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