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

#include "cache.h"
#include "commit.h"
#include "pack.h"
#include "fetch.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

#define PREV_BUF_SIZE 4096
#define RANGE_HEADER_SIZE 30

static CURL *curl;
static struct curl_slist *no_pragma_header;
static struct curl_slist *no_range_header;
static char curl_errorstr[CURL_ERROR_SIZE];

static char *initial_base;

struct alt_base
{
	char *base;
	int got_indices;
	struct packed_git *packs;
	struct alt_base *next;
};

static struct alt_base *alt = NULL;

static SHA_CTX c;
static z_stream stream;

static int local;
static int zret;

static int curl_ssl_verify;
static char *ssl_cert;
static char *ssl_key;
static char *ssl_capath;
static char *ssl_cainfo;

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;
}

void prefetch(unsigned char *sha1)
{
}

int relink_or_rename(char *old, char *new) {
	int ret;

	ret = link(old, new);
	if (ret < 0) {
		/* Same Coda hack as in write_sha1_file(sha1_file.c) */
		ret = errno;
		if (ret == EXDEV && !rename(old, new))
			return 0;
	}
	unlink(old);
	if (ret) {
		if (ret != EEXIST)
			return ret;
	}

	return 0;
}

static int got_alternates = 0;

static int fetch_index(struct alt_base *repo, unsigned char *sha1)
{
	char *filename;
	char *url;
	char tmpfile[PATH_MAX];
	int ret;
	long prev_posn = 0;
	char range[RANGE_HEADER_SIZE];
	struct curl_slist *range_header = NULL;
	CURLcode curl_result;

	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(repo->base) + 64);
	sprintf(url, "%s/objects/pack/pack-%s.idx",
		repo->base, sha1_to_hex(sha1));
	
	filename = sha1_pack_index_name(sha1);
	snprintf(tmpfile, sizeof(tmpfile), "%s.temp", filename);
	indexfile = fopen(tmpfile, "a");
	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);
	curl_easy_setopt(curl, CURLOPT_HTTPHEADER, no_pragma_header);
	curl_easy_setopt(curl, CURLOPT_ERRORBUFFER, curl_errorstr);
	
	/* If there is data present from a previous transfer attempt,
	   resume where it left off */
	prev_posn = ftell(indexfile);
	if (prev_posn>0) {
		if (get_verbosely)
			fprintf(stderr,
				"Resuming fetch of index for pack %s at byte %ld\n",
				sha1_to_hex(sha1), prev_posn);
		sprintf(range, "Range: bytes=%ld-", prev_posn);
		range_header = curl_slist_append(range_header, range);
		curl_easy_setopt(curl, CURLOPT_HTTPHEADER, range_header);
	}

	/* Clear out the Range: header after performing the request, so
	   other curl requests don't inherit inappropriate header data */
	curl_result = curl_easy_perform(curl);
	curl_easy_setopt(curl, CURLOPT_HTTPHEADER, no_range_header);
	if (curl_result != 0) {
		fclose(indexfile);
		return error("Unable to get pack index %s\n%s", url,
			     curl_errorstr);
	}

	fclose(indexfile);

	ret = relink_or_rename(tmpfile, filename);
	if (ret)
		return error("unable to write index filename %s: %s",
			     filename, strerror(ret));

	return 0;
}

static int setup_index(struct alt_base *repo, 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(repo, sha1))
		return -1;

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

static int fetch_alternates(char *base)
{
	int ret = 0;
	struct buffer buffer;
	char *url;
	char *data;
	int i = 0;
	int http_specific = 1;
	if (got_alternates)
		return 0;
	data = xmalloc(4096);
	buffer.size = 4095;
	buffer.posn = 0;
	buffer.buffer = data;

	if (get_verbosely)
		fprintf(stderr, "Getting alternates list\n");
	
	url = xmalloc(strlen(base) + 31);
	sprintf(url, "%s/objects/info/http-alternates", 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) || !buffer.posn) {
		http_specific = 0;

		sprintf(url, "%s/objects/info/alternates", 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 0;
		}
	}

	data[buffer.posn] = '\0';

	while (i < buffer.posn) {
		int posn = i;
		while (posn < buffer.posn && data[posn] != '\n')
			posn++;
		if (data[posn] == '\n') {
			int okay = 0;
			int serverlen = 0;
			struct alt_base *newalt;
			char *target = NULL;
			if (data[i] == '/') {
				serverlen = strchr(base + 8, '/') - base;
				okay = 1;
			} else if (!memcmp(data + i, "../", 3)) {
				i += 3;
				serverlen = strlen(base);
				while (i + 2 < posn && 
				       !memcmp(data + i, "../", 3)) {
					do {
						serverlen--;
					} while (serverlen &&
						 base[serverlen - 1] != '/');
					i += 3;
				}
				// If the server got removed, give up.
				okay = strchr(base, ':') - base + 3 < 
					serverlen;
			} else if (http_specific) {
				char *colon = strchr(data + i, ':');
				char *slash = strchr(data + i, '/');
				if (colon && slash && colon < data + posn &&
				    slash < data + posn && colon < slash) {
					okay = 1;
				}
			}
			// skip 'objects' at end
			if (okay) {
				target = xmalloc(serverlen + posn - i - 6);
				strncpy(target, base, serverlen);
				strncpy(target + serverlen, data + i,
					posn - i - 7);
				target[serverlen + posn - i - 7] = '\0';
				if (get_verbosely)
					fprintf(stderr, 
						"Also look at %s\n", target);
				newalt = xmalloc(sizeof(*newalt));
				newalt->next = alt;
				newalt->base = target;
				newalt->got_indices = 0;
				newalt->packs = NULL;
				alt = newalt;
				ret++;
			}
		}
		i = posn + 1;
	}
	got_alternates = 1;
	
