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

#include "cache.h"
#include "remote.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 unsigned char sha1[20])
{
	const unsigned char *note_sha1;
	char *msg = NULL;
	unsigned long msglen;
	enum object_type type;

	init_notes(NULL, notes_ref, NULL, 0);
	if (!(note_sha1 = get_note(NULL, sha1)))
		return NULL;	/* note tree not found */
	if (!(msg = read_sha1_file(note_sha1, &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(msg);
		msg = NULL;
	}
	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 = strchr(msg, '\n');
		len = end ? end - msg : strlen(msg);

		key = "Revision-number: ";
		if (!prefixcmp(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;
		}
		msg += len + 1;
	}
	return 0;
}

static int cmd_import(const char *line)
{
	int code;
	int dumpin_fd;
	char *note_msg;
	unsigned char head_sha1[20];
	unsigned int startrev;
	struct argv_array svndump_argv = ARGV_ARRAY_INIT;
	struct child_process svndump_proc;

	if (read_ref(private_ref, head_sha1))
		startrev = 0;
	else {
		note_msg = read_ref_note(head_sha1);
		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);
		}
	}

	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 {
		memset(&svndump_proc, 0, sizeof(struct child_process));
		svndump_proc.out = -1;
		argv_array_push(&svndump_argv, "svnrdump");
		argv_array_push(&svndump_argv, "dump");
		argv_array_push(&svndump_argv, url);
		argv_array_pushf(&svndump_argv, "-r%u:HEAD", startrev);
		svndump_proc.argv = svndump_argv.argv;

		code = start_command(&svndump_proc);
		if (code)
			die("Unable to start %s, code %d", svndump_proc.argv[0], 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", svndump_proc.argv[0], code);
		argv_array_clear(&svndump_argv);
	}

	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 (prefixcmp(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 (!prefixcmp(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 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;

