git/remote-curl.c
Junio C Hamano 2233ad4534 Merge branch 'jc/push-cas'
Allow a safer "rewind of the remote tip" push than blind "--force",
by requiring that the overwritten remote ref to be unchanged since
the new history to replace it was prepared.

The machinery is more or less ready.  The "--force" option is again
the big red button to override any safety, thanks to J6t's sanity
(the original round allowed --lockref to defeat --force).

The logic to choose the default implemented here is fragile
(e.g. "git fetch" after seeing a failure will update the
remote-tracking branch and will make the next "push" pass,
defeating the safety pretty easily).  It is suitable only for the
simplest workflows, and it may hurt users more than it helps them.

* jc/push-cas:
  push: teach --force-with-lease to smart-http transport
  send-pack: fix parsing of --force-with-lease option
  t5540/5541: smart-http does not support "--force-with-lease"
  t5533: test "push --force-with-lease"
  push --force-with-lease: tie it all together
  push --force-with-lease: implement logic to populate old_sha1_expect[]
  remote.c: add command line option parser for "--force-with-lease"
  builtin/push.c: use OPT_BOOL, not OPT_BOOLEAN
  cache.h: move remote/connect API out of it
2013-09-09 14:30:29 -07:00

980 lines
23 KiB
C

#include "cache.h"
#include "remote.h"
#include "strbuf.h"
#include "walker.h"
#include "http.h"
#include "exec_cmd.h"
#include "run-command.h"
#include "pkt-line.h"
#include "string-list.h"
#include "sideband.h"
#include "argv-array.h"
static struct remote *remote;
static const char *url; /* always ends with a trailing slash */
struct options {
int verbosity;
unsigned long depth;
unsigned progress : 1,
check_self_contained_and_connected : 1,
followtags : 1,
dry_run : 1,
thin : 1;
};
static struct options options;
static struct string_list cas_options = STRING_LIST_INIT_DUP;
static int set_option(const char *name, const char *value)
{
if (!strcmp(name, "verbosity")) {
char *end;
int v = strtol(value, &end, 10);
if (value == end || *end)
return -1;
options.verbosity = v;
return 0;
}
else if (!strcmp(name, "progress")) {
if (!strcmp(value, "true"))
options.progress = 1;
else if (!strcmp(value, "false"))
options.progress = 0;
else
return -1;
return 0;
}
else if (!strcmp(name, "depth")) {
char *end;
unsigned long v = strtoul(value, &end, 10);
if (value == end || *end)
return -1;
options.depth = v;
return 0;
}
else if (!strcmp(name, "followtags")) {
if (!strcmp(value, "true"))
options.followtags = 1;
else if (!strcmp(value, "false"))
options.followtags = 0;
else
return -1;
return 0;
}
else if (!strcmp(name, "dry-run")) {
if (!strcmp(value, "true"))
options.dry_run = 1;
else if (!strcmp(value, "false"))
options.dry_run = 0;
else
return -1;
return 0;
}
else if (!strcmp(name, "check-connectivity")) {
if (!strcmp(value, "true"))
options.check_self_contained_and_connected = 1;
else if (!strcmp(value, "false"))
options.check_self_contained_and_connected = 0;
else
return -1;
return 0;
}
else if (!strcmp(name, "cas")) {
struct strbuf val = STRBUF_INIT;
strbuf_addf(&val, "--" CAS_OPT_NAME "=%s", value);
string_list_append(&cas_options, val.buf);
strbuf_release(&val);
return 0;
}
else {
return 1 /* unsupported */;
}
}
struct discovery {
const char *service;
char *buf_alloc;
char *buf;
size_t len;
struct ref *refs;