	return ret;
}

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

	if (repo->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(repo->base) + 21);
	sprintf(url, "%s/objects/info/packs", repo->base);

	curl_easy_setopt(curl, CURLOPT_FILE, &buffer);
	curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
	curl_easy_setopt(curl, CURLOPT_URL, url);
	curl_easy_setopt(curl, CURLOPT_HTTPHEADER, NULL);
	curl_easy_setopt(curl, CURLOPT_ERRORBUFFER, curl_errorstr);
	
	if (curl_easy_perform(curl))
		return error("%s", curl_errorstr);

	while (i < buffer.posn) {
		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(repo, sha1);
				i += 51;
				break;
			}
		default:
			while (data[i] != '\n')
				i++;
		}
		i++;
	}

	repo->got_indices = 1;
	return 0;
}

static int fetch_pack(struct alt_base *repo, unsigned char *sha1)
{
	char *url;
	struct packed_git *target;
	struct packed_git **lst;
	FILE *packfile;
	char *filename;
	char tmpfile[PATH_MAX];
	int ret;
	long prev_posn = 0;
	char range[RANGE_HEADER_SIZE];
	struct curl_slist *range_header = NULL;
	CURLcode curl_result;

	if (fetch_indices(repo))
		return -1;
	target = find_sha1_pack(sha1, repo->packs);
	if (!target)
		return -1;

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

	filename = sha1_pack_name(target->sha1);
	snprintf(tmpfile, sizeof(tmpfile), "%s.temp", filename);
	packfile = fopen(tmpfile, "a");
	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);
	curl_easy_setopt(curl, CURLOPT_HTTPHEADER, no_pragma_header);
	curl_easy_setopt(curl, CURLOPT_ERRORBUFFER, curl_errorstr);

	/* If there is data present from a previous transfer attempt,
	   resume where it left off */
	prev_posn = ftell(packfile);
	if (prev_posn>0) {
		if (get_verbosely)
			fprintf(stderr,
				"Resuming fetch of pack %s at byte %ld\n",
				sha1_to_hex(target->sha1), prev_posn);
		sprintf(range, "Range: bytes=%ld-", prev_posn);
		range_header = curl_slist_append(range_header, range);
		curl_easy_setopt(curl, CURLOPT_HTTPHEADER, range_header);
	}

	/* Clear out the Range: header after performing the request, so
	   other curl requests don't inherit inappropriate header data */
	curl_result = curl_easy_perform(curl);
	curl_easy_setopt(curl, CURLOPT_HTTPHEADER, no_range_header);
	if (curl_result != 0) {
		fclose(packfile);
		return error("Unable to get pack file %s\n%s", url,
			     curl_errorstr);
	}

	fclose(packfile);

	ret = relink_or_rename(tmpfile, filename);
	if (ret)
		return error("unable to write pack filename %s: %s",
			     filename, strerror(ret));

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

	if (verify_pack(target, 0))
		return -1;
	install_packed_git(target);

	return 0;
}

static int fetch_object(struct alt_base *repo, unsigned char *sha1)
{
	char *hex = sha1_to_hex(sha1);
	char *filename = sha1_file_name(sha1);
	unsigned char real_sha1[20];
	char tmpfile[PATH_MAX];
	char prevfile[PATH_MAX];
	int ret;
	char *url;
	char *posn;
	int prevlocal;
	unsigned char prev_buf[PREV_BUF_SIZE];
	ssize_t prev_read = 0;
	long prev_posn = 0;
	char range[RANGE_HEADER_SIZE];
	struct curl_slist *range_header = NULL;
	CURLcode curl_result;

	snprintf(tmpfile, sizeof(tmpfile), "%s.temp", filename);
	snprintf(prevfile, sizeof(prevfile), "%s.prev", filename);

	if (unlink(prevfile) && (errno != ENOENT))
		return error("Failed to unlink %s (%s)",
			     prevfile, strerror(errno));
	if (rename(tmpfile, prevfile) && (errno != ENOENT))
		return error("Failed to rename %s to %s (%s)",
			     tmpfile, prevfile, strerror(errno));

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

	/* Note: if another instance starts now, it will turn our new
	   tmpfile into its prevfile. */

	if (local < 0)
		return error("Couldn't create temporary file %s for %s: %s\n",
			     tmpfile, filename, strerror(errno));

	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);
	curl_easy_setopt(curl, CURLOPT_HTTPHEADER, no_pragma_header);
	curl_easy_setopt(curl, CURLOPT_ERRORBUFFER, curl_errorstr);

	url = xmalloc(strlen(repo->base) + 50);
	strcpy(url, repo->base);
	posn = url + strlen(repo->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 a previous temp file is present, process what was already
	   fetched. */
	prevlocal = open(prevfile, O_RDONLY);
	if (prevlocal != -1) {
		do {
			prev_read = read(prevlocal, prev_buf, PREV_BUF_SIZE);
			if (prev_read>0) {
				if (fwrite_sha1_file(prev_buf,
						     1,
						     prev_read,
						     NULL) == prev_read) {
					prev_posn += prev_read;
				} else {
					prev_read = -1;
				}
			}
		} while (prev_read > 0);
		close(prevlocal);
	}
	unlink(prevfile);

