/cgit-0.9.0.2/git/config.c
C | 1484 lines | 1199 code | 161 blank | 124 comment | 380 complexity | dc28e9883ff1f6df06d4c4a3929d14a9 MD5 | raw file
Possible License(s): GPL-2.0, BSD-2-Clause
- /*
- * GIT - The information manager from hell
- *
- * Copyright (C) Linus Torvalds, 2005
- * Copyright (C) Johannes Schindelin, 2005
- *
- */
- #include "cache.h"
- #include "exec_cmd.h"
- #include "strbuf.h"
- #include "quote.h"
- #define MAXNAME (256)
- static FILE *config_file;
- static const char *config_file_name;
- static int config_linenr;
- static int config_file_eof;
- static int zlib_compression_seen;
- const char *config_exclusive_filename = NULL;
- struct config_item
- {
- struct config_item *next;
- char *name;
- char *value;
- };
- static struct config_item *config_parameters;
- static struct config_item **config_parameters_tail = &config_parameters;
- static void lowercase(char *p)
- {
- for (; *p; p++)
- *p = tolower(*p);
- }
- void git_config_push_parameter(const char *text)
- {
- struct strbuf env = STRBUF_INIT;
- const char *old = getenv(CONFIG_DATA_ENVIRONMENT);
- if (old) {
- strbuf_addstr(&env, old);
- strbuf_addch(&env, ' ');
- }
- sq_quote_buf(&env, text);
- setenv(CONFIG_DATA_ENVIRONMENT, env.buf, 1);
- strbuf_release(&env);
- }
- int git_config_parse_parameter(const char *text)
- {
- struct config_item *ct;
- struct strbuf tmp = STRBUF_INIT;
- struct strbuf **pair;
- strbuf_addstr(&tmp, text);
- pair = strbuf_split(&tmp, '=');
- if (pair[0]->len && pair[0]->buf[pair[0]->len - 1] == '=')
- strbuf_setlen(pair[0], pair[0]->len - 1);
- strbuf_trim(pair[0]);
- if (!pair[0]->len) {
- strbuf_list_free(pair);
- return -1;
- }
- ct = xcalloc(1, sizeof(struct config_item));
- ct->name = strbuf_detach(pair[0], NULL);
- if (pair[1]) {
- strbuf_trim(pair[1]);
- ct->value = strbuf_detach(pair[1], NULL);
- }
- strbuf_list_free(pair);
- lowercase(ct->name);
- *config_parameters_tail = ct;
- config_parameters_tail = &ct->next;
- return 0;
- }
- int git_config_parse_environment(void) {
- const char *env = getenv(CONFIG_DATA_ENVIRONMENT);
- char *envw;
- const char **argv = NULL;
- int nr = 0, alloc = 0;
- int i;
- if (!env)
- return 0;
- /* sq_dequote will write over it */
- envw = xstrdup(env);
- if (sq_dequote_to_argv(envw, &argv, &nr, &alloc) < 0) {
- free(envw);
- return error("bogus format in " CONFIG_DATA_ENVIRONMENT);
- }
- for (i = 0; i < nr; i++) {
- if (git_config_parse_parameter(argv[i]) < 0) {
- error("bogus config parameter: %s", argv[i]);
- free(argv);
- free(envw);
- return -1;
- }
- }
- free(argv);
- free(envw);
- return 0;
- }
- static int get_next_char(void)
- {
- int c;
- FILE *f;
- c = '\n';
- if ((f = config_file) != NULL) {
- c = fgetc(f);
- if (c == '\r') {
- /* DOS like systems */
- c = fgetc(f);
- if (c != '\n') {
- ungetc(c, f);
- c = '\r';
- }
- }
- if (c == '\n')
- config_linenr++;
- if (c == EOF) {
- config_file_eof = 1;
- c = '\n';
- }
- }
- return c;
- }
- static char *parse_value(void)
- {
- static char value[1024];
- int quote = 0, comment = 0, len = 0, space = 0;
- for (;;) {
- int c = get_next_char();
- if (len >= sizeof(value) - 1)
- return NULL;
- if (c == '\n') {
- if (quote)
- return NULL;
- value[len] = 0;
- return value;
- }
- if (comment)
- continue;
- if (isspace(c) && !quote) {
- if (len)
- space++;
- continue;
- }
- if (!quote) {
- if (c == ';' || c == '#') {
- comment = 1;
- continue;
- }
- }
- for (; space; space--)
- value[len++] = ' ';
- 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;
- }
- value[len++] = c;
- continue;
- }
- if (c == '"') {
- quote = 1-quote;
- continue;
- }
- value[len++] = c;
- }
- }
- static inline int iskeychar(int c)
- {
- return isalnum(c) || c == '-';
- }
