| #include "git-compat-util.h" |
| #include "abspath.h" |
| #include "copy.h" |
| #include "environment.h" |
| #include "exec-cmd.h" |
| #include "gettext.h" |
| #include "object-name.h" |
| #include "refs.h" |
| #include "repository.h" |
| #include "config.h" |
| #include "dir.h" |
| #include "setup.h" |
| #include "string-list.h" |
| #include "chdir-notify.h" |
| #include "path.h" |
| #include "quote.h" |
| #include "trace2.h" |
| #include "worktree.h" |
| #include "exec-cmd.h" |
| |
| static int inside_git_dir = -1; |
| static int inside_work_tree = -1; |
| static int work_tree_config_is_bogus; |
| enum allowed_bare_repo { |
| ALLOWED_BARE_REPO_EXPLICIT = 0, |
| ALLOWED_BARE_REPO_ALL, |
| }; |
| |
| static struct startup_info the_startup_info; |
| struct startup_info *startup_info = &the_startup_info; |
| const char *tmp_original_cwd; |
| |
| /* |
| * The input parameter must contain an absolute path, and it must already be |
| * normalized. |
| * |
| * Find the part of an absolute path that lies inside the work tree by |
| * dereferencing symlinks outside the work tree, for example: |
| * /dir1/repo/dir2/file (work tree is /dir1/repo) -> dir2/file |
| * /dir/file (work tree is /) -> dir/file |
| * /dir/symlink1/symlink2 (symlink1 points to work tree) -> symlink2 |
| * /dir/repolink/file (repolink points to /dir/repo) -> file |
| * /dir/repo (exactly equal to work tree) -> (empty string) |
| */ |
| static int abspath_part_inside_repo(char *path) |
| { |
| size_t len; |
| size_t wtlen; |
| char *path0; |
| int off; |
| const char *work_tree = get_git_work_tree(); |
| struct strbuf realpath = STRBUF_INIT; |
| |
| if (!work_tree) |
| return -1; |
| wtlen = strlen(work_tree); |
| len = strlen(path); |
| off = offset_1st_component(path); |
| |
| /* check if work tree is already the prefix */ |
| if (wtlen <= len && !fspathncmp(path, work_tree, wtlen)) { |
| if (path[wtlen] == '/') { |
| memmove(path, path + wtlen + 1, len - wtlen); |
| return 0; |
| } else if (path[wtlen - 1] == '/' || path[wtlen] == '\0') { |
| /* work tree is the root, or the whole path */ |
| memmove(path, path + wtlen, len - wtlen + 1); |
| return 0; |
| } |
| /* work tree might match beginning of a symlink to work tree */ |
| off = wtlen; |
| } |
| path0 = path; |
| path += off; |
| |
| /* check each '/'-terminated level */ |
| while (*path) { |
| path++; |
| if (*path == '/') { |
| *path = '\0'; |
| strbuf_realpath(&realpath, path0, 1); |
| if (fspathcmp(realpath.buf, work_tree) == 0) { |
| memmove(path0, path + 1, len - (path - path0)); |
| strbuf_release(&realpath); |
| return 0; |
| } |
| *path = '/'; |
| } |
| } |
| |
| /* check whole path */ |
| strbuf_realpath(&realpath, path0, 1); |
| if (fspathcmp(realpath.buf, work_tree) == 0) { |
| *path0 = '\0'; |
| strbuf_release(&realpath); |
| return 0; |
| } |
| |
| strbuf_release(&realpath); |
| return -1; |
| } |
| |
| /* |
| * Normalize "path", prepending the "prefix" for relative paths. If |
| * remaining_prefix is not NULL, return the actual prefix still |
| * remains in the path. For example, prefix = sub1/sub2/ and path is |
| * |
| * foo -> sub1/sub2/foo (full prefix) |
| * ../foo -> sub1/foo (remaining prefix is sub1/) |
| * ../../bar -> bar (no remaining prefix) |
| * ../../sub1/sub2/foo -> sub1/sub2/foo (but no remaining prefix) |
| * `pwd`/../bar -> sub1/bar (no remaining prefix) |
| */ |
| char *prefix_path_gently(const char *prefix, int len, |
| int *remaining_prefix, const char *path) |
| { |
| const char *orig = path; |
| char *sanitized; |
| if (is_absolute_path(orig)) { |
| sanitized = xmallocz(strlen(path)); |
| if (remaining_prefix) |
| *remaining_prefix = 0; |
| if (normalize_path_copy_len(sanitized, path, remaining_prefix)) { |
| free(sanitized); |
| return NULL; |
| } |
| if (abspath_part_inside_repo(sanitized)) { |
| free(sanitized); |
| return NULL; |
| } |
| } else { |
| sanitized = xstrfmt("%.*s%s", len, len ? prefix : "", path); |
| if (remaining_prefix) |
| *remaining_prefix = len; |
| if (normalize_path_copy_len(sanitized, sanitized, remaining_prefix)) { |
| free(sanitized); |
| return NULL; |
| } |
| } |
| return sanitized; |
| } |
| |
| char *prefix_path(const char *prefix, int len, const char *path) |
| { |
| char *r = prefix_path_gently(prefix, len, NULL, path); |
| if (!r) { |
| const char *hint_path = get_git_work_tree(); |
| if (!hint_path) |
| hint_path = get_git_dir(); |
| die(_("'%s' is outside repository at '%s'"), path, |
| absolute_path(hint_path)); |
| } |
| return r; |
| } |
| |
| int path_inside_repo(const char *prefix, const char *path) |
| { |
| int len = prefix ? strlen(prefix) : 0; |
| char *r = prefix_path_gently(prefix, len, NULL, path); |
| if (r) { |
| free(r); |
| return 1; |
| } |
| return 0; |
| } |
| |
| int check_filename(const char *prefix, const char *arg) |
| { |
| char *to_free = NULL; |
| struct stat st; |
| |
| if (skip_prefix(arg, ":/", &arg)) { |
| if (!*arg) /* ":/" is root dir, always exists */ |
| return 1; |
| prefix = NULL; |
| } else if (skip_prefix(arg, ":!", &arg) || |
| skip_prefix(arg, ":^", &arg)) { |
| if (!*arg) /* excluding everything is silly, but allowed */ |
| return 1; |
| } |
| |
| if (prefix) |
| arg = to_free = prefix_filename(prefix, arg); |
| |
| if (!lstat(arg, &st)) { |
| free(to_free); |
| return 1; /* file exists */ |
| } |
| if (is_missing_file_error(errno)) { |
| free(to_free); |
| return 0; /* file does not exist */ |
| } |
| die_errno(_("failed to stat '%s'"), arg); |
| } |
| |
| static void NORETURN die_verify_filename(struct repository *r, |
| const char *prefix, |
| const char *arg, |
| int diagnose_misspelt_rev) |
| { |
| if (!diagnose_misspelt_rev) |
| die(_("%s: no such path in the working tree.\n" |
| "Use 'git <command> -- <path>...' to specify paths that do not exist locally."), |
| arg); |
| /* |
| * Saying "'(icase)foo' does not exist in the index" when the |
| * user gave us ":(icase)foo" is just stupid. A magic pathspec |
| * begins with a colon and is followed by a non-alnum; do not |
| * let maybe_die_on_misspelt_object_name() even trigger. |
| */ |
| if (!(arg[0] == ':' && !isalnum(arg[1]))) |
| maybe_die_on_misspelt_object_name(r, arg, prefix); |
| |
| /* ... or fall back the most general message. */ |
| die(_("ambiguous argument '%s': unknown revision or path not in the working tree.\n" |
| "Use '--' to separate paths from revisions, like this:\n" |
| "'git <command> [<revision>...] -- [<file>...]'"), arg); |
| |
| } |
| |
| /* |
| * Check for arguments that don't resolve as actual files, |
| * but which look sufficiently like pathspecs that we'll consider |
| * them such for the purposes of rev/pathspec DWIM parsing. |
| */ |
| static int looks_like_pathspec(const char *arg) |
| { |
| const char *p; |
| int escaped = 0; |
| |
| /* |
| * Wildcard characters imply the user is looking to match pathspecs |
| * that aren't in the filesystem. Note that this doesn't include |
| * backslash even though it's a glob special; by itself it doesn't |
| * cause any increase in the match. Likewise ignore backslash-escaped |
| * wildcard characters. |
| */ |
| for (p = arg; *p; p++) { |
| if (escaped) { |
| escaped = 0; |
| } else if (is_glob_special(*p)) { |
| if (*p == '\\') |
| escaped = 1; |
| else |
| return 1; |
| } |
| } |
| |
| /* long-form pathspec magic */ |
| if (starts_with(arg, ":(")) |
| return 1; |
| |
| return 0; |
| } |
| |
| /* |
| * Verify a filename that we got as an argument for a pathspec |
| * entry. Note that a filename that begins with "-" never verifies |
| * as true, because even if such a filename were to exist, we want |
| * it to be preceded by the "--" marker (or we want the user to |
| * use a format like "./-filename") |
| * |
| * The "diagnose_misspelt_rev" is used to provide a user-friendly |
| * diagnosis when dying upon finding that "name" is not a pathname. |
| * If set to 1, the diagnosis will try to diagnose "name" as an |
| * invalid object name (e.g. HEAD:foo). If set to 0, the diagnosis |
| * will only complain about an inexisting file. |
| * |
| * This function is typically called to check that a "file or rev" |
| * argument is unambiguous. In this case, the caller will want |
| * diagnose_misspelt_rev == 1 when verifying the first non-rev |
| * argument (which could have been a revision), and |
| * diagnose_misspelt_rev == 0 for the next ones (because we already |
| * saw a filename, there's not ambiguity anymore). |
| */ |
| void verify_filename(const char *prefix, |
| const char *arg, |
| int diagnose_misspelt_rev) |
| { |
| if (*arg == '-') |
| die(_("option '%s' must come before non-option arguments"), arg); |
| if (looks_like_pathspec(arg) || check_filename(prefix, arg)) |
| return; |
| die_verify_filename(the_repository, prefix, arg, diagnose_misspelt_rev); |
| } |
| |
| /* |
| * Opposite of the above: the command line did not have -- marker |
