summaryrefslogtreecommitdiffstats
path: root/http-push.c
diff options
context:
space:
mode:
authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 14:47:53 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 14:47:53 +0000
commitc8bae7493d2f2910b57f13ded012e86bdcfb0532 (patch)
tree24e09d9f84dec336720cf393e156089ca2835791 /http-push.c
parentInitial commit. (diff)
downloadgit-c8bae7493d2f2910b57f13ded012e86bdcfb0532.tar.xz
git-c8bae7493d2f2910b57f13ded012e86bdcfb0532.zip
Adding upstream version 1:2.39.2.upstream/1%2.39.2upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'http-push.c')
-rw-r--r--http-push.c1973
1 files changed, 1973 insertions, 0 deletions
diff --git a/http-push.c b/http-push.c
new file mode 100644
index 0000000..7f71316
--- /dev/null
+++ b/http-push.c
@@ -0,0 +1,1973 @@
+#include "cache.h"
+#include "repository.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 "strvec.h"
+#include "packfile.h"
+#include "object-store.h"
+#include "commit-reach.h"
+
+#ifdef EXPAT_NEEDS_XMLPARSE_H
+#include <xmlparse.h>
+#else
+#include <expat.h>
+#endif
+
+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
+
+/* Remember to update object flag allocation in object.h */
+#define LOCAL (1u<<11)
+#define REMOTE (1u<<12)
+#define FETCHING (1u<<13)
+#define PUSHING (1u<<14)
+
+/* 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;
+ struct packed_git *target;
+ 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[GIT_MAX_HEXSZ + 1];
+ 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;
+ strbuf_addstr_xml_quoted(&buf, 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_UPLOAD, 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);
+ curl_easy_setopt(curl, CURLOPT_SEEKFUNCTION, seek_buffer);
+ curl_easy_setopt(curl, CURLOPT_SEEKDATA, buffer);
+ 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 = http_copy_default_headers();
+
+ 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);
+}
+
+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->oid);
+ if (!obj_req) {
+ 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 = oid_to_hex(&request->obj->oid);
+ 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_AND_NULL(request->url);
+ }
+}
+
+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->oid.hash, repo->packs);
+ if (!target) {
+ fprintf(stderr, "Unable to fetch %s, will not be able to update server info refs\n", oid_to_hex(&request->obj->oid));
+ repo->can_update_info_refs = 0;
+ release_request(request);
+ return;
+ }
+ close_pack_index(target);
+ request->target = target;
+
+ fprintf(stderr, "Fetching pack %s\n",
+ hash_to_hex(target->hash));
+ fprintf(stderr, " which contains %s\n", oid_to_hex(&request->obj->oid));
+
+ preq = new_http_pack_request(target->hash, repo->url);
+ if (!preq) {
+ repo->can_update_info_refs = 0;
+ return;
+ }
+
+ /* 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 = oid_to_hex(&request->obj->oid);
+ 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_object_file(&request->obj->oid, &type, &len);
+ hdrlen = format_object_header(hdr, sizeof(hdr), type, len);
+
+ /* Set it up */
+ 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, the_hash_algo->hexsz + 1);
+ 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_AND_NULL(request->url);
+ }
+}
+
+static void start_move(struct transfer_request *request)
+{
+ struct active_request_slot *slot;
+ struct curl_slist *dav_headers = http_copy_default_headers();
+
+ 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_AND_NULL(request->url);
+ }
+}
+
+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 && entry->next != request)
+ entry = entry->next;
+ if (entry)
+ entry->next = request->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)
+ curl_slist_free_all(request->headers);
+
+ /* URL is reused for MOVE after PUT and used during FETCH */
+ if (request->state != RUN_PUT && request->state != RUN_FETCH_PACKED) {
+ FREE_AND_NULL(request->url);
+ }
+
+ if (request->state == RUN_MKCOL) {
+ if (request->curl_result == CURLE_OK ||
+ request->http_code == 405) {
+ remote_dir_exists[request->obj->oid.hash[0]] = 1;
+ start_put(request);
+ } else {
