Andrew's git - gitweb.git/blob

   1#include "cache.h"
   2#include "dir.h"
   3
   4static int inside_git_dir = -1;
   5static int inside_work_tree = -1;
   6
   7char *prefix_path(const char *prefix, int len, const char *path)
   8{
   9        const char *orig = path;
  10        char *sanitized;
  11        if (is_absolute_path(orig)) {
  12                const char *temp = real_path(path);
  13                sanitized = xmalloc(len + strlen(temp) + 1);
  14                strcpy(sanitized, temp);
  15        } else {
  16                sanitized = xmalloc(len + strlen(path) + 1);
  17                if (len)
  18                        memcpy(sanitized, prefix, len);
  19                strcpy(sanitized + len, path);
  20        }
  21        if (normalize_path_copy(sanitized, sanitized))
  22                goto error_out;
  23        if (is_absolute_path(orig)) {
  24                size_t root_len, len, total;
  25                const char *work_tree = get_git_work_tree();
  26                if (!work_tree)
  27                        goto error_out;
  28                len = strlen(work_tree);
  29                root_len = offset_1st_component(work_tree);
  30                total = strlen(sanitized) + 1;
  31                if (strncmp(sanitized, work_tree, len) ||
  32                    (len > root_len && sanitized[len] != '\0' && sanitized[len] != '/')) {
  33                error_out:
  34                        die("'%s' is outside repository", orig);
  35                }
  36                if (sanitized[len] == '/')
  37                        len++;
  38                memmove(sanitized, sanitized + len, total - len);
  39        }
  40        return sanitized;
  41}
  42
  43/*
  44 * Unlike prefix_path, this should be used if the named file does
  45 * not have to interact with index entry; i.e. name of a random file
  46 * on the filesystem.
  47 */
  48const char *prefix_filename(const char *pfx, int pfx_len, const char *arg)
  49{
  50        static char path[PATH_MAX];
  51#ifndef WIN32
  52        if (!pfx_len || is_absolute_path(arg))
  53                return arg;
  54        memcpy(path, pfx, pfx_len);
  55        strcpy(path + pfx_len, arg);
  56#else
  57        char *p;
  58        /* don't add prefix to absolute paths, but still replace '\' by '/' */
  59        if (is_absolute_path(arg))
  60                pfx_len = 0;
  61        else if (pfx_len)
  62                memcpy(path, pfx, pfx_len);
  63        strcpy(path + pfx_len, arg);
  64        for (p = path + pfx_len; *p; p++)
  65                if (*p == '\\')
  66                        *p = '/';
  67#endif
  68        return path;
  69}
  70
  71int check_filename(const char *prefix, const char *arg)
  72{
  73        const char *name;
  74        struct stat st;
  75
  76        name = prefix ? prefix_filename(prefix, strlen(prefix), arg) : arg;
  77        if (!lstat(name, &st))
  78                return 1; /* file exists */
  79        if (errno == ENOENT || errno == ENOTDIR)
  80                return 0; /* file does not exist */
  81        die_errno("failed to stat '%s'", arg);
  82}
  83
  84static void NORETURN die_verify_filename(const char *prefix, const char *arg)
  85{
  86        unsigned char sha1[20];
  87        unsigned mode;
  88        /* try a detailed diagnostic ... */
  89        get_sha1_with_mode_1(arg, sha1, &mode, 0, prefix);
  90        /* ... or fall back the most general message. */
  91        die("ambiguous argument '%s': unknown revision or path not in the working tree.\n"
  92            "Use '--' to separate paths from revisions", arg);
  93
  94}
  95
  96/*
  97 * Verify a filename that we got as an argument for a pathspec
  98 * entry. Note that a filename that begins with "-" never verifies
  99 * as true, because even if such a filename were to exist, we want
 100 * it to be preceded by the "--" marker (or we want the user to
 101 * use a format like "./-filename")
 102 */
 103void verify_filename(const char *prefix, const char *arg)
 104{
 105        if (*arg == '-')
 106                die("bad flag '%s' used after filename", arg);
 107        if (check_filename(prefix, arg))
 108                return;
 109        die_verify_filename(prefix, arg);
 110}
 111
 112/*
 113 * Opposite of the above: the command line did not have -- marker
 114 * and we parsed the arg as a refname.  It should not be interpretable
 115 * as a filename.