| * and we parsed the arg as a refname. It should not be interpretable |
| * as a filename. |
| */ |
| void verify_non_filename(const char *prefix, const char *arg) |
| { |
| if (!is_inside_work_tree() || is_inside_git_dir()) |
| return; |
| if (*arg == '-') |
| return; /* flag */ |
| if (!check_filename(prefix, arg)) |
| return; |
| die(_("ambiguous argument '%s': both revision and filename\n" |
| "Use '--' to separate paths from revisions, like this:\n" |
| "'git <command> [<revision>...] -- [<file>...]'"), arg); |
| } |
| |
| int get_common_dir(struct strbuf *sb, const char *gitdir) |
| { |
| const char *git_env_common_dir = getenv(GIT_COMMON_DIR_ENVIRONMENT); |
| if (git_env_common_dir) { |
| strbuf_addstr(sb, git_env_common_dir); |
| return 1; |
| } else { |
| return get_common_dir_noenv(sb, gitdir); |
| } |
| } |
| |
| int get_common_dir_noenv(struct strbuf *sb, const char *gitdir) |
| { |
| struct strbuf data = STRBUF_INIT; |
| struct strbuf path = STRBUF_INIT; |
| int ret = 0; |
| |
| strbuf_addf(&path, "%s/commondir", gitdir); |
| if (file_exists(path.buf)) { |
| if (strbuf_read_file(&data, path.buf, 0) <= 0) |
| die_errno(_("failed to read %s"), path.buf); |
| while (data.len && (data.buf[data.len - 1] == '\n' || |
| data.buf[data.len - 1] == '\r')) |
| data.len--; |
| data.buf[data.len] = '\0'; |
| strbuf_reset(&path); |
| if (!is_absolute_path(data.buf)) |
| strbuf_addf(&path, "%s/", gitdir); |
| strbuf_addbuf(&path, &data); |
| strbuf_add_real_path(sb, path.buf); |
| ret = 1; |
| } else { |
| strbuf_addstr(sb, gitdir); |
| } |
| |
| strbuf_release(&data); |
| strbuf_release(&path); |
| return ret; |
| } |
| |
| /* |
| * Test if it looks like we're at a git directory. |
| * We want to see: |
| * |
| * - either an objects/ directory _or_ the proper |
| * GIT_OBJECT_DIRECTORY environment variable |
| * - a refs/ directory |
| * - either a HEAD symlink or a HEAD file that is formatted as |
| * a proper "ref:", or a regular file HEAD that has a properly |
| * formatted sha1 object name. |
| */ |
| int is_git_directory(const char *suspect) |
| { |
| struct strbuf path = STRBUF_INIT; |
| int ret = 0; |
| size_t len; |
| |
| /* Check worktree-related signatures */ |
| strbuf_addstr(&path, suspect); |
| strbuf_complete(&path, '/'); |
| strbuf_addstr(&path, "HEAD"); |
| if (validate_headref(path.buf)) |
| goto done; |
| |
| strbuf_reset(&path); |
| get_common_dir(&path, suspect); |
| len = path.len; |
| |
| /* Check non-worktree-related signatures */ |
| if (getenv(DB_ENVIRONMENT)) { |
| if (access(getenv(DB_ENVIRONMENT), X_OK)) |
| goto done; |
| } |
| else { |
| strbuf_setlen(&path, len); |
| strbuf_addstr(&path, "/objects"); |
| if (access(path.buf, X_OK)) |
| goto done; |
| } |
| |
| strbuf_setlen(&path, len); |
| strbuf_addstr(&path, "/refs"); |
| if (access(path.buf, X_OK)) |
| goto done; |
| |
| ret = 1; |
| done: |
| strbuf_release(&path); |
| return ret; |
| } |
| |
| int is_nonbare_repository_dir(struct strbuf *path) |
| { |
| int ret = 0; |
| int gitfile_error; |
| size_t orig_path_len = path->len; |
| assert(orig_path_len != 0); |
| strbuf_complete(path, '/'); |
| strbuf_addstr(path, ".git"); |
| if (read_gitfile_gently(path->buf, &gitfile_error) || is_git_directory(path->buf)) |
| ret = 1; |
| if (gitfile_error == READ_GITFILE_ERR_OPEN_FAILED || |
| gitfile_error == READ_GITFILE_ERR_READ_FAILED) |
| ret = 1; |
| strbuf_setlen(path, orig_path_len); |
| return ret; |
| } |
| |
| int is_inside_git_dir(void) |
| { |
| if (inside_git_dir < 0) |
| inside_git_dir = is_inside_dir(get_git_dir()); |
| return inside_git_dir; |
| } |
| |
| int is_inside_work_tree(void) |
| { |
| if (inside_work_tree < 0) |
| inside_work_tree = is_inside_dir(get_git_work_tree()); |
| return inside_work_tree; |
| } |
| |
| void setup_work_tree(void) |
| { |
| const char *work_tree; |
| static int initialized = 0; |
| |
| if (initialized) |
| return; |
| |
| if (work_tree_config_is_bogus) |
| die(_("unable to set up work tree using invalid config")); |
| |
| work_tree = get_git_work_tree(); |
| if (!work_tree || chdir_notify(work_tree)) |
| die(_("this operation must be run in a work tree")); |
| |
| /* |
| * Make sure subsequent git processes find correct worktree |
| * if $GIT_WORK_TREE is set relative |
| */ |
| if (getenv(GIT_WORK_TREE_ENVIRONMENT)) |
| setenv(GIT_WORK_TREE_ENVIRONMENT, ".", 1); |
| |
| initialized = 1; |
| } |
| |
| static void setup_original_cwd(void) |
| { |
| struct strbuf tmp = STRBUF_INIT; |
| const char *worktree = NULL; |
| int offset = -1; |
| |
| if (!tmp_original_cwd) |
| return; |
| |
| /* |
| * startup_info->original_cwd points to the current working |
| * directory we inherited from our parent process, which is a |
| * directory we want to avoid removing. |
| * |
| * For convience, we would like to have the path relative to the |
| * worktree instead of an absolute path. |
| * |
| * Yes, startup_info->original_cwd is usually the same as 'prefix', |
| * but differs in two ways: |
| * - prefix has a trailing '/' |
| * - if the user passes '-C' to git, that modifies the prefix but |
| * not startup_info->original_cwd. |
| */ |
| |
| /* Normalize the directory */ |
| if (!strbuf_realpath(&tmp, tmp_original_cwd, 0)) { |
| trace2_data_string("setup", the_repository, |
| "realpath-path", tmp_original_cwd); |
| trace2_data_string("setup", the_repository, |
| "realpath-failure", strerror(errno)); |
| free((char*)tmp_original_cwd); |
| tmp_original_cwd = NULL; |
| return; |
| } |
| |
| free((char*)tmp_original_cwd); |
| tmp_original_cwd = NULL; |
| startup_info->original_cwd = strbuf_detach(&tmp, NULL); |
| |
| /* |
| * Get our worktree; we only protect the current working directory |
| * if it's in the worktree. |
| */ |
| worktree = get_git_work_tree(); |
| if (!worktree) |
| goto no_prevention_needed; |
| |
| offset = dir_inside_of(startup_info->original_cwd, worktree); |
| if (offset >= 0) { |
| /* |
| * If startup_info->original_cwd == worktree, that is already |
| * protected and we don't need original_cwd as a secondary |
| * protection measure. |
| */ |
| if (!*(startup_info->original_cwd + offset)) |
| goto no_prevention_needed; |
| |
| /* |
| * original_cwd was inside worktree; precompose it just as |
| * we do prefix so that built up paths will match |
| */ |
| startup_info->original_cwd = \ |
| precompose_string_if_needed(startup_info->original_cwd |
| + offset); |
| return; |
| } |
| |
| no_prevention_needed: |
| free((char*)startup_info->original_cwd); |
| startup_info->original_cwd = NULL; |
| } |
| |
| static int read_worktree_config(const char *var, const char *value, |
| const struct config_context *ctx UNUSED, |
| void *vdata) |
| { |
| struct repository_format *data = vdata; |
| |
| if (strcmp(var, "core.bare") == 0) { |
| data->is_bare = git_config_bool(var, value); |
| } else if (strcmp(var, "core.worktree") == 0) { |
| if (!value) |
| return config_error_nonbool(var); |
| free(data->work_tree); |
| data->work_tree = xstrdup(value); |
| } |
| return 0; |
| } |
| |
| enum extension_result { |
| EXTENSION_ERROR = -1, /* compatible with error(), etc */ |
| EXTENSION_UNKNOWN = 0, |
| EXTENSION_OK = 1 |
| }; |
| |
| /* |
| * Do not add new extensions to this function. It handles extensions which are |
| * respected even in v0-format repositories for historical compatibility. |
| */ |
| static enum extension_result handle_extension_v0(const char *var, |
| const char *value, |
| const char *ext, |
| struct repository_format *data) |
| { |
| if (!strcmp(ext, "noop")) { |
| return EXTENSION_OK; |
| } else if (!strcmp(ext, "preciousobjects")) { |
| data->precious_objects = git_config_bool(var, value); |
| return EXTENSION_OK; |
| } else if (!strcmp(ext, "partialclone")) { |
| if (!value) |
| return config_error_nonbool(var); |
| data->partial_clone = xstrdup(value); |
| return EXTENSION_OK; |
| } else if (!strcmp(ext, "worktreeconfig")) { |
| data->worktree_config = git_config_bool(var, value); |
| return EXTENSION_OK; |
| } |
| |
| return EXTENSION_UNKNOWN; |
| } |
| |
| /* |
| * Record any new extensions in this function. |
| */ |
| static enum extension_result handle_extension(const char *var, |
| const char *value, |
| const char *ext, |
| struct repository_format *data) |
| { |
| if (!strcmp(ext, "noop-v1")) { |
| return EXTENSION_OK; |
| } else if (!strcmp(ext, "objectformat")) { |
| int format; |
| |
| if (!value) |
| return config_error_nonbool(var); |
| format = hash_algo_by_name(value); |
| if (format == GIT_HASH_UNKNOWN) |
| return error(_("invalid value for '%s': '%s'"), |
| "extensions.objectformat", value); |
| data->hash_algo = format; |
| return EXTENSION_OK; |
| } else if (!strcmp(ext, "compatobjectformat")) { |
| struct string_list_item *item; |
| int format; |
| |
| if (!value) |
| return config_error_nonbool(var); |
| format = hash_algo_by_name(value); |
