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 #include "worktree.h"
   9
  10 static const char *const builtin_config_usage[] = {
  11         N_("git config [<options>]"),
  12         NULL
  13 };
  14
  15 static char *key;
  16 static regex_t *key_regexp;
  17 static regex_t *regexp;
  18 static int show_keys;
  19 static int omit_values;
  20 static int use_key_regexp;
  21 static int do_all;
  22 static int do_not_match;
  23 static char delim = '=';
  24 static char key_delim = ' ';
  25 static char term = '\n';
  26
  27 static int use_global_config, use_system_config, use_local_config;
  28 static int use_worktree_config;
  29 static struct git_config_source given_config_source;
  30 static int actions, type;
  31 static char *default_value;
  32 static int end_nul;
  33 static int respect_includes_opt = -1;
  34 static struct config_options config_options;
  35 static int show_origin;
  36 static int show_scope;
  37
  38 #define ACTION_GET (1<<0)
  39 #define ACTION_GET_ALL (1<<1)
  40 #define ACTION_GET_REGEXP (1<<2)
  41 #define ACTION_REPLACE_ALL (1<<3)
  42 #define ACTION_ADD (1<<4)
  43 #define ACTION_UNSET (1<<5)
  44 #define ACTION_UNSET_ALL (1<<6)
  45 #define ACTION_RENAME_SECTION (1<<7)
  46 #define ACTION_REMOVE_SECTION (1<<8)
  47 #define ACTION_LIST (1<<9)
  48 #define ACTION_EDIT (1<<10)
  49 #define ACTION_SET (1<<11)
  50 #define ACTION_SET_ALL (1<<12)
  51 #define ACTION_GET_COLOR (1<<13)
  52 #define ACTION_GET_COLORBOOL (1<<14)
  53 #define ACTION_GET_URLMATCH (1<<15)
  54
  55 /*
  56  * The actions "ACTION_LIST | ACTION_GET_*" which may produce more than
  57  * one line of output and which should therefore be paged.
  58  */
  59 #define PAGING_ACTIONS (ACTION_LIST | ACTION_GET_ALL | \
  60                         ACTION_GET_REGEXP | ACTION_GET_URLMATCH)
  61
  62 #define TYPE_BOOL               1
  63 #define TYPE_INT                2
  64 #define TYPE_BOOL_OR_INT        3
  65 #define TYPE_PATH               4
  66 #define TYPE_EXPIRY_DATE        5
  67 #define TYPE_COLOR              6
  68 #define TYPE_BOOL_OR_STR        7
  69
  70 #define OPT_CALLBACK_VALUE(s, l, v, h, i) \
  71         { OPTION_CALLBACK, (s), (l), (v), NULL, (h), PARSE_OPT_NOARG | \
  72         PARSE_OPT_NONEG, option_parse_type, (i) }
  73
  74 static NORETURN void usage_builtin_config(void);
  75
  76 static int option_parse_type(const struct option *opt, const char *arg,
  77                              int unset)
  78 {
  79         int new_type, *to_type;
  80
  81         if (unset) {
  82                 *((int *) opt->value) = 0;
  83                 return 0;
  84         }
  85
  86         /*
  87          * To support '--<type>' style flags, begin with new_type equal to
  88          * opt->defval.
  89          */
  90         new_type = opt->defval;
  91         if (!new_type) {
  92                 if (!strcmp(arg, "bool"))
  93                         new_type = TYPE_BOOL;
  94                 else if (!strcmp(arg, "int"))
  95                         new_type = TYPE_INT;
  96                 else if (!strcmp(arg, "bool-or-int"))
  97                         new_type = TYPE_BOOL_OR_INT;
  98                 else if (!strcmp(arg, "bool-or-str"))
  99                         new_type = TYPE_BOOL_OR_STR;
 100                 else if (!strcmp(arg, "path"))
 101                         new_type = TYPE_PATH;
 102                 else if (!strcmp(arg, "expiry-date"))
 103                         new_type = TYPE_EXPIRY_DATE;
 104                 else if (!strcmp(arg, "color"))
 105                         new_type = TYPE_COLOR;
 106                 else
 107                         die(_("unrecognized --type argument, %s"), arg);
 108         }
 109
 110         to_type = opt->value;
 111         if (*to_type && *to_type != new_type) {
 112                 /*
 113                  * Complain when there is a new type not equal to the old type.
 114                  * This allows for combinations like '--int --type=int' and
 115                  * '--type=int --type=int', but disallows ones like '--type=bool
 116                  * --int' and '--type=bool
 117                  * --type=int'.
