builtin/config.c

   1 #include "builtin.h"
   2 #include "abspath.h"
   3 #include "config.h"
   4 #include "color.h"
   5 #include "editor.h"
   6 #include "environment.h"
   7 #include "repository.h"
   8 #include "gettext.h"
   9 #include "ident.h"
  10 #include "parse-options.h"
  11 #include "urlmatch.h"
  12 #include "path.h"
  13 #include "quote.h"
  14 #include "setup.h"
  15 #include "strbuf.h"
  16 #include "worktree.h"
  17
  18 static const char *const builtin_config_usage[] = {
  19         N_("git config [<options>]"),
  20         NULL
  21 };
  22
  23 static char *key;
  24 static regex_t *key_regexp;
  25 static const char *value_pattern;
  26 static regex_t *regexp;
  27 static int show_keys;
  28 static int omit_values;
  29 static int use_key_regexp;
  30 static int do_all;
  31 static int do_not_match;
  32 static char delim = '=';
  33 static char key_delim = ' ';
  34 static char term = '\n';
  35
  36 static int use_global_config, use_system_config, use_local_config;
  37 static int use_worktree_config;
  38 static struct git_config_source given_config_source;
  39 static int actions, type;
  40 static char *default_value;
  41 static int end_nul;
  42 static int respect_includes_opt = -1;
  43 static struct config_options config_options;
  44 static int show_origin;
  45 static int show_scope;
  46 static int fixed_value;
  47
  48 #define ACTION_GET (1<<0)
  49 #define ACTION_GET_ALL (1<<1)
  50 #define ACTION_GET_REGEXP (1<<2)
  51 #define ACTION_REPLACE_ALL (1<<3)
  52 #define ACTION_ADD (1<<4)
  53 #define ACTION_UNSET (1<<5)
  54 #define ACTION_UNSET_ALL (1<<6)
  55 #define ACTION_RENAME_SECTION (1<<7)
  56 #define ACTION_REMOVE_SECTION (1<<8)
  57 #define ACTION_LIST (1<<9)
  58 #define ACTION_EDIT (1<<10)
  59 #define ACTION_SET (1<<11)
  60 #define ACTION_SET_ALL (1<<12)
  61 #define ACTION_GET_COLOR (1<<13)
  62 #define ACTION_GET_COLORBOOL (1<<14)
  63 #define ACTION_GET_URLMATCH (1<<15)
  64
  65 /*
  66  * The actions "ACTION_LIST | ACTION_GET_*" which may produce more than
  67  * one line of output and which should therefore be paged.
  68  */
  69 #define PAGING_ACTIONS (ACTION_LIST | ACTION_GET_ALL | \
  70                         ACTION_GET_REGEXP | ACTION_GET_URLMATCH)
  71
  72 #define TYPE_BOOL               1
  73 #define TYPE_INT                2
  74 #define TYPE_BOOL_OR_INT        3
  75 #define TYPE_PATH               4
  76 #define TYPE_EXPIRY_DATE        5
  77 #define TYPE_COLOR              6
  78 #define TYPE_BOOL_OR_STR        7
  79
  80 #define OPT_CALLBACK_VALUE(s, l, v, h, i) \
  81         { OPTION_CALLBACK, (s), (l), (v), NULL, (h), PARSE_OPT_NOARG | \
  82         PARSE_OPT_NONEG, option_parse_type, (i) }
  83
  84 static NORETURN void usage_builtin_config(void);
  85
  86 static int option_parse_type(const struct option *opt, const char *arg,
  87                              int unset)
  88 {
  89         int new_type, *to_type;
  90
  91         if (unset) {
  92                 *((int *) opt->value) = 0;
  93                 return 0;
  94         }
  95
  96         /*
  97          * To support '--<type>' style flags, begin with new_type equal to
  98          * opt->defval.
  99          */
 100         new_type = opt->defval;
 101         if (!new_type) {
 102                 if (!strcmp(arg, "bool"))
 103                         new_type = TYPE_BOOL;
 104                 else if (!strcmp(arg, "int"))
 105                         new_type = TYPE_INT;
 106                 else if (!strcmp(arg, "bool-or-int"))
 107                         new_type = TYPE_BOOL_OR_INT;
 108                 else if (!strcmp(arg, "bool-or-str"))
 109                         new_type = TYPE_BOOL_OR_STR;
 110                 else if (!strcmp(arg, "path"))
 111                         new_type = TYPE_PATH;
 112                 else if (!strcmp(arg, "expiry-date"))
 113                         new_type = TYPE_EXPIRY_DATE;
 114                 else if (!strcmp(arg, "color"))
 115                         new_type = TYPE_COLOR;
 116                 else
 117                         die(_("unrecognized --type argument, %s"), arg);
 118         }
 119
 120         to_type = opt->value;
 121         if (*to_type && *to_type != new_type) {
 122                 /*
 123                  * Complain when there is a new type not equal to the old type.
 124                  * This allows for combinations like '--int --type=int' and
 125                  * '--type=int --type=int', but disallows ones like '--type=bool
 126                  * --int' and '--type=bool
 127                  * --type=int'.