| if (format == GIT_HASH_UNKNOWN) |
| return error(_("invalid value for '%s': '%s'"), |
| "extensions.compatobjectformat", value); |
| /* For now only support compatObjectFormat being specified once. */ |
| for_each_string_list_item(item, &data->v1_only_extensions) { |
| if (!strcmp(item->string, "compatobjectformat")) |
| return error(_("'%s' already specified as '%s'"), |
| "extensions.compatobjectformat", |
| hash_algos[data->compat_hash_algo].name); |
| } |
| data->compat_hash_algo = format; |
| return EXTENSION_OK; |
| } else if (!strcmp(ext, "refstorage")) { |
| unsigned int format; |
| |
| if (!value) |
| return config_error_nonbool(var); |
| format = ref_storage_format_by_name(value); |
| if (format == REF_STORAGE_FORMAT_UNKNOWN) |
| return error(_("invalid value for '%s': '%s'"), |
| "extensions.refstorage", value); |
| data->ref_storage_format = format; |
| return EXTENSION_OK; |
| } |
| return EXTENSION_UNKNOWN; |
| } |
| |
| static int check_repo_format(const char *var, const char *value, |
| const struct config_context *ctx, void *vdata) |
| { |
| struct repository_format *data = vdata; |
| const char *ext; |
| |
| if (strcmp(var, "core.repositoryformatversion") == 0) |
| data->version = git_config_int(var, value, ctx->kvi); |
| else if (skip_prefix(var, "extensions.", &ext)) { |
| switch (handle_extension_v0(var, value, ext, data)) { |
| case EXTENSION_ERROR: |
| return -1; |
| case EXTENSION_OK: |
| return 0; |
| case EXTENSION_UNKNOWN: |
| break; |
| } |
| |
| switch (handle_extension(var, value, ext, data)) { |
| case EXTENSION_ERROR: |
| return -1; |
| case EXTENSION_OK: |
| string_list_append(&data->v1_only_extensions, ext); |
| return 0; |
| case EXTENSION_UNKNOWN: |
| string_list_append(&data->unknown_extensions, ext); |
| return 0; |
| } |
| } |
| |
| return read_worktree_config(var, value, ctx, vdata); |
| } |
| |
| static int check_repository_format_gently(const char *gitdir, struct repository_format *candidate, int *nongit_ok) |
| { |
| struct strbuf sb = STRBUF_INIT; |
| struct strbuf err = STRBUF_INIT; |
| int has_common; |
| |
| has_common = get_common_dir(&sb, gitdir); |
| strbuf_addstr(&sb, "/config"); |
| read_repository_format(candidate, sb.buf); |
| strbuf_release(&sb); |
| |
| /* |
| * For historical use of check_repository_format() in git-init, |
| * we treat a missing config as a silent "ok", even when nongit_ok |
| * is unset. |
| */ |
| if (candidate->version < 0) |
| return 0; |
| |
| if (verify_repository_format(candidate, &err) < 0) { |
| if (nongit_ok) { |
| warning("%s", err.buf); |
| strbuf_release(&err); |
| *nongit_ok = -1; |
| return -1; |
| } |
| die("%s", err.buf); |
| } |
| |
| repository_format_precious_objects = candidate->precious_objects; |
| string_list_clear(&candidate->unknown_extensions, 0); |
| string_list_clear(&candidate->v1_only_extensions, 0); |
| |
| if (candidate->worktree_config) { |
| /* |
| * pick up core.bare and core.worktree from per-worktree |
| * config if present |
| */ |
| strbuf_addf(&sb, "%s/config.worktree", gitdir); |
| git_config_from_file(read_worktree_config, sb.buf, candidate); |
| strbuf_release(&sb); |
| has_common = 0; |
| } |
| |
| if (!has_common) { |
| if (candidate->is_bare != -1) { |
| is_bare_repository_cfg = candidate->is_bare; |
| if (is_bare_repository_cfg == 1) |
| inside_work_tree = -1; |
| } |
| if (candidate->work_tree) { |
| free(git_work_tree_cfg); |
| git_work_tree_cfg = xstrdup(candidate->work_tree); |
| inside_work_tree = -1; |
| } |
| } |
| |
| return 0; |
| } |
| |
| int upgrade_repository_format(int target_version) |
| { |
| struct strbuf sb = STRBUF_INIT; |
| struct strbuf err = STRBUF_INIT; |
| struct strbuf repo_version = STRBUF_INIT; |
| struct repository_format repo_fmt = REPOSITORY_FORMAT_INIT; |
| int ret; |
| |
| strbuf_git_common_path(&sb, the_repository, "config"); |
| read_repository_format(&repo_fmt, sb.buf); |
| strbuf_release(&sb); |
| |
| if (repo_fmt.version >= target_version) { |
| ret = 0; |
| goto out; |
| } |
| |
| if (verify_repository_format(&repo_fmt, &err) < 0) { |
| ret = error("cannot upgrade repository format from %d to %d: %s", |
| repo_fmt.version, target_version, err.buf); |
| goto out; |
| } |
| if (!repo_fmt.version && repo_fmt.unknown_extensions.nr) { |
| ret = error("cannot upgrade repository format: " |
| "unknown extension %s", |
| repo_fmt.unknown_extensions.items[0].string); |
| goto out; |
| } |
| |
| strbuf_addf(&repo_version, "%d", target_version); |
| git_config_set("core.repositoryformatversion", repo_version.buf); |
| |
| ret = 1; |
| |
| out: |
| clear_repository_format(&repo_fmt); |
| strbuf_release(&repo_version); |
| strbuf_release(&err); |
| return ret; |
| } |
| |
| static void init_repository_format(struct repository_format *format) |
| { |
| const struct repository_format fresh = REPOSITORY_FORMAT_INIT; |
| |
| memcpy(format, &fresh, sizeof(fresh)); |
| } |
| |
| int read_repository_format(struct repository_format *format, const char *path) |
| { |
| clear_repository_format(format); |
| git_config_from_file(check_repo_format, path, format); |
| if (format->version == -1) |
| clear_repository_format(format); |
| return format->version; |
| } |
| |
| void clear_repository_format(struct repository_format *format) |
| { |
| string_list_clear(&format->unknown_extensions, 0); |
| string_list_clear(&format->v1_only_extensions, 0); |
| free(format->work_tree); |
| free(format->partial_clone); |
| init_repository_format(format); |
| } |
| |
| int verify_repository_format(const struct repository_format *format, |
| struct strbuf *err) |
| { |
| if (GIT_REPO_VERSION_READ < format->version) { |
| strbuf_addf(err, _("Expected git repo version <= %d, found %d"), |
| GIT_REPO_VERSION_READ, format->version); |
| return -1; |
| } |
| |
| if (format->version >= 1 && format->unknown_extensions.nr) { |
| int i; |
| |
| strbuf_addstr(err, Q_("unknown repository extension found:", |
| "unknown repository extensions found:", |
| format->unknown_extensions.nr)); |
| |
| for (i = 0; i < format->unknown_extensions.nr; i++) |
| strbuf_addf(err, "\n\t%s", |
| format->unknown_extensions.items[i].string); |
| return -1; |
| } |
| |
| if (format->version == 0 && format->v1_only_extensions.nr) { |
| int i; |
| |
| strbuf_addstr(err, |
| Q_("repo version is 0, but v1-only extension found:", |
| "repo version is 0, but v1-only extensions found:", |
| format->v1_only_extensions.nr)); |
| |
| for (i = 0; i < format->v1_only_extensions.nr; i++) |
| strbuf_addf(err, "\n\t%s", |
| format->v1_only_extensions.items[i].string); |
| return -1; |
| } |
| |
| return 0; |
| } |
| |
| void read_gitfile_error_die(int error_code, const char *path, const char *dir) |
| { |
| switch (error_code) { |
| case READ_GITFILE_ERR_STAT_FAILED: |
| case READ_GITFILE_ERR_NOT_A_FILE: |
| /* non-fatal; follow return path */ |
| break; |
| case READ_GITFILE_ERR_OPEN_FAILED: |
| die_errno(_("error opening '%s'"), path); |
| case READ_GITFILE_ERR_TOO_LARGE: |
| die(_("too large to be a .git file: '%s'"), path); |
| case READ_GITFILE_ERR_READ_FAILED: |
| die(_("error reading %s"), path); |
| case READ_GITFILE_ERR_INVALID_FORMAT: |
| die(_("invalid gitfile format: %s"), path); |
| case READ_GITFILE_ERR_NO_PATH: |
| die(_("no path in gitfile: %s"), path); |
| case READ_GITFILE_ERR_NOT_A_REPO: |
| die(_("not a git repository: %s"), dir); |
| default: |
| BUG("unknown error code"); |
| } |
| } |
| |
| /* |
| * Try to read the location of the git directory from the .git file, |
| * return path to git directory if found. The return value comes from |
| * a shared buffer. |
| * |
| * On failure, if return_error_code is not NULL, return_error_code |
| * will be set to an error code and NULL will be returned. If |
| * return_error_code is NULL the function will die instead (for most |
| * cases). |
| */ |
| const char *read_gitfile_gently(const char *path, int *return_error_code) |
| { |
| const int max_file_size = 1 << 20; /* 1MB */ |
| int error_code = 0; |
| char *buf = NULL; |
| char *dir = NULL; |
| const char *slash; |
| struct stat st; |
| int fd; |
| ssize_t len; |
| static struct strbuf realpath = STRBUF_INIT; |
| |
| if (stat(path, &st)) { |
| /* NEEDSWORK: discern between ENOENT vs other errors */ |
| error_code = READ_GITFILE_ERR_STAT_FAILED; |
| goto cleanup_return; |
| } |
| if (!S_ISREG(st.st_mode)) { |
| error_code = READ_GITFILE_ERR_NOT_A_FILE; |
| goto cleanup_return; |
| } |
| if (st.st_size > max_file_size) { |
| error_code = READ_GITFILE_ERR_TOO_LARGE; |
| goto cleanup_return; |
| } |
| fd = open(path, O_RDONLY); |
| if (fd < 0) { |
| error_code = READ_GITFILE_ERR_OPEN_FAILED; |
| goto cleanup_return; |
| } |
| buf = xmallocz(st.st_size); |
| len = read_in_full(fd, buf, st.st_size); |
| close(fd); |
| if (len != st.st_size) { |
| error_code = READ_GITFILE_ERR_READ_FAILED; |
| goto cleanup_return; |
| } |
