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git/http-push.c
Junio C Hamano 34f5130af8 Merge branch 'jc/merge-bases' 
Optimise the "merge-base" computation a bit, and also update its
users that do not need the full merge-base information to call a
cheaper subset.

* jc/merge-bases:
  reduce_heads(): reimplement on top of remove_redundant()
  merge-base: "--is-ancestor A B"
  get_merge_bases_many(): walk from many tips in parallel
  in_merge_bases(): use paint_down_to_common()
  merge_bases_many(): split out the logic to paint history
  in_merge_bases(): omit unnecessary redundant common ancestor reduction
  http-push: use in_merge_bases() for fast-forward check
  receive-pack: use in_merge_bases() for fast-forward check
  in_merge_bases(): support only one "other" commit
2012-09-11 11:36:05 -07:00

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#include "cache.h"
#include "commit.h"
#include "tag.h"
#include "blob.h"
#include "http.h"
#include "refs.h"
#include "diff.h"
#include "revision.h"
#include "exec_cmd.h"
#include "remote.h"
#include "list-objects.h"
#include "sigchain.h"
#include <expat.h>
static const char http_push_usage[] =
"git http-push [--all] [--dry-run] [--force] [--verbose] <remote> [<head>...]\n";
#ifndef XML_STATUS_OK
enum XML_Status {
XML_STATUS_OK = 1,
XML_STATUS_ERROR = 0
};
#define XML_STATUS_OK 1
#define XML_STATUS_ERROR 0
#endif
#define PREV_BUF_SIZE 4096
/* DAV methods */
#define DAV_LOCK "LOCK"
#define DAV_MKCOL "MKCOL"
#define DAV_MOVE "MOVE"
#define DAV_PROPFIND "PROPFIND"
#define DAV_PUT "PUT"
#define DAV_UNLOCK "UNLOCK"
#define DAV_DELETE "DELETE"
/* DAV lock flags */
#define DAV_PROP_LOCKWR (1u << 0)
#define DAV_PROP_LOCKEX (1u << 1)
#define DAV_LOCK_OK (1u << 2)
/* DAV XML properties */
#define DAV_CTX_LOCKENTRY ".multistatus.response.propstat.prop.supportedlock.lockentry"
#define DAV_CTX_LOCKTYPE_WRITE ".multistatus.response.propstat.prop.supportedlock.lockentry.locktype.write"
#define DAV_CTX_LOCKTYPE_EXCLUSIVE ".multistatus.response.propstat.prop.supportedlock.lockentry.lockscope.exclusive"
#define DAV_ACTIVELOCK_OWNER ".prop.lockdiscovery.activelock.owner.href"
#define DAV_ACTIVELOCK_TIMEOUT ".prop.lockdiscovery.activelock.timeout"
#define DAV_ACTIVELOCK_TOKEN ".prop.lockdiscovery.activelock.locktoken.href"
#define DAV_PROPFIND_RESP ".multistatus.response"
#define DAV_PROPFIND_NAME ".multistatus.response.href"
#define DAV_PROPFIND_COLLECTION ".multistatus.response.propstat.prop.resourcetype.collection"
/* DAV request body templates */
#define PROPFIND_SUPPORTEDLOCK_REQUEST "<?xml version=\"1.0\" encoding=\"utf-8\" ?>\n<D:propfind xmlns:D=\"DAV:\">\n<D:prop xmlns:R=\"%s\">\n<D:supportedlock/>\n</D:prop>\n</D:propfind>"
#define PROPFIND_ALL_REQUEST "<?xml version=\"1.0\" encoding=\"utf-8\" ?>\n<D:propfind xmlns:D=\"DAV:\">\n<D:allprop/>\n</D:propfind>"
#define LOCK_REQUEST "<?xml version=\"1.0\" encoding=\"utf-8\" ?>\n<D:lockinfo xmlns:D=\"DAV:\">\n<D:lockscope><D:exclusive/></D:lockscope>\n<D:locktype><D:write/></D:locktype>\n<D:owner>\n<D:href>mailto:%s</D:href>\n</D:owner>\n</D:lockinfo>"
#define LOCK_TIME 600
#define LOCK_REFRESH 30
/* bits #0-15 in revision.h */
#define LOCAL (1u<<16)
#define REMOTE (1u<<17)
#define FETCHING (1u<<18)
#define PUSHING (1u<<19)
/* We allow "recursive" symbolic refs. Only within reason, though */
#define MAXDEPTH 5
static int pushing;
static int aborted;
static signed char remote_dir_exists[256];
static int push_verbosely;
static int push_all = MATCH_REFS_NONE;
static int force_all;
static int dry_run;
static int helper_status;
static struct object_list *objects;
struct repo {
char *url;
char *path;
int path_len;
int has_info_refs;
int can_update_info_refs;
int has_info_packs;
struct packed_git *packs;
struct remote_lock *locks;
};
static struct repo *repo;
enum transfer_state {
NEED_FETCH,
RUN_FETCH_LOOSE,
RUN_FETCH_PACKED,
NEED_PUSH,
RUN_MKCOL,
RUN_PUT,
RUN_MOVE,
ABORTED,
COMPLETE
};
struct transfer_request {
struct object *obj;
char *url;
char *dest;
struct remote_lock *lock;
struct curl_slist *headers;
struct buffer buffer;
enum transfer_state state;
CURLcode curl_result;
char errorstr[CURL_ERROR_SIZE];
long http_code;
void *userData;
struct active_request_slot *slot;
struct transfer_request *next;
};
static struct transfer_request *request_queue_head;
struct xml_ctx {
char *name;
int len;
char *cdata;
void (*userFunc)(struct xml_ctx *ctx, int tag_closed);
void *userData;
};
struct remote_lock {
char *url;
char *owner;
char *token;
char tmpfile_suffix[41];
time_t start_time;
long timeout;
int refreshing;
struct remote_lock *next;
};
/* Flags that control remote_ls processing */
#define PROCESS_FILES (1u << 0)
#define PROCESS_DIRS (1u << 1)
#define RECURSIVE (1u << 2)
/* Flags that remote_ls passes to callback functions */
#define IS_DIR (1u << 0)
struct remote_ls_ctx {
char *path;
void (*userFunc)(struct remote_ls_ctx *ls);
void *userData;
int flags;
char *dentry_name;
int dentry_flags;
struct remote_ls_ctx *parent;
};
/* get_dav_token_headers options */
enum dav_header_flag {
DAV_HEADER_IF = (1u << 0),
DAV_HEADER_LOCK = (1u << 1),
DAV_HEADER_TIMEOUT = (1u << 2)
};
static char *xml_entities(const char *s)
{
struct strbuf buf = STRBUF_INIT;
while (*s) {
size_t len = strcspn(s, "\"<>&");
strbuf_add(&buf, s, len);
s += len;
switch (*s) {
case '"':
strbuf_addstr(&buf, "&quot;");
break;
case '<':
strbuf_addstr(&buf, "&lt;");
break;
case '>':
strbuf_addstr(&buf, "&gt;");
break;
case '&':
strbuf_addstr(&buf, "&amp;");
break;
case 0:
return strbuf_detach(&buf, NULL);
}
s++;
}
return strbuf_detach(&buf, NULL);
}
static void curl_setup_http_get(CURL *curl, const char *url,
const char *custom_req)
{
curl_easy_setopt(curl, CURLOPT_HTTPGET, 1);
curl_easy_setopt(curl, CURLOPT_URL, url);
curl_easy_setopt(curl, CURLOPT_CUSTOMREQUEST, custom_req);
curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, fwrite_null);
