builtin-init-db.con commit typo fix: Directory `...' exist, ...: s/exist/exists/ (0484682)
   1/*
   2 * GIT - The information manager from hell
   3 *
   4 * Copyright (C) Linus Torvalds, 2005
   5 */
   6#include "cache.h"
   7#include "builtin.h"
   8#include "exec_cmd.h"
   9#include "parse-options.h"
  10
  11#ifndef DEFAULT_GIT_TEMPLATE_DIR
  12#define DEFAULT_GIT_TEMPLATE_DIR "/usr/share/git-core/templates"
  13#endif
  14
  15#ifdef NO_TRUSTABLE_FILEMODE
  16#define TEST_FILEMODE 0
  17#else
  18#define TEST_FILEMODE 1
  19#endif
  20
  21static int init_is_bare_repository = 0;
  22static int init_shared_repository = -1;
  23
  24static void safe_create_dir(const char *dir, int share)
  25{
  26        if (mkdir(dir, 0777) < 0) {
  27                if (errno != EEXIST) {
  28                        perror(dir);
  29                        exit(1);
  30                }
  31        }
  32        else if (share && adjust_shared_perm(dir))
  33                die("Could not make %s writable by group", dir);
  34}
  35
  36static void copy_templates_1(char *path, int baselen,
  37                             char *template, int template_baselen,
  38                             DIR *dir)
  39{
  40        struct dirent *de;
  41
  42        /* Note: if ".git/hooks" file exists in the repository being
  43         * re-initialized, /etc/core-git/templates/hooks/update would
  44         * cause "git init" to fail here.  I think this is sane but
  45         * it means that the set of templates we ship by default, along
  46         * with the way the namespace under .git/ is organized, should
  47         * be really carefully chosen.
  48         */
  49        safe_create_dir(path, 1);
  50        while ((de = readdir(dir)) != NULL) {
  51                struct stat st_git, st_template;
  52                int namelen;
  53                int exists = 0;
  54
  55                if (de->d_name[0] == '.')
  56                        continue;
  57                namelen = strlen(de->d_name);
  58                if ((PATH_MAX <= baselen + namelen) ||
  59                    (PATH_MAX <= template_baselen + namelen))
  60                        die("insanely long template name %s", de->d_name);
  61                memcpy(path + baselen, de->d_name, namelen+1);
  62                memcpy(template + template_baselen, de->d_name, namelen+1);
  63                if (lstat(path, &st_git)) {
  64                        if (errno != ENOENT)
  65                                die_errno("cannot stat '%s'", path);
  66                }
  67                else
  68                        exists = 1;
  69
  70                if (lstat(template, &st_template))
  71                        die_errno("cannot stat template '%s'", template);
  72
  73                if (S_ISDIR(st_template.st_mode)) {
  74                        DIR *subdir = opendir(template);
  75                        int baselen_sub = baselen + namelen;
  76                        int template_baselen_sub = template_baselen + namelen;
  77                        if (!subdir)
  78                                die_errno("cannot opendir '%s'", template);
  79                        path[baselen_sub++] =
  80                                template[template_baselen_sub++] = '/';
  81                        path[baselen_sub] =
  82                                template[template_baselen_sub] = 0;
  83                        copy_templates_1(path, baselen_sub,
  84                                         template, template_baselen_sub,
  85                                         subdir);
  86                        closedir(subdir);
  87                }
  88                else if (exists)
  89                        continue;
  90                else if (S_ISLNK(st_template.st_mode)) {
  91                        char lnk[256];
  92                        int len;
  93                        len = readlink(template, lnk, sizeof(lnk));
  94                        if (len < 0)
  95                                die_errno("cannot readlink '%s'", template);
  96                        if (sizeof(lnk) <= len)
  97                                die("insanely long symlink %s", template);
  98                        lnk[len] = 0;
  99                        if (symlink(lnk, path))
 100                                die_errno("cannot symlink '%s' '%s'", lnk, path);
 101                }
 102                else if (S_ISREG(st_template.st_mode)) {
 103                        if (copy_file(path, template, st_template.st_mode))
 104                                die_errno("cannot copy '%s' to '%s'", template,
 105                                          path);
 106                }
 107                else
 108                        error("ignoring template %s", template);
 109        }
 110}
 111
 112static void copy_templates(const char *template_dir)
 113{
 114        char path[PATH_MAX];
 115        char template_path[PATH_MAX];
 116        int template_len;
 117        DIR *dir;
 118        const char *git_dir = get_git_dir();
 119        int len = strlen(git_dir);
 120
 121        if (!template_dir)
 122                template_dir = getenv(TEMPLATE_DIR_ENVIRONMENT);
 123        if (!template_dir)
 124                template_dir = system_path(DEFAULT_GIT_TEMPLATE_DIR);
 125        if (!template_dir[0])
 126                return;
 127        template_len = strlen(template_dir);
 128        if (PATH_MAX <= (template_len+strlen("/config")))
 129                die("insanely long template path %s", template_dir);
 130        strcpy(template_path, template_dir);
 131        if (template_path[template_len-1] != '/') {
 132                template_path[template_len++] = '/';
 133                template_path[template_len] = 0;
 134        }
 135        dir = opendir(template_path);
 136        if (!dir) {
 137                warning("templates not found %s", template_dir);
 138                return;
 139        }
 140
 141        /* Make sure that template is from the correct vintage */