| if (!starts_with(buf, "gitdir: ")) { |
| error_code = READ_GITFILE_ERR_INVALID_FORMAT; |
| goto cleanup_return; |
| } |
| while (buf[len - 1] == '\n' || buf[len - 1] == '\r') |
| len--; |
| if (len < 9) { |
| error_code = READ_GITFILE_ERR_NO_PATH; |
| goto cleanup_return; |
| } |
| buf[len] = '\0'; |
| dir = buf + 8; |
| |
| if (!is_absolute_path(dir) && (slash = strrchr(path, '/'))) { |
| size_t pathlen = slash+1 - path; |
| dir = xstrfmt("%.*s%.*s", (int)pathlen, path, |
| (int)(len - 8), buf + 8); |
| free(buf); |
| buf = dir; |
| } |
| if (!is_git_directory(dir)) { |
| error_code = READ_GITFILE_ERR_NOT_A_REPO; |
| goto cleanup_return; |
| } |
| |
| strbuf_realpath(&realpath, dir, 1); |
| path = realpath.buf; |
| |
| cleanup_return: |
| if (return_error_code) |
| *return_error_code = error_code; |
| else if (error_code) |
| read_gitfile_error_die(error_code, path, dir); |
| |
| free(buf); |
| return error_code ? NULL : path; |
| } |
| |
| static const char *setup_explicit_git_dir(const char *gitdirenv, |
| struct strbuf *cwd, |
| struct repository_format *repo_fmt, |
| int *nongit_ok) |
| { |
| const char *work_tree_env = getenv(GIT_WORK_TREE_ENVIRONMENT); |
| const char *worktree; |
| char *gitfile; |
| int offset; |
| |
| if (PATH_MAX - 40 < strlen(gitdirenv)) |
| die(_("'$%s' too big"), GIT_DIR_ENVIRONMENT); |
| |
| gitfile = (char*)read_gitfile(gitdirenv); |
| if (gitfile) { |
| gitfile = xstrdup(gitfile); |
| gitdirenv = gitfile; |
| } |
| |
| if (!is_git_directory(gitdirenv)) { |
| if (nongit_ok) { |
| *nongit_ok = 1; |
| free(gitfile); |
| return NULL; |
| } |
| die(_("not a git repository: '%s'"), gitdirenv); |
| } |
| |
| if (check_repository_format_gently(gitdirenv, repo_fmt, nongit_ok)) { |
| free(gitfile); |
| return NULL; |
| } |
| |
| /* #3, #7, #11, #15, #19, #23, #27, #31 (see t1510) */ |
| if (work_tree_env) |
| set_git_work_tree(work_tree_env); |
| else if (is_bare_repository_cfg > 0) { |
| if (git_work_tree_cfg) { |
| /* #22.2, #30 */ |
| warning("core.bare and core.worktree do not make sense"); |
| work_tree_config_is_bogus = 1; |
| } |
| |
| /* #18, #26 */ |
| set_git_dir(gitdirenv, 0); |
| free(gitfile); |
| return NULL; |
| } |
| else if (git_work_tree_cfg) { /* #6, #14 */ |
| if (is_absolute_path(git_work_tree_cfg)) |
| set_git_work_tree(git_work_tree_cfg); |
| else { |
| char *core_worktree; |
| if (chdir(gitdirenv)) |
| die_errno(_("cannot chdir to '%s'"), gitdirenv); |
| if (chdir(git_work_tree_cfg)) |
| die_errno(_("cannot chdir to '%s'"), git_work_tree_cfg); |
| core_worktree = xgetcwd(); |
| if (chdir(cwd->buf)) |
| die_errno(_("cannot come back to cwd")); |
| set_git_work_tree(core_worktree); |
| free(core_worktree); |
| } |
| } |
| else if (!git_env_bool(GIT_IMPLICIT_WORK_TREE_ENVIRONMENT, 1)) { |
| /* #16d */ |
| set_git_dir(gitdirenv, 0); |
| free(gitfile); |
| return NULL; |
| } |
| else /* #2, #10 */ |
| set_git_work_tree("."); |
| |
| /* set_git_work_tree() must have been called by now */ |
| worktree = get_git_work_tree(); |
| |
| /* both get_git_work_tree() and cwd are already normalized */ |
| if (!strcmp(cwd->buf, worktree)) { /* cwd == worktree */ |
| set_git_dir(gitdirenv, 0); |
| free(gitfile); |
| return NULL; |
| } |
| |
| offset = dir_inside_of(cwd->buf, worktree); |
| if (offset >= 0) { /* cwd inside worktree? */ |
| set_git_dir(gitdirenv, 1); |
| if (chdir(worktree)) |
| die_errno(_("cannot chdir to '%s'"), worktree); |
| strbuf_addch(cwd, '/'); |
| free(gitfile); |
| return cwd->buf + offset; |
| } |
| |
| /* cwd outside worktree */ |
| set_git_dir(gitdirenv, 0); |
| free(gitfile); |
| return NULL; |
| } |
| |
| static const char *setup_discovered_git_dir(const char *gitdir, |
| struct strbuf *cwd, int offset, |
| struct repository_format *repo_fmt, |
| int *nongit_ok) |
| { |
| if (check_repository_format_gently(gitdir, repo_fmt, nongit_ok)) |
| return NULL; |
| |
| /* --work-tree is set without --git-dir; use discovered one */ |
| if (getenv(GIT_WORK_TREE_ENVIRONMENT) || git_work_tree_cfg) { |
| char *to_free = NULL; |
| const char *ret; |
| |
| if (offset != cwd->len && !is_absolute_path(gitdir)) |
| gitdir = to_free = real_pathdup(gitdir, 1); |
| if (chdir(cwd->buf)) |
| die_errno(_("cannot come back to cwd")); |
| ret = setup_explicit_git_dir(gitdir, cwd, repo_fmt, nongit_ok); |
| free(to_free); |
| return ret; |
| } |
| |
| /* #16.2, #17.2, #20.2, #21.2, #24, #25, #28, #29 (see t1510) */ |
| if (is_bare_repository_cfg > 0) { |
| set_git_dir(gitdir, (offset != cwd->len)); |
| if (chdir(cwd->buf)) |
| die_errno(_("cannot come back to cwd")); |
| return NULL; |
| } |
| |
| /* #0, #1, #5, #8, #9, #12, #13 */ |
| set_git_work_tree("."); |
| if (strcmp(gitdir, DEFAULT_GIT_DIR_ENVIRONMENT)) |
| set_git_dir(gitdir, 0); |
| inside_git_dir = 0; |
| inside_work_tree = 1; |
| if (offset >= cwd->len) |
| return NULL; |
| |
| /* Make "offset" point past the '/' (already the case for root dirs) */ |
| if (offset != offset_1st_component(cwd->buf)) |
| offset++; |
| /* Add a '/' at the end */ |
| strbuf_addch(cwd, '/'); |
| return cwd->buf + offset; |
| } |
| |
| /* #16.1, #17.1, #20.1, #21.1, #22.1 (see t1510) */ |
| static const char *setup_bare_git_dir(struct strbuf *cwd, int offset, |
| struct repository_format *repo_fmt, |
| int *nongit_ok) |
| { |
| int root_len; |
| |
| if (check_repository_format_gently(".", repo_fmt, nongit_ok)) |
| return NULL; |
| |
| setenv(GIT_IMPLICIT_WORK_TREE_ENVIRONMENT, "0", 1); |
| |
| /* --work-tree is set without --git-dir; use discovered one */ |
| if (getenv(GIT_WORK_TREE_ENVIRONMENT) || git_work_tree_cfg) { |
| static const char *gitdir; |
| |
| gitdir = offset == cwd->len ? "." : xmemdupz(cwd->buf, offset); |
| if (chdir(cwd->buf)) |
| die_errno(_("cannot come back to cwd")); |
| return setup_explicit_git_dir(gitdir, cwd, repo_fmt, nongit_ok); |
| } |
| |
| inside_git_dir = 1; |
| inside_work_tree = 0; |
| if (offset != cwd->len) { |
| if (chdir(cwd->buf)) |
| die_errno(_("cannot come back to cwd")); |
| root_len = offset_1st_component(cwd->buf); |
| strbuf_setlen(cwd, offset > root_len ? offset : root_len); |
| set_git_dir(cwd->buf, 0); |
| } |
| else |
| set_git_dir(".", 0); |
| return NULL; |
| } |
| |
| static dev_t get_device_or_die(const char *path, const char *prefix, int prefix_len) |
| { |
| struct stat buf; |
| if (stat(path, &buf)) { |
| die_errno(_("failed to stat '%*s%s%s'"), |
| prefix_len, |
| prefix ? prefix : "", |
| prefix ? "/" : "", path); |
| } |
| return buf.st_dev; |
| } |
| |
| /* |
| * A "string_list_each_func_t" function that canonicalizes an entry |
| * from GIT_CEILING_DIRECTORIES using real_pathdup(), or |
| * discards it if unusable. The presence of an empty entry in |
| * GIT_CEILING_DIRECTORIES turns off canonicalization for all |
| * subsequent entries. |
| */ |
| static int canonicalize_ceiling_entry(struct string_list_item *item, |
| void *cb_data) |
| { |
| int *empty_entry_found = cb_data; |
| char *ceil = item->string; |
| |
| if (!*ceil) { |
| *empty_entry_found = 1; |
| return 0; |
| } else if (!is_absolute_path(ceil)) { |
| return 0; |
| } else if (*empty_entry_found) { |
| /* Keep entry but do not canonicalize it */ |
| return 1; |
| } else { |
| char *real_path = real_pathdup(ceil, 0); |
| if (!real_path) { |
| return 0; |
| } |
| free(item->string); |
| item->string = real_path; |
| return 1; |
| } |
| } |
| |
| struct safe_directory_data { |
| const char *path; |
| int is_safe; |
| }; |
| |
| static int safe_directory_cb(const char *key, const char *value, |
| const struct config_context *ctx UNUSED, void *d) |
| { |
| struct safe_directory_data *data = d; |
| |
| if (strcmp(key, "safe.directory")) |
| return 0; |
| |
| if (!value || !*value) { |
| data->is_safe = 0; |
| } else if (!strcmp(value, "*")) { |
| data->is_safe = 1; |
| } else { |
| const char *interpolated = NULL; |
| |
| if (!git_config_pathname(&interpolated, key, value) && |
| !fspathcmp(data->path, interpolated ? interpolated : value)) |
| data->is_safe = 1; |
| |
| free((char *)interpolated); |
| } |
| |
| return 0; |
| } |
| |
| /* |
| * Check if a repository is safe, by verifying the ownership of the |
| * worktree (if any), the git directory, and the gitfile (if any). |
| * |
| * Exemptions for known-safe repositories can be added via `safe.directory` |
| * config settings; for non-bare repositories, their worktree needs to be |
| * added, for bare ones their git directory. |
| */ |
| static int ensure_valid_ownership(const char *gitfile, |
| const char *worktree, const char *gitdir, |
| struct strbuf *report) |
| { |
| struct safe_directory_data data = { |
| .path = worktree ? worktree : gitdir |
| }; |
| |
| if (!git_env_bool("GIT_TEST_ASSUME_DIFFERENT_OWNER", 0) && |
| (!gitfile || is_path_owned_by_current_user(gitfile, report)) && |
| (!worktree || is_path_owned_by_current_user(worktree, report)) && |
