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 "editor.h"
   7 #include "environment.h"
   8 #include "repository.h"
   9 #include "gettext.h"
  10 #include "ident.h"
  11 #include "parse-options.h"
  12 #include "urlmatch.h"
  13 #include "path.h"
  14 #include "quote.h"
  15 #include "setup.h"
  16 #include "worktree.h"
  17 #include "wrapper.h"
  18
  19 static const char *const builtin_config_usage[] = {
  20         N_("git config [<options>]"),
  21         NULL
  22 };
  23
  24 static char *key;
  25 static regex_t *key_regexp;
  26 static const char *value_pattern;
  27 static regex_t *regexp;
  28 static int show_keys;
  29 static int omit_values;
  30 static int use_key_regexp;
  31 static int do_all;
  32 static int do_not_match;
  33 static char delim = '=';
  34 static char key_delim = ' ';
  35 static char term = '\n';
  36
  37 static int use_global_config, use_system_config, use_local_config;
  38 static int use_worktree_config;
  39 static struct git_config_source given_config_source;
  40 static int actions, type;
  41 static char *default_value;
  42 static int end_nul;
  43 static int respect_includes_opt = -1;
  44 static struct config_options config_options;
  45 static int show_origin;
  46 static int show_scope;
  47 static int fixed_value;
  48
  49 #define ACTION_GET (1<<0)
  50 #define ACTION_GET_ALL (1<<1)
  51 #define ACTION_GET_REGEXP (1<<2)
  52 #define ACTION_REPLACE_ALL (1<<3)
  53 #define ACTION_ADD (1<<4)
  54 #define ACTION_UNSET (1<<5)
  55 #define ACTION_UNSET_ALL (1<<6)
  56 #define ACTION_RENAME_SECTION (1<<7)
  57 #define ACTION_REMOVE_SECTION (1<<8)
  58 #define ACTION_LIST (1<<9)
  59 #define ACTION_EDIT (1<<10)
  60 #define ACTION_SET (1<<11)
  61 #define ACTION_SET_ALL (1<<12)
  62 #define ACTION_GET_COLOR (1<<13)
  63 #define ACTION_GET_COLORBOOL (1<<14)
  64 #define ACTION_GET_URLMATCH (1<<15)
  65
  66 /*
  67  * The actions "ACTION_LIST | ACTION_GET_*" which may produce more than
  68  * one line of output and which should therefore be paged.
  69  */
  70 #define PAGING_ACTIONS (ACTION_LIST | ACTION_GET_ALL | \
  71                         ACTION_GET_REGEXP | ACTION_GET_URLMATCH)
  72
  73 #define TYPE_BOOL               1
  74 #define TYPE_INT                2
  75 #define TYPE_BOOL_OR_INT        3
  76 #define TYPE_PATH               4
  77 #define TYPE_EXPIRY_DATE        5
  78 #define TYPE_COLOR              6
  79 #define TYPE_BOOL_OR_STR        7
  80
  81 #define OPT_CALLBACK_VALUE(s, l, v, h, i) \
  82         { OPTION_CALLBACK, (s), (l), (v), NULL, (h), PARSE_OPT_NOARG | \
  83         PARSE_OPT_NONEG, option_parse_type, (i) }
  84
  85 static NORETURN void usage_builtin_config(void);
  86
  87 static int option_parse_type(const struct option *opt, const char *arg,
  88                              int unset)
  89 {
  90         int new_type, *to_type;
  91
  92         if (unset) {
  93                 *((int *) opt->value) = 0;
  94                 return 0;
  95         }
  96
  97         /*
  98          * To support '--<type>' style flags, begin with new_type equal to
  99          * opt->defval.
 100          */
 101         new_type = opt->defval;
 102         if (!new_type) {
 103                 if (!strcmp(arg, "bool"))
 104                         new_type = TYPE_BOOL;
 105                 else if (!strcmp(arg, "int"))
 106                         new_type = TYPE_INT;
 107                 else if (!strcmp(arg, "bool-or-int"))
 108                         new_type = TYPE_BOOL_OR_INT;
 109                 else if (!strcmp(arg, "bool-or-str"))
 110                         new_type = TYPE_BOOL_OR_STR;
 111                 else if (!strcmp(arg, "path"))
 112                         new_type = TYPE_PATH;
 113                 else if (!strcmp(arg, "expiry-date"))
 114                         new_type = TYPE_EXPIRY_DATE;
 115                 else if (!strcmp(arg, "color"))
 116                         new_type = TYPE_COLOR;
 117                 else
 118                         die(_("unrecognized --type argument, %s"), arg);
 119         }
 120
 121         to_type = opt->value;
 122         if (*to_type && *to_type != new_type) {
 123                 /*
 124                  * Complain when there is a new type not equal to the old type.
