Andrew's git - gitweb.git/blob - builtin-fetch--tool.c

   1#include "builtin.h"
   2#include "cache.h"
   3#include "refs.h"
   4#include "commit.h"
   5#include "strbuf.h"
   6
   7static char *get_stdin(void)
   8{
   9        struct strbuf buf;
  10        strbuf_init(&buf, 0);
  11        if (strbuf_read(&buf, 0, 1024) < 0) {
  12                die("error reading standard input: %s", strerror(errno));
  13        }
  14        return strbuf_detach(&buf);
  15}
  16
  17static void show_new(enum object_type type, unsigned char *sha1_new)
  18{
  19        fprintf(stderr, "  %s: %s\n", typename(type),
  20                find_unique_abbrev(sha1_new, DEFAULT_ABBREV));
  21}
  22
  23static int update_ref_env(const char *action,
  24                      const char *refname,
  25                      unsigned char *sha1,
  26                      unsigned char *oldval)
  27{
  28        char msg[1024];
  29        char *rla = getenv("GIT_REFLOG_ACTION");
  30
  31        if (!rla)
  32                rla = "(reflog update)";
  33        if (snprintf(msg, sizeof(msg), "%s: %s", rla, action) >= sizeof(msg))
  34                warning("reflog message too long: %.*s...", 50, msg);
  35        return update_ref(msg, refname, sha1, oldval, 0, QUIET_ON_ERR);
  36}
  37
  38static int update_local_ref(const char *name,
  39                            const char *new_head,
  40                            const char *note,
  41                            int verbose, int force)
  42{
  43        unsigned char sha1_old[20], sha1_new[20];
  44        char oldh[41], newh[41];
  45        struct commit *current, *updated;
  46        enum object_type type;
  47
  48        if (get_sha1_hex(new_head, sha1_new))
  49                die("malformed object name %s", new_head);
  50
  51        type = sha1_object_info(sha1_new, NULL);
  52        if (type < 0)
  53                die("object %s not found", new_head);
  54
  55        if (!*name) {
  56                /* Not storing */
  57                if (verbose) {
  58                        fprintf(stderr, "* fetched %s\n", note);
  59                        show_new(type, sha1_new);
  60                }
  61                return 0;
  62        }
  63
  64        if (get_sha1(name, sha1_old)) {
  65                char *msg;
  66        just_store:
  67                /* new ref */
  68                if (!strncmp(name, "refs/tags/", 10))
  69                        msg = "storing tag";
  70                else
  71                        msg = "storing head";
  72                fprintf(stderr, "* %s: storing %s\n",
  73                        name, note);
  74                show_new(type, sha1_new);
  75                return update_ref_env(msg, name, sha1_new, NULL);
  76        }
  77
  78        if (!hashcmp(sha1_old, sha1_new)) {
  79                if (verbose) {
  80                        fprintf(stderr, "* %s: same as %s\n", name, note);
  81                        show_new(type, sha1_new);
  82                }
  83                return 0;
  84        }
  85
  86        if (!strncmp(name, "refs/tags/", 10)) {
  87                fprintf(stderr, "* %s: updating with %s\n", name, note);
  88                show_new(type, sha1_new);
  89                return update_ref_env("updating tag", name, sha1_new, NULL);
  90        }
  91
  92        current = lookup_commit_reference(sha1_old);
  93        updated = lookup_commit_reference(sha1_new);
  94        if (!current || !updated)
  95                goto just_store;
  96
  97        strcpy(oldh, find_unique_abbrev(current->object.sha1, DEFAULT_ABBREV));
  98        strcpy(newh, find_unique_abbrev(sha1_new, DEFAULT_ABBREV));
  99
 100        if (in_merge_bases(current, &updated, 1)) {
 101                fprintf(stderr, "* %s: fast forward to %s\n",
 102                        name, note);
 103                fprintf(stderr, "  old..new: %s..%s\n", oldh, newh);
 104                return update_ref_env("fast forward", name, sha1_new, sha1_old);
 105        }
 106        if (!force) {
 107                fprintf(stderr,
