[thirdparty/git.git] / http-pull.c

#include "cache.h"
#include "commit.h"

#include "pull.h"

#include <curl/curl.h>
#include <curl/easy.h>

#if LIBCURL_VERSION_NUM < 0x070704
#define curl_global_cleanup() do { /* nothing */ } while(0)
#endif
#if LIBCURL_VERSION_NUM < 0x070800
#define curl_global_init(a) do { /* nothing */ } while(0)
#endif

static CURL *curl;

static char *base;

static SHA_CTX c;
static z_stream stream;

static int local;
static int zret;

static int curl_ssl_verify;

struct buffer
{
        size_t posn;
        size_t size;
        void *buffer;
};

static size_t fwrite_buffer(void *ptr, size_t eltsize, size_t nmemb,
                            struct buffer *buffer)
{
        size_t size = eltsize * nmemb;
        if (size > buffer->size - buffer->posn)
                size = buffer->size - buffer->posn;
        memcpy(buffer->buffer + buffer->posn, ptr, size);
        buffer->posn += size;
        return size;
}

static size_t fwrite_sha1_file(void *ptr, size_t eltsize, size_t nmemb,
			       void *data)
{
	unsigned char expn[4096];
	size_t size = eltsize * nmemb;
	int posn = 0;
	do {
		ssize_t retval = write(local, ptr + posn, size - posn);
		if (retval < 0)
			return posn;
		posn += retval;
	} while (posn < size);

	stream.avail_in = size;
	stream.next_in = ptr;
	do {
		stream.next_out = expn;
		stream.avail_out = sizeof(expn);
		zret = inflate(&stream, Z_SYNC_FLUSH);
		SHA1_Update(&c, expn, sizeof(expn) - stream.avail_out);
	} while (stream.avail_in && zret == Z_OK);
	return size;
}

static int got_indices = 0;

static struct packed_git *packs = NULL;

static int fetch_index(unsigned char *sha1)
{
	char *filename;
	char *url;

	FILE *indexfile;

	if (has_pack_index(sha1))
		return 0;

	if (get_verbosely)
		fprintf(stderr, "Getting index for pack %s\n",
			sha1_to_hex(sha1));
	
	url = xmalloc(strlen(base) + 64);
	sprintf(url, "%s/objects/pack/pack-%s.idx",
		base, sha1_to_hex(sha1));
	
	filename = sha1_pack_index_name(sha1);
	indexfile = fopen(filename, "w");
	if (!indexfile)
		return error("Unable to open local file %s for pack index",
			     filename);

	curl_easy_setopt(curl, CURLOPT_FILE, indexfile);
	curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, fwrite);
	curl_easy_setopt(curl, CURLOPT_URL, url);
	
	if (curl_easy_perform(curl)) {
		fclose(indexfile);
		return error("Unable to get pack index %s", url);
	}

	fclose(indexfile);
	return 0;
}

static int setup_index(unsigned char *sha1)
{
	struct packed_git *new_pack;
	if (has_pack_file(sha1))
		return 0; // don't list this as something we can get

	if (fetch_index(sha1))
		return -1;

	new_pack = parse_pack_index(sha1);
	new_pack->next = packs;
	packs = new_pack;
	return 0;
}

static int fetch_indices(void)
{
	unsigned char sha1[20];
	char *url;
	struct buffer buffer;
	char *data;
	int i = 0;

	if (got_indices)
		return 0;

	data = xmalloc(4096);
	buffer.size = 4096;
	buffer.posn = 0;
	buffer.buffer = data;

	if (get_verbosely)
		fprintf(stderr, "Getting pack list\n");
	
	url = xmalloc(strlen(base) + 21);
	sprintf(url, "%s/objects/info/packs", base);

	curl_easy_setopt(curl, CURLOPT_FILE, &buffer);
	curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
	curl_easy_setopt(curl, CURLOPT_URL, url);
	
	if (curl_easy_perform(curl)) {
		return error("Unable to get pack index %s", url);
	}

	do {
		switch (data[i]) {
		case 'P':
			i++;
			if (i + 52 < buffer.posn &&
			    !strncmp(data + i, " pack-", 6) &&
			    !strncmp(data + i + 46, ".pack\n", 6)) {
				get_sha1_hex(data + i + 6, sha1);
				setup_index(sha1);
				i += 51;
				break;
			}
		default:
			while (data[i] != '\n')
				i++;
		}
		i++;
	} while (i < buffer.posn);

	got_indices = 1;
	return 0;
}

static int fetch_pack(unsigned char *sha1)
{
	char *url;
	struct packed_git *target;
	struct packed_git **lst;
	FILE *packfile;
	char *filename;