 128                  */
 129                 error(_("only one type at a time"));
 130                 usage_builtin_config();
 131         }
 132         *to_type = new_type;
 133
 134         return 0;
 135 }
 136
 137 static struct option builtin_config_options[] = {
 138         OPT_GROUP(N_("Config file location")),
 139         OPT_BOOL(0, "global", &use_global_config, N_("use global config file")),
 140         OPT_BOOL(0, "system", &use_system_config, N_("use system config file")),
 141         OPT_BOOL(0, "local", &use_local_config, N_("use repository config file")),
 142         OPT_BOOL(0, "worktree", &use_worktree_config, N_("use per-worktree config file")),
 143         OPT_STRING('f', "file", &given_config_source.file, N_("file"), N_("use given config file")),
 144         OPT_STRING(0, "blob", &given_config_source.blob, N_("blob-id"), N_("read config from given blob object")),
 145         OPT_GROUP(N_("Action")),
 146         OPT_BIT(0, "get", &actions, N_("get value: name [value-pattern]"), ACTION_GET),
 147         OPT_BIT(0, "get-all", &actions, N_("get all values: key [value-pattern]"), ACTION_GET_ALL),
 148         OPT_BIT(0, "get-regexp", &actions, N_("get values for regexp: name-regex [value-pattern]"), ACTION_GET_REGEXP),
 149         OPT_BIT(0, "get-urlmatch", &actions, N_("get value specific for the URL: section[.var] URL"), ACTION_GET_URLMATCH),
 150         OPT_BIT(0, "replace-all", &actions, N_("replace all matching variables: name value [value-pattern]"), ACTION_REPLACE_ALL),
 151         OPT_BIT(0, "add", &actions, N_("add a new variable: name value"), ACTION_ADD),
 152         OPT_BIT(0, "unset", &actions, N_("remove a variable: name [value-pattern]"), ACTION_UNSET),
 153         OPT_BIT(0, "unset-all", &actions, N_("remove all matches: name [value-pattern]"), ACTION_UNSET_ALL),
 154         OPT_BIT(0, "rename-section", &actions, N_("rename section: old-name new-name"), ACTION_RENAME_SECTION),
 155         OPT_BIT(0, "remove-section", &actions, N_("remove a section: name"), ACTION_REMOVE_SECTION),
 156         OPT_BIT('l', "list", &actions, N_("list all"), ACTION_LIST),
 157         OPT_BOOL(0, "fixed-value", &fixed_value, N_("use string equality when comparing values to 'value-pattern'")),
 158         OPT_BIT('e', "edit", &actions, N_("open an editor"), ACTION_EDIT),
 159         OPT_BIT(0, "get-color", &actions, N_("find the color configured: slot [default]"), ACTION_GET_COLOR),
 160         OPT_BIT(0, "get-colorbool", &actions, N_("find the color setting: slot [stdout-is-tty]"), ACTION_GET_COLORBOOL),
 161         OPT_GROUP(N_("Type")),
 162         OPT_CALLBACK('t', "type", &type, N_("type"), N_("value is given this type"), option_parse_type),
 163         OPT_CALLBACK_VALUE(0, "bool", &type, N_("value is \"true\" or \"false\""), TYPE_BOOL),
 164         OPT_CALLBACK_VALUE(0, "int", &type, N_("value is decimal number"), TYPE_INT),
 165         OPT_CALLBACK_VALUE(0, "bool-or-int", &type, N_("value is --bool or --int"), TYPE_BOOL_OR_INT),
 166         OPT_CALLBACK_VALUE(0, "bool-or-str", &type, N_("value is --bool or string"), TYPE_BOOL_OR_STR),
 167         OPT_CALLBACK_VALUE(0, "path", &type, N_("value is a path (file or directory name)"), TYPE_PATH),
 168         OPT_CALLBACK_VALUE(0, "expiry-date", &type, N_("value is an expiry date"), TYPE_EXPIRY_DATE),
 169         OPT_GROUP(N_("Other")),
 170         OPT_BOOL('z', "null", &end_nul, N_("terminate values with NUL byte")),
 171         OPT_BOOL(0, "name-only", &omit_values, N_("show variable names only")),
 172         OPT_BOOL(0, "includes", &respect_includes_opt, N_("respect include directives on lookup")),
 173         OPT_BOOL(0, "show-origin", &show_origin, N_("show origin of config (file, standard input, blob, command line)")),
 174         OPT_BOOL(0, "show-scope", &show_scope, N_("show scope of config (worktree, local, global, system, command)")),
 175         OPT_STRING(0, "default", &default_value, N_("value"), N_("with --get, use default value when missing entry")),
 176         OPT_END(),
 177 };
 178
 179 static NORETURN void usage_builtin_config(void)
 180 {
 181         usage_with_options(builtin_config_usage, builtin_config_options);
 182 }
 183
 184 static void check_argc(int argc, int min, int max)
 185 {
 186         if (argc >= min && argc <= max)
 187                 return;
 188         if (min == max)
 189                 error(_("wrong number of arguments, should be %d"), min);
 190         else
 191                 error(_("wrong number of arguments, should be from %d to %d"),
 192                       min, max);
 193         usage_builtin_config();
 194 }
 195
 196 static void show_config_origin(struct strbuf *buf)
 197 {
 198         const char term = end_nul ? '\0' : '\t';
 199
 200         strbuf_addstr(buf, current_config_origin_type());
 201         strbuf_addch(buf, ':');
 202         if (end_nul)
 203                 strbuf_addstr(buf, current_config_name());
 204         else
 205                 quote_c_style(current_config_name(), buf, NULL, 0);
 206         strbuf_addch(buf, term);
 207 }
 208
 209 static void show_config_scope(struct strbuf *buf)
 210 {
 211         const char term = end_nul ? '\0' : '\t';