 108                        "* %s: not updating to non-fast forward %s\n",
 109                        name, note);
 110                fprintf(stderr,
 111                        "  old...new: %s...%s\n", oldh, newh);
 112                return 1;
 113        }
 114        fprintf(stderr,
 115                "* %s: forcing update to non-fast forward %s\n",
 116                name, note);
 117        fprintf(stderr, "  old...new: %s...%s\n", oldh, newh);
 118        return update_ref_env("forced-update", name, sha1_new, sha1_old);
 119}
 120
 121static int append_fetch_head(FILE *fp,
 122                             const char *head, const char *remote,
 123                             const char *remote_name, const char *remote_nick,
 124                             const char *local_name, int not_for_merge,
 125                             int verbose, int force)
 126{
 127        struct commit *commit;
 128        int remote_len, i, note_len;
 129        unsigned char sha1[20];
 130        char note[1024];
 131        const char *what, *kind;
 132
 133        if (get_sha1(head, sha1))
 134                return error("Not a valid object name: %s", head);
 135        commit = lookup_commit_reference(sha1);
 136        if (!commit)
 137                not_for_merge = 1;
 138
 139        if (!strcmp(remote_name, "HEAD")) {
 140                kind = "";
 141                what = "";
 142        }
 143        else if (!strncmp(remote_name, "refs/heads/", 11)) {
 144                kind = "branch";
 145                what = remote_name + 11;
 146        }
 147        else if (!strncmp(remote_name, "refs/tags/", 10)) {
 148                kind = "tag";
 149                what = remote_name + 10;
 150        }
 151        else if (!strncmp(remote_name, "refs/remotes/", 13)) {
 152                kind = "remote branch";
 153                what = remote_name + 13;
 154        }
 155        else {
 156                kind = "";
 157                what = remote_name;
 158        }
 159
 160        remote_len = strlen(remote);
 161        for (i = remote_len - 1; remote[i] == '/' && 0 <= i; i--)
 162                ;
 163        remote_len = i + 1;
 164        if (4 < i && !strncmp(".git", remote + i - 3, 4))
 165                remote_len = i - 3;
 166
 167        note_len = 0;
 168        if (*what) {
 169                if (*kind)
 170                        note_len += sprintf(note + note_len, "%s ", kind);
 171                note_len += sprintf(note + note_len, "'%s' of ", what);
 172        }
 173        note_len += sprintf(note + note_len, "%.*s", remote_len, remote);
 174        fprintf(fp, "%s\t%s\t%s\n",
 175                sha1_to_hex(commit ? commit->object.sha1 : sha1),
 176                not_for_merge ? "not-for-merge" : "",
 177                note);
 178        return update_local_ref(local_name, head, note, verbose, force);
 179}
 180
 181static char *keep;
 182static void remove_keep(void)
 183{
 184        if (keep && *keep)
 185                unlink(keep);
 186}
 187
 188static void remove_keep_on_signal(int signo)
 189{
 190        remove_keep();
 191        signal(SIGINT, SIG_DFL);
 192        raise(signo);
 193}
 194
 195static char *find_local_name(const char *remote_name, const char *refs,
 196                             int *force_p, int *not_for_merge_p)
 197{
 198        const char *ref = refs;
 199        int len = strlen(remote_name);
 200
 201        while (ref) {
 202                const char *next;
 203                int single_force, not_for_merge;
 204
 205                while (*ref == '\n')
 206                        ref++;
 207                if (!*ref)
 208                        break;
 209                next = strchr(ref, '\n');
 210
 211                single_force = not_for_merge = 0;
 212                if (*ref == '+') {
 213                        single_force = 1;
 214                        ref++;
 215                }
 216                if (*ref == '.') {
 217                        not_for_merge = 1;
 218                        ref++;
