git.oblomov.eu Git - git/blob - builtin/config.c

   1 #include "builtin.h"
   2 #include "cache.h"
   3 #include "config.h"
   4 #include "color.h"
   5 #include "parse-options.h"
   6 #include "urlmatch.h"
   7 #include "quote.h"
   8
   9 static const char *const builtin_config_usage[] = {
  10         N_("git config [<options>]"),
  11         NULL
  12 };
  13
  14 static char *key;
  15 static regex_t *key_regexp;
  16 static regex_t *regexp;
  17 static int show_keys;
  18 static int omit_values;
  19 static int use_key_regexp;
  20 static int do_all;
  21 static int do_not_match;
  22 static char delim = '=';
  23 static char key_delim = ' ';
  24 static char term = '\n';
  25
  26 static int use_global_config, use_system_config, use_local_config;
  27 static struct git_config_source given_config_source;
  28 static int actions, types;
  29 static int end_null;
  30 static int respect_includes_opt = -1;
  31 static struct config_options config_options;
  32 static int show_origin;
  33
  34 #define ACTION_GET (1<<0)
  35 #define ACTION_GET_ALL (1<<1)
  36 #define ACTION_GET_REGEXP (1<<2)
  37 #define ACTION_REPLACE_ALL (1<<3)
  38 #define ACTION_ADD (1<<4)
  39 #define ACTION_UNSET (1<<5)
  40 #define ACTION_UNSET_ALL (1<<6)
  41 #define ACTION_RENAME_SECTION (1<<7)
  42 #define ACTION_REMOVE_SECTION (1<<8)
  43 #define ACTION_LIST (1<<9)
  44 #define ACTION_EDIT (1<<10)
  45 #define ACTION_SET (1<<11)
  46 #define ACTION_SET_ALL (1<<12)
  47 #define ACTION_GET_COLOR (1<<13)
  48 #define ACTION_GET_COLORBOOL (1<<14)
  49 #define ACTION_GET_URLMATCH (1<<15)
  50
  51 /*
  52  * The actions "ACTION_LIST | ACTION_GET_*" which may produce more than
  53  * one line of output and which should therefore be paged.
  54  */
  55 #define PAGING_ACTIONS (ACTION_LIST | ACTION_GET_ALL | \
  56                         ACTION_GET_REGEXP | ACTION_GET_URLMATCH)
  57
  58 #define TYPE_BOOL (1<<0)
  59 #define TYPE_INT (1<<1)
  60 #define TYPE_BOOL_OR_INT (1<<2)
  61 #define TYPE_PATH (1<<3)
  62 #define TYPE_EXPIRY_DATE (1<<4)
  63
  64 static struct option builtin_config_options[] = {
  65         OPT_GROUP(N_("Config file location")),
  66         OPT_BOOL(0, "global", &use_global_config, N_("use global config file")),
  67         OPT_BOOL(0, "system", &use_system_config, N_("use system config file")),
  68         OPT_BOOL(0, "local", &use_local_config, N_("use repository config file")),
  69         OPT_STRING('f', "file", &given_config_source.file, N_("file"), N_("use given config file")),
  70         OPT_STRING(0, "blob", &given_config_source.blob, N_("blob-id"), N_("read config from given blob object")),
  71         OPT_GROUP(N_("Action")),
  72         OPT_BIT(0, "get", &actions, N_("get value: name [value-regex]"), ACTION_GET),
  73         OPT_BIT(0, "get-all", &actions, N_("get all values: key [value-regex]"), ACTION_GET_ALL),
  74         OPT_BIT(0, "get-regexp", &actions, N_("get values for regexp: name-regex [value-regex]"), ACTION_GET_REGEXP),
  75         OPT_BIT(0, "get-urlmatch", &actions, N_("get value specific for the URL: section[.var] URL"), ACTION_GET_URLMATCH),
  76         OPT_BIT(0, "replace-all", &actions, N_("replace all matching variables: name value [value_regex]"), ACTION_REPLACE_ALL),
  77         OPT_BIT(0, "add", &actions, N_("add a new variable: name value"), ACTION_ADD),
  78         OPT_BIT(0, "unset", &actions, N_("remove a variable: name [value-regex]"), ACTION_UNSET),
  79         OPT_BIT(0, "unset-all", &actions, N_("remove all matches: name [value-regex]"), ACTION_UNSET_ALL),
  80         OPT_BIT(0, "rename-section", &actions, N_("rename section: old-name new-name"), ACTION_RENAME_SECTION),