	if (fetch_indices())
		return -1;
	target = find_sha1_pack(sha1, packs);
	if (!target)
		return error("Couldn't get %s: not separate or in any pack",
			     sha1_to_hex(sha1));

	if (get_verbosely) {
		fprintf(stderr, "Getting pack %s\n",
			sha1_to_hex(target->sha1));
		fprintf(stderr, " which contains %s\n",
			sha1_to_hex(sha1));
	}

	url = xmalloc(strlen(base) + 65);
	sprintf(url, "%s/objects/pack/pack-%s.pack",
		base, sha1_to_hex(target->sha1));

	filename = sha1_pack_name(target->sha1);
	packfile = fopen(filename, "w");
	if (!packfile)
		return error("Unable to open local file %s for pack",
			     filename);

	curl_easy_setopt(curl, CURLOPT_FILE, packfile);
	curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, fwrite);
	curl_easy_setopt(curl, CURLOPT_URL, url);
	
	if (curl_easy_perform(curl)) {
		fclose(packfile);
		return error("Unable to get pack file %s", url);
	}

	fclose(packfile);

	lst = &packs;
	while (*lst != target)
		lst = &((*lst)->next);
	*lst = (*lst)->next;

	install_packed_git(target);

	return 0;
}

int fetch(unsigned char *sha1)
{
	char *hex = sha1_to_hex(sha1);
	char *filename = sha1_file_name(sha1);
	unsigned char real_sha1[20];
	char *url;
	char *posn;

	local = open(filename, O_WRONLY | O_CREAT | O_EXCL, 0666);

	if (local < 0)
		return error("Couldn't open local object %s\n", filename);

	memset(&stream, 0, sizeof(stream));

	inflateInit(&stream);

	SHA1_Init(&c);

	curl_easy_setopt(curl, CURLOPT_FAILONERROR, 1);
	curl_easy_setopt(curl, CURLOPT_FILE, NULL);
	curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, fwrite_sha1_file);

	url = xmalloc(strlen(base) + 50);
	strcpy(url, base);
	posn = url + strlen(base);
	strcpy(posn, "objects/");
	posn += 8;
	memcpy(posn, hex, 2);
	posn += 2;
	*(posn++) = '/';
	strcpy(posn, hex + 2);

	curl_easy_setopt(curl, CURLOPT_URL, url);

	if (curl_easy_perform(curl)) {
		unlink(filename);
		if (fetch_pack(sha1))
			return error("Tried %s", url);
		return 0;
	}

	close(local);
	inflateEnd(&stream);
	SHA1_Final(real_sha1, &c);
	if (zret != Z_STREAM_END) {
		unlink(filename);
		return error("File %s (%s) corrupt\n", hex, url);
	}
	if (memcmp(sha1, real_sha1, 20)) {
		unlink(filename);
		return error("File %s has bad hash\n", hex);
	}
	
	pull_say("got %s\n", hex);
	return 0;
}

int fetch_ref(char *ref, unsigned char *sha1)
{
        char *url, *posn;
        char hex[42];
        struct buffer buffer;
        buffer.size = 41;
        buffer.posn = 0;
        buffer.buffer = hex;
        hex[41] = '\0';
        
        curl_easy_setopt(curl, CURLOPT_FILE, &buffer);
        curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);

        url = xmalloc(strlen(base) + 6 + strlen(ref));
        strcpy(url, base);
        posn = url + strlen(base);
        strcpy(posn, "refs/");
        posn += 5;
        strcpy(posn, ref);

        curl_easy_setopt(curl, CURLOPT_URL, url);

        if (curl_easy_perform(curl))
                return error("Couldn't get %s for %s\n", url, ref);

        hex[40] = '\0';
        get_sha1_hex(hex, sha1);
        return 0;
}

int main(int argc, char **argv)
{
	char *commit_id;
	char *url;
	int arg = 1;

	while (arg < argc && argv[arg][0] == '-') {
		if (argv[arg][1] == 't') {
			get_tree = 1;
		} else if (argv[arg][1] == 'c') {
			get_history = 1;
		} else if (argv[arg][1] == 'a') {
			get_all = 1;
			get_tree = 1;
			get_history = 1;
		} else if (argv[arg][1] == 'v') {
			get_verbosely = 1;
		} else if (argv[arg][1] == 'w') {
			write_ref = argv[arg + 1];
			arg++;
		}
		arg++;
	}
	if (argc < arg + 2) {
		usage("git-http-pull [-c] [-t] [-a] [-d] [-v] [--recover] [-w ref] commit-id url");
		return 1;
	}
	commit_id = argv[arg];
	url = argv[arg + 1];