unsigned proto_git : 1;
};
static struct discovery *last_discovery;
static struct ref *parse_git_refs(struct discovery *heads, int for_push)
{
struct ref *list = NULL;
get_remote_heads(-1, heads->buf, heads->len, &list,
for_push ? REF_NORMAL : 0, NULL);
return list;
}
static struct ref *parse_info_refs(struct discovery *heads)
{
char *data, *start, *mid;
char *ref_name;
int i = 0;
struct ref *refs = NULL;
struct ref *ref = NULL;
struct ref *last_ref = NULL;
data = heads->buf;
start = NULL;
mid = data;
while (i < heads->len) {
if (!start) {
start = &data[i];
}
if (data[i] == '\t')
mid = &data[i];
if (data[i] == '\n') {
if (mid - start != 40)
die("%sinfo/refs not valid: is this a git repository?", url);
data[i] = 0;
ref_name = mid + 1;
ref = xmalloc(sizeof(struct ref) +
strlen(ref_name) + 1);
memset(ref, 0, sizeof(struct ref));
strcpy(ref->name, ref_name);
get_sha1_hex(start, ref->old_sha1);
if (!refs)
refs = ref;
if (last_ref)
last_ref->next = ref;
last_ref = ref;
start = NULL;
}
i++;
}
ref = alloc_ref("HEAD");
if (!http_fetch_ref(url, ref) &&
!resolve_remote_symref(ref, refs)) {
ref->next = refs;
refs = ref;
} else {
free(ref);
}
return refs;
}
static void free_discovery(struct discovery *d)
{
if (d) {
if (d == last_discovery)
last_discovery = NULL;
free(d->buf_alloc);
free_refs(d->refs);
free(d);
}
}
static int show_http_message(struct strbuf *type, struct strbuf *msg)
{
const char *p, *eol;
/*
* We only show text/plain parts, as other types are likely
* to be ugly to look at on the user's terminal.
*
* TODO should handle "; charset=XXX", and re-encode into
* logoutputencoding
*/
if (strcasecmp(type->buf, "text/plain"))
return -1;
strbuf_trim(msg);
if (!msg->len)
return -1;
p = msg->buf;
do {
eol = strchrnul(p, '\n');
fprintf(stderr, "remote: %.*s\n", (int)(eol - p), p);
p = eol + 1;
} while(*eol);
return 0;
}
static struct discovery* discover_refs(const char *service, int for_push)
{
struct strbuf exp = STRBUF_INIT;
struct strbuf type = STRBUF_INIT;
struct strbuf buffer = STRBUF_INIT;
struct discovery *last = last_discovery;
char *refs_url;
int http_ret, maybe_smart = 0;
if (last && !strcmp(service, last->service))
return last;
free_discovery(last);
strbuf_addf(&buffer, "%sinfo/refs", url);
if ((!prefixcmp(url, "http://") || !prefixcmp(url, "https://")) &&
git_env_bool("GIT_SMART_HTTP", 1)) {
maybe_smart = 1;
if (!strchr(url, '?'))
strbuf_addch(&buffer, '?');
else
strbuf_addch(&buffer, '&');
strbuf_addf(&buffer, "service=%s", service);
}
refs_url = strbuf_detach(&buffer, NULL);
http_ret = http_get_strbuf(refs_url, &type, &buffer,
HTTP_NO_CACHE | HTTP_KEEP_ERROR);
switch (http_ret) {
case HTTP_OK:
break;
case HTTP_MISSING_TARGET:
show_http_message(&type, &buffer);
die("repository '%s' not found", url);
case HTTP_NOAUTH:
show_http_message(&type, &buffer);
die("Authentication failed for '%s'", url);
default:
show_http_message(&type, &buffer);
die("unable to access '%s': %s", url, curl_errorstr);
}
last= xcalloc(1, sizeof(*last_discovery));
last->service = service;
last->buf_alloc = strbuf_detach(&buffer, &last->len);
last->buf = last->buf_alloc;
strbuf_addf(&exp, "application/x-%s-advertisement", service);
if (maybe_smart &&
(5 <= last->len && last->buf[4] == '#') &&
!strbuf_cmp(&exp, &type)) {
char *line;
/*
* smart HTTP response; validate that the service
* pkt-line matches our request.