  81         OPT_BIT(0, "remove-section", &actions, N_("remove a section: name"), ACTION_REMOVE_SECTION),
  82         OPT_BIT('l', "list", &actions, N_("list all"), ACTION_LIST),
  83         OPT_BIT('e', "edit", &actions, N_("open an editor"), ACTION_EDIT),
  84         OPT_BIT(0, "get-color", &actions, N_("find the color configured: slot [default]"), ACTION_GET_COLOR),
  85         OPT_BIT(0, "get-colorbool", &actions, N_("find the color setting: slot [stdout-is-tty]"), ACTION_GET_COLORBOOL),
  86         OPT_GROUP(N_("Type")),
  87         OPT_BIT(0, "bool", &types, N_("value is \"true\" or \"false\""), TYPE_BOOL),
  88         OPT_BIT(0, "int", &types, N_("value is decimal number"), TYPE_INT),
  89         OPT_BIT(0, "bool-or-int", &types, N_("value is --bool or --int"), TYPE_BOOL_OR_INT),
  90         OPT_BIT(0, "path", &types, N_("value is a path (file or directory name)"), TYPE_PATH),
  91         OPT_BIT(0, "expiry-date", &types, N_("value is an expiry date"), TYPE_EXPIRY_DATE),
  92         OPT_GROUP(N_("Other")),
  93         OPT_BOOL('z', "null", &end_null, N_("terminate values with NUL byte")),
  94         OPT_BOOL(0, "name-only", &omit_values, N_("show variable names only")),
  95         OPT_BOOL(0, "includes", &respect_includes_opt, N_("respect include directives on lookup")),
  96         OPT_BOOL(0, "show-origin", &show_origin, N_("show origin of config (file, standard input, blob, command line)")),
  97         OPT_END(),
  98 };
  99
 100 static void check_argc(int argc, int min, int max) {
 101         if (argc >= min && argc <= max)
 102                 return;
 103         error("wrong number of arguments");
 104         usage_with_options(builtin_config_usage, builtin_config_options);
 105 }
 106
 107 static void show_config_origin(struct strbuf *buf)
 108 {
 109         const char term = end_null ? '\0' : '\t';
 110
 111         strbuf_addstr(buf, current_config_origin_type());
 112         strbuf_addch(buf, ':');
 113         if (end_null)
 114                 strbuf_addstr(buf, current_config_name());
 115         else
 116                 quote_c_style(current_config_name(), buf, NULL, 0);
 117         strbuf_addch(buf, term);
 118 }
 119
 120 static int show_all_config(const char *key_, const char *value_, void *cb)
 121 {
 122         if (show_origin) {
 123                 struct strbuf buf = STRBUF_INIT;
 124                 show_config_origin(&buf);
 125                 /* Use fwrite as "buf" can contain \0's if "end_null" is set. */
 126                 fwrite(buf.buf, 1, buf.len, stdout);
 127                 strbuf_release(&buf);
 128         }
 129         if (!omit_values && value_)
 130                 printf("%s%c%s%c", key_, delim, value_, term);
 131         else
 132                 printf("%s%c", key_, term);
 133         return 0;
 134 }
 135
 136 struct strbuf_list {
 137         struct strbuf *items;
 138         int nr;
 139         int alloc;
 140 };
 141
 142 static int format_config(struct strbuf *buf, const char *key_, const char *value_)
 143 {
 144         if (show_origin)
 145                 show_config_origin(buf);
 146         if (show_keys)
 147                 strbuf_addstr(buf, key_);
 148         if (!omit_values) {
 149                 if (show_keys)
 150                         strbuf_addch(buf, key_delim);
 151
 152                 if (types == TYPE_INT)
 153                         strbuf_addf(buf, "%"PRId64,
 154                                     git_config_int64(key_, value_ ? value_ : ""));
 155                 else if (types == TYPE_BOOL)
 156                         strbuf_addstr(buf, git_config_bool(key_, value_) ?
