/* * GIT - The information manager from hell * * Copyright (C) Linus Torvalds, 2005 * Copyright (C) Johannes Schindelin, 2005 * */ #include "cache.h" #include "date.h" #include "branch.h" #include "config.h" #include "environment.h" #include "repository.h" #include "lockfile.h" #include "exec-cmd.h" #include "strbuf.h" #include "quote.h" #include "hashmap.h" #include "string-list.h" #include "object-store.h" #include "utf8.h" #include "dir.h" #include "color.h" #include "refs.h" #include "worktree.h" struct config_source { struct config_source *prev; union { FILE *file; struct config_buf { const char *buf; size_t len; size_t pos; } buf; } u; enum config_origin_type origin_type; const char *name; const char *path; enum config_error_action default_error_action; int linenr; int eof; size_t total_len; struct strbuf value; struct strbuf var; unsigned subsection_case_sensitive : 1; int (*do_fgetc)(struct config_source *c); int (*do_ungetc)(int c, struct config_source *conf); long (*do_ftell)(struct config_source *c); }; /* * These variables record the "current" config source, which * can be accessed by parsing callbacks. * * The "cf" variable will be non-NULL only when we are actually parsing a real * config source (file, blob, cmdline, etc). * * The "current_config_kvi" variable will be non-NULL only when we are feeding * cached config from a configset into a callback. * * They should generally never be non-NULL at the same time. If they are both * NULL, then we aren't parsing anything (and depending on the function looking * at the variables, it's either a bug for it to be called in the first place, * or it's a function which can be reused for non-config purposes, and should * fall back to some sane behavior). */ static struct config_source *cf; static struct key_value_info *current_config_kvi; /* * Similar to the variables above, this gives access to the "scope" of the * current value (repo, global, etc). For cached values, it can be found via * the current_config_kvi as above. During parsing, the current value can be * found in this variable. It's not part of "cf" because it transcends a single * file (i.e., a file included from .git/config is still in "repo" scope). */ static enum config_scope current_parsing_scope; static int pack_compression_seen; static int zlib_compression_seen; static int config_file_fgetc(struct config_source *conf) { return getc_unlocked(conf->u.file); } static int config_file_ungetc(int c, struct config_source *conf) { return ungetc(c, conf->u.file); } static long config_file_ftell(struct config_source *conf) { return ftell(conf->u.file); } static int config_buf_fgetc(struct config_source *conf) { if (conf->u.buf.pos < conf->u.buf.len) return conf->u.buf.buf[conf->u.buf.pos++]; return EOF; } static int config_buf_ungetc(int c, struct config_source *conf) { if (conf->u.buf.pos > 0) { conf->u.buf.pos--; if (conf->u.buf.buf[conf->u.buf.pos] != c) BUG("config_buf can only ungetc the same character"); return c; } return EOF; } static long config_buf_ftell(struct config_source *conf) { return conf->u.buf.pos; } struct config_include_data { int depth; config_fn_t fn; void *data; const struct config_options *opts; struct git_config_source *config_source; /* * All remote URLs discovered when reading all config files. */ struct string_list *remote_urls; }; #define CONFIG_INCLUDE_INIT { 0 } static int git_config_include(const char *var, const char *value, void *data); #define MAX_INCLUDE_DEPTH 10 static const char include_depth_advice[] = N_( "exceeded maximum include depth (%d) while including\n" " %s\n" "from\n" " %s\n" "This might be due to circular includes."); static int handle_path_include(const char *path, struct config_include_data *inc) { int ret = 0; struct strbuf buf = STRBUF_INIT; char *expanded; if (!path) return config_error_nonbool("include.path"); expanded = interpolate_path(path, 0); if (!expanded) return error(_("could not expand include path '%s'"), path); path = expanded; /* * Use an absolute path as-is, but interpret relative paths * based on the including config file. */ if (!is_absolute_path(path)) { char *slash; if (!cf || !cf->path) { ret = error(_("relative config includes must come from files")); goto cleanup; } slash = find_last_dir_sep(cf->path); if (slash) strbuf_add(&buf, cf->path, slash - cf->path + 1); strbuf_addstr(&buf, path); path = buf.buf; } if (!access_or_die(path, R_OK, 0)) { if (++inc->depth > MAX_INCLUDE_DEPTH) die(_(include_depth_advice), MAX_INCLUDE_DEPTH, path, !cf ? "" : cf->name ? cf->name : "the command line"); ret = git_config_from_file(git_config_include, path, inc); inc->depth--; } cleanup: strbuf_release(&buf); free(expanded); return ret; } static void add_trailing_starstar_for_dir(struct strbuf *pat) { if (pat->len && is_dir_sep(pat->buf[pat->len - 1])) strbuf_addstr(pat, "**"); } static int prepare_include_condition_pattern(struct strbuf *pat) { struct strbuf path = STRBUF_INIT; char *expanded; int prefix = 0; expanded = interpolate_path(pat->buf, 1); if (expanded) { strbuf_reset(pat); strbuf_addstr(pat, expanded); free(expanded); } if (pat->buf[0] == '.' && is_dir_sep(pat->buf[1])) { const char *slash; if (!cf || !cf->path) return error(_("relative config include " "conditionals must come from files")); strbuf_realpath(&path, cf->path, 1); slash = find_last_dir_sep(path.buf); if (!slash) BUG("how is this possible?"); strbuf_splice(pat, 0, 1, path.buf, slash - path.buf); prefix = slash - path.buf + 1 /* slash */; } else if (!is_absolute_path(pat->buf)) strbuf_insertstr(pat, 0, "**/"); add_trailing_starstar_for_dir(pat); strbuf_release(&path); return prefix; } static int include_by_gitdir(const struct config_options *opts, const char *cond, size_t cond_len, int icase) { struct strbuf text = STRBUF_INIT; struct strbuf pattern = STRBUF_INIT; int ret = 0, prefix; const char *git_dir; int already_tried_absolute = 0; if (opts->git_dir) git_dir = opts->git_dir; else goto done; strbuf_realpath(&text, git_dir, 1); strbuf_add(&pattern, cond, cond_len); prefix = prepare_include_condition_pattern(&pattern); again: if (prefix < 0) goto done; if (prefix > 0) { /* * perform literal matching on the prefix part so that * any wildcard character in it can't create side effects. */ if (text.len < prefix) goto done; if (!icase && strncmp(pattern.buf, text.buf, prefix)) goto done; if (icase && strncasecmp(pattern.buf, text.buf, prefix)) goto done; } ret = !wildmatch(pattern.buf + prefix, text.buf + prefix, WM_PATHNAME | (icase ? WM_CASEFOLD : 0)); if (!ret && !already_tried_absolute) { /* * We've tried e.g. matching gitdir:~/work, but if * ~/work is a symlink to /mnt/storage/work * strbuf_realpath() will expand it, so the rule won't * match. Let's match against a * strbuf_add_absolute_path() version of the path, * which'll do the right thing */ strbuf_reset(&text); strbuf_add_absolute_path(&text, git_dir); already_tried_absolute = 1; goto again; } done: strbuf_release(&pattern); strbuf_release(&text); return ret; } static int include_by_branch(const char *cond, size_t cond_len) { int flags; int ret; struct strbuf pattern = STRBUF_INIT; const char *refname = !the_repository->gitdir ? NULL : resolve_ref_unsafe("HEAD", 0, NULL, &flags); const char *shortname; if (!refname || !(flags & REF_ISSYMREF) || !skip_prefix(refname, "refs/heads/", &shortname)) return 0; strbuf_add(&pattern, cond, cond_len); add_trailing_starstar_for_dir(&pattern); ret = !wildmatch(pattern.buf, shortname, WM_PATHNAME); strbuf_release(&pattern); return ret; } static int add_remote_url(const char *var, const char *value, void *data) { struct string_list *remote_urls = data; const char *remote_name; size_t remote_name_len; const char *key; if (!parse_config_key(var, "remote", &remote_name, &remote_name_len, &key) && remote_name && !strcmp(key, "url")) string_list_append(remote_urls, value); return 0; } static void populate_remote_urls(struct config_include_data *inc) { struct config_options opts; struct config_source *store_cf = cf; struct key_value_info *store_kvi = current_config_kvi; enum config_scope store_scope = current_parsing_scope; opts = *inc->opts; opts.unconditional_remote_url = 1; cf = NULL; current_config_kvi = NULL; current_parsing_scope = 0; inc->remote_urls = xmalloc(sizeof(*inc->remote_urls)); string_list_init_dup(inc->remote_urls); config_with_options(add_remote_url, inc->remote_urls, inc->config_source, &opts); cf = store_cf; current_config_kvi = store_kvi; current_parsing_scope = store_scope; } static int forbid_remote_url(const char *var, const char *value, void *data) { const char *remote_name; size_t remote_name_len; const char *key; if (!parse_config_key(var, "remote", &remote_name, &remote_name_len, &key) && remote_name && !strcmp(key, "url")) die(_("remote URLs cannot be configured in file directly or indirectly included by includeIf.hasconfig:remote.*.url")); return 0; } static int at_least_one_url_matches_glob(const char *glob, int glob_len, struct string_list *remote_urls) { struct strbuf pattern = STRBUF_INIT; struct string_list_item *url_item; int found = 0; strbuf_add(&pattern, glob, glob_len); for_each_string_list_item(url_item, remote_urls) { if (!wildmatch(pattern.buf, url_item->string, WM_PATHNAME)) { found = 1; break; } } strbuf_release(&pattern); return found; } static int include_by_remote_url(struct config_include_data *inc, const char *cond, size_t cond_len) { if (inc->opts->unconditional_remote_url) return 1; if (!inc->remote_urls) populate_remote_urls(inc); return at_least_one_url_matches_glob(cond, cond_len, inc->remote_urls); } static int include_condition_is_true(struct config_include_data *inc, const char *cond, size_t cond_len) { const struct config_options *opts = inc->opts; if (skip_prefix_mem(cond, cond_len, "gitdir:", &cond, &cond_len)) return include_by_gitdir(opts, cond, cond_len, 0); else if (skip_prefix_mem(cond, cond_len, "gitdir/i:", &cond, &cond_len)) return include_by_gitdir(opts, cond, cond_len, 1); else if (skip_prefix_mem(cond, cond_len, "onbranch:", &cond, &cond_len)) return include_by_branch(cond, cond_len); else if (skip_prefix_mem(cond, cond_len, "hasconfig:remote.