convert.con commit Merge branch 'maint' (8ac8cf5)
   1#include "cache.h"
   2#include "attr.h"
   3#include "run-command.h"
   4
   5/*
   6 * convert.c - convert a file when checking it out and checking it in.
   7 *
   8 * This should use the pathname to decide on whether it wants to do some
   9 * more interesting conversions (automatic gzip/unzip, general format
  10 * conversions etc etc), but by default it just does automatic CRLF<->LF
  11 * translation when the "text" attribute or "auto_crlf" option is set.
  12 */
  13
  14enum action {
  15        CRLF_GUESS = -1,
  16        CRLF_BINARY = 0,
  17        CRLF_TEXT,
  18        CRLF_INPUT,
  19        CRLF_CRLF,
  20        CRLF_AUTO,
  21};
  22
  23struct text_stat {
  24        /* NUL, CR, LF and CRLF counts */
  25        unsigned nul, cr, lf, crlf;
  26
  27        /* These are just approximations! */
  28        unsigned printable, nonprintable;
  29};
  30
  31static void gather_stats(const char *buf, unsigned long size, struct text_stat *stats)
  32{
  33        unsigned long i;
  34
  35        memset(stats, 0, sizeof(*stats));
  36
  37        for (i = 0; i < size; i++) {
  38                unsigned char c = buf[i];
  39                if (c == '\r') {
  40                        stats->cr++;
  41                        if (i+1 < size && buf[i+1] == '\n')
  42                                stats->crlf++;
  43                        continue;
  44                }
  45                if (c == '\n') {
  46                        stats->lf++;
  47                        continue;
  48                }
  49                if (c == 127)
  50                        /* DEL */
  51                        stats->nonprintable++;
  52                else if (c < 32) {
  53                        switch (c) {
  54                                /* BS, HT, ESC and FF */
  55                        case '\b': case '\t': case '\033': case '\014':
  56                                stats->printable++;
  57                                break;
  58                        case 0:
  59                                stats->nul++;
  60                                /* fall through */
  61                        default:
  62                                stats->nonprintable++;
  63                        }
  64                }
  65                else
  66                        stats->printable++;
  67        }
  68
  69        /* If file ends with EOF then don't count this EOF as non-printable. */
  70        if (size >= 1 && buf[size-1] == '\032')
  71                stats->nonprintable--;
  72}
  73
  74/*
  75 * The same heuristics as diff.c::mmfile_is_binary()
  76 */
  77static int is_binary(unsigned long size, struct text_stat *stats)
  78{
  79
  80        if (stats->nul)
  81                return 1;
  82        if ((stats->printable >> 7) < stats->nonprintable)
  83                return 1;
  84        /*
  85         * Other heuristics? Average line length might be relevant,
  86         * as might LF vs CR vs CRLF counts..
  87         *
  88         * NOTE! It might be normal to have a low ratio of CRLF to LF
  89         * (somebody starts with a LF-only file and edits it with an editor
  90         * that adds CRLF only to lines that are added..). But do  we
  91         * want to support CR-only? Probably not.
