builtin/config.c

   1 #include "builtin.h"
   2 #include "abspath.h"
   3 #include "alloc.h"
   4 #include "config.h"
   5 #include "color.h"
   6 #include "environment.h"
   7 #include "gettext.h"
   8 #include "ident.h"
   9 #include "parse-options.h"
  10 #include "urlmatch.h"
  11 #include "quote.h"
  12 #include "setup.h"
  13 #include "worktree.h"
  14 #include "wrapper.h"
  15
  16 static const char *const builtin_config_usage[] = {
  17         N_("git config [<options>]"),
  18         NULL
  19 };
  20
  21 static char *key;
  22 static regex_t *key_regexp;
  23 static const char *value_pattern;
  24 static regex_t *regexp;
  25 static int show_keys;
  26 static int omit_values;
  27 static int use_key_regexp;
  28 static int do_all;
  29 static int do_not_match;
  30 static char delim = '=';
  31 static char key_delim = ' ';
  32 static char term = '\n';
  33
  34 static int use_global_config, use_system_config, use_local_config;
  35 static int use_worktree_config;
  36 static struct git_config_source given_config_source;
  37 static int actions, type;
  38 static char *default_value;
  39 static int end_nul;
  40 static int respect_includes_opt = -1;
  41 static struct config_options config_options;
  42 static int show_origin;
  43 static int show_scope;
  44 static int fixed_value;
  45
  46 #define ACTION_GET (1<<0)
  47 #define ACTION_GET_ALL (1<<1)
  48 #define ACTION_GET_REGEXP (1<<2)
  49 #define ACTION_REPLACE_ALL (1<<3)
  50 #define ACTION_ADD (1<<4)
  51 #define ACTION_UNSET (1<<5)
  52 #define ACTION_UNSET_ALL (1<<6)
  53 #define ACTION_RENAME_SECTION (1<<7)
  54 #define ACTION_REMOVE_SECTION (1<<8)
  55 #define ACTION_LIST (1<<9)
  56 #define ACTION_EDIT (1<<10)
  57 #define ACTION_SET (1<<11)
  58 #define ACTION_SET_ALL (1<<12)
  59 #define ACTION_GET_COLOR (1<<13)
  60 #define ACTION_GET_COLORBOOL (1<<14)
  61 #define ACTION_GET_URLMATCH (1<<15)
  62
  63 /*
  64  * The actions "ACTION_LIST | ACTION_GET_*" which may produce more than
  65  * one line of output and which should therefore be paged.
  66  */
  67 #define PAGING_ACTIONS (ACTION_LIST | ACTION_GET_ALL | \
  68                         ACTION_GET_REGEXP | ACTION_GET_URLMATCH)
  69
  70 #define TYPE_BOOL               1
  71 #define TYPE_INT                2
  72 #define TYPE_BOOL_OR_INT        3
  73 #define TYPE_PATH               4
  74 #define TYPE_EXPIRY_DATE        5
  75 #define TYPE_COLOR              6
  76 #define TYPE_BOOL_OR_STR        7
  77
  78 #define OPT_CALLBACK_VALUE(s, l, v, h, i) \
  79         { OPTION_CALLBACK, (s), (l), (v), NULL, (h), PARSE_OPT_NOARG | \
  80         PARSE_OPT_NONEG, option_parse_type, (i) }
  81
  82 static NORETURN void usage_builtin_config(void);
  83
  84 static int option_parse_type(const struct option *opt, const char *arg,
  85                              int unset)
  86 {
  87         int new_type, *to_type;
  88
  89         if (unset) {
  90                 *((int *) opt->value) = 0;
  91                 return 0;
  92         }
  93
  94         /*
  95          * To support '--<type>' style flags, begin with new_type equal to
  96          * opt->defval.
  97          */
  98         new_type = opt->defval;
  99         if (!new_type) {
 100                 if (!strcmp(arg, "bool"))
 101                         new_type = TYPE_BOOL;
 102                 else if (!strcmp(arg, "int"))
 103                         new_type = TYPE_INT;
 104                 else if (!strcmp(arg, "bool-or-int"))
 105                         new_type = TYPE_BOOL_OR_INT;
 106                 else if (!strcmp(arg, "bool-or-str"))
 107                         new_type = TYPE_BOOL_OR_STR;
 108                 else if (!strcmp(arg, "path"))
 109                         new_type = TYPE_PATH;
 110                 else if (!strcmp(arg, "expiry-date"))
 111                         new_type = TYPE_EXPIRY_DATE;
 112                 else if (!strcmp(arg, "color"))
 113                         new_type = TYPE_COLOR;
 114                 else
 115                         die(_("unrecognized --type argument, %s"), arg);
 116         }
 117
 118         to_type = opt->value;
 119         if (*to_type && *to_type != new_type) {
 120                 /*
 121                  * Complain when there is a new type not equal to the old type.
 122                  * This allows for combinations like '--int --type=int' and
 123                  * '--type=int --type=int', but disallows ones like '--type=bool
 124                  * --int' and '--type=bool
 125                  * --type=int'.