 116 */
 117void verify_non_filename(const char *prefix, const char *arg)
 118{
 119        if (!is_inside_work_tree() || is_inside_git_dir())
 120                return;
 121        if (*arg == '-')
 122                return; /* flag */
 123        if (!check_filename(prefix, arg))
 124                return;
 125        die("ambiguous argument '%s': both revision and filename\n"
 126            "Use '--' to separate filenames from revisions", arg);
 127}
 128
 129const char **get_pathspec(const char *prefix, const char **pathspec)
 130{
 131        const char *entry = *pathspec;
 132        const char **src, **dst;
 133        int prefixlen;
 134
 135        if (!prefix && !entry)
 136                return NULL;
 137
 138        if (!entry) {
 139                static const char *spec[2];
 140                spec[0] = prefix;
 141                spec[1] = NULL;
 142                return spec;
 143        }
 144
 145        /* Otherwise we have to re-write the entries.. */
 146        src = pathspec;
 147        dst = pathspec;
 148        prefixlen = prefix ? strlen(prefix) : 0;
 149        while (*src) {
 150                const char *p = prefix_path(prefix, prefixlen, *src);
 151                *(dst++) = p;
 152                src++;
 153        }
 154        *dst = NULL;
 155        if (!*pathspec)
 156                return NULL;
 157        return pathspec;
 158}
 159
 160/*
 161 * Test if it looks like we're at a git directory.
 162 * We want to see:
 163 *
 164 *  - either an objects/ directory _or_ the proper
 165 *    GIT_OBJECT_DIRECTORY environment variable
 166 *  - a refs/ directory
 167 *  - either a HEAD symlink or a HEAD file that is formatted as
 168 *    a proper "ref:", or a regular file HEAD that has a properly
 169 *    formatted sha1 object name.
 170 */
 171static int is_git_directory(const char *suspect)
 172{
 173        char path[PATH_MAX];
 174        size_t len = strlen(suspect);
 175
 176        if (PATH_MAX <= len + strlen("/objects"))
 177                die("Too long path: %.*s", 60, suspect);
 178        strcpy(path, suspect);
 179        if (getenv(DB_ENVIRONMENT)) {
 180                if (access(getenv(DB_ENVIRONMENT), X_OK))
 181                        return 0;
 182        }
 183        else {
 184                strcpy(path + len, "/objects");
 185                if (access(path, X_OK))
 186                        return 0;
 187        }
 188
 189        strcpy(path + len, "/refs");
 190        if (access(path, X_OK))
 191                return 0;
 192
 193        strcpy(path + len, "/HEAD");
 194        if (validate_headref(path))
 195                return 0;
 196
 197        return 1;
 198}
 199
 200int is_inside_git_dir(void)
 201{
 202        if (inside_git_dir < 0)
 203                inside_git_dir = is_inside_dir(get_git_dir());
 204        return inside_git_dir;
 205}
 206
 207int is_inside_work_tree(void)
 208{
 209        if (inside_work_tree < 0)
 210                inside_work_tree = is_inside_dir(get_git_work_tree());
 211        return inside_work_tree;
 212}
 213
 214void setup_work_tree(void)
 215{
 216        const char *work_tree, *git_dir;
 217        static int initialized = 0;
 218
 219        if (initialized)
 220                return;
 221        work_tree = get_git_work_tree();
 222        git_dir = get_git_dir();
 223        if (!is_absolute_path(git_dir))
 224                git_dir = real_path(get_git_dir());
 225        if (!work_tree || chdir(work_tree))
 226                die("This operation must be run in a work tree");
 227
 228        /*
 229         * Make sure subsequent git processes find correct worktree
 230         * if $GIT_WORK_TREE is set relative
 231         */
 232        if (getenv(GIT_WORK_TREE_ENVIRONMENT))
 233                setenv(GIT_WORK_TREE_ENVIRONMENT, ".", 1);
 234
 235        set_git_dir(relative_path(git_dir, work_tree));
 236        initialized = 1;
 237}
 238
 239static int check_repository_format_gently(const char *gitdir, int *nongit_ok)
 240{
 241        char repo_config[PATH_MAX+1];
 242
 243        /*
 244         * git_config() can't be used here because it calls git_pathdup()
 245         * to get $GIT_CONFIG/config. That call will make setup_git_env()
 246         * set git_dir to ".git".
 247         *
 248         * We are in gitdir setup, no git dir has been found useable yet.