- static int get_value(config_fn_t fn, void *data, char *name, unsigned int len)
- {
- int c;
- char *value;
- /* Get the full name */
- for (;;) {
- c = get_next_char();
- if (config_file_eof)
- break;
- if (!iskeychar(c))
- break;
- name[len++] = tolower(c);
- if (len >= MAXNAME)
- return -1;
- }
- name[len] = 0;
- while (c == ' ' || c == '\t')
- c = get_next_char();
- value = NULL;
- if (c != '\n') {
- if (c != '=')
- return -1;
- value = parse_value();
- if (!value)
- return -1;
- }
- return fn(name, value, data);
- }
- static int get_extended_base_var(char *name, int baselen, int c)
- {
- do {
- if (c == '\n')
- return -1;
- c = get_next_char();
- } while (isspace(c));
- /* We require the format to be '[base "extension"]' */
- if (c != '"')
- return -1;
- name[baselen++] = '.';
- for (;;) {
- int c = get_next_char();
- if (c == '\n')
- return -1;
- if (c == '"')
- break;
- if (c == '\\') {
- c = get_next_char();
- if (c == '\n')
- return -1;
- }
- name[baselen++] = c;
- if (baselen > MAXNAME / 2)
- return -1;
- }
- /* Final ']' */
- if (get_next_char() != ']')
- return -1;
- return baselen;
- }
- static int get_base_var(char *name)
- {
- int baselen = 0;
- for (;;) {
- int c = get_next_char();
- if (config_file_eof)
- return -1;
- if (c == ']')
- return baselen;
- if (isspace(c))
- return get_extended_base_var(name, baselen, c);
- if (!iskeychar(c) && c != '.')
- return -1;
- if (baselen > MAXNAME / 2)
- return -1;
- name[baselen++] = tolower(c);
- }
- }
- static int git_parse_file(config_fn_t fn, void *data)
- {
- int comment = 0;
- int baselen = 0;
- static char var[MAXNAME];
- /* U+FEFF Byte Order Mark in UTF8 */
- static const unsigned char *utf8_bom = (unsigned char *) "\xef\xbb\xbf";
- const unsigned char *bomptr = utf8_bom;
- for (;;) {
- int 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 ((unsigned char) c == *bomptr) {
- 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 (config_file_eof)
- return 0;
- comment = 0;
- continue;
- }
- if (comment || isspace(c))
- continue;
- if (c == '#' || c == ';') {
- comment = 1;
- continue;
- }
- if (c == '[') {
- baselen = get_base_var(var);
- if (baselen <= 0)
- break;
- var[baselen++] = '.';
- var[baselen] = 0;
- continue;
- }
- if (!isalpha(c))
- break;
- var[baselen] = tolower(c);
- if (get_value(fn, data, var, baselen+1) < 0)
- break;
- }
- die("bad config file line %d in %s", config_linenr, config_file_name);
- }
- static int parse_unit_factor(const char *end, unsigned long *val)
- {
- if (!*end)
- return 1;
- else if (!strcasecmp(end, "k")) {
- *val *= 1024;
- return 1;
- }
- else if (!strcasecmp(end, "m")) {
- *val *= 1024 * 1024;
- return 1;
- }
- else if (!strcasecmp(end, "g")) {
- *val *= 1024 * 1024 * 1024;
- return 1;
- }
- return 0;
- }
- static int git_parse_long(const char *value, long *ret)
- {
- if (value && *value) {
- char *end;
- long val = strtol(value, &end, 0);
- unsigned long factor = 1;
- if (!parse_unit_factor(end, &factor))
- return 0;
- *ret = val * factor;
- return 1;
- }
- return 0;
- }
- int git_parse_ulong(const char *value, unsigned long *ret)
- {
- if (value && *value) {
- char *end;
- unsigned long val = strtoul(value, &end, 0);
- if (!parse_unit_factor(end, &val))
- return 0;
- *ret = val;
- return 1;
- }
- return 0;
- }
- static void die_bad_config(const char *name)
- {
- if (config_file_name)
- die("bad config value for '%s' in %s", name, config_file_name);
- die("bad config value for '%s'", name);
- }
- int git_config_int(const char *name, const char *value)
- {
- long ret = 0;
- if (!git_parse_long(value, &ret))
- die_bad_config(name);
- return ret;
- }
- unsigned long git_config_ulong(const char *name, const char *value)
- {
- unsigned long ret;
- if (!git_parse_ulong(value, &ret))