 126                  */
 127                 error(_("only one type at a time"));
 128                 usage_builtin_config();
 129         }
 130         *to_type = new_type;
 131
 132         return 0;
 133 }
 134
 135 static struct option builtin_config_options[] = {
 136         OPT_GROUP(N_("Config file location")),
 137         OPT_BOOL(0, "global", &use_global_config, N_("use global config file")),
 138         OPT_BOOL(0, "system", &use_system_config, N_("use system config file")),
 139         OPT_BOOL(0, "local", &use_local_config, N_("use repository config file")),
 140         OPT_BOOL(0, "worktree", &use_worktree_config, N_("use per-worktree config file")),
 141         OPT_STRING('f', "file", &given_config_source.file, N_("file"), N_("use given config file")),
 142         OPT_STRING(0, "blob", &given_config_source.blob, N_("blob-id"), N_("read config from given blob object")),
 143         OPT_GROUP(N_("Action")),
 144         OPT_BIT(0, "get", &actions, N_("get value: name [value-pattern]"), ACTION_GET),
 145         OPT_BIT(0, "get-all", &actions, N_("get all values: key [value-pattern]"), ACTION_GET_ALL),
 146         OPT_BIT(0, "get-regexp", &actions, N_("get values for regexp: name-regex [value-pattern]"), ACTION_GET_REGEXP),
 147         OPT_BIT(0, "get-urlmatch", &actions, N_("get value specific for the URL: section[.var] URL"), ACTION_GET_URLMATCH),
 148         OPT_BIT(0, "replace-all", &actions, N_("replace all matching variables: name value [value-pattern]"), ACTION_REPLACE_ALL),
 149         OPT_BIT(0, "add", &actions, N_("add a new variable: name value"), ACTION_ADD),
 150         OPT_BIT(0, "unset", &actions, N_("remove a variable: name [value-pattern]"), ACTION_UNSET),
 151         OPT_BIT(0, "unset-all", &actions, N_("remove all matches: name [value-pattern]"), ACTION_UNSET_ALL),
 152         OPT_BIT(0, "rename-section", &actions, N_("rename section: old-name new-name"), ACTION_RENAME_SECTION),
 153         OPT_BIT(0, "remove-section", &actions, N_("remove a section: name"), ACTION_REMOVE_SECTION),
 154         OPT_BIT('l', "list", &actions, N_("list all"), ACTION_LIST),
 155         OPT_BOOL(0, "fixed-value", &fixed_value, N_("use string equality when comparing values to 'value-pattern'")),
 156         OPT_BIT('e', "edit", &actions, N_("open an editor"), ACTION_EDIT),
 157         OPT_BIT(0, "get-color", &actions, N_("find the color configured: slot [default]"), ACTION_GET_COLOR),
 158         OPT_BIT(0, "get-colorbool", &actions, N_("find the color setting: slot [stdout-is-tty]"), ACTION_GET_COLORBOOL),
 159         OPT_GROUP(N_("Type")),
 160         OPT_CALLBACK('t', "type", &type, N_("type"), N_("value is given this type"), option_parse_type),
 161         OPT_CALLBACK_VALUE(0, "bool", &type, N_("value is \"true\" or \"false\""), TYPE_BOOL),
 162         OPT_CALLBACK_VALUE(0, "int", &type, N_("value is decimal number"), TYPE_INT),
 163         OPT_CALLBACK_VALUE(0, "bool-or-int", &type, N_("value is --bool or --int"), TYPE_BOOL_OR_INT),
 164         OPT_CALLBACK_VALUE(0, "bool-or-str", &type, N_("value is --bool or string"), TYPE_BOOL_OR_STR),
 165         OPT_CALLBACK_VALUE(0, "path", &type, N_("value is a path (file or directory name)"), TYPE_PATH),
 166         OPT_CALLBACK_VALUE(0, "expiry-date", &type, N_("value is an expiry date"), TYPE_EXPIRY_DATE),
 167         OPT_GROUP(N_("Other")),
 168         OPT_BOOL('z', "null", &end_nul, N_("terminate values with NUL byte")),
 169         OPT_BOOL(0, "name-only", &omit_values, N_("show variable names only")),
 170         OPT_BOOL(0, "includes", &respect_includes_opt, N_("respect include directives on lookup")),
 171         OPT_BOOL(0, "show-origin", &show_origin, N_("show origin of config (file, standard input, blob, command line)")),
 172         OPT_BOOL(0, "show-scope", &show_scope, N_("show scope of config (worktree, local, global, system, command)")),
 173         OPT_STRING(0, "default", &default_value, N_("value"), N_("with --get, use default value when missing entry")),
 174         OPT_END(),
 175 };
 176
 177 static NORETURN void usage_builtin_config(void)
 178 {
 179         usage_with_options(builtin_config_usage, builtin_config_options);
 180 }
 181
 182 static void check_argc(int argc, int min, int max)
 183 {
 184         if (argc >= min && argc <= max)
 185                 return;
 186         if (min == max)
 187                 error(_("wrong number of arguments, should be %d"), min);
 188         else
 189                 error(_("wrong number of arguments, should be from %d to %d"),
 190                       min, max);
 191         usage_builtin_config();
 192 }
 193
 194 static void show_config_origin(struct strbuf *buf)
 195 {
 196         const char term = end_nul ? '\0' : '\t';
 197
 198         strbuf_addstr(buf, current_config_origin_type());
 199         strbuf_addch(buf, ':');
 200         if (end_nul)
 201                 strbuf_addstr(buf, current_config_name());
 202         else
 203                 quote_c_style(current_config_name(), buf, NULL, 0);
 204         strbuf_addch(buf, term);
 205 }
 206
 207 static void show_config_scope(struct strbuf *buf)
 208 {
 209         const char term = end_nul ? '\0' : '\t';