 219                        if (*ref == '+') {
 220                                single_force = 1;
 221                                ref++;
 222                        }
 223                }
 224                if (!strncmp(remote_name, ref, len) && ref[len] == ':') {
 225                        const char *local_part = ref + len + 1;
 226                        char *ret;
 227                        int retlen;
 228
 229                        if (!next)
 230                                retlen = strlen(local_part);
 231                        else
 232                                retlen = next - local_part;
 233                        ret = xmalloc(retlen + 1);
 234                        memcpy(ret, local_part, retlen);
 235                        ret[retlen] = 0;
 236                        *force_p = single_force;
 237                        *not_for_merge_p = not_for_merge;
 238                        return ret;
 239                }
 240                ref = next;
 241        }
 242        return NULL;
 243}
 244
 245static int fetch_native_store(FILE *fp,
 246                              const char *remote,
 247                              const char *remote_nick,
 248                              const char *refs,
 249                              int verbose, int force)
 250{
 251        char buffer[1024];
 252        int err = 0;
 253
 254        signal(SIGINT, remove_keep_on_signal);
 255        atexit(remove_keep);
 256
 257        while (fgets(buffer, sizeof(buffer), stdin)) {
 258                int len;
 259                char *cp;
 260                char *local_name;
 261                int single_force, not_for_merge;
 262
 263                for (cp = buffer; *cp && !isspace(*cp); cp++)
 264                        ;
 265                if (*cp)
 266                        *cp++ = 0;
 267                len = strlen(cp);
 268                if (len && cp[len-1] == '\n')
 269                        cp[--len] = 0;
 270                if (!strcmp(buffer, "failed"))
 271                        die("Fetch failure: %s", remote);
 272                if (!strcmp(buffer, "pack"))
 273                        continue;
 274                if (!strcmp(buffer, "keep")) {
 275                        char *od = get_object_directory();
 276                        int len = strlen(od) + strlen(cp) + 50;
 277                        keep = xmalloc(len);
 278                        sprintf(keep, "%s/pack/pack-%s.keep", od, cp);
 279                        continue;
 280                }
 281
 282                local_name = find_local_name(cp, refs,
 283                                             &single_force, &not_for_merge);
 284                if (!local_name)
 285                        continue;
 286                err |= append_fetch_head(fp,
 287                                         buffer, remote, cp, remote_nick,
 288                                         local_name, not_for_merge,
 289                                         verbose, force || single_force);
 290        }
 291        return err;
 292}
 293
 294static int parse_reflist(const char *reflist)
 295{
 296        const char *ref;
 297
 298        printf("refs='");
 299        for (ref = reflist; ref; ) {
 300                const char *next;
 301                while (*ref && isspace(*ref))
 302                        ref++;
 303                if (!*ref)
 304                        break;
 305                for (next = ref; *next && !isspace(*next); next++)
 306                        ;
 307                printf("\n%.*s", (int)(next - ref), ref);
 308                ref = next;
 309        }
 310        printf("'\n");
 311
 312        printf("rref='");
 313        for (ref = reflist; ref; ) {
 314                const char *next, *colon;
 315                while (*ref && isspace(*ref))
 316                        ref++;
 317                if (!*ref)
 318                        break;
 319                for (next = ref; *next && !isspace(*next); next++)
 320                        ;
 321                if (*ref == '.')