*/
line = packet_read_line_buf(&last->buf, &last->len, NULL);
strbuf_reset(&exp);
strbuf_addf(&exp, "# service=%s", service);
if (strcmp(line, exp.buf))
die("invalid server response; got '%s'", line);
strbuf_release(&exp);
/* The header can include additional metadata lines, up
* until a packet flush marker. Ignore these now, but
* in the future we might start to scan them.
*/
while (packet_read_line_buf(&last->buf, &last->len, NULL))
;
last->proto_git = 1;
}
if (last->proto_git)
last->refs = parse_git_refs(last, for_push);
else
last->refs = parse_info_refs(last);
free(refs_url);
strbuf_release(&exp);
strbuf_release(&type);
strbuf_release(&buffer);
last_discovery = last;
return last;
}
static struct ref *get_refs(int for_push)
{
struct discovery *heads;
if (for_push)
heads = discover_refs("git-receive-pack", for_push);
else
heads = discover_refs("git-upload-pack", for_push);
return heads->refs;
}
static void output_refs(struct ref *refs)
{
struct ref *posn;
for (posn = refs; posn; posn = posn->next) {
if (posn->symref)
printf("@%s %s\n", posn->symref, posn->name);
else
printf("%s %s\n", sha1_to_hex(posn->old_sha1), posn->name);
}
printf("\n");
fflush(stdout);
}
struct rpc_state {
const char *service_name;
const char **argv;
struct strbuf *stdin_preamble;
char *service_url;
char *hdr_content_type;
char *hdr_accept;
char *buf;
size_t alloc;
size_t len;
size_t pos;
int in;
int out;
struct strbuf result;
unsigned gzip_request : 1;
unsigned initial_buffer : 1;
};
static size_t rpc_out(void *ptr, size_t eltsize,
size_t nmemb, void *buffer_)
{
size_t max = eltsize * nmemb;
struct rpc_state *rpc = buffer_;
size_t avail = rpc->len - rpc->pos;
if (!avail) {
rpc->initial_buffer = 0;
avail = packet_read(rpc->out, NULL, NULL, rpc->buf, rpc->alloc, 0);
if (!avail)
return 0;
rpc->pos = 0;
rpc->len = avail;
}
if (max < avail)
avail = max;
memcpy(ptr, rpc->buf + rpc->pos, avail);
rpc->pos += avail;
return avail;
}
#ifndef NO_CURL_IOCTL
static curlioerr rpc_ioctl(CURL *handle, int cmd, void *clientp)
{
struct rpc_state *rpc = clientp;
switch (cmd) {
case CURLIOCMD_NOP:
return CURLIOE_OK;
case CURLIOCMD_RESTARTREAD:
if (rpc->initial_buffer) {
rpc->pos = 0;
return CURLIOE_OK;
}
fprintf(stderr, "Unable to rewind rpc post data - try increasing http.postBuffer\n");
return CURLIOE_FAILRESTART;
default:
return CURLIOE_UNKNOWNCMD;
}
}
#endif
static size_t rpc_in(char *ptr, size_t eltsize,
size_t nmemb, void *buffer_)
{
size_t size = eltsize * nmemb;
struct rpc_state *rpc = buffer_;
write_or_die(rpc->in, ptr, size);
return size;
}
static int run_slot(struct active_request_slot *slot)
{
int err;
struct slot_results results;
slot->results = &results;
slot->curl_result = curl_easy_perform(slot->curl);
finish_active_slot(slot);
err = handle_curl_result(&results);
if (err != HTTP_OK && err != HTTP_REAUTH) {
error("RPC failed; result=%d, HTTP code = %ld",
results.curl_result, results.http_code);
}
return err;
}
static int probe_rpc(struct rpc_state *rpc)
{
struct active_request_slot *slot;
struct curl_slist *headers = NULL;
struct strbuf buf = STRBUF_INIT;
int err;
slot = get_active_slot();
headers = curl_slist_append(headers, rpc->hdr_content_type);
headers = curl_slist_append(headers, rpc->hdr_accept);
curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
curl_easy_setopt(slot->curl, CURLOPT_POST, 1);
curl_easy_setopt(slot->curl, CURLOPT_URL, rpc->service_url);
curl_easy_setopt(slot->curl, CURLOPT_ENCODING, NULL);
curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, "0000");
curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE, 4);
curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
curl_easy_setopt(slot->curl, CURLOPT_FILE, &buf);
err = run_slot(slot);
curl_slist_free_all(headers);
strbuf_release(&buf);
return err;
}
static int post_rpc(struct rpc_state *rpc)
{
struct active_request_slot *slot;
struct curl_slist *headers = NULL;
int use_gzip = rpc->gzip_request;
char *gzip_body = NULL;
size_t gzip_size = 0;
int err, large_request = 0;
/* Try to load the entire request, if we can fit it into the
* allocated buffer space we can use HTTP/1.0 and avoid the
* chunked encoding mess.