}
static void curl_setup_http(CURL *curl, const char *url,
const char *custom_req, struct buffer *buffer,
curl_write_callback write_fn)
{
curl_easy_setopt(curl, CURLOPT_PUT, 1);
curl_easy_setopt(curl, CURLOPT_URL, url);
curl_easy_setopt(curl, CURLOPT_INFILE, buffer);
curl_easy_setopt(curl, CURLOPT_INFILESIZE, buffer->buf.len);
curl_easy_setopt(curl, CURLOPT_READFUNCTION, fread_buffer);
#ifndef NO_CURL_IOCTL
curl_easy_setopt(curl, CURLOPT_IOCTLFUNCTION, ioctl_buffer);
curl_easy_setopt(curl, CURLOPT_IOCTLDATA, &buffer);
#endif
curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_fn);
curl_easy_setopt(curl, CURLOPT_NOBODY, 0);
curl_easy_setopt(curl, CURLOPT_CUSTOMREQUEST, custom_req);
curl_easy_setopt(curl, CURLOPT_UPLOAD, 1);
}
static struct curl_slist *get_dav_token_headers(struct remote_lock *lock, enum dav_header_flag options)
{
struct strbuf buf = STRBUF_INIT;
struct curl_slist *dav_headers = NULL;
if (options & DAV_HEADER_IF) {
strbuf_addf(&buf, "If: (<%s>)", lock->token);
dav_headers = curl_slist_append(dav_headers, buf.buf);
strbuf_reset(&buf);
}
if (options & DAV_HEADER_LOCK) {
strbuf_addf(&buf, "Lock-Token: <%s>", lock->token);
dav_headers = curl_slist_append(dav_headers, buf.buf);
strbuf_reset(&buf);
}
if (options & DAV_HEADER_TIMEOUT) {
strbuf_addf(&buf, "Timeout: Second-%ld", lock->timeout);
dav_headers = curl_slist_append(dav_headers, buf.buf);
strbuf_reset(&buf);
}
strbuf_release(&buf);
return dav_headers;
}
static void finish_request(struct transfer_request *request);
static void release_request(struct transfer_request *request);
static void process_response(void *callback_data)
{
struct transfer_request *request =
(struct transfer_request *)callback_data;
finish_request(request);
}
#ifdef USE_CURL_MULTI
static void start_fetch_loose(struct transfer_request *request)
{
struct active_request_slot *slot;
struct http_object_request *obj_req;
obj_req = new_http_object_request(repo->url, request->obj->sha1);
if (obj_req == NULL) {
request->state = ABORTED;
return;
}
slot = obj_req->slot;
slot->callback_func = process_response;
slot->callback_data = request;
request->slot = slot;
request->userData = obj_req;
/* Try to get the request started, abort the request on error */
request->state = RUN_FETCH_LOOSE;
if (!start_active_slot(slot)) {
fprintf(stderr, "Unable to start GET request\n");
repo->can_update_info_refs = 0;
release_http_object_request(obj_req);
release_request(request);
}
}
static void start_mkcol(struct transfer_request *request)
{
char *hex = sha1_to_hex(request->obj->sha1);
struct active_request_slot *slot;
request->url = get_remote_object_url(repo->url, hex, 1);
slot = get_active_slot();
slot->callback_func = process_response;
slot->callback_data = request;
curl_setup_http_get(slot->curl, request->url, DAV_MKCOL);
curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, request->errorstr);
if (start_active_slot(slot)) {
request->slot = slot;
request->state = RUN_MKCOL;
} else {
request->state = ABORTED;
free(request->url);
request->url = NULL;
}
}
#endif
static void start_fetch_packed(struct transfer_request *request)
{
struct packed_git *target;
struct transfer_request *check_request = request_queue_head;
struct http_pack_request *preq;
target = find_sha1_pack(request->obj->sha1, repo->packs);
if (!target) {
fprintf(stderr, "Unable to fetch %s, will not be able to update server info refs\n", sha1_to_hex(request->obj->sha1));
repo->can_update_info_refs = 0;
release_request(request);
return;
}
fprintf(stderr, "Fetching pack %s\n", sha1_to_hex(target->sha1));
fprintf(stderr, " which contains %s\n", sha1_to_hex(request->obj->sha1));
preq = new_http_pack_request(target, repo->url);
if (preq == NULL) {
release_http_pack_request(preq);
repo->can_update_info_refs = 0;
return;
}
preq->lst = &repo->packs;
/* Make sure there isn't another open request for this pack */
while (check_request) {
if (check_request->state == RUN_FETCH_PACKED &&
!strcmp(check_request->url, preq->url)) {
release_http_pack_request(preq);
release_request(request);
return;
}
check_request = check_request->next;
}
preq->slot->callback_func = process_response;
preq->slot->callback_data = request;
request->slot = preq->slot;
request->userData = preq;
/* Try to get the request started, abort the request on error */
request->state = RUN_FETCH_PACKED;
if (!start_active_slot(preq->slot)) {
fprintf(stderr, "Unable to start GET request\n");
release_http_pack_request(preq);
repo->can_update_info_refs = 0;
release_request(request);
}
}
static void start_put(struct transfer_request *request)
{
char *hex = sha1_to_hex(request->obj->sha1);
struct active_request_slot *slot;
struct strbuf buf = STRBUF_INIT;
enum object_type type;
char hdr[50];
void *unpacked;
unsigned long len;
int hdrlen;
ssize_t size;
git_zstream stream;
unpacked = read_sha1_file(request->obj->sha1, &type, &len);
hdrlen = sprintf(hdr, "%s %lu", typename(type), len) + 1;
/* Set it up */
memset(&stream, 0, sizeof(stream));
git_deflate_init(&stream, zlib_compression_level);
size = git_deflate_bound(&stream, len + hdrlen);
strbuf_init(&request->buffer.buf, size);
request->buffer.posn = 0;
/* Compress it */
stream.next_out = (unsigned char *)request->buffer.buf.buf;
stream.avail_out = size;
/* First header.. */
stream.next_in = (void *)hdr;
stream.avail_in = hdrlen;
while (git_deflate(&stream, 0) == Z_OK)
; /* nothing */
/* Then the data itself.. */
stream.next_in = unpacked;
stream.avail_in = len;
while (git_deflate(&stream, Z_FINISH) == Z_OK)
; /* nothing */
git_deflate_end(&stream);
free(unpacked);
request->buffer.buf.len = stream.total_out;
strbuf_addstr(&buf, "Destination: ");
append_remote_object_url(&buf, repo->url, hex, 0);
request->dest = strbuf_detach(&buf, NULL);
append_remote_object_url(&buf, repo->url, hex, 0);
strbuf_add(&buf, request->lock->tmpfile_suffix, 41);
request->url = strbuf_detach(&buf, NULL);
slot = get_active_slot();