*.url:", &cond, &cond_len)) return include_by_remote_url(inc, cond, cond_len); /* unknown conditionals are always false */ return 0; } static int git_config_include(const char *var, const char *value, void *data) { struct config_include_data *inc = data; const char *cond, *key; size_t cond_len; int ret; /* * Pass along all values, including "include" directives; this makes it * possible to query information on the includes themselves. */ ret = inc->fn(var, value, inc->data); if (ret < 0) return ret; if (!strcmp(var, "include.path")) ret = handle_path_include(value, inc); if (!parse_config_key(var, "includeif", &cond, &cond_len, &key) && cond && include_condition_is_true(inc, cond, cond_len) && !strcmp(key, "path")) { config_fn_t old_fn = inc->fn; if (inc->opts->unconditional_remote_url) inc->fn = forbid_remote_url; ret = handle_path_include(value, inc); inc->fn = old_fn; } return ret; } static void git_config_push_split_parameter(const char *key, const char *value) { struct strbuf env = STRBUF_INIT; const char *old = getenv(CONFIG_DATA_ENVIRONMENT); if (old && *old) { strbuf_addstr(&env, old); strbuf_addch(&env, ' '); } sq_quote_buf(&env, key); strbuf_addch(&env, '='); if (value) sq_quote_buf(&env, value); setenv(CONFIG_DATA_ENVIRONMENT, env.buf, 1); strbuf_release(&env); } void git_config_push_parameter(const char *text) { const char *value; /* * When we see: * * section.subsection=with=equals.key=value * * we cannot tell if it means: * * [section "subsection=with=equals"] * key = value * * or: * * [section] * subsection = with=equals.key=value * * We parse left-to-right for the first "=", meaning we'll prefer to * keep the value intact over the subsection. This is historical, but * also sensible since values are more likely to contain odd or * untrusted input than a section name. * * A missing equals is explicitly allowed (as a bool-only entry). */ value = strchr(text, '='); if (value) { char *key = xmemdupz(text, value - text); git_config_push_split_parameter(key, value + 1); free(key); } else { git_config_push_split_parameter(text, NULL); } } void git_config_push_env(const char *spec) { char *key; const char *env_name; const char *env_value; env_name = strrchr(spec, '='); if (!env_name) die(_("invalid config format: %s"), spec); key = xmemdupz(spec, env_name - spec); env_name++; if (!*env_name) die(_("missing environment variable name for configuration '%.*s'"), (int)(env_name - spec - 1), spec); env_value = getenv(env_name); if (!env_value) die(_("missing environment variable '%s' for configuration '%.*s'"), env_name, (int)(env_name - spec - 1), spec); git_config_push_split_parameter(key, env_value); free(key); } static inline int iskeychar(int c) { return isalnum(c) || c == '-'; } /* * Auxiliary function to sanity-check and split the key into the section * identifier and variable name. * * Returns 0 on success, -1 when there is an invalid character in the key and * -2 if there is no section name in the key. * * store_key - pointer to char* which will hold a copy of the key with * lowercase section and variable name * baselen - pointer to size_t which will hold the length of the * section + subsection part, can be NULL */ int git_config_parse_key(const char *key, char **store_key, size_t *baselen_) { size_t i, baselen; int dot; const char *last_dot = strrchr(key, '.'); /* * Since "key" actually contains the section name and the real * key name separated by a dot, we have to know where the dot is. */ if (last_dot == NULL || last_dot == key) { error(_("key does not contain a section: %s"), key); return -CONFIG_NO_SECTION_OR_NAME; } if (!last_dot[1]) { error(_("key does not contain variable name: %s"), key); return -CONFIG_NO_SECTION_OR_NAME; } baselen = last_dot - key; if (baselen_) *baselen_ = baselen; /* * Validate the key and while at it, lower case it for matching. */ *store_key = xmallocz(strlen(key)); dot = 0; for (i = 0; key[i]; i++) { unsigned char c = key[i]; if (c == '.') dot = 1; /* Leave the extended basename untouched.. */ if (!dot || i > baselen) { if (!iskeychar(c) || (i == baselen + 1 && !isalpha(c))) { error(_("invalid key: %s"), key); goto out_free_ret_1; } c = tolower(c); } else if (c == '\n') { error(_("invalid key (newline): %s"), key); goto out_free_ret_1; } (*store_key)[i] = c; } return 0; out_free_ret_1: FREE_AND_NULL(*store_key); return -CONFIG_INVALID_KEY; } static int config_parse_pair(const char *key, const char *value, config_fn_t fn, void *data) { char *canonical_name; int ret; if (!strlen(key)) return error(_("empty config key")); if (git_config_parse_key(key, &canonical_name, NULL)) return -1; ret = (fn(canonical_name, value, data) < 0) ? -1 : 0; free(canonical_name); return ret; } int git_config_parse_parameter(const char *text, config_fn_t fn, void *data) { const char *value; struct strbuf **pair; int ret; pair = strbuf_split_str(text, '=', 2); if (!pair[0]) return error(_("bogus config parameter: %s"), text); if (pair[0]->len && pair[0]->buf[pair[0]->len - 1] == '=') { strbuf_setlen(pair[0], pair[0]->len - 1); value = pair[1] ? pair[1]->buf : ""; } else { value = NULL; } strbuf_trim(pair[0]); if (!pair[0]->len) { strbuf_list_free(pair); return error(_("bogus config parameter: %s"), text); } ret = config_parse_pair(pair[0]->buf, value, fn, data); strbuf_list_free(pair); return ret; } static int parse_config_env_list(char *env, config_fn_t fn, void *data) { char *cur = env; while (cur && *cur) { const char *key = sq_dequote_step(cur, &cur); if (!key) return error(_("bogus format in %s"), CONFIG_DATA_ENVIRONMENT); if (!cur || isspace(*cur)) { /* old-style 'key=value' */ if (git_config_parse_parameter(key, fn, data) < 0) return -1; } else if (*cur == '=') { /* new-style 'key'='value' */ const char *value; cur++; if (*cur == '\'') { /* quoted value */ value = sq_dequote_step(cur, &cur); if (!value || (cur && !isspace(*cur))) { return error(_("bogus format in %s"), CONFIG_DATA_ENVIRONMENT); } } else if (!*cur || isspace(*cur)) { /* implicit bool: 'key'= */ value = NULL; } else { return error(_("bogus format in %s"), CONFIG_DATA_ENVIRONMENT); } if (config_parse_pair(key, value, fn, data) < 0) return -1; } else { /* unknown format */ return error(_("bogus format in %s"), CONFIG_DATA_ENVIRONMENT); } if (cur) { while (isspace(*cur)) cur++; } } return 0; } int git_config_from_parameters(config_fn_t fn, void *data) { const char *env; struct strbuf envvar = STRBUF_INIT; struct strvec to_free = STRVEC_INIT; int ret = 0; char *envw = NULL; struct config_source source; memset(&source, 0, sizeof(source)); source.prev = cf; source.origin_type = CONFIG_ORIGIN_CMDLINE; cf = &source; env = getenv(CONFIG_COUNT_ENVIRONMENT); if (env) { unsigned long count; char *endp; int i; count = strtoul(env, &endp, 10); if (*endp) { ret = error(_("bogus count in %s"), CONFIG_COUNT_ENVIRONMENT); goto out; } if (count > INT_MAX) { ret = error(_("too many entries in %s"), CONFIG_COUNT_ENVIRONMENT); goto out; } for (i = 0; i < count; i++) { const char *key, *value; strbuf_addf(&envvar, "GIT_CONFIG_KEY_%d", i); key = getenv_safe(&to_free, envvar.buf); if (!key) { ret = error(_("missing config key %s"), envvar.buf); goto out; } strbuf_reset(&envvar); strbuf_addf(&envvar, "GIT_CONFIG_VALUE_%d", i); value = getenv_safe(&to_free, envvar.buf); if (!value) { ret = error(_("missing config value %s"), envvar.buf); goto out; } strbuf_reset(&envvar); if (config_parse_pair(key, value, fn, data) < 0) { ret = -1; goto out; } } } env = getenv(CONFIG_DATA_ENVIRONMENT); if (env) { /* sq_dequote will write over it */ envw = xstrdup(env); if (parse_config_env_list(envw, fn, data) < 0) { ret = -1; goto out; } } out: strbuf_release(&envvar); strvec_clear(&to_free); free(envw); cf = source.prev; return ret; } static int get_next_char(void) { int c = cf->do_fgetc(cf); if (c == '\r') { /* DOS like systems */ c = cf->do_fgetc(cf); if (c != '\n') { if (c != EOF) cf->do_ungetc(c, cf); c = '\r'; } } if (c != EOF && ++cf->total_len > INT_MAX) { /* * This is an absurdly long config file; refuse to parse * further in order to protect downstream code from integer * overflows. Note that we can't return an error specifically, * but we can mark EOF and put trash in the return value, * which will trigger a parse error. */ cf->eof = 1; return 0; } if (c == '\n') cf->linenr++; if (c == EOF) { cf->eof = 1; cf->linenr++; c = '\n'; } return c; } static char *parse_value(void) { int quote = 0, comment = 0, space = 0; strbuf_reset(&cf->value); for (;;) { int c = get_next_char(); if (c == '\n') { if (quote) { cf->linenr--; return NULL; } return cf->value.buf; } if (comment) continue; if (isspace(c) && !quote) { if (cf->value.len) space++; continue; } if (!quote) { if (c == ';' || c == '#') { comment = 1; continue; } } for (; space; space--) strbuf_addch(&cf->value, ' '); if (c == '\\') { c = get_next_char(); switch (c) { case '\n': continue; case 't': c = '\t'; break; case 'b': c = '\b'; break; case 'n': c = '\n'; break; /* Some characters escape as themselves */ case '\\': case '"': break; /* Reject unknown escape sequences */ default: return NULL; } strbuf_addch(&cf->value, c); continue; } if (c == '"') { quote = 1-quote; continue; } strbuf_addch(&cf->value, c); } } static int get_value(config_fn_t fn, void *data, struct strbuf *name) { int c; char *value; int ret; /* Get the full name */ for (;;) { c = get_next_char(); if (cf->eof) break; if (!iskeychar(c)) break; strbuf_addch(name, tolower(c)); } while (c == ' ' || c == '\t') c = get_next_char(); value = NULL; if (c != '\n') { if (c != '=') return -1; value = parse_value(); if (!value) return -1; } /* * We already consumed the \n, but we need linenr to point to * the line we just parsed during the call to fn to get * accurate line number in error messages. */ cf->linenr--; ret = fn(name->buf, value, data); if (ret >= 0) cf->linenr++; return ret; } static int get_extended_base_var(struct strbuf *name, int c) { cf->subsection_case_sensitive = 0; do { if (c == '\n') goto error_incomplete_line; c = get_next_char(); } while (isspace(c)); /* We require the format to be '[base "extension"]' */ if (c != '"') return -1; strbuf_addch(name, '.'); for (;;) { int c = get_next_char(); if (c == '\n') goto error_incomplete_line; if (c == '"') break; if (c == '\\') { c = get_next_char(); if (c == '\n') goto error_incomplete_line; } strbuf_addch(name, c); } /* Final ']' */ if (get_next_char() != ']') return -1; return 0; error_incomplete_line: cf->linenr--; return -1; } static int get_base_var(struct strbuf *name) { cf->subsection_case_sensitive = 1; for (;;) { int c = get_next_char(); if (cf->eof) return -1; if (c == ']') return 0; if (isspace(c)) return get_extended_base_var(name, c); if (!iskeychar(c) && c != '.') return -1; strbuf_addch(name, tolower(c)); } } struct parse_event_data { enum config_event_t previous_type; size_t previous_offset; const struct config_options *opts; }; static int do_event(enum config_event_t type, struct parse_event_data *data) { size_t offset; if (!data->opts || !data->opts->event_fn) return 0; if (type == CONFIG_EVENT_WHITESPACE && data->previous_type == type) return 0; offset = cf->do_ftell(cf); /* * At EOF, the parser always "inserts" an extra '\n', therefore * the end offset of the event is the current file position, otherwise * we will already have advanced to the next event. */ if (type != CONFIG_EVENT_EOF) offset--; if (data->previous_type != CONFIG_EVENT_EOF && data->opts->event_fn(data->previous_type, data->previous_offset, offset, data->opts->event_fn_data) < 0) return -1; data->previous_type = type; data->previous_offset = offset; return 0; } static int git_parse_source(config_fn_t fn, void *data, const struct config_options *opts) { int comment = 0; size_t baselen = 0; struct strbuf *var = &cf->var; int error_return = 0; char *error_msg = NULL; /* U+FEFF Byte Order Mark in UTF8 */ const char *bomptr = utf8_bom; /* For the parser event callback */ struct parse_event_data event_data = { CONFIG_EVENT_EOF, 0, opts }; for (;;) { int c; c = get_next_char(); if (bomptr && *bomptr) { /* We are at the file beginning; skip UTF8-encoded BOM * if present. Sane editors won't put this in on their * own, but e.g. Windows Notepad will do it happily. */ if (c == (*bomptr & 0377)) { bomptr++; continue; } else { /* Do not tolerate partial BOM. */ if (bomptr != utf8_bom) break; /* No BOM at file beginning. Cool. */ bomptr = NULL; } } if (c == '\n') { if (cf->eof) { if (do_event(CONFIG_EVENT_EOF, &event_data) < 0) return -1; return 0; } if (do_event(CONFIG_EVENT_WHITESPACE, &event_data) < 0) return -1; comment = 0; continue; } if (comment) continue; if (isspace(c)) { if (do_event(CONFIG_EVENT_WHITESPACE, &event_data) < 0) return -1; continue; } if (c == '#' || c == ';') { if (do_event(CONFIG_EVENT_COMMENT, &event_data) < 0) return -1; comment = 1; continue; } if (c == '[') { if (do_event(CONFIG_EVENT_SECTION, &event_data) < 0) return -1; /* Reset prior to determining a new stem */ strbuf_reset(var); if (get_base_var(var) < 0 || var->len < 1) break; strbuf_addch(var, '.'); baselen = var->len; continue; } if (!isalpha(c)) break; if (do_event(CONFIG_EVENT_ENTRY, &event_data) < 0) return -1; /* * Truncate the var name back to the section header * stem prior to grabbing the suffix part of the name * and the value. */ strbuf_setlen(var, baselen); strbuf_addch(var, tolower(c)); if (get_value(fn, data, var) < 0) break; } if (do_event(CONFIG_EVENT_ERROR, &event_data) < 0) return -1; switch (cf->origin_type) { case CONFIG_ORIGIN_BLOB: error_msg = xstrfmt(_("bad config line %d in blob %s"), cf->linenr, cf->name); break; case CONFIG_ORIGIN_FILE: error_msg = xstrfmt(_("bad config line %d in file %s"), cf->linenr, cf->name); break; case CONFIG_ORIGIN_STDIN: error_msg = xstrfmt(_("bad config line %d in standard input"), cf->linenr); break; case CONFIG_ORIGIN_SUBMODULE_BLOB: error_msg = xstrfmt(_("bad config line %d in submodule-blob %s"), cf->linenr, cf->name); break; case CONFIG_ORIGIN_CMDLINE: error_msg = xstrfmt(_("bad config line %d in command line %s"), cf->linenr, cf->name); break; default: error_msg = xstrfmt(_("bad config line %d in %s"), cf->linenr, cf->name); } switch (opts && opts->error_action ? opts->error_action : cf->default_error_action) { case CONFIG_ERROR_DIE: die("%s", error_msg); break; case CONFIG_ERROR_ERROR: error_return = error("%s", error_msg); break; case CONFIG_ERROR_SILENT: error_return = -1; break; case CONFIG_ERROR_UNSET: BUG("config error action unset"); } free(error_msg); return error_return; } static uintmax_t get_unit_factor(const char *end) { if (!*end) return 1; else if (!strcasecmp(end, "k")) return 1024; else if (!strcasecmp(end, "m")) return 1024 * 1024; else if (!strcasecmp(end, "g")) return 1024 * 1024 * 1024; return 0; } static int git_parse_signed(const char *value, intmax_t *ret, intmax_t max) { if (value && *value) { char *end; intmax_t val; uintmax_t uval; uintmax_t factor; errno = 0; val = strtoimax(value, &end, 0); if (errno == ERANGE) return 0; factor = get_unit_factor(end); if (!factor) { errno = EINVAL; return 0; } uval = val < 0 ? -val : val; if (unsigned_mult_overflows(factor, uval) || factor * uval > max) { errno = ERANGE; return 0; } val *= factor; *ret = val; return 1; } errno = EINVAL; return 0; } static int git_parse_unsigned(const char *value, uintmax_t *ret, uintmax_t max) { if (value && *value) { char *end; uintmax_t val; uintmax_t factor; errno = 0; val = strtoumax(value, &end, 0); if (errno == ERANGE) return 0; factor = get_unit_factor(end); if (!factor) { errno = EINVAL; return 0; } if (unsigned_mult_overflows(factor, val) || factor * val > max) { errno = ERANGE; return 0; } val *= factor; *ret = val; return 1; } errno = EINVAL; return 0; } static int git_parse_int(const char *value, int *ret) { intmax_t tmp; if (!git_parse_signed(value, &tmp, maximum_signed_value_of_type(int))) return 0; *ret = tmp; return 1; } static int git_parse_int64(const char *value, int64_t *ret) { intmax_t tmp; if (!git_parse_signed(value, &tmp, maximum_signed_value_of_type(int64_t))) return 0; *ret = tmp; return 1; } int git_parse_ulong(const char *value, unsigned long *ret) { uintmax_t tmp; if (!git_parse_unsigned(value, &tmp, maximum_unsigned_value_of_type(long))) return 0; *ret = tmp; return 1; } int git_parse_ssize_t(const char *value, ssize_t *ret) { intmax_t tmp; if (!git_parse_signed(value, &tmp, maximum_signed_value_of_type(ssize_t))) return 0; *ret = tmp; return 1; } NORETURN static void die_bad_number(const char *name, const char *value) { const char *error_type = (errno == ERANGE) ? N_("out of range") : N_("invalid unit"); const char *bad_numeric = N_("bad numeric config value '%s' for '%s': %s"); if (!value) value = ""; if (!(cf && cf->name)) die(_(bad_numeric), value, name, _(error_type)); switch (cf->origin_type) { case CONFIG_ORIGIN_BLOB: die(_("bad numeric config value '%s' for '%s' in blob %s: %s"), value, name, cf->name, _(error_type)); case CONFIG_ORIGIN_FILE: die(_("bad numeric config value '%s' for '%s' in file %s: %s"), value, name, cf->name, _(error_type)); case CONFIG_ORIGIN_STDIN: die(_("bad numeric config value '%s' for '%s' in standard input: %s"), value, name, _(error_type)); case CONFIG_ORIGIN_SUBMODULE_BLOB: die(_("bad numeric config value '%s' for '%s' in submodule-blob %s: %s"), value, name, cf->name, _(error_type)); case CONFIG_ORIGIN_CMDLINE: die(_("bad numeric config value '%s' for '%s' in command line %s: %s"), value, name, cf->name, _(error_type)); default: die(_("bad numeric config value '%s' for '%s' in %s: %s"), value, name, cf->name, _(error_type)); } } int git_config_int(const char *name, const char *value) { int ret; if (!git_parse_int(value, &ret)) die_bad_number(name, value); return ret; } int64_t git_config_int64(const char *name, const char *value) { int64_t ret; if (!git_parse_int64(value, &ret)) die_bad_number(name, value); return ret; } unsigned long git_config_ulong(const char *name, const char *value) { unsigned long ret; if (!git_parse_ulong(value, &ret)) die_bad_number(name, value); return ret; } ssize_t git_config_ssize_t(const char *name, const char *value) { ssize_t ret; if (!git_parse_ssize_t(value, &ret)) die_bad_number(name, value); return ret; } static int git_parse_maybe_bool_text(const char *value) { if (!value) return 1; if (!*value) return 0; if (!strcasecmp(value, "true") || !strcasecmp(value, "yes") || !strcasecmp(value, "on")) return 1; if (!strcasecmp(value, "false") || !strcasecmp(value, "no") || !strcasecmp(value, "off")) return 0; return -1; } static const struct fsync_component_name { const char *name; enum fsync_component component_bits; } fsync_component_names[] = { { "loose-object", FSYNC_COMPONENT_LOOSE_OBJECT }, { "pack", FSYNC_COMPONENT_PACK }, { "pack-metadata", FSYNC_COMPONENT_PACK_METADATA }, { "commit-graph", FSYNC_COMPONENT_COMMIT_GRAPH }, { "index", FSYNC_COMPONENT_INDEX }, }; static enum fsync_component parse_fsync_components(const char *var, const char *string) { enum fsync_component current = FSYNC_COMPONENTS_DEFAULT; enum fsync_component positive = 0, negative = 0; while (string) { int i; size_t len; const char *ep; int negated = 0; int found = 0; string = string + strspn(string, ", \t\n\r"); ep = strchrnul(string, ','); len = ep - string; if (!strcmp(string, "none")) { current = FSYNC_COMPONENT_NONE; goto next_name; } if (*string == '-') { negated = 1; string++; len--; if (!len) warning(_("invalid value for variable %s"), var); } if (!len) break; for (i = 0; i < ARRAY_SIZE(fsync_component_names); ++i) { const struct fsync_component_name *n = &fsync_component_names[i]; if (strncmp(n->name, string, len)) continue; found = 1; if (negated) negative |= n->component_bits; else positive |= n->component_bits; } if (!found) { char *component = xstrndup(string, len); warning(_("ignoring unknown core.fsync component '%s'"), component); free(component); } next_name: string = ep; } return (current & ~negative) | positive; } int git_parse_maybe_bool(const char *value) { int v = git_parse_maybe_bool_text(value); if (0 <= v) return v; if (git_parse_int(value, &v)) return !!v; return -1; } int git_config_bool_or_int(const char *name, const char *value, int *is_bool) { int v = git_parse_maybe_bool_text(value); if (0 <= v) { *is_bool = 1; return v; } *is_bool = 0; return git_config_int(name, value); } int git_config_bool(const char *name, const char *value) { int v = git_parse_maybe_bool(value); if (v < 0) die(_("bad boolean config value '%s' for '%s'"), value, name); return v; } int git_config_string(const char **dest, const char *var, const char *value) { if (!value) return config_error_nonbool(var); *dest = xstrdup(value); return 0; } int git_config_pathname(const char **dest, const char *var, const char *value) { if (!value) return config_error_nonbool(var); *dest = interpolate_path(value, 0); if (!*dest) die(_("failed to expand user dir in: '%s'"), value); return 0; } int git_config_expiry_date(timestamp_t *timestamp, const char *var, const char *value) { if (!value) return config_error_nonbool(var); if (parse_expiry_date(value, timestamp)) return error(_("'%s' for '%s' is not a valid timestamp"), value, var); return 0; } int git_config_color(char *dest, const char *var, const char *value) { if (!value) return config_error_nonbool(var); if (color_parse(value, dest) < 0) return -1; return 0; } static int git_default_core_config(const char *var, const char *value, void *cb) { /* This needs a better name */ if (!strcmp(var, "core.filemode")) { trust_executable_bit = git_config_bool(var, value); return 0; } if (!strcmp(var, "core.trustctime")) { trust_ctime = git_config_bool(var, value); return 0; } if (!strcmp(var, "core.checkstat")) { if (!strcasecmp(value, "default")) check_stat = 1; else if (!strcasecmp(value, "minimal")) check_stat = 0; } if (!strcmp(var, "core.quotepath")) { quote_path_fully = git_config_bool(var, value); return 0; } if (!strcmp(var, "core.symlinks")) { has_symlinks = git_config_bool(var, value); return 0; } if (!strcmp(var, "core.ignorecase")) { ignore_case = git_config_bool(var, value); return 0; } if (!strcmp(var, "core.attributesfile")) return git_config_pathname(&git_attributes_file, var, value); if (!strcmp(var, "core.hookspath")) return git_config_pathname(&git_hooks_path, var, value); if (!strcmp(var, "core.bare")) { is_bare_repository_cfg = git_config_bool(var, value); return 0; } if (!strcmp(var, "core.ignorestat")) { assume_unchanged = git_config_bool(var, value); return 0; } if (!strcmp(var, "core.prefersymlinkrefs")) { prefer_symlink_refs = git_config_bool(var, value); return 0; } if (!strcmp(var, "core.logallrefupdates")) { if (value && !strcasecmp(value, "always")) log_all_ref_updates = LOG_REFS_ALWAYS; else