*/
while (1) {
size_t left = rpc->alloc - rpc->len;
char *buf = rpc->buf + rpc->len;
int n;
if (left < LARGE_PACKET_MAX) {
large_request = 1;
use_gzip = 0;
break;
}
n = packet_read(rpc->out, NULL, NULL, buf, left, 0);
if (!n)
break;
rpc->len += n;
}
if (large_request) {
do {
err = probe_rpc(rpc);
} while (err == HTTP_REAUTH);
if (err != HTTP_OK)
return -1;
}
headers = curl_slist_append(headers, rpc->hdr_content_type);
headers = curl_slist_append(headers, rpc->hdr_accept);
headers = curl_slist_append(headers, "Expect:");
retry:
slot = get_active_slot();
curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
curl_easy_setopt(slot->curl, CURLOPT_POST, 1);
curl_easy_setopt(slot->curl, CURLOPT_URL, rpc->service_url);
curl_easy_setopt(slot->curl, CURLOPT_ENCODING, "gzip");
if (large_request) {
/* The request body is large and the size cannot be predicted.
* We must use chunked encoding to send it.
*/
headers = curl_slist_append(headers, "Transfer-Encoding: chunked");
rpc->initial_buffer = 1;
curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, rpc_out);
curl_easy_setopt(slot->curl, CURLOPT_INFILE, rpc);
#ifndef NO_CURL_IOCTL
curl_easy_setopt(slot->curl, CURLOPT_IOCTLFUNCTION, rpc_ioctl);
curl_easy_setopt(slot->curl, CURLOPT_IOCTLDATA, rpc);
#endif
if (options.verbosity > 1) {
fprintf(stderr, "POST %s (chunked)\n", rpc->service_name);
fflush(stderr);
}
} else if (gzip_body) {
/*
* If we are looping to retry authentication, then the previous
* run will have set up the headers and gzip buffer already,
* and we just need to send it.
*/
curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, gzip_body);
curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE, gzip_size);
} else if (use_gzip && 1024 < rpc->len) {
/* The client backend isn't giving us compressed data so
* we can try to deflate it ourselves, this may save on.
* the transfer time.
*/
git_zstream stream;
int ret;
memset(&stream, 0, sizeof(stream));
git_deflate_init_gzip(&stream, Z_BEST_COMPRESSION);
gzip_size = git_deflate_bound(&stream, rpc->len);
gzip_body = xmalloc(gzip_size);
stream.next_in = (unsigned char *)rpc->buf;
stream.avail_in = rpc->len;
stream.next_out = (unsigned char *)gzip_body;
stream.avail_out = gzip_size;
ret = git_deflate(&stream, Z_FINISH);
if (ret != Z_STREAM_END)
die("cannot deflate request; zlib deflate error %d", ret);
ret = git_deflate_end_gently(&stream);
if (ret != Z_OK)
die("cannot deflate request; zlib end error %d", ret);
gzip_size = stream.total_out;
headers = curl_slist_append(headers, "Content-Encoding: gzip");
curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, gzip_body);
curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE, gzip_size);
if (options.verbosity > 1) {
fprintf(stderr, "POST %s (gzip %lu to %lu bytes)\n",
rpc->service_name,
(unsigned long)rpc->len, (unsigned long)gzip_size);
fflush(stderr);
}
} else {
/* We know the complete request size in advance, use the
* more normal Content-Length approach.