	/* Reset inflate/SHA1 if there was an error reading the previous temp
	   file; also rewind to the beginning of the local file. */
	if (prev_read == -1) {
		memset(&stream, 0, sizeof(stream));
		inflateInit(&stream);
		SHA1_Init(&c);
		if (prev_posn>0) {
			prev_posn = 0;
			lseek(local, SEEK_SET, 0);
			ftruncate(local, 0);
		}
	}

	/* If we have successfully processed data from a previous fetch
	   attempt, only fetch the data we don't already have. */
	if (prev_posn>0) {
		if (get_verbosely)
			fprintf(stderr,
				"Resuming fetch of object %s at byte %ld\n",
				hex, prev_posn);
		sprintf(range, "Range: bytes=%ld-", prev_posn);
		range_header = curl_slist_append(range_header, range);
		curl_easy_setopt(curl, CURLOPT_HTTPHEADER, range_header);
	}

	/* Clear out the Range: header after performing the request, so
	   other curl requests don't inherit inappropriate header data */
	curl_result = curl_easy_perform(curl);
	curl_easy_setopt(curl, CURLOPT_HTTPHEADER, no_range_header);
	if (curl_result != 0) {
		return error("%s", curl_errorstr);
	}

	fchmod(local, 0444);
	close(local);
	inflateEnd(&stream);
	SHA1_Final(real_sha1, &c);
	if (zret != Z_STREAM_END) {
		unlink(tmpfile);
		return error("File %s (%s) corrupt\n", hex, url);
	}
	if (memcmp(sha1, real_sha1, 20)) {
		unlink(tmpfile);
		return error("File %s has bad hash\n", hex);
	}
	ret = relink_or_rename(tmpfile, filename);
	if (ret)
		return error("unable to write sha1 filename %s: %s",
			     filename, strerror(ret));

	pull_say("got %s\n", hex);
	return 0;
}

int fetch(unsigned char *sha1)
{
	struct alt_base *altbase = alt;
	while (altbase) {
		if (!fetch_object(altbase, sha1))
			return 0;
		if (!fetch_pack(altbase, sha1))
			return 0;
		if (fetch_alternates(altbase->base) > 0) {
			altbase = alt;
			continue;
		}
		altbase = altbase->next;
	}
	return error("Unable to find %s under %s\n", sha1_to_hex(sha1), 
		     initial_base);
}

int fetch_ref(char *ref, unsigned char *sha1)
{
        char *url, *posn;
        char hex[42];
        struct buffer buffer;
	char *base = initial_base;
        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);
	curl_easy_setopt(curl, CURLOPT_HTTPHEADER, NULL);
	curl_easy_setopt(curl, CURLOPT_ERRORBUFFER, curl_errorstr);

        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%s",
			     url, ref, curl_errorstr);

        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++;
		} else if (!strcmp(argv[arg], "--recover")) {
			get_recover = 1;
		}
		arg++;
	}
	if (argc < arg + 2) {
		usage("git-http-fetch [-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();
	no_pragma_header = curl_slist_append(no_pragma_header, "Pragma:");
	no_range_header = curl_slist_append(no_range_header, "Range:");

	curl_ssl_verify = getenv("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

	if ((ssl_cert = getenv("GIT_SSL_CERT")) != NULL) {
		curl_easy_setopt(curl, CURLOPT_SSLCERT, ssl_cert);
	}
#if LIBCURL_VERSION_NUM >= 0x070902
	if ((ssl_key = getenv("GIT_SSL_KEY")) != NULL) {
		curl_easy_setopt(curl, CURLOPT_SSLKEY, ssl_key);
	}
#endif
#if LIBCURL_VERSION_NUM >= 0x070908
	if ((ssl_capath = getenv("GIT_SSL_CAPATH")) != NULL) {
		curl_easy_setopt(curl, CURLOPT_CAPATH, ssl_capath);
	}
#endif
	if ((ssl_cainfo = getenv("GIT_SSL_CAINFO")) != NULL) {
		curl_easy_setopt(curl, CURLOPT_CAINFO, ssl_cainfo);
	}

	alt = xmalloc(sizeof(*alt));
	alt->base = url;
	alt->got_indices = 0;
	alt->packs = NULL;
	alt->next = NULL;
	initial_base = url;

	if (pull(commit_id))
		return 1;