 212         const char *scope = config_scope_name(current_config_scope());
 213
 214         strbuf_addstr(buf, N_(scope));
 215         strbuf_addch(buf, term);
 216 }
 217
 218 static int show_all_config(const char *key_, const char *value_,
 219                            void *cb UNUSED)
 220 {
 221         if (show_origin || show_scope) {
 222                 struct strbuf buf = STRBUF_INIT;
 223                 if (show_scope)
 224                         show_config_scope(&buf);
 225                 if (show_origin)
 226                         show_config_origin(&buf);
 227                 /* Use fwrite as "buf" can contain \0's if "end_null" is set. */
 228                 fwrite(buf.buf, 1, buf.len, stdout);
 229                 strbuf_release(&buf);
 230         }
 231         if (!omit_values && value_)
 232                 printf("%s%c%s%c", key_, delim, value_, term);
 233         else
 234                 printf("%s%c", key_, term);
 235         return 0;
 236 }
 237
 238 struct strbuf_list {
 239         struct strbuf *items;
 240         int nr;
 241         int alloc;
 242 };
 243
 244 static int format_config(struct strbuf *buf, const char *key_, const char *value_)
 245 {
 246         if (show_scope)
 247                 show_config_scope(buf);
 248         if (show_origin)
 249                 show_config_origin(buf);
 250         if (show_keys)
 251                 strbuf_addstr(buf, key_);
 252         if (!omit_values) {
 253                 if (show_keys)
 254                         strbuf_addch(buf, key_delim);
 255
 256                 if (type == TYPE_INT)
 257                         strbuf_addf(buf, "%"PRId64,
 258                                     git_config_int64(key_, value_ ? value_ : ""));
 259                 else if (type == TYPE_BOOL)
 260                         strbuf_addstr(buf, git_config_bool(key_, value_) ?
 261                                       "true" : "false");
 262                 else if (type == TYPE_BOOL_OR_INT) {
 263                         int is_bool, v;
 264                         v = git_config_bool_or_int(key_, value_, &is_bool);
 265                         if (is_bool)
 266                                 strbuf_addstr(buf, v ? "true" : "false");
 267                         else
 268                                 strbuf_addf(buf, "%d", v);
 269                 } else if (type == TYPE_BOOL_OR_STR) {
 270                         int v = git_parse_maybe_bool(value_);
 271                         if (v < 0)
 272                                 strbuf_addstr(buf, value_);
 273                         else
 274                                 strbuf_addstr(buf, v ? "true" : "false");
 275                 } else if (type == TYPE_PATH) {
 276                         const char *v;
 277                         if (git_config_pathname(&v, key_, value_) < 0)
 278                                 return -1;
 279                         strbuf_addstr(buf, v);
 280                         free((char *)v);
 281                 } else if (type == TYPE_EXPIRY_DATE) {
 282                         timestamp_t t;
 283                         if (git_config_expiry_date(&t, key_, value_) < 0)
 284                                 return -1;
 285                         strbuf_addf(buf, "%"PRItime, t);
 286                 } else if (type == TYPE_COLOR) {
 287                         char v[COLOR_MAXLEN];
 288                         if (git_config_color(v, key_, value_) < 0)
 289                                 return -1;
 290                         strbuf_addstr(buf, v);
 291                 } else if (value_) {
 292                         strbuf_addstr(buf, value_);
 293                 } else {
 294                         /* Just show the key name; back out delimiter */
 295                         if (show_keys)
 296                                 strbuf_setlen(buf, buf->len - 1);
 297                 }
 298         }
 299         strbuf_addch(buf, term);
 300         return 0;
 301 }
 302
 303 static int collect_config(const char *key_, const char *value_, void *cb)
 304 {
 305         struct strbuf_list *values = cb;
 306
 307         if (!use_key_regexp && strcmp(key_, key))
 308                 return 0;
 309         if (use_key_regexp && regexec(key_regexp, key_, 0, NULL, 0))
 310                 return 0;
 311         if (fixed_value && strcmp(value_pattern, (value_?value_:"")))
 312                 return 0;
 313         if (regexp != NULL &&
 314             (do_not_match ^ !!regexec(regexp, (value_?value_:""), 0, NULL, 0)))
 315                 return 0;
 316
 317         ALLOC_GROW(values->items, values->nr + 1, values->alloc);
 318         strbuf_init(&values->items[values->nr], 0);
 319
 320         return format_config(&values->items[values->nr++], key_, value_);
 321 }
 322
 323 static int get_value(const char *key_, const char *regex_, unsigned flags)
 324 {
 325         int ret = CONFIG_GENERIC_ERROR;
 326         struct strbuf_list values = {NULL};
 327         int i;
 328
 329         if (use_key_regexp) {
 330                 char *tl;
 331
 332                 /*
 333                  * NEEDSWORK: this naive pattern lowercasing obviously does not
 334                  * work for more complex patterns like "^[^.]*Foo.*bar".