*/
curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, rpc->buf);
curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE, rpc->len);
if (options.verbosity > 1) {
fprintf(stderr, "POST %s (%lu bytes)\n",
rpc->service_name, (unsigned long)rpc->len);
fflush(stderr);
}
}
curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, rpc_in);
curl_easy_setopt(slot->curl, CURLOPT_FILE, rpc);
err = run_slot(slot);
if (err == HTTP_REAUTH && !large_request)
goto retry;
if (err != HTTP_OK)
err = -1;
curl_slist_free_all(headers);
free(gzip_body);
return err;
}
static int rpc_service(struct rpc_state *rpc, struct discovery *heads)
{
const char *svc = rpc->service_name;
struct strbuf buf = STRBUF_INIT;
struct strbuf *preamble = rpc->stdin_preamble;
struct child_process client;
int err = 0;
memset(&client, 0, sizeof(client));
client.in = -1;
client.out = -1;
client.git_cmd = 1;
client.argv = rpc->argv;
if (start_command(&client))
exit(1);
if (preamble)
write_or_die(client.in, preamble->buf, preamble->len);
if (heads)
write_or_die(client.in, heads->buf, heads->len);
rpc->alloc = http_post_buffer;
rpc->buf = xmalloc(rpc->alloc);
rpc->in = client.in;
rpc->out = client.out;
strbuf_init(&rpc->result, 0);
strbuf_addf(&buf, "%s%s", url, svc);
rpc->service_url = strbuf_detach(&buf, NULL);
strbuf_addf(&buf, "Content-Type: application/x-%s-request", svc);
rpc->hdr_content_type = strbuf_detach(&buf, NULL);
strbuf_addf(&buf, "Accept: application/x-%s-result", svc);
rpc->hdr_accept = strbuf_detach(&buf, NULL);
while (!err) {
int n = packet_read(rpc->out, NULL, NULL, rpc->buf, rpc->alloc, 0);
if (!n)
break;
rpc->pos = 0;
rpc->len = n;
err |= post_rpc(rpc);
}
close(client.in);
client.in = -1;
if (!err) {
strbuf_read(&rpc->result, client.out, 0);
} else {
char buf[4096];
for (;;)
if (xread(client.out, buf, sizeof(buf)) <= 0)
break;
}
close(client.out);
client.out = -1;
err |= finish_command(&client);
free(rpc->service_url);
free(rpc->hdr_content_type);
free(rpc->hdr_accept);
free(rpc->buf);
strbuf_release(&buf);
return err;
}
static int fetch_dumb(int nr_heads, struct ref **to_fetch)
{
struct walker *walker;
char **targets = xmalloc(nr_heads * sizeof(char*));
int ret, i;
if (options.depth)
die("dumb http transport does not support --depth");
for (i = 0; i < nr_heads; i++)
targets[i] = xstrdup(sha1_to_hex(to_fetch[i]->old_sha1));
walker = get_http_walker(url);
walker->get_all = 1;
walker->get_tree = 1;
walker->get_history = 1;
walker->get_verbosely = options.verbosity >= 3;
walker->get_recover = 0;
ret = walker_fetch(walker, nr_heads, targets, NULL, NULL);
walker_free(walker);
for (i = 0; i < nr_heads; i++)
free(targets[i]);
free(targets);
return ret ? error("Fetch failed.") : 0;
}
static int fetch_git(struct discovery *heads,
int nr_heads, struct ref **to_fetch)
{
struct rpc_state rpc;
struct strbuf preamble = STRBUF_INIT;
char *depth_arg = NULL;
int argc = 0, i, err;
const char *argv[16];
argv[argc++] = "fetch-pack";
argv[argc++] = "--stateless-rpc";
argv[argc++] = "--stdin";
argv[argc++] = "--lock-pack";
if (options.followtags)
argv[argc++] = "--include-tag";
if (options.thin)
argv[argc++] = "--thin";
