Andrew's git - gitweb.git/blob

   1#include "builtin.h"
   2#include "commit.h"
   3#include "refs.h"
   4#include "pkt-line.h"
   5#include "sideband.h"
   6#include "run-command.h"
   7#include "remote.h"
   8#include "send-pack.h"
   9#include "quote.h"
  10#include "transport.h"
  11#include "version.h"
  12
  13static int feed_object(const unsigned char *sha1, int fd, int negative)
  14{
  15        char buf[42];
  16
  17        if (negative && !has_sha1_file(sha1))
  18                return 1;
  19
  20        memcpy(buf + negative, sha1_to_hex(sha1), 40);
  21        if (negative)
  22                buf[0] = '^';
  23        buf[40 + negative] = '\n';
  24        return write_or_whine(fd, buf, 41 + negative, "send-pack: send refs");
  25}
  26
  27/*
  28 * Make a pack stream and spit it out into file descriptor fd
  29 */
  30static int pack_objects(int fd, struct ref *refs, struct extra_have_objects *extra, struct send_pack_args *args)
  31{
  32        /*
  33         * The child becomes pack-objects --revs; we feed
  34         * the revision parameters to it via its stdin and
  35         * let its stdout go back to the other end.
  36         */
  37        const char *argv[] = {
  38                "pack-objects",
  39                "--all-progress-implied",
  40                "--revs",
  41                "--stdout",
  42                NULL,
  43                NULL,
  44                NULL,
  45                NULL,
  46                NULL,
  47        };
  48        struct child_process po;
  49        int i;
  50
  51        i = 4;
  52        if (args->use_thin_pack)
  53                argv[i++] = "--thin";
  54        if (args->use_ofs_delta)
  55                argv[i++] = "--delta-base-offset";
  56        if (args->quiet || !args->progress)
  57                argv[i++] = "-q";
  58        if (args->progress)
  59                argv[i++] = "--progress";
  60        memset(&po, 0, sizeof(po));
  61        po.argv = argv;
  62        po.in = -1;
  63        po.out = args->stateless_rpc ? -1 : fd;
  64        po.git_cmd = 1;
  65        if (start_command(&po))
  66                die_errno("git pack-objects failed");
  67
  68        /*
  69         * We feed the pack-objects we just spawned with revision
  70         * parameters by writing to the pipe.
  71         */
  72        for (i = 0; i < extra->nr; i++)
  73                if (!feed_object(extra->array[i], po.in, 1))
  74                        break;
  75
  76        while (refs) {
  77                if (!is_null_sha1(refs->old_sha1) &&
  78                    !feed_object(refs->old_sha1, po.in, 1))
  79                        break;
  80                if (!is_null_sha1(refs->new_sha1) &&
  81                    !feed_object(refs->new_sha1, po.in, 0))
  82                        break;
  83                refs = refs->next;
  84        }
  85
  86        close(po.in);
  87
  88        if (args->stateless_rpc) {
  89                char *buf = xmalloc(LARGE_PACKET_MAX);
  90                while (1) {
  91                        ssize_t n = xread(po.out, buf, LARGE_PACKET_MAX);
  92                        if (n <= 0)
  93                                break;
  94                        send_sideband(fd, -1, buf, n, LARGE_PACKET_MAX);
  95                }
  96                free(buf);
  97                close(po.out);
  98                po.out = -1;
  99        }
 100
 101        if (finish_command(&po))
 102                return -1;
 103        return 0;
 104}
 105
 106static int receive_status(int in, struct ref *refs)
 107{
 108        struct ref *hint;
 109        char line[1000];
 110        int ret = 0;
 111        int len = packet_read_line(in, line, sizeof(line));
 112        if (len < 10 || memcmp(line, "unpack ", 7))
 113                return error("did not receive remote status");
 114        if (memcmp(line, "unpack ok\n", 10)) {
 115                char *p = line + strlen(line) - 1;
 116                if (*p == '\n')