	git_extract_argv0_path(argv[0]);
	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 (!prefixcmp(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(&buf, stdin, '\n') == 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 FA	1	#include "cache.h"
	2	#include "remote.h"
	3	#include "strbuf.h"
	4	#include "url.h"
	5	#include "exec_cmd.h"
	6	#include "run-command.h"
	7	#include "vcs-svn/svndump.h"
	8	#include "notes.h"
	9	#include "argv-array.h"
	10
	11	static const char *url;
f6529de9	12	static int dump_from_file;
68f64ff8 FA	13	static const char *private_ref;
68f64ff8 FA	14	static const char *remote_ref = "refs/heads/master";
8e43a1d0 FA	15	static const char marksfilename, notes_ref;
8e43a1d0 FA	16	struct rev_note { unsigned int rev_nr; };
68f64ff8 FA	17
	18	static int cmd_capabilities(const char *line);
	19	static int cmd_import(const char *line);
	20	static int cmd_list(const char *line);
	21
	22	typedef int (input_command_handler)(const char );
	23	struct input_command_entry {
	24	const char *name;
	25	input_command_handler fn;
	26	unsigned char batchable; /* whether the command starts or is part of a batch */
	27	};
	28
	29	static const struct input_command_entry input_command_list[] = {
	30	{ "capabilities", cmd_capabilities, 0 },
	31	{ "import", cmd_import, 1 },
	32	{ "list", cmd_list, 0 },
	33	{ NULL, NULL }
	34	};
	35
	36	static int cmd_capabilities(const char *line)
	37	{
	38	printf("import\n");
	39	printf("bidi-import\n");
	40	printf("refspec %s:%s\n\n", remote_ref, private_ref);
	41	fflush(stdout);
	42	return 0;
	43	}
	44
	45	static void terminate_batch(void)
	46	{
	47	/* terminate a current batch's fast-import stream */
	48	printf("done\n");
	49	fflush(stdout);
	50	}
	51
8e43a1d0 FA	52	/* NOTE: 'ref' refers to a git reference, while 'rev' refers to a svn revision. */
	53	static char *read_ref_note(const unsigned char sha1[20])
	54	{
	55	const unsigned char *note_sha1;
	56	char *msg = NULL;
	57	unsigned long msglen;
	58	enum object_type type;
	59
	60	init_notes(NULL, notes_ref, NULL, 0);
	61	if (!(note_sha1 = get_note(NULL, sha1)))
	62	return NULL; /* note tree not found */
	63	if (!(msg = read_sha1_file(note_sha1, &type, &msglen)))
	64	error("Empty notes tree. %s", notes_ref);
	65	else if (!msglen \|\| type != OBJ_BLOB) {
	66	error("Note contains unusable content. "
	67	"Is something else using this notes tree? %s", notes_ref);
	68	free(msg);
	69	msg = NULL;
	70	}
	71	free_notes(NULL);
	72	return msg;
	73	}
	74
	75	static int parse_rev_note(const char msg, struct rev_note res)
	76	{
	77	const char key, value, *end;
	78	size_t len;
	79
	80	while (*msg) {
	81	end = strchr(msg, '\n');
	82	len = end ? end - msg : strlen(msg);
	83
	84	key = "Revision-number: ";
	85	if (!prefixcmp(msg, key)) {
	86	long i;
	87	char *end;
	88	value = msg + strlen(key);
	89	i = strtol(value, &end, 0);
	90	if (end == value \|\| i < 0 \|\| i > UINT32_MAX)
	91	return -1;
	92	res->rev_nr = i;
	93	}
	94	msg += len + 1;
	95	}
	96	return 0;
	97	}
	98
68f64ff8 FA	99	static int cmd_import(const char *line)
	100	{
	101	int code;
	102	int dumpin_fd;
8e43a1d0 FA	103	char *note_msg;
	104	unsigned char head_sha1[20];
	105	unsigned int startrev;
68f64ff8 FA	106	struct argv_array svndump_argv = ARGV_ARRAY_INIT;
	107	struct child_process svndump_proc;
	108
8e43a1d0 FA	109	if (read_ref(private_ref, head_sha1))
	110	startrev = 0;
	111	else {
	112	note_msg = read_ref_note(head_sha1);
	113	if(note_msg == NULL) {
	114	warning("No note found for %s.", private_ref);
	115	startrev = 0;
	116	} else {
	117	struct rev_note note = { 0 };
	118	if (parse_rev_note(note_msg, &note))
	119	die("Revision number couldn't be parsed from note.");
	120	startrev = note.rev_nr + 1;
	121	free(note_msg);
	122	}
	123	}
	124
f6529de9 FA	125	if (dump_from_file) {
	126	dumpin_fd = open(url, O_RDONLY);
	127	if(dumpin_fd < 0)
	128	die_errno("Couldn't open svn dump file %s.", url);
	129	} else {
	130	memset(&svndump_proc, 0, sizeof(struct child_process));
	131	svndump_proc.out = -1;
	132	argv_array_push(&svndump_argv, "svnrdump");
	133	argv_array_push(&svndump_argv, "dump");
	134	argv_array_push(&svndump_argv, url);
	135	argv_array_pushf(&svndump_argv, "-r%u:HEAD", startrev);
	136	svndump_proc.argv = svndump_argv.argv;
