[thirdparty/git.git] / remote-testsvn.c

#include "cache.h"
#include "refs.h"
#include "remote.h"
#include "object-store.h"
#include "strbuf.h"
#include "url.h"
#include "exec-cmd.h"
#include "run-command.h"
#include "vcs-svn/svndump.h"
#include "notes.h"
#include "argv-array.h"

static const char *url;
static int dump_from_file;
static const char *private_ref;
static const char *remote_ref = "refs/heads/master";
static const char *marksfilename, *notes_ref;
struct rev_note { unsigned int rev_nr; };

static int cmd_capabilities(const char *line);
static int cmd_import(const char *line);
static int cmd_list(const char *line);

typedef int (*input_command_handler)(const char *);
struct input_command_entry {
	const char *name;
	input_command_handler fn;
	unsigned char batchable;	/* whether the command starts or is part of a batch */
};

static const struct input_command_entry input_command_list[] = {
	{ "capabilities", cmd_capabilities, 0 },
	{ "import", cmd_import, 1 },
	{ "list", cmd_list, 0 },
	{ NULL, NULL }
};

static int cmd_capabilities(const char *line)
{
	printf("import\n");
	printf("bidi-import\n");
	printf("refspec %s:%s\n\n", remote_ref, private_ref);
	fflush(stdout);
	return 0;
}

static void terminate_batch(void)
{
	/* terminate a current batch's fast-import stream */
	printf("done\n");
	fflush(stdout);
}

/* NOTE: 'ref' refers to a git reference, while 'rev' refers to a svn revision. */
static char *read_ref_note(const struct object_id *oid)
{
	const struct object_id *note_oid;
	char *msg = NULL;
	unsigned long msglen;
	enum object_type type;

	init_notes(NULL, notes_ref, NULL, 0);
	if (!(note_oid = get_note(NULL, oid)))
		return NULL;	/* note tree not found */
	if (!(msg = read_object_file(note_oid, &type, &msglen)))
		error("Empty notes tree. %s", notes_ref);
	else if (!msglen || type != OBJ_BLOB) {
		error("Note contains unusable content. "
			"Is something else using this notes tree? %s", notes_ref);
		FREE_AND_NULL(msg);
	}
	free_notes(NULL);
	return msg;
}

static int parse_rev_note(const char *msg, struct rev_note *res)
{
	const char *key, *value, *end;
	size_t len;

	while (*msg) {
		end = strchrnul(msg, '\n');
		len = end - msg;

		key = "Revision-number: ";
		if (starts_with(msg, key)) {
			long i;
			char *end;
			value = msg + strlen(key);
			i = strtol(value, &end, 0);
			if (end == value || i < 0 || i > UINT32_MAX)
				return -1;
			res->rev_nr = i;
			return 0;
		}
		msg += len + 1;
	}
	/* didn't find it */
	return -1;
}

static int note2mark_cb(const struct object_id *object_oid,
		const struct object_id *note_oid, char *note_path,
		void *cb_data)
{
	FILE *file = (FILE *)cb_data;
	char *msg;
	unsigned long msglen;
	enum object_type type;
	struct rev_note note;

	if (!(msg = read_object_file(note_oid, &type, &msglen)) ||
			!msglen || type != OBJ_BLOB) {
		free(msg);
		return 1;
	}
	if (parse_rev_note(msg, &note))
		return 2;
	if (fprintf(file, ":%d %s\n", note.rev_nr, oid_to_hex(object_oid)) < 1)
		return 3;
	return 0;
}

static void regenerate_marks(void)
{
	int ret;
	FILE *marksfile = xfopen(marksfilename, "w+");

	ret = for_each_note(NULL, 0, note2mark_cb, marksfile);
	if (ret)
		die("Regeneration of marks failed, returned %d.", ret);
	fclose(marksfile);
}

static void check_or_regenerate_marks(int latestrev)
{
	FILE *marksfile;
	struct strbuf sb = STRBUF_INIT;
	struct strbuf line = STRBUF_INIT;
	int found = 0;

	if (latestrev < 1)
		return;