- die_bad_config(name);
- return ret;
- }
- static int git_config_maybe_bool_text(const char *name, 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;
- }
- int git_config_maybe_bool(const char *name, const char *value)
- {
- long v = git_config_maybe_bool_text(name, value);
- if (0 <= v)
- return v;
- if (git_parse_long(value, &v))
- return !!v;
- return -1;
- }
- int git_config_bool_or_int(const char *name, const char *value, int *is_bool)
- {
- int v = git_config_maybe_bool_text(name, 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 discard;
- return !!git_config_bool_or_int(name, value, &discard);
- }
- 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 = expand_user_path(value);
- if (!*dest)
- die("Failed to expand user dir in: '%s'", value);
- return 0;
- }
- static int git_default_core_config(const char *var, const char *value)
- {
- /* 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.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.abbrevguard")) {
- unique_abbrev_extra_length = git_config_int(var, value);
- if (unique_abbrev_extra_length < 0)
- unique_abbrev_extra_length = 0;
- return 0;
- }
- 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")) {
- log_all_ref_updates = git_config_bool(var, value);
- return 0;
- }
- if (!strcmp(var, "core.warnambiguousrefs")) {
- warn_ambiguous_refs = git_config_bool(var, value);
- return 0;
- }
- 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);
- core_compression_level = level;
- core_compression_seen = 1;
- if (!zlib_compression_seen)
- zlib_compression_level = level;
- return 0;
- }
- if (!strcmp(var, "core.packedgitwindowsize")) {
- int pgsz_x2 = getpagesize() * 2;
- packed_git_window_size = git_config_int(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.packedgitlimit")) {
- packed_git_limit = git_config_int(var, value);
- return 0;
- }
- if (!strcmp(var, "core.deltabasecachelimit")) {
- delta_base_cache_limit = git_config_int(var, value);
- return 0;
- }
- if (!strcmp(var, "core.autocrlf")) {
- if (value && !strcasecmp(value, "input")) {
- if (eol == EOL_CRLF)
- return error("core.autocrlf=input conflicts with core.eol=crlf");
- auto_crlf = AUTO_CRLF_INPUT;
- return 0;
- }
- auto_crlf = git_config_bool(var, value);
- return 0;
- }
- if (!strcmp(var, "core.safecrlf")) {
- if (value && !strcasecmp(value, "warn")) {
- safe_crlf = SAFE_CRLF_WARN;
- return 0;
- }
- safe_crlf = git_config_bool(var, value);
- return 0;
- }
- if (!strcmp(var, "core.eol")) {
- if (value && !strcasecmp(value, "lf"))
- eol = EOL_LF;
- else if (value && !strcasecmp(value, "crlf"))
- eol = EOL_CRLF;
- else if (value && !strcasecmp(value, "native"))
- eol = EOL_NATIVE;
- else
- eol = EOL_UNSET;
- if (eol == EOL_CRLF && auto_crlf == AUTO_CRLF_INPUT)
- return error("core.autocrlf=input conflicts with core.eol=crlf");
- return 0;
- }
- if (!strcmp(var, "core.notesref")) {
- notes_ref_name = xstrdup(value);
- return 0;
- }
- if (!strcmp(var, "core.pager"))
- return git_config_string(&pager_program, var, value);
- if (!strcmp(var, "core.editor"))
- return git_config_string(&editor_program, var, value);
- 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.fsyncobjectfiles")) {
- 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;
- }
- /* Add other config variables here and to Documentation/config.txt. */
- return 0;
- }
- static int git_default_user_config(const char *var, const char *value)
- {
- if (!strcmp(var, "user.name")) {
- if (!value)
- return config_error_nonbool(var);
- strlcpy(git_default_name, value, sizeof(git_default_name));
- user_ident_explicitly_given |= IDENT_NAME_GIVEN;
- return 0;
- }
- if (!strcmp(var, "user.email")) {
- if (!value)
- return config_error_nonbool(var);