  92         */
  93        return 0;
  94}
  95
  96static enum eol determine_output_conversion(enum action action)
  97{
  98        switch (action) {
  99        case CRLF_BINARY:
 100                return EOL_UNSET;
 101        case CRLF_CRLF:
 102                return EOL_CRLF;
 103        case CRLF_INPUT:
 104                return EOL_LF;
 105        case CRLF_GUESS:
 106                if (!auto_crlf)
 107                        return EOL_UNSET;
 108                /* fall through */
 109        case CRLF_TEXT:
 110        case CRLF_AUTO:
 111                if (auto_crlf == AUTO_CRLF_TRUE)
 112                        return EOL_CRLF;
 113                else if (auto_crlf == AUTO_CRLF_INPUT)
 114                        return EOL_LF;
 115                else if (eol == EOL_UNSET)
 116                        return EOL_NATIVE;
 117        }
 118        return eol;
 119}
 120
 121static void check_safe_crlf(const char *path, enum action action,
 122                            struct text_stat *stats, enum safe_crlf checksafe)
 123{
 124        if (!checksafe)
 125                return;
 126
 127        if (determine_output_conversion(action) == EOL_LF) {
 128                /*
 129                 * CRLFs would not be restored by checkout:
 130                 * check if we'd remove CRLFs
 131                 */
 132                if (stats->crlf) {
 133                        if (checksafe == SAFE_CRLF_WARN)
 134                                warning("CRLF will be replaced by LF in %s.\nThe file will have its original line endings in your working directory.", path);
 135                        else /* i.e. SAFE_CRLF_FAIL */
 136                                die("CRLF would be replaced by LF in %s.", path);
 137                }
 138        } else if (determine_output_conversion(action) == EOL_CRLF) {
 139                /*
 140                 * CRLFs would be added by checkout:
 141                 * check if we have "naked" LFs
 142                 */
 143                if (stats->lf != stats->crlf) {
 144                        if (checksafe == SAFE_CRLF_WARN)
 145                                warning("LF will be replaced by CRLF in %s.\nThe file will have its original line endings in your working directory.", path);
 146                        else /* i.e. SAFE_CRLF_FAIL */
 147                                die("LF would be replaced by CRLF in %s", path);
 148                }
 149        }
 150}
 151
 152static int has_cr_in_index(const char *path)
 153{
 154        int pos, len;
 155        unsigned long sz;
 156        enum object_type type;
 157        void *data;
 158        int has_cr;
 159        struct index_state *istate = &the_index;
 160
 161        len = strlen(path);
 162        pos = index_name_pos(istate, path, len);
 163        if (pos < 0) {
 164                /*
 165                 * We might be in the middle of a merge, in which
 166                 * case we would read stage #2 (ours).
 167                 */
 168                int i;
 169                for (i = -pos - 1;
 170                     (pos < 0 && i < istate->cache_nr &&
 171                      !strcmp(istate->cache[i]->name, path));
 172                     i++)
 173                        if (ce_stage(istate->cache[i]) == 2)
 174                                pos = i;
 175        }
 176        if (pos < 0)
 177                return 0;
 178        data = read_sha1_file(istate->cache[pos]->sha1, &type, &sz);
 179        if (!data || type != OBJ_BLOB) {
 180                free(data);
 181                return 0;
 182        }
 183
 184        has_cr = memchr(data, '\r', sz) != NULL;
 185        free(data);
 186        return has_cr;
 187}
 188
 189static int crlf_to_git(const char *path, const char *src, size_t len,
 190                       struct strbuf *buf, enum action action, enum safe_crlf checksafe)
 191{
 192        struct text_stat stats;
 193        char *dst;
 194
 195        if (action == CRLF_BINARY ||
 196            (action == CRLF_GUESS && auto_crlf == AUTO_CRLF_FALSE) || !len)
 197                return 0;
 198
 199        gather_stats(src, len, &stats);
 200
 201        if (action == CRLF_AUTO || action == CRLF_GUESS) {
 202                /*
 203                 * We're currently not going to even try to convert stuff
 204                 * that has bare CR characters. Does anybody do that crazy
 205                 * stuff?
 206                 */
 207                if (stats.cr != stats.crlf)
 208                        return 0;
 209
 210                /*
 211                 * And add some heuristics for binary vs text, of course...
 212                 */
 213                if (is_binary(len, &stats))
 214                        return 0;
 215
 216                if (action == CRLF_GUESS) {
 217                        /*
 218                         * If the file in the index has any CR in it, do not convert.
 219                         * This is the new safer autocrlf handling.