 142        strcpy(template_path + template_len, "config");
 143        repository_format_version = 0;
 144        git_config_from_file(check_repository_format_version,
 145                             template_path, NULL);
 146        template_path[template_len] = 0;
 147
 148        if (repository_format_version &&
 149            repository_format_version != GIT_REPO_VERSION) {
 150                warning("not copying templates of "
 151                        "a wrong format version %d from '%s'",
 152                        repository_format_version,
 153                        template_dir);
 154                closedir(dir);
 155                return;
 156        }
 157
 158        memcpy(path, git_dir, len);
 159        if (len && path[len - 1] != '/')
 160                path[len++] = '/';
 161        path[len] = 0;
 162        copy_templates_1(path, len,
 163                         template_path, template_len,
 164                         dir);
 165        closedir(dir);
 166}
 167
 168static int create_default_files(const char *template_path)
 169{
 170        const char *git_dir = get_git_dir();
 171        unsigned len = strlen(git_dir);
 172        static char path[PATH_MAX];
 173        struct stat st1;
 174        char repo_version_string[10];
 175        char junk[2];
 176        int reinit;
 177        int filemode;
 178
 179        if (len > sizeof(path)-50)
 180                die("insane git directory %s", git_dir);
 181        memcpy(path, git_dir, len);
 182
 183        if (len && path[len-1] != '/')
 184                path[len++] = '/';
 185
 186        /*
 187         * Create .git/refs/{heads,tags}
 188         */
 189        safe_create_dir(git_path("refs"), 1);
 190        safe_create_dir(git_path("refs/heads"), 1);
 191        safe_create_dir(git_path("refs/tags"), 1);
 192
 193        /* First copy the templates -- we might have the default
 194         * config file there, in which case we would want to read
 195         * from it after installing.
 196         */
 197        copy_templates(template_path);
 198
 199        git_config(git_default_config, NULL);
 200        is_bare_repository_cfg = init_is_bare_repository;
 201
 202        /* reading existing config may have overwrote it */
 203        if (init_shared_repository != -1)
 204                shared_repository = init_shared_repository;
 205
 206        /*
 207         * We would have created the above under user's umask -- under
 208         * shared-repository settings, we would need to fix them up.
 209         */
 210        if (shared_repository) {
 211                adjust_shared_perm(get_git_dir());
 212                adjust_shared_perm(git_path("refs"));
 213                adjust_shared_perm(git_path("refs/heads"));
 214                adjust_shared_perm(git_path("refs/tags"));
 215        }
 216
 217        /*
 218         * Create the default symlink from ".git/HEAD" to the "master"
 219         * branch, if it does not exist yet.
 220         */
 221        strcpy(path + len, "HEAD");
 222        reinit = (!access(path, R_OK)
 223                  || readlink(path, junk, sizeof(junk)-1) != -1);
 224        if (!reinit) {
 225                if (create_symref("HEAD", "refs/heads/master", NULL) < 0)
 226                        exit(1);
 227        }
 228
 229        /* This forces creation of new config file */
 230        sprintf(repo_version_string, "%d", GIT_REPO_VERSION);
 231        git_config_set("core.repositoryformatversion", repo_version_string);
 232
 233        path[len] = 0;
 234        strcpy(path + len, "config");
 235
 236        /* Check filemode trustability */
 237        filemode = TEST_FILEMODE;
 238        if (TEST_FILEMODE && !lstat(path, &st1)) {
 239                struct stat st2;
 240                filemode = (!chmod(path, st1.st_mode ^ S_IXUSR) &&
 241                                !lstat(path, &st2) &&
 242                                st1.st_mode != st2.st_mode);
 243        }
 244        git_config_set("core.filemode", filemode ? "true" : "false");
 245
 246        if (is_bare_repository())
 247                git_config_set("core.bare", "true");
 248        else {
 249                const char *work_tree = get_git_work_tree();
 250                git_config_set("core.bare", "false");
 251                /* allow template config file to override the default */
 252                if (log_all_ref_updates == -1)
 253                    git_config_set("core.logallrefupdates", "true");
 254                if (prefixcmp(git_dir, work_tree) ||
 255                    strcmp(git_dir + strlen(work_tree), "/.git")) {
 256                        git_config_set("core.worktree", work_tree);
 257                }
 258        }
 259
 260        if (!reinit) {
 261                /* Check if symlink is supported in the work tree */
 262                path[len] = 0;
 263                strcpy(path + len, "tXXXXXX");
 264                if (!close(xmkstemp(path)) &&
 265                    !unlink(path) &&
 266                    !symlink("testing", path) &&
 267                    !lstat(path, &st1) &&
 268                    S_ISLNK(st1.st_mode))
 269                        unlink(path); /* good */
 270                else
 271                        git_config_set("core.symlinks", "false");
 272
 273                /* Check if the filesystem is case-insensitive */
 274                path[len] = 0;
 275                strcpy(path + len, "CoNfIg");
 276                if (!access(path, F_OK))
 277                        git_config_set("core.ignorecase", "true");
 278        }
 279
 280        return reinit;
 281}
 282
 283int init_db(const char *template_dir, unsigned int flags)
 284{
 285        const char *sha1_dir;
 286        char *path;
 287        int len, reinit;
 288
 289        safe_create_dir(get_git_dir(), 0);
 290
 291        init_is_bare_repository = is_bare_repository();
 292
 293        /* Check to see if the repository version is right.