 157                                       "true" : "false");
 158                 else if (types == TYPE_BOOL_OR_INT) {
 159                         int is_bool, v;
 160                         v = git_config_bool_or_int(key_, value_, &is_bool);
 161                         if (is_bool)
 162                                 strbuf_addstr(buf, v ? "true" : "false");
 163                         else
 164                                 strbuf_addf(buf, "%d", v);
 165                 } else if (types == TYPE_PATH) {
 166                         const char *v;
 167                         if (git_config_pathname(&v, key_, value_) < 0)
 168                                 return -1;
 169                         strbuf_addstr(buf, v);
 170                         free((char *)v);
 171                 } else if (types == TYPE_EXPIRY_DATE) {
 172                         timestamp_t t;
 173                         if (git_config_expiry_date(&t, key_, value_) < 0)
 174                                 return -1;
 175                         strbuf_addf(buf, "%"PRItime, t);
 176                 } else if (value_) {
 177                         strbuf_addstr(buf, value_);
 178                 } else {
 179                         /* Just show the key name; back out delimiter */
 180                         if (show_keys)
 181                                 strbuf_setlen(buf, buf->len - 1);
 182                 }
 183         }
 184         strbuf_addch(buf, term);
 185         return 0;
 186 }
 187
 188 static int collect_config(const char *key_, const char *value_, void *cb)
 189 {
 190         struct strbuf_list *values = cb;
 191
 192         if (!use_key_regexp && strcmp(key_, key))
 193                 return 0;
 194         if (use_key_regexp && regexec(key_regexp, key_, 0, NULL, 0))
 195                 return 0;
 196         if (regexp != NULL &&
 197             (do_not_match ^ !!regexec(regexp, (value_?value_:""), 0, NULL, 0)))
 198                 return 0;
 199
 200         ALLOC_GROW(values->items, values->nr + 1, values->alloc);
 201         strbuf_init(&values->items[values->nr], 0);
 202
 203         return format_config(&values->items[values->nr++], key_, value_);
 204 }
 205
 206 static int get_value(const char *key_, const char *regex_)
 207 {
 208         int ret = CONFIG_GENERIC_ERROR;
 209         struct strbuf_list values = {NULL};
 210         int i;
 211
 212         if (use_key_regexp) {
 213                 char *tl;
 214
 215                 /*
 216                  * NEEDSWORK: this naive pattern lowercasing obviously does not
 217                  * work for more complex patterns like "^[^.]*Foo.*bar".
 218                  * Perhaps we should deprecate this altogether someday.