	init_notes(NULL, notes_ref, NULL, 0);
	marksfile = fopen(marksfilename, "r");
	if (!marksfile) {
		regenerate_marks();
		marksfile = xfopen(marksfilename, "r");
		fclose(marksfile);
	} else {
		strbuf_addf(&sb, ":%d ", latestrev);
		while (strbuf_getline_lf(&line, marksfile) != EOF) {
			if (starts_with(line.buf, sb.buf)) {
				found++;
				break;
			}
		}
		fclose(marksfile);
		if (!found)
			regenerate_marks();
	}
	free_notes(NULL);
	strbuf_release(&sb);
	strbuf_release(&line);
}

static int cmd_import(const char *line)
{
	int code;
	int dumpin_fd;
	char *note_msg;
	struct object_id head_oid;
	unsigned int startrev;
	struct child_process svndump_proc = CHILD_PROCESS_INIT;
	const char *command = "svnrdump";

	if (read_ref(private_ref, &head_oid))
		startrev = 0;
	else {
		note_msg = read_ref_note(&head_oid);
		if(note_msg == NULL) {
			warning("No note found for %s.", private_ref);
			startrev = 0;
		} else {
			struct rev_note note = { 0 };
			if (parse_rev_note(note_msg, &note))
				die("Revision number couldn't be parsed from note.");
			startrev = note.rev_nr + 1;
			free(note_msg);
		}
	}
	check_or_regenerate_marks(startrev - 1);

	if (dump_from_file) {
		dumpin_fd = open(url, O_RDONLY);
		if(dumpin_fd < 0)
			die_errno("Couldn't open svn dump file %s.", url);
	} else {
		svndump_proc.out = -1;
		argv_array_push(&svndump_proc.args, command);
		argv_array_push(&svndump_proc.args, "dump");
		argv_array_push(&svndump_proc.args, url);
		argv_array_pushf(&svndump_proc.args, "-r%u:HEAD", startrev);

		code = start_command(&svndump_proc);
		if (code)
			die("Unable to start %s, code %d", command, code);
		dumpin_fd = svndump_proc.out;
	}
	/* setup marks file import/export */
	printf("feature import-marks-if-exists=%s\n"
			"feature export-marks=%s\n", marksfilename, marksfilename);

	svndump_init_fd(dumpin_fd, STDIN_FILENO);
	svndump_read(url, private_ref, notes_ref);
	svndump_deinit();
	svndump_reset();

	close(dumpin_fd);
	if (!dump_from_file) {
		code = finish_command(&svndump_proc);
		if (code)
			warning("%s, returned %d", command, code);
	}

	return 0;
}

static int cmd_list(const char *line)
{
	printf("? %s\n\n", remote_ref);
	fflush(stdout);
	return 0;
}

static int do_command(struct strbuf *line)
{
	const struct input_command_entry *p = input_command_list;
	static struct string_list batchlines = STRING_LIST_INIT_DUP;
	static const struct input_command_entry *batch_cmd;
	/*
	 * commands can be grouped together in a batch.
	 * Batches are ended by \n. If no batch is active the program ends.
	 * During a batch all lines are buffered and passed to the handler function
	 * when the batch is terminated.
	 */
	if (line->len == 0) {
		if (batch_cmd) {
			struct string_list_item *item;
			for_each_string_list_item(item, &batchlines)
				batch_cmd->fn(item->string);
			terminate_batch();
			batch_cmd = NULL;
			string_list_clear(&batchlines, 0);
			return 0;	/* end of the batch, continue reading other commands. */
		}
		return 1;	/* end of command stream, quit */
	}
	if (batch_cmd) {
		if (!starts_with(batch_cmd->name, line->buf))
			die("Active %s batch interrupted by %s", batch_cmd->name, line->buf);
		/* buffer batch lines */
		string_list_append(&batchlines, line->buf);
		return 0;
	}