 249         * Use a gentler version of git_config() to check if this repo
 250         * is a good one.
 251         */
 252        snprintf(repo_config, PATH_MAX, "%s/config", gitdir);
 253        git_config_early(check_repository_format_version, NULL, repo_config);
 254        if (GIT_REPO_VERSION < repository_format_version) {
 255                if (!nongit_ok)
 256                        die ("Expected git repo version <= %d, found %d",
 257                             GIT_REPO_VERSION, repository_format_version);
 258                warning("Expected git repo version <= %d, found %d",
 259                        GIT_REPO_VERSION, repository_format_version);
 260                warning("Please upgrade Git");
 261                *nongit_ok = -1;
 262                return -1;
 263        }
 264        return 0;
 265}
 266
 267/*
 268 * Try to read the location of the git directory from the .git file,
 269 * return path to git directory if found.
 270 */
 271const char *read_gitfile_gently(const char *path)
 272{
 273        char *buf;
 274        char *dir;
 275        const char *slash;
 276        struct stat st;
 277        int fd;
 278        size_t len;
 279
 280        if (stat(path, &st))
 281                return NULL;
 282        if (!S_ISREG(st.st_mode))
 283                return NULL;
 284        fd = open(path, O_RDONLY);
 285        if (fd < 0)
 286                die_errno("Error opening '%s'", path);
 287        buf = xmalloc(st.st_size + 1);
 288        len = read_in_full(fd, buf, st.st_size);
 289        close(fd);
 290        if (len != st.st_size)
 291                die("Error reading %s", path);
 292        buf[len] = '\0';
 293        if (prefixcmp(buf, "gitdir: "))
 294                die("Invalid gitfile format: %s", path);
 295        while (buf[len - 1] == '\n' || buf[len - 1] == '\r')
 296                len--;
 297        if (len < 9)
 298                die("No path in gitfile: %s", path);
 299        buf[len] = '\0';
 300        dir = buf + 8;
 301
 302        if (!is_absolute_path(dir) && (slash = strrchr(path, '/'))) {
 303                size_t pathlen = slash+1 - path;
 304                size_t dirlen = pathlen + len - 8;
 305                dir = xmalloc(dirlen + 1);
 306                strncpy(dir, path, pathlen);
 307                strncpy(dir + pathlen, buf + 8, len - 8);
 308                dir[dirlen] = '\0';
 309                free(buf);
 310                buf = dir;
 311        }
 312
 313        if (!is_git_directory(dir))
 314                die("Not a git repository: %s", dir);
 315        path = real_path(dir);
 316
 317        free(buf);
 318        return path;
 319}
 320
 321static const char *setup_explicit_git_dir(const char *gitdirenv,
 322                                          char *cwd, int len,
 323                                          int *nongit_ok)
 324{
 325        const char *work_tree_env = getenv(GIT_WORK_TREE_ENVIRONMENT);
 326        const char *worktree;
 327        char *gitfile;
 328        int offset;
 329
 330        if (PATH_MAX - 40 < strlen(gitdirenv))
 331                die("'$%s' too big", GIT_DIR_ENVIRONMENT);
 332
 333        gitfile = (char*)read_gitfile_gently(gitdirenv);
 334        if (gitfile) {
 335                gitfile = xstrdup(gitfile);
 336                gitdirenv = gitfile;
 337        }
 338
 339        if (!is_git_directory(gitdirenv)) {
 340                if (nongit_ok) {
 341                        *nongit_ok = 1;
 342                        free(gitfile);
 343                        return NULL;
 344                }
 345                die("Not a git repository: '%s'", gitdirenv);
 346        }
 347
 348        if (check_repository_format_gently(gitdirenv, nongit_ok)) {
 349                free(gitfile);
 350                return NULL;
 351        }
 352
 353        /* #3, #7, #11, #15, #19, #23, #27, #31 (see t1510) */
 354        if (work_tree_env)
 355                set_git_work_tree(work_tree_env);
 356        else if (is_bare_repository_cfg > 0) {
 357                if (git_work_tree_cfg) /* #22.2, #30 */
 358                        die("core.bare and core.worktree do not make sense");
 359
 360                /* #18, #26 */
 361                set_git_dir(gitdirenv);
 362                free(gitfile);