 294         * Note that a newly created repository does not have
 295         * config file, so this will not fail.  What we are catching
 296         * is an attempt to reinitialize new repository with an old tool.
 297         */
 298        check_repository_format();
 299
 300        reinit = create_default_files(template_dir);
 301
 302        sha1_dir = get_object_directory();
 303        len = strlen(sha1_dir);
 304        path = xmalloc(len + 40);
 305        memcpy(path, sha1_dir, len);
 306
 307        safe_create_dir(sha1_dir, 1);
 308        strcpy(path+len, "/pack");
 309        safe_create_dir(path, 1);
 310        strcpy(path+len, "/info");
 311        safe_create_dir(path, 1);
 312
 313        if (shared_repository) {
 314                char buf[10];
 315                /* We do not spell "group" and such, so that
 316                 * the configuration can be read by older version
 317                 * of git. Note, we use octal numbers for new share modes,
 318                 * and compatibility values for PERM_GROUP and
 319                 * PERM_EVERYBODY.
 320                 */
 321                if (shared_repository < 0)
 322                        /* force to the mode value */
 323                        sprintf(buf, "0%o", -shared_repository);
 324                else if (shared_repository == PERM_GROUP)
 325                        sprintf(buf, "%d", OLD_PERM_GROUP);
 326                else if (shared_repository == PERM_EVERYBODY)
 327                        sprintf(buf, "%d", OLD_PERM_EVERYBODY);
 328                else
 329                        die("oops");
 330                git_config_set("core.sharedrepository", buf);
 331                git_config_set("receive.denyNonFastforwards", "true");
 332        }
 333
 334        if (!(flags & INIT_DB_QUIET))
 335                printf("%s%s Git repository in %s/\n",
 336                       reinit ? "Reinitialized existing" : "Initialized empty",
 337                       shared_repository ? " shared" : "",
 338                       get_git_dir());
 339
 340        return 0;
 341}
 342
 343static int guess_repository_type(const char *git_dir)
 344{
 345        char cwd[PATH_MAX];
 346        const char *slash;
 347
 348        /*
 349         * "GIT_DIR=. git init" is always bare.
 350         * "GIT_DIR=`pwd` git init" too.
 351         */
 352        if (!strcmp(".", git_dir))
 353                return 1;
 354        if (!getcwd(cwd, sizeof(cwd)))
 355                die_errno("cannot tell cwd");
 356        if (!strcmp(git_dir, cwd))
 357                return 1;
 358        /*
 359         * "GIT_DIR=.git or GIT_DIR=something/.git is usually not.
 360         */
 361        if (!strcmp(git_dir, ".git"))
 362                return 0;
 363        slash = strrchr(git_dir, '/');
 364        if (slash && !strcmp(slash, "/.git"))
 365                return 0;
 366
 367        /*
 368         * Otherwise it is often bare.  At this point
 369         * we are just guessing.
 370         */
 371        return 1;
 372}
 373
 374static int shared_callback(const struct option *opt, const char *arg, int unset)
 375{
 376        *((int *) opt->value) = (arg) ? git_config_perm("arg", arg) : PERM_GROUP;
 377        return 0;
 378}
 379
 380static const char *const init_db_usage[] = {
 381        "git init [-q | --quiet] [--bare] [--template=<template-directory>] [--shared[=<permissions>]] [directory]",
 382        NULL
 383};
 384
 385/*
 386 * If you want to, you can share the DB area with any number of branches.