 125                  * This allows for combinations like '--int --type=int' and
 126                  * '--type=int --type=int', but disallows ones like '--type=bool
 127                  * --int' and '--type=bool
 128                  * --type=int'.
 129                  */
 130                 error(_("only one type at a time"));
 131                 usage_builtin_config();
 132         }
 133         *to_type = new_type;
 134
 135         return 0;
 136 }
 137
 138 static struct option builtin_config_options[] = {
 139         OPT_GROUP(N_("Config file location")),
 140         OPT_BOOL(0, "global", &use_global_config, N_("use global config file")),
 141         OPT_BOOL(0, "system", &use_system_config, N_("use system config file")),
 142         OPT_BOOL(0, "local", &use_local_config, N_("use repository config file")),
 143         OPT_BOOL(0, "worktree", &use_worktree_config, N_("use per-worktree config file")),
 144         OPT_STRING('f', "file", &given_config_source.file, N_("file"), N_("use given config file")),
 145         OPT_STRING(0, "blob", &given_config_source.blob, N_("blob-id"), N_("read config from given blob object")),
 146         OPT_GROUP(N_("Action")),
 147         OPT_BIT(0, "get", &actions, N_("get value: name [value-pattern]"), ACTION_GET),
 148         OPT_BIT(0, "get-all", &actions, N_("get all values: key [value-pattern]"), ACTION_GET_ALL),
 149         OPT_BIT(0, "get-regexp", &actions, N_("get values for regexp: name-regex [value-pattern]"), ACTION_GET_REGEXP),
 150         OPT_BIT(0, "get-urlmatch", &actions, N_("get value specific for the URL: section[.var] URL"), ACTION_GET_URLMATCH),
 151         OPT_BIT(0, "replace-all", &actions, N_("replace all matching variables: name value [value-pattern]"), ACTION_REPLACE_ALL),
 152         OPT_BIT(0, "add", &actions, N_("add a new variable: name value"), ACTION_ADD),
 153         OPT_BIT(0, "unset", &actions, N_("remove a variable: name [value-pattern]"), ACTION_UNSET),
 154         OPT_BIT(0, "unset-all", &actions, N_("remove all matches: name [value-pattern]"), ACTION_UNSET_ALL),
 155         OPT_BIT(0, "rename-section", &actions, N_("rename section: old-name new-name"), ACTION_RENAME_SECTION),
 156         OPT_BIT(0, "remove-section", &actions, N_("remove a section: name"), ACTION_REMOVE_SECTION),
 157         OPT_BIT('l', "list", &actions, N_("list all"), ACTION_LIST),
 158         OPT_BOOL(0, "fixed-value", &fixed_value, N_("use string equality when comparing values to 'value-pattern'")),
 159         OPT_BIT('e', "edit", &actions, N_("open an editor"), ACTION_EDIT),
 160         OPT_BIT(0, "get-color", &actions, N_("find the color configured: slot [default]"), ACTION_GET_COLOR),
 161         OPT_BIT(0, "get-colorbool", &actions, N_("find the color setting: slot [stdout-is-tty]"), ACTION_GET_COLORBOOL),
 162         OPT_GROUP(N_("Type")),
 163         OPT_CALLBACK('t', "type", &type, N_("type"), N_("value is given this type"), option_parse_type),
 164         OPT_CALLBACK_VALUE(0, "bool", &type, N_("value is \"true\" or \"false\""), TYPE_BOOL),
 165         OPT_CALLBACK_VALUE(0, "int", &type, N_("value is decimal number"), TYPE_INT),
 166         OPT_CALLBACK_VALUE(0, "bool-or-int", &type, N_("value is --bool or --int"), TYPE_BOOL_OR_INT),
 167         OPT_CALLBACK_VALUE(0, "bool-or-str", &type, N_("value is --bool or string"), TYPE_BOOL_OR_STR),
 168         OPT_CALLBACK_VALUE(0, "path", &type, N_("value is a path (file or directory name)"), TYPE_PATH),
 169         OPT_CALLBACK_VALUE(0, "expiry-date", &type, N_("value is an expiry date"), TYPE_EXPIRY_DATE),
 170         OPT_GROUP(N_("Other")),
 171         OPT_BOOL('z', "null", &end_nul, N_("terminate values with NUL byte")),
 172         OPT_BOOL(0, "name-only", &omit_values, N_("show variable names only")),
 173         OPT_BOOL(0, "includes", &respect_includes_opt, N_("respect include directives on lookup")),
 174         OPT_BOOL(0, "show-origin", &show_origin, N_("show origin of config (file, standard input, blob, command line)")),