 322                        ref++;
 323                if (*ref == '+')
 324                        ref++;
 325                colon = strchr(ref, ':');
 326                putchar('\n');
 327                printf("%.*s", (int)((colon ? colon : next) - ref), ref);
 328                ref = next;
 329        }
 330        printf("'\n");
 331        return 0;
 332}
 333
 334static int expand_refs_wildcard(const char *ls_remote_result, int numrefs,
 335                                const char **refs)
 336{
 337        int i, matchlen, replacelen;
 338        int found_one = 0;
 339        const char *remote = *refs++;
 340        numrefs--;
 341
 342        if (numrefs == 0) {
 343                fprintf(stderr, "Nothing specified for fetching with remote.%s.fetch\n",
 344                        remote);
 345                printf("empty\n");
 346        }
 347
 348        for (i = 0; i < numrefs; i++) {
 349                const char *ref = refs[i];
 350                const char *lref = ref;
 351                const char *colon;
 352                const char *tail;
 353                const char *ls;
 354                const char *next;
 355
 356                if (*lref == '+')
 357                        lref++;
 358                colon = strchr(lref, ':');
 359                tail = lref + strlen(lref);
 360                if (!(colon &&
 361                      2 < colon - lref &&
 362                      colon[-1] == '*' &&
 363                      colon[-2] == '/' &&
 364                      2 < tail - (colon + 1) &&
 365                      tail[-1] == '*' &&
 366                      tail[-2] == '/')) {
 367                        /* not a glob */
 368                        if (!found_one++)
 369                                printf("explicit\n");
 370                        printf("%s\n", ref);
 371                        continue;
 372                }
 373
 374                /* glob */
 375                if (!found_one++)
 376                        printf("glob\n");
 377
 378                /* lref to colon-2 is remote hierarchy name;
 379                 * colon+1 to tail-2 is local.
 380                 */
 381                matchlen = (colon-1) - lref;
 382                replacelen = (tail-1) - (colon+1);
 383                for (ls = ls_remote_result; ls; ls = next) {
 384                        const char *eol;
 385                        unsigned char sha1[20];
 386                        int namelen;
 387
 388                        while (*ls && isspace(*ls))
 389                                ls++;
 390                        next = strchr(ls, '\n');
 391                        eol = !next ? (ls + strlen(ls)) : next;
 392                        if (!memcmp("^{}", eol-3, 3))
 393                                continue;
 394                        if (eol - ls < 40)
 395                                continue;
 396                        if (get_sha1_hex(ls, sha1))
 397                                continue;
 398                        ls += 40;
 399                        while (ls < eol && isspace(*ls))
 400                                ls++;
 401                        /* ls to next (or eol) is the name.
 402                         * is it identical to lref to colon-2?
 403                         */
 404                        if ((eol - ls) <= matchlen ||
 405                            strncmp(ls, lref, matchlen))
 406                                continue;
 407
 408                        /* Yes, it is a match */
 409                        namelen = eol - ls;
 410                        if (lref != ref)
 411                                putchar('+');
 412                        printf("%.*s:%.*s%.*s\n",
 413                               namelen, ls,
 414                               replacelen, colon + 1,
 415                               namelen - matchlen, ls + matchlen);
 416                }
 417        }
 418        return 0;
 419}
 420
 421static int pick_rref(int sha1_only, const char *rref, const char *ls_remote_result)
 422{
 423        int err = 0;
 424        int lrr_count = lrr_count, i, pass;
 425        const char *cp;
 426        struct lrr {
 427                const char *line;
 428                const char *name;
 429                int namelen;
 430                int shown;
 431        } *lrr_list = lrr_list;
 432
 433        for (pass = 0; pass < 2; pass++) {
 434                /* pass 0 counts and allocates, pass 1 fills... */
 435                cp = ls_remote_result;
 436                i = 0;
 437                while (1) {
 438                        const char *np;
 439                        while (*cp && isspace(*cp))
 440                                cp++;
 441                        if (!*cp)
 442                                break;
 443                        np = strchr(cp, '\n');
 444                        if (!np)
 445                                np = cp + strlen(cp);
 446                        if (pass) {
 447                                lrr_list[i].line = cp;
 448                                lrr_list[i].name = cp + 41;