if (options.verbosity >= 3) {
argv[argc++] = "-v";
argv[argc++] = "-v";
}
if (options.check_self_contained_and_connected)
argv[argc++] = "--check-self-contained-and-connected";
if (!options.progress)
argv[argc++] = "--no-progress";
if (options.depth) {
struct strbuf buf = STRBUF_INIT;
strbuf_addf(&buf, "--depth=%lu", options.depth);
depth_arg = strbuf_detach(&buf, NULL);
argv[argc++] = depth_arg;
}
argv[argc++] = url;
argv[argc++] = NULL;
for (i = 0; i < nr_heads; i++) {
struct ref *ref = to_fetch[i];
if (!ref->name || !*ref->name)
die("cannot fetch by sha1 over smart http");
packet_buf_write(&preamble, "%s\n", ref->name);
}
packet_buf_flush(&preamble);
memset(&rpc, 0, sizeof(rpc));
rpc.service_name = "git-upload-pack",
rpc.argv = argv;
rpc.stdin_preamble = &preamble;
rpc.gzip_request = 1;
err = rpc_service(&rpc, heads);
if (rpc.result.len)
write_or_die(1, rpc.result.buf, rpc.result.len);
strbuf_release(&rpc.result);
strbuf_release(&preamble);
free(depth_arg);
return err;
}
static int fetch(int nr_heads, struct ref **to_fetch)
{
struct discovery *d = discover_refs("git-upload-pack", 0);
if (d->proto_git)
return fetch_git(d, nr_heads, to_fetch);
else
return fetch_dumb(nr_heads, to_fetch);
}
static void parse_fetch(struct strbuf *buf)
{
struct ref **to_fetch = NULL;
struct ref *list_head = NULL;
struct ref **list = &list_head;
int alloc_heads = 0, nr_heads = 0;
do {
if (!prefixcmp(buf->buf, "fetch ")) {
char *p = buf->buf + strlen("fetch ");
char *name;
struct ref *ref;
unsigned char old_sha1[20];
if (strlen(p) < 40 || get_sha1_hex(p, old_sha1))
die("protocol error: expected sha/ref, got %s'", p);
if (p[40] == ' ')
name = p + 41;
else if (!p[40])
name = "";
else
die("protocol error: expected sha/ref, got %s'", p);
ref = alloc_ref(name);
hashcpy(ref->old_sha1, old_sha1);
*list = ref;
list = &ref->next;
ALLOC_GROW(to_fetch, nr_heads + 1, alloc_heads);
to_fetch[nr_heads++] = ref;
}
else
die("http transport does not support %s", buf->buf);
strbuf_reset(buf);
if (strbuf_getline(buf, stdin, '\n') == EOF)
return;
if (!*buf->buf)
break;
} while (1);
if (fetch(nr_heads, to_fetch))
exit(128); /* error already reported */
free_refs(list_head);
free(to_fetch);
printf("\n");
fflush(stdout);
strbuf_reset(buf);
}
static int push_dav(int nr_spec, char **specs)
{
const char **argv = xmalloc((10 + nr_spec) * sizeof(char*));
int argc = 0, i;
argv[argc++] = "http-push";
argv[argc++] = "--helper-status";
if (options.dry_run)
argv[argc++] = "--dry-run";
if (options.verbosity > 1)
argv[argc++] = "--verbose";
argv[argc++] = url;
for (i = 0; i < nr_spec; i++)
argv[argc++] = specs[i];
argv[argc++] = NULL;
if (run_command_v_opt(argv, RUN_GIT_CMD))
die("git-%s failed", argv[0]);
free(argv);
return 0;
}
static int push_git(struct discovery *heads, int nr_spec, char **specs)
{
struct rpc_state rpc;
int i, err;
struct argv_array args;
struct string_list_item *cas_option;
argv_array_init(&args);
argv_array_pushl(&args, "send-pack", "--stateless-rpc", "--helper-status",
NULL);
if (options.thin)
argv_array_push(&args, "--thin");
if (options.dry_run)
argv_array_push(&args, "--dry-run");
if (options.verbosity == 0)
