mirror of
https://github.com/git/git.git
synced 2024-11-24 18:33:43 +08:00
dd787c19c4
* tr/die_errno: Use die_errno() instead of die() when checking syscalls Convert existing die(..., strerror(errno)) to die_errno() die_errno(): double % in strerror() output just in case Introduce die_errno() that appends strerror(errno) to die()
593 lines
14 KiB
C
593 lines
14 KiB
C
#include "cache.h"
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#include "commit.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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static int feed_object(const unsigned char *sha1, int fd, int negative)
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{
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char buf[42];
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if (negative && !has_sha1_file(sha1))
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return 1;
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memcpy(buf + negative, sha1_to_hex(sha1), 40);
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if (negative)
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buf[0] = '^';
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buf[40 + negative] = '\n';
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return write_or_whine(fd, buf, 41 + negative, "send-pack: send refs");
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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, struct extra_have_objects *extra, struct send_pack_args *args)
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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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NULL,
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};
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struct child_process po;
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int i;
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i = 4;
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if (args->use_thin_pack)
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argv[i++] = "--thin";
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if (args->use_ofs_delta)
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argv[i++] = "--delta-base-offset";
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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_errno("git pack-objects failed");
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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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for (i = 0; i < extra->nr; i++)
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if (!feed_object(extra->array[i], po.in, 1))
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break;
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while (refs) {
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if (!is_null_sha1(refs->old_sha1) &&
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!feed_object(refs->old_sha1, po.in, 1))
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break;
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if (!is_null_sha1(refs->new_sha1) &&
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!feed_object(refs->new_sha1, po.in, 0))
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break;
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refs = refs->next;
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}
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close(po.in);
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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 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 && ref->status != REF_STATUS_UPTODATE)
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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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delete_ref(rs.dst, NULL, 0);
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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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#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_refname(from->name), prettify_refname(to->name));
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else
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fputs(prettify_refname(to->name), 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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return find_unique_abbrev(sha1, DEFAULT_ABBREV);
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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 int print_one_push_status(struct ref *ref, const char *dest, int count)
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{
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if (!count)
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fprintf(stderr, "To %s\n", dest);
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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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return 1;
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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 n = 0;
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if (args.verbose) {
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for (ref = refs; ref; ref = ref->next)
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if (ref->status == REF_STATUS_UPTODATE)
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n += print_one_push_status(ref, dest, n);
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}
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for (ref = refs; ref; ref = ref->next)
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if (ref->status == REF_STATUS_OK)
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n += print_one_push_status(ref, dest, n);
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for (ref = refs; ref; ref = ref->next) {
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if (ref->status != REF_STATUS_NONE &&
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ref->status != REF_STATUS_UPTODATE &&
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ref->status != REF_STATUS_OK)
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n += print_one_push_status(ref, dest, n);
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}
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}
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static int refs_pushed(struct ref *ref)
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{
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for (; 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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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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int send_pack(struct send_pack_args *args,
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int fd[], struct child_process *conn,
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struct ref *remote_refs,
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struct extra_have_objects *extra_have)
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{
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int in = fd[0];
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int out = fd[1];
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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 ret;
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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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if (server_supports("ofs-delta"))
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args->use_ofs_delta = 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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if (ref->peer_ref)
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hashcpy(ref->new_sha1, ref->peer_ref->new_sha1);
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else if (!args->send_mirror)
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continue;
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ref->deletion = is_null_sha1(ref->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, ref->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(ref->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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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, extra_have, args) < 0) {
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for (ref = remote_refs; ref; ref = ref->next)
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ref->status = REF_STATUS_NONE;
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return -1;
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}
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}
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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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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 *local = heads[i];
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const char *remote = strrchr(heads[i], ':');
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if (*local == '+')
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local++;
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/* A matching refspec is okay. */
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if (remote == local && remote[1] == '\0')
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continue;
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remote = remote ? (remote + 1) : local;
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switch (check_ref_format(remote)) {
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case 0: /* ok */
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case CHECK_REF_FORMAT_ONELEVEL:
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/* ok but a single level -- that is fine for
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* a match pattern.