| (!gitdir || is_path_owned_by_current_user(gitdir, report))) |
| return 1; |
| |
| /* |
| * data.path is the "path" that identifies the repository and it is |
| * constant regardless of what failed above. data.is_safe should be |
| * initialized to false, and might be changed by the callback. |
| */ |
| git_protected_config(safe_directory_cb, &data); |
| |
| return data.is_safe; |
| } |
| |
| void die_upon_dubious_ownership(const char *gitfile, const char *worktree, |
| const char *gitdir) |
| { |
| struct strbuf report = STRBUF_INIT, quoted = STRBUF_INIT; |
| const char *path; |
| |
| if (ensure_valid_ownership(gitfile, worktree, gitdir, &report)) |
| return; |
| |
| strbuf_complete(&report, '\n'); |
| path = gitfile ? gitfile : gitdir; |
| sq_quote_buf_pretty("ed, path); |
| |
| die(_("detected dubious ownership in repository at '%s'\n" |
| "%s" |
| "To add an exception for this directory, call:\n" |
| "\n" |
| "\tgit config --global --add safe.directory %s"), |
| path, report.buf, quoted.buf); |
| } |
| |
| static int allowed_bare_repo_cb(const char *key, const char *value, |
| const struct config_context *ctx UNUSED, |
| void *d) |
| { |
| enum allowed_bare_repo *allowed_bare_repo = d; |
| |
| if (strcasecmp(key, "safe.bareRepository")) |
| return 0; |
| |
| if (!strcmp(value, "explicit")) { |
| *allowed_bare_repo = ALLOWED_BARE_REPO_EXPLICIT; |
| return 0; |
| } |
| if (!strcmp(value, "all")) { |
| *allowed_bare_repo = ALLOWED_BARE_REPO_ALL; |
| return 0; |
| } |
| return -1; |
| } |
| |
| static enum allowed_bare_repo get_allowed_bare_repo(void) |
| { |
| enum allowed_bare_repo result = ALLOWED_BARE_REPO_ALL; |
| git_protected_config(allowed_bare_repo_cb, &result); |
| return result; |
| } |
| |
| static const char *allowed_bare_repo_to_string( |
| enum allowed_bare_repo allowed_bare_repo) |
| { |
| switch (allowed_bare_repo) { |
| case ALLOWED_BARE_REPO_EXPLICIT: |
| return "explicit"; |
| case ALLOWED_BARE_REPO_ALL: |
| return "all"; |
| default: |
| BUG("invalid allowed_bare_repo %d", |
| allowed_bare_repo); |
| } |
| return NULL; |
| } |
| |
| static int is_implicit_bare_repo(const char *path) |
| { |
| /* |
| * what we found is a ".git" directory at the root of |
| * the working tree. |
| */ |
| if (ends_with_path_components(path, ".git")) |
| return 1; |
| |
| /* |
| * we are inside $GIT_DIR of a secondary worktree of a |
| * non-bare repository. |
| */ |
| if (strstr(path, "/.git/worktrees/")) |
| return 1; |
| |
| /* |
| * we are inside $GIT_DIR of a worktree of a non-embedded |
| * submodule, whose superproject is not a bare repository. |
| */ |
| if (strstr(path, "/.git/modules/")) |
| return 1; |
| |
| return 0; |
| } |
| |
| /* |
| * We cannot decide in this function whether we are in the work tree or |
| * not, since the config can only be read _after_ this function was called. |
| * |
| * Also, we avoid changing any global state (such as the current working |
| * directory) to allow early callers. |
| * |
| * The directory where the search should start needs to be passed in via the |
| * `dir` parameter; upon return, the `dir` buffer will contain the path of |
| * the directory where the search ended, and `gitdir` will contain the path of |
| * the discovered .git/ directory, if any. If `gitdir` is not absolute, it |
| * is relative to `dir` (i.e. *not* necessarily the cwd). |
| */ |
| static enum discovery_result setup_git_directory_gently_1(struct strbuf *dir, |
| struct strbuf *gitdir, |
| struct strbuf *report, |
| int die_on_error) |
| { |
| const char *env_ceiling_dirs = getenv(CEILING_DIRECTORIES_ENVIRONMENT); |
| struct string_list ceiling_dirs = STRING_LIST_INIT_DUP; |
| const char *gitdirenv; |
| int ceil_offset = -1, min_offset = offset_1st_component(dir->buf); |
| dev_t current_device = 0; |
| int one_filesystem = 1; |
| |
| /* |
| * If GIT_DIR is set explicitly, we're not going |
| * to do any discovery, but we still do repository |
| * validation. |
| */ |
| gitdirenv = getenv(GIT_DIR_ENVIRONMENT); |
| if (gitdirenv) { |
| strbuf_addstr(gitdir, gitdirenv); |
| return GIT_DIR_EXPLICIT; |
| } |
| |
| if (env_ceiling_dirs) { |
| int empty_entry_found = 0; |
| |
| string_list_split(&ceiling_dirs, env_ceiling_dirs, PATH_SEP, -1); |
| filter_string_list(&ceiling_dirs, 0, |
| canonicalize_ceiling_entry, &empty_entry_found); |
| ceil_offset = longest_ancestor_length(dir->buf, &ceiling_dirs); |
| string_list_clear(&ceiling_dirs, 0); |
| } |
| |
| if (ceil_offset < 0) |
| ceil_offset = min_offset - 2; |
| |
| if (min_offset && min_offset == dir->len && |
| !is_dir_sep(dir->buf[min_offset - 1])) { |
| strbuf_addch(dir, '/'); |
| min_offset++; |
| } |
| |
| /* |
| * Test in the following order (relative to the dir): |
| * - .git (file containing "gitdir: <path>") |
| * - .git/ |
| * - ./ (bare) |
| * - ../.git |
| * - ../.git/ |
| * - ../ (bare) |
| * - ../../.git |
| * etc. |
| */ |
| one_filesystem = !git_env_bool("GIT_DISCOVERY_ACROSS_FILESYSTEM", 0); |
| if (one_filesystem) |
| current_device = get_device_or_die(dir->buf, NULL, 0); |
| for (;;) { |
| int offset = dir->len, error_code = 0; |
| char *gitdir_path = NULL; |
| char *gitfile = NULL; |
| |
| if (offset > min_offset) |
| strbuf_addch(dir, '/'); |
| strbuf_addstr(dir, DEFAULT_GIT_DIR_ENVIRONMENT); |
| gitdirenv = read_gitfile_gently(dir->buf, die_on_error ? |
| NULL : &error_code); |
| if (!gitdirenv) { |
| if (die_on_error || |
| error_code == READ_GITFILE_ERR_NOT_A_FILE) { |
| /* NEEDSWORK: fail if .git is not file nor dir */ |
| if (is_git_directory(dir->buf)) { |
| gitdirenv = DEFAULT_GIT_DIR_ENVIRONMENT; |
| gitdir_path = xstrdup(dir->buf); |
| } |
| } else if (error_code != READ_GITFILE_ERR_STAT_FAILED) |
| return GIT_DIR_INVALID_GITFILE; |
| } else |
| gitfile = xstrdup(dir->buf); |
| /* |
| * Earlier, we tentatively added DEFAULT_GIT_DIR_ENVIRONMENT |
| * to check that directory for a repository. |
| * Now trim that tentative addition away, because we want to |
| * focus on the real directory we are in. |
| */ |
| strbuf_setlen(dir, offset); |
| if (gitdirenv) { |
| enum discovery_result ret; |
| const char *gitdir_candidate = |
| gitdir_path ? gitdir_path : gitdirenv; |
| |
| if (ensure_valid_ownership(gitfile, dir->buf, |
| gitdir_candidate, report)) { |
| strbuf_addstr(gitdir, gitdirenv); |
| ret = GIT_DIR_DISCOVERED; |
| } else |
| ret = GIT_DIR_INVALID_OWNERSHIP; |
| |
| /* |
| * Earlier, during discovery, we might have allocated |
| * string copies for gitdir_path or gitfile so make |
| * sure we don't leak by freeing them now, before |
| * leaving the loop and function. |
| * |
| * Note: gitdirenv will be non-NULL whenever these are |
| * allocated, therefore we need not take care of releasing |
| * them outside of this conditional block. |
| */ |
| free(gitdir_path); |
| free(gitfile); |
| |
| return ret; |
| } |
| |
| if (is_git_directory(dir->buf)) { |
| trace2_data_string("setup", NULL, "implicit-bare-repository", dir->buf); |
| if (get_allowed_bare_repo() == ALLOWED_BARE_REPO_EXPLICIT && |
| !is_implicit_bare_repo(dir->buf)) |
| return GIT_DIR_DISALLOWED_BARE; |
| if (!ensure_valid_ownership(NULL, NULL, dir->buf, report)) |
| return GIT_DIR_INVALID_OWNERSHIP; |
| strbuf_addstr(gitdir, "."); |
| return GIT_DIR_BARE; |
| } |
| |
| if (offset <= min_offset) |
| return GIT_DIR_HIT_CEILING; |
| |
| while (--offset > ceil_offset && !is_dir_sep(dir->buf[offset])) |
| ; /* continue */ |
| if (offset <= ceil_offset) |
| return GIT_DIR_HIT_CEILING; |
| |
| strbuf_setlen(dir, offset > min_offset ? offset : min_offset); |
| if (one_filesystem && |
| current_device != get_device_or_die(dir->buf, NULL, offset)) |
| return GIT_DIR_HIT_MOUNT_POINT; |
| } |
| } |
| |
| enum discovery_result discover_git_directory_reason(struct strbuf *commondir, |
| struct strbuf *gitdir) |
| { |
| struct strbuf dir = STRBUF_INIT, err = STRBUF_INIT; |
| size_t gitdir_offset = gitdir->len, cwd_len; |
| size_t commondir_offset = commondir->len; |
| struct repository_format candidate = REPOSITORY_FORMAT_INIT; |
| enum discovery_result result; |
| |
| if (strbuf_getcwd(&dir)) |
| return GIT_DIR_CWD_FAILURE; |
| |
| cwd_len = dir.len; |
| result = setup_git_directory_gently_1(&dir, gitdir, NULL, 0); |
| if (result <= 0) { |
| strbuf_release(&dir); |
| return result; |
| } |
| |
| /* |
| * The returned gitdir is relative to dir, and if dir does not reflect |
| * the current working directory, we simply make the gitdir absolute. |
| */ |
| if (dir.len < cwd_len && !is_absolute_path(gitdir->buf + gitdir_offset)) { |
| /* Avoid a trailing "/." */ |
| if (!strcmp(".", gitdir->buf + gitdir_offset)) |
| strbuf_setlen(gitdir, gitdir_offset); |
| else |
| strbuf_addch(&dir, '/'); |
| strbuf_insert(gitdir, gitdir_offset, dir.buf, dir.len); |
| } |
| |
| get_common_dir(commondir, gitdir->buf + gitdir_offset); |
| |
| strbuf_reset(&dir); |
