mirror of
https://github.com/git/git
synced 2024-08-24 18:26:02 +00:00
![Jeff King](/assets/img/avatar_default.png)
Previously, we set all ref pushes to 'OK', and then marked them as errors if the remote reported so. This has the problem that if the remote dies or fails to report a ref, we just assume it was OK. Instead, we use a new non-OK state to indicate that we are expecting status (if the remote doesn't support the report-status feature, we fall back on the old behavior). Thus we can flag refs for which we expected a status, but got none (conversely, we now also print a warning for refs for which we get a status, but weren't expecting one). This also allows us to simplify the receive_status exit code, since each ref is individually marked with failure until we get a success response. We can just print the usual status table, so the user still gets a sense of what we were trying to do when the failure happened. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
626 lines
14 KiB
C
626 lines
14 KiB
C
#include "cache.h"
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#include "commit.h"
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#include "tag.h"
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#include "refs.h"
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#include "pkt-line.h"
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#include "run-command.h"
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#include "remote.h"
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#include "send-pack.h"
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static const char send_pack_usage[] =
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"git-send-pack [--all | --mirror] [--dry-run] [--force] [--receive-pack=<git-receive-pack>] [--verbose] [--thin] [<host>:]<directory> [<ref>...]\n"
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" --all and explicit <ref> specification are mutually exclusive.";
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static struct send_pack_args args = {
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/* .receivepack = */ "git-receive-pack",
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};
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/*
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* Make a pack stream and spit it out into file descriptor fd
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*/
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static int pack_objects(int fd, struct ref *refs)
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{
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/*
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* The child becomes pack-objects --revs; we feed
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* the revision parameters to it via its stdin and
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* let its stdout go back to the other end.
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*/
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const char *argv[] = {
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"pack-objects",
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"--all-progress",
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"--revs",
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"--stdout",
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NULL,
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NULL,
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};
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struct child_process po;
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if (args.use_thin_pack)
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argv[4] = "--thin";
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memset(&po, 0, sizeof(po));
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po.argv = argv;
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po.in = -1;
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po.out = fd;
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po.git_cmd = 1;
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if (start_command(&po))
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die("git-pack-objects failed (%s)", strerror(errno));
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/*
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* We feed the pack-objects we just spawned with revision
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* parameters by writing to the pipe.
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*/
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while (refs) {
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char buf[42];
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if (!is_null_sha1(refs->old_sha1) &&
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has_sha1_file(refs->old_sha1)) {
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memcpy(buf + 1, sha1_to_hex(refs->old_sha1), 40);
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buf[0] = '^';
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buf[41] = '\n';
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if (!write_or_whine(po.in, buf, 42,
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"send-pack: send refs"))
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break;
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}
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if (!is_null_sha1(refs->new_sha1)) {
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memcpy(buf, sha1_to_hex(refs->new_sha1), 40);
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buf[40] = '\n';
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if (!write_or_whine(po.in, buf, 41,
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"send-pack: send refs"))
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break;
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}
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refs = refs->next;
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}
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if (finish_command(&po))
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return error("pack-objects died with strange error");
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return 0;
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}
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static void unmark_and_free(struct commit_list *list, unsigned int mark)
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{
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while (list) {
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struct commit_list *temp = list;
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temp->item->object.flags &= ~mark;
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list = temp->next;
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free(temp);
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}
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}
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static int ref_newer(const unsigned char *new_sha1,
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const unsigned char *old_sha1)
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{
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struct object *o;
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struct commit *old, *new;
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struct commit_list *list, *used;
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int found = 0;
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/* Both new and old must be commit-ish and new is descendant of
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* old. Otherwise we require --force.