 117                        *p = '\0';
 118                error("unpack failed: %s", line + 7);
 119                ret = -1;
 120        }
 121        hint = NULL;
 122        while (1) {
 123                char *refname;
 124                char *msg;
 125                len = packet_read_line(in, line, sizeof(line));
 126                if (!len)
 127                        break;
 128                if (len < 3 ||
 129                    (memcmp(line, "ok ", 3) && memcmp(line, "ng ", 3))) {
 130                        fprintf(stderr, "protocol error: %s\n", line);
 131                        ret = -1;
 132                        break;
 133                }
 134
 135                line[strlen(line)-1] = '\0';
 136                refname = line + 3;
 137                msg = strchr(refname, ' ');
 138                if (msg)
 139                        *msg++ = '\0';
 140
 141                /* first try searching at our hint, falling back to all refs */
 142                if (hint)
 143                        hint = find_ref_by_name(hint, refname);
 144                if (!hint)
 145                        hint = find_ref_by_name(refs, refname);
 146                if (!hint) {
 147                        warning("remote reported status on unknown ref: %s",
 148                                        refname);
 149                        continue;
 150                }
 151                if (hint->status != REF_STATUS_EXPECTING_REPORT) {
 152                        warning("remote reported status on unexpected ref: %s",
 153                                        refname);
 154                        continue;
 155                }
 156
 157                if (line[0] == 'o' && line[1] == 'k')
 158                        hint->status = REF_STATUS_OK;
 159                else {
 160                        hint->status = REF_STATUS_REMOTE_REJECT;
 161                        ret = -1;
 162                }
 163                if (msg)
 164                        hint->remote_status = xstrdup(msg);
 165                /* start our next search from the next ref */
 166                hint = hint->next;
 167        }
 168        return ret;
 169}
 170
 171static int sideband_demux(int in, int out, void *data)
 172{
 173        int *fd = data, ret;
 174#ifdef NO_PTHREADS
 175        close(fd[1]);
 176#endif
 177        ret = recv_sideband("send-pack", fd[0], out);
 178        close(out);
 179        return ret;
 180}
 181
 182int send_pack(struct send_pack_args *args,
 183              int fd[], struct child_process *conn,
 184              struct ref *remote_refs,
 185              struct extra_have_objects *extra_have)
 186{
 187        int in = fd[0];
 188        int out = fd[1];
 189        struct strbuf req_buf = STRBUF_INIT;
 190        struct ref *ref;
 191        int new_refs;
 192        int allow_deleting_refs = 0;
 193        int status_report = 0;
 194        int use_sideband = 0;
 195        int quiet_supported = 0;
 196        int agent_supported = 0;
 197        unsigned cmds_sent = 0;
 198        int ret;
 199        struct async demux;
 200
 201        /* Does the other end support the reporting? */
 202        if (server_supports("report-status"))
 203                status_report = 1;
 204        if (server_supports("delete-refs"))
 205                allow_deleting_refs = 1;
 206        if (server_supports("ofs-delta"))
 207                args->use_ofs_delta = 1;
 208        if (server_supports("side-band-64k"))
 209                use_sideband = 1;
 210        if (server_supports("quiet"))
 211                quiet_supported = 1;
 212        if (server_supports("agent"))
 213                agent_supported = 1;
 214
 215        if (!remote_refs) {
 216                fprintf(stderr, "No refs in common and none specified; doing nothing.\n"
 217                        "Perhaps you should specify a branch such as 'master'.\n");
 218                return 0;
 219        }
 220
 221        /*
 222         * Finally, tell the other end!