	curl_global_init(CURL_GLOBAL_ALL);

	curl = curl_easy_init();

	curl_ssl_verify = gitenv("GIT_SSL_NO_VERIFY") ? 0 : 1;
	curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, curl_ssl_verify);
#if LIBCURL_VERSION_NUM >= 0x070907
	curl_easy_setopt(curl, CURLOPT_NETRC, CURL_NETRC_OPTIONAL);
#endif

	base = url;

	if (pull(commit_id))
		return 1;

	curl_global_cleanup();
	return 0;
}
Commit	Line	Data
6eb7ed54 DB	1	#include "cache.h"
6eb7ed54 DB	2	#include "commit.h"
6eb7ed54	3
4250a5e5 DB	4	#include "pull.h"
4250a5e5 DB	5
6eb7ed54 DB	6	#include <curl/curl.h>
	7	#include <curl/easy.h>
	8
4a30976e JS	9	#if LIBCURL_VERSION_NUM < 0x070704
	10	#define curl_global_cleanup() do { /* nothing */ } while(0)
	11	#endif
	12	#if LIBCURL_VERSION_NUM < 0x070800
	13	#define curl_global_init(a) do { /* nothing */ } while(0)
	14	#endif
4a30976e	15
6eb7ed54 DB	16	static CURL *curl;
	17
	18	static char *base;
	19
6eb7ed54 DB	20	static SHA_CTX c;
	21	static z_stream stream;
	22
	23	static int local;
	24	static int zret;
	25
3dcb90f5 DT	26	static int curl_ssl_verify;
3dcb90f5 DT	27
fa3e0655 DB	28	struct buffer
	29	{
	30	size_t posn;
	31	size_t size;
	32	void *buffer;
	33	};
	34
	35	static size_t fwrite_buffer(void *ptr, size_t eltsize, size_t nmemb,
182005b9 DB	36	struct buffer *buffer)
182005b9 DB	37	{
fa3e0655 DB	38	size_t size = eltsize * nmemb;
	39	if (size > buffer->size - buffer->posn)
	40	size = buffer->size - buffer->posn;
	41	memcpy(buffer->buffer + buffer->posn, ptr, size);
	42	buffer->posn += size;
	43	return size;
	44	}
	45
182005b9 DB	46	static size_t fwrite_sha1_file(void *ptr, size_t eltsize, size_t nmemb,
	47	void *data)
	48	{
bf0f910d	49	unsigned char expn[4096];
6eb7ed54 DB	50	size_t size = eltsize * nmemb;
	51	int posn = 0;
	52	do {
	53	ssize_t retval = write(local, ptr + posn, size - posn);
	54	if (retval < 0)
	55	return posn;
	56	posn += retval;
	57	} while (posn < size);
	58
	59	stream.avail_in = size;
	60	stream.next_in = ptr;
	61	do {
	62	stream.next_out = expn;
	63	stream.avail_out = sizeof(expn);
	64	zret = inflate(&stream, Z_SYNC_FLUSH);
	65	SHA1_Update(&c, expn, sizeof(expn) - stream.avail_out);
	66	} while (stream.avail_in && zret == Z_OK);
	67	return size;
	68	}
	69
182005b9 DB	70	static int got_indices = 0;
	71
	72	static struct packed_git *packs = NULL;
	73
	74	static int fetch_index(unsigned char *sha1)
	75	{
	76	char *filename;
	77	char *url;
	78
	79	FILE *indexfile;
	80
	81	if (has_pack_index(sha1))
	82	return 0;
	83
	84	if (get_verbosely)
	85	fprintf(stderr, "Getting index for pack %s\n",
	86	sha1_to_hex(sha1));
	87
	88	url = xmalloc(strlen(base) + 64);
	89	sprintf(url, "%s/objects/pack/pack-%s.idx",
	90	base, sha1_to_hex(sha1));
	91
	92	filename = sha1_pack_index_name(sha1);
	93	indexfile = fopen(filename, "w");
	94	if (!indexfile)
	95	return error("Unable to open local file %s for pack index",
	96	filename);
	97
	98	curl_easy_setopt(curl, CURLOPT_FILE, indexfile);
	99	curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, fwrite);
	100	curl_easy_setopt(curl, CURLOPT_URL, url);
	101
	102	if (curl_easy_perform(curl)) {
	103	fclose(indexfile);
	104	return error("Unable to get pack index %s", url);
	105	}
	106
	107	fclose(indexfile);
	108	return 0;
	109	}
	110
	111	static int setup_index(unsigned char *sha1)
	112	{