 210         const char *scope = config_scope_name(current_config_scope());
 211
 212         strbuf_addstr(buf, N_(scope));
 213         strbuf_addch(buf, term);
 214 }
 215
 216 static int show_all_config(const char *key_, const char *value_,
 217                            void *cb UNUSED)
 218 {
 219         if (show_origin || show_scope) {
 220                 struct strbuf buf = STRBUF_INIT;
 221                 if (show_scope)
 222                         show_config_scope(&buf);
 223                 if (show_origin)
 224                         show_config_origin(&buf);
 225                 /* Use fwrite as "buf" can contain \0's if "end_null" is set. */
 226                 fwrite(buf.buf, 1, buf.len, stdout);
 227                 strbuf_release(&buf);
 228         }
 229         if (!omit_values && value_)
 230                 printf("%s%c%s%c", key_, delim, value_, term);
 231         else
 232                 printf("%s%c", key_, term);
 233         return 0;
 234 }
 235
 236 struct strbuf_list {
 237         struct strbuf *items;
 238         int nr;
 239         int alloc;
 240 };
 241
 242 static int format_config(struct strbuf *buf, const char *key_, const char *value_)
 243 {
 244         if (show_scope)
 245                 show_config_scope(buf);
 246         if (show_origin)
 247                 show_config_origin(buf);
 248         if (show_keys)
 249                 strbuf_addstr(buf, key_);
 250         if (!omit_values) {
 251                 if (show_keys)
 252                         strbuf_addch(buf, key_delim);
 253
 254                 if (type == TYPE_INT)
 255                         strbuf_addf(buf, "%"PRId64,
 256                                     git_config_int64(key_, value_ ? value_ : ""));
 257                 else if (type == TYPE_BOOL)
 258                         strbuf_addstr(buf, git_config_bool(key_, value_) ?
 259                                       "true" : "false");
 260                 else if (type == TYPE_BOOL_OR_INT) {
 261                         int is_bool, v;
 262                         v = git_config_bool_or_int(key_, value_, &is_bool);
 263                         if (is_bool)
 264                                 strbuf_addstr(buf, v ? "true" : "false");
 265                         else
 266                                 strbuf_addf(buf, "%d", v);
 267                 } else if (type == TYPE_BOOL_OR_STR) {
 268                         int v = git_parse_maybe_bool(value_);
 269                         if (v < 0)
 270                                 strbuf_addstr(buf, value_);
 271                         else
 272                                 strbuf_addstr(buf, v ? "true" : "false");
 273                 } else if (type == TYPE_PATH) {
 274                         const char *v;
 275                         if (git_config_pathname(&v, key_, value_) < 0)
 276                                 return -1;
 277                         strbuf_addstr(buf, v);
 278                         free((char *)v);
 279                 } else if (type == TYPE_EXPIRY_DATE) {
 280                         timestamp_t t;
 281                         if (git_config_expiry_date(&t, key_, value_) < 0)
 282                                 return -1;
 283                         strbuf_addf(buf, "%"PRItime, t);
 284                 } else if (type == TYPE_COLOR) {
 285                         char v[COLOR_MAXLEN];
 286                         if (git_config_color(v, key_, value_) < 0)
 287                                 return -1;
 288                         strbuf_addstr(buf, v);
 289                 } else if (value_) {
 290                         strbuf_addstr(buf, value_);
 291                 } else {
 292                         /* Just show the key name; back out delimiter */
 293                         if (show_keys)
 294                                 strbuf_setlen(buf, buf->len - 1);
 295                 }
 296         }
 297         strbuf_addch(buf, term);
 298         return 0;
 299 }
 300
 301 static int collect_config(const char *key_, const char *value_, void *cb)
 302 {
 303         struct strbuf_list *values = cb;
 304
 305         if (!use_key_regexp && strcmp(key_, key))
 306                 return 0;
 307         if (use_key_regexp && regexec(key_regexp, key_, 0, NULL, 0))
 308                 return 0;
 309         if (fixed_value && strcmp(value_pattern, (value_?value_:"")))
 310                 return 0;
 311         if (regexp != NULL &&
 312             (do_not_match ^ !!regexec(regexp, (value_?value_:""), 0, NULL, 0)))
 313                 return 0;
 314
 315         ALLOC_GROW(values->items, values->nr + 1, values->alloc);
 316         strbuf_init(&values->items[values->nr], 0);
 317
 318         return format_config(&values->items[values->nr++], key_, value_);
 319 }
 320
 321 static int get_value(const char *key_, const char *regex_, unsigned flags)
 322 {
 323         int ret = CONFIG_GENERIC_ERROR;
 324         struct strbuf_list values = {NULL};
 325         int i;
 326
 327         if (use_key_regexp) {
 328                 char *tl;
 329
 330                 /*
 331                  * NEEDSWORK: this naive pattern lowercasing obviously does not
 332                  * work for more complex patterns like "^[^.]*Foo.*bar".