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*/
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o = deref_tag(parse_object(old_sha1), NULL, 0);
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if (!o || o->type != OBJ_COMMIT)
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return 0;
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old = (struct commit *) o;
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o = deref_tag(parse_object(new_sha1), NULL, 0);
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if (!o || o->type != OBJ_COMMIT)
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return 0;
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new = (struct commit *) o;
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if (parse_commit(new) < 0)
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return 0;
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used = list = NULL;
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commit_list_insert(new, &list);
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while (list) {
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new = pop_most_recent_commit(&list, 1);
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commit_list_insert(new, &used);
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if (new == old) {
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found = 1;
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break;
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}
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}
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unmark_and_free(list, 1);
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unmark_and_free(used, 1);
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return found;
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}
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static struct ref *local_refs, **local_tail;
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static struct ref *remote_refs, **remote_tail;
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static int one_local_ref(const char *refname, const unsigned char *sha1, int flag, void *cb_data)
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{
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struct ref *ref;
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int len = strlen(refname) + 1;
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ref = xcalloc(1, sizeof(*ref) + len);
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hashcpy(ref->new_sha1, sha1);
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memcpy(ref->name, refname, len);
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*local_tail = ref;
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local_tail = &ref->next;
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return 0;
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}
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static void get_local_heads(void)
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{
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local_tail = &local_refs;
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for_each_ref(one_local_ref, NULL);
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}
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static int receive_status(int in, struct ref *refs)
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{
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struct ref *hint;
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char line[1000];
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int ret = 0;
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int len = packet_read_line(in, line, sizeof(line));
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if (len < 10 || memcmp(line, "unpack ", 7))
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return error("did not receive remote status");
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if (memcmp(line, "unpack ok\n", 10)) {
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char *p = line + strlen(line) - 1;
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if (*p == '\n')
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*p = '\0';
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error("unpack failed: %s", line + 7);
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ret = -1;
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}
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hint = NULL;
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while (1) {
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char *refname;
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char *msg;
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len = packet_read_line(in, line, sizeof(line));
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if (!len)
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break;
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if (len < 3 ||
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(memcmp(line, "ok ", 3) && memcmp(line, "ng ", 3))) {
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fprintf(stderr, "protocol error: %s\n", line);
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ret = -1;
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break;
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}
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line[strlen(line)-1] = '\0';
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refname = line + 3;
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msg = strchr(refname, ' ');
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if (msg)
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*msg++ = '\0';
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/* first try searching at our hint, falling back to all refs */
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if (hint)
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hint = find_ref_by_name(hint, refname);
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if (!hint)
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hint = find_ref_by_name(refs, refname);
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if (!hint) {
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warning("remote reported status on unknown ref: %s",
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refname);
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continue;
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}
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if (hint->status != REF_STATUS_EXPECTING_REPORT) {
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warning("remote reported status on unexpected ref: %s",
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refname);
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continue;
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}
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if (line[0] == 'o' && line[1] == 'k')
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hint->status = REF_STATUS_OK;
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else {
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hint->status = REF_STATUS_REMOTE_REJECT;
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ret = -1;
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}
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if (msg)
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hint->remote_status = xstrdup(msg);
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/* start our next search from the next ref */
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hint = hint->next;
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}
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return ret;
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}
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static void update_tracking_ref(struct remote *remote, struct ref *ref)
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{
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struct refspec rs;
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if (ref->status != REF_STATUS_OK)
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return;
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rs.src = ref->name;
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rs.dst = NULL;
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if (!remote_find_tracking(remote, &rs)) {
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if (args.verbose)
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fprintf(stderr, "updating local tracking ref '%s'\n", rs.dst);
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if (ref->deletion) {
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if (delete_ref(rs.dst, NULL))
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error("Failed to delete");
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} else
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update_ref("update by push", rs.dst,
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ref->new_sha1, NULL, 0, 0);
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free(rs.dst);
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}
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}
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static const char *prettify_ref(const struct ref *ref)
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{
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const char *name = ref->name;
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return name + (
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!prefixcmp(name, "refs/heads/") ? 11 :
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!prefixcmp(name, "refs/tags/") ? 10 :
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!prefixcmp(name, "refs/remotes/") ? 13 :
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0);
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}
