_HEAD"), "w"));

	ref_map = get_ref_map(transport, refs, ref_count, tags, &autotags);

	for (rm = ref_map; rm; rm = rm->next) {
		if (rm->peer_ref)
			read_ref(rm->peer_ref->name, rm->peer_ref->old_sha1);
	}

	if (fetch_refs(transport, ref_map)) {
		free_refs(ref_map);
		return 1;
	}

	fetch_map = ref_map;

	/* if neither --no-tags nor --tags was specified, do automated tag
	 * following ... */
	if (!(tags || no_tags) && autotags) {
		ref_map = find_non_local_tags(transport, fetch_map);
		if (ref_map) {
			transport_set_option(transport, TRANS_OPT_DEPTH, "0");
			fetch_refs(transport, ref_map);
		}
		free_refs(ref_map);
	}

	free_refs(fetch_map);

	return 0;
}

int cmd_fetch(int argc, const char **argv, const char *prefix)
{
	struct remote *remote;
	int i, j, rla_offset;
	static const char **refs = NULL;
	int ref_nr = 0;
	int cmd_len = 0;
	const char *depth = NULL, *upload_pack = NULL;
	int keep = 0;

	for (i = 1; i < argc; i++) {
		const char *arg = argv[i];
		cmd_len += strlen(arg);

		if (arg[0] != '-')
			break;
		if (!strcmp(arg, "--append") || !strcmp(arg, "-a")) {
			append = 1;
			continue;
		}
		if (!prefixcmp(arg, "--upload-pack=")) {
			upload_pack = arg + 14;
			continue;
		}
		if (!strcmp(arg, "--upload-pack")) {
			i++;
			if (i == argc)
				usage(fetch_usage);
			upload_pack = argv[i];
			continue;
		}
		if (!strcmp(arg, "--force") || !strcmp(arg, "-f")) {
			force = 1;
			continue;
		}
		if (!strcmp(arg, "--no-tags")) {
			no_tags = 1;
			continue;
		}
		if (!strcmp(arg, "--tags") || !strcmp(arg, "-t")) {
			tags = 1;
			continue;
		}
		if (!strcmp(arg, "--keep") || !strcmp(arg, "-k")) {
			keep = 1;
			continue;
		}
		if (!strcmp(arg, "--update-head-ok") || !strcmp(arg, "-u")) {
			update_head_ok = 1;
			continue;
		}
		if (!prefixcmp(arg, "--depth=")) {
			depth = arg + 8;
			continue;
		}
		if (!strcmp(arg, "--depth")) {
			i++;
			if (i == argc)
				usage(fetch_usage);
			depth = argv[i];
			continue;
		}
		if (!strcmp(arg, "--quiet")) {
			quiet = 1;
			continue;
		}
		if (!strcmp(arg, "--verbose") || !strcmp(arg, "-v")) {
			verbose++;
			continue;
		}
		usage(fetch_usage);
	}

	for (j = i; j < argc; j++)
		cmd_len += strlen(argv[j]);

	default_rla = xmalloc(cmd_len + 5 + argc + 1);
	sprintf(default_rla, "fetch");
	rla_offset = strlen(default_rla);
	for (j = 1; j < argc; j++) {
		sprintf(default_rla + rla_offset, " %s", argv[j]);
		rla_offset += strlen(argv[j]) + 1;
	}

	if (i == argc)
		remote = remote_get(NULL);
	else
		remote = remote_get(argv[i++]);

	transport = transport_get(remote, remote->uri[0]);
	if (verbose >= 2)
		transport->verbose = 1;
	if (quiet)
		transport->verbose = 0;
	if (upload_pack)
		transport_set_option(transport, TRANS_OPT_UPLOADPACK, upload_pack);
	if (keep)
		transport_set_option(transport, TRANS_OPT_KEEP, "yes");
	transport_set_option(transport, TRANS_OPT_DEPTH, depth);

	if (!transport->url)
		die("Where do you want to fetch from today?");