argv_array_push(&args, "--quiet");
else if (options.verbosity > 1)
argv_array_push(&args, "--verbose");
argv_array_push(&args, options.progress ? "--progress" : "--no-progress");
for_each_string_list_item(cas_option, &cas_options)
argv_array_push(&args, cas_option->string);
argv_array_push(&args, url);
for (i = 0; i < nr_spec; i++)
argv_array_push(&args, specs[i]);
memset(&rpc, 0, sizeof(rpc));
rpc.service_name = "git-receive-pack",
rpc.argv = args.argv;
err = rpc_service(&rpc, heads);
if (rpc.result.len)
write_or_die(1, rpc.result.buf, rpc.result.len);
strbuf_release(&rpc.result);
argv_array_clear(&args);
return err;
}
static int push(int nr_spec, char **specs)
{
struct discovery *heads = discover_refs("git-receive-pack", 1);
int ret;
if (heads->proto_git)
ret = push_git(heads, nr_spec, specs);
else
ret = push_dav(nr_spec, specs);
free_discovery(heads);
return ret;
}
static void parse_push(struct strbuf *buf)
{
char **specs = NULL;
int alloc_spec = 0, nr_spec = 0, i, ret;
do {
if (!prefixcmp(buf->buf, "push ")) {
ALLOC_GROW(specs, nr_spec + 1, alloc_spec);
specs[nr_spec++] = xstrdup(buf->buf + 5);
}
else
die("http transport does not support %s", buf->buf);
strbuf_reset(buf);
if (strbuf_getline(buf, stdin, '\n') == EOF)
goto free_specs;
if (!*buf->buf)
break;
} while (1);
ret = push(nr_spec, specs);
printf("\n");
fflush(stdout);
if (ret)
exit(128); /* error already reported */
free_specs:
for (i = 0; i < nr_spec; i++)
free(specs[i]);
free(specs);
}
int main(int argc, const char **argv)
{
struct strbuf buf = STRBUF_INIT;
int nongit;
git_extract_argv0_path(argv[0]);
setup_git_directory_gently(&nongit);
if (argc < 2) {
fprintf(stderr, "Remote needed\n");
return 1;
}
options.verbosity = 1;
options.progress = !!isatty(2);
options.thin = 1;
remote = remote_get(argv[1]);
if (argc > 2) {
end_url_with_slash(&buf, argv[2]);
} else {
end_url_with_slash(&buf, remote->url[0]);
}
url = strbuf_detach(&buf, NULL);
http_init(remote, url, 0);
do {
if (strbuf_getline(&buf, stdin, '\n') == EOF) {
if (ferror(stdin))
fprintf(stderr, "Error reading command stream\n");
else
fprintf(stderr, "Unexpected end of command stream\n");
return 1;
}
if (buf.len == 0)
break;
if (!prefixcmp(buf.buf, "fetch ")) {
if (nongit)
die("Fetch attempted without a local repo");
parse_fetch(&buf);
} else if (!strcmp(buf.buf, "list") || !prefixcmp(buf.buf, "list ")) {
int for_push = !!strstr(buf.buf + 4, "for-push");
output_refs(get_refs(for_push));
} else if (!prefixcmp(buf.buf, "push ")) {
parse_push(&buf);
} else if (!prefixcmp(buf.buf, "option ")) {
char *name = buf.buf + strlen("option ");
char *value = strchr(name, ' ');
int result;
if (value)
*value++ = '\0';
else
value = "true";
result = set_option(name, value);
if (!result)
printf("ok\n");
else if (result < 0)
printf("error invalid value\n");
else
printf("unsupported\n");
fflush(stdout);
} else if (!strcmp(buf.buf, "capabilities")) {
printf("fetch\n");
printf("option\n");
printf("push\n");
printf("check-connectivity\n");
printf("\n");
fflush(stdout);
} else {
fprintf(stderr, "Unknown command '%s'\n", buf.buf);
return 1;
}
strbuf_reset(&buf);
} while (1);
http_cleanup();
return 0;
}