 363                return NULL;
 364        }
 365        else if (git_work_tree_cfg) { /* #6, #14 */
 366                if (is_absolute_path(git_work_tree_cfg))
 367                        set_git_work_tree(git_work_tree_cfg);
 368                else {
 369                        char core_worktree[PATH_MAX];
 370                        if (chdir(gitdirenv))
 371                                die_errno("Could not chdir to '%s'", gitdirenv);
 372                        if (chdir(git_work_tree_cfg))
 373                                die_errno("Could not chdir to '%s'", git_work_tree_cfg);
 374                        if (!getcwd(core_worktree, PATH_MAX))
 375                                die_errno("Could not get directory '%s'", git_work_tree_cfg);
 376                        if (chdir(cwd))
 377                                die_errno("Could not come back to cwd");
 378                        set_git_work_tree(core_worktree);
 379                }
 380        }
 381        else /* #2, #10 */
 382                set_git_work_tree(".");
 383
 384        /* set_git_work_tree() must have been called by now */
 385        worktree = get_git_work_tree();
 386
 387        /* both get_git_work_tree() and cwd are already normalized */
 388        if (!strcmp(cwd, worktree)) { /* cwd == worktree */
 389                set_git_dir(gitdirenv);
 390                free(gitfile);
 391                return NULL;
 392        }
 393
 394        offset = dir_inside_of(cwd, worktree);
 395        if (offset >= 0) {      /* cwd inside worktree? */
 396                set_git_dir(real_path(gitdirenv));
 397                if (chdir(worktree))
 398                        die_errno("Could not chdir to '%s'", worktree);
 399                cwd[len++] = '/';
 400                cwd[len] = '\0';
 401                free(gitfile);
 402                return cwd + offset;
 403        }
 404
 405        /* cwd outside worktree */
 406        set_git_dir(gitdirenv);
 407        free(gitfile);
 408        return NULL;
 409}
 410
 411static const char *setup_discovered_git_dir(const char *gitdir,
 412                                            char *cwd, int offset, int len,
 413                                            int *nongit_ok)
 414{
 415        if (check_repository_format_gently(gitdir, nongit_ok))
 416                return NULL;
 417
 418        /* --work-tree is set without --git-dir; use discovered one */
 419        if (getenv(GIT_WORK_TREE_ENVIRONMENT) || git_work_tree_cfg) {
 420                if (offset != len && !is_absolute_path(gitdir))
 421                        gitdir = xstrdup(real_path(gitdir));
 422                if (chdir(cwd))
 423                        die_errno("Could not come back to cwd");
 424                return setup_explicit_git_dir(gitdir, cwd, len, nongit_ok);
 425        }
 426
 427        /* #16.2, #17.2, #20.2, #21.2, #24, #25, #28, #29 (see t1510) */
 428        if (is_bare_repository_cfg > 0) {
 429                set_git_dir(offset == len ? gitdir : real_path(gitdir));
 430                if (chdir(cwd))
 431                        die_errno("Could not come back to cwd");
 432                return NULL;
 433        }
 434
 435        /* #0, #1, #5, #8, #9, #12, #13 */
 436        set_git_work_tree(".");
 437        if (strcmp(gitdir, DEFAULT_GIT_DIR_ENVIRONMENT))
 438                set_git_dir(gitdir);
 439        inside_git_dir = 0;
 440        inside_work_tree = 1;
 441        if (offset == len)
 442                return NULL;
 443
 444        /* Make "offset" point to past the '/', and add a '/' at the end */
 445        offset++;
 446        cwd[len++] = '/';
 447        cwd[len] = 0;
 448        return cwd + offset;
 449}
 450
 451/* #16.1, #17.1, #20.1, #21.1, #22.1 (see t1510) */
 452static const char *setup_bare_git_dir(char *cwd, int offset, int len, int *nongit_ok)
 453{
 454        int root_len;
 455
 456        if (check_repository_format_gently(".", nongit_ok))
 457                return NULL;
 458
 459        /* --work-tree is set without --git-dir; use discovered one */
 460        if (getenv(GIT_WORK_TREE_ENVIRONMENT) || git_work_tree_cfg) {
 461                const char *gitdir;
 462
 463                gitdir = offset == len ? "." : xmemdupz(cwd, offset);
 464                if (chdir(cwd))