+ fprintf(stderr, "MKCOL %s failed, aborting (%d/%ld)\n",
+ oid_to_hex(&request->obj->oid),
+ 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",
+ oid_to_hex(&request->obj->oid),
+ 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",
+ oid_to_hex(&request->obj->oid));
+ request->obj->flags |= REMOTE;
+ release_request(request);
+ } else {
+ fprintf(stderr, "MOVE %s failed, aborting (%d/%ld)\n",
+ oid_to_hex(&request->obj->oid),
+ 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;
+ else
+ http_install_packfile(request->target, &repo->packs);
+ release_request(request);
+ }
+}
+
+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->oid.hash[0]] == 1) {
+ start_put(request);
+ } else {
+ start_mkcol(request);
+ }
+ return 1;
+ }
+ }
+ return 0;
+}
+
+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->oid.hash[0]] == -1)
+ get_remote_object_list(obj->oid.hash[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;
+
+ fill_active_slots();
+ step_active_slots();
+}
+
+static int add_send_request(struct object *obj, struct remote_lock *lock)
+{
+ struct transfer_request *request;
+ 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->oid.hash[0]] == -1)
+ get_remote_object_list(obj->oid.hash[0]);
+ if (obj->flags & (REMOTE | PUSHING))
+ return 0;
+ target = find_sha1_pack(obj->oid.hash, 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;
+
+ fill_active_slots();
+ step_active_slots();
+
+ 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 struct object_id *oid)
+{
+ struct object *obj;
+
+ obj = lookup_object(the_repository, oid);
+ if (!obj)
+ obj = parse_object(the_repository, oid);
+
+ /* 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_hash_ctx hash_ctx;
+ unsigned char lock_token_hash[GIT_MAX_RAWSZ];
+
+ if (tag_closed && ctx->cdata) {
+ if (!strcmp(ctx->name, DAV_ACTIVELOCK_OWNER)) {
+ lock->owner = xstrdup(ctx->cdata);
+ } else if (!strcmp(ctx->name, DAV_ACTIVELOCK_TIMEOUT)) {
+ const char *arg;
+ if (skip_prefix(ctx->cdata, "Second-", &arg))
+ lock->timeout = strtol(arg, NULL, 10);
+ } else if (!strcmp(ctx->name, DAV_ACTIVELOCK_TOKEN)) {
+ lock->token = xstrdup(ctx->cdata);
+
+ the_hash_algo->init_fn(&hash_ctx);
+ the_hash_algo->update_fn(&hash_ctx, lock->token, strlen(lock->token));
+ the_hash_algo->final_fn(lock_token_hash, &hash_ctx);
+
+ lock->tmpfile_suffix[0] = '_';
+ memcpy(lock->tmpfile_suffix + 1, hash_to_hex(lock_token_hash), the_hash_algo->hexsz);
+ }
+ }
+}
+
+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 old_namelen, new_len;
+
+ if (!c)
+ c = name;
+ else
+ c++;
+
+ old_namelen = strlen(ctx->name);
+ new_len = old_namelen + strlen(c) + 2;
+
+ if (new_len > ctx->len) {
+ ctx->name = xrealloc(ctx->name, new_len);
+ ctx->len = new_len;
+ }
+ xsnprintf(ctx->name + old_namelen, ctx->len - old_namelen, ".%s", c);
+
+ FREE_AND_NULL(ctx->cdata);
+
+ 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)
+ 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 = http_copy_default_headers();
+ struct xml_ctx ctx;
+ char *escaped;
+
+ url = xstrfmt("%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);
+
+ xsnprintf(timeout_header, sizeof(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_WRITEDATA, &in_buffer);
+
+ CALLOC_ARRAY(lock, 1);
+ 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,
+ "error: curl result=%d, HTTP code=%ld\n",
+ results.curl_result, results.http_code);
+ }
+ } 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_AND_NULL(lock);
+ } 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 = lock->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);
+
+/* extract hex from sharded "xx/x{38}" filename */
+static int get_oid_hex_from_objpath(const char *path, struct object_id *oid)
+{
+ oid->algo = hash_algo_by_ptr(the_hash_algo);
+
+ if (strlen(path) != the_hash_algo->hexsz + 1)
+ return -1;
+
+ if (hex_to_bytes(oid->hash, path, 1))
+ return -1;
+ path += 2;
+ path++; /* skip '/' */
+
+ return hex_to_bytes(oid->hash + 1, path, the_hash_algo->rawsz - 1);
+}
+
+static void process_ls_object(struct remote_ls_ctx *ls)
+{
+ unsigned int *parent = (unsigned int *)ls->userData;
+ const char *path = ls->dentry_name;