	137
	138	code = start_command(&svndump_proc);
	139	if (code)
	140	die("Unable to start %s, code %d", svndump_proc.argv[0], code);
	141	dumpin_fd = svndump_proc.out;
	142	}
8d7cd8eb FA	143	/* setup marks file import/export */
	144	printf("feature import-marks-if-exists=%s\n"
	145	"feature export-marks=%s\n", marksfilename, marksfilename);
	146
68f64ff8	147	svndump_init_fd(dumpin_fd, STDIN_FILENO);
8e43a1d0	148	svndump_read(url, private_ref, notes_ref);
68f64ff8 FA	149	svndump_deinit();
	150	svndump_reset();
	151
	152	close(dumpin_fd);
f6529de9 FA	153	if (!dump_from_file) {
	154	code = finish_command(&svndump_proc);
	155	if (code)
	156	warning("%s, returned %d", svndump_proc.argv[0], code);
	157	argv_array_clear(&svndump_argv);
	158	}
68f64ff8 FA	159
	160	return 0;
	161	}
	162
	163	static int cmd_list(const char *line)
	164	{
	165	printf("? %s\n\n", remote_ref);
	166	fflush(stdout);
	167	return 0;
	168	}
	169
	170	static int do_command(struct strbuf *line)
	171	{
	172	const struct input_command_entry *p = input_command_list;
	173	static struct string_list batchlines = STRING_LIST_INIT_DUP;
	174	static const struct input_command_entry *batch_cmd;
	175	/*
	176	* commands can be grouped together in a batch.
	177	* Batches are ended by \n. If no batch is active the program ends.
	178	* During a batch all lines are buffered and passed to the handler function
	179	* when the batch is terminated.
	180	*/
	181	if (line->len == 0) {
	182	if (batch_cmd) {
	183	struct string_list_item *item;
	184	for_each_string_list_item(item, &batchlines)
	185	batch_cmd->fn(item->string);
	186	terminate_batch();
	187	batch_cmd = NULL;
	188	string_list_clear(&batchlines, 0);
	189	return 0; /* end of the batch, continue reading other commands. */
	190	}
	191	return 1; /* end of command stream, quit */
	192	}
	193	if (batch_cmd) {
	194	if (prefixcmp(batch_cmd->name, line->buf))
	195	die("Active %s batch interrupted by %s", batch_cmd->name, line->buf);
	196	/* buffer batch lines */
	197	string_list_append(&batchlines, line->buf);
	198	return 0;
	199	}
	200
	201	for (p = input_command_list; p->name; p++) {
	202	if (!prefixcmp(line->buf, p->name) && (strlen(p->name) == line->len \|\|
	203	line->buf[strlen(p->name)] == ' ')) {
	204	if (p->batchable) {
	205	batch_cmd = p;
	206	string_list_append(&batchlines, line->buf);
	207	return 0;
	208	}
	209	return p->fn(line->buf);
	210	}
	211	}
	212	die("Unknown command '%s'\n", line->buf);
	213	return 0;
	214	}
	215
	216	int main(int argc, const char **argv)
	217	{
	218	struct strbuf buf = STRBUF_INIT, url_sb = STRBUF_INIT,
8e43a1d0 FA	219	private_ref_sb = STRBUF_INIT, marksfilename_sb = STRBUF_INIT,
8e43a1d0 FA	220	notes_ref_sb = STRBUF_INIT;
68f64ff8 FA	221	static struct remote *remote;
	222	const char *url_in;
	223
	224	git_extract_argv0_path(argv[0]);
	225	setup_git_directory();
	226	if (argc < 2 \|\| argc > 3) {
	227	usage("git-remote-svn <remote-name> [<url>]");
	228	return 1;
	229	}
	230
	231	remote = remote_get(argv[1]);
	232	url_in = (argc == 3) ? argv[2] : remote->url[0];
	233
f6529de9 FA	234	if (!prefixcmp(url_in, "file://")) {
	235	dump_from_file = 1;
	236	url = url_decode(url_in + sizeof("file://")-1);
	237	} else {
	238	dump_from_file = 0;
	239	end_url_with_slash(&url_sb, url_in);
	240	url = url_sb.buf;
	241	}
68f64ff8 FA	242
	243	strbuf_addf(&private_ref_sb, "refs/svn/%s/master", remote->name);
	244	private_ref = private_ref_sb.buf;
	245
8e43a1d0 FA	246	strbuf_addf(&notes_ref_sb, "refs/notes/%s/revs", remote->name);
	247	notes_ref = notes_ref_sb.buf;
	248
8d7cd8eb FA	249	strbuf_addf(&marksfilename_sb, "%s/info/fast-import/remote-svn/%s.marks",
	250	get_git_dir(), remote->name);
	251	marksfilename = marksfilename_sb.buf;
	252
68f64ff8 FA	253	while (1) {
	254	if (strbuf_getline(&buf, stdin, '\n') == EOF) {
	255	if (ferror(stdin))
	256	die("Error reading command stream");
	257	else
	258	die("Unexpected end of command stream");
	259	}
	260	if (do_command(&buf))
	261	break;
	262	strbuf_reset(&buf);
	263	}
	264
	265	strbuf_release(&buf);
	266	strbuf_release(&url_sb);
	267	strbuf_release(&private_ref_sb);
8e43a1d0	268	strbuf_release(&notes_ref_sb);
8d7cd8eb	269	strbuf_release(&marksfilename_sb);
68f64ff8 FA	270	return 0;
68f64ff8 FA	271	}