 465                        die_errno("Could not come back to cwd");
 466                return setup_explicit_git_dir(gitdir, cwd, len, nongit_ok);
 467        }
 468
 469        inside_git_dir = 1;
 470        inside_work_tree = 0;
 471        if (offset != len) {
 472                if (chdir(cwd))
 473                        die_errno("Cannot come back to cwd");
 474                root_len = offset_1st_component(cwd);
 475                cwd[offset > root_len ? offset : root_len] = '\0';
 476                set_git_dir(cwd);
 477        }
 478        else
 479                set_git_dir(".");
 480        return NULL;
 481}
 482
 483static const char *setup_nongit(const char *cwd, int *nongit_ok)
 484{
 485        if (!nongit_ok)
 486                die("Not a git repository (or any of the parent directories): %s", DEFAULT_GIT_DIR_ENVIRONMENT);
 487        if (chdir(cwd))
 488                die_errno("Cannot come back to cwd");
 489        *nongit_ok = 1;
 490        return NULL;
 491}
 492
 493static dev_t get_device_or_die(const char *path, const char *prefix)
 494{
 495        struct stat buf;
 496        if (stat(path, &buf))
 497                die_errno("failed to stat '%s%s%s'",
 498                                prefix ? prefix : "",
 499                                prefix ? "/" : "", path);
 500        return buf.st_dev;
 501}
 502
 503/*
 504 * We cannot decide in this function whether we are in the work tree or
 505 * not, since the config can only be read _after_ this function was called.
 506 */
 507static const char *setup_git_directory_gently_1(int *nongit_ok)
 508{
 509        const char *env_ceiling_dirs = getenv(CEILING_DIRECTORIES_ENVIRONMENT);
 510        static char cwd[PATH_MAX+1];
 511        const char *gitdirenv, *ret;
 512        char *gitfile;
 513        int len, offset, ceil_offset;
 514        dev_t current_device = 0;
 515        int one_filesystem = 1;
 516
 517        /*
 518         * Let's assume that we are in a git repository.
 519         * If it turns out later that we are somewhere else, the value will be
 520         * updated accordingly.
 521         */
 522        if (nongit_ok)
 523                *nongit_ok = 0;
 524
 525        if (!getcwd(cwd, sizeof(cwd)-1))
 526                die_errno("Unable to read current working directory");
 527        offset = len = strlen(cwd);
 528
 529        /*
 530         * If GIT_DIR is set explicitly, we're not going
 531         * to do any discovery, but we still do repository
 532         * validation.
 533         */
 534        gitdirenv = getenv(GIT_DIR_ENVIRONMENT);
 535        if (gitdirenv)
 536                return setup_explicit_git_dir(gitdirenv, cwd, len, nongit_ok);
 537
 538        ceil_offset = longest_ancestor_length(cwd, env_ceiling_dirs);
 539        if (ceil_offset < 0 && has_dos_drive_prefix(cwd))
 540                ceil_offset = 1;
 541
 542        /*
 543         * Test in the following order (relative to the cwd):
 544         * - .git (file containing "gitdir: <path>")
 545         * - .git/
 546         * - ./ (bare)
 547         * - ../.git
 548         * - ../.git/
 549         * - ../ (bare)
 550         * - ../../.git/
 551         *   etc.
 552         */
 553        one_filesystem = !git_env_bool("GIT_DISCOVERY_ACROSS_FILESYSTEM", 0);
 554        if (one_filesystem)
 555                current_device = get_device_or_die(".", NULL);
 556        for (;;) {
 557                gitfile = (char*)read_gitfile_gently(DEFAULT_GIT_DIR_ENVIRONMENT);
 558                if (gitfile)
 559                        gitdirenv = gitfile = xstrdup(gitfile);
 560                else {
 561                        if (is_git_directory(DEFAULT_GIT_DIR_ENVIRONMENT))
 562                                gitdirenv = DEFAULT_GIT_DIR_ENVIRONMENT;
 563                }
 564
 565                if (gitdirenv) {
 566                        ret = setup_discovered_git_dir(gitdirenv,
 567                                                       cwd, offset, len,
 568                                                       nongit_ok);
 569                        free(gitfile);
 570                        return ret;
 571                }
 572                free(gitfile);
 573
 574                if (is_git_directory("."))