 118                  */
 119                 error(_("only one type at a time"));
 120                 usage_builtin_config();
 121         }
 122         *to_type = new_type;
 123
 124         return 0;
 125 }
 126
 127 static struct option builtin_config_options[] = {
 128         OPT_GROUP(N_("Config file location")),
 129         OPT_BOOL(0, "global", &use_global_config, N_("use global config file")),
 130         OPT_BOOL(0, "system", &use_system_config, N_("use system config file")),
 131         OPT_BOOL(0, "local", &use_local_config, N_("use repository config file")),
 132         OPT_BOOL(0, "worktree", &use_worktree_config, N_("use per-worktree config file")),
 133         OPT_STRING('f', "file", &given_config_source.file, N_("file"), N_("use given config file")),
 134         OPT_STRING(0, "blob", &given_config_source.blob, N_("blob-id"), N_("read config from given blob object")),
 135         OPT_GROUP(N_("Action")),
 136         OPT_BIT(0, "get", &actions, N_("get value: name [value-regex]"), ACTION_GET),
 137         OPT_BIT(0, "get-all", &actions, N_("get all values: key [value-regex]"), ACTION_GET_ALL),
 138         OPT_BIT(0, "get-regexp", &actions, N_("get values for regexp: name-regex [value-regex]"), ACTION_GET_REGEXP),
 139         OPT_BIT(0, "get-urlmatch", &actions, N_("get value specific for the URL: section[.var] URL"), ACTION_GET_URLMATCH),
 140         OPT_BIT(0, "replace-all", &actions, N_("replace all matching variables: name value [value_regex]"), ACTION_REPLACE_ALL),
 141         OPT_BIT(0, "add", &actions, N_("add a new variable: name value"), ACTION_ADD),
 142         OPT_BIT(0, "unset", &actions, N_("remove a variable: name [value-regex]"), ACTION_UNSET),
 143         OPT_BIT(0, "unset-all", &actions, N_("remove all matches: name [value-regex]"), ACTION_UNSET_ALL),
 144         OPT_BIT(0, "rename-section", &actions, N_("rename section: old-name new-name"), ACTION_RENAME_SECTION),
 145         OPT_BIT(0, "remove-section", &actions, N_("remove a section: name"), ACTION_REMOVE_SECTION),
 146         OPT_BIT('l', "list", &actions, N_("list all"), ACTION_LIST),
 147         OPT_BIT('e', "edit", &actions, N_("open an editor"), ACTION_EDIT),
 148         OPT_BIT(0, "get-color", &actions, N_("find the color configured: slot [default]"), ACTION_GET_COLOR),
 149         OPT_BIT(0, "get-colorbool", &actions, N_("find the color setting: slot [stdout-is-tty]"), ACTION_GET_COLORBOOL),
 150         OPT_GROUP(N_("Type")),
 151         OPT_CALLBACK('t', "type", &type, "", N_("value is given this type"), option_parse_type),
 152         OPT_CALLBACK_VALUE(0, "bool", &type, N_("value is \"true\" or \"false\""), TYPE_BOOL),
 153         OPT_CALLBACK_VALUE(0, "int", &type, N_("value is decimal number"), TYPE_INT),
 154         OPT_CALLBACK_VALUE(0, "bool-or-int", &type, N_("value is --bool or --int"), TYPE_BOOL_OR_INT),
 155         OPT_CALLBACK_VALUE(0, "bool-or-str", &type, N_("value is --bool or string"), TYPE_BOOL_OR_STR),
 156         OPT_CALLBACK_VALUE(0, "path", &type, N_("value is a path (file or directory name)"), TYPE_PATH),
 157         OPT_CALLBACK_VALUE(0, "expiry-date", &type, N_("value is an expiry date"), TYPE_EXPIRY_DATE),
 158         OPT_GROUP(N_("Other")),
 159         OPT_BOOL('z', "null", &end_nul, N_("terminate values with NUL byte")),
 160         OPT_BOOL(0, "name-only", &omit_values, N_("show variable names only")),
 161         OPT_BOOL(0, "includes", &respect_includes_opt, N_("respect include directives on lookup")),
 162         OPT_BOOL(0, "show-origin", &show_origin, N_("show origin of config (file, standard input, blob, command line)")),
 163         OPT_BOOL(0, "show-scope", &show_scope, N_("show scope of config (worktree, local, global, system, command)")),
 164         OPT_STRING(0, "default", &default_value, N_("value"), N_("with --get, use default value when missing entry")),
 165         OPT_END(),
 166 };
 167
 168 static NORETURN void usage_builtin_config(void)
 169 {
 170         usage_with_options(builtin_config_usage, builtin_config_options);
 171 }
 172
 173 static void check_argc(int argc, int min, int max)
 174 {
 175         if (argc >= min && argc <= max)
 176                 return;
 177         if (min == max)
 178                 error(_("wrong number of arguments, should be %d"), min);
 179         else
 180                 error(_("wrong number of arguments, should be from %d to %d"),
 181                       min, max);
 182         usage_builtin_config();
 183 }
 184
 185 static void show_config_origin(struct strbuf *buf)
 186 {
 187         const char term = end_nul ? '\0' : '\t';
 188
 189         strbuf_addstr(buf, current_config_origin_type());
 190         strbuf_addch(buf, ':');
 191         if (end_nul)
 192                 strbuf_addstr(buf, current_config_name());
 193         else
 194                 quote_c_style(current_config_name(), buf, NULL, 0);
 195         strbuf_addch(buf, term);
 196 }
 197
 198 static void show_config_scope(struct strbuf *buf)
 199 {
 200         const char term = end_nul ? '\0' : '\t';