slot->callback_func = process_response;
slot->callback_data = request;
curl_setup_http(slot->curl, request->url, DAV_PUT,
&request->buffer, fwrite_null);
if (start_active_slot(slot)) {
request->slot = slot;
request->state = RUN_PUT;
} else {
request->state = ABORTED;
free(request->url);
request->url = NULL;
}
}
static void start_move(struct transfer_request *request)
{
struct active_request_slot *slot;
struct curl_slist *dav_headers = NULL;
slot = get_active_slot();
slot->callback_func = process_response;
slot->callback_data = request;
curl_setup_http_get(slot->curl, request->url, DAV_MOVE);
dav_headers = curl_slist_append(dav_headers, request->dest);
dav_headers = curl_slist_append(dav_headers, "Overwrite: T");
curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
if (start_active_slot(slot)) {
request->slot = slot;
request->state = RUN_MOVE;
} else {
request->state = ABORTED;
free(request->url);
request->url = NULL;
}
}
static int refresh_lock(struct remote_lock *lock)
{
struct active_request_slot *slot;
struct slot_results results;
struct curl_slist *dav_headers;
int rc = 0;
lock->refreshing = 1;
dav_headers = get_dav_token_headers(lock, DAV_HEADER_IF | DAV_HEADER_TIMEOUT);
slot = get_active_slot();
slot->results = &results;
curl_setup_http_get(slot->curl, lock->url, DAV_LOCK);
curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
if (start_active_slot(slot)) {
run_active_slot(slot);
if (results.curl_result != CURLE_OK) {
fprintf(stderr, "LOCK HTTP error %ld\n",
results.http_code);
} else {
lock->start_time = time(NULL);
rc = 1;
}
}
lock->refreshing = 0;
curl_slist_free_all(dav_headers);
return rc;
}
static void check_locks(void)
{
struct remote_lock *lock = repo->locks;
time_t current_time = time(NULL);
int time_remaining;
while (lock) {
time_remaining = lock->start_time + lock->timeout -
current_time;
if (!lock->refreshing && time_remaining < LOCK_REFRESH) {
if (!refresh_lock(lock)) {
fprintf(stderr,
"Unable to refresh lock for %s\n",
lock->url);
aborted = 1;
return;
}
}
lock = lock->next;
}
}
static void release_request(struct transfer_request *request)
{
struct transfer_request *entry = request_queue_head;
if (request == request_queue_head) {
request_queue_head = request->next;
} else {
while (entry->next != NULL && entry->next != request)
entry = entry->next;
if (entry->next == request)
entry->next = entry->next->next;
}
free(request->url);
free(request);
}
static void finish_request(struct transfer_request *request)
{
struct http_pack_request *preq;
struct http_object_request *obj_req;
request->curl_result = request->slot->curl_result;
request->http_code = request->slot->http_code;
request->slot = NULL;
/* Keep locks active */
check_locks();
if (request->headers != NULL)
curl_slist_free_all(request->headers);
/* URL is reused for MOVE after PUT */
if (request->state != RUN_PUT) {
free(request->url);
request->url = NULL;
}
if (request->state == RUN_MKCOL) {
if (request->curl_result == CURLE_OK ||
request->http_code == 405) {
remote_dir_exists[request->obj->sha1[0]] = 1;
start_put(request);
} else {
fprintf(stderr, "MKCOL %s failed, aborting (%d/%ld)\n",
sha1_to_hex(request->obj->sha1),
request->curl_result, request->http_code);
request->state = ABORTED;
aborted = 1;
}
} else if (request->state == RUN_PUT) {
if (request->curl_result == CURLE_OK) {
start_move(request);
} else {
fprintf(stderr, "PUT %s failed, aborting (%d/%ld)\n",
sha1_to_hex(request->obj->sha1),
request->curl_result, request->http_code);
request->state = ABORTED;
aborted = 1;
}
} else if (request->state == RUN_MOVE) {
if (request->curl_result == CURLE_OK) {
if (push_verbosely)
fprintf(stderr, " sent %s\n",
sha1_to_hex(request->obj->sha1));
request->obj->flags |= REMOTE;
release_request(request);
} else {
fprintf(stderr, "MOVE %s failed, aborting (%d/%ld)\n",
sha1_to_hex(request->obj->sha1),
request->curl_result, request->http_code);
request->state = ABORTED;
aborted = 1;
}
} else if (request->state == RUN_FETCH_LOOSE) {
obj_req = (struct http_object_request *)request->userData;
if (finish_http_object_request(obj_req) == 0)
if (obj_req->rename == 0)
request->obj->flags |= (LOCAL | REMOTE);
/* Try fetching packed if necessary */
if (request->obj->flags & LOCAL) {
release_http_object_request(obj_req);
release_request(request);
} else
start_fetch_packed(request);
} else if (request->state == RUN_FETCH_PACKED) {
int fail = 1;
if (request->curl_result != CURLE_OK) {
fprintf(stderr, "Unable to get pack file %s\n%s",
request->url, curl_errorstr);
} else {
preq = (struct http_pack_request *)request->userData;
if (preq) {
if (finish_http_pack_request(preq) == 0)
fail = 0;
release_http_pack_request(preq);
}
}
if (fail)
repo->can_update_info_refs = 0;
release_request(request);
}
}
#ifdef USE_CURL_MULTI
static int is_running_queue;
static int fill_active_slot(void *unused)
{
struct transfer_request *request;
if (aborted || !is_running_queue)
return 0;
for (request = request_queue_head; request; request = request->next) {
if (request->state == NEED_FETCH) {
start_fetch_loose(request);
return 1;
} else if (pushing && request->state == NEED_PUSH) {
if (remote_dir_exists[request->obj->sha1[0]] == 1) {
start_put(request);
} else {
start_mkcol(request);
}
return 1;
}
}
return 0;
}
#endif
static void get_remote_object_list(unsigned char parent);
static void add_fetch_request(struct object *obj)
{
struct transfer_request *request;
check_locks();
/*
* Don't fetch the object if it's known to exist locally
* or is already in the request queue
*/
if (remote_dir_exists[obj->sha1[0]] == -1)
get_remote_object_list(obj->sha1[0]);
if (obj->flags & (LOCAL | FETCHING))
return;
obj->flags |= FETCHING;
request = xmalloc(sizeof(*request));
request->obj = obj;
request->url = NULL;
request->lock = NULL;
request->headers = NULL;
request->state = NEED_FETCH;
request->next = request_queue_head;
request_queue_head = request;