+ struct object_id oid;
+
+ if (!strcmp(ls->path, ls->dentry_name) && (ls->flags & IS_DIR)) {
+ remote_dir_exists[*parent] = 1;
+ return;
+ }
+
+ if (!skip_prefix(path, "objects/", &path) ||
+ get_oid_hex_from_objpath(path, &oid))
+ return;
+
+ one_remote_object(&oid);
+}
+
+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_AND_NULL(ls->dentry_name);
+ 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 = xstrfmt("%s%s", repo->url, path);
+ 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 = http_copy_default_headers();
+ 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;
+
+ strbuf_addstr(&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_WRITEDATA, &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 = http_copy_default_headers();
+ 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_WRITEDATA, &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 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 object *obj = &tree->object;
+ struct tree_desc desc;
+ struct name_entry entry;
+
+ obj->flags |= LOCAL;
+
+ if (obj->flags & (UNINTERESTING | SEEN))
+ return p;
+ if (parse_tree(tree) < 0)
+ die("bad tree object %s", oid_to_hex(&obj->oid));
+
+ obj->flags |= SEEN;
+ p = add_one_object(obj, p);
+
+ 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(the_repository, &entry.oid),
+ p);
+ break;
+ case OBJ_BLOB:
+ p = process_blob(lookup_blob(the_repository, &entry.oid),
+ p);
+ break;
+ default:
+ /* Subproject commit - not in this repository */
+ break;
+ }
+
+ free_tree_buffer(tree);
+ 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(get_commit_tree(commit), p);
+ 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);
+ continue;
+ }
+ if (obj->type == OBJ_BLOB) {
+ p = process_blob((struct blob *)obj, p);
+ continue;
+ }
+ die("unknown pending object %s (%s)", oid_to_hex(&obj->oid), name);
+ }
+
+ while (objects) {
+ if (!(objects->item->flags & UNINTERESTING))
+ count += add_send_request(objects->item, lock);
+ objects = objects->next;
+ }
+
+ return count;
+}
+
+static int update_remote(const struct object_id *oid, 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", oid_to_hex(oid));
+
+ 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_object_file(&ref->old_oid)) {
+ obj = lookup_unknown_object(the_repository, &ref->old_oid);
+ fprintf(stderr, " fetch %s for %s\n",
+ oid_to_hex(&ref->old_oid), 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;
+ 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(the_repository, &ref->old_oid);
+ if (!o) {
+ fprintf(stderr,
+ "Unable to parse object %s for remote ref %s\n",
+ oid_to_hex(&ref->old_oid), ls->dentry_name);
+ aborted = 1;
+ free(ref);
+ return;
+ }
+
+ strbuf_addf(buf, "%s\t%s\n",
+ oid_to_hex(&ref->old_oid), ls->dentry_name);
+
+ if (o->type == OBJ_TAG) {
+ o = deref_tag(the_repository, o, ls->dentry_name, 0);
+ if (o)
+ strbuf_addf(buf, "%s\t%s^{}\n",
+ oid_to_hex(&o->oid), ls->dentry_name);
+ }
+ 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 = xstrfmt("%s%s", repo->url, path);
+ int ret;
+
+
+ switch (http_get_strbuf(url, NULL, NULL)) {
+ case HTTP_OK:
+ ret = 1;
+ break;
+ case HTTP_MISSING_TARGET:
+ ret = 0;
+ break;
+ case HTTP_ERROR:
+ error("unable to access '%s': %s", url, curl_errorstr);
+ /* fallthrough */
+ default:
+ ret = -1;
+ }
+ free(url);
+ return ret;
+}
+
+static void fetch_symref(const char *path, char **symref, struct object_id *oid)
+{
+ char *url = xstrfmt("%s%s", repo->url, path);
+ struct strbuf buffer = STRBUF_INIT;
+ const char *name;
+
+ if (http_get_strbuf(url, &buffer, NULL) != HTTP_OK)
+ die("Couldn't get %s for remote symref\n%s", url,
+ curl_errorstr);
+ free(url);
+
+ FREE_AND_NULL(*symref);
+ oidclr(oid);
+
+ if (buffer.len == 0)
+ return;
+
+ /* Cut off trailing newline. */
+ strbuf_rtrim(&buffer);
+
+ /* If it's a symref, set the refname; otherwise try for a sha1 */
+ if (skip_prefix(buffer.buf, "ref: ", &name)) {
+ *symref = xmemdupz(name, buffer.len - (name - buffer.buf));
+ } else {
+ get_oid_hex(buffer.buf, oid);
+ }
+
+ strbuf_release(&buffer);
+}
+
+static int verify_merge_base(struct object_id *head_oid, struct ref *remote)