 220                         */
 221                        if (has_cr_in_index(path))
 222                                return 0;
 223                }
 224        }
 225
 226        check_safe_crlf(path, action, &stats, checksafe);
 227
 228        /* Optimization: No CR? Nothing to convert, regardless. */
 229        if (!stats.cr)
 230                return 0;
 231
 232        /* only grow if not in place */
 233        if (strbuf_avail(buf) + buf->len < len)
 234                strbuf_grow(buf, len - buf->len);
 235        dst = buf->buf;
 236        if (action == CRLF_AUTO || action == CRLF_GUESS) {
 237                /*
 238                 * If we guessed, we already know we rejected a file with
 239                 * lone CR, and we can strip a CR without looking at what
 240                 * follow it.
 241                 */
 242                do {
 243                        unsigned char c = *src++;
 244                        if (c != '\r')
 245                                *dst++ = c;
 246                } while (--len);
 247        } else {
 248                do {
 249                        unsigned char c = *src++;
 250                        if (! (c == '\r' && (1 < len && *src == '\n')))
 251                                *dst++ = c;
 252                } while (--len);
 253        }
 254        strbuf_setlen(buf, dst - buf->buf);
 255        return 1;
 256}
 257
 258static int crlf_to_worktree(const char *path, const char *src, size_t len,
 259                            struct strbuf *buf, enum action action)
 260{
 261        char *to_free = NULL;
 262        struct text_stat stats;
 263
 264        if (!len || determine_output_conversion(action) != EOL_CRLF)
 265                return 0;
 266
 267        gather_stats(src, len, &stats);
 268
 269        /* No LF? Nothing to convert, regardless. */
 270        if (!stats.lf)
 271                return 0;
 272
 273        /* Was it already in CRLF format? */
 274        if (stats.lf == stats.crlf)
 275                return 0;
 276
 277        if (action == CRLF_AUTO || action == CRLF_GUESS) {
 278                if (action == CRLF_GUESS) {
 279                        /* If we have any CR or CRLF line endings, we do not touch it */
 280                        /* This is the new safer autocrlf-handling */
 281                        if (stats.cr > 0 || stats.crlf > 0)
 282                                return 0;
 283                }
 284
 285                /* If we have any bare CR characters, we're not going to touch it */
 286                if (stats.cr != stats.crlf)
 287                        return 0;
 288
 289                if (is_binary(len, &stats))
 290                        return 0;
 291        }
 292
 293        /* are we "faking" in place editing ? */
 294        if (src == buf->buf)
 295                to_free = strbuf_detach(buf, NULL);
 296
 297        strbuf_grow(buf, len + stats.lf - stats.crlf);
 298        for (;;) {
 299                const char *nl = memchr(src, '\n', len);
 300                if (!nl)
 301                        break;
 302                if (nl > src && nl[-1] == '\r') {
 303                        strbuf_add(buf, src, nl + 1 - src);
 304                } else {
 305                        strbuf_add(buf, src, nl - src);
 306                        strbuf_addstr(buf, "\r\n");
 307                }
 308                len -= nl + 1 - src;
 309                src  = nl + 1;
 310        }
 311        strbuf_add(buf, src, len);
 312
 313        free(to_free);
 314        return 1;
 315}
 316
 317struct filter_params {
 318        const char *src;
 319        unsigned long size;
 320        const char *cmd;
 321};
 322
 323static int filter_buffer(int in, int out, void *data)
 324{
 325        /*
 326         * Spawn cmd and feed the buffer contents through its stdin.