if (git_config_bool(var, value)) log_all_ref_updates = LOG_REFS_NORMAL; else log_all_ref_updates = LOG_REFS_NONE; return 0; } if (!strcmp(var, "core.warnambiguousrefs")) { warn_ambiguous_refs = git_config_bool(var, value); return 0; } if (!strcmp(var, "core.abbrev")) { if (!value) return config_error_nonbool(var); if (!strcasecmp(value, "auto")) default_abbrev = -1; else if (!git_parse_maybe_bool_text(value)) default_abbrev = the_hash_algo->hexsz; else { int abbrev = git_config_int(var, value); if (abbrev < minimum_abbrev || abbrev > the_hash_algo->hexsz) return error(_("abbrev length out of range: %d"), abbrev); default_abbrev = abbrev; } return 0; } if (!strcmp(var, "core.disambiguate")) return set_disambiguate_hint_config(var, value); if (!strcmp(var, "core.loosecompression")) { int level = git_config_int(var, value); if (level == -1) level = Z_DEFAULT_COMPRESSION; else if (level < 0 || level > Z_BEST_COMPRESSION) die(_("bad zlib compression level %d"), level); zlib_compression_level = level; zlib_compression_seen = 1; return 0; } if (!strcmp(var, "core.compression")) { int level = git_config_int(var, value); if (level == -1) level = Z_DEFAULT_COMPRESSION; else if (level < 0 || level > Z_BEST_COMPRESSION) die(_("bad zlib compression level %d"), level); if (!zlib_compression_seen) zlib_compression_level = level; if (!pack_compression_seen) pack_compression_level = level; return 0; } if (!strcmp(var, "core.packedgitwindowsize")) { int pgsz_x2 = getpagesize() * 2; packed_git_window_size = git_config_ulong(var, value); /* This value must be multiple of (pagesize * 2) */ packed_git_window_size /= pgsz_x2; if (packed_git_window_size < 1) packed_git_window_size = 1; packed_git_window_size *= pgsz_x2; return 0; } if (!strcmp(var, "core.bigfilethreshold")) { big_file_threshold = git_config_ulong(var, value); return 0; } if (!strcmp(var, "core.packedgitlimit")) { packed_git_limit = git_config_ulong(var, value); return 0; } if (!strcmp(var, "core.deltabasecachelimit")) { delta_base_cache_limit = git_config_ulong(var, value); return 0; } if (!strcmp(var, "core.autocrlf")) { if (value && !strcasecmp(value, "input")) { auto_crlf = AUTO_CRLF_INPUT; return 0; } auto_crlf = git_config_bool(var, value); return 0; } if (!strcmp(var, "core.safecrlf")) { int eol_rndtrp_die; if (value && !strcasecmp(value, "warn")) { global_conv_flags_eol = CONV_EOL_RNDTRP_WARN; return 0; } eol_rndtrp_die = git_config_bool(var, value); global_conv_flags_eol = eol_rndtrp_die ? CONV_EOL_RNDTRP_DIE : 0; return 0; } if (!strcmp(var, "core.eol")) { if (value && !strcasecmp(value, "lf")) core_eol = EOL_LF; else if (value && !strcasecmp(value, "crlf")) core_eol = EOL_CRLF; else if (value && !strcasecmp(value, "native")) core_eol = EOL_NATIVE; else core_eol = EOL_UNSET; return 0; } if (!strcmp(var, "core.checkroundtripencoding")) { check_roundtrip_encoding = xstrdup(value); return 0; } if (!strcmp(var, "core.notesref")) { notes_ref_name = xstrdup(value); return 0; } if (!strcmp(var, "core.editor")) return git_config_string(&editor_program, var, value); if (!strcmp(var, "core.commentchar")) { if (!value) return config_error_nonbool(var); else if (!strcasecmp(value, "auto")) auto_comment_line_char = 1; else if (value[0] && !value[1]) { comment_line_char = value[0]; auto_comment_line_char = 0; } else return error(_("core.commentChar should only be one character")); return 0; } if (!strcmp(var, "core.askpass")) return git_config_string(&askpass_program, var, value); if (!strcmp(var, "core.excludesfile")) return git_config_pathname(&excludes_file, var, value); if (!strcmp(var, "core.whitespace")) { if (!value) return config_error_nonbool(var); whitespace_rule_cfg = parse_whitespace_rule(value); return 0; } if (!strcmp(var, "core.fsync")) { if (!value) return config_error_nonbool(var); fsync_components = parse_fsync_components(var, value); return 0; } if (!strcmp(var, "core.fsyncmethod")) { if (!value) return config_error_nonbool(var); if (!strcmp(value, "fsync")) fsync_method = FSYNC_METHOD_FSYNC; else if (!strcmp(value, "writeout-only")) fsync_method = FSYNC_METHOD_WRITEOUT_ONLY; else warning(_("ignoring unknown core.fsyncMethod value '%s'"), value); } if (!strcmp(var, "core.fsyncobjectfiles")) { if (fsync_object_files < 0) warning(_("core.fsyncobjectfiles is deprecated; use core.fsync instead")); fsync_object_files = git_config_bool(var, value); return 0; } if (!strcmp(var, "core.preloadindex")) { core_preload_index = git_config_bool(var, value); return 0; } if (!strcmp(var, "core.createobject")) { if (!strcmp(value, "rename")) object_creation_mode = OBJECT_CREATION_USES_RENAMES; else if (!strcmp(value, "link")) object_creation_mode = OBJECT_CREATION_USES_HARDLINKS; else die(_("invalid mode for object creation: %s"), value); return 0; } if (!strcmp(var, "core.sparsecheckout")) { core_apply_sparse_checkout = git_config_bool(var, value); return 0; } if (!strcmp(var, "core.sparsecheckoutcone")) { core_sparse_checkout_cone = git_config_bool(var, value); return 0; } if (!strcmp(var, "core.precomposeunicode")) { precomposed_unicode = git_config_bool(var, value); return 0; } if (!strcmp(var, "core.protecthfs")) { protect_hfs = git_config_bool(var, value); return 0; } if (!strcmp(var, "core.protectntfs")) { protect_ntfs = git_config_bool(var, value); return 0; } if (!strcmp(var, "core.usereplacerefs")) { read_replace_refs = git_config_bool(var, value); return 0; } /* Add other config variables here and to Documentation/config.txt. */ return platform_core_config(var, value, cb); } static int git_default_i18n_config(const char *var, const char *value) { if (!strcmp(var, "i18n.commitencoding")) return git_config_string(&git_commit_encoding, var, value); if (!strcmp(var, "i18n.logoutputencoding")) return git_config_string(&git_log_output_encoding, var, value); /* Add other config variables here and to Documentation/config.txt. */ return 0; } static int git_default_branch_config(const char *var, const char *value) { if (!strcmp(var, "branch.autosetupmerge")) { if (value && !strcmp(value, "always")) { git_branch_track = BRANCH_TRACK_ALWAYS; return 0; } else if (value && !strcmp(value, "inherit")) { git_branch_track = BRANCH_TRACK_INHERIT; return 0; } git_branch_track = git_config_bool(var, value); return 0; } if (!strcmp(var, "branch.autosetuprebase")) { if (!value) return config_error_nonbool(var); else if (!strcmp(value, "never")) autorebase = AUTOREBASE_NEVER; else if (!strcmp(value, "local")) autorebase = AUTOREBASE_LOCAL; else if (!strcmp(value, "remote")) autorebase = AUTOREBASE_REMOTE; else if (!strcmp(value, "always")) autorebase = AUTOREBASE_ALWAYS; else return error(_("malformed value for %s"), var); return 0; } /* Add other config variables here and to Documentation/config.txt. */ return 0; } static int git_default_push_config(const char *var, const char *value) { if (!strcmp(var, "push.default")) { if (!value) return config_error_nonbool(var); else if (!strcmp(value, "nothing")) push_default = PUSH_DEFAULT_NOTHING; else if (!strcmp(value, "matching")) push_default = PUSH_DEFAULT_MATCHING; else if (!strcmp(value, "simple")) push_default = PUSH_DEFAULT_SIMPLE; else if (!strcmp(value, "upstream")) push_default = PUSH_DEFAULT_UPSTREAM; else if (!strcmp(value, "tracking")) /* deprecated */ push_default = PUSH_DEFAULT_UPSTREAM; else if (!strcmp(value, "current")) push_default = PUSH_DEFAULT_CURRENT; else { error(_("malformed value for %s: %s"), var, value); return error(_("must be one of nothing, matching, simple, " "upstream or current")); } return 0; } /* Add other config variables here and to Documentation/config.txt. */ return 0; } static int git_default_mailmap_config(const char *var, const char *value) { if (!strcmp(var, "mailmap.file")) return git_config_pathname(&git_mailmap_file, var, value); if (!strcmp(var, "mailmap.blob")) return git_config_string(&git_mailmap_blob, var, value); /* Add other config variables here and to Documentation/config.txt. */ return 0; } int git_default_config(const char *var, const char *value, void *cb) { if (starts_with(var, "core.")) return git_default_core_config(var, value, cb); if (starts_with(var, "user.") || starts_with(var, "author.") || starts_with(var, "committer.")) return git_ident_config(var, value, cb); if (starts_with(var, "i18n.")) return git_default_i18n_config(var, value); if (starts_with(var, "branch.")) return git_default_branch_config(var, value); if (starts_with(var, "push.")) return git_default_push_config(var, value); if (starts_with(var, "mailmap.")) return git_default_mailmap_config(var, value); if (starts_with(var, "advice.") || starts_with(var, "color.advice")) return git_default_advice_config(var, value); if (!strcmp(var, "pager.color") || !strcmp(var, "color.pager")) { pager_use_color = git_config_bool(var,value); return 0; } if (!strcmp(var, "pack.packsizelimit")) { pack_size_limit_cfg = git_config_ulong(var, value); return 0; } if (!strcmp(var, "pack.compression")) { int level = git_config_int(var, value); if (level == -1) level = Z_DEFAULT_COMPRESSION; else if (level < 0 || level > Z_BEST_COMPRESSION) die(_("bad pack compression level %d"), level); pack_compression_level = level; pack_compression_seen = 1; return 0; } /* Add other config variables here and to Documentation/config.txt. */ return 0; } /* * All source specific fields in the union, die_on_error, name and the callbacks * fgetc, ungetc, ftell of top need to be initialized before calling * this function. */ static int do_config_from(struct config_source *top, config_fn_t fn, void *data, const struct config_options *opts) { int ret; /* push config-file parsing state stack */ top->prev = cf; top->linenr = 1; top->eof = 0; top->total_len = 0; strbuf_init(&top->value, 1024); strbuf_init(&top->var, 1024); cf = top; ret = git_parse_source(fn, data, opts); /* pop config-file parsing state stack */ strbuf_release(&top->value); strbuf_release(&top->var); cf = top->prev; return ret; } static int do_config_from_file(config_fn_t fn, const enum config_origin_type origin_type, const char *name, const char *path, FILE *f, void *data, const struct config_options *opts) { struct config_source top; int ret; top.u.file = f; top.origin_type = origin_type; top.name = name; top.path = path; top.default_error_action = CONFIG_ERROR_DIE; top.do_fgetc = config_file_fgetc; top.do_ungetc = config_file_ungetc; top.do_ftell = config_file_ftell; flockfile(f); ret = do_config_from(&top, fn, data, opts); funlockfile(f); return ret; } static int git_config_from_stdin(config_fn_t fn, void *data) { return do_config_from_file(fn, CONFIG_ORIGIN_STDIN, "", NULL, stdin, data, NULL); } int git_config_from_file_with_options(config_fn_t fn, const char *filename, void *data, const struct config_options *opts) { int ret = -1; FILE *f; f = fopen_or_warn(filename, "r"); if (f) { ret = do_config_from_file(fn, CONFIG_ORIGIN_FILE, filename, filename, f, data, opts); fclose(f); } return ret; } int