 335                  * Perhaps we should deprecate this altogether someday.
 336                  */
 337
 338                 key = xstrdup(key_);
 339                 for (tl = key + strlen(key) - 1;
 340                      tl >= key && *tl != '.';
 341                      tl--)
 342                         *tl = tolower(*tl);
 343                 for (tl = key; *tl && *tl != '.'; tl++)
 344                         *tl = tolower(*tl);
 345
 346                 key_regexp = (regex_t*)xmalloc(sizeof(regex_t));
 347                 if (regcomp(key_regexp, key, REG_EXTENDED)) {
 348                         error(_("invalid key pattern: %s"), key_);
 349                         FREE_AND_NULL(key_regexp);
 350                         ret = CONFIG_INVALID_PATTERN;
 351                         goto free_strings;
 352                 }
 353         } else {
 354                 if (git_config_parse_key(key_, &key, NULL)) {
 355                         ret = CONFIG_INVALID_KEY;
 356                         goto free_strings;
 357                 }
 358         }
 359
 360         if (regex_ && (flags & CONFIG_FLAGS_FIXED_VALUE))
 361                 value_pattern = regex_;
 362         else if (regex_) {
 363                 if (regex_[0] == '!') {
 364                         do_not_match = 1;
 365                         regex_++;
 366                 }
 367
 368                 regexp = (regex_t*)xmalloc(sizeof(regex_t));
 369                 if (regcomp(regexp, regex_, REG_EXTENDED)) {
 370                         error(_("invalid pattern: %s"), regex_);
 371                         FREE_AND_NULL(regexp);
 372                         ret = CONFIG_INVALID_PATTERN;
 373                         goto free_strings;
 374                 }
 375         }
 376
 377         config_with_options(collect_config, &values,
 378                             &given_config_source, the_repository,
 379                             &config_options);
 380
 381         if (!values.nr && default_value) {
 382                 struct strbuf *item;
 383                 ALLOC_GROW(values.items, values.nr + 1, values.alloc);
 384                 item = &values.items[values.nr++];
 385                 strbuf_init(item, 0);
 386                 if (format_config(item, key_, default_value) < 0)
 387                         die(_("failed to format default config value: %s"),
 388                                 default_value);
 389         }
 390
 391         ret = !values.nr;
 392
 393         for (i = 0; i < values.nr; i++) {
 394                 struct strbuf *buf = values.items + i;
 395                 if (do_all || i == values.nr - 1)
 396                         fwrite(buf->buf, 1, buf->len, stdout);
 397                 strbuf_release(buf);
 398         }
 399         free(values.items);
 400
 401 free_strings:
 402         free(key);
 403         if (key_regexp) {
 404                 regfree(key_regexp);
 405                 free(key_regexp);
 406         }
 407         if (regexp) {
 408                 regfree(regexp);
 409                 free(regexp);
 410         }
 411
 412         return ret;
 413 }
 414
 415 static char *normalize_value(const char *key, const char *value)
 416 {
 417         if (!value)
 418                 return NULL;
 419
 420         if (type == 0 || type == TYPE_PATH || type == TYPE_EXPIRY_DATE)
 421                 /*
 422                  * We don't do normalization for TYPE_PATH here: If
 423                  * the path is like ~/foobar/, we prefer to store
 424                  * "~/foobar/" in the config file, and to expand the ~
 425                  * when retrieving the value.
 426                  * Also don't do normalization for expiry dates.
 427                  */
 428                 return xstrdup(value);
 429         if (type == TYPE_INT)
 430                 return xstrfmt("%"PRId64, git_config_int64(key, value));
 431         if (type == TYPE_BOOL)
 432                 return xstrdup(git_config_bool(key, value) ?  "true" : "false");
 433         if (type == TYPE_BOOL_OR_INT) {
 434                 int is_bool, v;
 435                 v = git_config_bool_or_int(key, value, &is_bool);
 436                 if (!is_bool)
 437                         return xstrfmt("%d", v);
 438                 else
 439                         return xstrdup(v ? "true" : "false");
 440         }
 441         if (type == TYPE_BOOL_OR_STR) {
 442                 int v = git_parse_maybe_bool(value);
 443                 if (v < 0)
 444                         return xstrdup(value);
 445                 else
 446                         return xstrdup(v ? "true" : "false");
 447         }
 448         if (type == TYPE_COLOR) {
 449                 char v[COLOR_MAXLEN];
 450                 if (git_config_color(v, key, value))
 451                         die(_("cannot parse color '%s'"), value);
 452
 453                 /*
 454                  * The contents of `v` now contain an ANSI escape
 455                  * sequence, not suitable for including within a
 456                  * configuration file. Treat the above as a
 457                  * "sanity-check", and return the given value, which we
 458                  * know is representable as valid color code.