 327         */
 328        struct child_process child_process;
 329        struct filter_params *params = (struct filter_params *)data;
 330        int write_err, status;
 331        const char *argv[] = { NULL, NULL };
 332
 333        argv[0] = params->cmd;
 334
 335        memset(&child_process, 0, sizeof(child_process));
 336        child_process.argv = argv;
 337        child_process.use_shell = 1;
 338        child_process.in = -1;
 339        child_process.out = out;
 340
 341        if (start_command(&child_process))
 342                return error("cannot fork to run external filter %s", params->cmd);
 343
 344        write_err = (write_in_full(child_process.in, params->src, params->size) < 0);
 345        if (close(child_process.in))
 346                write_err = 1;
 347        if (write_err)
 348                error("cannot feed the input to external filter %s", params->cmd);
 349
 350        status = finish_command(&child_process);
 351        if (status)
 352                error("external filter %s failed %d", params->cmd, status);
 353        return (write_err || status);
 354}
 355
 356static int apply_filter(const char *path, const char *src, size_t len,
 357                        struct strbuf *dst, const char *cmd)
 358{
 359        /*
 360         * Create a pipeline to have the command filter the buffer's
 361         * contents.
 362         *
 363         * (child --> cmd) --> us
 364         */
 365        int ret = 1;
 366        struct strbuf nbuf = STRBUF_INIT;
 367        struct async async;
 368        struct filter_params params;
 369
 370        if (!cmd)
 371                return 0;
 372
 373        memset(&async, 0, sizeof(async));
 374        async.proc = filter_buffer;
 375        async.data = &params;
 376        async.out = -1;
 377        params.src = src;
 378        params.size = len;
 379        params.cmd = cmd;
 380
 381        fflush(NULL);
 382        if (start_async(&async))
 383                return 0;       /* error was already reported */
 384
 385        if (strbuf_read(&nbuf, async.out, len) < 0) {
 386                error("read from external filter %s failed", cmd);
 387                ret = 0;
 388        }
 389        if (close(async.out)) {
 390                error("read from external filter %s failed", cmd);
 391                ret = 0;
 392        }
 393        if (finish_async(&async)) {
 394                error("external filter %s failed", cmd);
 395                ret = 0;
 396        }
 397
 398        if (ret) {
 399                strbuf_swap(dst, &nbuf);
 400        }
 401        strbuf_release(&nbuf);
 402        return ret;
 403}
 404
 405static struct convert_driver {
 406        const char *name;
 407        struct convert_driver *next;
 408        const char *smudge;
 409        const char *clean;
 410} *user_convert, **user_convert_tail;
 411
 412static int read_convert_config(const char *var, const char *value, void *cb)
 413{
 414        const char *ep, *name;
 415        int namelen;
 416        struct convert_driver *drv;
 417
 418        /*
 419         * External conversion drivers are configured using
 420         * "filter.<name>.variable".
 421         */
 422        if (prefixcmp(var, "filter.") || (ep = strrchr(var, '.')) == var + 6)
 423                return 0;
 424        name = var + 7;
 425        namelen = ep - name;
 426        for (drv = user_convert; drv; drv = drv->next)
 427                if (!strncmp(drv->name, name, namelen) && !drv->name[namelen])
 428                        break;
 429        if (!drv) {
 430                drv = xcalloc(1, sizeof(struct convert_driver));
 431                drv->name = xmemdupz(name, namelen);
 432                *user_convert_tail = drv;
 433                user_convert_tail = &(drv->next);
 434        }
 435
 436        ep++;
 437
 438        /*
 439         * filter.<name>.smudge and filter.<name>.clean specifies
 440         * the command line:
 441         *
 442         *      command-line
 443         *
 444         * The command-line will not be interpolated in any way.