git_config_from_file(config_fn_t fn, const char *filename, void *data) { return git_config_from_file_with_options(fn, filename, data, NULL); } int git_config_from_mem(config_fn_t fn, const enum config_origin_type origin_type, const char *name, const char *buf, size_t len, void *data, const struct config_options *opts) { struct config_source top; top.u.buf.buf = buf; top.u.buf.len = len; top.u.buf.pos = 0; top.origin_type = origin_type; top.name = name; top.path = NULL; top.default_error_action = CONFIG_ERROR_ERROR; top.do_fgetc = config_buf_fgetc; top.do_ungetc = config_buf_ungetc; top.do_ftell = config_buf_ftell; return do_config_from(&top, fn, data, opts); } int git_config_from_blob_oid(config_fn_t fn, const char *name, struct repository *repo, const struct object_id *oid, void *data) { enum object_type type; char *buf; unsigned long size; int ret; buf = repo_read_object_file(repo, oid, &type, &size); if (!buf) return error(_("unable to load config blob object '%s'"), name); if (type != OBJ_BLOB) { free(buf); return error(_("reference '%s' does not point to a blob"), name); } ret = git_config_from_mem(fn, CONFIG_ORIGIN_BLOB, name, buf, size, data, NULL); free(buf); return ret; } static int git_config_from_blob_ref(config_fn_t fn, struct repository *repo, const char *name, void *data) { struct object_id oid; if (repo_get_oid(repo, name, &oid) < 0) return error(_("unable to resolve config blob '%s'"), name); return git_config_from_blob_oid(fn, name, repo, &oid, data); } char *git_system_config(void) { char *system_config = xstrdup_or_null(getenv("GIT_CONFIG_SYSTEM")); if (!system_config) system_config = system_path(ETC_GITCONFIG); normalize_path_copy(system_config, system_config); return system_config; } void git_global_config(char **user_out, char **xdg_out) { char *user_config = xstrdup_or_null(getenv("GIT_CONFIG_GLOBAL")); char *xdg_config = NULL; if (!user_config) { user_config = interpolate_path("~/.gitconfig", 0); xdg_config = xdg_config_home("config"); } *user_out = user_config; *xdg_out = xdg_config; } /* * Parse environment variable 'k' as a boolean (in various * possible spellings); if missing, use the default value 'def'. */ int git_env_bool(const char *k, int def) { const char *v = getenv(k); return v ? git_config_bool(k, v) : def; } /* * Parse environment variable 'k' as ulong with possibly a unit * suffix; if missing, use the default value 'val'. */ unsigned long git_env_ulong(const char *k, unsigned long val) { const char *v = getenv(k); if (v && !git_parse_ulong(v, &val)) die(_("failed to parse %s"), k); return val; } int git_config_system(void) { return !git_env_bool("GIT_CONFIG_NOSYSTEM", 0); } static int do_git_config_sequence(const struct config_options *opts, config_fn_t fn, void *data) { int ret = 0; char *system_config = git_system_config(); char *xdg_config = NULL; char *user_config = NULL; char *repo_config; enum config_scope prev_parsing_scope = current_parsing_scope; if (opts->commondir) repo_config = mkpathdup("%s/config", opts->commondir); else if (opts->git_dir) BUG("git_dir without commondir"); else repo_config = NULL; current_parsing_scope = CONFIG_SCOPE_SYSTEM; if (git_config_system() && system_config && !access_or_die(system_config, R_OK, opts->system_gently ? ACCESS_EACCES_OK : 0)) ret += git_config_from_file(fn, system_config, data); current_parsing_scope = CONFIG_SCOPE_GLOBAL; git_global_config(&user_config, &xdg_config); if (xdg_config && !access_or_die(xdg_config, R_OK, ACCESS_EACCES_OK)) ret += git_config_from_file(fn, xdg_config, data); if (user_config && !access_or_die(user_config, R_OK, ACCESS_EACCES_OK)) ret += git_config_from_file(fn, user_config, data); current_parsing_scope = CONFIG_SCOPE_LOCAL; if (!opts->ignore_repo && repo_config && !access_or_die(repo_config, R_OK, 0)) ret += git_config_from_file(fn, repo_config, data); current_parsing_scope = CONFIG_SCOPE_WORKTREE; if (!opts->ignore_worktree && repository_format_worktree_config) { char *path = git_pathdup("config.worktree"); if (!access_or_die(path, R_OK, 0)) ret += git_config_from_file(fn, path, data); free(path); } current_parsing_scope = CONFIG_SCOPE_COMMAND; if (!opts->ignore_cmdline && git_config_from_parameters(fn, data) < 0) die(_("unable to parse command-line config")); current_parsing_scope = prev_parsing_scope; free(system_config); free(xdg_config); free(user_config); free(repo_config); return ret; } int config_with_options(config_fn_t fn, void *data, struct git_config_source *config_source, const struct config_options *opts) { struct config_include_data inc = CONFIG_INCLUDE_INIT; int ret; if (opts->respect_includes) { inc.fn = fn; inc.data = data; inc.opts = opts; inc.config_source = config_source; fn = git_config_include; data = &inc; } if (config_source) current_parsing_scope = config_source->scope; /* * If we have a specific filename, use it. Otherwise, follow the * regular lookup sequence. */ if (config_source && config_source->use_stdin) { ret = git_config_from_stdin(fn, data); } else if (config_source && config_source->file) { ret = git_config_from_file(fn, config_source->file, data); } else if (config_source && config_source->blob) { struct repository *repo = config_source->repo ? config_source->repo : the_repository; ret = git_config_from_blob_ref(fn, repo, config_source->blob, data); } else { ret = do_git_config_sequence(opts, fn, data); } if (inc.remote_urls) { string_list_clear(inc.remote_urls, 0); FREE_AND_NULL(inc.remote_urls); } return ret; } static void configset_iter(struct config_set *cs, config_fn_t fn, void *data) { int i, value_index; struct string_list *values; struct config_set_element *entry; struct configset_list *list = &cs->list; for (i = 0; i < list->nr; i++) { entry = list->items[i].e; value_index = list->items[i].value_index; values = &entry->value_list; current_config_kvi = values->items[value_index].util; if (fn(entry->key, values->items[value_index].string, data) < 0) git_die_config_linenr(entry->key, current_config_kvi->filename, current_config_kvi->linenr); current_config_kvi = NULL; } } void read_early_config(config_fn_t cb, void *data) { struct config_options opts = {0}; struct strbuf commondir = STRBUF_INIT; struct strbuf gitdir = STRBUF_INIT; opts.respect_includes = 1; if (have_git_dir()) { opts.commondir = get_git_common_dir(); opts.git_dir = get_git_dir(); /* * When setup_git_directory() was not yet asked to discover the * GIT_DIR, we ask discover_git_directory() to figure out whether there * is any repository config we should use (but unlike * setup_git_directory_gently(), no global state is changed, most * notably, the current working directory is still the same after the * call). */ } else if (!discover_git_directory(&commondir, &gitdir)) { opts.commondir = commondir.buf; opts.git_dir = gitdir.buf; } config_with_options(cb, data, NULL, &opts); strbuf_release(&commondir); strbuf_release(&gitdir); } /* * Read config but only enumerate system and global settings. * Omit any repo-local, worktree-local, or command-line settings. */ void read_very_early_config(config_fn_t cb, void *data) { struct config_options opts = { 0 }; opts.respect_includes = 1; opts.ignore_repo = 1; opts.ignore_worktree = 1; opts.ignore_cmdline = 1; opts.system_gently = 1; config_with_options(cb, data, NULL, &opts); } static struct config_set_element *configset_find_element(struct config_set *cs, const char *key) { struct config_set_element k; struct config_set_element *found_entry; char *normalized_key; /* * `key` may come from the user, so normalize it before using it * for querying entries from the hashmap. */ if (git_config_parse_key(key, &normalized_key, NULL)) return NULL; hashmap_entry_init(&k.ent, strhash(normalized_key)); k.key = normalized_key; found_entry = hashmap_get_entry(&cs->config_hash, &k, ent, NULL); free(normalized_key); return found_entry; } static int configset_add_value(struct config_set *cs, const char *key, const char *value) { struct config_set_element *e; struct string_list_item *si; struct configset_list_item *l_item; struct key_value_info *kv_info = xmalloc(sizeof(*kv_info)); e = configset_find_element(cs, key); /* * Since the keys are being fed by git_config*() callback mechanism, they * are already normalized. So simply add them without any further munging. */ if (!e) { e = xmalloc(sizeof(*e)); hashmap_entry_init(&e->ent, strhash(key)); e->key = xstrdup(key); string_list_init_dup(&e->value_list); hashmap_add(&cs->config_hash, &e->ent); } si = string_list_append_nodup(&e->value_list, xstrdup_or_null(value)); ALLOC_GROW(cs->list.items, cs->list.nr + 1, cs->list.alloc); l_item = &cs->list.items[cs->list.nr++]; l_item->e = e; l_item->value_index = e->value_list.nr - 1; if (!cf) BUG("configset_add_value has no source"); if (cf->name) { kv_info->filename = strintern(cf->name); kv_info->linenr = cf->linenr; kv_info->origin_type = cf->origin_type; } else { /* for values read from `git_config_from_parameters()` */ kv_info->filename = NULL; kv_info->linenr = -1; kv_info->origin_type = CONFIG_ORIGIN_CMDLINE; } kv_info->scope = current_parsing_scope; si->util = kv_info; return 0; } static int config_set_element_cmp(const void *unused_cmp_data, const struct hashmap_entry *eptr, const struct hashmap_entry *entry_or_key, const void *unused_keydata) { const struct config_set_element *e1, *e2; e1 = container_of(eptr, const struct config_set_element, ent); e2 = container_of(entry_or_key, const struct config_set_element, ent); return strcmp(e1->key, e2->key); } void git_configset_init(struct config_set *cs) { hashmap_init(&cs->config_hash, config_set_element_cmp, NULL, 0); cs->hash_initialized = 1; cs->list.nr = 0; cs->list.alloc = 0; cs->list.items = NULL; } void git_configset_clear(struct config_set *cs) { struct config_set_element *entry; struct hashmap_iter iter; if (!cs->hash_initialized) return; hashmap_for_each_entry(&cs->config_hash, &iter, entry, ent /* member name */) { free(entry->key); string_list_clear(&entry->value_list, 1); } hashmap_clear_and_free(&cs->config_hash, struct config_set_element, ent); cs->hash_initialized = 0; free(cs->list.items); cs->list.nr = 0; cs->list.alloc = 0; cs->list.items = NULL; } static int config_set_callback(const char *key, const char *value, void *cb) { struct config_set *cs = cb; configset_add_value(cs, key, value); return 0; } int git_configset_add_file(struct config_set *cs, const char *filename) { return git_config_from_file(config_set_callback, filename, cs); } int git_configset_get_value(struct config_set *cs, const char *key, const char **value) { const struct string_list *values = NULL; /* * Follows "last one wins" semantic, i.e., if there are multiple matches for the * queried key in the files of the configset, the value returned will be the last * value in the value list for that key. */ values = git_configset_get_value_multi(cs, key); if (!values) return 1; assert(values->nr > 0); *value = values->items[values->nr - 1].string; return 0; } const