	if (i < argc) {
		int j = 0;
		refs = xcalloc(argc - i + 1, sizeof(const char *));
		while (i < argc) {
			if (!strcmp(argv[i], "tag")) {
				char *ref;
				i++;
				ref = xmalloc(strlen(argv[i]) * 2 + 22);
				strcpy(ref, "refs/tags/");
				strcat(ref, argv[i]);
				strcat(ref, ":refs/tags/");
				strcat(ref, argv[i]);
				refs[j++] = ref;
			} else
				refs[j++] = argv[i];
			i++;
		}
		refs[j] = NULL;
		ref_nr = j;
		for (j = 0; refs[j]; j++)
			printf("ref: %s\n", refs[j]);
	}

	signal(SIGINT, unlock_pack_on_signal);
	atexit(unlock_pack);
	return do_fetch(transport, parse_ref_spec(ref_nr, refs), ref_nr);
}
Commit	Line	Data
b888d61c DB	1	/*
	2	* "git fetch"
	3	*/
	4	#include "cache.h"
	5	#include "refs.h"
	6	#include "commit.h"
	7	#include "builtin.h"
	8	#include "path-list.h"
	9	#include "remote.h"
	10	#include "transport.h"
	11
	12	static const char fetch_usage[] = "git-fetch [-a \| --append] [--upload-pack <upload-pack>] [-f \| --force] [--no-tags] [-t \| --tags] [-k \| --keep] [-u \| --update-head-ok] [--depth <depth>] [-v \| --verbose] [<repository> <refspec>...]";
	13
	14	static int append, force, tags, no_tags, update_head_ok, verbose, quiet;
b888d61c	15	static char *default_rla = NULL;
e4022ed2 SP	16	static struct transport *transport;
	17
	18	static void unlock_pack(void)
	19	{
	20	if (transport)
	21	transport_unlock_pack(transport);
	22	}
	23
	24	static void unlock_pack_on_signal(int signo)
	25	{
	26	unlock_pack();
	27	signal(SIGINT, SIG_DFL);
	28	raise(signo);
	29	}
b888d61c DB	30
	31	static void find_merge_config(struct ref ref_map, struct remote remote)
	32	{
	33	struct ref *rm = ref_map;
	34	struct branch *branch = branch_get(NULL);
	35
	36	for (rm = ref_map; rm; rm = rm->next) {
	37	if (!branch_has_merge_config(branch)) {
	38	if (remote && remote->fetch &&
	39	!strcmp(remote->fetch[0].src, rm->name))
	40	rm->merge = 1;
	41	} else {
	42	if (branch_merges(branch, rm->name))
	43	rm->merge = 1;
	44	}
	45	}
	46	}
	47
	48	static struct ref get_ref_map(struct transport transport,
	49	struct refspec *refs, int ref_count, int tags,
	50	int *autotags)
	51	{
	52	int i;
	53	struct ref *rm;
	54	struct ref *ref_map = NULL;
	55	struct ref **tail = &ref_map;
	56
	57	struct ref *remote_refs = transport_get_remote_refs(transport);
	58
	59	if (ref_count \|\| tags) {
	60	for (i = 0; i < ref_count; i++) {
	61	get_fetch_map(remote_refs, &refs[i], &tail);
	62	if (refs[i].dst && refs[i].dst[0])
	63	*autotags = 1;
	64	}
	65	/* Merge everything on the command line, but not --tags */
	66	for (rm = ref_map; rm; rm = rm->next)
	67	rm->merge = 1;
	68	if (tags) {
	69	struct refspec refspec;
	70	refspec.src = "refs/tags/";
	71	refspec.dst = "refs/tags/";
	72	refspec.pattern = 1;
	73	refspec.force = 0;
	74	get_fetch_map(remote_refs, &refspec, &tail);
	75	}
	76	} else {
	77	/* Use the defaults */
	78	struct remote *remote = transport->remote;
	79	if (remote->fetch_refspec_nr) {
	80	for (i = 0; i < remote->fetch_refspec_nr; i++) {
	81	get_fetch_map(remote_refs, &remote->fetch[i], &tail);
	82	if (remote->fetch[i].dst &&
	83	remote->fetch[i].dst[0])