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#define SUMMARY_WIDTH (2 * DEFAULT_ABBREV + 3)
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static void print_ref_status(char flag, const char *summary, struct ref *to, struct ref *from, const char *msg)
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{
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fprintf(stderr, " %c %-*s ", flag, SUMMARY_WIDTH, summary);
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if (from)
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fprintf(stderr, "%s -> %s", prettify_ref(from), prettify_ref(to));
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else
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fputs(prettify_ref(to), stderr);
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if (msg) {
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fputs(" (", stderr);
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fputs(msg, stderr);
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fputc(')', stderr);
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}
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fputc('\n', stderr);
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}
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static const char *status_abbrev(unsigned char sha1[20])
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{
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const char *abbrev;
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abbrev = find_unique_abbrev(sha1, DEFAULT_ABBREV);
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return abbrev ? abbrev : sha1_to_hex(sha1);
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}
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static void print_ok_ref_status(struct ref *ref)
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{
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if (ref->deletion)
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print_ref_status('-', "[deleted]", ref, NULL, NULL);
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else if (is_null_sha1(ref->old_sha1))
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print_ref_status('*',
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(!prefixcmp(ref->name, "refs/tags/") ? "[new tag]" :
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"[new branch]"),
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ref, ref->peer_ref, NULL);
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else {
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char quickref[84];
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char type;
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const char *msg;
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strcpy(quickref, status_abbrev(ref->old_sha1));
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if (ref->nonfastforward) {
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strcat(quickref, "...");
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type = '+';
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msg = "forced update";
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} else {
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strcat(quickref, "..");
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type = ' ';
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msg = NULL;
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}
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strcat(quickref, status_abbrev(ref->new_sha1));
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print_ref_status(type, quickref, ref, ref->peer_ref, msg);
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}
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}
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static void print_push_status(const char *dest, struct ref *refs)
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{
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struct ref *ref;
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int shown_dest = 0;
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for (ref = refs; ref; ref = ref->next) {
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if (!ref->status)
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continue;
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if (ref->status == REF_STATUS_UPTODATE && !args.verbose)
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continue;
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if (!shown_dest) {
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fprintf(stderr, "To %s\n", dest);
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shown_dest = 1;
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}
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switch(ref->status) {
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case REF_STATUS_NONE:
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print_ref_status('X', "[no match]", ref, NULL, NULL);
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break;
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case REF_STATUS_REJECT_NODELETE:
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print_ref_status('!', "[rejected]", ref, NULL,
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"remote does not support deleting refs");
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break;
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case REF_STATUS_UPTODATE:
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print_ref_status('=', "[up to date]", ref,
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ref->peer_ref, NULL);
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break;
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case REF_STATUS_REJECT_NONFASTFORWARD:
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print_ref_status('!', "[rejected]", ref, ref->peer_ref,
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"non-fast forward");
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break;
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case REF_STATUS_REMOTE_REJECT:
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print_ref_status('!', "[remote rejected]", ref,
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ref->deletion ? NULL : ref->peer_ref,
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ref->remote_status);
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break;
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case REF_STATUS_EXPECTING_REPORT:
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print_ref_status('!', "[remote failure]", ref,
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ref->deletion ? NULL : ref->peer_ref,
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"remote failed to report status");
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break;
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case REF_STATUS_OK:
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print_ok_ref_status(ref);
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break;
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}
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}
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}
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static int do_send_pack(int in, int out, struct remote *remote, const char *dest, int nr_refspec, const char **refspec)
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{
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struct ref *ref;
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int new_refs;
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int ask_for_status_report = 0;
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int allow_deleting_refs = 0;
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int expect_status_report = 0;
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int flags = MATCH_REFS_NONE;
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int ret;
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if (args.send_all)
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flags |= MATCH_REFS_ALL;
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if (args.send_mirror)
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flags |= MATCH_REFS_MIRROR;
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/* No funny business with the matcher */
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remote_tail = get_remote_heads(in, &remote_refs, 0, NULL, REF_NORMAL);
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get_local_heads();
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/* Does the other end support the reporting? */
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if (server_supports("report-status"))
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ask_for_status_report = 1;
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if (server_supports("delete-refs"))
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allow_deleting_refs = 1;
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/* match them up */
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if (!remote_tail)
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remote_tail = &remote_refs;
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if (match_refs(local_refs, remote_refs, &remote_tail,
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nr_refspec, refspec, flags))
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return -1;
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if (!remote_refs) {
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fprintf(stderr, "No refs in common and none specified; doing nothing.\n"
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"Perhaps you should specify a branch such as 'master'.\n");
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return 0;
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}
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/*
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* Finally, tell the other end!