 201         const char *scope = config_scope_name(current_config_scope());
 202
 203         strbuf_addstr(buf, N_(scope));
 204         strbuf_addch(buf, term);
 205 }
 206
 207 static int show_all_config(const char *key_, const char *value_, void *cb)
 208 {
 209         if (show_origin || show_scope) {
 210                 struct strbuf buf = STRBUF_INIT;
 211                 if (show_scope)
 212                         show_config_scope(&buf);
 213                 if (show_origin)
 214                         show_config_origin(&buf);
 215                 /* Use fwrite as "buf" can contain \0's if "end_null" is set. */
 216                 fwrite(buf.buf, 1, buf.len, stdout);
 217                 strbuf_release(&buf);
 218         }
 219         if (!omit_values && value_)
 220                 printf("%s%c%s%c", key_, delim, value_, term);
 221         else
 222                 printf("%s%c", key_, term);
 223         return 0;
 224 }
 225
 226 struct strbuf_list {
 227         struct strbuf *items;
 228         int nr;
 229         int alloc;
 230 };
 231
 232 static int format_config(struct strbuf *buf, const char *key_, const char *value_)
 233 {
 234         if (show_scope)
 235                 show_config_scope(buf);
 236         if (show_origin)
 237                 show_config_origin(buf);
 238         if (show_keys)
 239                 strbuf_addstr(buf, key_);
 240         if (!omit_values) {
 241                 if (show_keys)
 242                         strbuf_addch(buf, key_delim);
 243
 244                 if (type == TYPE_INT)
 245                         strbuf_addf(buf, "%"PRId64,
 246                                     git_config_int64(key_, value_ ? value_ : ""));
 247                 else if (type == TYPE_BOOL)
 248                         strbuf_addstr(buf, git_config_bool(key_, value_) ?
 249                                       "true" : "false");
 250                 else if (type == TYPE_BOOL_OR_INT) {
 251                         int is_bool, v;
 252                         v = git_config_bool_or_int(key_, value_, &is_bool);
 253                         if (is_bool)
 254                                 strbuf_addstr(buf, v ? "true" : "false");
 255                         else
 256                                 strbuf_addf(buf, "%d", v);
 257                 } else if (type == TYPE_BOOL_OR_STR) {
 258                         int v = git_parse_maybe_bool(value_);
 259                         if (v < 0)
 260                                 strbuf_addstr(buf, value_);
 261                         else
 262                                 strbuf_addstr(buf, v ? "true" : "false");
 263                 } else if (type == TYPE_PATH) {
 264                         const char *v;
 265                         if (git_config_pathname(&v, key_, value_) < 0)
 266                                 return -1;
 267                         strbuf_addstr(buf, v);
 268                         free((char *)v);
 269                 } else if (type == TYPE_EXPIRY_DATE) {
 270                         timestamp_t t;
 271                         if (git_config_expiry_date(&t, key_, value_) < 0)
 272                                 return -1;
 273                         strbuf_addf(buf, "%"PRItime, t);
 274                 } else if (type == TYPE_COLOR) {
 275                         char v[COLOR_MAXLEN];
 276                         if (git_config_color(v, key_, value_) < 0)
 277                                 return -1;
 278                         strbuf_addstr(buf, v);
 279                 } else if (value_) {
 280                         strbuf_addstr(buf, value_);
 281                 } else {
 282                         /* Just show the key name; back out delimiter */
 283                         if (show_keys)
 284                                 strbuf_setlen(buf, buf->len - 1);
 285                 }
 286         }
 287         strbuf_addch(buf, term);
 288         return 0;
 289 }
 290
 291 static int collect_config(const char *key_, const char *value_, void *cb)
 292 {
 293         struct strbuf_list *values = cb;
 294
 295         if (!use_key_regexp && strcmp(key_, key))
 296                 return 0;
 297         if (use_key_regexp && regexec(key_regexp, key_, 0, NULL, 0))
 298                 return 0;
 299         if (regexp != NULL &&
 300             (do_not_match ^ !!regexec(regexp, (value_?value_:""), 0, NULL, 0)))
 301                 return 0;
 302
 303         ALLOC_GROW(values->items, values->nr + 1, values->alloc);
 304         strbuf_init(&values->items[values->nr], 0);
 305
 306         return format_config(&values->items[values->nr++], key_, value_);
 307 }
 308
 309 static int get_value(const char *key_, const char *regex_)
 310 {
 311         int ret = CONFIG_GENERIC_ERROR;
 312         struct strbuf_list values = {NULL};
 313         int i;
 314
 315         if (use_key_regexp) {
 316                 char *tl;
 317
 318                 /*
 319                  * NEEDSWORK: this naive pattern lowercasing obviously does not
 320                  * work for more complex patterns like "^[^.]*Foo.*bar".