 387 * That has advantages: you can save space by sharing all the SHA1 objects.
 388 * On the other hand, it might just make lookup slower and messier. You
 389 * be the judge.  The default case is to have one DB per managed directory.
 390 */
 391int cmd_init_db(int argc, const char **argv, const char *prefix)
 392{
 393        const char *git_dir;
 394        const char *template_dir = NULL;
 395        unsigned int flags = 0;
 396        const struct option init_db_options[] = {
 397                OPT_STRING(0, "template", &template_dir, "template-directory",
 398                                "provide the directory from which templates will be used"),
 399                OPT_SET_INT(0, "bare", &is_bare_repository_cfg,
 400                                "create a bare repository", 1),
 401                { OPTION_CALLBACK, 0, "shared", &init_shared_repository,
 402                        "permissions",
 403                        "specify that the git repository is to be shared amongst several users",
 404                        PARSE_OPT_OPTARG | PARSE_OPT_NONEG, shared_callback, 0},
 405                OPT_BIT('q', "quiet", &flags, "be quiet", INIT_DB_QUIET),
 406                OPT_END()
 407        };
 408
 409        argc = parse_options(argc, argv, prefix, init_db_options, init_db_usage, 0);
 410
 411        if (argc == 1) {
 412                int mkdir_tried = 0;
 413        retry:
 414                if (chdir(argv[0]) < 0) {
 415                        if (!mkdir_tried) {
 416                                int saved;
 417                                /*
 418                                 * At this point we haven't read any configuration,
 419                                 * and we know shared_repository should always be 0;
 420                                 * but just in case we play safe.
 421                                 */
 422                                saved = shared_repository;
 423                                shared_repository = 0;
 424                                switch (safe_create_leading_directories_const(argv[0])) {
 425                                case -3:
 426                                        errno = EEXIST;
 427                                        /* fallthru */
 428                                case -1:
 429                                        die_errno("cannot mkdir %s", argv[0]);
 430                                        break;
 431                                default:
 432                                        break;
 433                                }
 434                                shared_repository = saved;
 435                                if (mkdir(argv[0], 0777) < 0)
 436                                        die_errno("cannot mkdir %s", argv[0]);
 437                                mkdir_tried = 1;
 438                                goto retry;
 439                        }
 440                        die_errno("cannot chdir to %s", argv[0]);
 441                }
 442        } else if (0 < argc) {
 443                usage(init_db_usage[0]);
 444        }
 445        if (is_bare_repository_cfg == 1) {
 446                static char git_dir[PATH_MAX+1];
 447
 448                setenv(GIT_DIR_ENVIRONMENT,
 449                        getcwd(git_dir, sizeof(git_dir)), 0);
 450        }
 451
 452        if (init_shared_repository != -1)
 453                shared_repository = init_shared_repository;
 454
 455        /*
 456         * GIT_WORK_TREE makes sense only in conjunction with GIT_DIR
 457         * without --bare.  Catch the error early.
 458         */
 459        git_dir = getenv(GIT_DIR_ENVIRONMENT);
 460        if ((!git_dir || is_bare_repository_cfg == 1)
 461            && getenv(GIT_WORK_TREE_ENVIRONMENT))
 462                die("%s (or --work-tree=<directory>) not allowed without "
 463                    "specifying %s (or --git-dir=<directory>)",
 464                    GIT_WORK_TREE_ENVIRONMENT,
 465                    GIT_DIR_ENVIRONMENT);
 466
 467        /*
 468         * Set up the default .git directory contents
 469         */
 470        if (!git_dir)
 471                git_dir = DEFAULT_GIT_DIR_ENVIRONMENT;
 472
 473        if (is_bare_repository_cfg < 0)
 474                is_bare_repository_cfg = guess_repository_type(git_dir);
 475
 476        if (!is_bare_repository_cfg) {
 477                if (git_dir) {
 478                        const char *git_dir_parent = strrchr(git_dir, '/');
 479                        if (git_dir_parent) {
 480                                char *rel = xstrndup(git_dir, git_dir_parent - git_dir);
 481                                git_work_tree_cfg = xstrdup(make_absolute_path(rel));
 482                                free(rel);
 483                        }
 484                }
 485                if (!git_work_tree_cfg) {
 486                        git_work_tree_cfg = xcalloc(PATH_MAX, 1);
 487                        if (!getcwd(git_work_tree_cfg, PATH_MAX))
 488                                die_errno ("Cannot access current working directory");
 489                }
 490                if (access(get_git_work_tree(), X_OK))
 491                        die_errno ("Cannot access work tree '%s'",
 492                                   get_git_work_tree());
 493        }
 494
 495        set_git_dir(make_absolute_path(git_dir));
 496
 497        return init_db(template_dir, flags);
 498}