	113	struct packed_git *new_pack;
	114	if (has_pack_file(sha1))
	115	return 0; // don't list this as something we can get
	116
	117	if (fetch_index(sha1))
	118	return -1;
	119
	120	new_pack = parse_pack_index(sha1);
	121	new_pack->next = packs;
	122	packs = new_pack;
	123	return 0;
	124	}
	125
	126	static int fetch_indices(void)
	127	{
	128	unsigned char sha1[20];
	129	char *url;
	130	struct buffer buffer;
	131	char *data;
	132	int i = 0;
	133
134	if (got_indices)
135	return 0;
136
137	data = xmalloc(4096);
138	buffer.size = 4096;
139	buffer.posn = 0;
140	buffer.buffer = data;
141
142	if (get_verbosely)
143	fprintf(stderr, "Getting pack list\n");
144
145	url = xmalloc(strlen(base) + 21);
146	sprintf(url, "%s/objects/info/packs", base);
147
148	curl_easy_setopt(curl, CURLOPT_FILE, &buffer);
149	curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
150	curl_easy_setopt(curl, CURLOPT_URL, url);
151
152	if (curl_easy_perform(curl)) {
153	return error("Unable to get pack index %s", url);
154	}
155
156	do {
157	switch (data[i]) {
158	case 'P':
159	i++;
160	if (i + 52 < buffer.posn &&
161	!strncmp(data + i, " pack-", 6) &&
162	!strncmp(data + i + 46, ".pack\n", 6)) {
163	get_sha1_hex(data + i + 6, sha1);
164	setup_index(sha1);
165	i += 51;
166	break;
167	}
168	default:
169	while (data[i] != '\n')
170	i++;
171	}
172	i++;
173	} while (i < buffer.posn);
174
175	got_indices = 1;
176	return 0;
177	}
178
179	static int fetch_pack(unsigned char *sha1)
180	{
181	char *url;
182	struct packed_git *target;
183	struct packed_git **lst;
184	FILE *packfile;
185	char *filename;
186
187	if (fetch_indices())
188	return -1;
189	target = find_sha1_pack(sha1, packs);
190	if (!target)
191	return error("Couldn't get %s: not separate or in any pack",
192	sha1_to_hex(sha1));
193
194	if (get_verbosely) {
195	fprintf(stderr, "Getting pack %s\n",
196	sha1_to_hex(target->sha1));
197	fprintf(stderr, " which contains %s\n",
198	sha1_to_hex(sha1));
199	}
200
201	url = xmalloc(strlen(base) + 65);
202	sprintf(url, "%s/objects/pack/pack-%s.pack",
203	base, sha1_to_hex(target->sha1));
204
205	filename = sha1_pack_name(target->sha1);
206	packfile = fopen(filename, "w");
207	if (!packfile)
208	return error("Unable to open local file %s for pack",
209	filename);
210
211	curl_easy_setopt(curl, CURLOPT_FILE, packfile);
212	curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, fwrite);
213	curl_easy_setopt(curl, CURLOPT_URL, url);
214
215	if (curl_easy_perform(curl)) {
216	fclose(packfile);
217	return error("Unable to get pack file %s", url);
218	}
219
220	fclose(packfile);
221
222	lst = &packs;
223	while (*lst != target)
224	lst = &((*lst)->next);
225	lst = (lst)->next;
226
227	install_packed_git(target);
228
229	return 0;
230	}
231
4250a5e5	232	int fetch(unsigned char *sha1)
6eb7ed54 DB	233	{
	234	char *hex = sha1_to_hex(sha1);
	235	char *filename = sha1_file_name(sha1);
bf0f910d	236	unsigned char real_sha1[20];
6eb7ed54 DB	237	char *url;
	238	char *posn;
	239
6eb7ed54 DB	240	local = open(filename, O_WRONLY \| O_CREAT \| O_EXCL, 0666);
	241
	242	if (local < 0)
182005b9	243	return error("Couldn't open local object %s\n", filename);
6eb7ed54 DB	244
	245	memset(&stream, 0, sizeof(stream));
	246
	247	inflateInit(&stream);
	248
	249	SHA1_Init(&c);
	250