#ifdef USE_CURL_MULTI
fill_active_slots();
step_active_slots();
#endif
}
static int add_send_request(struct object *obj, struct remote_lock *lock)
{
struct transfer_request *request = request_queue_head;
struct packed_git *target;
/* Keep locks active */
check_locks();
/*
* Don't push the object if it's known to exist on the remote
* or is already in the request queue
*/
if (remote_dir_exists[obj->sha1[0]] == -1)
get_remote_object_list(obj->sha1[0]);
if (obj->flags & (REMOTE | PUSHING))
return 0;
target = find_sha1_pack(obj->sha1, repo->packs);
if (target) {
obj->flags |= REMOTE;
return 0;
}
obj->flags |= PUSHING;
request = xmalloc(sizeof(*request));
request->obj = obj;
request->url = NULL;
request->lock = lock;
request->headers = NULL;
request->state = NEED_PUSH;
request->next = request_queue_head;
request_queue_head = request;
#ifdef USE_CURL_MULTI
fill_active_slots();
step_active_slots();
#endif
return 1;
}
static int fetch_indices(void)
{
int ret;
if (push_verbosely)
fprintf(stderr, "Getting pack list\n");
switch (http_get_info_packs(repo->url, &repo->packs)) {
case HTTP_OK:
case HTTP_MISSING_TARGET:
ret = 0;
break;
default:
ret = -1;
}
return ret;
}
static void one_remote_object(const char *hex)
{
unsigned char sha1[20];
struct object *obj;
if (get_sha1_hex(hex, sha1) != 0)
return;
obj = lookup_object(sha1);
if (!obj)
obj = parse_object(sha1);
/* Ignore remote objects that don't exist locally */
if (!obj)
return;
obj->flags |= REMOTE;
if (!object_list_contains(objects, obj))
object_list_insert(obj, &objects);
}
static void handle_lockprop_ctx(struct xml_ctx *ctx, int tag_closed)
{
int *lock_flags = (int *)ctx->userData;
if (tag_closed) {
if (!strcmp(ctx->name, DAV_CTX_LOCKENTRY)) {
if ((*lock_flags & DAV_PROP_LOCKEX) &&
(*lock_flags & DAV_PROP_LOCKWR)) {
*lock_flags |= DAV_LOCK_OK;
}
*lock_flags &= DAV_LOCK_OK;
} else if (!strcmp(ctx->name, DAV_CTX_LOCKTYPE_WRITE)) {
*lock_flags |= DAV_PROP_LOCKWR;
} else if (!strcmp(ctx->name, DAV_CTX_LOCKTYPE_EXCLUSIVE)) {
*lock_flags |= DAV_PROP_LOCKEX;
}
}
}
static void handle_new_lock_ctx(struct xml_ctx *ctx, int tag_closed)
{
struct remote_lock *lock = (struct remote_lock *)ctx->userData;
git_SHA_CTX sha_ctx;
unsigned char lock_token_sha1[20];
if (tag_closed && ctx->cdata) {
if (!strcmp(ctx->name, DAV_ACTIVELOCK_OWNER)) {
lock->owner = xmalloc(strlen(ctx->cdata) + 1);
strcpy(lock->owner, ctx->cdata);
} else if (!strcmp(ctx->name, DAV_ACTIVELOCK_TIMEOUT)) {
if (!prefixcmp(ctx->cdata, "Second-"))
lock->timeout =
strtol(ctx->cdata + 7, NULL, 10);
} else if (!strcmp(ctx->name, DAV_ACTIVELOCK_TOKEN)) {
lock->token = xmalloc(strlen(ctx->cdata) + 1);
strcpy(lock->token, ctx->cdata);
git_SHA1_Init(&sha_ctx);
git_SHA1_Update(&sha_ctx, lock->token, strlen(lock->token));
git_SHA1_Final(lock_token_sha1, &sha_ctx);
lock->tmpfile_suffix[0] = '_';
memcpy(lock->tmpfile_suffix + 1, sha1_to_hex(lock_token_sha1), 40);
}
}
}
static void one_remote_ref(const char *refname);
static void
xml_start_tag(void *userData, const char *name, const char **atts)
{
struct xml_ctx *ctx = (struct xml_ctx *)userData;
const char *c = strchr(name, ':');
int new_len;
if (c == NULL)
c = name;
else
c++;
new_len = strlen(ctx->name) + strlen(c) + 2;
if (new_len > ctx->len) {
ctx->name = xrealloc(ctx->name, new_len);
ctx->len = new_len;
}
strcat(ctx->name, ".");
strcat(ctx->name, c);
free(ctx->cdata);
ctx->cdata = NULL;
ctx->userFunc(ctx, 0);
}
static void
xml_end_tag(void *userData, const char *name)
{
struct xml_ctx *ctx = (struct xml_ctx *)userData;
const char *c = strchr(name, ':');
char *ep;
ctx->userFunc(ctx, 1);
if (c == NULL)
c = name;
else
c++;
ep = ctx->name + strlen(ctx->name) - strlen(c) - 1;
*ep = 0;
}
static void
xml_cdata(void *userData, const XML_Char *s, int len)
{
struct xml_ctx *ctx = (struct xml_ctx *)userData;
free(ctx->cdata);
ctx->cdata = xmemdupz(s, len);
}
static struct remote_lock *lock_remote(const char *path, long timeout)
{
struct active_request_slot *slot;
struct slot_results results;
struct buffer out_buffer = { STRBUF_INIT, 0 };
struct strbuf in_buffer = STRBUF_INIT;
char *url;
char *ep;
char timeout_header[25];
struct remote_lock *lock = NULL;
struct curl_slist *dav_headers = NULL;
struct xml_ctx ctx;
char *escaped;
url = xmalloc(strlen(repo->url) + strlen(path) + 1);
sprintf(url, "%s%s", repo->url, path);
/* Make sure leading directories exist for the remote ref */
ep = strchr(url + strlen(repo->url) + 1, '/');
while (ep) {
char saved_character = ep[1];
ep[1] = '\0';
slot = get_active_slot();
slot->results = &results;
curl_setup_http_get(slot->curl, url, DAV_MKCOL);
if (start_active_slot(slot)) {
run_active_slot(slot);
if (results.curl_result != CURLE_OK &&
results.http_code != 405) {
fprintf(stderr,
"Unable to create branch path %s\n",
url);
free(url);
return NULL;
}
} else {
fprintf(stderr, "Unable to start MKCOL request\n");
free(url);
return NULL;
}
ep[1] = saved_character;
ep = strchr(ep + 1, '/');
}
escaped = xml_entities(ident_default_email());
strbuf_addf(&out_buffer.buf, LOCK_REQUEST, escaped);
free(escaped);
sprintf(timeout_header, "Timeout: Second-%ld", timeout);
dav_headers = curl_slist_append(dav_headers, timeout_header);
dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
slot = get_active_slot();
slot->results = &results;
curl_setup_http(slot->curl, url, DAV_LOCK, &out_buffer, fwrite_buffer);
curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
lock = xcalloc(1, sizeof(*lock));
lock->timeout = -1;
if (start_active_slot(slot)) {
run_active_slot(slot);
if (results.curl_result == CURLE_OK) {
XML_Parser parser = XML_ParserCreate(NULL);
enum XML_Status result;
ctx.name = xcalloc(10, 1);
ctx.len = 0;
ctx.cdata = NULL;
ctx.userFunc = handle_new_lock_ctx;
ctx.userData = lock;
XML_SetUserData(parser, &ctx);
XML_SetElementHandler(parser, xml_start_tag,
xml_end_tag);
XML_SetCharacterDataHandler(parser, xml_cdata);