- strlcpy(git_default_email, value, sizeof(git_default_email));
- user_ident_explicitly_given |= IDENT_MAIL_GIVEN;
- return 0;
- }
- /* Add other config variables here and to Documentation/config.txt. */
- return 0;
- }
- 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 && !strcasecmp(value, "always")) {
- git_branch_track = BRANCH_TRACK_ALWAYS;
- 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, "tracking"))
- push_default = PUSH_DEFAULT_TRACKING;
- 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, "
- "tracking 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_string(&git_mailmap_file, 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 *dummy)
- {
- if (!prefixcmp(var, "core."))
- return git_default_core_config(var, value);
- if (!prefixcmp(var, "user."))
- return git_default_user_config(var, value);
- if (!prefixcmp(var, "i18n."))
- return git_default_i18n_config(var, value);
- if (!prefixcmp(var, "branch."))
- return git_default_branch_config(var, value);
- if (!prefixcmp(var, "push."))
- return git_default_push_config(var, value);
- if (!prefixcmp(var, "mailmap."))
- return git_default_mailmap_config(var, value);
- if (!prefixcmp(var, "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;
- }
- /* Add other config variables here and to Documentation/config.txt. */
- return 0;
- }
- int git_config_from_file(config_fn_t fn, const char *filename, void *data)
- {
- int ret;
- FILE *f = fopen(filename, "r");
- ret = -1;
- if (f) {
- config_file = f;
- config_file_name = filename;
- config_linenr = 1;
- config_file_eof = 0;
- ret = git_parse_file(fn, data);
- fclose(f);
- config_file_name = NULL;
- }
- return ret;
- }
- const char *git_etc_gitconfig(void)
- {
- static const char *system_wide;
- if (!system_wide)
- system_wide = system_path(ETC_GITCONFIG);
- return system_wide;
- }
- int git_env_bool(const char *k, int def)
- {
- const char *v = getenv(k);
- return v ? git_config_bool(k, v) : def;
- }
- int git_config_system(void)
- {
- return !git_env_bool("GIT_CONFIG_NOSYSTEM", 0);
- }
- int git_config_global(void)
- {
- return !git_env_bool("GIT_CONFIG_NOGLOBAL", 0);
- }
- int git_config_from_parameters(config_fn_t fn, void *data)
- {
- static int loaded_environment;
- const struct config_item *ct;
- if (!loaded_environment) {
- if (git_config_parse_environment() < 0)
- return -1;
- loaded_environment = 1;
- }
- for (ct = config_parameters; ct; ct = ct->next)
- if (fn(ct->name, ct->value, data) < 0)
- return -1;
- return 0;
- }
- int git_config_early(config_fn_t fn, void *data, const char *repo_config)
- {
- int ret = 0, found = 0;
- const char *home = NULL;
- /* Setting $GIT_CONFIG makes git read _only_ the given config file. */
- if (config_exclusive_filename)
- return git_config_from_file(fn, config_exclusive_filename, data);
- if (git_config_system() && !access(git_etc_gitconfig(), R_OK)) {
- ret += git_config_from_file(fn, git_etc_gitconfig(),
- data);
- found += 1;
- }
- home = getenv("HOME");
- if (git_config_global() && home) {
- char *user_config = xstrdup(mkpath("%s/.gitconfig", home));
- if (!access(user_config, R_OK)) {
- ret += git_config_from_file(fn, user_config, data);
- found += 1;
- }
- free(user_config);
- }
- if (repo_config && !access(repo_config, R_OK)) {
- ret += git_config_from_file(fn, repo_config, data);
- found += 1;
- }
- ret += git_config_from_parameters(fn, data);
- if (config_parameters)
- found += 1;
- return ret == 0 ? found : ret;
- }
- int git_config(config_fn_t fn, void *data)
- {
- char *repo_config = NULL;
- int ret;
- repo_config = git_pathdup("config");
- ret = git_config_early(fn, data, repo_config);
- if (repo_config)
- free(repo_config);
- return ret;
- }
- /*
- * Find all the stuff for git_config_set() below.