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*/
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case CHECK_REF_FORMAT_WILDCARD:
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/* ok but ends with a pattern-match character */
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continue;
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}
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die("remote part of refspec is not a valid name in %s",
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heads[i]);
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}
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}
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int cmd_send_pack(int argc, const char **argv, const char *prefix)
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{
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int i, nr_refspecs = 0;
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const char **refspecs = NULL;
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const char *remote_name = NULL;
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struct remote *remote = NULL;
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const char *dest = NULL;
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int fd[2];
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struct child_process *conn;
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struct extra_have_objects extra_have;
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struct ref *remote_refs, *local_refs;
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int ret;
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int send_all = 0;
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const char *receivepack = "git-receive-pack";
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int flags;
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argv++;
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for (i = 1; i < argc; i++, argv++) {
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const char *arg = *argv;
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if (*arg == '-') {
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if (!prefixcmp(arg, "--receive-pack=")) {
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receivepack = arg + 15;
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continue;
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}
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if (!prefixcmp(arg, "--exec=")) {
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receivepack = arg + 7;
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continue;
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}
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if (!prefixcmp(arg, "--remote=")) {
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remote_name = arg + 9;
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continue;
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}
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if (!strcmp(arg, "--all")) {
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send_all = 1;
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continue;
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}
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if (!strcmp(arg, "--dry-run")) {
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args.dry_run = 1;
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continue;
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}
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if (!strcmp(arg, "--mirror")) {
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args.send_mirror = 1;
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continue;
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}
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if (!strcmp(arg, "--force")) {
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args.force_update = 1;
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continue;
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}
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if (!strcmp(arg, "--verbose")) {
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args.verbose = 1;
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continue;
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}
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if (!strcmp(arg, "--thin")) {
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args.use_thin_pack = 1;
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continue;
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}
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usage(send_pack_usage);
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}
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if (!dest) {
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dest = arg;
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continue;
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}
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refspecs = (const char **) argv;
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nr_refspecs = argc - i;
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break;
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}
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if (!dest)
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usage(send_pack_usage);
|
|
/*
|
|
* --all and --mirror are incompatible; neither makes sense
|
|
* with any refspecs.
|
|
*/
|
|
if ((refspecs && (send_all || args.send_mirror)) ||
|
|
(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);
|
|
}
|
|
}
|
|
|
|
conn = git_connect(fd, dest, receivepack, args.verbose ? CONNECT_VERBOSE : 0);
|
|
|
|
memset(&extra_have, 0, sizeof(extra_have));
|
|
|
|
get_remote_heads(fd[0], &remote_refs, 0, NULL, REF_NORMAL,
|
|
&extra_have);
|
|
|
|
verify_remote_names(nr_refspecs, refspecs);
|
|
|
|
local_refs = get_local_heads();
|
|
|
|
flags = MATCH_REFS_NONE;
|
|
|
|
if (send_all)
|
|
flags |= MATCH_REFS_ALL;
|
|
if (args.send_mirror)
|
|
flags |= MATCH_REFS_MIRROR;
|
|
|
|
/* match them up */
|
|
if (match_refs(local_refs, &remote_refs, nr_refspecs, refspecs, flags))
|
|
return -1;
|
|
|
|
ret = send_pack(&args, fd, conn, remote_refs, &extra_have);
|
|
|
|
close(fd[1]);
|
|
close(fd[0]);
|
|
|
|
ret |= finish_connect(conn);
|
|
|
|
print_push_status(dest, remote_refs);
|
|
|
|
if (!args.dry_run && remote) {
|
|
struct ref *ref;
|
|
for (ref = remote_refs; ref; ref = ref->next)
|
|
update_tracking_ref(remote, ref);
|
|
}
|
|
|
|
if (!ret && !refs_pushed(remote_refs))
|
|
fprintf(stderr, "Everything up-to-date\n");
|
|
|
|
return ret;
|
|
}
|