 449                                lrr_list[i].namelen = np - (cp + 41);
 450                        }
 451                        i++;
 452                        cp = np;
 453                }
 454                if (!pass) {
 455                        lrr_count = i;
 456                        lrr_list = xcalloc(lrr_count, sizeof(*lrr_list));
 457                }
 458        }
 459
 460        while (1) {
 461                const char *next;
 462                int rreflen;
 463                int i;
 464
 465                while (*rref && isspace(*rref))
 466                        rref++;
 467                if (!*rref)
 468                        break;
 469                next = strchr(rref, '\n');
 470                if (!next)
 471                        next = rref + strlen(rref);
 472                rreflen = next - rref;
 473
 474                for (i = 0; i < lrr_count; i++) {
 475                        struct lrr *lrr = &(lrr_list[i]);
 476
 477                        if (rreflen == lrr->namelen &&
 478                            !memcmp(lrr->name, rref, rreflen)) {
 479                                if (!lrr->shown)
 480                                        printf("%.*s\n",
 481                                               sha1_only ? 40 : lrr->namelen + 41,
 482                                               lrr->line);
 483                                lrr->shown = 1;
 484                                break;
 485                        }
 486                }
 487                if (lrr_count <= i) {
 488                        error("pick-rref: %.*s not found", rreflen, rref);
 489                        err = 1;
 490                }
 491                rref = next;
 492        }
 493        free(lrr_list);
 494        return err;
 495}
 496
 497int cmd_fetch__tool(int argc, const char **argv, const char *prefix)
 498{
 499        int verbose = 0;
 500        int force = 0;
 501        int sopt = 0;
 502
 503        while (1 < argc) {
 504                const char *arg = argv[1];
 505                if (!strcmp("-v", arg))
 506                        verbose = 1;
 507                else if (!strcmp("-f", arg))
 508                        force = 1;
 509                else if (!strcmp("-s", arg))
 510                        sopt = 1;
 511                else
 512                        break;
 513                argc--;
 514                argv++;
 515        }
 516
 517        if (argc <= 1)
 518                return error("Missing subcommand");
 519
 520        if (!strcmp("append-fetch-head", argv[1])) {
 521                int result;
 522                FILE *fp;
 523
 524                if (argc != 8)
 525                        return error("append-fetch-head takes 6 args");
 526                fp = fopen(git_path("FETCH_HEAD"), "a");
 527                result = append_fetch_head(fp, argv[2], argv[3],
 528                                           argv[4], argv[5],
 529                                           argv[6], !!argv[7][0],
 530                                           verbose, force);
 531                fclose(fp);
 532                return result;
 533        }
 534        if (!strcmp("native-store", argv[1])) {
 535                int result;
 536                FILE *fp;
 537
 538                if (argc != 5)
 539                        return error("fetch-native-store takes 3 args");
 540                fp = fopen(git_path("FETCH_HEAD"), "a");
 541                result = fetch_native_store(fp, argv[2], argv[3], argv[4],
 542                                            verbose, force);
 543                fclose(fp);
 544                return result;
 545        }
 546        if (!strcmp("parse-reflist", argv[1])) {
 547                const char *reflist;
 548                if (argc != 3)
 549                        return error("parse-reflist takes 1 arg");
 550                reflist = argv[2];
 551                if (!strcmp(reflist, "-"))
 552                        reflist = get_stdin();
 553                return parse_reflist(reflist);
 554        }
 555        if (!strcmp("pick-rref", argv[1])) {
 556                const char *ls_remote_result;
 557                if (argc != 4)
 558                        return error("pick-rref takes 2 args");
 559                ls_remote_result = argv[3];
 560                if (!strcmp(ls_remote_result, "-"))
 561                        ls_remote_result = get_stdin();
 562                return pick_rref(sopt, argv[2], ls_remote_result);
 563        }
 564        if (!strcmp("expand-refs-wildcard", argv[1])) {
 565                const char *reflist;
 566                if (argc < 4)
 567                        return error("expand-refs-wildcard takes at least 2 args");
 568                reflist = argv[2];
 569                if (!strcmp(reflist, "-"))
 570                        reflist = get_stdin();
 571                return expand_refs_wildcard(reflist, argc - 3, argv + 3);
 572        }
 573
 574        return error("Unknown subcommand: %s", argv[1]);
 575}