- */
- #define MAX_MATCHES 512
- static struct {
- int baselen;
- char *key;
- int do_not_match;
- regex_t *value_regex;
- int multi_replace;
- size_t offset[MAX_MATCHES];
- enum { START, SECTION_SEEN, SECTION_END_SEEN, KEY_SEEN } state;
- int seen;
- } store;
- static int matches(const char *key, const char *value)
- {
- return !strcmp(key, store.key) &&
- (store.value_regex == NULL ||
- (store.do_not_match ^
- !regexec(store.value_regex, value, 0, NULL, 0)));
- }
- static int store_aux(const char *key, const char *value, void *cb)
- {
- const char *ep;
- size_t section_len;
- switch (store.state) {
- case KEY_SEEN:
- if (matches(key, value)) {
- if (store.seen == 1 && store.multi_replace == 0) {
- warning("%s has multiple values", key);
- } else if (store.seen >= MAX_MATCHES) {
- error("too many matches for %s", key);
- return 1;
- }
- store.offset[store.seen] = ftell(config_file);
- store.seen++;
- }
- break;
- case SECTION_SEEN:
- /*
- * What we are looking for is in store.key (both
- * section and var), and its section part is baselen
- * long. We found key (again, both section and var).
- * We would want to know if this key is in the same
- * section as what we are looking for. We already
- * know we are in the same section as what should
- * hold store.key.
- */
- ep = strrchr(key, '.');
- section_len = ep - key;
- if ((section_len != store.baselen) ||
- memcmp(key, store.key, section_len+1)) {
- store.state = SECTION_END_SEEN;
- break;
- }
- /*
- * Do not increment matches: this is no match, but we
- * just made sure we are in the desired section.
- */
- store.offset[store.seen] = ftell(config_file);
- /* fallthru */
- case SECTION_END_SEEN:
- case START:
- if (matches(key, value)) {
- store.offset[store.seen] = ftell(config_file);
- store.state = KEY_SEEN;
- store.seen++;
- } else {
- if (strrchr(key, '.') - key == store.baselen &&
- !strncmp(key, store.key, store.baselen)) {
- store.state = SECTION_SEEN;
- store.offset[store.seen] = ftell(config_file);
- }
- }
- }
- 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 int store_write_section(int fd, const char *key)
- {
- const char *dot;
- int i, success;
- 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_addf(&sb, "[%.*s]\n", store.baselen, key);
- }
- success = write_in_full(fd, sb.buf, sb.len) == sb.len;
- strbuf_release(&sb);
- return success;
- }
- static int store_write_pair(int fd, const char *key, const char *value)
- {
- int i, success;
- int length = strlen(key + store.baselen + 1);
- 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",
- length, 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, '\\');
- default:
- strbuf_addch(&sb, value[i]);
- break;
- }
- strbuf_addf(&sb, "%s\n", quote);
- success = write_in_full(fd, sb.buf, sb.len) == sb.len;
- strbuf_release(&sb);
- return success;
- }
- static ssize_t find_beginning_of_line(const char *contents, size_t size,
- size_t offset_, int *found_bracket)
- {
- size_t equal_offset = size, bracket_offset = size;
- ssize_t offset;
- contline:
- for (offset = offset_-2; offset > 0
- && contents[offset] != '\n'; offset--)
- switch (contents[offset]) {
- case '=': equal_offset = offset; break;
- case ']': bracket_offset = offset; break;
- }
- if (offset > 0 && contents[offset-1] == '\\') {
- offset_ = offset;
- goto contline;
- }
- if (bracket_offset < equal_offset) {
- *found_bracket = 1;
- offset = bracket_offset+1;
- } else
- offset++;
- return offset;
- }
- int git_config_set(const char *key, const char *value)
- {
- return git_config_set_multivar(key, value, NULL, 0);
- }
- /*
- * If value==NULL, unset in (remove from) config,
- * if value_regex!=NULL, disregard key/value pairs where value does not match.