	for (p = input_command_list; p->name; p++) {
		if (starts_with(line->buf, p->name) && (strlen(p->name) == line->len ||
				line->buf[strlen(p->name)] == ' ')) {
			if (p->batchable) {
				batch_cmd = p;
				string_list_append(&batchlines, line->buf);
				return 0;
			}
			return p->fn(line->buf);
		}
	}
	die("Unknown command '%s'\n", line->buf);
	return 0;
}

int cmd_main(int argc, const char **argv)
{
	struct strbuf buf = STRBUF_INIT, url_sb = STRBUF_INIT,
			private_ref_sb = STRBUF_INIT, marksfilename_sb = STRBUF_INIT,
			notes_ref_sb = STRBUF_INIT;
	static struct remote *remote;
	const char *url_in;

	setup_git_directory();
	if (argc < 2 || argc > 3) {
		usage("git-remote-svn <remote-name> [<url>]");
		return 1;
	}

	remote = remote_get(argv[1]);
	url_in = (argc == 3) ? argv[2] : remote->url[0];

	if (starts_with(url_in, "file://")) {
		dump_from_file = 1;
		url = url_decode(url_in + sizeof("file://")-1);
	} else {
		dump_from_file = 0;
		end_url_with_slash(&url_sb, url_in);
		url = url_sb.buf;
	}

	strbuf_addf(&private_ref_sb, "refs/svn/%s/master", remote->name);
	private_ref = private_ref_sb.buf;

	strbuf_addf(&notes_ref_sb, "refs/notes/%s/revs", remote->name);
	notes_ref = notes_ref_sb.buf;

	strbuf_addf(&marksfilename_sb, "%s/info/fast-import/remote-svn/%s.marks",
		get_git_dir(), remote->name);
	marksfilename = marksfilename_sb.buf;

	while (1) {
		if (strbuf_getline_lf(&buf, stdin) == EOF) {
			if (ferror(stdin))
				die("Error reading command stream");
			else
				die("Unexpected end of command stream");
		}
		if (do_command(&buf))
			break;
		strbuf_reset(&buf);
	}