struct string_list *git_configset_get_value_multi(struct config_set *cs, const char *key) { struct config_set_element *e = configset_find_element(cs, key); return e ? &e->value_list : NULL; } int git_configset_get_string(struct config_set *cs, const char *key, char **dest) { const char *value; if (!git_configset_get_value(cs, key, &value)) return git_config_string((const char **)dest, key, value); else return 1; } static int git_configset_get_string_tmp(struct config_set *cs, const char *key, const char **dest) { const char *value; if (!git_configset_get_value(cs, key, &value)) { if (!value) return config_error_nonbool(key); *dest = value; return 0; } else { return 1; } } int git_configset_get_int(struct config_set *cs, const char *key, int *dest) { const char *value; if (!git_configset_get_value(cs, key, &value)) { *dest = git_config_int(key, value); return 0; } else return 1; } int git_configset_get_ulong(struct config_set *cs, const char *key, unsigned long *dest) { const char *value; if (!git_configset_get_value(cs, key, &value)) { *dest = git_config_ulong(key, value); return 0; } else return 1; } int git_configset_get_bool(struct config_set *cs, const char *key, int *dest) { const char *value; if (!git_configset_get_value(cs, key, &value)) { *dest = git_config_bool(key, value); return 0; } else return 1; } int git_configset_get_bool_or_int(struct config_set *cs, const char *key, int *is_bool, int *dest) { const char *value; if (!git_configset_get_value(cs, key, &value)) { *dest = git_config_bool_or_int(key, value, is_bool); return 0; } else return 1; } int git_configset_get_maybe_bool(struct config_set *cs, const char *key, int *dest) { const char *value; if (!git_configset_get_value(cs, key, &value)) { *dest = git_parse_maybe_bool(value); if (*dest == -1) return -1; return 0; } else return 1; } int git_configset_get_pathname(struct config_set *cs, const char *key, const char **dest) { const char *value; if (!git_configset_get_value(cs, key, &value)) return git_config_pathname(dest, key, value); else return 1; } /* Functions use to read configuration from a repository */ static void repo_read_config(struct repository *repo) { struct config_options opts = { 0 }; opts.respect_includes = 1; opts.commondir = repo->commondir; opts.git_dir = repo->gitdir; if (!repo->config) CALLOC_ARRAY(repo->config, 1); else git_configset_clear(repo->config); git_configset_init(repo->config); if (config_with_options(config_set_callback, repo->config, NULL, &opts) < 0) /* * config_with_options() normally returns only * zero, as most errors are fatal, and * non-fatal potential errors are guarded by "if" * statements that are entered only when no error is * possible. * * If we ever encounter a non-fatal error, it means * something went really wrong and we should stop * immediately. */ die(_("unknown error occurred while reading the configuration files")); } static void git_config_check_init(struct repository *repo) { if (repo->config && repo->config->hash_initialized) return; repo_read_config(repo); } static void repo_config_clear(struct repository *repo) { if (!repo->config || !repo->config->hash_initialized) return; git_configset_clear(repo->config); } void repo_config(struct repository *repo, config_fn_t fn, void *data) { git_config_check_init(repo); configset_iter(repo->config, fn, data); } int repo_config_get_value(struct repository *repo, const char *key, const char **value) { git_config_check_init(repo); return git_configset_get_value(repo->config, key, value); } const struct string_list *repo_config_get_value_multi(struct repository *repo, const char *key) { git_config_check_init(repo); return git_configset_get_value_multi(repo->config, key); } int repo_config_get_string(struct repository *repo, const char *key, char **dest) { int ret; git_config_check_init(repo); ret = git_configset_get_string(repo->config, key, dest); if (ret < 0) git_die_config(key, NULL); return ret; } int repo_config_get_string_tmp(struct repository *repo, const char *key, const char **dest) { int ret; git_config_check_init(repo); ret = git_configset_get_string_tmp(repo->config, key, dest); if (ret < 0) git_die_config(key, NULL); return ret; } int repo_config_get_int(struct repository *repo, const char *key, int *dest) { git_config_check_init(repo); return git_configset_get_int(repo->config, key, dest); } int repo_config_get_ulong(struct repository *repo, const char *key, unsigned long *dest) { git_config_check_init(repo); return git_configset_get_ulong(repo->config, key, dest); } int repo_config_get_bool(struct repository *repo, const char *key, int *dest) { git_config_check_init(repo); return git_configset_get_bool(repo->config, key, dest); } int repo_config_get_bool_or_int(struct repository *repo, const char *key, int *is_bool, int *dest) { git_config_check_init(repo); return git_configset_get_bool_or_int(repo->config, key, is_bool, dest); } int repo_config_get_maybe_bool(struct repository *repo, const char *key, int *dest) { git_config_check_init(repo); return git_configset_get_maybe_bool(repo->config, key, dest); } int repo_config_get_pathname(struct repository *repo, const char *key, const char **dest) { int ret; git_config_check_init(repo); ret = git_configset_get_pathname(repo->config, key, dest); if (ret < 0) git_die_config(key, NULL); return ret; } /* Functions used historically to read configuration from 'the_repository' */ void git_config(config_fn_t fn, void *data) { repo_config(the_repository, fn, data); } void git_config_clear(void) { repo_config_clear(the_repository); } int git_config_get_value(const char *key, const char **value) { return repo_config_get_value(the_repository, key, value); } const struct string_list *git_config_get_value_multi(const char *key) { return repo_config_get_value_multi(the_repository, key); } int git_config_get_string(const char *key, char **dest) { return repo_config_get_string(the_repository, key, dest); } int git_config_get_string_tmp(const char *key, const char **dest) { return repo_config_get_string_tmp(the_repository, key, dest); } int git_config_get_int(const char *key, int *dest) { return repo_config_get_int(the_repository, key, dest); } int git_config_get_ulong(const char *key, unsigned long *dest) { return repo_config_get_ulong(the_repository, key, dest); } int git_config_get_bool(const char *key, int *dest) { return repo_config_get_bool(the_repository, key, dest); } int git_config_get_bool_or_int(const char *key, int *is_bool, int *dest) { return repo_config_get_bool_or_int(the_repository, key, is_bool, dest); } int git_config_get_maybe_bool(const char *key, int *dest) { return repo_config_get_maybe_bool(the_repository, key, dest); } int git_config_get_pathname(const char *key, const char **dest) { return repo_config_get_pathname(the_repository, key, dest); } int git_config_get_expiry(const char *key, const char **output) { int ret = git_config_get_string(key, (char **)output); if (ret) return ret; if (strcmp(*output, "now")) { timestamp_t now = approxidate("now"); if (approxidate(*output) >= now) git_die_config(key, _("Invalid %s: '%s'"), key, *output); } return ret; } int git_config_get_expiry_in_days(const char *key, timestamp_t *expiry, timestamp_t now) { const char *expiry_string; intmax_t days; timestamp_t when; if (git_config_get_string_tmp(key, &expiry_string)) return 1; /* no such thing */ if (git_parse_signed(expiry_string, &days, maximum_signed_value_of_type(int))) { const int scale = 86400; *expiry = now - days * scale; return 0; } if (!parse_expiry_date(expiry_string, &when)) { *expiry = when; return 0; } return -1; /* thing exists but cannot be parsed */ } int git_config_get_split_index(void) { int val; if (!git_config_get_maybe_bool("core.splitindex", &val)) return val; return -1; /* default value */ } int git_config_get_max_percent_split_change(void) { int val = -1; if (!git_config_get_int("splitindex.maxpercentchange", &val)) { if (0 <= val && val <= 100) return val; return error(_("splitIndex.maxPercentChange value '%d' " "should be between 0 and 100"), val); } return -1; /* default value */ } int git_config_get_fsmonitor(void) { if (git_config_get_pathname("core.fsmonitor", &core_fsmonitor)) core_fsmonitor = getenv("GIT_TEST_FSMONITOR"); if (core_fsmonitor && !*core_fsmonitor) core_fsmonitor = NULL; if (core_fsmonitor) return 1; return 0; } int git_config_get_index_threads(int *dest) { int is_bool, val; val = git_env_ulong("GIT_TEST_INDEX_THREADS", 0); if (val) { *dest = val; return 0; } if (!git_config_get_bool_or_int("index.threads", &is_bool, &val)) { if (is_bool) *dest = val ? 0 : 1; else *dest = val; return 0; } return 1; } NORETURN void git_die_config_linenr(const char *key, const char *filename, int linenr) { if (!filename) die(_("unable to parse '%s' from command-line config"), key); else die(_("bad config variable '%s' in file '%s' at line %d"), key, filename, linenr); } NORETURN __attribute__((format(printf, 2, 3))) void git_die_config(const char *key, const char *err, ...) { const struct string_list *values; struct key_value_info *kv_info; report_fn error_fn = get_error_routine(); if (err) { va_list params; va_start(params, err); error_fn(err, params); va_end(params); } values = git_config_get_value_multi(key); kv_info = values->items[values->nr - 1].util; git_die_config_linenr(key, kv_info->filename, kv_info->linenr); } /* * Find all the stuff for git_config_set() below. */ struct config_store_data { size_t baselen; char *key; int do_not_match; const char *fixed_value; regex_t *value_pattern; int multi_replace; struct { size_t begin, end; enum config_event_t type; int is_keys_section; } *parsed; unsigned int parsed_nr, parsed_alloc, *seen, seen_nr, seen_alloc; unsigned int key_seen:1, section_seen:1, is_keys_section:1; }; static void config_store_data_clear(struct config_store_data *store) { free(store->key); if (store->value_pattern != NULL && store->value_pattern != CONFIG_REGEX_NONE) { regfree(store->value_pattern); free(store->value_pattern); } free(store->parsed); free(store->seen); memset(store, 0, sizeof(*store)); } static int matches(const char *key, const char *value, const struct config_store_data *store) { if (strcmp(key, store->key)) return 0; /* not ours */ if (store->fixed_value) return !strcmp(store->fixed_value, value); if (!store->value_pattern) return 1; /* always matches */ if (store->value_pattern == CONFIG_REGEX_NONE) return 0; /* never matches */ return store->do_not_match ^ (value && !regexec(store->value_pattern, value, 0, NULL, 0)); } static int store_aux_event(enum config_event_t type, size_t begin, size_t end, void *data) { struct config_store_data *store = data; ALLOC_GROW(store->parsed, store->parsed_nr + 1, store->parsed_alloc); store->parsed[store->parsed_nr].begin = begin; store->parsed[store->parsed_nr].end = end; store->parsed[store->parsed_nr].type = type; if (type == CONFIG_EVENT_SECTION) { int (*cmpfn)(const char *, const char *, size_t); if (cf->var.len < 2 || cf->var.buf[cf->var.len - 1] != '.') return error(_("invalid section name '%s'"), cf->var.buf); if (cf->subsection_case_sensitive) cmpfn = strncasecmp; else cmpfn = strncmp; /* Is this the section we were looking for? */ store->is_keys_section = store->parsed[store->parsed_nr].is_keys_section = cf->var.len - 1 == store->baselen && !cmpfn(cf->var.buf, store->key, store->baselen); if (store->is_keys_section) { store->section_seen = 1; ALLOC_GROW(store->seen, store->seen_nr + 1, store->seen_alloc); store->seen[store->seen_nr] = store->parsed_nr; } } store->parsed_nr++; return 0; } static int store_aux(const char *key, const char *value, void *cb) { struct config_store_data *store = cb; if (store->key_seen) { if (matches(key, value, store)) { if (store->seen_nr == 1 && store->multi_replace == 0) { warning(_("%s has multiple values"), key); } ALLOC_GROW(store->seen, store->seen_nr + 1, store->seen_alloc); store->seen[store->seen_nr] = store->parsed_nr; store->seen_nr++; } } else if (store->is_keys_section) { /* * Do not increment matches yet: this may not be a match, but we * are in the desired section. */ ALLOC_GROW(store->seen, store->seen_nr + 1, store->seen_alloc); store->seen[store->seen_nr] = store->parsed_nr; store->section_seen = 1; if (matches(key, value, store)) { store->seen_nr++; store->key_seen = 1; } } return 0; } static int write_error(const char *filename) { error(_("failed to write new configuration file %s"), filename); /* Same error code as "failed to rename". */ return 4; } static struct strbuf store_create_section(const char *key, const struct config_store_data *store) { const char *dot; size_t i; struct strbuf sb = STRBUF_INIT; dot = memchr(key, '.', store->baselen); if (dot) { strbuf_addf(&sb, "[%.*s \"", (int)(dot - key), key); for (i = dot - key + 1; i < store->baselen; i++) { if (key[i] == '"' || key[i] == '\\') strbuf_addch(&sb, '\\'); strbuf_addch(&sb, key[i]); } strbuf_addstr(&sb, "\"]\n"); } else { strbuf_addch(&sb, '['); strbuf_add(&sb, key, store->baselen); strbuf_addstr(&sb, "]\n"); } return sb; } static ssize_t write_section(int fd, const char *key, const struct config_store_data *store) { struct strbuf sb = store_create_section(key, store); ssize_t ret; ret = write_in_full(fd, sb.buf, sb.len); strbuf_release(&sb); return ret; } static ssize_t write_pair(int fd, const char *key, const char *value, const struct config_store_data *store) { int i; ssize_t ret; const char *quote = ""; struct strbuf sb = STRBUF_INIT; /* * Check to see if the value needs to be surrounded with a dq pair. * Note that problematic characters are always backslash-quoted; this * check is about not losing leading or trailing SP and strings that * follow beginning-of-comment characters (i.e. ';' and '#') by the * configuration parser. */ if (value[0] == ' ') quote = "\""; for (i = 0; value[i]; i++) if (value[i] == ';' || value[i] == '#') quote = "\""; if (i && value[i - 1] == ' ') quote = "\""; strbuf_addf(&sb, "\t%s = %s", key + store->baselen + 1, quote); for (i = 0; value[i]; i++) switch (value[i]) { case '\n': strbuf_addstr(&sb, "\\n"); break; case '\t': strbuf_addstr(&sb, "\\t"); break; case '"': case '\\': strbuf_addch(&sb, '\\'); /* fallthrough */ default: strbuf_addch(&sb, value[i]); break; } strbuf_addf(&sb, "%s\n", quote); ret = write_in_full(fd, sb.buf, sb.len); strbuf_release(&sb); return ret; } /* * If we are about to unset the last key(s) in a section, and if there are * no comments surrounding (or included in) the section, we will want to * extend begin/end to remove the entire section. * * Note: the parameter `seen_ptr` points to the index into the store.seen * array. * This index may be incremented if a section has more than one * entry (which all are to be removed). */ static void maybe_remove_section(struct config_store_data *store, size_t *begin_offset, size_t *end_offset, int *seen_ptr) { size_t begin; int i, seen, section_seen = 0; /* * First, ensure that this is the first key, and that there are no * comments before the entry nor before the section header. */ seen = *seen_ptr; for (i = store->seen[seen]; i > 0; i--) { enum config_event_t type = store->parsed[i - 1].type; if (type == CONFIG_EVENT_COMMENT) /* There is a comment before this entry or section */ return; if (type == CONFIG_EVENT_ENTRY) { if (!section_seen) /* This is not the section's first entry. */ return; /* We encountered no comment before the section. */ break; } if (type == CONFIG_EVENT_SECTION) { if (!store->parsed[i - 1].is_keys_section) break; section_seen = 1; } } begin = store->parsed[i].begin; /* * Next, make sure that we are removing the last key(s) in the section, * and that there are no comments that are possibly about the current * section. */ for (i = store->seen[seen] + 1; i < store->parsed_nr; i++) { enum config_event_t type = store->parsed[i].type; if (type == CONFIG_EVENT_COMMENT) return; if (type == CONFIG_EVENT_SECTION) { if (store->parsed[i].is_keys_section) continue; break; } if (type == CONFIG_EVENT_ENTRY) { if (++seen < store->seen_nr && i == store->seen[seen]) /* We want to remove this entry, too */ continue; /* There is another entry in this section. */ return; } } /* * We are really removing the last entry/entries from this section, and * there are no enclosed or surrounding comments. Remove the entire, * now-empty section. */ *seen_ptr = seen; *begin_offset = begin; if (i < store->parsed_nr) *end_offset = store->parsed[i].begin; else *end_offset = store->parsed[store->parsed_nr - 1].end; } int git_config_set_in_file_gently(const char *config_filename, const char *key, const char *value) { return git_config_set_multivar_in_file_gently(config_filename, key, value, NULL, 0); } void git_config_set_in_file(const char *config_filename, const char *key, const char *value) { git_config_set_multivar_in_file(config_filename, key, value, NULL, 0); } int git_config_set_gently(const char *key, const char *value) { return git_config_set_multivar_gently(key, value, NULL, 0); } int repo_config_set_worktree_gently(struct repository *r, const char *key, const char *value) { /* Only use worktree-specific config if it is is already enabled. */ if (repository_format_worktree_config) { char *file = repo_git_path(r, "config.worktree"); int ret = git_config_set_multivar_in_file_gently( file, key, value, NULL, 0); free(file); return ret; } return repo_config_set_multivar_gently(r, key, value, NULL, 0); } void git_config_set(const char *key, const char *value) { git_config_set_multivar(key, value, NULL, 0); trace2_cmd_set_config(key, value); } /* * If value==NULL, unset in (remove from) config, * if value_pattern!=NULL, disregard key/value pairs where value does not match. * if value_pattern==CONFIG_REGEX_NONE, do not match any existing values * (only add a new one) * if flags contains the CONFIG_FLAGS_MULTI_REPLACE flag, all matching * key/values are removed before a single new pair is written. If the * flag is not present, then replace only the first match. * * Returns 0 on success. * * This function does this: * * - it locks the config file by creating ".git/config.lock" * * - it then parses the config using store_aux() as validator to find * the position on the key/value pair to replace. If it is to be unset, * it must be found exactly once. * * - the config file is mmap()ed and the part before the match (if any) is * written to the lock file, then the changed part and the rest. * * - the config file is removed and the lock file rename()d to it. * */ int git_config_set_multivar_in_file_gently(const char *config_filename, const char *key, const char *value, const char *value_pattern, unsigned flags) { int fd = -1, in_fd = -1; int ret; struct lock_file lock = LOCK_INIT; char *filename_buf = NULL; char *contents = NULL; size_t contents_sz; struct config_store_data store; memset(&store, 0, sizeof(store)); /* parse-key returns negative; flip the sign to feed exit(3) */ ret = 0 - git_config_parse_key(key, &store.key, &store.baselen); if (ret) goto out_free; store.multi_replace = (flags & CONFIG_FLAGS_MULTI_REPLACE) != 0; if (!config_filename) config_filename = filename_buf = git_pathdup("config"); /* * The lock serves a purpose in addition to locking: the new * contents of .git/config will be written into it. */ fd = hold_lock_file_for_update(&lock, config_filename, 0); if (fd < 0) { error_errno(_("could not lock config file %s"), config_filename); ret = CONFIG_NO_LOCK; goto out_free; } /* * If .git/config does not exist yet, write a minimal version. */ in_fd = open(config_filename, O_RDONLY); if ( in_fd < 0 ) { if ( ENOENT != errno ) { error_errno(_("opening %s"), config_filename); ret = CONFIG_INVALID_FILE; /* same as "invalid config file" */ goto out_free; } /* if nothing to unset, error out */ if (value == NULL) { ret = CONFIG_NOTHING_SET; goto out_free; } free(store.key); store.key = xstrdup(key); if (write_section(fd, key, &store) < 0 || write_pair(fd, key, value, &store) < 0) goto write_err_out; } else { struct stat st; size_t copy_begin, copy_end; int i, new_line = 0; struct config_options opts; if (value_pattern == NULL) store.value_pattern = NULL; else if (value_pattern == CONFIG_REGEX_NONE) store.value_pattern = CONFIG_REGEX_NONE; else if (flags & CONFIG_FLAGS_FIXED_VALUE) store.fixed_value = value_pattern; else { if (value_pattern[0] == '!') { store.do_not_match = 1; value_pattern++; } else store.do_not_match = 0; store.value_pattern = (regex_t*)xmalloc(sizeof(regex_t)); if (regcomp(store.value_pattern, value_pattern, REG_EXTENDED)) { error(_("invalid pattern: %s"), value_pattern); FREE_AND_NULL(store.value_pattern); ret = CONFIG_INVALID_PATTERN; goto out_free; } } ALLOC_GROW(store.parsed, 1, store.parsed_alloc); store.parsed[0].end = 0; memset(&opts, 0, sizeof(opts)); opts.event_fn = store_aux_event; opts.event_fn_data = &store; /* * After this, store.parsed will contain offsets of all the * parsed elements, and store.seen will contain a list of * matches, as indices into store.parsed. * * As a side effect, we make sure to transform only a valid * existing config file. */ if (git_config_from_file_with_options(store_aux, config_filename, &store, &opts)) { error(_("invalid config file %s"), config_filename); ret = CONFIG_INVALID_FILE; goto out_free; } /* if nothing to unset, or too many matches, error out */ if ((store.seen_nr == 0 && value == NULL) || (store.seen_nr > 1 && !store.multi_replace)) { ret = CONFIG_NOTHING_SET; goto out_free; } if (fstat(in_fd, &st) == -1) { error_errno(_("fstat on %s failed"), config_filename); ret = CONFIG_INVALID_FILE; goto out_free; } contents_sz = xsize_t(st.st_size); contents = xmmap_gently(NULL, contents_sz, PROT_READ, MAP_PRIVATE, in_fd, 0); if (contents == MAP_FAILED) { if (errno == ENODEV && S_ISDIR(st.st_mode)) errno = EISDIR; error_errno(_("unable to mmap '%s'%s"), config_filename, mmap_os_err()); ret = CONFIG_INVALID_FILE; contents = NULL; goto out_free; } close(in_fd); in_fd = -1; if (chmod(get_lock_file_path(&lock), st.st_mode & 07777) < 0) { error_errno(_("chmod on %s failed"), get_lock_file_path(&lock)); ret = CONFIG_NO_WRITE; goto out_free; } if (store.seen_nr == 0) { if (!store.seen_alloc) { /* Did not see key nor section */ ALLOC_GROW(store.seen, 1, store.seen_alloc); store.seen[0] = store.parsed_nr - !!store.parsed_nr; } store.seen_nr = 1; } for (i = 0, copy_begin = 0; i < store.seen_nr; i++) { size_t replace_end; int j = store.seen[i]; new_line = 0; if (!store.key_seen) { copy_end = store.parsed[j].end; /* include '\n' when copying section header */ if (copy_end > 0 && copy_end < contents_sz && contents[copy_end - 1] != '\n' && contents[copy_end] == '\n') copy_end++; replace_end = copy_end; } else { replace_end = store.parsed[j].end; copy_end = store.parsed[j].begin; if (!value) maybe_remove_section(&store, ©_end, &replace_end, &i); /* * Swallow preceding white-space on the same * line. */ while (copy_end > 0 ) { char c = contents[copy_end - 1]; if (isspace(c) && c != '\n') copy_end--; else break; } } if (copy_end > 0 && contents[copy_end-1] != '\n') new_line = 1; /* write the first part of the config */ if (copy_end > copy_begin) { if (write_in_full(fd, contents + copy_begin, copy_end - copy_begin) < 0) goto write_err_out; if (new_line && write_str_in_full(fd, "\n") < 0) goto write_err_out; } copy_begin = replace_end; } /* write the pair (value == NULL means unset) */ if (value != NULL) { if (!store.section_seen) { if (write_section(fd, key, &store) < 0) goto write_err_out; } if (write_pair(fd, key, value, &store) < 0) goto write_err_out; } /* write the rest of the config */ if (copy_begin < contents_sz) if (write_in_full(fd, contents + copy_begin, contents_sz - copy_begin) < 0) goto write_err_out; munmap(contents, contents_sz); contents = NULL; } if (commit_lock_file(&lock) < 0) { error_errno(_("could not write config file %s"), config_filename); ret = CONFIG_NO_WRITE; goto out_free; } ret = 0; /* Invalidate the config cache */ git_config_clear(); out_free: rollback_lock_file(&lock); free(filename_buf); if (contents) munmap(contents, contents_sz); if (in_fd >= 0) close(in_fd); config_store_data_clear(&store); return ret; write_err_out: ret = write_error(get_lock_file_path(&lock)); goto out_free; } void git_config_set_multivar_in_file(const char *config_filename, const char *key, const char *value, const char *value_pattern, unsigned flags) { if (!git_config_set_multivar_in_file_gently(config_filename, key, value, value_pattern, flags)) return; if (value) die(_("could not set '%s' to '%s'"), key, value); else die(_("could not unset '%s'"), key); } int git_config_set_multivar_gently(const char *key, const char *value, const char *value_pattern, unsigned flags) { return repo_config_set_multivar_gently(the_repository, key, value, value_pattern, flags); } int repo_config_set_multivar_gently(struct repository *r, const char *key, const char *value, const char *value_pattern, unsigned flags) { char *file = repo_git_path(r, "config"); int res = git_config_set_multivar_in_file_gently(file, key, value, value_pattern, flags); free(file); return res; } void git_config_set_multivar(const char *key, const char *value, const char *value_pattern, unsigned flags) { git_config_set_multivar_in_file(git_path("config"), key, value, value_pattern, flags); } static int section_name_match (const char *buf, const char *name) { int i = 0, j = 0, dot = 0; if (buf[i] != '[') return 0; for (i = 1; buf[i] && buf[i] != ']'; i++) { if (!dot && isspace(buf[i])) { dot = 1; if (name[j++] != '.') break; for (i++; isspace(buf[i]); i++) ; /* do nothing */ if (buf[i] != '"') break; continue; } if (buf[i] == '\\' && dot) i++; else if (buf[i] == '"' && dot) { for (i++; isspace(buf[i]); i++) ; /* do_nothing */ break; } if (buf[i] != name[j++]) break; } if (buf[i] == ']' && name[j] == 0) { /* * We match, now just find the right length offset by * gobbling up any whitespace after it, as well */ i++; for (; buf[i] && isspace(buf[i]); i++) ; /* do nothing */ return i; } return 0; } static int section_name_is_ok(const char *name) { /* Empty section names are bogus. */ if (!*name) return 0; /* * Before a dot, we must be alphanumeric or dash. After the first dot, * anything goes, so we can stop checking. */ for (; *name && *name != '.'; name++) if (*name != '-' && !isalnum(*name)) return 0; return 1; } /* if new_name == NULL, the section is removed instead */ static int git_config_copy_or_rename_section_in_file(const char *config_filename, const char *old_name, const char *new_name, int copy) { int ret = 0, remove = 0; char *filename_buf = NULL; struct lock_file lock = LOCK_INIT; int out_fd; char buf[1024]; FILE *config_file = NULL; struct stat st; struct strbuf copystr = STRBUF_INIT; struct config_store_data store; memset(&store, 0, sizeof(store)); if (new_name && !section_name_is_ok(new_name)) { ret = error(_("invalid section name: %s"), new_name); goto out_no_rollback; } if (!config_filename) config_filename = filename_buf = git_pathdup("config"); out_fd = hold_lock_file_for_update(&lock, config_filename, 0); if (out_fd < 0) { ret = error(_("could not lock config file %s"), config_filename); goto out; } if (!(config_file = fopen(config_filename, "rb"))) { ret = warn_on_fopen_errors(config_filename); if (ret) goto out; /* no config file means nothing to rename, no error */ goto commit_and_out; } if (fstat(fileno(config_file), &st) == -1) { ret = error_errno(_("fstat on %s failed"), config_filename); goto out; } if (chmod(get_lock_file_path(&lock), st.st_mode & 07777) < 0) { ret = error_errno(_("chmod on %s failed"), get_lock_file_path(&lock)); goto out; } while (fgets(buf, sizeof(buf), config_file)) { unsigned i; int length; int is_section = 0; char *output = buf; for (i = 0; buf[i] && isspace(buf[i]); i++) ; /* do nothing */ if (buf[i] == '[') { /* it's a section */ int offset; is_section = 1; /* * When encountering a new section under -c we * need to flush out any section we're already * coping and begin anew. There might be * multiple [branch "$name"] sections. */ if (copystr.len > 0) { if (write_in_full(out_fd, copystr.buf, copystr.len) < 0) { ret = write_error(get_lock_file_path(&lock)); goto out; } strbuf_reset(©str); } offset = section_name_match(&buf[i], old_name); if (offset > 0) { ret++; if (new_name == NULL) { remove = 1; continue; } store.baselen = strlen(new_name); if (!copy) { if (write_section(out_fd, new_name, &store) < 0) { ret = write_error(get_lock_file_path(&lock)); goto out; } /* * We wrote out the new section, with * a newline, now skip the old * section's length */ output += offset + i; if (strlen(output) > 0) { /* * More content means there's * a declaration to put on the * next line; indent with a * tab */ output -= 1; output[0] = '\t'; } } else { copystr = store_create_section(new_name, &store); } } remove = 0; } if (remove) continue; length = strlen(output); if (!is_section && copystr.len > 0) { strbuf_add(©str, output, length); } if (write_in_full(out_fd, output, length) < 0) { ret = write_error(get_lock_file_path(&lock)); goto out; } } /* * Copy a trailing section at the end of the config, won't be * flushed by the usual "flush because we have a new section * logic in the loop above. */ if (copystr.len > 0) { if (write_in_full(out_fd, copystr.buf, copystr.len) < 0) { ret = write_error(get_lock_file_path(&lock)); goto out; } strbuf_reset(©str); } fclose(config_file); config_file = NULL; commit_and_out: if (commit_lock_file(&lock) < 0) ret = error_errno(_("could not write config file %s"), config_filename); out: if (config_file) fclose(config_file); rollback_lock_file(&lock); out_no_rollback: free(filename_buf); config_store_data_clear(&store); return ret; } int git_config_rename_section_in_file(const char *config_filename, const char *old_name, const char *new_name) { return git_config_copy_or_rename_section_in_file(config_filename, old_name, new_name, 0); } int git_config_rename_section(const char *old_name, const char *new_name) { return git_config_rename_section_in_file(NULL, old_name, new_name); } int git_config_copy_section_in_file(const char *config_filename, const char *old_name, const char *new_name) { return git_config_copy_or_rename_section_in_file(config_filename, old_name, new_name, 1); } int git_config_copy_section(const char *old_name, const char *new_name) { return git_config_copy_section_in_file(NULL, old_name, new_name); } /* * Call this to report error for your variable that should not * get a boolean value (i.e. "[my] var" means "true"). */ #undef config_error_nonbool int config_error_nonbool(const char *var) { return error(_("missing value for '%s'"), var); } int parse_config_key(const char *var, const char *section, const char **subsection, size_t *subsection_len, const char **key) { const char *dot; /* Does it start with "section." ? */ if (!skip_prefix(var, section, &var) || *var != '.') return -1; /* * Find the key; we don't know yet if we have a subsection, but we must * parse backwards from the end, since the subsection may have dots in * it, too. */ dot = strrchr(var, '.'); *key = dot + 1; /* Did we have a subsection at all? */ if (dot == var) { if (subsection) { *subsection = NULL; *subsection_len = 0; } } else { if (!subsection) return -1; *subsection = var + 1; *subsection_len = dot - *subsection; } return 0; } const char *current_config_origin_type(void) { int type; if (current_config_kvi) type = current_config_kvi->origin_type; else if(cf) type = cf->origin_type; else BUG("current_config_origin_type called outside config callback"); switch (type) { case CONFIG_ORIGIN_BLOB: return "blob"; case CONFIG_ORIGIN_FILE: return "file"; case CONFIG_ORIGIN_STDIN: return "standard input"; case CONFIG_ORIGIN_SUBMODULE_BLOB: return "submodule-blob"; case CONFIG_ORIGIN_CMDLINE: return "command line"; default: BUG("unknown config origin type"); } } const char *config_scope_name(enum config_scope scope) { switch (scope) { case CONFIG_SCOPE_SYSTEM: return "system"; case CONFIG_SCOPE_GLOBAL: return "global"; case CONFIG_SCOPE_LOCAL: return "local"; case CONFIG_SCOPE_WORKTREE: return "worktree"; case CONFIG_SCOPE_COMMAND: return "command"; case CONFIG_SCOPE_SUBMODULE: return "submodule"; default: return "unknown"; } } const char *current_config_name(void) { const char *name; if (current_config_kvi) name = current_config_kvi->filename; else if (cf) name = cf->name; else BUG("current_config_name called outside config callback"); return name ? name : ""; } enum config_scope current_config_scope(void) { if (current_config_kvi) return current_config_kvi->scope; else return current_parsing_scope; } int current_config_line(void) { if (current_config_kvi) return current_config_kvi->linenr; else return cf->linenr; } int lookup_config(const char **mapping, int nr_mapping, const char *var) { int i; for (i = 0; i < nr_mapping; i++) { const char *name = mapping[i]; if (name && !strcasecmp(var, name)) return i; } return -1; }