 459                  */
 460                 return xstrdup(value);
 461         }
 462
 463         BUG("cannot normalize type %d", type);
 464 }
 465
 466 static int get_color_found;
 467 static const char *get_color_slot;
 468 static const char *get_colorbool_slot;
 469 static char parsed_color[COLOR_MAXLEN];
 470
 471 static int git_get_color_config(const char *var, const char *value,
 472                                 void *cb UNUSED)
 473 {
 474         if (!strcmp(var, get_color_slot)) {
 475                 if (!value)
 476                         config_error_nonbool(var);
 477                 if (color_parse(value, parsed_color) < 0)
 478                         return -1;
 479                 get_color_found = 1;
 480         }
 481         return 0;
 482 }
 483
 484 static void get_color(const char *var, const char *def_color)
 485 {
 486         get_color_slot = var;
 487         get_color_found = 0;
 488         parsed_color[0] = '\0';
 489         config_with_options(git_get_color_config, NULL,
 490                             &given_config_source, the_repository,
 491                             &config_options);
 492
 493         if (!get_color_found && def_color) {
 494                 if (color_parse(def_color, parsed_color) < 0)
 495                         die(_("unable to parse default color value"));
 496         }
 497
 498         fputs(parsed_color, stdout);
 499 }
 500
 501 static int get_colorbool_found;
 502 static int get_diff_color_found;
 503 static int get_color_ui_found;
 504 static int git_get_colorbool_config(const char *var, const char *value,
 505                                     void *data UNUSED)
 506 {
 507         if (!strcmp(var, get_colorbool_slot))
 508                 get_colorbool_found = git_config_colorbool(var, value);
 509         else if (!strcmp(var, "diff.color"))
 510                 get_diff_color_found = git_config_colorbool(var, value);
 511         else if (!strcmp(var, "color.ui"))
 512                 get_color_ui_found = git_config_colorbool(var, value);
 513         return 0;
 514 }
 515
 516 static int get_colorbool(const char *var, int print)
 517 {
 518         get_colorbool_slot = var;
 519         get_colorbool_found = -1;
 520         get_diff_color_found = -1;
 521         get_color_ui_found = -1;
 522         config_with_options(git_get_colorbool_config, NULL,
 523                             &given_config_source, the_repository,
 524                             &config_options);
 525
 526         if (get_colorbool_found < 0) {
 527                 if (!strcmp(get_colorbool_slot, "color.diff"))
 528                         get_colorbool_found = get_diff_color_found;
 529                 if (get_colorbool_found < 0)
 530                         get_colorbool_found = get_color_ui_found;
 531         }
 532
 533         if (get_colorbool_found < 0)
 534                 /* default value if none found in config */
 535                 get_colorbool_found = GIT_COLOR_AUTO;
 536
 537         get_colorbool_found = want_color(get_colorbool_found);
 538
 539         if (print) {
 540                 printf("%s\n", get_colorbool_found ? "true" : "false");
 541                 return 0;
 542         } else
 543                 return get_colorbool_found ? 0 : 1;
 544 }
 545
 546 static void check_write(void)
 547 {
 548         if (!given_config_source.file && !startup_info->have_repository)
 549                 die(_("not in a git directory"));
 550
 551         if (given_config_source.use_stdin)
 552                 die(_("writing to stdin is not supported"));
 553
 554         if (given_config_source.blob)
 555                 die(_("writing config blobs is not supported"));
 556 }
 557
 558 struct urlmatch_current_candidate_value {
 559         char value_is_null;
 560         struct strbuf value;
 561 };
 562
 563 static int urlmatch_collect_fn(const char *var, const char *value, void *cb)
 564 {
 565         struct string_list *values = cb;
 566         struct string_list_item *item = string_list_insert(values, var);
 567         struct urlmatch_current_candidate_value *matched = item->util;
 568
 569         if (!matched) {
 570                 matched = xmalloc(sizeof(*matched));
 571                 strbuf_init(&matched->value, 0);
 572                 item->util = matched;
 573         } else {
 574                 strbuf_reset(&matched->value);
 575         }
 576
 577         if (value) {
 578                 strbuf_addstr(&matched->value, value);
 579                 matched->value_is_null = 0;
 580         } else {
 581                 matched->value_is_null = 1;
 582         }
 583         return 0;
 584 }
 585
 586 static int get_urlmatch(const char *var, const char *url)
 587 {
 588         int ret;
 589         char *section_tail;
 590         struct string_list_item *item;
 591         struct urlmatch_config config = URLMATCH_CONFIG_INIT;
 592         struct string_list values = STRING_LIST_INIT_DUP;
 593
 594         config.collect_fn = urlmatch_collect_fn;
 595         config.cascade_fn = NULL;
 596         config.cb = &values;
 597
 598         if (!url_normalize(url, &config.url))
 599                 die("%s", config.url.err);
 600
 601         config.section = xstrdup_tolower(var);
 602         section_tail = strchr(config.section, '.');
 603         if (section_tail) {
 604                 *section_tail = '\0';
 605                 config.key = section_tail + 1;
 606                 show_keys = 0;
 607         } else {
 608                 config.key = NULL;
 609                 show_keys = 1;
 610         }