| strbuf_addf(&dir, "%s/config", commondir->buf + commondir_offset); |
| read_repository_format(&candidate, dir.buf); |
| strbuf_release(&dir); |
| |
| if (verify_repository_format(&candidate, &err) < 0) { |
| warning("ignoring git dir '%s': %s", |
| gitdir->buf + gitdir_offset, err.buf); |
| strbuf_release(&err); |
| strbuf_setlen(commondir, commondir_offset); |
| strbuf_setlen(gitdir, gitdir_offset); |
| clear_repository_format(&candidate); |
| return GIT_DIR_INVALID_FORMAT; |
| } |
| |
| clear_repository_format(&candidate); |
| return result; |
| } |
| |
| const char *setup_git_directory_gently(int *nongit_ok) |
| { |
| static struct strbuf cwd = STRBUF_INIT; |
| struct strbuf dir = STRBUF_INIT, gitdir = STRBUF_INIT, report = STRBUF_INIT; |
| const char *prefix = NULL; |
| struct repository_format repo_fmt = REPOSITORY_FORMAT_INIT; |
| |
| /* |
| * We may have read an incomplete configuration before |
| * setting-up the git directory. If so, clear the cache so |
| * that the next queries to the configuration reload complete |
| * configuration (including the per-repo config file that we |
| * ignored previously). |
| */ |
| git_config_clear(); |
| |
| /* |
| * Let's assume that we are in a git repository. |
| * If it turns out later that we are somewhere else, the value will be |
| * updated accordingly. |
| */ |
| if (nongit_ok) |
| *nongit_ok = 0; |
| |
| if (strbuf_getcwd(&cwd)) |
| die_errno(_("Unable to read current working directory")); |
| strbuf_addbuf(&dir, &cwd); |
| |
| switch (setup_git_directory_gently_1(&dir, &gitdir, &report, 1)) { |
| case GIT_DIR_EXPLICIT: |
| prefix = setup_explicit_git_dir(gitdir.buf, &cwd, &repo_fmt, nongit_ok); |
| break; |
| case GIT_DIR_DISCOVERED: |
| if (dir.len < cwd.len && chdir(dir.buf)) |
| die(_("cannot change to '%s'"), dir.buf); |
| prefix = setup_discovered_git_dir(gitdir.buf, &cwd, dir.len, |
| &repo_fmt, nongit_ok); |
| break; |
| case GIT_DIR_BARE: |
| if (dir.len < cwd.len && chdir(dir.buf)) |
| die(_("cannot change to '%s'"), dir.buf); |
| prefix = setup_bare_git_dir(&cwd, dir.len, &repo_fmt, nongit_ok); |
| break; |
| case GIT_DIR_HIT_CEILING: |
| if (!nongit_ok) |
| die(_("not a git repository (or any of the parent directories): %s"), |
| DEFAULT_GIT_DIR_ENVIRONMENT); |
| *nongit_ok = 1; |
| break; |
| case GIT_DIR_HIT_MOUNT_POINT: |
| if (!nongit_ok) |
| die(_("not a git repository (or any parent up to mount point %s)\n" |
| "Stopping at filesystem boundary (GIT_DISCOVERY_ACROSS_FILESYSTEM not set)."), |
| dir.buf); |
| *nongit_ok = 1; |
| break; |
| case GIT_DIR_INVALID_OWNERSHIP: |
| if (!nongit_ok) { |
| struct strbuf quoted = STRBUF_INIT; |
| |
| strbuf_complete(&report, '\n'); |
| sq_quote_buf_pretty("ed, dir.buf); |
| die(_("detected dubious ownership in repository at '%s'\n" |
| "%s" |
| "To add an exception for this directory, call:\n" |
| "\n" |
| "\tgit config --global --add safe.directory %s"), |
| dir.buf, report.buf, quoted.buf); |
| } |
| *nongit_ok = 1; |
| break; |
| case GIT_DIR_DISALLOWED_BARE: |
| if (!nongit_ok) { |
| die(_("cannot use bare repository '%s' (safe.bareRepository is '%s')"), |
| dir.buf, |
| allowed_bare_repo_to_string(get_allowed_bare_repo())); |
| } |
| *nongit_ok = 1; |
| break; |
| case GIT_DIR_CWD_FAILURE: |
| case GIT_DIR_INVALID_FORMAT: |
| /* |
| * As a safeguard against setup_git_directory_gently_1 returning |
| * these values, fallthrough to BUG. Otherwise it is possible to |
| * set startup_info->have_repository to 1 when we did nothing to |
| * find a repository. |
| */ |
| default: |
| BUG("unhandled setup_git_directory_gently_1() result"); |
| } |
| |
| /* |
| * At this point, nongit_ok is stable. If it is non-NULL and points |
| * to a non-zero value, then this means that we haven't found a |
| * repository and that the caller expects startup_info to reflect |
| * this. |
| * |
| * Regardless of the state of nongit_ok, startup_info->prefix and |
| * the GIT_PREFIX environment variable must always match. For details |
| * see Documentation/config/alias.txt. |
| */ |
| if (nongit_ok && *nongit_ok) |
| startup_info->have_repository = 0; |
| else |
| startup_info->have_repository = 1; |
| |
| /* |
| * Not all paths through the setup code will call 'set_git_dir()' (which |
| * directly sets up the environment) so in order to guarantee that the |
| * environment is in a consistent state after setup, explicitly setup |
| * the environment if we have a repository. |
| * |
| * NEEDSWORK: currently we allow bogus GIT_DIR values to be set in some |
| * code paths so we also need to explicitly setup the environment if |
| * the user has set GIT_DIR. It may be beneficial to disallow bogus |
| * GIT_DIR values at some point in the future. |
| */ |
| if (/* GIT_DIR_EXPLICIT, GIT_DIR_DISCOVERED, GIT_DIR_BARE */ |
| startup_info->have_repository || |
| /* GIT_DIR_EXPLICIT */ |
| getenv(GIT_DIR_ENVIRONMENT)) { |
| if (!the_repository->gitdir) { |
| const char *gitdir = getenv(GIT_DIR_ENVIRONMENT); |
| if (!gitdir) |
| gitdir = DEFAULT_GIT_DIR_ENVIRONMENT; |
| setup_git_env(gitdir); |
| } |
| if (startup_info->have_repository) { |
| repo_set_hash_algo(the_repository, repo_fmt.hash_algo); |
| repo_set_compat_hash_algo(the_repository, |
| repo_fmt.compat_hash_algo); |
| repo_set_ref_storage_format(the_repository, |
| repo_fmt.ref_storage_format); |
| the_repository->repository_format_worktree_config = |
| repo_fmt.worktree_config; |
| /* take ownership of repo_fmt.partial_clone */ |
| the_repository->repository_format_partial_clone = |
| repo_fmt.partial_clone; |
| repo_fmt.partial_clone = NULL; |
| } |
| } |
| /* |
| * Since precompose_string_if_needed() needs to look at |
| * the core.precomposeunicode configuration, this |
| * has to happen after the above block that finds |
| * out where the repository is, i.e. a preparation |
| * for calling git_config_get_bool(). |
| */ |
| if (prefix) { |
| prefix = precompose_string_if_needed(prefix); |
| startup_info->prefix = prefix; |
| setenv(GIT_PREFIX_ENVIRONMENT, prefix, 1); |
| } else { |
| startup_info->prefix = NULL; |
| setenv(GIT_PREFIX_ENVIRONMENT, "", 1); |
| } |
| |
| setup_original_cwd(); |
| |
| strbuf_release(&dir); |
| strbuf_release(&gitdir); |
| strbuf_release(&report); |
| clear_repository_format(&repo_fmt); |
| |
| return prefix; |
| } |
| |
| int git_config_perm(const char *var, const char *value) |
| { |
| int i; |
| char *endptr; |
| |
| if (!value) |
| return PERM_GROUP; |
| |
| if (!strcmp(value, "umask")) |
| return PERM_UMASK; |
| if (!strcmp(value, "group")) |
| return PERM_GROUP; |
| if (!strcmp(value, "all") || |
| !strcmp(value, "world") || |
| !strcmp(value, "everybody")) |
| return PERM_EVERYBODY; |
| |
| /* Parse octal numbers */ |
| i = strtol(value, &endptr, 8); |
| |
| /* If not an octal number, maybe true/false? */ |
| if (*endptr != 0) |
| return git_config_bool(var, value) ? PERM_GROUP : PERM_UMASK; |
| |
| /* |
| * Treat values 0, 1 and 2 as compatibility cases, otherwise it is |
| * a chmod value to restrict to. |
| */ |
| switch (i) { |
| case PERM_UMASK: /* 0 */ |
| return PERM_UMASK; |
| case OLD_PERM_GROUP: /* 1 */ |
| return PERM_GROUP; |
| case OLD_PERM_EVERYBODY: /* 2 */ |
| return PERM_EVERYBODY; |
| } |
| |
| /* A filemode value was given: 0xxx */ |
| |
| if ((i & 0600) != 0600) |
| die(_("problem with core.sharedRepository filemode value " |
| "(0%.3o).\nThe owner of files must always have " |
| "read and write permissions."), i); |
| |
| /* |
| * Mask filemode value. Others can not get write permission. |
| * x flags for directories are handled separately. |
| */ |
| return -(i & 0666); |
| } |
| |
| void check_repository_format(struct repository_format *fmt) |
| { |
| struct repository_format repo_fmt = REPOSITORY_FORMAT_INIT; |
| if (!fmt) |
| fmt = &repo_fmt; |
| check_repository_format_gently(get_git_dir(), fmt, NULL); |
| startup_info->have_repository = 1; |
| repo_set_hash_algo(the_repository, fmt->hash_algo); |
| repo_set_compat_hash_algo(the_repository, fmt->compat_hash_algo); |
| repo_set_ref_storage_format(the_repository, |
| fmt->ref_storage_format); |
| the_repository->repository_format_worktree_config = |
| fmt->worktree_config; |
| the_repository->repository_format_partial_clone = |
| xstrdup_or_null(fmt->partial_clone); |
| clear_repository_format(&repo_fmt); |
| } |
| |
| /* |
| * Returns the "prefix", a path to the current working directory |
| * relative to the work tree root, or NULL, if the current working |
| * directory is not a strict subdirectory of the work tree root. The |
| * prefix always ends with a '/' character. |
| */ |
| const char *setup_git_directory(void) |
| { |
| return setup_git_directory_gently(NULL); |
| } |
| |
| const char *resolve_gitdir_gently(const char *suspect, int *return_error_code) |
| { |
| if (is_git_directory(suspect)) |
| return suspect; |
| return read_gitfile_gently(suspect, return_error_code); |