result = XML_Parse(parser, in_buffer.buf,
in_buffer.len, 1);
free(ctx.name);
if (result != XML_STATUS_OK) {
fprintf(stderr, "XML error: %s\n",
XML_ErrorString(
XML_GetErrorCode(parser)));
lock->timeout = -1;
}
XML_ParserFree(parser);
}
} else {
fprintf(stderr, "Unable to start LOCK request\n");
}
curl_slist_free_all(dav_headers);
strbuf_release(&out_buffer.buf);
strbuf_release(&in_buffer);
if (lock->token == NULL || lock->timeout <= 0) {
free(lock->token);
free(lock->owner);
free(url);
free(lock);
lock = NULL;
} else {
lock->url = url;
lock->start_time = time(NULL);
lock->next = repo->locks;
repo->locks = lock;
}
return lock;
}
static int unlock_remote(struct remote_lock *lock)
{
struct active_request_slot *slot;
struct slot_results results;
struct remote_lock *prev = repo->locks;
struct curl_slist *dav_headers;
int rc = 0;
dav_headers = get_dav_token_headers(lock, DAV_HEADER_LOCK);
slot = get_active_slot();
slot->results = &results;
curl_setup_http_get(slot->curl, lock->url, DAV_UNLOCK);
curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
if (start_active_slot(slot)) {
run_active_slot(slot);
if (results.curl_result == CURLE_OK)
rc = 1;
else
fprintf(stderr, "UNLOCK HTTP error %ld\n",
results.http_code);
} else {
fprintf(stderr, "Unable to start UNLOCK request\n");
}
curl_slist_free_all(dav_headers);
if (repo->locks == lock) {
repo->locks = lock->next;
} else {
while (prev && prev->next != lock)
prev = prev->next;
if (prev)
prev->next = prev->next->next;
}
free(lock->owner);
free(lock->url);
free(lock->token);
free(lock);
return rc;
}
static void remove_locks(void)
{
struct remote_lock *lock = repo->locks;
fprintf(stderr, "Removing remote locks...\n");
while (lock) {
struct remote_lock *next = lock->next;
unlock_remote(lock);
lock = next;
}
}
static void remove_locks_on_signal(int signo)
{
remove_locks();
sigchain_pop(signo);
raise(signo);
}
static void remote_ls(const char *path, int flags,
void (*userFunc)(struct remote_ls_ctx *ls),
void *userData);
static void process_ls_object(struct remote_ls_ctx *ls)
{
unsigned int *parent = (unsigned int *)ls->userData;
char *path = ls->dentry_name;
char *obj_hex;
if (!strcmp(ls->path, ls->dentry_name) && (ls->flags & IS_DIR)) {
remote_dir_exists[*parent] = 1;
return;
}
if (strlen(path) != 49)
return;
path += 8;
obj_hex = xmalloc(strlen(path));
/* NB: path is not null-terminated, can not use strlcpy here */
memcpy(obj_hex, path, 2);
strcpy(obj_hex + 2, path + 3);
one_remote_object(obj_hex);
free(obj_hex);
}
static void process_ls_ref(struct remote_ls_ctx *ls)
{
if (!strcmp(ls->path, ls->dentry_name) && (ls->dentry_flags & IS_DIR)) {
fprintf(stderr, " %s\n", ls->dentry_name);
return;
}
if (!(ls->dentry_flags & IS_DIR))
one_remote_ref(ls->dentry_name);
}
static void handle_remote_ls_ctx(struct xml_ctx *ctx, int tag_closed)
{
struct remote_ls_ctx *ls = (struct remote_ls_ctx *)ctx->userData;
if (tag_closed) {
if (!strcmp(ctx->name, DAV_PROPFIND_RESP) && ls->dentry_name) {
if (ls->dentry_flags & IS_DIR) {
/* ensure collection names end with slash */
str_end_url_with_slash(ls->dentry_name, &ls->dentry_name);
if (ls->flags & PROCESS_DIRS) {
ls->userFunc(ls);
}
if (strcmp(ls->dentry_name, ls->path) &&
ls->flags & RECURSIVE) {
remote_ls(ls->dentry_name,
ls->flags,
ls->userFunc,
ls->userData);
}
} else if (ls->flags & PROCESS_FILES) {
ls->userFunc(ls);
}
} else if (!strcmp(ctx->name, DAV_PROPFIND_NAME) && ctx->cdata) {
char *path = ctx->cdata;
if (*ctx->cdata == 'h') {
path = strstr(path, "//");
if (path) {
path = strchr(path+2, '/');
}
}
if (path) {
const char *url = repo->url;
if (repo->path)
url = repo->path;
if (strncmp(path, url, repo->path_len))
error("Parsed path '%s' does not match url: '%s'",
path, url);
else {
path += repo->path_len;
ls->dentry_name = xstrdup(path);
}
}
} else if (!strcmp(ctx->name, DAV_PROPFIND_COLLECTION)) {
ls->dentry_flags |= IS_DIR;
}
} else if (!strcmp(ctx->name, DAV_PROPFIND_RESP)) {
free(ls->dentry_name);
ls->dentry_name = NULL;
ls->dentry_flags = 0;
}
}
/*
* NEEDSWORK: remote_ls() ignores info/refs on the remote side. But it
* should _only_ heed the information from that file, instead of trying to
* determine the refs from the remote file system (badly: it does not even
* know about packed-refs).
*/
static void remote_ls(const char *path, int flags,
void (*userFunc)(struct remote_ls_ctx *ls),
void *userData)
{
char *url = xmalloc(strlen(repo->url) + strlen(path) + 1);
struct active_request_slot *slot;
struct slot_results results;
struct strbuf in_buffer = STRBUF_INIT;
struct buffer out_buffer = { STRBUF_INIT, 0 };
struct curl_slist *dav_headers = NULL;
struct xml_ctx ctx;
struct remote_ls_ctx ls;
ls.flags = flags;
ls.path = xstrdup(path);
ls.dentry_name = NULL;
ls.dentry_flags = 0;
ls.userData = userData;
ls.userFunc = userFunc;
sprintf(url, "%s%s", repo->url, path);
strbuf_addf(&out_buffer.buf, PROPFIND_ALL_REQUEST);
dav_headers = curl_slist_append(dav_headers, "Depth: 1");
dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
slot = get_active_slot();
slot->results = &results;
curl_setup_http(slot->curl, url, DAV_PROPFIND,
&out_buffer, fwrite_buffer);
curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
if (start_active_slot(slot)) {
run_active_slot(slot);
if (results.curl_result == CURLE_OK) {
XML_Parser parser = XML_ParserCreate(NULL);
enum XML_Status result;
ctx.name = xcalloc(10, 1);
ctx.len = 0;
ctx.cdata = NULL;
ctx.userFunc = handle_remote_ls_ctx;
ctx.userData = &ls;
XML_SetUserData(parser, &ctx);
XML_SetElementHandler(parser, xml_start_tag,
xml_end_tag);
XML_SetCharacterDataHandler(parser, xml_cdata);
result = XML_Parse(parser, in_buffer.buf,
in_buffer.len, 1);
free(ctx.name);
if (result != XML_STATUS_OK) {
fprintf(stderr, "XML error: %s\n",
XML_ErrorString(
XML_GetErrorCode(parser)));
}
XML_ParserFree(parser);
}
} else {
fprintf(stderr, "Unable to start PROPFIND request\n");
}
free(ls.path);
free(url);