 219                  */
 220
 221                 key = xstrdup(key_);
 222                 for (tl = key + strlen(key) - 1;
 223                      tl >= key && *tl != '.';
 224                      tl--)
 225                         *tl = tolower(*tl);
 226                 for (tl = key; *tl && *tl != '.'; tl++)
 227                         *tl = tolower(*tl);
 228
 229                 key_regexp = (regex_t*)xmalloc(sizeof(regex_t));
 230                 if (regcomp(key_regexp, key, REG_EXTENDED)) {
 231                         error("invalid key pattern: %s", key_);
 232                         FREE_AND_NULL(key_regexp);
 233                         ret = CONFIG_INVALID_PATTERN;
 234                         goto free_strings;
 235                 }
 236         } else {
 237                 if (git_config_parse_key(key_, &key, NULL)) {
 238                         ret = CONFIG_INVALID_KEY;
 239                         goto free_strings;
 240                 }
 241         }
 242
 243         if (regex_) {
 244                 if (regex_[0] == '!') {
 245                         do_not_match = 1;
 246                         regex_++;
 247                 }
 248
 249                 regexp = (regex_t*)xmalloc(sizeof(regex_t));
 250                 if (regcomp(regexp, regex_, REG_EXTENDED)) {
 251                         error("invalid pattern: %s", regex_);
 252                         FREE_AND_NULL(regexp);
 253                         ret = CONFIG_INVALID_PATTERN;
 254                         goto free_strings;
 255                 }
 256         }
 257
 258         config_with_options(collect_config, &values,
 259                             &given_config_source, &config_options);
 260
 261         ret = !values.nr;
 262
 263         for (i = 0; i < values.nr; i++) {
 264                 struct strbuf *buf = values.items + i;
 265                 if (do_all || i == values.nr - 1)
 266                         fwrite(buf->buf, 1, buf->len, stdout);
 267                 strbuf_release(buf);
 268         }
 269         free(values.items);
 270
 271 free_strings:
 272         free(key);
 273         if (key_regexp) {
 274                 regfree(key_regexp);
 275                 free(key_regexp);
 276         }
 277         if (regexp) {
 278                 regfree(regexp);
 279                 free(regexp);
 280         }
 281
 282         return ret;
 283 }
 284
 285 static char *normalize_value(const char *key, const char *value)
 286 {
 287         if (!value)
 288                 return NULL;
 289
 290         if (types == 0 || types == TYPE_PATH || types == TYPE_EXPIRY_DATE)
 291                 /*
 292                  * We don't do normalization for TYPE_PATH here: If
 293                  * the path is like ~/foobar/, we prefer to store
 294                  * "~/foobar/" in the config file, and to expand the ~
 295                  * when retrieving the value.
 296                  * Also don't do normalization for expiry dates.
 297                  */
 298                 return xstrdup(value);
 299         if (types == TYPE_INT)
 300                 return xstrfmt("%"PRId64, git_config_int64(key, value));
 301         if (types == TYPE_BOOL)
 302                 return xstrdup(git_config_bool(key, value) ?  "true" : "false");
 303         if (types == TYPE_BOOL_OR_INT) {
 304                 int is_bool, v;
 305                 v = git_config_bool_or_int(key, value, &is_bool);
 306                 if (!is_bool)
 307                         return xstrfmt("%d", v);
 308                 else
 309                         return xstrdup(v ? "true" : "false");
 310         }
 311
 312         die("BUG: cannot normalize type %d", types);
 313 }
 314
 315 static int get_color_found;
 316 static const char *get_color_slot;
 317 static const char *get_colorbool_slot;
 318 static char parsed_color[COLOR_MAXLEN];
 319
 320 static int git_get_color_config(const char *var, const char *value, void *cb)
 321 {
 322         if (!strcmp(var, get_color_slot)) {
 323                 if (!value)
 324                         config_error_nonbool(var);
 325                 if (color_parse(value, parsed_color) < 0)
 326                         return -1;
 327                 get_color_found = 1;
 328         }
 329         return 0;
 330 }
 331
 332 static void get_color(const char *var, const char *def_color)
 333 {
 334         get_color_slot = var;
 335         get_color_found = 0;
 336         parsed_color[0] = '\0';
 337         config_with_options(git_get_color_config, NULL,
 338                             &given_config_source, &config_options);