| } |
| |
| /* if any standard file descriptor is missing open it to /dev/null */ |
| void sanitize_stdfds(void) |
| { |
| int fd = xopen("/dev/null", O_RDWR); |
| while (fd < 2) |
| fd = xdup(fd); |
| if (fd > 2) |
| close(fd); |
| } |
| |
| int daemonize(void) |
| { |
| #ifdef NO_POSIX_GOODIES |
| errno = ENOSYS; |
| return -1; |
| #else |
| switch (fork()) { |
| case 0: |
| break; |
| case -1: |
| die_errno(_("fork failed")); |
| default: |
| exit(0); |
| } |
| if (setsid() == -1) |
| die_errno(_("setsid failed")); |
| close(0); |
| close(1); |
| close(2); |
| sanitize_stdfds(); |
| return 0; |
| #endif |
| } |
| |
| struct template_dir_cb_data { |
| char *path; |
| int initialized; |
| }; |
| |
| static int template_dir_cb(const char *key, const char *value, |
| const struct config_context *ctx, void *d) |
| { |
| struct template_dir_cb_data *data = d; |
| |
| if (strcmp(key, "init.templatedir")) |
| return 0; |
| |
| if (!value) { |
| data->path = NULL; |
| } else { |
| char *path = NULL; |
| |
| FREE_AND_NULL(data->path); |
| if (!git_config_pathname((const char **)&path, key, value)) |
| data->path = path ? path : xstrdup(value); |
| } |
| |
| return 0; |
| } |
| |
| const char *get_template_dir(const char *option_template) |
| { |
| const char *template_dir = option_template; |
| |
| if (!template_dir) |
| template_dir = getenv(TEMPLATE_DIR_ENVIRONMENT); |
| if (!template_dir) { |
| static struct template_dir_cb_data data; |
| |
| if (!data.initialized) { |
| git_protected_config(template_dir_cb, &data); |
| data.initialized = 1; |
| } |
| template_dir = data.path; |
| } |
| if (!template_dir) { |
| static char *dir; |
| |
| if (!dir) |
| dir = system_path(DEFAULT_GIT_TEMPLATE_DIR); |
| template_dir = dir; |
| } |
| return template_dir; |
| } |
| |
| #ifdef NO_TRUSTABLE_FILEMODE |
| #define TEST_FILEMODE 0 |
| #else |
| #define TEST_FILEMODE 1 |
| #endif |
| |
| #define GIT_DEFAULT_HASH_ENVIRONMENT "GIT_DEFAULT_HASH" |
| |
| static void copy_templates_1(struct strbuf *path, struct strbuf *template_path, |
| DIR *dir) |
| { |
| size_t path_baselen = path->len; |
| size_t template_baselen = template_path->len; |
| struct dirent *de; |
| |
| /* Note: if ".git/hooks" file exists in the repository being |
| * re-initialized, /etc/core-git/templates/hooks/update would |
| * cause "git init" to fail here. I think this is sane but |
| * it means that the set of templates we ship by default, along |
| * with the way the namespace under .git/ is organized, should |
| * be really carefully chosen. |
| */ |
| safe_create_dir(path->buf, 1); |
| while ((de = readdir(dir)) != NULL) { |
| struct stat st_git, st_template; |
| int exists = 0; |
| |
| strbuf_setlen(path, path_baselen); |
| strbuf_setlen(template_path, template_baselen); |
| |
| if (de->d_name[0] == '.') |
| continue; |
| strbuf_addstr(path, de->d_name); |
| strbuf_addstr(template_path, de->d_name); |
| if (lstat(path->buf, &st_git)) { |
| if (errno != ENOENT) |
| die_errno(_("cannot stat '%s'"), path->buf); |
| } |
| else |
| exists = 1; |
| |
| if (lstat(template_path->buf, &st_template)) |
| die_errno(_("cannot stat template '%s'"), template_path->buf); |
| |
| if (S_ISDIR(st_template.st_mode)) { |
| DIR *subdir = opendir(template_path->buf); |
| if (!subdir) |
| die_errno(_("cannot opendir '%s'"), template_path->buf); |
| strbuf_addch(path, '/'); |
| strbuf_addch(template_path, '/'); |
| copy_templates_1(path, template_path, subdir); |
| closedir(subdir); |
| } |
| else if (exists) |
| continue; |
| else if (S_ISLNK(st_template.st_mode)) { |
| struct strbuf lnk = STRBUF_INIT; |
| if (strbuf_readlink(&lnk, template_path->buf, |
| st_template.st_size) < 0) |
| die_errno(_("cannot readlink '%s'"), template_path->buf); |
| if (symlink(lnk.buf, path->buf)) |
| die_errno(_("cannot symlink '%s' '%s'"), |
| lnk.buf, path->buf); |
| strbuf_release(&lnk); |
| } |
| else if (S_ISREG(st_template.st_mode)) { |
| if (copy_file(path->buf, template_path->buf, st_template.st_mode)) |
| die_errno(_("cannot copy '%s' to '%s'"), |
| template_path->buf, path->buf); |
| } |
| else |
| error(_("ignoring template %s"), template_path->buf); |
| } |
| } |
| |
| static void copy_templates(const char *option_template) |
| { |
| const char *template_dir = get_template_dir(option_template); |
| struct strbuf path = STRBUF_INIT; |
| struct strbuf template_path = STRBUF_INIT; |
| size_t template_len; |
| struct repository_format template_format = REPOSITORY_FORMAT_INIT; |
| struct strbuf err = STRBUF_INIT; |
| DIR *dir; |
| char *to_free = NULL; |
| |
| if (!template_dir || !*template_dir) |
| return; |
| |
| strbuf_addstr(&template_path, template_dir); |
| strbuf_complete(&template_path, '/'); |
| template_len = template_path.len; |
| |
| dir = opendir(template_path.buf); |
| if (!dir) { |
| warning(_("templates not found in %s"), template_dir); |
| goto free_return; |
| } |
| |
| /* Make sure that template is from the correct vintage */ |
| strbuf_addstr(&template_path, "config"); |
| read_repository_format(&template_format, template_path.buf); |
| strbuf_setlen(&template_path, template_len); |
| |
| /* |
| * No mention of version at all is OK, but anything else should be |
| * verified. |
| */ |
| if (template_format.version >= 0 && |
| verify_repository_format(&template_format, &err) < 0) { |
| warning(_("not copying templates from '%s': %s"), |
| template_dir, err.buf); |
| strbuf_release(&err); |
| goto close_free_return; |
| } |
| |
| strbuf_addstr(&path, get_git_common_dir()); |
| strbuf_complete(&path, '/'); |
| copy_templates_1(&path, &template_path, dir); |
| close_free_return: |
| closedir(dir); |
| free_return: |
| free(to_free); |
| strbuf_release(&path); |
| strbuf_release(&template_path); |
| clear_repository_format(&template_format); |
| } |
| |
| /* |
| * If the git_dir is not directly inside the working tree, then git will not |
| * find it by default, and we need to set the worktree explicitly. |
| */ |
| static int needs_work_tree_config(const char *git_dir, const char *work_tree) |
| { |
| if (!strcmp(work_tree, "/") && !strcmp(git_dir, "/.git")) |
| return 0; |
| if (skip_prefix(git_dir, work_tree, &git_dir) && |
| !strcmp(git_dir, "/.git")) |
| return 0; |
| return 1; |
| } |
| |
| void initialize_repository_version(int hash_algo, |
| unsigned int ref_storage_format, |
| int reinit) |
| { |
| char repo_version_string[10]; |
| int repo_version = GIT_REPO_VERSION; |
| |
| /* |
| * Note that we initialize the repository version to 1 when the ref |
| * storage format is unknown. This is on purpose so that we can add the |
| * correct object format to the config during git-clone(1). The format |
| * version will get adjusted by git-clone(1) once it has learned about |
| * the remote repository's format. |
| */ |
| if (hash_algo != GIT_HASH_SHA1 || |
| ref_storage_format != REF_STORAGE_FORMAT_FILES) |
| repo_version = GIT_REPO_VERSION_READ; |
| |
| /* This forces creation of new config file */ |
| xsnprintf(repo_version_string, sizeof(repo_version_string), |
| "%d", repo_version); |
| git_config_set("core.repositoryformatversion", repo_version_string); |
| |
| if (hash_algo != GIT_HASH_SHA1 && hash_algo != GIT_HASH_UNKNOWN) |
| git_config_set("extensions.objectformat", |
| hash_algos[hash_algo].name); |
| else if (reinit) |
| git_config_set_gently("extensions.objectformat", NULL); |
| |
| if (ref_storage_format != REF_STORAGE_FORMAT_FILES) |
| git_config_set("extensions.refstorage", |
| ref_storage_format_to_name(ref_storage_format)); |
| } |
| |
| static int is_reinit(void) |
| { |
| struct strbuf buf = STRBUF_INIT; |
| char junk[2]; |
| int ret; |
| |
| git_path_buf(&buf, "HEAD"); |
| ret = !access(buf.buf, R_OK) || readlink(buf.buf, junk, sizeof(junk) - 1) != -1; |
| strbuf_release(&buf); |
| return ret; |
| } |
| |
| void create_reference_database(unsigned int ref_storage_format, |
| const char *initial_branch, int quiet) |
| { |
| struct strbuf err = STRBUF_INIT; |
| int reinit = is_reinit(); |
| |
| repo_set_ref_storage_format(the_repository, ref_storage_format); |
| if (refs_init_db(get_main_ref_store(the_repository), 0, &err)) |
| die("failed to set up refs db: %s", err.buf); |
| |
| /* |
| * Point the HEAD symref to the initial branch with if HEAD does |
| * not yet exist. |
| */ |
| if (!reinit) { |
| char *ref; |
| |
| if (!initial_branch) |
| initial_branch = git_default_branch_name(quiet); |
| |
| ref = xstrfmt("refs/heads/%s", initial_branch); |
| if (check_refname_format(ref, 0) < 0) |
| die(_("invalid initial branch name: '%s'"), |
| initial_branch); |
| |
| if (create_symref("HEAD", ref, NULL) < 0) |
| exit(1); |
| free(ref); |
| } |
| |
| if (reinit && initial_branch) |
| warning(_("re-init: ignored --initial-branch=%s"), |
| initial_branch); |
| |
| strbuf_release(&err); |
| } |
| |
| static int create_default_files(const char *template_path, |