 445         */
 446
 447        if (!strcmp("smudge", ep))
 448                return git_config_string(&drv->smudge, var, value);
 449
 450        if (!strcmp("clean", ep))
 451                return git_config_string(&drv->clean, var, value);
 452
 453        return 0;
 454}
 455
 456static void setup_convert_check(struct git_attr_check *check)
 457{
 458        static struct git_attr *attr_text;
 459        static struct git_attr *attr_crlf;
 460        static struct git_attr *attr_eol;
 461        static struct git_attr *attr_ident;
 462        static struct git_attr *attr_filter;
 463
 464        if (!attr_text) {
 465                attr_text = git_attr("text");
 466                attr_crlf = git_attr("crlf");
 467                attr_eol = git_attr("eol");
 468                attr_ident = git_attr("ident");
 469                attr_filter = git_attr("filter");
 470                user_convert_tail = &user_convert;
 471                git_config(read_convert_config, NULL);
 472        }
 473        check[0].attr = attr_crlf;
 474        check[1].attr = attr_ident;
 475        check[2].attr = attr_filter;
 476        check[3].attr = attr_eol;
 477        check[4].attr = attr_text;
 478}
 479
 480static int count_ident(const char *cp, unsigned long size)
 481{
 482        /*
 483         * "$Id: 0000000000000000000000000000000000000000 $" <=> "$Id$"
 484         */
 485        int cnt = 0;
 486        char ch;
 487
 488        while (size) {
 489                ch = *cp++;
 490                size--;
 491                if (ch != '$')
 492                        continue;
 493                if (size < 3)
 494                        break;
 495                if (memcmp("Id", cp, 2))
 496                        continue;
 497                ch = cp[2];
 498                cp += 3;
 499                size -= 3;
 500                if (ch == '$')
 501                        cnt++; /* $Id$ */
 502                if (ch != ':')
 503                        continue;
 504
 505                /*
 506                 * "$Id: ... "; scan up to the closing dollar sign and discard.
 507                 */
 508                while (size) {
 509                        ch = *cp++;
 510                        size--;
 511                        if (ch == '$') {
 512                                cnt++;
 513                                break;
 514                        }
 515                        if (ch == '\n')
 516                                break;
 517                }
 518        }
 519        return cnt;
 520}
 521
 522static int ident_to_git(const char *path, const char *src, size_t len,
 523                        struct strbuf *buf, int ident)
 524{
 525        char *dst, *dollar;
 526
 527        if (!ident || !count_ident(src, len))
 528                return 0;
 529
 530        /* only grow if not in place */
 531        if (strbuf_avail(buf) + buf->len < len)
 532                strbuf_grow(buf, len - buf->len);
 533        dst = buf->buf;
 534        for (;;) {
 535                dollar = memchr(src, '$', len);
 536                if (!dollar)
 537                        break;
 538                memcpy(dst, src, dollar + 1 - src);
 539                dst += dollar + 1 - src;
 540                len -= dollar + 1 - src;
 541                src  = dollar + 1;
 542
 543                if (len > 3 && !memcmp(src, "Id:", 3)) {
 544                        dollar = memchr(src + 3, '$', len - 3);
 545                        if (!dollar)
 546                                break;
 547                        if (memchr(src + 3, '\n', dollar - src - 3)) {
 548                                /* Line break before the next dollar. */
 549                                continue;
 550                        }
 551
 552                        memcpy(dst, "Id$", 3);
 553                        dst += 3;
 554                        len -= dollar + 1 - src;
 555                        src  = dollar + 1;
 556                }
 557        }
 558        memcpy(dst, src, len);
 559        strbuf_setlen(buf, dst + len - buf->buf);
 560        return 1;
 561}
 562
 563static int ident_to_worktree(const char *path, const char *src, size_t len,
 564                             struct strbuf *buf, int ident)
 565{
 566        unsigned char sha1[20];
 567        char *to_free = NULL, *dollar, *spc;
 568        int cnt;
 569
 570        if (!ident)
 571                return 0;
 572
 573        cnt = count_ident(src, len);
 574        if (!cnt)
 575                return 0;
 576
 577        /* are we "faking" in place editing ? */
 578        if (src == buf->buf)
 579                to_free = strbuf_detach(buf, NULL);
 580        hash_sha1_file(src, len, "blob", sha1);
 581
 582        strbuf_grow(buf, len + cnt * 43);
 583        for (;;) {
 584                /* step 1: run to the next '$' */
 585                dollar = memchr(src, '$', len);
 586                if (!dollar)
 587                        break;
 588                strbuf_add(buf, src, dollar + 1 - src);
 589                len -= dollar + 1 - src;
 590                src  = dollar + 1;
 591
 592                /* step 2: does it looks like a bit like Id:xxx$ or Id$ ? */
 593                if (len < 3 || memcmp("Id", src, 2))
 594                        continue;
 595
 596                /* step 3: skip over Id$ or Id:xxxxx$ */
 597                if (src[2] == '$') {
 598                        src += 3;
 599                        len -= 3;
 600                } else if (src[2] == ':') {
 601                        /*
 602                         * It's possible that an expanded Id has crept its way into the
 603                         * repository, we cope with that by stripping the expansion out.