 339
 340         if (!get_color_found && def_color) {
 341                 if (color_parse(def_color, parsed_color) < 0)
 342                         die(_("unable to parse default color value"));
 343         }
 344
 345         fputs(parsed_color, stdout);
 346 }
 347
 348 static int get_colorbool_found;
 349 static int get_diff_color_found;
 350 static int get_color_ui_found;
 351 static int git_get_colorbool_config(const char *var, const char *value,
 352                 void *cb)
 353 {
 354         if (!strcmp(var, get_colorbool_slot))
 355                 get_colorbool_found = git_config_colorbool(var, value);
 356         else if (!strcmp(var, "diff.color"))
 357                 get_diff_color_found = git_config_colorbool(var, value);
 358         else if (!strcmp(var, "color.ui"))
 359                 get_color_ui_found = git_config_colorbool(var, value);
 360         return 0;
 361 }
 362
 363 static int get_colorbool(const char *var, int print)
 364 {
 365         get_colorbool_slot = var;
 366         get_colorbool_found = -1;
 367         get_diff_color_found = -1;
 368         get_color_ui_found = -1;
 369         config_with_options(git_get_colorbool_config, NULL,
 370                             &given_config_source, &config_options);
 371
 372         if (get_colorbool_found < 0) {
 373                 if (!strcmp(get_colorbool_slot, "color.diff"))
 374                         get_colorbool_found = get_diff_color_found;
 375                 if (get_colorbool_found < 0)
 376                         get_colorbool_found = get_color_ui_found;
 377         }
 378
 379         if (get_colorbool_found < 0)
 380                 /* default value if none found in config */
 381                 get_colorbool_found = GIT_COLOR_AUTO;
 382
 383         get_colorbool_found = want_color(get_colorbool_found);
 384
 385         if (print) {
 386                 printf("%s\n", get_colorbool_found ? "true" : "false");
 387                 return 0;
 388         } else
 389                 return get_colorbool_found ? 0 : 1;
 390 }
 391
 392 static void check_write(void)
 393 {
 394         if (!given_config_source.file && !startup_info->have_repository)
 395                 die("not in a git directory");
 396
 397         if (given_config_source.use_stdin)
 398                 die("writing to stdin is not supported");
 399
 400         if (given_config_source.blob)
 401                 die("writing config blobs is not supported");
 402 }
 403
 404 struct urlmatch_current_candidate_value {
 405         char value_is_null;
 406         struct strbuf value;
 407 };
 408
 409 static int urlmatch_collect_fn(const char *var, const char *value, void *cb)
 410 {
 411         struct string_list *values = cb;
 412         struct string_list_item *item = string_list_insert(values, var);
 413         struct urlmatch_current_candidate_value *matched = item->util;
 414
 415         if (!matched) {
 416                 matched = xmalloc(sizeof(*matched));
 417                 strbuf_init(&matched->value, 0);
 418                 item->util = matched;
 419         } else {
 420                 strbuf_reset(&matched->value);
 421         }
 422
 423         if (value) {
 424                 strbuf_addstr(&matched->value, value);
 425                 matched->value_is_null = 0;
 426         } else {
 427                 matched->value_is_null = 1;
 428         }
 429         return 0;
 430 }
 431
 432 static int get_urlmatch(const char *var, const char *url)
 433 {
 434         int ret;
 435         char *section_tail;
 436         struct string_list_item *item;
 437         struct urlmatch_config config = { STRING_LIST_INIT_DUP };
 438         struct string_list values = STRING_LIST_INIT_DUP;
 439
 440         config.collect_fn = urlmatch_collect_fn;
 441         config.cascade_fn = NULL;
 442         config.cb = &values;
 443
 444         if (!url_normalize(url, &config.url))
 445                 die("%s", config.url.err);
 446
 447         config.section = xstrdup_tolower(var);
 448         section_tail = strchr(config.section, '.');
 449         if (section_tail) {
 450                 *section_tail = '\0';
 451                 config.key = section_tail + 1;
 452                 show_keys = 0;
 453         } else {
 454                 config.key = NULL;
 455                 show_keys = 1;
 456         }
 457
 458         config_with_options(urlmatch_config_entry, &config,
 459                             &given_config_source, &config_options);
 460
 461         ret = !values.nr;
 462
 463         for_each_string_list_item(item, &values) {