	84	*autotags = 1;
	85	}
	86	find_merge_config(ref_map, remote);
	87	} else {
	88	ref_map = get_remote_ref(remote_refs, "HEAD");
	89
	90	ref_map->merge = 1;
	91	}
	92	}
	93
94	return ref_map;
95	}
96
97	static void show_new(enum object_type type, unsigned char *sha1_new)
98	{
99	fprintf(stderr, " %s: %s\n", typename(type),
100	find_unique_abbrev(sha1_new, DEFAULT_ABBREV));
101	}
102
103	static int s_update_ref(const char *action,
104	struct ref *ref,
105	int check_old)
106	{
107	char msg[1024];
108	char *rla = getenv("GIT_REFLOG_ACTION");
109	static struct ref_lock *lock;
110
111	if (!rla)
112	rla = default_rla;
113	snprintf(msg, sizeof(msg), "%s: %s", rla, action);
114	lock = lock_any_ref_for_update(ref->name,
115	check_old ? ref->old_sha1 : NULL, 0);
116	if (!lock)
117	return 1;
118	if (write_ref_sha1(lock, ref->new_sha1, msg) < 0)
119	return 1;
120	return 0;
121	}
122
123	static int update_local_ref(struct ref *ref,
124	const char *note,
125	int verbose)
126	{
127	char oldh[41], newh[41];
128	struct commit current = NULL, updated;
129	enum object_type type;
130	struct branch *current_branch = branch_get(NULL);
131
132	type = sha1_object_info(ref->new_sha1, NULL);
133	if (type < 0)
134	die("object %s not found", sha1_to_hex(ref->new_sha1));
135
136	if (!*ref->name) {
137	/* Not storing */
138	if (verbose) {
139	fprintf(stderr, "* fetched %s\n", note);
140	show_new(type, ref->new_sha1);
141	}
142	return 0;
143	}
144
145	if (!hashcmp(ref->old_sha1, ref->new_sha1)) {
146	if (verbose) {
147	fprintf(stderr, "* %s: same as %s\n",
148	ref->name, note);
149	show_new(type, ref->new_sha1);
150	}
151	return 0;
152	}
153
154	if (!strcmp(ref->name, current_branch->name) &&
155	!(update_head_ok \|\| is_bare_repository()) &&
156	!is_null_sha1(ref->old_sha1)) {
157	/*
158	* If this is the head, and it's not okay to update
159	* the head, and the old value of the head isn't empty...
160	*/
161	fprintf(stderr,
162	" * %s: Cannot fetch into the current branch.\n",
163	ref->name);
164	return 1;
165	}
166
167	if (!is_null_sha1(ref->old_sha1) &&
168	!prefixcmp(ref->name, "refs/tags/")) {
169	fprintf(stderr, "* %s: updating with %s\n",
170	ref->name, note);
171	show_new(type, ref->new_sha1);
172	return s_update_ref("updating tag", ref, 0);
173	}
174
175	current = lookup_commit_reference(ref->old_sha1);
176	updated = lookup_commit_reference(ref->new_sha1);
177	if (!current \|\| !updated) {
178	char *msg;
179	if (!strncmp(ref->name, "refs/tags/", 10))
180	msg = "storing tag";
181	else
182	msg = "storing head";
183	fprintf(stderr, "* %s: storing %s\n",
184	ref->name, note);
185	show_new(type, ref->new_sha1);
186	return s_update_ref(msg, ref, 0);
187	}
188
189	strcpy(oldh, find_unique_abbrev(current->object.sha1, DEFAULT_ABBREV));
190	strcpy(newh, find_unique_abbrev(ref->new_sha1, DEFAULT_ABBREV));
191
192	if (in_merge_bases(current, &updated, 1)) {
193	fprintf(stderr, "* %s: fast forward to %s\n",
194	ref->name, note);
195	fprintf(stderr, " old..new: %s..%s\n", oldh, newh);
196	return s_update_ref("fast forward", ref, 1);
197	}
198	if (!force && !ref->force) {