 611
 612         config_with_options(urlmatch_config_entry, &config,
 613                             &given_config_source, the_repository,
 614                             &config_options);
 615
 616         ret = !values.nr;
 617
 618         for_each_string_list_item(item, &values) {
 619                 struct urlmatch_current_candidate_value *matched = item->util;
 620                 struct strbuf buf = STRBUF_INIT;
 621
 622                 format_config(&buf, item->string,
 623                               matched->value_is_null ? NULL : matched->value.buf);
 624                 fwrite(buf.buf, 1, buf.len, stdout);
 625                 strbuf_release(&buf);
 626
 627                 strbuf_release(&matched->value);
 628         }
 629         urlmatch_config_release(&config);
 630         string_list_clear(&values, 1);
 631         free(config.url.url);
 632
 633         free((void *)config.section);
 634         return ret;
 635 }
 636
 637 static char *default_user_config(void)
 638 {
 639         struct strbuf buf = STRBUF_INIT;
 640         strbuf_addf(&buf,
 641                     _("# This is Git's per-user configuration file.\n"
 642                       "[user]\n"
 643                       "# Please adapt and uncomment the following lines:\n"
 644                       "#        name = %s\n"
 645                       "#        email = %s\n"),
 646                     ident_default_name(),
 647                     ident_default_email());
 648         return strbuf_detach(&buf, NULL);
 649 }
 650
 651 int cmd_config(int argc, const char **argv, const char *prefix)
 652 {
 653         int nongit = !startup_info->have_repository;
 654         char *value = NULL;
 655         int flags = 0;
 656         int ret = 0;
 657
 658         given_config_source.file = xstrdup_or_null(getenv(CONFIG_ENVIRONMENT));
 659
 660         argc = parse_options(argc, argv, prefix, builtin_config_options,
 661                              builtin_config_usage,
 662                              PARSE_OPT_STOP_AT_NON_OPTION);
 663
 664         if (use_global_config + use_system_config + use_local_config +
 665             use_worktree_config +
 666             !!given_config_source.file + !!given_config_source.blob > 1) {
 667                 error(_("only one config file at a time"));
 668                 usage_builtin_config();
 669         }
 670
 671         if (nongit) {
 672                 if (use_local_config)
 673                         die(_("--local can only be used inside a git repository"));
 674                 if (given_config_source.blob)
 675                         die(_("--blob can only be used inside a git repository"));
 676                 if (use_worktree_config)
 677                         die(_("--worktree can only be used inside a git repository"));
 678
 679         }
 680
 681         if (given_config_source.file &&
 682                         !strcmp(given_config_source.file, "-")) {
 683                 given_config_source.file = NULL;
 684                 given_config_source.use_stdin = 1;
 685                 given_config_source.scope = CONFIG_SCOPE_COMMAND;
 686         }
 687
 688         if (use_global_config) {
 689                 char *user_config, *xdg_config;
 690
 691                 git_global_config(&user_config, &xdg_config);
 692                 if (!user_config)
 693                         /*
 694                          * It is unknown if HOME/.gitconfig exists, so
 695                          * we do not know if we should write to XDG
 696                          * location; error out even if XDG_CONFIG_HOME
 697                          * is set and points at a sane location.
 698                          */
 699                         die(_("$HOME not set"));
 700
 701                 given_config_source.scope = CONFIG_SCOPE_GLOBAL;
 702
 703                 if (access_or_warn(user_config, R_OK, 0) &&
 704                     xdg_config && !access_or_warn(xdg_config, R_OK, 0)) {
 705                         given_config_source.file = xdg_config;
 706                         free(user_config);
 707                 } else {
 708                         given_config_source.file = user_config;
 709                         free(xdg_config);
 710                 }
 711         }
 712         else if (use_system_config) {
 713                 given_config_source.file = git_system_config();
 714                 given_config_source.scope = CONFIG_SCOPE_SYSTEM;
 715         } else if (use_local_config) {
 716                 given_config_source.file = git_pathdup("config");
 717                 given_config_source.scope = CONFIG_SCOPE_LOCAL;
 718         } else if (use_worktree_config) {
 719                 struct worktree **worktrees = get_worktrees();
 720                 if (the_repository->repository_format_worktree_config)
 721                         given_config_source.file = git_pathdup("config.worktree");
 722                 else if (worktrees[0] && worktrees[1])
 723                         die(_("--worktree cannot be used with multiple "
 724                               "working trees unless the config\n"
 725                               "extension worktreeConfig is enabled. "
 726                               "Please read \"CONFIGURATION FILE\"\n"
 727                               "section in \"git help worktree\" for details"));
 728                 else
 729                         given_config_source.file = git_pathdup("config");
 730                 given_config_source.scope = CONFIG_SCOPE_LOCAL;
 731                 free_worktrees(worktrees);