 575                        return setup_bare_git_dir(cwd, offset, len, nongit_ok);
 576
 577                while (--offset > ceil_offset && cwd[offset] != '/');
 578                if (offset <= ceil_offset)
 579                        return setup_nongit(cwd, nongit_ok);
 580                if (one_filesystem) {
 581                        dev_t parent_device = get_device_or_die("..", cwd);
 582                        if (parent_device != current_device) {
 583                                if (nongit_ok) {
 584                                        if (chdir(cwd))
 585                                                die_errno("Cannot come back to cwd");
 586                                        *nongit_ok = 1;
 587                                        return NULL;
 588                                }
 589                                cwd[offset] = '\0';
 590                                die("Not a git repository (or any parent up to mount parent %s)\n"
 591                                "Stopping at filesystem boundary (GIT_DISCOVERY_ACROSS_FILESYSTEM not set).", cwd);
 592                        }
 593                }
 594                if (chdir("..")) {
 595                        cwd[offset] = '\0';
 596                        die_errno("Cannot change to '%s/..'", cwd);
 597                }
 598        }
 599}
 600
 601const char *setup_git_directory_gently(int *nongit_ok)
 602{
 603        const char *prefix;
 604
 605        prefix = setup_git_directory_gently_1(nongit_ok);
 606        if (startup_info) {
 607                startup_info->have_repository = !nongit_ok || !*nongit_ok;
 608                startup_info->prefix = prefix;
 609        }
 610        return prefix;
 611}
 612
 613int git_config_perm(const char *var, const char *value)
 614{
 615        int i;
 616        char *endptr;
 617
 618        if (value == NULL)
 619                return PERM_GROUP;
 620
 621        if (!strcmp(value, "umask"))
 622                return PERM_UMASK;
 623        if (!strcmp(value, "group"))
 624                return PERM_GROUP;
 625        if (!strcmp(value, "all") ||
 626            !strcmp(value, "world") ||
 627            !strcmp(value, "everybody"))
 628                return PERM_EVERYBODY;
 629
 630        /* Parse octal numbers */
 631        i = strtol(value, &endptr, 8);
 632
 633        /* If not an octal number, maybe true/false? */
 634        if (*endptr != 0)
 635                return git_config_bool(var, value) ? PERM_GROUP : PERM_UMASK;
 636
 637        /*
 638         * Treat values 0, 1 and 2 as compatibility cases, otherwise it is
 639         * a chmod value to restrict to.
 640         */
 641        switch (i) {
 642        case PERM_UMASK:               /* 0 */
 643                return PERM_UMASK;
 644        case OLD_PERM_GROUP:           /* 1 */
 645                return PERM_GROUP;
 646        case OLD_PERM_EVERYBODY:       /* 2 */
 647                return PERM_EVERYBODY;
 648        }
 649
 650        /* A filemode value was given: 0xxx */
 651
 652        if ((i & 0600) != 0600)
 653                die("Problem with core.sharedRepository filemode value "
 654                    "(0%.3o).\nThe owner of files must always have "
 655                    "read and write permissions.", i);
 656
 657        /*
 658         * Mask filemode value. Others can not get write permission.
 659         * x flags for directories are handled separately.
 660         */
 661        return -(i & 0666);
 662}
 663
 664int check_repository_format_version(const char *var, const char *value, void *cb)
 665{
 666        if (strcmp(var, "core.repositoryformatversion") == 0)
 667                repository_format_version = git_config_int(var, value);
 668        else if (strcmp(var, "core.sharedrepository") == 0)
 669                shared_repository = git_config_perm(var, value);
 670        else if (strcmp(var, "core.bare") == 0) {
 671                is_bare_repository_cfg = git_config_bool(var, value);
 672                if (is_bare_repository_cfg == 1)
 673                        inside_work_tree = -1;
 674        } else if (strcmp(var, "core.worktree") == 0) {
 675                if (!value)
 676                        return config_error_nonbool(var);
 677                free(git_work_tree_cfg);
 678                git_work_tree_cfg = xstrdup(value);
 679                inside_work_tree = -1;
 680        }
 681        return 0;
 682}
 683
 684int check_repository_format(void)
 685{
 686        return check_repository_format_gently(get_git_dir(), NULL);
 687}
 688
 689/*
 690 * Returns the "prefix", a path to the current working directory
 691 * relative to the work tree root, or NULL, if the current working
 692 * directory is not a strict subdirectory of the work tree root. The
 693 * prefix always ends with a '/' character.
 694 */
 695const char *setup_git_directory(void)
 696{
 697        return setup_git_directory_gently(NULL);
 698}