	curl_slist_free_all(no_pragma_header);
	curl_global_cleanup();
	return 0;
}
Commit	Line	Data
6eb7ed54 DB	1	#include "cache.h"
6eb7ed54 DB	2	#include "commit.h"
271421cd	3	#include "pack.h"
215a7ad1	4	#include "fetch.h"
4250a5e5	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
49a0f240 NH	16	#define PREV_BUF_SIZE 4096
	17	#define RANGE_HEADER_SIZE 30
	18
6eb7ed54	19	static CURL *curl;
1db69b57	20	static struct curl_slist *no_pragma_header;
49a0f240	21	static struct curl_slist *no_range_header;
1ddea77e	22	static char curl_errorstr[CURL_ERROR_SIZE];
6eb7ed54	23
b3661567 DB	24	static char *initial_base;
	25
	26	struct alt_base
	27	{
	28	char *base;
	29	int got_indices;
	30	struct packed_git *packs;
	31	struct alt_base *next;
	32	};
	33
a7928f8e	34	static struct alt_base *alt = NULL;
6eb7ed54	35
6eb7ed54 DB	36	static SHA_CTX c;
	37	static z_stream stream;
	38
	39	static int local;
	40	static int zret;
	41
3dcb90f5	42	static int curl_ssl_verify;
5acb6de1 NH	43	static char *ssl_cert;
	44	static char *ssl_key;
	45	static char *ssl_capath;
	46	static char *ssl_cainfo;
3dcb90f5	47
fa3e0655 DB	48	struct buffer
	49	{
	50	size_t posn;
	51	size_t size;
	52	void *buffer;
	53	};
	54
	55	static size_t fwrite_buffer(void *ptr, size_t eltsize, size_t nmemb,
182005b9 DB	56	struct buffer *buffer)
182005b9 DB	57	{
fa3e0655 DB	58	size_t size = eltsize * nmemb;
	59	if (size > buffer->size - buffer->posn)
	60	size = buffer->size - buffer->posn;
	61	memcpy(buffer->buffer + buffer->posn, ptr, size);
	62	buffer->posn += size;
	63	return size;
	64	}
	65
182005b9 DB	66	static size_t fwrite_sha1_file(void *ptr, size_t eltsize, size_t nmemb,
	67	void *data)
	68	{
bf0f910d	69	unsigned char expn[4096];
6eb7ed54 DB	70	size_t size = eltsize * nmemb;
	71	int posn = 0;
	72	do {
	73	ssize_t retval = write(local, ptr + posn, size - posn);
	74	if (retval < 0)
	75	return posn;
	76	posn += retval;
	77	} while (posn < size);
	78
	79	stream.avail_in = size;
	80	stream.next_in = ptr;
	81	do {
	82	stream.next_out = expn;
	83	stream.avail_out = sizeof(expn);
	84	zret = inflate(&stream, Z_SYNC_FLUSH);
	85	SHA1_Update(&c, expn, sizeof(expn) - stream.avail_out);
	86	} while (stream.avail_in && zret == Z_OK);
	87	return size;
	88	}
	89
1e8be59d DB	90	void prefetch(unsigned char *sha1)
	91	{
	92	}
	93
49a0f240 NH	94	int relink_or_rename(char old, char new) {
	95	int ret;
	96
	97	ret = link(old, new);
	98	if (ret < 0) {
	99	/* Same Coda hack as in write_sha1_file(sha1_file.c) */
	100	ret = errno;
	101	if (ret == EXDEV && !rename(old, new))
	102	return 0;
	103	}
	104	unlink(old);
	105	if (ret) {
	106	if (ret != EEXIST)
	107	return ret;
	108	}
	109
	110	return 0;
	111	}
	112
b3661567	113	static int got_alternates = 0;
182005b9	114
b3661567	115	static int fetch_index(struct alt_base repo, unsigned char sha1)
182005b9 DB	116	{
	117	char *filename;
	118	char *url;
49a0f240 NH	119	char tmpfile[PATH_MAX];
	120	int ret;
	121	long prev_posn = 0;
	122	char range[RANGE_HEADER_SIZE];
	123	struct curl_slist *range_header = NULL;
	124	CURLcode curl_result;
182005b9 DB	125
	126	FILE *indexfile;
	127
	128	if (has_pack_index(sha1))
	129	return 0;
	130
	131	if (get_verbosely)
	132	fprintf(stderr, "Getting index for pack %s\n",
	133	sha1_to_hex(sha1));
	134
b3661567	135	url = xmalloc(strlen(repo->base) + 64);
182005b9	136	sprintf(url, "%s/objects/pack/pack-%s.idx",
b3661567	137	repo->base, sha1_to_hex(sha1));
182005b9 DB	138
182005b9 DB	139	filename = sha1_pack_index_name(sha1);
49a0f240 NH	140	snprintf(tmpfile, sizeof(tmpfile), "%s.temp", filename);
49a0f240 NH	141	indexfile = fopen(tmpfile, "a");
182005b9 DB	142	if (!indexfile)
	143	return error("Unable to open local file %s for pack index",
	144	filename);
	145
	146	curl_easy_setopt(curl, CURLOPT_FILE, indexfile);
	147	curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, fwrite);
	148	curl_easy_setopt(curl, CURLOPT_URL, url);
1db69b57	149	curl_easy_setopt(curl, CURLOPT_HTTPHEADER, no_pragma_header);
1ddea77e	150	curl_easy_setopt(curl, CURLOPT_ERRORBUFFER, curl_errorstr);
182005b9	151
49a0f240 NH	152	/* If there is data present from a previous transfer attempt,
	153	resume where it left off */
	154	prev_posn = ftell(indexfile);
	155	if (prev_posn>0) {
	156	if (get_verbosely)
	157	fprintf(stderr,
	158	"Resuming fetch of index for pack %s at byte %ld\n",