182005b9	251	curl_easy_setopt(curl, CURLOPT_FAILONERROR, 1);
6eb7ed54 DB	252	curl_easy_setopt(curl, CURLOPT_FILE, NULL);
	253	curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, fwrite_sha1_file);
	254
812666c8	255	url = xmalloc(strlen(base) + 50);
6eb7ed54 DB	256	strcpy(url, base);
	257	posn = url + strlen(base);
	258	strcpy(posn, "objects/");
	259	posn += 8;
	260	memcpy(posn, hex, 2);
	261	posn += 2;
	262	*(posn++) = '/';
	263	strcpy(posn, hex + 2);
	264
	265	curl_easy_setopt(curl, CURLOPT_URL, url);
	266
182005b9 DB	267	if (curl_easy_perform(curl)) {
	268	unlink(filename);
	269	if (fetch_pack(sha1))
	270	return error("Tried %s", url);
	271	return 0;
	272	}
6eb7ed54 DB	273
	274	close(local);
	275	inflateEnd(&stream);
	276	SHA1_Final(real_sha1, &c);
	277	if (zret != Z_STREAM_END) {
	278	unlink(filename);
	279	return error("File %s (%s) corrupt\n", hex, url);
	280	}
	281	if (memcmp(sha1, real_sha1, 20)) {
	282	unlink(filename);
	283	return error("File %s has bad hash\n", hex);
	284	}
	285
e78d9772	286	pull_say("got %s\n", hex);
6eb7ed54 DB	287	return 0;
	288	}
	289
cd541a68 DB	290	int fetch_ref(char ref, unsigned char sha1)
cd541a68 DB	291	{
fa3e0655 DB	292	char url, posn;
	293	char hex[42];
	294	struct buffer buffer;
	295	buffer.size = 41;
	296	buffer.posn = 0;
	297	buffer.buffer = hex;
	298	hex[41] = '\0';
	299
	300	curl_easy_setopt(curl, CURLOPT_FILE, &buffer);
	301	curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
	302
	303	url = xmalloc(strlen(base) + 6 + strlen(ref));
	304	strcpy(url, base);
	305	posn = url + strlen(base);
	306	strcpy(posn, "refs/");
	307	posn += 5;
	308	strcpy(posn, ref);
	309
	310	curl_easy_setopt(curl, CURLOPT_URL, url);
	311
	312	if (curl_easy_perform(curl))
	313	return error("Couldn't get %s for %s\n", url, ref);
	314
	315	hex[40] = '\0';
	316	get_sha1_hex(hex, sha1);
	317	return 0;
cd541a68 DB	318	}
cd541a68 DB	319
6eb7ed54 DB	320	int main(int argc, char **argv)
	321	{
	322	char *commit_id;
	323	char *url;
	324	int arg = 1;
6eb7ed54 DB	325
	326	while (arg < argc && argv[arg][0] == '-') {
	327	if (argv[arg][1] == 't') {
4250a5e5	328	get_tree = 1;
6eb7ed54	329	} else if (argv[arg][1] == 'c') {
4250a5e5	330	get_history = 1;
6eb7ed54	331	} else if (argv[arg][1] == 'a') {
4250a5e5 DB	332	get_all = 1;
	333	get_tree = 1;
	334	get_history = 1;
e78d9772 JH	335	} else if (argv[arg][1] == 'v') {
e78d9772 JH	336	get_verbosely = 1;
fa3e0655 DB	337	} else if (argv[arg][1] == 'w') {
	338	write_ref = argv[arg + 1];
	339	arg++;
6eb7ed54 DB	340	}
	341	arg++;
	342	}
	343	if (argc < arg + 2) {
fa3e0655	344	usage("git-http-pull [-c] [-t] [-a] [-d] [-v] [--recover] [-w ref] commit-id url");
6eb7ed54 DB	345	return 1;
	346	}
	347	commit_id = argv[arg];
	348	url = argv[arg + 1];
	349
6eb7ed54 DB	350	curl_global_init(CURL_GLOBAL_ALL);
	351
	352	curl = curl_easy_init();
	353
3dcb90f5 DT	354	curl_ssl_verify = gitenv("GIT_SSL_NO_VERIFY") ? 0 : 1;
3dcb90f5 DT	355	curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, curl_ssl_verify);
9f6cf65e	356	#if LIBCURL_VERSION_NUM >= 0x070907
3dcb90f5	357	curl_easy_setopt(curl, CURLOPT_NETRC, CURL_NETRC_OPTIONAL);
9f6cf65e	358	#endif
3dcb90f5	359
6eb7ed54 DB	360	base = url;
6eb7ed54 DB	361
4250a5e5	362	if (pull(commit_id))
6eb7ed54 DB	363	return 1;
	364
	365	curl_global_cleanup();
	366	return 0;
	367	}