	strbuf_release(&buf);
	strbuf_release(&url_sb);
	strbuf_release(&private_ref_sb);
	strbuf_release(&notes_ref_sb);
	strbuf_release(&marksfilename_sb);
	return 0;
}
Commit	Line	Data
68f64ff8	1	#include "cache.h"
fb58c8d5	2	#include "refs.h"
68f64ff8	3	#include "remote.h"
cbd53a21	4	#include "object-store.h"
68f64ff8 FA	5	#include "strbuf.h"
68f64ff8 FA	6	#include "url.h"
d807c4a0	7	#include "exec-cmd.h"
68f64ff8 FA	8	#include "run-command.h"
	9	#include "vcs-svn/svndump.h"
	10	#include "notes.h"
	11	#include "argv-array.h"
	12
	13	static const char *url;
f6529de9	14	static int dump_from_file;
68f64ff8 FA	15	static const char *private_ref;
68f64ff8 FA	16	static const char *remote_ref = "refs/heads/master";
8e43a1d0 FA	17	static const char marksfilename, notes_ref;
8e43a1d0 FA	18	struct rev_note { unsigned int rev_nr; };
68f64ff8 FA	19
	20	static int cmd_capabilities(const char *line);
	21	static int cmd_import(const char *line);
	22	static int cmd_list(const char *line);
	23
	24	typedef int (input_command_handler)(const char );
	25	struct input_command_entry {
	26	const char *name;
	27	input_command_handler fn;
	28	unsigned char batchable; /* whether the command starts or is part of a batch */
	29	};
	30
	31	static const struct input_command_entry input_command_list[] = {
	32	{ "capabilities", cmd_capabilities, 0 },
	33	{ "import", cmd_import, 1 },
	34	{ "list", cmd_list, 0 },
	35	{ NULL, NULL }
	36	};
	37
	38	static int cmd_capabilities(const char *line)
	39	{
	40	printf("import\n");
	41	printf("bidi-import\n");
	42	printf("refspec %s:%s\n\n", remote_ref, private_ref);
	43	fflush(stdout);
	44	return 0;
	45	}
	46
	47	static void terminate_batch(void)
	48	{
	49	/* terminate a current batch's fast-import stream */
	50	printf("done\n");
	51	fflush(stdout);
	52	}
	53
8e43a1d0	54	/* NOTE: 'ref' refers to a git reference, while 'rev' refers to a svn revision. */
5ee8a954	55	static char read_ref_note(const struct object_id oid)
8e43a1d0	56	{
9ef72230	57	const struct object_id *note_oid;
8e43a1d0 FA	58	char *msg = NULL;
	59	unsigned long msglen;
	60	enum object_type type;
	61
	62	init_notes(NULL, notes_ref, NULL, 0);
5ee8a954	63	if (!(note_oid = get_note(NULL, oid)))
8e43a1d0	64	return NULL; /* note tree not found */
b4f5aca4	65	if (!(msg = read_object_file(note_oid, &type, &msglen)))
8e43a1d0 FA	66	error("Empty notes tree. %s", notes_ref);
	67	else if (!msglen \|\| type != OBJ_BLOB) {
	68	error("Note contains unusable content. "
	69	"Is something else using this notes tree? %s", notes_ref);
6a83d902	70	FREE_AND_NULL(msg);
8e43a1d0 FA	71	}
	72	free_notes(NULL);
	73	return msg;
	74	}
	75
	76	static int parse_rev_note(const char msg, struct rev_note res)
	77	{
	78	const char key, value, *end;
	79	size_t len;
	80
	81	while (*msg) {
2c5495f7 RM	82	end = strchrnul(msg, '\n');
2c5495f7 RM	83	len = end - msg;
8e43a1d0 FA	84
8e43a1d0 FA	85	key = "Revision-number: ";
59556548	86	if (starts_with(msg, key)) {
8e43a1d0 FA	87	long i;
	88	char *end;
	89	value = msg + strlen(key);
	90	i = strtol(value, &end, 0);
	91	if (end == value \|\| i < 0 \|\| i > UINT32_MAX)
	92	return -1;
	93	res->rev_nr = i;
bfae342c	94	return 0;
8e43a1d0 FA	95	}
	96	msg += len + 1;
	97	}
bfae342c JK	98	/* didn't find it */
bfae342c JK	99	return -1;
8e43a1d0 FA	100	}
8e43a1d0 FA	101
490bc83a	102	static int note2mark_cb(const struct object_id *object_oid,
490bc83a	103	const struct object_id note_oid, char note_path,
5bfc76b5 FA	104	void *cb_data)
	105	{
	106	FILE file = (FILE )cb_data;
	107	char *msg;
	108	unsigned long msglen;
	109	enum object_type type;