 732         } else if (given_config_source.file) {
 733                 if (!is_absolute_path(given_config_source.file) && prefix)
 734                         given_config_source.file =
 735                                 prefix_filename(prefix, given_config_source.file);
 736                 given_config_source.scope = CONFIG_SCOPE_COMMAND;
 737         } else if (given_config_source.blob) {
 738                 given_config_source.scope = CONFIG_SCOPE_COMMAND;
 739         }
 740
 741
 742         if (respect_includes_opt == -1)
 743                 config_options.respect_includes = !given_config_source.file;
 744         else
 745                 config_options.respect_includes = respect_includes_opt;
 746         if (!nongit) {
 747                 config_options.commondir = get_git_common_dir();
 748                 config_options.git_dir = get_git_dir();
 749         }
 750
 751         if (end_nul) {
 752                 term = '\0';
 753                 delim = '\n';
 754                 key_delim = '\n';
 755         }
 756
 757         if ((actions & (ACTION_GET_COLOR|ACTION_GET_COLORBOOL)) && type) {
 758                 error(_("--get-color and variable type are incoherent"));
 759                 usage_builtin_config();
 760         }
 761
 762         if (HAS_MULTI_BITS(actions)) {
 763                 error(_("only one action at a time"));
 764                 usage_builtin_config();
 765         }
 766         if (actions == 0)
 767                 switch (argc) {
 768                 case 1: actions = ACTION_GET; break;
 769                 case 2: actions = ACTION_SET; break;
 770                 case 3: actions = ACTION_SET_ALL; break;
 771                 default:
 772                         usage_builtin_config();
 773                 }
 774         if (omit_values &&
 775             !(actions == ACTION_LIST || actions == ACTION_GET_REGEXP)) {
 776                 error(_("--name-only is only applicable to --list or --get-regexp"));
 777                 usage_builtin_config();
 778         }
 779
 780         if (show_origin && !(actions &
 781                 (ACTION_GET|ACTION_GET_ALL|ACTION_GET_REGEXP|ACTION_LIST))) {
 782                 error(_("--show-origin is only applicable to --get, --get-all, "
 783                         "--get-regexp, and --list"));
 784                 usage_builtin_config();
 785         }
 786
 787         if (default_value && !(actions & ACTION_GET)) {
 788                 error(_("--default is only applicable to --get"));
 789                 usage_builtin_config();
 790         }
 791
 792         /* check usage of --fixed-value */
 793         if (fixed_value) {
 794                 int allowed_usage = 0;
 795
 796                 switch (actions) {
 797                 /* git config --get <name> <value-pattern> */
 798                 case ACTION_GET:
 799                 /* git config --get-all <name> <value-pattern> */
 800                 case ACTION_GET_ALL:
 801                 /* git config --get-regexp <name-pattern> <value-pattern> */
 802                 case ACTION_GET_REGEXP:
 803                 /* git config --unset <name> <value-pattern> */
 804                 case ACTION_UNSET:
 805                 /* git config --unset-all <name> <value-pattern> */
 806                 case ACTION_UNSET_ALL:
 807                         allowed_usage = argc > 1 && !!argv[1];
 808                         break;
 809
 810                 /* git config <name> <value> <value-pattern> */
 811                 case ACTION_SET_ALL:
 812                 /* git config --replace-all <name> <value> <value-pattern> */
 813                 case ACTION_REPLACE_ALL:
 814                         allowed_usage = argc > 2 && !!argv[2];
 815                         break;
 816
 817                 /* other options don't allow --fixed-value */
 818                 }
 819
 820                 if (!allowed_usage) {
 821                         error(_("--fixed-value only applies with 'value-pattern'"));
 822                         usage_builtin_config();
 823                 }
 824
 825                 flags |= CONFIG_FLAGS_FIXED_VALUE;
 826         }
 827
 828         if (actions & PAGING_ACTIONS)
 829                 setup_auto_pager("config", 1);
 830
 831         if (actions == ACTION_LIST) {
 832                 check_argc(argc, 0, 0);
 833                 if (config_with_options(show_all_config, NULL,
 834                                         &given_config_source, the_repository,
 835                                         &config_options) < 0) {
 836                         if (given_config_source.file)
 837                                 die_errno(_("unable to read config file '%s'"),
 838                                           given_config_source.file);
 839                         else
 840                                 die(_("error processing config file(s)"));
 841                 }
 842         }
 843         else if (actions == ACTION_EDIT) {
 844                 char *config_file;
 845
 846                 check_argc(argc, 0, 0);
 847                 if (!given_config_source.file && nongit)
 848                         die(_("not in a git directory"));
 849                 if (given_config_source.use_stdin)
 850                         die(_("editing stdin is not supported"));
 851                 if (given_config_source.blob)
 852                         die(_("editing blobs is not supported"));
 853                 git_config(git_default_config, NULL);
 854                 config_file = given_config_source.file ?