 604                         * This is probably not a good idea, since it will cause changes
 605                         * on checkout, which won't go away by stash, but let's keep it
 606                         * for git-style ids.
 607                         */
 608                        dollar = memchr(src + 3, '$', len - 3);
 609                        if (!dollar) {
 610                                /* incomplete keyword, no more '$', so just quit the loop */
 611                                break;
 612                        }
 613
 614                        if (memchr(src + 3, '\n', dollar - src - 3)) {
 615                                /* Line break before the next dollar. */
 616                                continue;
 617                        }
 618
 619                        spc = memchr(src + 4, ' ', dollar - src - 4);
 620                        if (spc && spc < dollar-1) {
 621                                /* There are spaces in unexpected places.
 622                                 * This is probably an id from some other
 623                                 * versioning system. Keep it for now.
 624                                 */
 625                                continue;
 626                        }
 627
 628                        len -= dollar + 1 - src;
 629                        src  = dollar + 1;
 630                } else {
 631                        /* it wasn't a "Id$" or "Id:xxxx$" */
 632                        continue;
 633                }
 634
 635                /* step 4: substitute */
 636                strbuf_addstr(buf, "Id: ");
 637                strbuf_add(buf, sha1_to_hex(sha1), 40);
 638                strbuf_addstr(buf, " $");
 639        }
 640        strbuf_add(buf, src, len);
 641
 642        free(to_free);
 643        return 1;
 644}
 645
 646static int git_path_check_crlf(const char *path, struct git_attr_check *check)
 647{
 648        const char *value = check->value;
 649
 650        if (ATTR_TRUE(value))
 651                return CRLF_TEXT;
 652        else if (ATTR_FALSE(value))
 653                return CRLF_BINARY;
 654        else if (ATTR_UNSET(value))
 655                ;
 656        else if (!strcmp(value, "input"))
 657                return CRLF_INPUT;
 658        else if (!strcmp(value, "auto"))
 659                return CRLF_AUTO;
 660        return CRLF_GUESS;
 661}
 662
 663static int git_path_check_eol(const char *path, struct git_attr_check *check)
 664{
 665        const char *value = check->value;
 666
 667        if (ATTR_UNSET(value))
 668                ;
 669        else if (!strcmp(value, "lf"))
 670                return EOL_LF;
 671        else if (!strcmp(value, "crlf"))
 672                return EOL_CRLF;
 673        return EOL_UNSET;
 674}
 675
 676static struct convert_driver *git_path_check_convert(const char *path,
 677                                             struct git_attr_check *check)
 678{
 679        const char *value = check->value;
 680        struct convert_driver *drv;
 681
 682        if (ATTR_TRUE(value) || ATTR_FALSE(value) || ATTR_UNSET(value))
 683                return NULL;
 684        for (drv = user_convert; drv; drv = drv->next)
 685                if (!strcmp(value, drv->name))
 686                        return drv;
 687        return NULL;
 688}
 689
 690static int git_path_check_ident(const char *path, struct git_attr_check *check)
 691{
 692        const char *value = check->value;
 693
 694        return !!ATTR_TRUE(value);
 695}
 696
 697static enum action determine_action(enum action text_attr, enum eol eol_attr)
 698{
 699        if (text_attr == CRLF_BINARY)
 700                return CRLF_BINARY;
 701        if (eol_attr == EOL_LF)
 702                return CRLF_INPUT;
 703        if (eol_attr == EOL_CRLF)
 704                return CRLF_CRLF;
 705        return text_attr;
 706}
 707