	110	struct rev_note note;
	111
b4f5aca4	112	if (!(msg = read_object_file(note_oid, &type, &msglen)) \|\|
5bfc76b5 FA	113	!msglen \|\| type != OBJ_BLOB) {
	114	free(msg);
	115	return 1;
	116	}
	117	if (parse_rev_note(msg, &note))
	118	return 2;
490bc83a	119	if (fprintf(file, ":%d %s\n", note.rev_nr, oid_to_hex(object_oid)) < 1)
5bfc76b5 FA	120	return 3;
	121	return 0;
	122	}
	123
	124	static void regenerate_marks(void)
	125	{
	126	int ret;
23a9e071	127	FILE *marksfile = xfopen(marksfilename, "w+");
5bfc76b5	128
5bfc76b5 FA	129	ret = for_each_note(NULL, 0, note2mark_cb, marksfile);
	130	if (ret)
	131	die("Regeneration of marks failed, returned %d.", ret);
	132	fclose(marksfile);
	133	}
	134
	135	static void check_or_regenerate_marks(int latestrev)
	136	{
	137	FILE *marksfile;
	138	struct strbuf sb = STRBUF_INIT;
	139	struct strbuf line = STRBUF_INIT;
	140	int found = 0;
	141
	142	if (latestrev < 1)
	143	return;
	144
	145	init_notes(NULL, notes_ref, NULL, 0);
	146	marksfile = fopen(marksfilename, "r");
	147	if (!marksfile) {
	148	regenerate_marks();
23a9e071	149	marksfile = xfopen(marksfilename, "r");
5bfc76b5 FA	150	fclose(marksfile);
	151	} else {
	152	strbuf_addf(&sb, ":%d ", latestrev);
8f309aeb	153	while (strbuf_getline_lf(&line, marksfile) != EOF) {
59556548	154	if (starts_with(line.buf, sb.buf)) {
5bfc76b5 FA	155	found++;
	156	break;
	157	}
	158	}
	159	fclose(marksfile);
	160	if (!found)
	161	regenerate_marks();
	162	}
	163	free_notes(NULL);
	164	strbuf_release(&sb);
	165	strbuf_release(&line);
	166	}
	167
68f64ff8 FA	168	static int cmd_import(const char *line)
	169	{
	170	int code;
	171	int dumpin_fd;
8e43a1d0	172	char *note_msg;
5ee8a954	173	struct object_id head_oid;
8e43a1d0	174	unsigned int startrev;
d3180279	175	struct child_process svndump_proc = CHILD_PROCESS_INIT;
1cefa143	176	const char *command = "svnrdump";
68f64ff8	177
34c290a6	178	if (read_ref(private_ref, &head_oid))
8e43a1d0 FA	179	startrev = 0;
8e43a1d0 FA	180	else {
5ee8a954	181	note_msg = read_ref_note(&head_oid);
8e43a1d0 FA	182	if(note_msg == NULL) {
	183	warning("No note found for %s.", private_ref);
	184	startrev = 0;
	185	} else {
	186	struct rev_note note = { 0 };
	187	if (parse_rev_note(note_msg, &note))
	188	die("Revision number couldn't be parsed from note.");
	189	startrev = note.rev_nr + 1;
	190	free(note_msg);
	191	}
	192	}
5bfc76b5	193	check_or_regenerate_marks(startrev - 1);
8e43a1d0	194
f6529de9 FA	195	if (dump_from_file) {
	196	dumpin_fd = open(url, O_RDONLY);
	197	if(dumpin_fd < 0)
	198	die_errno("Couldn't open svn dump file %s.", url);
	199	} else {
f6529de9	200	svndump_proc.out = -1;
1cefa143 RS	201	argv_array_push(&svndump_proc.args, command);
	202	argv_array_push(&svndump_proc.args, "dump");
	203	argv_array_push(&svndump_proc.args, url);
	204	argv_array_pushf(&svndump_proc.args, "-r%u:HEAD", startrev);
f6529de9 FA	205
	206	code = start_command(&svndump_proc);
	207	if (code)
1cefa143	208	die("Unable to start %s, code %d", command, code);
f6529de9 FA	209	dumpin_fd = svndump_proc.out;
f6529de9 FA	210	}
8d7cd8eb FA	211	/* setup marks file import/export */
	212	printf("feature import-marks-if-exists=%s\n"
	213	"feature export-marks=%s\n", marksfilename, marksfilename);
	214
68f64ff8	215	svndump_init_fd(dumpin_fd, STDIN_FILENO);
8e43a1d0	216	svndump_read(url, private_ref, notes_ref);
68f64ff8 FA	217	svndump_deinit();
	218	svndump_reset();
	219
	220	close(dumpin_fd);
f6529de9 FA	221	if (!dump_from_file) {
	222	code = finish_command(&svndump_proc);
	223	if (code)
1cefa143	224	warning("%s, returned %d", command, code);