	159	sha1_to_hex(sha1), prev_posn);
	160	sprintf(range, "Range: bytes=%ld-", prev_posn);
	161	range_header = curl_slist_append(range_header, range);
	162	curl_easy_setopt(curl, CURLOPT_HTTPHEADER, range_header);
	163	}
	164
	165	/* Clear out the Range: header after performing the request, so
	166	other curl requests don't inherit inappropriate header data */
	167	curl_result = curl_easy_perform(curl);
	168	curl_easy_setopt(curl, CURLOPT_HTTPHEADER, no_range_header);
	169	if (curl_result != 0) {
182005b9	170	fclose(indexfile);
1ddea77e NH	171	return error("Unable to get pack index %s\n%s", url,
1ddea77e NH	172	curl_errorstr);
182005b9 DB	173	}
	174
	175	fclose(indexfile);
49a0f240 NH	176
	177	ret = relink_or_rename(tmpfile, filename);
	178	if (ret)
	179	return error("unable to write index filename %s: %s",
	180	filename, strerror(ret));
	181
182005b9 DB	182	return 0;
	183	}
	184
b3661567	185	static int setup_index(struct alt_base repo, unsigned char sha1)
182005b9 DB	186	{
	187	struct packed_git *new_pack;
	188	if (has_pack_file(sha1))
	189	return 0; // don't list this as something we can get
	190
b3661567	191	if (fetch_index(repo, sha1))
182005b9 DB	192	return -1;
	193
	194	new_pack = parse_pack_index(sha1);
b3661567 DB	195	new_pack->next = repo->packs;
b3661567 DB	196	repo->packs = new_pack;
182005b9 DB	197	return 0;
	198	}
	199
b3661567 DB	200	static int fetch_alternates(char *base)
	201	{
	202	int ret = 0;
	203	struct buffer buffer;
	204	char *url;
	205	char *data;
	206	int i = 0;
1b0c1e67	207	int http_specific = 1;
b3661567 DB	208	if (got_alternates)
	209	return 0;
	210	data = xmalloc(4096);
1b0c1e67	211	buffer.size = 4095;
b3661567 DB	212	buffer.posn = 0;
	213	buffer.buffer = data;
	214
	215	if (get_verbosely)
	216	fprintf(stderr, "Getting alternates list\n");
	217
	218	url = xmalloc(strlen(base) + 31);
	219	sprintf(url, "%s/objects/info/http-alternates", base);
	220
	221	curl_easy_setopt(curl, CURLOPT_FILE, &buffer);
	222	curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
	223	curl_easy_setopt(curl, CURLOPT_URL, url);
	224
	225	if (curl_easy_perform(curl) \|\| !buffer.posn) {
1b0c1e67 DB	226	http_specific = 0;
1b0c1e67 DB	227
b3661567 DB	228	sprintf(url, "%s/objects/info/alternates", base);
	229
	230	curl_easy_setopt(curl, CURLOPT_FILE, &buffer);
	231	curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
	232	curl_easy_setopt(curl, CURLOPT_URL, url);
	233
	234	if (curl_easy_perform(curl)) {
	235	return 0;
	236	}
	237	}
	238
1b0c1e67 DB	239	data[buffer.posn] = '\0';
1b0c1e67 DB	240
b3661567 DB	241	while (i < buffer.posn) {
	242	int posn = i;
	243	while (posn < buffer.posn && data[posn] != '\n')
	244	posn++;
	245	if (data[posn] == '\n') {
1b0c1e67 DB	246	int okay = 0;
	247	int serverlen = 0;
	248	struct alt_base *newalt;
	249	char *target = NULL;
b3661567	250	if (data[i] == '/') {
1b0c1e67 DB	251	serverlen = strchr(base + 8, '/') - base;
	252	okay = 1;
	253	} else if (!memcmp(data + i, "../", 3)) {
	254	i += 3;
	255	serverlen = strlen(base);
	256	while (i + 2 < posn &&
	257	!memcmp(data + i, "../", 3)) {
	258	do {
	259	serverlen--;
	260	} while (serverlen &&
	261	base[serverlen - 1] != '/');
	262	i += 3;
	263	}
	264	// If the server got removed, give up.
	265	okay = strchr(base, ':') - base + 3 <
	266	serverlen;
	267	} else if (http_specific) {
	268	char *colon = strchr(data + i, ':');
	269	char *slash = strchr(data + i, '/');
	270	if (colon && slash && colon < data + posn &&
	271	slash < data + posn && colon < slash) {
	272	okay = 1;
	273	}
	274	}
	275	// skip 'objects' at end
	276	if (okay) {
	277	target = xmalloc(serverlen + posn - i - 6);
b3661567 DB	278	strncpy(target, base, serverlen);
	279	strncpy(target + serverlen, data + i,
	280	posn - i - 7);
	281	target[serverlen + posn - i - 7] = '\0';
	282	if (get_verbosely)
	283	fprintf(stderr,
	284	"Also look at %s\n", target);
	285	newalt = xmalloc(sizeof(*newalt));
	286	newalt->next = alt;
	287	newalt->base = target;
	288	newalt->got_indices = 0;
	289	newalt->packs = NULL;
	290	alt = newalt;
	291	ret++;
	292	}
	293	}
	294	i = posn + 1;
	295	}
	296	got_alternates = 1;
	297
	298	return ret;
	299	}
	300
	301	static int fetch_indices(struct alt_base *repo)
182005b9 DB	302	{
	303	unsigned char sha1[20];
	304	char *url;
	305	struct buffer buffer;
	306	char *data;
	307	int i = 0;
	308