199	fprintf(stderr,
200	"* %s: not updating to non-fast forward %s\n",
201	ref->name, note);
202	fprintf(stderr,
203	" old...new: %s...%s\n", oldh, newh);
204	return 1;
205	}
206	fprintf(stderr,
207	"* %s: forcing update to non-fast forward %s\n",
208	ref->name, note);
209	fprintf(stderr, " old...new: %s...%s\n", oldh, newh);
210	return s_update_ref("forced-update", ref, 1);
211	}
212
213	static void store_updated_refs(const char url, struct ref ref_map)
214	{
215	FILE *fp;
216	struct commit *commit;
217	int url_len, i, note_len;
218	char note[1024];
219	const char what, kind;
220	struct ref *rm;
221
222	fp = fopen(git_path("FETCH_HEAD"), "a");
223	for (rm = ref_map; rm; rm = rm->next) {
224	struct ref *ref = NULL;
225
226	if (rm->peer_ref) {
227	ref = xcalloc(1, sizeof(*ref) + strlen(rm->peer_ref->name) + 1);
228	strcpy(ref->name, rm->peer_ref->name);
229	hashcpy(ref->old_sha1, rm->peer_ref->old_sha1);
230	hashcpy(ref->new_sha1, rm->old_sha1);
1aad91f5	231	ref->force = rm->peer_ref->force;
b888d61c DB	232	}
	233
	234	commit = lookup_commit_reference(rm->old_sha1);
	235	if (!commit)
	236	rm->merge = 0;
	237
	238	if (!strcmp(rm->name, "HEAD")) {
	239	kind = "";
	240	what = "";
	241	}
	242	else if (!prefixcmp(rm->name, "refs/heads/")) {
	243	kind = "branch";
	244	what = rm->name + 11;
	245	}
	246	else if (!prefixcmp(rm->name, "refs/tags/")) {
	247	kind = "tag";
	248	what = rm->name + 10;
	249	}
	250	else if (!prefixcmp(rm->name, "refs/remotes/")) {
	251	kind = "remote branch";
	252	what = rm->name + 13;
	253	}
	254	else {
	255	kind = "";
	256	what = rm->name;
	257	}
	258
	259	url_len = strlen(url);
	260	for (i = url_len - 1; url[i] == '/' && 0 <= i; i--)
	261	;
	262	url_len = i + 1;
	263	if (4 < i && !strncmp(".git", url + i - 3, 4))
	264	url_len = i - 3;
	265
	266	note_len = 0;
	267	if (*what) {
	268	if (*kind)
	269	note_len += sprintf(note + note_len, "%s ",
	270	kind);
	271	note_len += sprintf(note + note_len, "'%s' of ", what);
	272	}
	273	note_len += sprintf(note + note_len, "%.*s", url_len, url);
	274	fprintf(fp, "%s\t%s\t%s\n",
	275	sha1_to_hex(commit ? commit->object.sha1 :
	276	rm->old_sha1),
	277	rm->merge ? "" : "not-for-merge",
	278	note);
	279
	280	if (ref)
	281	update_local_ref(ref, note, verbose);
	282	}
	283	fclose(fp);
	284	}
	285
	286	static int fetch_refs(struct transport transport, struct ref ref_map)
	287	{
	288	int ret = transport_fetch_refs(transport, ref_map);
	289	if (!ret)
	290	store_updated_refs(transport->url, ref_map);
1788c39c	291	transport_unlock_pack(transport);
b888d61c DB	292	return ret;
	293	}
	294
	295	static int add_existing(const char refname, const unsigned char sha1,
	296	int flag, void *cbdata)
	297	{
	298	struct path_list list = (struct path_list )cbdata;
	299	path_list_insert(refname, list);
	300	return 0;
	301	}
	302
	303	static struct ref find_non_local_tags(struct transport transport,
	304	struct ref *fetch_map)
	305	{
	306	static struct path_list existing_refs = { NULL, 0, 0, 0 };
	307	struct path_list new_refs = { NULL, 0, 0, 1 };
	308	char *ref_name;
	309	int ref_name_len;