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*/
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new_refs = 0;
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for (ref = remote_refs; ref; ref = ref->next) {
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const unsigned char *new_sha1;
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if (!ref->peer_ref) {
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if (!args.send_mirror)
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continue;
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new_sha1 = null_sha1;
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}
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else
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new_sha1 = ref->peer_ref->new_sha1;
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ref->deletion = is_null_sha1(new_sha1);
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if (ref->deletion && !allow_deleting_refs) {
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ref->status = REF_STATUS_REJECT_NODELETE;
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continue;
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}
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if (!ref->deletion &&
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!hashcmp(ref->old_sha1, new_sha1)) {
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ref->status = REF_STATUS_UPTODATE;
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continue;
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}
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/* This part determines what can overwrite what.
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* The rules are:
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*
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* (0) you can always use --force or +A:B notation to
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* selectively force individual ref pairs.
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*
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* (1) if the old thing does not exist, it is OK.
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*
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* (2) if you do not have the old thing, you are not allowed
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* to overwrite it; you would not know what you are losing
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* otherwise.
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*
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* (3) if both new and old are commit-ish, and new is a
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* descendant of old, it is OK.
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*
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* (4) regardless of all of the above, removing :B is
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* always allowed.
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*/
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ref->nonfastforward =
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!ref->deletion &&
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!is_null_sha1(ref->old_sha1) &&
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(!has_sha1_file(ref->old_sha1)
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|| !ref_newer(new_sha1, ref->old_sha1));
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if (ref->nonfastforward && !ref->force && !args.force_update) {
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ref->status = REF_STATUS_REJECT_NONFASTFORWARD;
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continue;
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}
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hashcpy(ref->new_sha1, new_sha1);
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if (!ref->deletion)
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new_refs++;
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if (!args.dry_run) {
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char *old_hex = sha1_to_hex(ref->old_sha1);
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char *new_hex = sha1_to_hex(ref->new_sha1);
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if (ask_for_status_report) {
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packet_write(out, "%s %s %s%c%s",
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old_hex, new_hex, ref->name, 0,
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"report-status");
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ask_for_status_report = 0;
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expect_status_report = 1;
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}
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else
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packet_write(out, "%s %s %s",
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old_hex, new_hex, ref->name);
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}
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ref->status = expect_status_report ?
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REF_STATUS_EXPECTING_REPORT :
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REF_STATUS_OK;
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}
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packet_flush(out);
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if (new_refs && !args.dry_run) {
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if (pack_objects(out, remote_refs) < 0) {
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close(out);
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return -1;
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}
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}
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close(out);
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if (expect_status_report)
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ret = receive_status(in, remote_refs);
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else
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ret = 0;
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print_push_status(dest, remote_refs);
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if (!args.dry_run && remote) {
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for (ref = remote_refs; ref; ref = ref->next)
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update_tracking_ref(remote, ref);
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}
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if (!new_refs)
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fprintf(stderr, "Everything up-to-date\n");
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if (ret < 0)
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return ret;
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for (ref = remote_refs; ref; ref = ref->next) {
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switch (ref->status) {
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case REF_STATUS_NONE:
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case REF_STATUS_UPTODATE:
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case REF_STATUS_OK:
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break;
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default:
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return -1;
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}
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}
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return 0;
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}
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static void verify_remote_names(int nr_heads, const char **heads)
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{
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int i;
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for (i = 0; i < nr_heads; i++) {
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const char *remote = strchr(heads[i], ':');
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remote = remote ? (remote + 1) : heads[i];
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switch (check_ref_format(remote)) {
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case 0: /* ok */
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case -2: /* ok but a single level -- that is fine for
|
|
* a match pattern.