 321                  * Perhaps we should deprecate this altogether someday.
 322                  */
 323
 324                 key = xstrdup(key_);
 325                 for (tl = key + strlen(key) - 1;
 326                      tl >= key && *tl != '.';
 327                      tl--)
 328                         *tl = tolower(*tl);
 329                 for (tl = key; *tl && *tl != '.'; tl++)
 330                         *tl = tolower(*tl);
 331
 332                 key_regexp = (regex_t*)xmalloc(sizeof(regex_t));
 333                 if (regcomp(key_regexp, key, REG_EXTENDED)) {
 334                         error(_("invalid key pattern: %s"), key_);
 335                         FREE_AND_NULL(key_regexp);
 336                         ret = CONFIG_INVALID_PATTERN;
 337                         goto free_strings;
 338                 }
 339         } else {
 340                 if (git_config_parse_key(key_, &key, NULL)) {
 341                         ret = CONFIG_INVALID_KEY;
 342                         goto free_strings;
 343                 }
 344         }
 345
 346         if (regex_) {
 347                 if (regex_[0] == '!') {
 348                         do_not_match = 1;
 349                         regex_++;
 350                 }
 351
 352                 regexp = (regex_t*)xmalloc(sizeof(regex_t));
 353                 if (regcomp(regexp, regex_, REG_EXTENDED)) {
 354                         error(_("invalid pattern: %s"), regex_);
 355                         FREE_AND_NULL(regexp);
 356                         ret = CONFIG_INVALID_PATTERN;
 357                         goto free_strings;
 358                 }
 359         }
 360
 361         config_with_options(collect_config, &values,
 362                             &given_config_source, &config_options);
 363
 364         if (!values.nr && default_value) {
 365                 struct strbuf *item;
 366                 ALLOC_GROW(values.items, values.nr + 1, values.alloc);
 367                 item = &values.items[values.nr++];
 368                 strbuf_init(item, 0);
 369                 if (format_config(item, key_, default_value) < 0)
 370                         die(_("failed to format default config value: %s"),
 371                                 default_value);
 372         }
 373
 374         ret = !values.nr;
 375
 376         for (i = 0; i < values.nr; i++) {
 377                 struct strbuf *buf = values.items + i;
 378                 if (do_all || i == values.nr - 1)
 379                         fwrite(buf->buf, 1, buf->len, stdout);
 380                 strbuf_release(buf);
 381         }
 382         free(values.items);
 383
 384 free_strings:
 385         free(key);
 386         if (key_regexp) {
 387                 regfree(key_regexp);
 388                 free(key_regexp);
 389         }
 390         if (regexp) {
 391                 regfree(regexp);
 392                 free(regexp);
 393         }
 394
 395         return ret;
 396 }
 397
 398 static char *normalize_value(const char *key, const char *value)
 399 {
 400         if (!value)
 401                 return NULL;
 402
 403         if (type == 0 || type == TYPE_PATH || type == TYPE_EXPIRY_DATE)
 404                 /*
 405                  * We don't do normalization for TYPE_PATH here: If
 406                  * the path is like ~/foobar/, we prefer to store
 407                  * "~/foobar/" in the config file, and to expand the ~
 408                  * when retrieving the value.
 409                  * Also don't do normalization for expiry dates.
 410                  */
 411                 return xstrdup(value);
 412         if (type == TYPE_INT)
 413                 return xstrfmt("%"PRId64, git_config_int64(key, value));
 414         if (type == TYPE_BOOL)
 415                 return xstrdup(git_config_bool(key, value) ?  "true" : "false");
 416         if (type == TYPE_BOOL_OR_INT) {
 417                 int is_bool, v;
 418                 v = git_config_bool_or_int(key, value, &is_bool);
 419                 if (!is_bool)
 420                         return xstrfmt("%d", v);
 421                 else
 422                         return xstrdup(v ? "true" : "false");
 423         }
 424         if (type == TYPE_BOOL_OR_STR) {
 425                 int v = git_parse_maybe_bool(value);
 426                 if (v < 0)
 427                         return xstrdup(value);
 428                 else
 429                         return xstrdup(v ? "true" : "false");
 430         }
 431         if (type == TYPE_COLOR) {
 432                 char v[COLOR_MAXLEN];
 433                 if (git_config_color(v, key, value))
 434                         die(_("cannot parse color '%s'"), value);
 435
 436                 /*
 437                  * The contents of `v` now contain an ANSI escape
 438                  * sequence, not suitable for including within a
 439                  * configuration file. Treat the above as a
 440                  * "sanity-check", and return the given value, which we
 441                  * know is representable as valid color code.