	310	unsigned char *ref_sha1;
	311	struct ref *tag_ref;
	312	struct ref *rm = NULL;
	313	struct ref *ref_map = NULL;
	314	struct ref **tail = &ref_map;
	315	struct ref *ref;
	316
	317	for_each_ref(add_existing, &existing_refs);
	318	for (ref = transport_get_remote_refs(transport); ref; ref = ref->next) {
	319	if (prefixcmp(ref->name, "refs/tags"))
	320	continue;
	321
	322	ref_name = xstrdup(ref->name);
	323	ref_name_len = strlen(ref_name);
	324	ref_sha1 = ref->old_sha1;
	325
	326	if (!strcmp(ref_name + ref_name_len - 3, "^{}")) {
	327	ref_name[ref_name_len - 3] = 0;
	328	tag_ref = transport_get_remote_refs(transport);
	329	while (tag_ref) {
	330	if (!strcmp(tag_ref->name, ref_name)) {
	331	ref_sha1 = tag_ref->old_sha1;
	332	break;
	333	}
	334	tag_ref = tag_ref->next;
	335	}
	336	}
	337
	338	if (!path_list_has_path(&existing_refs, ref_name) &&
	339	!path_list_has_path(&new_refs, ref_name) &&
	340	lookup_object(ref->old_sha1)) {
	341	fprintf(stderr, "Auto-following %s\n",
	342	ref_name);
	343
	344	path_list_insert(ref_name, &new_refs);
	345
	346	rm = alloc_ref(strlen(ref_name) + 1);
	347	strcpy(rm->name, ref_name);
	348	rm->peer_ref = alloc_ref(strlen(ref_name) + 1);
	349	strcpy(rm->peer_ref->name, ref_name);
	350	hashcpy(rm->old_sha1, ref_sha1);
	351
	352	*tail = rm;
	353	tail = &rm->next;
	354	}
	355	free(ref_name);
356	}
357
358	return ref_map;
359	}
360
361	static int do_fetch(struct transport *transport,
362	struct refspec *refs, int ref_count)
363	{
364	struct ref ref_map, fetch_map;
365	struct ref *rm;
366	int autotags = (transport->remote->fetch_tags == 1);
367	if (transport->remote->fetch_tags == 2 && !no_tags)
368	tags = 1;
369	if (transport->remote->fetch_tags == -1)
370	no_tags = 1;
371
372	if (!transport->ops \|\| !transport->ops->get_refs_list \|\|
425b1393	373	!transport->ops->fetch)
b888d61c DB	374	die("Don't know how to fetch from %s", transport->url);
	375
	376	/* if not appending, truncate FETCH_HEAD */
	377	if (!append)
	378	fclose(fopen(git_path("FETCH_HEAD"), "w"));
	379
	380	ref_map = get_ref_map(transport, refs, ref_count, tags, &autotags);
	381
	382	for (rm = ref_map; rm; rm = rm->next) {
	383	if (rm->peer_ref)
	384	read_ref(rm->peer_ref->name, rm->peer_ref->old_sha1);
b888d61c DB	385	}
	386
	387	if (fetch_refs(transport, ref_map)) {
	388	free_refs(ref_map);
	389	return 1;
	390	}
	391
	392	fetch_map = ref_map;
	393
	394	/* if neither --no-tags nor --tags was specified, do automated tag
	395	* following ... */
	396	if (!(tags \|\| no_tags) && autotags) {
	397	ref_map = find_non_local_tags(transport, fetch_map);
	398	if (ref_map) {
	399	transport_set_option(transport, TRANS_OPT_DEPTH, "0");
	400	fetch_refs(transport, ref_map);
	401	}
	402	free_refs(ref_map);
	403	}
	404
	405	free_refs(fetch_map);
	406
	407	return 0;
	408	}
	409
b888d61c DB	410	int cmd_fetch(int argc, const char *argv, const char prefix)
	411	{
	412	struct remote *remote;
b888d61c DB	413	int i, j, rla_offset;
	414	static const char **refs = NULL;
	415	int ref_nr = 0;
	416	int cmd_len = 0;
	417	const char depth = NULL, upload_pack = NULL;
	418	int keep = 0;