 464                 struct urlmatch_current_candidate_value *matched = item->util;
 465                 struct strbuf buf = STRBUF_INIT;
 466
 467                 format_config(&buf, item->string,
 468                               matched->value_is_null ? NULL : matched->value.buf);
 469                 fwrite(buf.buf, 1, buf.len, stdout);
 470                 strbuf_release(&buf);
 471
 472                 strbuf_release(&matched->value);
 473         }
 474         string_list_clear(&config.vars, 1);
 475         string_list_clear(&values, 1);
 476         free(config.url.url);
 477
 478         free((void *)config.section);
 479         return ret;
 480 }
 481
 482 static char *default_user_config(void)
 483 {
 484         struct strbuf buf = STRBUF_INIT;
 485         strbuf_addf(&buf,
 486                     _("# This is Git's per-user configuration file.\n"
 487                       "[user]\n"
 488                       "# Please adapt and uncomment the following lines:\n"
 489                       "#        name = %s\n"
 490                       "#        email = %s\n"),
 491                     ident_default_name(),
 492                     ident_default_email());
 493         return strbuf_detach(&buf, NULL);
 494 }
 495
 496 int cmd_config(int argc, const char **argv, const char *prefix)
 497 {
 498         int nongit = !startup_info->have_repository;
 499         char *value;
 500
 501         given_config_source.file = getenv(CONFIG_ENVIRONMENT);
 502
 503         argc = parse_options(argc, argv, prefix, builtin_config_options,
 504                              builtin_config_usage,
 505                              PARSE_OPT_STOP_AT_NON_OPTION);
 506
 507         if (use_global_config + use_system_config + use_local_config +
 508             !!given_config_source.file + !!given_config_source.blob > 1) {
 509                 error("only one config file at a time.");
 510                 usage_with_options(builtin_config_usage, builtin_config_options);
 511         }
 512
 513         if (use_local_config && nongit)
 514                 die(_("--local can only be used inside a git repository"));
 515
 516         if (given_config_source.file &&
 517                         !strcmp(given_config_source.file, "-")) {
 518                 given_config_source.file = NULL;
 519                 given_config_source.use_stdin = 1;
 520         }
 521
 522         if (use_global_config) {
 523                 char *user_config = expand_user_path("~/.gitconfig", 0);
 524                 char *xdg_config = xdg_config_home("config");
 525
 526                 if (!user_config)
 527                         /*
 528                          * It is unknown if HOME/.gitconfig exists, so
 529                          * we do not know if we should write to XDG
 530                          * location; error out even if XDG_CONFIG_HOME
 531                          * is set and points at a sane location.
 532                          */
 533                         die("$HOME not set");
 534
 535                 if (access_or_warn(user_config, R_OK, 0) &&
 536                     xdg_config && !access_or_warn(xdg_config, R_OK, 0)) {
 537                         given_config_source.file = xdg_config;
 538                         free(user_config);
 539                 } else {
 540                         given_config_source.file = user_config;
 541                         free(xdg_config);
 542                 }
 543         }
 544         else if (use_system_config)
 545                 given_config_source.file = git_etc_gitconfig();
 546         else if (use_local_config)
 547                 given_config_source.file = git_pathdup("config");
 548         else if (given_config_source.file) {
 549                 if (!is_absolute_path(given_config_source.file) && prefix)
 550                         given_config_source.file =
 551                                 prefix_filename(prefix, given_config_source.file);
 552         }
 553
 554         if (respect_includes_opt == -1)
 555                 config_options.respect_includes = !given_config_source.file;
 556         else
 557                 config_options.respect_includes = respect_includes_opt;
 558         if (!nongit) {
 559                 config_options.commondir = get_git_common_dir();
 560                 config_options.git_dir = get_git_dir();
 561         }
 562
 563         if (end_null) {
 564                 term = '\0';
 565                 delim = '\n';
 566                 key_delim = '\n';
 567         }
 568
 569         if (HAS_MULTI_BITS(types)) {
 570                 error("only one type at a time.");