b3661567	309	if (repo->got_indices)
182005b9 DB	310	return 0;
	311
	312	data = xmalloc(4096);
	313	buffer.size = 4096;
	314	buffer.posn = 0;
	315	buffer.buffer = data;
	316
	317	if (get_verbosely)
	318	fprintf(stderr, "Getting pack list\n");
	319
b3661567 DB	320	url = xmalloc(strlen(repo->base) + 21);
b3661567 DB	321	sprintf(url, "%s/objects/info/packs", repo->base);
182005b9 DB	322
	323	curl_easy_setopt(curl, CURLOPT_FILE, &buffer);
	324	curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
	325	curl_easy_setopt(curl, CURLOPT_URL, url);
1db69b57	326	curl_easy_setopt(curl, CURLOPT_HTTPHEADER, NULL);
1ddea77e	327	curl_easy_setopt(curl, CURLOPT_ERRORBUFFER, curl_errorstr);
182005b9	328
1ddea77e NH	329	if (curl_easy_perform(curl))
1ddea77e NH	330	return error("%s", curl_errorstr);
182005b9	331
b3661567	332	while (i < buffer.posn) {
182005b9 DB	333	switch (data[i]) {
	334	case 'P':
	335	i++;
	336	if (i + 52 < buffer.posn &&
	337	!strncmp(data + i, " pack-", 6) &&
	338	!strncmp(data + i + 46, ".pack\n", 6)) {
	339	get_sha1_hex(data + i + 6, sha1);
b3661567	340	setup_index(repo, sha1);
182005b9 DB	341	i += 51;
	342	break;
	343	}
	344	default:
	345	while (data[i] != '\n')
	346	i++;
	347	}
	348	i++;
b3661567	349	}
182005b9	350
b3661567	351	repo->got_indices = 1;
182005b9 DB	352	return 0;
	353	}
	354
b3661567	355	static int fetch_pack(struct alt_base repo, unsigned char sha1)
182005b9 DB	356	{
	357	char *url;
	358	struct packed_git *target;
	359	struct packed_git **lst;
	360	FILE *packfile;
	361	char *filename;
49a0f240 NH	362	char tmpfile[PATH_MAX];
	363	int ret;
	364	long prev_posn = 0;
	365	char range[RANGE_HEADER_SIZE];
	366	struct curl_slist *range_header = NULL;
	367	CURLcode curl_result;
182005b9	368
b3661567	369	if (fetch_indices(repo))
182005b9	370	return -1;
b3661567	371	target = find_sha1_pack(sha1, repo->packs);
182005b9	372	if (!target)
b3661567	373	return -1;
182005b9 DB	374
	375	if (get_verbosely) {
	376	fprintf(stderr, "Getting pack %s\n",
	377	sha1_to_hex(target->sha1));
	378	fprintf(stderr, " which contains %s\n",
	379	sha1_to_hex(sha1));
	380	}
	381
b3661567	382	url = xmalloc(strlen(repo->base) + 65);
182005b9	383	sprintf(url, "%s/objects/pack/pack-%s.pack",
b3661567	384	repo->base, sha1_to_hex(target->sha1));
182005b9 DB	385
182005b9 DB	386	filename = sha1_pack_name(target->sha1);
49a0f240 NH	387	snprintf(tmpfile, sizeof(tmpfile), "%s.temp", filename);
49a0f240 NH	388	packfile = fopen(tmpfile, "a");
182005b9 DB	389	if (!packfile)
	390	return error("Unable to open local file %s for pack",
	391	filename);
	392
	393	curl_easy_setopt(curl, CURLOPT_FILE, packfile);
	394	curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, fwrite);
	395	curl_easy_setopt(curl, CURLOPT_URL, url);
1db69b57	396	curl_easy_setopt(curl, CURLOPT_HTTPHEADER, no_pragma_header);
1ddea77e NH	397	curl_easy_setopt(curl, CURLOPT_ERRORBUFFER, curl_errorstr);
1ddea77e NH	398
49a0f240 NH	399	/* If there is data present from a previous transfer attempt,
	400	resume where it left off */
	401	prev_posn = ftell(packfile);
	402	if (prev_posn>0) {
	403	if (get_verbosely)
	404	fprintf(stderr,
	405	"Resuming fetch of pack %s at byte %ld\n",
	406	sha1_to_hex(target->sha1), prev_posn);
	407	sprintf(range, "Range: bytes=%ld-", prev_posn);
	408	range_header = curl_slist_append(range_header, range);
	409	curl_easy_setopt(curl, CURLOPT_HTTPHEADER, range_header);
	410	}
	411
	412	/* Clear out the Range: header after performing the request, so
	413	other curl requests don't inherit inappropriate header data */
	414	curl_result = curl_easy_perform(curl);
	415	curl_easy_setopt(curl, CURLOPT_HTTPHEADER, no_range_header);
	416	if (curl_result != 0) {
182005b9	417	fclose(packfile);
1ddea77e NH	418	return error("Unable to get pack file %s\n%s", url,
1ddea77e NH	419	curl_errorstr);
182005b9 DB	420	}
	421
	422	fclose(packfile);
	423
49a0f240 NH	424	ret = relink_or_rename(tmpfile, filename);
	425	if (ret)
	426	return error("unable to write pack filename %s: %s",
	427	filename, strerror(ret));
	428
b3661567	429	lst = &repo->packs;
182005b9 DB	430	while (*lst != target)
	431	lst = &((*lst)->next);
	432	lst = (lst)->next;
	433
271421cd JH	434	if (verify_pack(target, 0))
271421cd JH	435	return -1;
182005b9 DB	436	install_packed_git(target);
	437
	438	return 0;
	439	}
	440