+{
+ struct commit *head = lookup_commit_or_die(head_oid, "HEAD");
+ struct commit *branch = lookup_commit_or_die(&remote->old_oid,
+ 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;
+ struct object_id head_oid;
+ 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_oid);
+ 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_oid);
+ }
+
+ /* 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_oid(&head_oid))
+ return error("Unable to resolve remote HEAD");
+ if (!has_object_file(&head_oid))
+ return error("Remote HEAD resolves to object %s\nwhich does not exist locally, perhaps you need to fetch?", oid_to_hex(&head_oid));
+
+ /* Remote branch must resolve to a known object */
+ if (is_null_oid(&remote_ref->old_oid))
+ return error("Unable to resolve remote branch %s",
+ remote_ref->name);
+ if (!has_object_file(&remote_ref->old_oid))
+ return error("Remote branch %s resolves to object %s\nwhich does not exist locally, perhaps you need to fetch?", remote_ref->name, oid_to_hex(&remote_ref->old_oid));
+
+ /* Remote branch must be an ancestor of remote HEAD */
+ if (!verify_merge_base(&head_oid, 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 = xstrfmt("%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)
+{
+ is_running_queue = 1;
+ fill_active_slots();
+ add_fill_function(NULL, fill_active_slot);
+ do {
+ finish_all_active_slots();
+ fill_active_slots();
+ } while (request_queue_head && !aborted);
+
+ is_running_queue = 0;
+}
+
+int cmd_main(int argc, const char **argv)
+{
+ struct transfer_request *request;
+ struct transfer_request *next_request;
+ struct refspec rs = REFSPEC_INIT_PUSH;
+ struct remote_lock *ref_lock = NULL;
+ struct remote_lock *info_ref_lock = NULL;
+ 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;
+
+ CALLOC_ARRAY(repo, 1);
+
+ argv++;
+ for (i = 1; i < argc; i++, argv++) {
+ const 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_appendn(&rs, argv, argc - i);
+ break;
+ }
+
+ if (!repo->url)
+ usage(http_push_usage);
+
+ if (delete_branch && rs.nr != 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);
+
+ is_running_queue = 0;
+
+ /* 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) {
+ const char *branch = rs.items[i].src;
+ if (delete_remote_branch(branch, force_delete) == -1) {
+ fprintf(stderr, "Unable to delete remote branch %s\n",
+ branch);
+ if (helper_status)
+ printf("error %s cannot remove\n", branch);
+ }
+ goto cleanup;
+ }
+
+ /* match them up */
+ if (match_push_refs(local_refs, &remote_refs, &rs, 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) {
+ struct rev_info revs;
+ struct strvec commit_argv = STRVEC_INIT;
+
+ if (!ref->peer_ref)
+ continue;
+
+ if (is_null_oid(&ref->peer_ref->new_oid)) {
+ 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 (oideq(&ref->old_oid, &ref->peer_ref->new_oid)) {
+ 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_oid(&ref->old_oid) &&
+ !ref->force) {
+ if (!has_object_file(&ref->old_oid) ||
+ !ref_newer(&ref->peer_ref->new_oid,
+ &ref->old_oid)) {
+ /*
+ * 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;
+ }
+ }
+ oidcpy(&ref->new_oid, &ref->peer_ref->new_oid);
+ new_refs++;
+
+ 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",
+ oid_to_hex(&ref->old_oid), oid_to_hex(&ref->new_oid));
+ 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) {
+ 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 */
+ strvec_push(&commit_argv, ""); /* ignored */
+ strvec_push(&commit_argv, "--objects");
+ strvec_push(&commit_argv, oid_to_hex(&ref->new_oid));
+ if (!push_all && !is_null_oid(&ref->old_oid))
+ strvec_pushf(&commit_argv, "^%s",
+ oid_to_hex(&ref->old_oid));
+ repo_init_revisions(the_repository, &revs, setup_git_directory());
+ setup_revisions(commit_argv.nr, commit_argv.v, &revs, NULL);
+ revs.edge_hint = 0; /* just in case */
+
+ /* 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, NULL, 0);
+ 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_oid, 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();
+ strvec_clear(&commit_argv);
+ release_revisions(&revs);
+ }
+
+ /* 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;
+}