 442                  */
 443                 return xstrdup(value);
 444         }
 445
 446         BUG("cannot normalize type %d", type);
 447 }
 448
 449 static int get_color_found;
 450 static const char *get_color_slot;
 451 static const char *get_colorbool_slot;
 452 static char parsed_color[COLOR_MAXLEN];
 453
 454 static int git_get_color_config(const char *var, const char *value, void *cb)
 455 {
 456         if (!strcmp(var, get_color_slot)) {
 457                 if (!value)
 458                         config_error_nonbool(var);
 459                 if (color_parse(value, parsed_color) < 0)
 460                         return -1;
 461                 get_color_found = 1;
 462         }
 463         return 0;
 464 }
 465
 466 static void get_color(const char *var, const char *def_color)
 467 {
 468         get_color_slot = var;
 469         get_color_found = 0;
 470         parsed_color[0] = '\0';
 471         config_with_options(git_get_color_config, NULL,
 472                             &given_config_source, &config_options);
 473
 474         if (!get_color_found && def_color) {
 475                 if (color_parse(def_color, parsed_color) < 0)
 476                         die(_("unable to parse default color value"));
 477         }
 478
 479         fputs(parsed_color, stdout);
 480 }
 481
 482 static int get_colorbool_found;
 483 static int get_diff_color_found;
 484 static int get_color_ui_found;
 485 static int git_get_colorbool_config(const char *var, const char *value,
 486                 void *cb)
 487 {
 488         if (!strcmp(var, get_colorbool_slot))
 489                 get_colorbool_found = git_config_colorbool(var, value);
 490         else if (!strcmp(var, "diff.color"))
 491                 get_diff_color_found = git_config_colorbool(var, value);
 492         else if (!strcmp(var, "color.ui"))
 493                 get_color_ui_found = git_config_colorbool(var, value);
 494         return 0;
 495 }
 496
 497 static int get_colorbool(const char *var, int print)
 498 {
 499         get_colorbool_slot = var;
 500         get_colorbool_found = -1;
 501         get_diff_color_found = -1;
 502         get_color_ui_found = -1;
 503         config_with_options(git_get_colorbool_config, NULL,
 504                             &given_config_source, &config_options);
 505
 506         if (get_colorbool_found < 0) {
 507                 if (!strcmp(get_colorbool_slot, "color.diff"))
 508                         get_colorbool_found = get_diff_color_found;
 509                 if (get_colorbool_found < 0)
 510                         get_colorbool_found = get_color_ui_found;
 511         }
 512
 513         if (get_colorbool_found < 0)
 514                 /* default value if none found in config */
 515                 get_colorbool_found = GIT_COLOR_AUTO;
 516
 517         get_colorbool_found = want_color(get_colorbool_found);
 518
 519         if (print) {
 520                 printf("%s\n", get_colorbool_found ? "true" : "false");
 521                 return 0;
 522         } else
 523                 return get_colorbool_found ? 0 : 1;
 524 }
 525
 526 static void check_write(void)
 527 {
 528         if (!given_config_source.file && !startup_info->have_repository)
 529                 die(_("not in a git directory"));
 530
 531         if (given_config_source.use_stdin)
 532                 die(_("writing to stdin is not supported"));
 533
 534         if (given_config_source.blob)
 535                 die(_("writing config blobs is not supported"));
 536 }
 537
 538 struct urlmatch_current_candidate_value {
 539         char value_is_null;
 540         struct strbuf value;
 541 };
 542
 543 static int urlmatch_collect_fn(const char *var, const char *value, void *cb)
 544 {
 545         struct string_list *values = cb;
 546         struct string_list_item *item = string_list_insert(values, var);
 547         struct urlmatch_current_candidate_value *matched = item->util;
 548
 549         if (!matched) {
 550                 matched = xmalloc(sizeof(*matched));
 551                 strbuf_init(&matched->value, 0);
 552                 item->util = matched;
 553         } else {
 554                 strbuf_reset(&matched->value);
 555         }
 556
 557         if (value) {
 558                 strbuf_addstr(&matched->value, value);
 559                 matched->value_is_null = 0;
 560         } else {
 561                 matched->value_is_null = 1;
 562         }
 563         return 0;
 564 }
 565