strbuf_release(&out_buffer.buf);
strbuf_release(&in_buffer);
curl_slist_free_all(dav_headers);
}
static void get_remote_object_list(unsigned char parent)
{
char path[] = "objects/XX/";
static const char hex[] = "0123456789abcdef";
unsigned int val = parent;
path[8] = hex[val >> 4];
path[9] = hex[val & 0xf];
remote_dir_exists[val] = 0;
remote_ls(path, (PROCESS_FILES | PROCESS_DIRS),
process_ls_object, &val);
}
static int locking_available(void)
{
struct active_request_slot *slot;
struct slot_results results;
struct strbuf in_buffer = STRBUF_INIT;
struct buffer out_buffer = { STRBUF_INIT, 0 };
struct curl_slist *dav_headers = NULL;
struct xml_ctx ctx;
int lock_flags = 0;
char *escaped;
escaped = xml_entities(repo->url);
strbuf_addf(&out_buffer.buf, PROPFIND_SUPPORTEDLOCK_REQUEST, escaped);
free(escaped);
dav_headers = curl_slist_append(dav_headers, "Depth: 0");
dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
slot = get_active_slot();
slot->results = &results;
curl_setup_http(slot->curl, repo->url, DAV_PROPFIND,
&out_buffer, fwrite_buffer);
curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
if (start_active_slot(slot)) {
run_active_slot(slot);
if (results.curl_result == CURLE_OK) {
XML_Parser parser = XML_ParserCreate(NULL);
enum XML_Status result;
ctx.name = xcalloc(10, 1);
ctx.len = 0;
ctx.cdata = NULL;
ctx.userFunc = handle_lockprop_ctx;
ctx.userData = &lock_flags;
XML_SetUserData(parser, &ctx);
XML_SetElementHandler(parser, xml_start_tag,
xml_end_tag);
result = XML_Parse(parser, in_buffer.buf,
in_buffer.len, 1);
free(ctx.name);
if (result != XML_STATUS_OK) {
fprintf(stderr, "XML error: %s\n",
XML_ErrorString(
XML_GetErrorCode(parser)));
lock_flags = 0;
}
XML_ParserFree(parser);
if (!lock_flags)
error("no DAV locking support on %s",
repo->url);
} else {
error("Cannot access URL %s, return code %d",
repo->url, results.curl_result);
lock_flags = 0;
}
} else {
error("Unable to start PROPFIND request on %s", repo->url);
}
strbuf_release(&out_buffer.buf);
strbuf_release(&in_buffer);
curl_slist_free_all(dav_headers);
return lock_flags;
}
static struct object_list **add_one_object(struct object *obj, struct object_list **p)
{
struct object_list *entry = xmalloc(sizeof(struct object_list));
entry->item = obj;
entry->next = *p;
*p = entry;
return &entry->next;
}
static struct object_list **process_blob(struct blob *blob,
struct object_list **p,
struct name_path *path,
const char *name)
{
struct object *obj = &blob->object;
obj->flags |= LOCAL;
if (obj->flags & (UNINTERESTING | SEEN))
return p;
obj->flags |= SEEN;
return add_one_object(obj, p);
}
static struct object_list **process_tree(struct tree *tree,
struct object_list **p,
struct name_path *path,
const char *name)
{
struct object *obj = &tree->object;
struct tree_desc desc;
struct name_entry entry;
struct name_path me;
obj->flags |= LOCAL;
if (obj->flags & (UNINTERESTING | SEEN))
return p;
if (parse_tree(tree) < 0)
die("bad tree object %s", sha1_to_hex(obj->sha1));
obj->flags |= SEEN;
name = xstrdup(name);
p = add_one_object(obj, p);
me.up = path;
me.elem = name;
me.elem_len = strlen(name);
init_tree_desc(&desc, tree->buffer, tree->size);
while (tree_entry(&desc, &entry))
switch (object_type(entry.mode)) {
case OBJ_TREE:
p = process_tree(lookup_tree(entry.sha1), p, &me, name);
break;
case OBJ_BLOB:
p = process_blob(lookup_blob(entry.sha1), p, &me, name);
break;
default:
/* Subproject commit - not in this repository */
break;
}
free(tree->buffer);
tree->buffer = NULL;
return p;
}
static int get_delta(struct rev_info *revs, struct remote_lock *lock)
{
int i;
struct commit *commit;
struct object_list **p = &objects;
int count = 0;
while ((commit = get_revision(revs)) != NULL) {
p = process_tree(commit->tree, p, NULL, "");
commit->object.flags |= LOCAL;
if (!(commit->object.flags & UNINTERESTING))
count += add_send_request(&commit->object, lock);
}
for (i = 0; i < revs->pending.nr; i++) {
struct object_array_entry *entry = revs->pending.objects + i;
struct object *obj = entry->item;
const char *name = entry->name;
if (obj->flags & (UNINTERESTING | SEEN))
continue;
if (obj->type == OBJ_TAG) {
obj->flags |= SEEN;
p = add_one_object(obj, p);
continue;
}
if (obj->type == OBJ_TREE) {
p = process_tree((struct tree *)obj, p, NULL, name);
continue;
}
if (obj->type == OBJ_BLOB) {
p = process_blob((struct blob *)obj, p, NULL, name);
continue;
}
die("unknown pending object %s (%s)", sha1_to_hex(obj->sha1), name);
}
while (objects) {
if (!(objects->item->flags & UNINTERESTING))
count += add_send_request(objects->item, lock);
objects = objects->next;
}
return count;
}
static int update_remote(unsigned char *sha1, struct remote_lock *lock)
{
struct active_request_slot *slot;
struct slot_results results;
struct buffer out_buffer = { STRBUF_INIT, 0 };
struct curl_slist *dav_headers;
dav_headers = get_dav_token_headers(lock, DAV_HEADER_IF);
strbuf_addf(&out_buffer.buf, "%s\n", sha1_to_hex(sha1));
slot = get_active_slot();
slot->results = &results;
curl_setup_http(slot->curl, lock->url, DAV_PUT,
&out_buffer, fwrite_null);
curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
if (start_active_slot(slot)) {
run_active_slot(slot);
strbuf_release(&out_buffer.buf);
if (results.curl_result != CURLE_OK) {
fprintf(stderr,
"PUT error: curl result=%d, HTTP code=%ld\n",
results.curl_result, results.http_code);
/* We should attempt recovery? */
return 0;
}
} else {
strbuf_release(&out_buffer.buf);
fprintf(stderr, "Unable to start PUT request\n");
return 0;
}
return 1;
}
static struct ref *remote_refs;
static void one_remote_ref(const char *refname)
{
struct ref *ref;
struct object *obj;
ref = alloc_ref(refname);
if (http_fetch_ref(repo->url, ref) != 0) {
fprintf(stderr,
"Unable to fetch ref %s from %s\n",
refname, repo->url);
free(ref);
return;
}
/*
* Fetch a copy of the object if it doesn't exist locally - it
* may be required for updating server info later.