 333                  * Perhaps we should deprecate this altogether someday.
 334                  */
 335
 336                 key = xstrdup(key_);
 337                 for (tl = key + strlen(key) - 1;
 338                      tl >= key && *tl != '.';
 339                      tl--)
 340                         *tl = tolower(*tl);
 341                 for (tl = key; *tl && *tl != '.'; tl++)
 342                         *tl = tolower(*tl);
 343
 344                 key_regexp = (regex_t*)xmalloc(sizeof(regex_t));
 345                 if (regcomp(key_regexp, key, REG_EXTENDED)) {
 346                         error(_("invalid key pattern: %s"), key_);
 347                         FREE_AND_NULL(key_regexp);
 348                         ret = CONFIG_INVALID_PATTERN;
 349                         goto free_strings;
 350                 }
 351         } else {
 352                 if (git_config_parse_key(key_, &key, NULL)) {
 353                         ret = CONFIG_INVALID_KEY;
 354                         goto free_strings;
 355                 }
 356         }
 357
 358         if (regex_ && (flags & CONFIG_FLAGS_FIXED_VALUE))
 359                 value_pattern = regex_;
 360         else if (regex_) {
 361                 if (regex_[0] == '!') {
 362                         do_not_match = 1;
 363                         regex_++;
 364                 }
 365
 366                 regexp = (regex_t*)xmalloc(sizeof(regex_t));
 367                 if (regcomp(regexp, regex_, REG_EXTENDED)) {
 368                         error(_("invalid pattern: %s"), regex_);
 369                         FREE_AND_NULL(regexp);
 370                         ret = CONFIG_INVALID_PATTERN;
 371                         goto free_strings;
 372                 }
 373         }
 374
 375         config_with_options(collect_config, &values,
 376                             &given_config_source, &config_options);
 377
 378         if (!values.nr && default_value) {
 379                 struct strbuf *item;
 380                 ALLOC_GROW(values.items, values.nr + 1, values.alloc);
 381                 item = &values.items[values.nr++];
 382                 strbuf_init(item, 0);
 383                 if (format_config(item, key_, default_value) < 0)
 384                         die(_("failed to format default config value: %s"),
 385                                 default_value);
 386         }
 387
 388         ret = !values.nr;
 389
 390         for (i = 0; i < values.nr; i++) {
 391                 struct strbuf *buf = values.items + i;
 392                 if (do_all || i == values.nr - 1)
 393                         fwrite(buf->buf, 1, buf->len, stdout);
 394                 strbuf_release(buf);
 395         }
 396         free(values.items);
 397
 398 free_strings:
 399         free(key);
 400         if (key_regexp) {
 401                 regfree(key_regexp);
 402                 free(key_regexp);
 403         }
 404         if (regexp) {
 405                 regfree(regexp);
 406                 free(regexp);
 407         }
 408
 409         return ret;
 410 }
 411
 412 static char *normalize_value(const char *key, const char *value)
 413 {
 414         if (!value)
 415                 return NULL;
 416
 417         if (type == 0 || type == TYPE_PATH || type == TYPE_EXPIRY_DATE)
 418                 /*
 419                  * We don't do normalization for TYPE_PATH here: If
 420                  * the path is like ~/foobar/, we prefer to store
 421                  * "~/foobar/" in the config file, and to expand the ~
 422                  * when retrieving the value.
 423                  * Also don't do normalization for expiry dates.
 424                  */
 425                 return xstrdup(value);
 426         if (type == TYPE_INT)
 427                 return xstrfmt("%"PRId64, git_config_int64(key, value));
 428         if (type == TYPE_BOOL)
 429                 return xstrdup(git_config_bool(key, value) ?  "true" : "false");
 430         if (type == TYPE_BOOL_OR_INT) {
 431                 int is_bool, v;
 432                 v = git_config_bool_or_int(key, value, &is_bool);
 433                 if (!is_bool)
 434                         return xstrfmt("%d", v);
 435                 else
 436                         return xstrdup(v ? "true" : "false");
 437         }
 438         if (type == TYPE_BOOL_OR_STR) {
 439                 int v = git_parse_maybe_bool(value);
 440                 if (v < 0)
 441                         return xstrdup(value);
 442                 else
 443                         return xstrdup(v ? "true" : "false");
 444         }
 445         if (type == TYPE_COLOR) {
 446                 char v[COLOR_MAXLEN];
 447                 if (git_config_color(v, key, value))
 448                         die(_("cannot parse color '%s'"), value);
 449
 450                 /*
 451                  * The contents of `v` now contain an ANSI escape
 452                  * sequence, not suitable for including within a
 453                  * configuration file. Treat the above as a
 454                  * "sanity-check", and return the given value, which we
 455                  * know is representable as valid color code.