 708int convert_to_git(const char *path, const char *src, size_t len,
 709                   struct strbuf *dst, enum safe_crlf checksafe)
 710{
 711        struct git_attr_check check[5];
 712        enum action action = CRLF_GUESS;
 713        enum eol eol_attr = EOL_UNSET;
 714        int ident = 0, ret = 0;
 715        const char *filter = NULL;
 716
 717        setup_convert_check(check);
 718        if (!git_checkattr(path, ARRAY_SIZE(check), check)) {
 719                struct convert_driver *drv;
 720                action = git_path_check_crlf(path, check + 4);
 721                if (action == CRLF_GUESS)
 722                        action = git_path_check_crlf(path, check + 0);
 723                ident = git_path_check_ident(path, check + 1);
 724                drv = git_path_check_convert(path, check + 2);
 725                eol_attr = git_path_check_eol(path, check + 3);
 726                if (drv && drv->clean)
 727                        filter = drv->clean;
 728        }
 729
 730        ret |= apply_filter(path, src, len, dst, filter);
 731        if (ret) {
 732                src = dst->buf;
 733                len = dst->len;
 734        }
 735        action = determine_action(action, eol_attr);
 736        ret |= crlf_to_git(path, src, len, dst, action, checksafe);
 737        if (ret) {
 738                src = dst->buf;
 739                len = dst->len;
 740        }
 741        return ret | ident_to_git(path, src, len, dst, ident);
 742}
 743
 744static int convert_to_working_tree_internal(const char *path, const char *src,
 745                                            size_t len, struct strbuf *dst,
 746                                            int normalizing)
 747{
 748        struct git_attr_check check[5];
 749        enum action action = CRLF_GUESS;
 750        enum eol eol_attr = EOL_UNSET;
 751        int ident = 0, ret = 0;
 752        const char *filter = NULL;
 753
 754        setup_convert_check(check);
 755        if (!git_checkattr(path, ARRAY_SIZE(check), check)) {
 756                struct convert_driver *drv;
 757                action = git_path_check_crlf(path, check + 4);
 758                if (action == CRLF_GUESS)
 759                        action = git_path_check_crlf(path, check + 0);
 760                ident = git_path_check_ident(path, check + 1);
 761                drv = git_path_check_convert(path, check + 2);
 762                eol_attr = git_path_check_eol(path, check + 3);
 763                if (drv && drv->smudge)
 764                        filter = drv->smudge;
 765        }
 766
 767        ret |= ident_to_worktree(path, src, len, dst, ident);
 768        if (ret) {
 769                src = dst->buf;
 770                len = dst->len;
 771        }
 772        /*
 773         * CRLF conversion can be skipped if normalizing, unless there
 774         * is a smudge filter.  The filter might expect CRLFs.
 775         */
 776        if (filter || !normalizing) {
 777                action = determine_action(action, eol_attr);
 778                ret |= crlf_to_worktree(path, src, len, dst, action);
 779                if (ret) {
 780                        src = dst->buf;
 781                        len = dst->len;
 782                }
 783        }
 784        return ret | apply_filter(path, src, len, dst, filter);
 785}
 786
 787int convert_to_working_tree(const char *path, const char *src, size_t len, struct strbuf *dst)
 788{
 789        return convert_to_working_tree_internal(path, src, len, dst, 0);
 790}
 791
 792int renormalize_buffer(const char *path, const char *src, size_t len, struct strbuf *dst)
 793{
 794        int ret = convert_to_working_tree_internal(path, src, len, dst, 1);
 795        if (ret) {
 796                src = dst->buf;
 797                len = dst->len;
 798        }
 799        return ret | convert_to_git(path, src, len, dst, 0);
 800}