|
|
*/
|
|
case -3: /* ok but ends with a pattern-match character */
|
|
continue;
|
|
}
|
|
die("remote part of refspec is not a valid name in %s",
|
|
heads[i]);
|
|
}
|
|
}
|
|
|
|
int cmd_send_pack(int argc, const char **argv, const char *prefix)
|
|
{
|
|
int i, nr_heads = 0;
|
|
const char **heads = NULL;
|
|
const char *remote_name = NULL;
|
|
struct remote *remote = NULL;
|
|
const char *dest = NULL;
|
|
|
|
argv++;
|
|
for (i = 1; i < argc; i++, argv++) {
|
|
const char *arg = *argv;
|
|
|
|
if (*arg == '-') {
|
|
if (!prefixcmp(arg, "--receive-pack=")) {
|
|
args.receivepack = arg + 15;
|
|
continue;
|
|
}
|
|
if (!prefixcmp(arg, "--exec=")) {
|
|
args.receivepack = arg + 7;
|
|
continue;
|
|
}
|
|
if (!prefixcmp(arg, "--remote=")) {
|
|
remote_name = arg + 9;
|
|
continue;
|
|
}
|
|
if (!strcmp(arg, "--all")) {
|
|
args.send_all = 1;
|
|
continue;
|
|
}
|
|
if (!strcmp(arg, "--dry-run")) {
|
|
args.dry_run = 1;
|
|
continue;
|
|
}
|
|
if (!strcmp(arg, "--mirror")) {
|
|
args.send_mirror = 1;
|
|
continue;
|
|
}
|
|
if (!strcmp(arg, "--force")) {
|
|
args.force_update = 1;
|
|
continue;
|
|
}
|
|
if (!strcmp(arg, "--verbose")) {
|
|
args.verbose = 1;
|
|
continue;
|
|
}
|
|
if (!strcmp(arg, "--thin")) {
|
|
args.use_thin_pack = 1;
|
|
continue;
|
|
}
|
|
usage(send_pack_usage);
|
|
}
|
|
if (!dest) {
|
|
dest = arg;
|
|
continue;
|
|
}
|
|
heads = (const char **) argv;
|
|
nr_heads = argc - i;
|
|
break;
|
|
}
|
|
if (!dest)
|
|
usage(send_pack_usage);
|
|
/*
|
|
* --all and --mirror are incompatible; neither makes sense
|
|
* with any refspecs.
|
|
*/
|
|
if ((heads && (args.send_all || args.send_mirror)) ||
|
|
(args.send_all && args.send_mirror))
|
|
usage(send_pack_usage);
|
|
|
|
if (remote_name) {
|
|
remote = remote_get(remote_name);
|
|
if (!remote_has_url(remote, dest)) {
|
|
die("Destination %s is not a uri for %s",
|
|
dest, remote_name);
|
|
}
|
|
}
|
|
|
|
return send_pack(&args, dest, remote, nr_heads, heads);
|
|
}
|
|
|
|
int send_pack(struct send_pack_args *my_args,
|
|
const char *dest, struct remote *remote,
|
|
int nr_heads, const char **heads)
|
|
{
|
|
int fd[2], ret;
|
|
struct child_process *conn;
|
|
|
|
memcpy(&args, my_args, sizeof(args));
|
|
|
|
verify_remote_names(nr_heads, heads);
|
|
|
|
conn = git_connect(fd, dest, args.receivepack, args.verbose ? CONNECT_VERBOSE : 0);
|
|
ret = do_send_pack(fd[0], fd[1], remote, dest, nr_heads, heads);
|
|
close(fd[0]);
|
|
close(fd[1]);
|
|
ret |= finish_connect(conn);
|
|
return !!ret;
|
|
}
|