 456                  */
 457                 return xstrdup(value);
 458         }
 459
 460         BUG("cannot normalize type %d", type);
 461 }
 462
 463 static int get_color_found;
 464 static const char *get_color_slot;
 465 static const char *get_colorbool_slot;
 466 static char parsed_color[COLOR_MAXLEN];
 467
 468 static int git_get_color_config(const char *var, const char *value,
 469                                 void *cb UNUSED)
 470 {
 471         if (!strcmp(var, get_color_slot)) {
 472                 if (!value)
 473                         config_error_nonbool(var);
 474                 if (color_parse(value, parsed_color) < 0)
 475                         return -1;
 476                 get_color_found = 1;
 477         }
 478         return 0;
 479 }
 480
 481 static void get_color(const char *var, const char *def_color)
 482 {
 483         get_color_slot = var;
 484         get_color_found = 0;
 485         parsed_color[0] = '\0';
 486         config_with_options(git_get_color_config, NULL,
 487                             &given_config_source, &config_options);
 488
 489         if (!get_color_found && def_color) {
 490                 if (color_parse(def_color, parsed_color) < 0)
 491                         die(_("unable to parse default color value"));
 492         }
 493
 494         fputs(parsed_color, stdout);
 495 }
 496
 497 static int get_colorbool_found;
 498 static int get_diff_color_found;
 499 static int get_color_ui_found;
 500 static int git_get_colorbool_config(const char *var, const char *value,
 501                                     void *data UNUSED)
 502 {
 503         if (!strcmp(var, get_colorbool_slot))
 504                 get_colorbool_found = git_config_colorbool(var, value);
 505         else if (!strcmp(var, "diff.color"))
 506                 get_diff_color_found = git_config_colorbool(var, value);
 507         else if (!strcmp(var, "color.ui"))
 508                 get_color_ui_found = git_config_colorbool(var, value);
 509         return 0;
 510 }
 511
 512 static int get_colorbool(const char *var, int print)
 513 {
 514         get_colorbool_slot = var;
 515         get_colorbool_found = -1;
 516         get_diff_color_found = -1;
 517         get_color_ui_found = -1;
 518         config_with_options(git_get_colorbool_config, NULL,
 519                             &given_config_source, &config_options);
 520
 521         if (get_colorbool_found < 0) {
 522                 if (!strcmp(get_colorbool_slot, "color.diff"))
 523                         get_colorbool_found = get_diff_color_found;
 524                 if (get_colorbool_found < 0)
 525                         get_colorbool_found = get_color_ui_found;
 526         }
 527
 528         if (get_colorbool_found < 0)
 529                 /* default value if none found in config */
 530                 get_colorbool_found = GIT_COLOR_AUTO;
 531
 532         get_colorbool_found = want_color(get_colorbool_found);
 533
 534         if (print) {
 535                 printf("%s\n", get_colorbool_found ? "true" : "false");
 536                 return 0;
 537         } else
 538                 return get_colorbool_found ? 0 : 1;
 539 }
 540
 541 static void check_write(void)
 542 {
 543         if (!given_config_source.file && !startup_info->have_repository)
 544                 die(_("not in a git directory"));
 545
 546         if (given_config_source.use_stdin)
 547                 die(_("writing to stdin is not supported"));
 548
 549         if (given_config_source.blob)
 550                 die(_("writing config blobs is not supported"));
 551 }
 552
 553 struct urlmatch_current_candidate_value {
 554         char value_is_null;
 555         struct strbuf value;
 556 };
 557
 558 static int urlmatch_collect_fn(const char *var, const char *value, void *cb)
 559 {
 560         struct string_list *values = cb;
 561         struct string_list_item *item = string_list_insert(values, var);
 562         struct urlmatch_current_candidate_value *matched = item->util;
 563
 564         if (!matched) {
 565                 matched = xmalloc(sizeof(*matched));
 566                 strbuf_init(&matched->value, 0);
 567                 item->util = matched;
 568         } else {
 569                 strbuf_reset(&matched->value);
 570         }
 571
 572         if (value) {
 573                 strbuf_addstr(&matched->value, value);
 574                 matched->value_is_null = 0;
 575         } else {
 576                 matched->value_is_null = 1;
 577         }
 578         return 0;
 579 }
 580
 581 static int get_urlmatch(const char *var, const char *url)
 582 {
 583         int ret;
 584         char *section_tail;
 585         struct string_list_item *item;
 586         struct urlmatch_config config = URLMATCH_CONFIG_INIT;
 587         struct string_list values = STRING_LIST_INIT_DUP;
 588
 589         config.collect_fn = urlmatch_collect_fn;
 590         config.cascade_fn = NULL;
 591         config.cb = &values;
 592
 593         if (!url_normalize(url, &config.url))
 594                 die("%s", config.url.err);
 595
 596         config.section = xstrdup_tolower(var);
 597         section_tail = strchr(config.section, '.');
 598         if (section_tail) {
 599                 *section_tail = '\0';
 600                 config.key = section_tail + 1;
 601                 show_keys = 0;
 602         } else {
 603                 config.key = NULL;
 604                 show_keys = 1;
 605         }
 606