f6529de9	225	}
68f64ff8 FA	226
	227	return 0;
	228	}
	229
	230	static int cmd_list(const char *line)
	231	{
	232	printf("? %s\n\n", remote_ref);
	233	fflush(stdout);
	234	return 0;
	235	}
	236
	237	static int do_command(struct strbuf *line)
	238	{
	239	const struct input_command_entry *p = input_command_list;
	240	static struct string_list batchlines = STRING_LIST_INIT_DUP;
	241	static const struct input_command_entry *batch_cmd;
	242	/*
	243	* commands can be grouped together in a batch.
	244	* Batches are ended by \n. If no batch is active the program ends.
	245	* During a batch all lines are buffered and passed to the handler function
	246	* when the batch is terminated.
	247	*/
	248	if (line->len == 0) {
	249	if (batch_cmd) {
	250	struct string_list_item *item;
	251	for_each_string_list_item(item, &batchlines)
	252	batch_cmd->fn(item->string);
	253	terminate_batch();
	254	batch_cmd = NULL;
	255	string_list_clear(&batchlines, 0);
	256	return 0; /* end of the batch, continue reading other commands. */
	257	}
	258	return 1; /* end of command stream, quit */
	259	}
	260	if (batch_cmd) {
59556548	261	if (!starts_with(batch_cmd->name, line->buf))
68f64ff8 FA	262	die("Active %s batch interrupted by %s", batch_cmd->name, line->buf);
	263	/* buffer batch lines */
	264	string_list_append(&batchlines, line->buf);
	265	return 0;
	266	}
	267
	268	for (p = input_command_list; p->name; p++) {
59556548	269	if (starts_with(line->buf, p->name) && (strlen(p->name) == line->len \|\|
68f64ff8 FA	270	line->buf[strlen(p->name)] == ' ')) {
	271	if (p->batchable) {
	272	batch_cmd = p;
	273	string_list_append(&batchlines, line->buf);
	274	return 0;
	275	}
	276	return p->fn(line->buf);
	277	}
	278	}
	279	die("Unknown command '%s'\n", line->buf);
	280	return 0;
	281	}
	282
3f2e2297	283	int cmd_main(int argc, const char **argv)
68f64ff8 FA	284	{
68f64ff8 FA	285	struct strbuf buf = STRBUF_INIT, url_sb = STRBUF_INIT,
8e43a1d0 FA	286	private_ref_sb = STRBUF_INIT, marksfilename_sb = STRBUF_INIT,
8e43a1d0 FA	287	notes_ref_sb = STRBUF_INIT;
68f64ff8 FA	288	static struct remote *remote;
	289	const char *url_in;
	290
68f64ff8 FA	291	setup_git_directory();
	292	if (argc < 2 \|\| argc > 3) {
	293	usage("git-remote-svn <remote-name> [<url>]");
	294	return 1;
	295	}
	296
	297	remote = remote_get(argv[1]);
	298	url_in = (argc == 3) ? argv[2] : remote->url[0];
	299
59556548	300	if (starts_with(url_in, "file://")) {
f6529de9 FA	301	dump_from_file = 1;
	302	url = url_decode(url_in + sizeof("file://")-1);
	303	} else {
	304	dump_from_file = 0;
	305	end_url_with_slash(&url_sb, url_in);
	306	url = url_sb.buf;
	307	}
68f64ff8 FA	308
	309	strbuf_addf(&private_ref_sb, "refs/svn/%s/master", remote->name);
	310	private_ref = private_ref_sb.buf;
	311
8e43a1d0 FA	312	strbuf_addf(&notes_ref_sb, "refs/notes/%s/revs", remote->name);
	313	notes_ref = notes_ref_sb.buf;
	314
8d7cd8eb FA	315	strbuf_addf(&marksfilename_sb, "%s/info/fast-import/remote-svn/%s.marks",
	316	get_git_dir(), remote->name);
	317	marksfilename = marksfilename_sb.buf;
	318
68f64ff8	319	while (1) {
8f309aeb	320	if (strbuf_getline_lf(&buf, stdin) == EOF) {
68f64ff8 FA	321	if (ferror(stdin))
	322	die("Error reading command stream");
	323	else
	324	die("Unexpected end of command stream");
	325	}
	326	if (do_command(&buf))
	327	break;
	328	strbuf_reset(&buf);
	329	}
	330
	331	strbuf_release(&buf);
	332	strbuf_release(&url_sb);
	333	strbuf_release(&private_ref_sb);
8e43a1d0	334	strbuf_release(&notes_ref_sb);
8d7cd8eb	335	strbuf_release(&marksfilename_sb);
68f64ff8 FA	336	return 0;
68f64ff8 FA	337	}