a7928f8e	441	static int fetch_object(struct alt_base repo, unsigned char sha1)
6eb7ed54 DB	442	{
	443	char *hex = sha1_to_hex(sha1);
	444	char *filename = sha1_file_name(sha1);
bf0f910d	445	unsigned char real_sha1[20];
09d92083	446	char tmpfile[PATH_MAX];
49a0f240	447	char prevfile[PATH_MAX];
09d92083	448	int ret;
6eb7ed54 DB	449	char *url;
6eb7ed54 DB	450	char *posn;
49a0f240 NH	451	int prevlocal;
	452	unsigned char prev_buf[PREV_BUF_SIZE];
	453	ssize_t prev_read = 0;
	454	long prev_posn = 0;
	455	char range[RANGE_HEADER_SIZE];
	456	struct curl_slist *range_header = NULL;
	457	CURLcode curl_result;
	458
	459	snprintf(tmpfile, sizeof(tmpfile), "%s.temp", filename);
	460	snprintf(prevfile, sizeof(prevfile), "%s.prev", filename);
271421cd JH	461
	462	if (unlink(prevfile) && (errno != ENOENT))
	463	return error("Failed to unlink %s (%s)",
	464	prevfile, strerror(errno));
	465	if (rename(tmpfile, prevfile) && (errno != ENOENT))
	466	return error("Failed to rename %s to %s (%s)",
	467	tmpfile, prevfile, strerror(errno));
49a0f240 NH	468
49a0f240 NH	469	local = open(tmpfile, O_WRONLY \| O_CREAT \| O_EXCL, 0666);
6eb7ed54	470
49a0f240 NH	471	/* Note: if another instance starts now, it will turn our new
49a0f240 NH	472	tmpfile into its prevfile. */
6eb7ed54 DB	473
6eb7ed54 DB	474	if (local < 0)
09d92083 JH	475	return error("Couldn't create temporary file %s for %s: %s\n",
09d92083 JH	476	tmpfile, filename, strerror(errno));
6eb7ed54 DB	477
	478	memset(&stream, 0, sizeof(stream));
	479
	480	inflateInit(&stream);
	481
	482	SHA1_Init(&c);
	483
182005b9	484	curl_easy_setopt(curl, CURLOPT_FAILONERROR, 1);
6eb7ed54 DB	485	curl_easy_setopt(curl, CURLOPT_FILE, NULL);
6eb7ed54 DB	486	curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, fwrite_sha1_file);
1db69b57	487	curl_easy_setopt(curl, CURLOPT_HTTPHEADER, no_pragma_header);
1ddea77e	488	curl_easy_setopt(curl, CURLOPT_ERRORBUFFER, curl_errorstr);
6eb7ed54	489
b3661567 DB	490	url = xmalloc(strlen(repo->base) + 50);
	491	strcpy(url, repo->base);
	492	posn = url + strlen(repo->base);
6eb7ed54 DB	493	strcpy(posn, "objects/");
	494	posn += 8;
	495	memcpy(posn, hex, 2);
	496	posn += 2;
	497	*(posn++) = '/';
	498	strcpy(posn, hex + 2);
	499
	500	curl_easy_setopt(curl, CURLOPT_URL, url);
	501
49a0f240 NH	502	/* If a previous temp file is present, process what was already
	503	fetched. */
	504	prevlocal = open(prevfile, O_RDONLY);
	505	if (prevlocal != -1) {
	506	do {
	507	prev_read = read(prevlocal, prev_buf, PREV_BUF_SIZE);
	508	if (prev_read>0) {
	509	if (fwrite_sha1_file(prev_buf,
	510	1,
	511	prev_read,
	512	NULL) == prev_read) {
	513	prev_posn += prev_read;
	514	} else {
	515	prev_read = -1;
	516	}
	517	}
	518	} while (prev_read > 0);
	519	close(prevlocal);
	520	}
	521	unlink(prevfile);
	522
	523	/* Reset inflate/SHA1 if there was an error reading the previous temp
	524	file; also rewind to the beginning of the local file. */
	525	if (prev_read == -1) {
	526	memset(&stream, 0, sizeof(stream));
	527	inflateInit(&stream);
	528	SHA1_Init(&c);
	529	if (prev_posn>0) {
	530	prev_posn = 0;
	531	lseek(local, SEEK_SET, 0);
271421cd	532	ftruncate(local, 0);
49a0f240 NH	533	}
	534	}
	535
	536	/* If we have successfully processed data from a previous fetch
	537	attempt, only fetch the data we don't already have. */
	538	if (prev_posn>0) {
	539	if (get_verbosely)
	540	fprintf(stderr,
	541	"Resuming fetch of object %s at byte %ld\n",
	542	hex, prev_posn);
	543	sprintf(range, "Range: bytes=%ld-", prev_posn);
	544	range_header = curl_slist_append(range_header, range);
	545	curl_easy_setopt(curl, CURLOPT_HTTPHEADER, range_header);
	546	}
	547
	548	/* Clear out the Range: header after performing the request, so
	549	other curl requests don't inherit inappropriate header data */
	550	curl_result = curl_easy_perform(curl);
	551	curl_easy_setopt(curl, CURLOPT_HTTPHEADER, no_range_header);
	552	if (curl_result != 0) {
1ddea77e	553	return error("%s", curl_errorstr);
182005b9	554	}
6eb7ed54	555
09d92083	556	fchmod(local, 0444);
6eb7ed54 DB	557	close(local);
	558	inflateEnd(&stream);
	559	SHA1_Final(real_sha1, &c);
	560	if (zret != Z_STREAM_END) {
09d92083	561	unlink(tmpfile);
6eb7ed54 DB	562	return error("File %s (%s) corrupt\n", hex, url);
	563	}
	564	if (memcmp(sha1, real_sha1, 20)) {
09d92083	565	unlink(tmpfile);
6eb7ed54 DB	566	return error("File %s has bad hash\n", hex);