 607         config_with_options(urlmatch_config_entry, &config,
 608                             &given_config_source, &config_options);
 609
 610         ret = !values.nr;
 611
 612         for_each_string_list_item(item, &values) {
 613                 struct urlmatch_current_candidate_value *matched = item->util;
 614                 struct strbuf buf = STRBUF_INIT;
 615
 616                 format_config(&buf, item->string,
 617                               matched->value_is_null ? NULL : matched->value.buf);
 618                 fwrite(buf.buf, 1, buf.len, stdout);
 619                 strbuf_release(&buf);
 620
 621                 strbuf_release(&matched->value);
 622         }
 623         urlmatch_config_release(&config);
 624         string_list_clear(&values, 1);
 625         free(config.url.url);
 626
 627         free((void *)config.section);
 628         return ret;
 629 }
 630
 631 static char *default_user_config(void)
 632 {
 633         struct strbuf buf = STRBUF_INIT;
 634         strbuf_addf(&buf,
 635                     _("# This is Git's per-user configuration file.\n"
 636                       "[user]\n"
 637                       "# Please adapt and uncomment the following lines:\n"
 638                       "#        name = %s\n"
 639                       "#        email = %s\n"),
 640                     ident_default_name(),
 641                     ident_default_email());
 642         return strbuf_detach(&buf, NULL);
 643 }
 644
 645 int cmd_config(int argc, const char **argv, const char *prefix)
 646 {
 647         int nongit = !startup_info->have_repository;
 648         char *value = NULL;
 649         int flags = 0;
 650         int ret = 0;
 651
 652         given_config_source.file = xstrdup_or_null(getenv(CONFIG_ENVIRONMENT));
 653
 654         argc = parse_options(argc, argv, prefix, builtin_config_options,
 655                              builtin_config_usage,
 656                              PARSE_OPT_STOP_AT_NON_OPTION);
 657
 658         if (use_global_config + use_system_config + use_local_config +
 659             use_worktree_config +
 660             !!given_config_source.file + !!given_config_source.blob > 1) {
 661                 error(_("only one config file at a time"));
 662                 usage_builtin_config();
 663         }
 664
 665         if (nongit) {
 666                 if (use_local_config)
 667                         die(_("--local can only be used inside a git repository"));
 668                 if (given_config_source.blob)
 669                         die(_("--blob can only be used inside a git repository"));
 670                 if (use_worktree_config)
 671                         die(_("--worktree can only be used inside a git repository"));
 672
 673         }
 674
 675         if (given_config_source.file &&
 676                         !strcmp(given_config_source.file, "-")) {
 677                 given_config_source.file = NULL;
 678                 given_config_source.use_stdin = 1;
 679                 given_config_source.scope = CONFIG_SCOPE_COMMAND;
 680         }
 681
 682         if (use_global_config) {
 683                 char *user_config, *xdg_config;
 684
 685                 git_global_config(&user_config, &xdg_config);
 686                 if (!user_config)
 687                         /*
 688                          * It is unknown if HOME/.gitconfig exists, so
 689                          * we do not know if we should write to XDG
 690                          * location; error out even if XDG_CONFIG_HOME
 691                          * is set and points at a sane location.
 692                          */
 693                         die(_("$HOME not set"));
 694
 695                 given_config_source.scope = CONFIG_SCOPE_GLOBAL;
 696
 697                 if (access_or_warn(user_config, R_OK, 0) &&
 698                     xdg_config && !access_or_warn(xdg_config, R_OK, 0)) {
 699                         given_config_source.file = xdg_config;
 700                         free(user_config);
 701                 } else {
 702                         given_config_source.file = user_config;
 703                         free(xdg_config);
 704                 }
 705         }
 706         else if (use_system_config) {
 707                 given_config_source.file = git_system_config();
 708                 given_config_source.scope = CONFIG_SCOPE_SYSTEM;
 709         } else if (use_local_config) {
 710                 given_config_source.file = git_pathdup("config");
 711                 given_config_source.scope = CONFIG_SCOPE_LOCAL;
 712         } else if (use_worktree_config) {
 713                 struct worktree **worktrees = get_worktrees();
 714                 if (repository_format_worktree_config)
 715                         given_config_source.file = git_pathdup("config.worktree");
 716                 else if (worktrees[0] && worktrees[1])
 717                         die(_("--worktree cannot be used with multiple "
 718                               "working trees unless the config\n"
 719                               "extension worktreeConfig is enabled. "
 720                               "Please read \"CONFIGURATION FILE\"\n"
 721                               "section in \"git help worktree\" for details"));
 722                 else
 723                         given_config_source.file = git_pathdup("config");
 724                 given_config_source.scope = CONFIG_SCOPE_LOCAL;
 725                 free_worktrees(worktrees);
 726         } else if (given_config_source.file) {