- * if multi_replace==0, nothing, or only one matching key/value is replaced,
- * else all matching key/values (regardless how many) are removed,
- * before the new pair is written.
- *
- * 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(const char *key, const char *value,
- const char *value_regex, int multi_replace)
- {
- int i, dot;
- int fd = -1, in_fd;
- int ret;
- char *config_filename;
- struct lock_file *lock = NULL;
- const char *last_dot = strrchr(key, '.');
- if (config_exclusive_filename)
- config_filename = xstrdup(config_exclusive_filename);
- else
- config_filename = git_pathdup("config");
- /*
- * 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) {
- error("key does not contain a section: %s", key);
- ret = 2;
- goto out_free;
- }
- store.baselen = last_dot - key;
- store.multi_replace = multi_replace;
- /*
- * Validate the key and while at it, lower case it for matching.
- */
- store.key = xmalloc(strlen(key) + 1);
- 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 > store.baselen) {
- if (!iskeychar(c) || (i == store.baselen+1 && !isalpha(c))) {
- error("invalid key: %s", key);
- free(store.key);
- ret = 1;
- goto out_free;
- }
- c = tolower(c);
- } else if (c == '\n') {
- error("invalid key (newline): %s", key);
- free(store.key);
- ret = 1;
- goto out_free;
- }
- store.key[i] = c;
- }
- store.key[i] = 0;
- /*
- * The lock serves a purpose in addition to locking: the new
- * contents of .git/config will be written into it.
- */
- lock = xcalloc(sizeof(struct lock_file), 1);
- fd = hold_lock_file_for_update(lock, config_filename, 0);
- if (fd < 0) {
- error("could not lock config file %s: %s", config_filename, strerror(errno));
- free(store.key);
- ret = -1;
- 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 ) {
- free(store.key);
- if ( ENOENT != errno ) {
- error("opening %s: %s", config_filename,
- strerror(errno));
- ret = 3; /* same as "invalid config file" */
- goto out_free;
- }
- /* if nothing to unset, error out */
- if (value == NULL) {
- ret = 5;
- goto out_free;
- }
- store.key = (char *)key;
- if (!store_write_section(fd, key) ||
- !store_write_pair(fd, key, value))
- goto write_err_out;
- } else {
- struct stat st;
- char *contents;
- size_t contents_sz, copy_begin, copy_end;
- int i, new_line = 0;
- if (value_regex == NULL)
- store.value_regex = NULL;
- else {
- if (value_regex[0] == '!') {
- store.do_not_match = 1;
- value_regex++;
- } else
- store.do_not_match = 0;
- store.value_regex = (regex_t*)xmalloc(sizeof(regex_t));
- if (regcomp(store.value_regex, value_regex,
- REG_EXTENDED)) {
- error("invalid pattern: %s", value_regex);
- free(store.value_regex);
- ret = 6;
- goto out_free;
- }
- }
- store.offset[0] = 0;
- store.state = START;
- store.seen = 0;
- /*
- * After this, store.offset will contain the *end* offset
- * of the last match, or remain at 0 if no match was found.
- * As a side effect, we make sure to transform only a valid
- * existing config file.