 566 static int get_urlmatch(const char *var, const char *url)
 567 {
 568         int ret;
 569         char *section_tail;
 570         struct string_list_item *item;
 571         struct urlmatch_config config = { STRING_LIST_INIT_DUP };
 572         struct string_list values = STRING_LIST_INIT_DUP;
 573
 574         config.collect_fn = urlmatch_collect_fn;
 575         config.cascade_fn = NULL;
 576         config.cb = &values;
 577
 578         if (!url_normalize(url, &config.url))
 579                 die("%s", config.url.err);
 580
 581         config.section = xstrdup_tolower(var);
 582         section_tail = strchr(config.section, '.');
 583         if (section_tail) {
 584                 *section_tail = '\0';
 585                 config.key = section_tail + 1;
 586                 show_keys = 0;
 587         } else {
 588                 config.key = NULL;
 589                 show_keys = 1;
 590         }
 591
 592         config_with_options(urlmatch_config_entry, &config,
 593                             &given_config_source, &config_options);
 594
 595         ret = !values.nr;
 596
 597         for_each_string_list_item(item, &values) {
 598                 struct urlmatch_current_candidate_value *matched = item->util;
 599                 struct strbuf buf = STRBUF_INIT;
 600
 601                 format_config(&buf, item->string,
 602                               matched->value_is_null ? NULL : matched->value.buf);
 603                 fwrite(buf.buf, 1, buf.len, stdout);
 604                 strbuf_release(&buf);
 605
 606                 strbuf_release(&matched->value);
 607         }
 608         string_list_clear(&config.vars, 1);
 609         string_list_clear(&values, 1);
 610         free(config.url.url);
 611
 612         free((void *)config.section);
 613         return ret;
 614 }
 615
 616 static char *default_user_config(void)
 617 {
 618         struct strbuf buf = STRBUF_INIT;
 619         strbuf_addf(&buf,
 620                     _("# This is Git's per-user configuration file.\n"
 621                       "[user]\n"
 622                       "# Please adapt and uncomment the following lines:\n"
 623                       "#        name = %s\n"
 624                       "#        email = %s\n"),
 625                     ident_default_name(),
 626                     ident_default_email());
 627         return strbuf_detach(&buf, NULL);
 628 }
 629
 630 int cmd_config(int argc, const char **argv, const char *prefix)
 631 {
 632         int nongit = !startup_info->have_repository;
 633         char *value;
 634
 635         given_config_source.file = xstrdup_or_null(getenv(CONFIG_ENVIRONMENT));
 636
 637         argc = parse_options(argc, argv, prefix, builtin_config_options,
 638                              builtin_config_usage,
 639                              PARSE_OPT_STOP_AT_NON_OPTION);
 640
 641         if (use_global_config + use_system_config + use_local_config +
 642             use_worktree_config +
 643             !!given_config_source.file + !!given_config_source.blob > 1) {
 644                 error(_("only one config file at a time"));
 645                 usage_builtin_config();
 646         }
 647
 648         if (nongit) {
 649                 if (use_local_config)
 650                         die(_("--local can only be used inside a git repository"));
 651                 if (given_config_source.blob)
 652                         die(_("--blob can only be used inside a git repository"));
 653                 if (use_worktree_config)
 654                         die(_("--worktree can only be used inside a git repository"));
 655
 656         }
 657
 658         if (given_config_source.file &&
 659                         !strcmp(given_config_source.file, "-")) {
 660                 given_config_source.file = NULL;
 661                 given_config_source.use_stdin = 1;
 662                 given_config_source.scope = CONFIG_SCOPE_COMMAND;
 663         }
 664
 665         if (use_global_config) {
 666                 char *user_config = expand_user_path("~/.gitconfig", 0);
 667                 char *xdg_config = xdg_config_home("config");
 668
 669                 if (!user_config)
 670                         /*
 671                          * It is unknown if HOME/.gitconfig exists, so
 672                          * we do not know if we should write to XDG
 673                          * location; error out even if XDG_CONFIG_HOME
 674                          * is set and points at a sane location.