*/
if (repo->can_update_info_refs && !has_sha1_file(ref->old_sha1)) {
obj = lookup_unknown_object(ref->old_sha1);
if (obj) {
fprintf(stderr, " fetch %s for %s\n",
sha1_to_hex(ref->old_sha1), refname);
add_fetch_request(obj);
}
}
ref->next = remote_refs;
remote_refs = ref;
}
static void get_dav_remote_heads(void)
{
remote_ls("refs/", (PROCESS_FILES | PROCESS_DIRS | RECURSIVE), process_ls_ref, NULL);
}
static void add_remote_info_ref(struct remote_ls_ctx *ls)
{
struct strbuf *buf = (struct strbuf *)ls->userData;
struct object *o;
int len;
char *ref_info;
struct ref *ref;
ref = alloc_ref(ls->dentry_name);
if (http_fetch_ref(repo->url, ref) != 0) {
fprintf(stderr,
"Unable to fetch ref %s from %s\n",
ls->dentry_name, repo->url);
aborted = 1;
free(ref);
return;
}
o = parse_object(ref->old_sha1);
if (!o) {
fprintf(stderr,
"Unable to parse object %s for remote ref %s\n",
sha1_to_hex(ref->old_sha1), ls->dentry_name);
aborted = 1;
free(ref);
return;
}
len = strlen(ls->dentry_name) + 42;
ref_info = xcalloc(len + 1, 1);
sprintf(ref_info, "%s %s\n",
sha1_to_hex(ref->old_sha1), ls->dentry_name);
fwrite_buffer(ref_info, 1, len, buf);
free(ref_info);
if (o->type == OBJ_TAG) {
o = deref_tag(o, ls->dentry_name, 0);
if (o) {
len = strlen(ls->dentry_name) + 45;
ref_info = xcalloc(len + 1, 1);
sprintf(ref_info, "%s %s^{}\n",
sha1_to_hex(o->sha1), ls->dentry_name);
fwrite_buffer(ref_info, 1, len, buf);
free(ref_info);
}
}
free(ref);
}
static void update_remote_info_refs(struct remote_lock *lock)
{
struct buffer buffer = { STRBUF_INIT, 0 };
struct active_request_slot *slot;
struct slot_results results;
struct curl_slist *dav_headers;
remote_ls("refs/", (PROCESS_FILES | RECURSIVE),
add_remote_info_ref, &buffer.buf);
if (!aborted) {
dav_headers = get_dav_token_headers(lock, DAV_HEADER_IF);
slot = get_active_slot();
slot->results = &results;
curl_setup_http(slot->curl, lock->url, DAV_PUT,
&buffer, fwrite_null);
curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
if (start_active_slot(slot)) {
run_active_slot(slot);
if (results.curl_result != CURLE_OK) {
fprintf(stderr,
"PUT error: curl result=%d, HTTP code=%ld\n",
results.curl_result, results.http_code);
}
}
}
strbuf_release(&buffer.buf);
}
static int remote_exists(const char *path)
{
char *url = xmalloc(strlen(repo->url) + strlen(path) + 1);
int ret;
sprintf(url, "%s%s", repo->url, path);
switch (http_get_strbuf(url, NULL, 0)) {
case HTTP_OK:
ret = 1;
break;
case HTTP_MISSING_TARGET:
ret = 0;
break;
case HTTP_ERROR:
http_error(url, HTTP_ERROR);
default:
ret = -1;
}
free(url);
return ret;
}
static void fetch_symref(const char *path, char **symref, unsigned char *sha1)
{
char *url;
struct strbuf buffer = STRBUF_INIT;
url = xmalloc(strlen(repo->url) + strlen(path) + 1);
sprintf(url, "%s%s", repo->url, path);
if (http_get_strbuf(url, &buffer, 0) != HTTP_OK)
die("Couldn't get %s for remote symref\n%s", url,
curl_errorstr);
free(url);
free(*symref);
*symref = NULL;
hashclr(sha1);
if (buffer.len == 0)
return;
/* If it's a symref, set the refname; otherwise try for a sha1 */
if (!prefixcmp((char *)buffer.buf, "ref: ")) {
*symref = xmemdupz((char *)buffer.buf + 5, buffer.len - 6);
} else {
get_sha1_hex(buffer.buf, sha1);
}
strbuf_release(&buffer);
}
static int verify_merge_base(unsigned char *head_sha1, struct ref *remote)
{
struct commit *head = lookup_commit_or_die(head_sha1, "HEAD");
struct commit *branch = lookup_commit_or_die(remote->old_sha1, remote->name);
return in_merge_bases(branch, head);
}
static int delete_remote_branch(const char *pattern, int force)
{
struct ref *refs = remote_refs;
struct ref *remote_ref = NULL;
unsigned char head_sha1[20];
char *symref = NULL;
int match;
int patlen = strlen(pattern);
int i;
struct active_request_slot *slot;
struct slot_results results;
char *url;
/* Find the remote branch(es) matching the specified branch name */
for (match = 0; refs; refs = refs->next) {
char *name = refs->name;
int namelen = strlen(name);
if (namelen < patlen ||
memcmp(name + namelen - patlen, pattern, patlen))
continue;
if (namelen != patlen && name[namelen - patlen - 1] != '/')
continue;
match++;
remote_ref = refs;
}
if (match == 0)
return error("No remote branch matches %s", pattern);
if (match != 1)
return error("More than one remote branch matches %s",
pattern);
/*
* Remote HEAD must be a symref (not exactly foolproof; a remote
* symlink to a symref will look like a symref)
*/
fetch_symref("HEAD", &symref, head_sha1);
if (!symref)
return error("Remote HEAD is not a symref");
/* Remote branch must not be the remote HEAD */
for (i = 0; symref && i < MAXDEPTH; i++) {
if (!strcmp(remote_ref->name, symref))
return error("Remote branch %s is the current HEAD",
remote_ref->name);
fetch_symref(symref, &symref, head_sha1);
}
/* Run extra sanity checks if delete is not forced */
if (!force) {
/* Remote HEAD must resolve to a known object */
if (symref)
return error("Remote HEAD symrefs too deep");
if (is_null_sha1(head_sha1))
return error("Unable to resolve remote HEAD");
if (!has_sha1_file(head_sha1))
return error("Remote HEAD resolves to object %s\nwhich does not exist locally, perhaps you need to fetch?", sha1_to_hex(head_sha1));
/* Remote branch must resolve to a known object */
if (is_null_sha1(remote_ref->old_sha1))
return error("Unable to resolve remote branch %s",
remote_ref->name);
if (!has_sha1_file(remote_ref->old_sha1))
return error("Remote branch %s resolves to object %s\nwhich does not exist locally, perhaps you need to fetch?", remote_ref->name, sha1_to_hex(remote_ref->old_sha1));
/* Remote branch must be an ancestor of remote HEAD */
if (!verify_merge_base(head_sha1, remote_ref)) {
return error("The branch '%s' is not an ancestor "
"of your current HEAD.\n"
"If you are sure you want to delete it,"
" run:\n\t'git http-push -D %s %s'",
remote_ref->name, repo->url, pattern);
}
}
/* Send delete request */
fprintf(stderr, "Removing remote branch '%s'\n", remote_ref->name);
if (dry_run)
return 0;
url = xmalloc(strlen(repo->url) + strlen(remote_ref->name) + 1);
sprintf(url, "%s%s", repo->url, remote_ref->name);
slot = get_active_slot();
slot->results = &results;
curl_setup_http_get(slot->curl, url, DAV_DELETE);
if (start_active_slot(slot)) {
run_active_slot(slot);
free(url);
if (results.curl_result != CURLE_OK)
return error("DELETE request failed (%d/%ld)",
results.curl_result, results.http_code);
} else {
free(url);
return error("Unable to start DELETE request");
}
return 0;
}
static void run_request_queue(void)
{
#ifdef USE_CURL_MULTI
is_running_queue = 1;
fill_active_slots();
add_fill_function(NULL, fill_active_slot);
#endif
do {
finish_all_active_slots();
#ifdef USE_CURL_MULTI
fill_active_slots();
#endif
} while (request_queue_head && !aborted);
#ifdef USE_CURL_MULTI
is_running_queue = 0;
#endif
}
int main(int argc, char **argv)
{
struct transfer_request *request;
struct transfer_request *next_request;
int nr_refspec = 0;
char **refspec = NULL;
struct remote_lock *ref_lock = NULL;