- */
- if (git_config_from_file(store_aux, config_filename, NULL)) {
- error("invalid config file %s", config_filename);
- free(store.key);
- if (store.value_regex != NULL) {
- regfree(store.value_regex);
- free(store.value_regex);
- }
- ret = 3;
- goto out_free;
- }
- free(store.key);
- if (store.value_regex != NULL) {
- regfree(store.value_regex);
- free(store.value_regex);
- }
- /* if nothing to unset, or too many matches, error out */
- if ((store.seen == 0 && value == NULL) ||
- (store.seen > 1 && multi_replace == 0)) {
- ret = 5;
- goto out_free;
- }
- fstat(in_fd, &st);
- contents_sz = xsize_t(st.st_size);
- contents = xmmap(NULL, contents_sz, PROT_READ,
- MAP_PRIVATE, in_fd, 0);
- close(in_fd);
- if (store.seen == 0)
- store.seen = 1;
- for (i = 0, copy_begin = 0; i < store.seen; i++) {
- if (store.offset[i] == 0) {
- store.offset[i] = copy_end = contents_sz;
- } else if (store.state != KEY_SEEN) {
- copy_end = store.offset[i];
- } else
- copy_end = find_beginning_of_line(
- contents, contents_sz,
- store.offset[i]-2, &new_line);
- 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) <
- copy_end - copy_begin)
- goto write_err_out;
- if (new_line &&
- write_str_in_full(fd, "\n") != 1)
- goto write_err_out;
- }
- copy_begin = store.offset[i];
- }
- /* write the pair (value == NULL means unset) */
- if (value != NULL) {
- if (store.state == START) {
- if (!store_write_section(fd, key))
- goto write_err_out;
- }
- if (!store_write_pair(fd, key, value))
- 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) <
- contents_sz - copy_begin)
- goto write_err_out;
- munmap(contents, contents_sz);
- }
- if (commit_lock_file(lock) < 0) {
- error("could not commit config file %s", config_filename);
- ret = 4;
- goto out_free;
- }
- /*
- * lock is committed, so don't try to roll it back below.
- * NOTE: Since lockfile.c keeps a linked list of all created
- * lock_file structures, it isn't safe to free(lock). It's
- * better to just leave it hanging around.
- */
- lock = NULL;
- ret = 0;
- out_free:
- if (lock)
- rollback_lock_file(lock);
- free(config_filename);
- return ret;
- write_err_out:
- ret = write_error(lock->filename);
- goto out_free;
- }
- 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;
- }
- /* if new_name == NULL, the section is removed instead */
- int git_config_rename_section(const char *old_name, const char *new_name)
- {
- int ret = 0, remove = 0;
- char *config_filename;
- struct lock_file *lock = xcalloc(sizeof(struct lock_file), 1);
- int out_fd;
- char buf[1024];
- if (config_exclusive_filename)
- config_filename = xstrdup(config_exclusive_filename);
- else
- config_filename = 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"))) {
- /* no config file means nothing to rename, no error */
- goto unlock_and_out;
- }
- while (fgets(buf, sizeof(buf), config_file)) {
- int i;
- int length;
- char *output = buf;
- for (i = 0; buf[i] && isspace(buf[i]); i++)
- ; /* do nothing */
- if (buf[i] == '[') {
- /* it's a section */
- int 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 (!store_write_section(out_fd, new_name)) {
- ret = write_error(lock->filename);
- 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';
- }
- }
- remove = 0;
- }
- if (remove)
- continue;
- length = strlen(output);
- if (write_in_full(out_fd, output, length) != length) {
- ret = write_error(lock->filename);
- goto out;
- }
- }
- fclose(config_file);
- unlock_and_out:
- if (commit_lock_file(lock) < 0)
- ret = error("could not commit config file %s", config_filename);
- out:
- free(config_filename);
- return ret;
- }
- /*
- * Call this to report error for your variable that should not
- * get a boolean value (i.e. "[my] var" means "true").
- */
- int config_error_nonbool(const char *var)
- {
- return error("Missing value for '%s'", var);
- }