 223         */
 224        new_refs = 0;
 225        for (ref = remote_refs; ref; ref = ref->next) {
 226                if (!ref->peer_ref && !args->send_mirror)
 227                        continue;
 228
 229                /* Check for statuses set by set_ref_status_for_push() */
 230                switch (ref->status) {
 231                case REF_STATUS_REJECT_NONFASTFORWARD:
 232                case REF_STATUS_REJECT_ALREADY_EXISTS:
 233                case REF_STATUS_REJECT_FETCH_FIRST:
 234                case REF_STATUS_REJECT_NEEDS_FORCE:
 235                case REF_STATUS_UPTODATE:
 236                        continue;
 237                default:
 238                        ; /* do nothing */
 239                }
 240
 241                if (ref->deletion && !allow_deleting_refs) {
 242                        ref->status = REF_STATUS_REJECT_NODELETE;
 243                        continue;
 244                }
 245
 246                if (!ref->deletion)
 247                        new_refs++;
 248
 249                if (args->dry_run) {
 250                        ref->status = REF_STATUS_OK;
 251                } else {
 252                        char *old_hex = sha1_to_hex(ref->old_sha1);
 253                        char *new_hex = sha1_to_hex(ref->new_sha1);
 254                        int quiet = quiet_supported && (args->quiet || !args->progress);
 255
 256                        if (!cmds_sent && (status_report || use_sideband ||
 257                                           quiet || agent_supported)) {
 258                                packet_buf_write(&req_buf,
 259                                                 "%s %s %s%c%s%s%s%s%s",
 260                                                 old_hex, new_hex, ref->name, 0,
 261                                                 status_report ? " report-status" : "",
 262                                                 use_sideband ? " side-band-64k" : "",
 263                                                 quiet ? " quiet" : "",
 264                                                 agent_supported ? " agent=" : "",
 265                                                 agent_supported ? git_user_agent_sanitized() : ""
 266                                                );
 267                        }
 268                        else
 269                                packet_buf_write(&req_buf, "%s %s %s",
 270                                                 old_hex, new_hex, ref->name);
 271                        ref->status = status_report ?
 272                                REF_STATUS_EXPECTING_REPORT :
 273                                REF_STATUS_OK;
 274                        cmds_sent++;
 275                }
 276        }
 277
 278        if (args->stateless_rpc) {
 279                if (!args->dry_run && cmds_sent) {
 280                        packet_buf_flush(&req_buf);
 281                        send_sideband(out, -1, req_buf.buf, req_buf.len, LARGE_PACKET_MAX);
 282                }
 283        } else {
 284                safe_write(out, req_buf.buf, req_buf.len);
 285                packet_flush(out);
 286        }
 287        strbuf_release(&req_buf);
 288
 289        if (use_sideband && cmds_sent) {
 290                memset(&demux, 0, sizeof(demux));
 291                demux.proc = sideband_demux;
 292                demux.data = fd;
 293                demux.out = -1;
 294                if (start_async(&demux))
 295                        die("send-pack: unable to fork off sideband demultiplexer");
 296                in = demux.out;
 297        }
 298
 299        if (new_refs && cmds_sent) {
 300                if (pack_objects(out, remote_refs, extra_have, args) < 0) {
 301                        for (ref = remote_refs; ref; ref = ref->next)
 302                                ref->status = REF_STATUS_NONE;
 303                        if (args->stateless_rpc)
 304                                close(out);
 305                        if (git_connection_is_socket(conn))
 306                                shutdown(fd[0], SHUT_WR);
 307                        if (use_sideband)
 308                                finish_async(&demux);
 309                        return -1;
 310                }
 311        }
 312        if (args->stateless_rpc && cmds_sent)
 313                packet_flush(out);
 314
 315        if (status_report && cmds_sent)
 316                ret = receive_status(in, remote_refs);
 317        else
 318                ret = 0;
 319        if (args->stateless_rpc)
 320                packet_flush(out);
 321
 322        if (use_sideband && cmds_sent) {
 323                if (finish_async(&demux)) {
 324                        error("error in sideband demultiplexer");
 325                        ret = -1;
 326                }
 327                close(demux.out);
 328        }
 329
 330        if (ret < 0)
 331                return ret;
 332
 333        if (args->porcelain)
 334                return 0;
 335
 336        for (ref = remote_refs; ref; ref = ref->next) {
 337                switch (ref->status) {
 338                case REF_STATUS_NONE:
 339                case REF_STATUS_UPTODATE:
 340                case REF_STATUS_OK:
 341                        break;
 342                default:
 343                        return -1;
 344                }
 345        }
 346        return 0;
 347}