 571                 usage_with_options(builtin_config_usage, builtin_config_options);
 572         }
 573
 574         if ((actions & (ACTION_GET_COLOR|ACTION_GET_COLORBOOL)) && types) {
 575                 error("--get-color and variable type are incoherent");
 576                 usage_with_options(builtin_config_usage, builtin_config_options);
 577         }
 578
 579         if (HAS_MULTI_BITS(actions)) {
 580                 error("only one action at a time.");
 581                 usage_with_options(builtin_config_usage, builtin_config_options);
 582         }
 583         if (actions == 0)
 584                 switch (argc) {
 585                 case 1: actions = ACTION_GET; break;
 586                 case 2: actions = ACTION_SET; break;
 587                 case 3: actions = ACTION_SET_ALL; break;
 588                 default:
 589                         usage_with_options(builtin_config_usage, builtin_config_options);
 590                 }
 591         if (omit_values &&
 592             !(actions == ACTION_LIST || actions == ACTION_GET_REGEXP)) {
 593                 error("--name-only is only applicable to --list or --get-regexp");
 594                 usage_with_options(builtin_config_usage, builtin_config_options);
 595         }
 596
 597         if (show_origin && !(actions &
 598                 (ACTION_GET|ACTION_GET_ALL|ACTION_GET_REGEXP|ACTION_LIST))) {
 599                 error("--show-origin is only applicable to --get, --get-all, "
 600                           "--get-regexp, and --list.");
 601                 usage_with_options(builtin_config_usage, builtin_config_options);
 602         }
 603
 604         if (actions & PAGING_ACTIONS)
 605                 setup_auto_pager("config", 1);
 606
 607         if (actions == ACTION_LIST) {
 608                 check_argc(argc, 0, 0);
 609                 if (config_with_options(show_all_config, NULL,
 610                                         &given_config_source,
 611                                         &config_options) < 0) {
 612                         if (given_config_source.file)
 613                                 die_errno("unable to read config file '%s'",
 614                                           given_config_source.file);
 615                         else
 616                                 die("error processing config file(s)");
 617                 }
 618         }
 619         else if (actions == ACTION_EDIT) {
 620                 char *config_file;
 621
 622                 check_argc(argc, 0, 0);
 623                 if (!given_config_source.file && nongit)
 624                         die("not in a git directory");
 625                 if (given_config_source.use_stdin)
 626                         die("editing stdin is not supported");
 627                 if (given_config_source.blob)
 628                         die("editing blobs is not supported");
 629                 git_config(git_default_config, NULL);
 630                 config_file = given_config_source.file ?
 631                                 xstrdup(given_config_source.file) :
 632                                 git_pathdup("config");
 633                 if (use_global_config) {
 634                         int fd = open(config_file, O_CREAT | O_EXCL | O_WRONLY, 0666);
 635                         if (fd >= 0) {
 636                                 char *content = default_user_config();
 637                                 write_str_in_full(fd, content);
 638                                 free(content);
 639                                 close(fd);
 640                         }
 641                         else if (errno != EEXIST)
 642                                 die_errno(_("cannot create configuration file %s"), config_file);
 643                 }
 644                 launch_editor(config_file, NULL, NULL);
 645                 free(config_file);
 646         }
 647         else if (actions == ACTION_SET) {
 648                 int ret;
 649                 check_write();
 650                 check_argc(argc, 2, 2);
 651                 value = normalize_value(argv[0], argv[1]);
 652                 UNLEAK(value);
 653                 ret = git_config_set_in_file_gently(given_config_source.file, argv[0], value);
 654                 if (ret == CONFIG_NOTHING_SET)
 655                         error(_("cannot overwrite multiple values with a single value\n"
 656                         "       Use a regexp, --add or --replace-all to change %s."), argv[0]);
 657                 return ret;
 658         }
 659         else if (actions == ACTION_SET_ALL) {