 675                          */
 676                         die(_("$HOME not set"));
 677
 678                 given_config_source.scope = CONFIG_SCOPE_GLOBAL;
 679
 680                 if (access_or_warn(user_config, R_OK, 0) &&
 681                     xdg_config && !access_or_warn(xdg_config, R_OK, 0)) {
 682                         given_config_source.file = xdg_config;
 683                         free(user_config);
 684                 } else {
 685                         given_config_source.file = user_config;
 686                         free(xdg_config);
 687                 }
 688         }
 689         else if (use_system_config) {
 690                 given_config_source.file = git_etc_gitconfig();
 691                 given_config_source.scope = CONFIG_SCOPE_SYSTEM;
 692         } else if (use_local_config) {
 693                 given_config_source.file = git_pathdup("config");
 694                 given_config_source.scope = CONFIG_SCOPE_LOCAL;
 695         } else if (use_worktree_config) {
 696                 struct worktree **worktrees = get_worktrees();
 697                 if (repository_format_worktree_config)
 698                         given_config_source.file = git_pathdup("config.worktree");
 699                 else if (worktrees[0] && worktrees[1])
 700                         die(_("--worktree cannot be used with multiple "
 701                               "working trees unless the config\n"
 702                               "extension worktreeConfig is enabled. "
 703                               "Please read \"CONFIGURATION FILE\"\n"
 704                               "section in \"git help worktree\" for details"));
 705                 else
 706                         given_config_source.file = git_pathdup("config");
 707                 given_config_source.scope = CONFIG_SCOPE_LOCAL;
 708                 free_worktrees(worktrees);
 709         } else if (given_config_source.file) {
 710                 if (!is_absolute_path(given_config_source.file) && prefix)
 711                         given_config_source.file =
 712                                 prefix_filename(prefix, given_config_source.file);
 713                 given_config_source.scope = CONFIG_SCOPE_COMMAND;
 714         } else if (given_config_source.blob) {
 715                 given_config_source.scope = CONFIG_SCOPE_COMMAND;
 716         }
 717
 718
 719         if (respect_includes_opt == -1)
 720                 config_options.respect_includes = !given_config_source.file;
 721         else
 722                 config_options.respect_includes = respect_includes_opt;
 723         if (!nongit) {
 724                 config_options.commondir = get_git_common_dir();
 725                 config_options.git_dir = get_git_dir();
 726         }
 727
 728         if (end_nul) {
 729                 term = '\0';
 730                 delim = '\n';
 731                 key_delim = '\n';
 732         }
 733
 734         if ((actions & (ACTION_GET_COLOR|ACTION_GET_COLORBOOL)) && type) {
 735                 error(_("--get-color and variable type are incoherent"));
 736                 usage_builtin_config();
 737         }
 738
 739         if (HAS_MULTI_BITS(actions)) {
 740                 error(_("only one action at a time"));
 741                 usage_builtin_config();
 742         }
 743         if (actions == 0)
 744                 switch (argc) {
 745                 case 1: actions = ACTION_GET; break;
 746                 case 2: actions = ACTION_SET; break;
 747                 case 3: actions = ACTION_SET_ALL; break;
 748                 default:
 749                         usage_builtin_config();
 750                 }
 751         if (omit_values &&
 752             !(actions == ACTION_LIST || actions == ACTION_GET_REGEXP)) {
 753                 error(_("--name-only is only applicable to --list or --get-regexp"));
 754                 usage_builtin_config();
 755         }
 756
 757         if (show_origin && !(actions &
 758                 (ACTION_GET|ACTION_GET_ALL|ACTION_GET_REGEXP|ACTION_LIST))) {
 759                 error(_("--show-origin is only applicable to --get, --get-all, "
 760                         "--get-regexp, and --list"));
 761                 usage_builtin_config();
 762         }
 763
 764         if (default_value && !(actions & ACTION_GET)) {
 765                 error(_("--default is only applicable to --get"));
 766                 usage_builtin_config();
 767         }
 768
 769         if (actions & PAGING_ACTIONS)
 770                 setup_auto_pager("config", 1);
 771
 772         if (actions == ACTION_LIST) {
 773                 check_argc(argc, 0, 0);
 774                 if (config_with_options(show_all_config, NULL,
 775                                         &given_config_source,
 776                                         &config_options) < 0) {
 777                         if (given_config_source.file)
 778                                 die_errno(_("unable to read config file '%s'"),
 779                                           given_config_source.file);
 780                         else
 781                                 die(_("error processing config file(s)"));
 782                 }
 783         }
 784         else if (actions == ACTION_EDIT) {
 785                 char *config_file;
 786
 787                 check_argc(argc, 0, 0);
 788                 if (!given_config_source.file && nongit)
 789                         die(_("not in a git directory"));
 790                 if (given_config_source.use_stdin)
 791                         die(_("editing stdin is not supported"));
 792                 if (given_config_source.blob)
 793                         die(_("editing blobs is not supported"));
 794                 git_config(git_default_config, NULL);
 795                 config_file = given_config_source.file ?