| const char *original_git_dir, |
| const struct repository_format *fmt, |
| int init_shared_repository) |
| { |
| struct stat st1; |
| struct strbuf buf = STRBUF_INIT; |
| char *path; |
| int reinit; |
| int filemode; |
| const char *work_tree = get_git_work_tree(); |
| |
| /* |
| * First copy the templates -- we might have the default |
| * config file there, in which case we would want to read |
| * from it after installing. |
| * |
| * Before reading that config, we also need to clear out any cached |
| * values (since we've just potentially changed what's available on |
| * disk). |
| */ |
| copy_templates(template_path); |
| git_config_clear(); |
| reset_shared_repository(); |
| git_config(git_default_config, NULL); |
| |
| reinit = is_reinit(); |
| |
| /* |
| * We must make sure command-line options continue to override any |
| * values we might have just re-read from the config. |
| */ |
| if (init_shared_repository != -1) |
| set_shared_repository(init_shared_repository); |
| |
| is_bare_repository_cfg = !work_tree; |
| |
| /* |
| * We would have created the above under user's umask -- under |
| * shared-repository settings, we would need to fix them up. |
| */ |
| if (get_shared_repository()) { |
| adjust_shared_perm(get_git_dir()); |
| } |
| |
| initialize_repository_version(fmt->hash_algo, fmt->ref_storage_format, 0); |
| |
| /* Check filemode trustability */ |
| path = git_path_buf(&buf, "config"); |
| filemode = TEST_FILEMODE; |
| if (TEST_FILEMODE && !lstat(path, &st1)) { |
| struct stat st2; |
| filemode = (!chmod(path, st1.st_mode ^ S_IXUSR) && |
| !lstat(path, &st2) && |
| st1.st_mode != st2.st_mode && |
| !chmod(path, st1.st_mode)); |
| if (filemode && !reinit && (st1.st_mode & S_IXUSR)) |
| filemode = 0; |
| } |
| git_config_set("core.filemode", filemode ? "true" : "false"); |
| |
| if (is_bare_repository()) |
| git_config_set("core.bare", "true"); |
| else { |
| git_config_set("core.bare", "false"); |
| /* allow template config file to override the default */ |
| if (log_all_ref_updates == LOG_REFS_UNSET) |
| git_config_set("core.logallrefupdates", "true"); |
| if (needs_work_tree_config(original_git_dir, work_tree)) |
| git_config_set("core.worktree", work_tree); |
| } |
| |
| if (!reinit) { |
| /* Check if symlink is supported in the work tree */ |
| path = git_path_buf(&buf, "tXXXXXX"); |
| if (!close(xmkstemp(path)) && |
| !unlink(path) && |
| !symlink("testing", path) && |
| !lstat(path, &st1) && |
| S_ISLNK(st1.st_mode)) |
| unlink(path); /* good */ |
| else |
| git_config_set("core.symlinks", "false"); |
| |
| /* Check if the filesystem is case-insensitive */ |
| path = git_path_buf(&buf, "CoNfIg"); |
| if (!access(path, F_OK)) |
| git_config_set("core.ignorecase", "true"); |
| probe_utf8_pathname_composition(); |
| } |
| |
| strbuf_release(&buf); |
| return reinit; |
| } |
| |
| static void create_object_directory(void) |
| { |
| struct strbuf path = STRBUF_INIT; |
| size_t baselen; |
| |
| strbuf_addstr(&path, get_object_directory()); |
| baselen = path.len; |
| |
| safe_create_dir(path.buf, 1); |
| |
| strbuf_setlen(&path, baselen); |
| strbuf_addstr(&path, "/pack"); |
| safe_create_dir(path.buf, 1); |
| |
| strbuf_setlen(&path, baselen); |
| strbuf_addstr(&path, "/info"); |
| safe_create_dir(path.buf, 1); |
| |
| strbuf_release(&path); |
| } |
| |
| static void separate_git_dir(const char *git_dir, const char *git_link) |
| { |
| struct stat st; |
| |
| if (!stat(git_link, &st)) { |
| const char *src; |
| |
| if (S_ISREG(st.st_mode)) |
| src = read_gitfile(git_link); |
| else if (S_ISDIR(st.st_mode)) |
| src = git_link; |
| else |
| die(_("unable to handle file type %d"), (int)st.st_mode); |
| |
| if (rename(src, git_dir)) |
| die_errno(_("unable to move %s to %s"), src, git_dir); |
| repair_worktrees(NULL, NULL); |
| } |
| |
| write_file(git_link, "gitdir: %s", git_dir); |
| } |
| |
| static void validate_hash_algorithm(struct repository_format *repo_fmt, int hash) |
| { |
| const char *env = getenv(GIT_DEFAULT_HASH_ENVIRONMENT); |
| /* |
| * If we already have an initialized repo, don't allow the user to |
| * specify a different algorithm, as that could cause corruption. |
| * Otherwise, if the user has specified one on the command line, use it. |
| */ |
| if (repo_fmt->version >= 0 && hash != GIT_HASH_UNKNOWN && hash != repo_fmt->hash_algo) |
| die(_("attempt to reinitialize repository with different hash")); |
| else if (hash != GIT_HASH_UNKNOWN) |
| repo_fmt->hash_algo = hash; |
| else if (env) { |
| int env_algo = hash_algo_by_name(env); |
| if (env_algo == GIT_HASH_UNKNOWN) |
| die(_("unknown hash algorithm '%s'"), env); |
| repo_fmt->hash_algo = env_algo; |
| } |
| } |
| |
| static void validate_ref_storage_format(struct repository_format *repo_fmt, |
| unsigned int format) |
| { |
| const char *name = getenv("GIT_DEFAULT_REF_FORMAT"); |
| |
| if (repo_fmt->version >= 0 && |
| format != REF_STORAGE_FORMAT_UNKNOWN && |
| format != repo_fmt->ref_storage_format) { |
| die(_("attempt to reinitialize repository with different reference storage format")); |
| } else if (format != REF_STORAGE_FORMAT_UNKNOWN) { |
| repo_fmt->ref_storage_format = format; |
| } else if (name) { |
| format = ref_storage_format_by_name(name); |
| if (format == REF_STORAGE_FORMAT_UNKNOWN) |
| die(_("unknown ref storage format '%s'"), name); |
| repo_fmt->ref_storage_format = format; |
| } |
| } |
| |
| int init_db(const char *git_dir, const char *real_git_dir, |
| const char *template_dir, int hash, |
| unsigned int ref_storage_format, |
| const char *initial_branch, |
| int init_shared_repository, unsigned int flags) |
| { |
| int reinit; |
| int exist_ok = flags & INIT_DB_EXIST_OK; |
| char *original_git_dir = real_pathdup(git_dir, 1); |
| struct repository_format repo_fmt = REPOSITORY_FORMAT_INIT; |
| |
| if (real_git_dir) { |
| struct stat st; |
| |
| if (!exist_ok && !stat(git_dir, &st)) |
| die(_("%s already exists"), git_dir); |
| |
| if (!exist_ok && !stat(real_git_dir, &st)) |
| die(_("%s already exists"), real_git_dir); |
| |
| set_git_dir(real_git_dir, 1); |
| git_dir = get_git_dir(); |
| separate_git_dir(git_dir, original_git_dir); |
| } |
| else { |
| set_git_dir(git_dir, 1); |
| git_dir = get_git_dir(); |
| } |
| startup_info->have_repository = 1; |
| |
| /* Ensure `core.hidedotfiles` is processed */ |
| git_config(platform_core_config, NULL); |
| |
| safe_create_dir(git_dir, 0); |
| |
| |
| /* Check to see if the repository version is right. |
| * Note that a newly created repository does not have |
| * config file, so this will not fail. What we are catching |
| * is an attempt to reinitialize new repository with an old tool. |
| */ |
| check_repository_format(&repo_fmt); |
| |
| validate_hash_algorithm(&repo_fmt, hash); |
| validate_ref_storage_format(&repo_fmt, ref_storage_format); |
| |
| reinit = create_default_files(template_dir, original_git_dir, |
| &repo_fmt, init_shared_repository); |
| |
| /* |
| * Now that we have set up both the hash algorithm and the ref storage |
| * format we can update the repository's settings accordingly. |
| */ |
| repo_set_hash_algo(the_repository, repo_fmt.hash_algo); |
| repo_set_ref_storage_format(the_repository, repo_fmt.ref_storage_format); |
| |
| if (!(flags & INIT_DB_SKIP_REFDB)) |
| create_reference_database(repo_fmt.ref_storage_format, |
| initial_branch, flags & INIT_DB_QUIET); |
| create_object_directory(); |
| |
| if (get_shared_repository()) { |
| char buf[10]; |
| /* We do not spell "group" and such, so that |
| * the configuration can be read by older version |
| * of git. Note, we use octal numbers for new share modes, |
| * and compatibility values for PERM_GROUP and |
| * PERM_EVERYBODY. |
| */ |
| if (get_shared_repository() < 0) |
| /* force to the mode value */ |
| xsnprintf(buf, sizeof(buf), "0%o", -get_shared_repository()); |
| else if (get_shared_repository() == PERM_GROUP) |
| xsnprintf(buf, sizeof(buf), "%d", OLD_PERM_GROUP); |
| else if (get_shared_repository() == PERM_EVERYBODY) |
| xsnprintf(buf, sizeof(buf), "%d", OLD_PERM_EVERYBODY); |
| else |
| BUG("invalid value for shared_repository"); |
| git_config_set("core.sharedrepository", buf); |
| git_config_set("receive.denyNonFastforwards", "true"); |
| } |
| |
| if (!(flags & INIT_DB_QUIET)) { |
| int len = strlen(git_dir); |
| |
| if (reinit) |
| printf(get_shared_repository() |
| ? _("Reinitialized existing shared Git repository in %s%s\n") |
| : _("Reinitialized existing Git repository in %s%s\n"), |
| git_dir, len && git_dir[len-1] != '/' ? "/" : ""); |
| else |
| printf(get_shared_repository() |
| ? _("Initialized empty shared Git repository in %s%s\n") |
| : _("Initialized empty Git repository in %s%s\n"), |
| git_dir, len && git_dir[len-1] != '/' ? "/" : ""); |
| } |
| |
| clear_repository_format(&repo_fmt); |
| free(original_git_dir); |
| return 0; |
| } |