 660                 check_write();
 661                 check_argc(argc, 2, 3);
 662                 value = normalize_value(argv[0], argv[1]);
 663                 UNLEAK(value);
 664                 return git_config_set_multivar_in_file_gently(given_config_source.file,
 665                                                               argv[0], value, argv[2], 0);
 666         }
 667         else if (actions == ACTION_ADD) {
 668                 check_write();
 669                 check_argc(argc, 2, 2);
 670                 value = normalize_value(argv[0], argv[1]);
 671                 UNLEAK(value);
 672                 return git_config_set_multivar_in_file_gently(given_config_source.file,
 673                                                               argv[0], value,
 674                                                               CONFIG_REGEX_NONE, 0);
 675         }
 676         else if (actions == ACTION_REPLACE_ALL) {
 677                 check_write();
 678                 check_argc(argc, 2, 3);
 679                 value = normalize_value(argv[0], argv[1]);
 680                 UNLEAK(value);
 681                 return git_config_set_multivar_in_file_gently(given_config_source.file,
 682                                                               argv[0], value, argv[2], 1);
 683         }
 684         else if (actions == ACTION_GET) {
 685                 check_argc(argc, 1, 2);
 686                 return get_value(argv[0], argv[1]);
 687         }
 688         else if (actions == ACTION_GET_ALL) {
 689                 do_all = 1;
 690                 check_argc(argc, 1, 2);
 691                 return get_value(argv[0], argv[1]);
 692         }
 693         else if (actions == ACTION_GET_REGEXP) {
 694                 show_keys = 1;
 695                 use_key_regexp = 1;
 696                 do_all = 1;
 697                 check_argc(argc, 1, 2);
 698                 return get_value(argv[0], argv[1]);
 699         }
 700         else if (actions == ACTION_GET_URLMATCH) {
 701                 check_argc(argc, 2, 2);
 702                 return get_urlmatch(argv[0], argv[1]);
 703         }
 704         else if (actions == ACTION_UNSET) {
 705                 check_write();
 706                 check_argc(argc, 1, 2);
 707                 if (argc == 2)
 708                         return git_config_set_multivar_in_file_gently(given_config_source.file,
 709                                                                       argv[0], NULL, argv[1], 0);
 710                 else
 711                         return git_config_set_in_file_gently(given_config_source.file,
 712                                                              argv[0], NULL);
 713         }
 714         else if (actions == ACTION_UNSET_ALL) {
 715                 check_write();
 716                 check_argc(argc, 1, 2);
 717                 return git_config_set_multivar_in_file_gently(given_config_source.file,
 718                                                               argv[0], NULL, argv[1], 1);
 719         }
 720         else if (actions == ACTION_RENAME_SECTION) {
 721                 int ret;
 722                 check_write();
 723                 check_argc(argc, 2, 2);
 724                 ret = git_config_rename_section_in_file(given_config_source.file,
 725                                                         argv[0], argv[1]);
 726                 if (ret < 0)
 727                         return ret;
 728                 if (ret == 0)
 729                         die("No such section!");
 730         }
 731         else if (actions == ACTION_REMOVE_SECTION) {
 732                 int ret;
 733                 check_write();
 734                 check_argc(argc, 1, 1);
 735                 ret = git_config_rename_section_in_file(given_config_source.file,
 736                                                         argv[0], NULL);
 737                 if (ret < 0)
 738                         return ret;
 739                 if (ret == 0)
 740                         die("No such section!");
 741         }
 742         else if (actions == ACTION_GET_COLOR) {
 743                 check_argc(argc, 1, 2);
 744                 get_color(argv[0], argv[1]);
 745         }
 746         else if (actions == ACTION_GET_COLORBOOL) {
 747                 check_argc(argc, 1, 2);
 748                 if (argc == 2)
 749                         color_stdout_is_tty = git_config_bool("command line", argv[1]);
 750                 return get_colorbool(argv[0], argc == 2);
 751         }
 752
 753         return 0;
 754 }