6eb7ed54 DB	567	}
49a0f240 NH	568	ret = relink_or_rename(tmpfile, filename);
	569	if (ret)
	570	return error("unable to write sha1 filename %s: %s",
	571	filename, strerror(ret));
	572
e78d9772	573	pull_say("got %s\n", hex);
6eb7ed54 DB	574	return 0;
	575	}
	576
b3661567 DB	577	int fetch(unsigned char *sha1)
	578	{
	579	struct alt_base *altbase = alt;
	580	while (altbase) {
	581	if (!fetch_object(altbase, sha1))
	582	return 0;
	583	if (!fetch_pack(altbase, sha1))
	584	return 0;
	585	if (fetch_alternates(altbase->base) > 0) {
	586	altbase = alt;
	587	continue;
	588	}
	589	altbase = altbase->next;
	590	}
	591	return error("Unable to find %s under %s\n", sha1_to_hex(sha1),
	592	initial_base);
	593	}
	594
cd541a68 DB	595	int fetch_ref(char ref, unsigned char sha1)
cd541a68 DB	596	{
fa3e0655 DB	597	char url, posn;
	598	char hex[42];
	599	struct buffer buffer;
b3661567	600	char *base = initial_base;
fa3e0655 DB	601	buffer.size = 41;
	602	buffer.posn = 0;
	603	buffer.buffer = hex;
	604	hex[41] = '\0';
	605
	606	curl_easy_setopt(curl, CURLOPT_FILE, &buffer);
	607	curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1db69b57	608	curl_easy_setopt(curl, CURLOPT_HTTPHEADER, NULL);
1ddea77e	609	curl_easy_setopt(curl, CURLOPT_ERRORBUFFER, curl_errorstr);
fa3e0655 DB	610
	611	url = xmalloc(strlen(base) + 6 + strlen(ref));
	612	strcpy(url, base);
	613	posn = url + strlen(base);
	614	strcpy(posn, "refs/");
	615	posn += 5;
	616	strcpy(posn, ref);
	617
	618	curl_easy_setopt(curl, CURLOPT_URL, url);
	619
	620	if (curl_easy_perform(curl))
1ddea77e NH	621	return error("Couldn't get %s for %s\n%s",
1ddea77e NH	622	url, ref, curl_errorstr);
fa3e0655 DB	623
	624	hex[40] = '\0';
	625	get_sha1_hex(hex, sha1);
	626	return 0;
cd541a68 DB	627	}
cd541a68 DB	628
6eb7ed54 DB	629	int main(int argc, char **argv)
	630	{
	631	char *commit_id;
	632	char *url;
	633	int arg = 1;
6eb7ed54 DB	634
	635	while (arg < argc && argv[arg][0] == '-') {
	636	if (argv[arg][1] == 't') {
4250a5e5	637	get_tree = 1;
6eb7ed54	638	} else if (argv[arg][1] == 'c') {
4250a5e5	639	get_history = 1;
6eb7ed54	640	} else if (argv[arg][1] == 'a') {
4250a5e5 DB	641	get_all = 1;
	642	get_tree = 1;
	643	get_history = 1;
e78d9772 JH	644	} else if (argv[arg][1] == 'v') {
e78d9772 JH	645	get_verbosely = 1;
fa3e0655 DB	646	} else if (argv[arg][1] == 'w') {
	647	write_ref = argv[arg + 1];
	648	arg++;
820eca68 DB	649	} else if (!strcmp(argv[arg], "--recover")) {
820eca68 DB	650	get_recover = 1;
6eb7ed54 DB	651	}
	652	arg++;
	653	}
	654	if (argc < arg + 2) {
215a7ad1	655	usage("git-http-fetch [-c] [-t] [-a] [-d] [-v] [--recover] [-w ref] commit-id url");
6eb7ed54 DB	656	return 1;
	657	}
	658	commit_id = argv[arg];
	659	url = argv[arg + 1];
	660
6eb7ed54 DB	661	curl_global_init(CURL_GLOBAL_ALL);
	662
	663	curl = curl_easy_init();
1db69b57	664	no_pragma_header = curl_slist_append(no_pragma_header, "Pragma:");
49a0f240	665	no_range_header = curl_slist_append(no_range_header, "Range:");
6eb7ed54	666
a9ab586a	667	curl_ssl_verify = getenv("GIT_SSL_NO_VERIFY") ? 0 : 1;
3dcb90f5	668	curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, curl_ssl_verify);
9f6cf65e	669	#if LIBCURL_VERSION_NUM >= 0x070907
3dcb90f5	670	curl_easy_setopt(curl, CURLOPT_NETRC, CURL_NETRC_OPTIONAL);
9f6cf65e	671	#endif
3dcb90f5	672
5acb6de1 NH	673	if ((ssl_cert = getenv("GIT_SSL_CERT")) != NULL) {
	674	curl_easy_setopt(curl, CURLOPT_SSLCERT, ssl_cert);
	675	}
7d167feb	676	#if LIBCURL_VERSION_NUM >= 0x070902
5acb6de1 NH	677	if ((ssl_key = getenv("GIT_SSL_KEY")) != NULL) {
	678	curl_easy_setopt(curl, CURLOPT_SSLKEY, ssl_key);
	679	}
7d167feb	680	#endif
5acb6de1 NH	681	#if LIBCURL_VERSION_NUM >= 0x070908
	682	if ((ssl_capath = getenv("GIT_SSL_CAPATH")) != NULL) {
	683	curl_easy_setopt(curl, CURLOPT_CAPATH, ssl_capath);
	684	}
	685	#endif
	686	if ((ssl_cainfo = getenv("GIT_SSL_CAINFO")) != NULL) {
	687	curl_easy_setopt(curl, CURLOPT_CAINFO, ssl_cainfo);
	688	}
	689
b3661567 DB	690	alt = xmalloc(sizeof(*alt));
	691	alt->base = url;
	692	alt->got_indices = 0;
	693	alt->packs = NULL;
	694	alt->next = NULL;
	695	initial_base = url;
6eb7ed54	696
4250a5e5	697	if (pull(commit_id))
6eb7ed54 DB	698	return 1;
6eb7ed54 DB	699
1db69b57	700	curl_slist_free_all(no_pragma_header);
6eb7ed54 DB	701	curl_global_cleanup();
	702	return 0;
	703	}