 855                                 xstrdup(given_config_source.file) :
 856                                 git_pathdup("config");
 857                 if (use_global_config) {
 858                         int fd = open(config_file, O_CREAT | O_EXCL | O_WRONLY, 0666);
 859                         if (fd >= 0) {
 860                                 char *content = default_user_config();
 861                                 write_str_in_full(fd, content);
 862                                 free(content);
 863                                 close(fd);
 864                         }
 865                         else if (errno != EEXIST)
 866                                 die_errno(_("cannot create configuration file %s"), config_file);
 867                 }
 868                 launch_editor(config_file, NULL, NULL);
 869                 free(config_file);
 870         }
 871         else if (actions == ACTION_SET) {
 872                 check_write();
 873                 check_argc(argc, 2, 2);
 874                 value = normalize_value(argv[0], argv[1]);
 875                 ret = git_config_set_in_file_gently(given_config_source.file, argv[0], value);
 876                 if (ret == CONFIG_NOTHING_SET)
 877                         error(_("cannot overwrite multiple values with a single value\n"
 878                         "       Use a regexp, --add or --replace-all to change %s."), argv[0]);
 879         }
 880         else if (actions == ACTION_SET_ALL) {
 881                 check_write();
 882                 check_argc(argc, 2, 3);
 883                 value = normalize_value(argv[0], argv[1]);
 884                 ret = git_config_set_multivar_in_file_gently(given_config_source.file,
 885                                                              argv[0], value, argv[2],
 886                                                              flags);
 887         }
 888         else if (actions == ACTION_ADD) {
 889                 check_write();
 890                 check_argc(argc, 2, 2);
 891                 value = normalize_value(argv[0], argv[1]);
 892                 ret = git_config_set_multivar_in_file_gently(given_config_source.file,
 893                                                              argv[0], value,
 894                                                              CONFIG_REGEX_NONE,
 895                                                              flags);
 896         }
 897         else if (actions == ACTION_REPLACE_ALL) {
 898                 check_write();
 899                 check_argc(argc, 2, 3);
 900                 value = normalize_value(argv[0], argv[1]);
 901                 ret = git_config_set_multivar_in_file_gently(given_config_source.file,
 902                                                              argv[0], value, argv[2],
 903                                                              flags | CONFIG_FLAGS_MULTI_REPLACE);
 904         }
 905         else if (actions == ACTION_GET) {
 906                 check_argc(argc, 1, 2);
 907                 return get_value(argv[0], argv[1], flags);
 908         }
 909         else if (actions == ACTION_GET_ALL) {
 910                 do_all = 1;
 911                 check_argc(argc, 1, 2);
 912                 return get_value(argv[0], argv[1], flags);
 913         }
 914         else if (actions == ACTION_GET_REGEXP) {
 915                 show_keys = 1;
 916                 use_key_regexp = 1;
 917                 do_all = 1;
 918                 check_argc(argc, 1, 2);
 919                 return get_value(argv[0], argv[1], flags);
 920         }
 921         else if (actions == ACTION_GET_URLMATCH) {
 922                 check_argc(argc, 2, 2);
 923                 return get_urlmatch(argv[0], argv[1]);
 924         }
 925         else if (actions == ACTION_UNSET) {
 926                 check_write();
 927                 check_argc(argc, 1, 2);
 928                 if (argc == 2)
 929                         return git_config_set_multivar_in_file_gently(given_config_source.file,
 930                                                                       argv[0], NULL, argv[1],
 931                                                                       flags);
 932                 else
 933                         return git_config_set_in_file_gently(given_config_source.file,
 934                                                              argv[0], NULL);
 935         }
 936         else if (actions == ACTION_UNSET_ALL) {
 937                 check_write();
 938                 check_argc(argc, 1, 2);
 939                 return git_config_set_multivar_in_file_gently(given_config_source.file,
 940                                                               argv[0], NULL, argv[1],
 941                                                               flags | CONFIG_FLAGS_MULTI_REPLACE);
 942         }
 943         else if (actions == ACTION_RENAME_SECTION) {
 944                 check_write();
 945                 check_argc(argc, 2, 2);
 946                 ret = git_config_rename_section_in_file(given_config_source.file,
 947                                                         argv[0], argv[1]);
 948                 if (ret < 0)
 949                         return ret;
 950                 else if (!ret)
 951                         die(_("no such section: %s"), argv[0]);
 952                 else
 953                         ret = 0;
 954         }
 955         else if (actions == ACTION_REMOVE_SECTION) {
 956                 check_write();
 957                 check_argc(argc, 1, 1);
 958                 ret = git_config_rename_section_in_file(given_config_source.file,
 959                                                         argv[0], NULL);
 960                 if (ret < 0)
 961                         return ret;
 962                 else if (!ret)
 963                         die(_("no such section: %s"), argv[0]);
 964                 else
 965                         ret = 0;
 966         }
 967         else if (actions == ACTION_GET_COLOR) {
 968                 check_argc(argc, 1, 2);
 969                 get_color(argv[0], argv[1]);
 970         }
 971         else if (actions == ACTION_GET_COLORBOOL) {
 972                 check_argc(argc, 1, 2);
 973                 if (argc == 2)
 974                         color_stdout_is_tty = git_config_bool("command line", argv[1]);
 975                 return get_colorbool(argv[0], argc == 2);
 976         }
 977
 978         free(value);
 979         return ret;
 980 }