 727                 if (!is_absolute_path(given_config_source.file) && prefix)
 728                         given_config_source.file =
 729                                 prefix_filename(prefix, given_config_source.file);
 730                 given_config_source.scope = CONFIG_SCOPE_COMMAND;
 731         } else if (given_config_source.blob) {
 732                 given_config_source.scope = CONFIG_SCOPE_COMMAND;
 733         }
 734
 735
 736         if (respect_includes_opt == -1)
 737                 config_options.respect_includes = !given_config_source.file;
 738         else
 739                 config_options.respect_includes = respect_includes_opt;
 740         if (!nongit) {
 741                 config_options.commondir = get_git_common_dir();
 742                 config_options.git_dir = get_git_dir();
 743         }
 744
 745         if (end_nul) {
 746                 term = '\0';
 747                 delim = '\n';
 748                 key_delim = '\n';
 749         }
 750
 751         if ((actions & (ACTION_GET_COLOR|ACTION_GET_COLORBOOL)) && type) {
 752                 error(_("--get-color and variable type are incoherent"));
 753                 usage_builtin_config();
 754         }
 755
 756         if (HAS_MULTI_BITS(actions)) {
 757                 error(_("only one action at a time"));
 758                 usage_builtin_config();
 759         }
 760         if (actions == 0)
 761                 switch (argc) {
 762                 case 1: actions = ACTION_GET; break;
 763                 case 2: actions = ACTION_SET; break;
 764                 case 3: actions = ACTION_SET_ALL; break;
 765                 default:
 766                         usage_builtin_config();
 767                 }
 768         if (omit_values &&
 769             !(actions == ACTION_LIST || actions == ACTION_GET_REGEXP)) {
 770                 error(_("--name-only is only applicable to --list or --get-regexp"));
 771                 usage_builtin_config();
 772         }
 773
 774         if (show_origin && !(actions &
 775                 (ACTION_GET|ACTION_GET_ALL|ACTION_GET_REGEXP|ACTION_LIST))) {
 776                 error(_("--show-origin is only applicable to --get, --get-all, "
 777                         "--get-regexp, and --list"));
 778                 usage_builtin_config();
 779         }
 780
 781         if (default_value && !(actions & ACTION_GET)) {
 782                 error(_("--default is only applicable to --get"));
 783                 usage_builtin_config();
 784         }
 785
 786         /* check usage of --fixed-value */
 787         if (fixed_value) {
 788                 int allowed_usage = 0;
 789
 790                 switch (actions) {
 791                 /* git config --get <name> <value-pattern> */
 792                 case ACTION_GET:
 793                 /* git config --get-all <name> <value-pattern> */
 794                 case ACTION_GET_ALL:
 795                 /* git config --get-regexp <name-pattern> <value-pattern> */
 796                 case ACTION_GET_REGEXP:
 797                 /* git config --unset <name> <value-pattern> */
 798                 case ACTION_UNSET:
 799                 /* git config --unset-all <name> <value-pattern> */
 800                 case ACTION_UNSET_ALL:
 801                         allowed_usage = argc > 1 && !!argv[1];
 802                         break;
 803
 804                 /* git config <name> <value> <value-pattern> */
 805                 case ACTION_SET_ALL:
 806                 /* git config --replace-all <name> <value> <value-pattern> */
 807                 case ACTION_REPLACE_ALL:
 808                         allowed_usage = argc > 2 && !!argv[2];
 809                         break;
 810
 811                 /* other options don't allow --fixed-value */
 812                 }
 813
 814                 if (!allowed_usage) {
 815                         error(_("--fixed-value only applies with 'value-pattern'"));
 816                         usage_builtin_config();
 817                 }
 818
 819                 flags |= CONFIG_FLAGS_FIXED_VALUE;
 820         }
 821
 822         if (actions & PAGING_ACTIONS)
 823                 setup_auto_pager("config", 1);
 824
 825         if (actions == ACTION_LIST) {
 826                 check_argc(argc, 0, 0);
 827                 if (config_with_options(show_all_config, NULL,
 828                                         &given_config_source,
 829                                         &config_options) < 0) {
 830                         if (given_config_source.file)
 831                                 die_errno(_("unable to read config file '%s'"),
 832                                           given_config_source.file);
 833                         else
 834                                 die(_("error processing config file(s)"));
 835                 }
 836         }
 837         else if (actions == ACTION_EDIT) {
 838                 char *config_file;
 839
 840                 check_argc(argc, 0, 0);
 841                 if (!given_config_source.file && nongit)
 842                         die(_("not in a git directory"));
 843                 if (given_config_source.use_stdin)
 844                         die(_("editing stdin is not supported"));
 845                 if (given_config_source.blob)
 846                         die(_("editing blobs is not supported"));
 847                 git_config(git_default_config, NULL);
 848                 config_file = given_config_source.file ?