	419
b888d61c DB	420	for (i = 1; i < argc; i++) {
	421	const char *arg = argv[i];
	422	cmd_len += strlen(arg);
	423
	424	if (arg[0] != '-')
	425	break;
	426	if (!strcmp(arg, "--append") \|\| !strcmp(arg, "-a")) {
	427	append = 1;
	428	continue;
	429	}
	430	if (!prefixcmp(arg, "--upload-pack=")) {
	431	upload_pack = arg + 14;
	432	continue;
	433	}
	434	if (!strcmp(arg, "--upload-pack")) {
	435	i++;
	436	if (i == argc)
	437	usage(fetch_usage);
	438	upload_pack = argv[i];
	439	continue;
	440	}
	441	if (!strcmp(arg, "--force") \|\| !strcmp(arg, "-f")) {
	442	force = 1;
	443	continue;
	444	}
	445	if (!strcmp(arg, "--no-tags")) {
	446	no_tags = 1;
	447	continue;
	448	}
	449	if (!strcmp(arg, "--tags") \|\| !strcmp(arg, "-t")) {
	450	tags = 1;
	451	continue;
	452	}
	453	if (!strcmp(arg, "--keep") \|\| !strcmp(arg, "-k")) {
	454	keep = 1;
	455	continue;
	456	}
	457	if (!strcmp(arg, "--update-head-ok") \|\| !strcmp(arg, "-u")) {
	458	update_head_ok = 1;
	459	continue;
	460	}
	461	if (!prefixcmp(arg, "--depth=")) {
	462	depth = arg + 8;
	463	continue;
	464	}
	465	if (!strcmp(arg, "--depth")) {
	466	i++;
	467	if (i == argc)
	468	usage(fetch_usage);
	469	depth = argv[i];
	470	continue;
	471	}
	472	if (!strcmp(arg, "--quiet")) {
	473	quiet = 1;
	474	continue;
	475	}
	476	if (!strcmp(arg, "--verbose") \|\| !strcmp(arg, "-v")) {
	477	verbose++;
	478	continue;
	479	}
	480	usage(fetch_usage);
	481	}
	482
	483	for (j = i; j < argc; j++)
484	cmd_len += strlen(argv[j]);
485
486	default_rla = xmalloc(cmd_len + 5 + argc + 1);
487	sprintf(default_rla, "fetch");
488	rla_offset = strlen(default_rla);
489	for (j = 1; j < argc; j++) {
490	sprintf(default_rla + rla_offset, " %s", argv[j]);
4ad1eada	491	rla_offset += strlen(argv[j]) + 1;
b888d61c DB	492	}
	493
	494	if (i == argc)
	495	remote = remote_get(NULL);
	496	else
	497	remote = remote_get(argv[i++]);
	498
e5f4e214	499	transport = transport_get(remote, remote->uri[0]);
b888d61c DB	500	if (verbose >= 2)
	501	transport->verbose = 1;
	502	if (quiet)
	503	transport->verbose = 0;
	504	if (upload_pack)
	505	transport_set_option(transport, TRANS_OPT_UPLOADPACK, upload_pack);
	506	if (keep)
	507	transport_set_option(transport, TRANS_OPT_KEEP, "yes");
	508	transport_set_option(transport, TRANS_OPT_DEPTH, depth);
	509
	510	if (!transport->url)
	511	die("Where do you want to fetch from today?");
	512
	513	if (i < argc) {
	514	int j = 0;
	515	refs = xcalloc(argc - i + 1, sizeof(const char *));
	516	while (i < argc) {
	517	if (!strcmp(argv[i], "tag")) {
	518	char *ref;
	519	i++;
	520	ref = xmalloc(strlen(argv[i]) * 2 + 22);
	521	strcpy(ref, "refs/tags/");
	522	strcat(ref, argv[i]);
	523	strcat(ref, ":refs/tags/");
	524	strcat(ref, argv[i]);
	525	refs[j++] = ref;
	526	} else
	527	refs[j++] = argv[i];
	528	i++;
	529	}
	530	refs[j] = NULL;
	531	ref_nr = j;
	532	for (j = 0; refs[j]; j++)
	533	printf("ref: %s\n", refs[j]);
	534	}
	535
e4022ed2 SP	536	signal(SIGINT, unlock_pack_on_signal);
e4022ed2 SP	537	atexit(unlock_pack);
b888d61c DB	538	return do_fetch(transport, parse_ref_spec(ref_nr, refs), ref_nr);
b888d61c DB	539	}