struct remote_lock *info_ref_lock = NULL;
struct rev_info revs;
int delete_branch = 0;
int force_delete = 0;
int objects_to_send;
int rc = 0;
int i;
int new_refs;
struct ref *ref, *local_refs;
git_setup_gettext();
git_extract_argv0_path(argv[0]);
repo = xcalloc(sizeof(*repo), 1);
argv++;
for (i = 1; i < argc; i++, argv++) {
char *arg = *argv;
if (*arg == '-') {
if (!strcmp(arg, "--all")) {
push_all = MATCH_REFS_ALL;
continue;
}
if (!strcmp(arg, "--force")) {
force_all = 1;
continue;
}
if (!strcmp(arg, "--dry-run")) {
dry_run = 1;
continue;
}
if (!strcmp(arg, "--helper-status")) {
helper_status = 1;
continue;
}
if (!strcmp(arg, "--verbose")) {
push_verbosely = 1;
http_is_verbose = 1;
continue;
}
if (!strcmp(arg, "-d")) {
delete_branch = 1;
continue;
}
if (!strcmp(arg, "-D")) {
delete_branch = 1;
force_delete = 1;
continue;
}
if (!strcmp(arg, "-h"))
usage(http_push_usage);
}
if (!repo->url) {
char *path = strstr(arg, "//");
str_end_url_with_slash(arg, &repo->url);
repo->path_len = strlen(repo->url);
if (path) {
repo->path = strchr(path+2, '/');
if (repo->path)
repo->path_len = strlen(repo->path);
}
continue;
}
refspec = argv;
nr_refspec = argc - i;
break;
}
#ifndef USE_CURL_MULTI
die("git-push is not available for http/https repository when not compiled with USE_CURL_MULTI");
#endif
if (!repo->url)
usage(http_push_usage);
if (delete_branch && nr_refspec != 1)
die("You must specify only one branch name when deleting a remote branch");
setup_git_directory();
memset(remote_dir_exists, -1, 256);
http_init(NULL, repo->url, 1);
#ifdef USE_CURL_MULTI
is_running_queue = 0;
#endif
/* Verify DAV compliance/lock support */
if (!locking_available()) {
rc = 1;
goto cleanup;
}
sigchain_push_common(remove_locks_on_signal);
/* Check whether the remote has server info files */
repo->can_update_info_refs = 0;
repo->has_info_refs = remote_exists("info/refs");
repo->has_info_packs = remote_exists("objects/info/packs");
if (repo->has_info_refs) {
info_ref_lock = lock_remote("info/refs", LOCK_TIME);
if (info_ref_lock)
repo->can_update_info_refs = 1;
else {
error("cannot lock existing info/refs");
rc = 1;
goto cleanup;
}
}
if (repo->has_info_packs)
fetch_indices();
/* Get a list of all local and remote heads to validate refspecs */
local_refs = get_local_heads();
fprintf(stderr, "Fetching remote heads...\n");
get_dav_remote_heads();
run_request_queue();
/* Remove a remote branch if -d or -D was specified */
if (delete_branch) {
if (delete_remote_branch(refspec[0], force_delete) == -1) {
fprintf(stderr, "Unable to delete remote branch %s\n",
refspec[0]);
if (helper_status)
printf("error %s cannot remove\n", refspec[0]);
}
goto cleanup;
}
/* match them up */
if (match_push_refs(local_refs, &remote_refs,
nr_refspec, (const char **) refspec, push_all)) {
rc = -1;
goto cleanup;
}
if (!remote_refs) {
fprintf(stderr, "No refs in common and none specified; doing nothing.\n");
if (helper_status)
printf("error null no match\n");
rc = 0;
goto cleanup;
}
new_refs = 0;
for (ref = remote_refs; ref; ref = ref->next) {
char old_hex[60], *new_hex;
const char *commit_argv[5];
int commit_argc;
char *new_sha1_hex, *old_sha1_hex;
if (!ref->peer_ref)
continue;
if (is_null_sha1(ref->peer_ref->new_sha1)) {
if (delete_remote_branch(ref->name, 1) == -1) {
error("Could not remove %s", ref->name);
if (helper_status)
printf("error %s cannot remove\n", ref->name);
rc = -4;
}
else if (helper_status)
printf("ok %s\n", ref->name);
new_refs++;
continue;
}
if (!hashcmp(ref->old_sha1, ref->peer_ref->new_sha1)) {
if (push_verbosely)
fprintf(stderr, "'%s': up-to-date\n", ref->name);
if (helper_status)
printf("ok %s up to date\n", ref->name);
continue;
}
if (!force_all &&
!is_null_sha1(ref->old_sha1) &&
!ref->force) {
if (!has_sha1_file(ref->old_sha1) ||
!ref_newer(ref->peer_ref->new_sha1,
ref->old_sha1)) {
/*
* We do not have the remote ref, or
* we know that the remote ref is not
* an ancestor of what we are trying to
* push. Either way this can be losing
* commits at the remote end and likely
* we were not up to date to begin with.
*/
error("remote '%s' is not an ancestor of\n"
"local '%s'.\n"
"Maybe you are not up-to-date and "
"need to pull first?",
ref->name,
ref->peer_ref->name);
if (helper_status)
printf("error %s non-fast forward\n", ref->name);
rc = -2;
continue;
}
}
hashcpy(ref->new_sha1, ref->peer_ref->new_sha1);
new_refs++;
strcpy(old_hex, sha1_to_hex(ref->old_sha1));
new_hex = sha1_to_hex(ref->new_sha1);
fprintf(stderr, "updating '%s'", ref->name);
if (strcmp(ref->name, ref->peer_ref->name))
fprintf(stderr, " using '%s'", ref->peer_ref->name);
fprintf(stderr, "\n from %s\n to %s\n", old_hex, new_hex);
if (dry_run) {
if (helper_status)
printf("ok %s\n", ref->name);
continue;
}
/* Lock remote branch ref */
ref_lock = lock_remote(ref->name, LOCK_TIME);
if (ref_lock == NULL) {
fprintf(stderr, "Unable to lock remote branch %s\n",
ref->name);
if (helper_status)
printf("error %s lock error\n", ref->name);
rc = 1;
continue;
}
/* Set up revision info for this refspec */
commit_argc = 3;
new_sha1_hex = xstrdup(sha1_to_hex(ref->new_sha1));
old_sha1_hex = NULL;
commit_argv[1] = "--objects";
commit_argv[2] = new_sha1_hex;
if (!push_all && !is_null_sha1(ref->old_sha1)) {
old_sha1_hex = xmalloc(42);
sprintf(old_sha1_hex, "^%s",
sha1_to_hex(ref->old_sha1));
commit_argv[3] = old_sha1_hex;
commit_argc++;
}
commit_argv[commit_argc] = NULL;
init_revisions(&revs, setup_git_directory());
setup_revisions(commit_argc, commit_argv, &revs, NULL);
revs.edge_hint = 0; /* just in case */
free(new_sha1_hex);
if (old_sha1_hex) {
free(old_sha1_hex);
commit_argv[1] = NULL;
}
/* Generate a list of objects that need to be pushed */
pushing = 0;
if (prepare_revision_walk(&revs))
die("revision walk setup failed");
mark_edges_uninteresting(revs.commits, &revs, NULL);
objects_to_send = get_delta(&revs, ref_lock);
finish_all_active_slots();
/* Push missing objects to remote, this would be a
convenient time to pack them first if appropriate. */
pushing = 1;
if (objects_to_send)
fprintf(stderr, " sending %d objects\n",
objects_to_send);
run_request_queue();
/* Update the remote branch if all went well */
if (aborted || !update_remote(ref->new_sha1, ref_lock))
rc = 1;
if (!rc)
fprintf(stderr, " done\n");
if (helper_status)
printf("%s %s\n", !rc ? "ok" : "error", ref->name);
unlock_remote(ref_lock);
check_locks();
}
/* Update remote server info if appropriate */
if (repo->has_info_refs && new_refs) {
if (info_ref_lock && repo->can_update_info_refs) {
fprintf(stderr, "Updating remote server info\n");
if (!dry_run)
update_remote_info_refs(info_ref_lock);
} else {
fprintf(stderr, "Unable to update server info\n");
}
}
cleanup:
if (info_ref_lock)
unlock_remote(info_ref_lock);
free(repo);
http_cleanup();
request = request_queue_head;
while (request != NULL) {
next_request = request->next;
release_request(request);
request = next_request;
}
return rc;
}
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