 849                                 xstrdup(given_config_source.file) :
 850                                 git_pathdup("config");
 851                 if (use_global_config) {
 852                         int fd = open(config_file, O_CREAT | O_EXCL | O_WRONLY, 0666);
 853                         if (fd >= 0) {
 854                                 char *content = default_user_config();
 855                                 write_str_in_full(fd, content);
 856                                 free(content);
 857                                 close(fd);
 858                         }
 859                         else if (errno != EEXIST)
 860                                 die_errno(_("cannot create configuration file %s"), config_file);
 861                 }
 862                 launch_editor(config_file, NULL, NULL);
 863                 free(config_file);
 864         }
 865         else if (actions == ACTION_SET) {
 866                 check_write();
 867                 check_argc(argc, 2, 2);
 868                 value = normalize_value(argv[0], argv[1]);
 869                 ret = git_config_set_in_file_gently(given_config_source.file, argv[0], value);
 870                 if (ret == CONFIG_NOTHING_SET)
 871                         error(_("cannot overwrite multiple values with a single value\n"
 872                         "       Use a regexp, --add or --replace-all to change %s."), argv[0]);
 873         }
 874         else if (actions == ACTION_SET_ALL) {
 875                 check_write();
 876                 check_argc(argc, 2, 3);
 877                 value = normalize_value(argv[0], argv[1]);
 878                 ret = git_config_set_multivar_in_file_gently(given_config_source.file,
 879                                                              argv[0], value, argv[2],
 880                                                              flags);
 881         }
 882         else if (actions == ACTION_ADD) {
 883                 check_write();
 884                 check_argc(argc, 2, 2);
 885                 value = normalize_value(argv[0], argv[1]);
 886                 ret = git_config_set_multivar_in_file_gently(given_config_source.file,
 887                                                              argv[0], value,
 888                                                              CONFIG_REGEX_NONE,
 889                                                              flags);
 890         }
 891         else if (actions == ACTION_REPLACE_ALL) {
 892                 check_write();
 893                 check_argc(argc, 2, 3);
 894                 value = normalize_value(argv[0], argv[1]);
 895                 ret = git_config_set_multivar_in_file_gently(given_config_source.file,
 896                                                              argv[0], value, argv[2],
 897                                                              flags | CONFIG_FLAGS_MULTI_REPLACE);
 898         }
 899         else if (actions == ACTION_GET) {
 900                 check_argc(argc, 1, 2);
 901                 return get_value(argv[0], argv[1], flags);
 902         }
 903         else if (actions == ACTION_GET_ALL) {
 904                 do_all = 1;
 905                 check_argc(argc, 1, 2);
 906                 return get_value(argv[0], argv[1], flags);
 907         }
 908         else if (actions == ACTION_GET_REGEXP) {
 909                 show_keys = 1;
 910                 use_key_regexp = 1;
 911                 do_all = 1;
 912                 check_argc(argc, 1, 2);
 913                 return get_value(argv[0], argv[1], flags);
 914         }
 915         else if (actions == ACTION_GET_URLMATCH) {
 916                 check_argc(argc, 2, 2);
 917                 return get_urlmatch(argv[0], argv[1]);
 918         }
 919         else if (actions == ACTION_UNSET) {
 920                 check_write();
 921                 check_argc(argc, 1, 2);
 922                 if (argc == 2)
 923                         return git_config_set_multivar_in_file_gently(given_config_source.file,
 924                                                                       argv[0], NULL, argv[1],
 925                                                                       flags);
 926                 else
 927                         return git_config_set_in_file_gently(given_config_source.file,
 928                                                              argv[0], NULL);
 929         }
 930         else if (actions == ACTION_UNSET_ALL) {
 931                 check_write();
 932                 check_argc(argc, 1, 2);
 933                 return git_config_set_multivar_in_file_gently(given_config_source.file,
 934                                                               argv[0], NULL, argv[1],
 935                                                               flags | CONFIG_FLAGS_MULTI_REPLACE);
 936         }
 937         else if (actions == ACTION_RENAME_SECTION) {
 938                 check_write();
 939                 check_argc(argc, 2, 2);
 940                 ret = git_config_rename_section_in_file(given_config_source.file,
 941                                                         argv[0], argv[1]);
 942                 if (ret < 0)
 943                         return ret;
 944                 else if (!ret)
 945                         die(_("no such section: %s"), argv[0]);
 946                 else
 947                         ret = 0;
 948         }
 949         else if (actions == ACTION_REMOVE_SECTION) {
 950                 check_write();
 951                 check_argc(argc, 1, 1);
 952                 ret = git_config_rename_section_in_file(given_config_source.file,
 953                                                         argv[0], NULL);
 954                 if (ret < 0)
 955                         return ret;
 956                 else if (!ret)
 957                         die(_("no such section: %s"), argv[0]);
 958                 else
 959                         ret = 0;
 960         }
 961         else if (actions == ACTION_GET_COLOR) {
 962                 check_argc(argc, 1, 2);
 963                 get_color(argv[0], argv[1]);
 964         }
 965         else if (actions == ACTION_GET_COLORBOOL) {
 966                 check_argc(argc, 1, 2);
 967                 if (argc == 2)
 968                         color_stdout_is_tty = git_config_bool("command line", argv[1]);
 969                 return get_colorbool(argv[0], argc == 2);
 970         }
 971
 972         free(value);
 973         return ret;
 974 }