 796                                 xstrdup(given_config_source.file) :
 797                                 git_pathdup("config");
 798                 if (use_global_config) {
 799                         int fd = open(config_file, O_CREAT | O_EXCL | O_WRONLY, 0666);
 800                         if (fd >= 0) {
 801                                 char *content = default_user_config();
 802                                 write_str_in_full(fd, content);
 803                                 free(content);
 804                                 close(fd);
 805                         }
 806                         else if (errno != EEXIST)
 807                                 die_errno(_("cannot create configuration file %s"), config_file);
 808                 }
 809                 launch_editor(config_file, NULL, NULL);
 810                 free(config_file);
 811         }
 812         else if (actions == ACTION_SET) {
 813                 int ret;
 814                 check_write();
 815                 check_argc(argc, 2, 2);
 816                 value = normalize_value(argv[0], argv[1]);
 817                 UNLEAK(value);
 818                 ret = git_config_set_in_file_gently(given_config_source.file, argv[0], value);
 819                 if (ret == CONFIG_NOTHING_SET)
 820                         error(_("cannot overwrite multiple values with a single value\n"
 821                         "       Use a regexp, --add or --replace-all to change %s."), argv[0]);
 822                 return ret;
 823         }
 824         else if (actions == ACTION_SET_ALL) {
 825                 check_write();
 826                 check_argc(argc, 2, 3);
 827                 value = normalize_value(argv[0], argv[1]);
 828                 UNLEAK(value);
 829                 return git_config_set_multivar_in_file_gently(given_config_source.file,
 830                                                               argv[0], value, argv[2], 0);
 831         }
 832         else if (actions == ACTION_ADD) {
 833                 check_write();
 834                 check_argc(argc, 2, 2);
 835                 value = normalize_value(argv[0], argv[1]);
 836                 UNLEAK(value);
 837                 return git_config_set_multivar_in_file_gently(given_config_source.file,
 838                                                               argv[0], value,
 839                                                               CONFIG_REGEX_NONE, 0);
 840         }
 841         else if (actions == ACTION_REPLACE_ALL) {
 842                 check_write();
 843                 check_argc(argc, 2, 3);
 844                 value = normalize_value(argv[0], argv[1]);
 845                 UNLEAK(value);
 846                 return git_config_set_multivar_in_file_gently(given_config_source.file,
 847                                                               argv[0], value, argv[2], 1);
 848         }
 849         else if (actions == ACTION_GET) {
 850                 check_argc(argc, 1, 2);
 851                 return get_value(argv[0], argv[1]);
 852         }
 853         else if (actions == ACTION_GET_ALL) {
 854                 do_all = 1;
 855                 check_argc(argc, 1, 2);
 856                 return get_value(argv[0], argv[1]);
 857         }
 858         else if (actions == ACTION_GET_REGEXP) {
 859                 show_keys = 1;
 860                 use_key_regexp = 1;
 861                 do_all = 1;
 862                 check_argc(argc, 1, 2);
 863                 return get_value(argv[0], argv[1]);
 864         }
 865         else if (actions == ACTION_GET_URLMATCH) {
 866                 check_argc(argc, 2, 2);
 867                 return get_urlmatch(argv[0], argv[1]);
 868         }
 869         else if (actions == ACTION_UNSET) {
 870                 check_write();
 871                 check_argc(argc, 1, 2);
 872                 if (argc == 2)
 873                         return git_config_set_multivar_in_file_gently(given_config_source.file,
 874                                                                       argv[0], NULL, argv[1], 0);
 875                 else
 876                         return git_config_set_in_file_gently(given_config_source.file,
 877                                                              argv[0], NULL);
 878         }
 879         else if (actions == ACTION_UNSET_ALL) {
 880                 check_write();
 881                 check_argc(argc, 1, 2);
 882                 return git_config_set_multivar_in_file_gently(given_config_source.file,
 883                                                               argv[0], NULL, argv[1], 1);
 884         }
 885         else if (actions == ACTION_RENAME_SECTION) {
 886                 int ret;
 887                 check_write();
 888                 check_argc(argc, 2, 2);
 889                 ret = git_config_rename_section_in_file(given_config_source.file,
 890                                                         argv[0], argv[1]);
 891                 if (ret < 0)
 892                         return ret;
 893                 if (ret == 0)
 894                         die(_("no such section: %s"), argv[0]);
 895         }
 896         else if (actions == ACTION_REMOVE_SECTION) {
 897                 int ret;
 898                 check_write();
 899                 check_argc(argc, 1, 1);
 900                 ret = git_config_rename_section_in_file(given_config_source.file,
 901                                                         argv[0], NULL);
 902                 if (ret < 0)
 903                         return ret;
 904                 if (ret == 0)
 905                         die(_("no such section: %s"), argv[0]);
 906         }
 907         else if (actions == ACTION_GET_COLOR) {
 908                 check_argc(argc, 1, 2);
 909                 get_color(argv[0], argv[1]);
 910         }
 911         else if (actions == ACTION_GET_COLORBOOL) {
 912                 check_argc(argc, 1, 2);
 913                 if (argc == 2)
 914                         color_stdout_is_tty = git_config_bool("command line", argv[1]);
 915                 return get_colorbool(argv[0], argc == 2);
 916         }
 917
 918         return 0;
 919 }