 175         OPT_BOOL(0, "show-scope", &show_scope, N_("show scope of config (worktree, local, global, system, command)")),
 176         OPT_STRING(0, "default", &default_value, N_("value"), N_("with --get, use default value when missing entry")),
 177         OPT_END(),
 178 };
 179
 180 static NORETURN void usage_builtin_config(void)
 181 {
 182         usage_with_options(builtin_config_usage, builtin_config_options);
 183 }
 184
 185 static void check_argc(int argc, int min, int max)
 186 {
 187         if (argc >= min && argc <= max)
 188                 return;
 189         if (min == max)
 190                 error(_("wrong number of arguments, should be %d"), min);
 191         else
 192                 error(_("wrong number of arguments, should be from %d to %d"),
 193                       min, max);
 194         usage_builtin_config();
 195 }
 196
 197 static void show_config_origin(struct strbuf *buf)
 198 {
 199         const char term = end_nul ? '\0' : '\t';
 200
 201         strbuf_addstr(buf, current_config_origin_type());
 202         strbuf_addch(buf, ':');
 203         if (end_nul)
 204                 strbuf_addstr(buf, current_config_name());
 205         else
 206                 quote_c_style(current_config_name(), buf, NULL, 0);
 207         strbuf_addch(buf, term);
 208 }
 209
 210 static void show_config_scope(struct strbuf *buf)
 211 {
 212         const char term = end_nul ? '\0' : '\t';
 213         const char *scope = config_scope_name(current_config_scope());
 214
 215         strbuf_addstr(buf, N_(scope));
 216         strbuf_addch(buf, term);
 217 }
 218
 219 static int show_all_config(const char *key_, const char *value_,
 220                            void *cb UNUSED)
 221 {
 222         if (show_origin || show_scope) {
 223                 struct strbuf buf = STRBUF_INIT;
 224                 if (show_scope)
 225                         show_config_scope(&buf);
 226                 if (show_origin)
 227                         show_config_origin(&buf);
 228                 /* Use fwrite as "buf" can contain \0's if "end_null" is set. */
 229                 fwrite(buf.buf, 1, buf.len, stdout);
 230                 strbuf_release(&buf);
 231         }
 232         if (!omit_values && value_)
 233                 printf("%s%c%s%c", key_, delim, value_, term);
 234         else
 235                 printf("%s%c", key_, term);
 236         return 0;
 237 }
 238
 239 struct strbuf_list {
 240         struct strbuf *items;
 241         int nr;
 242         int alloc;
 243 };
 244
 245 static int format_config(struct strbuf *buf, const char *key_, const char *value_)
 246 {
 247         if (show_scope)
 248                 show_config_scope(buf);
 249         if (show_origin)
 250                 show_config_origin(buf);
 251         if (show_keys)
 252                 strbuf_addstr(buf, key_);
 253         if (!omit_values) {
 254                 if (show_keys)
 255                         strbuf_addch(buf, key_delim);
 256
 257                 if (type == TYPE_INT)
 258                         strbuf_addf(buf, "%"PRId64,
 259                                     git_config_int64(key_, value_ ? value_ : ""));
 260                 else if (type == TYPE_BOOL)
 261                         strbuf_addstr(buf, git_config_bool(key_, value_) ?
 262                                       "true" : "false");
 263                 else if (type == TYPE_BOOL_OR_INT) {
 264                         int is_bool, v;
 265                         v = git_config_bool_or_int(key_, value_, &is_bool);
 266                         if (is_bool)
 267                                 strbuf_addstr(buf, v ? "true" : "false");
 268                         else
 269                                 strbuf_addf(buf, "%d", v);
 270                 } else if (type == TYPE_BOOL_OR_STR) {
 271                         int v = git_parse_maybe_bool(value_);
 272                         if (v < 0)
 273                                 strbuf_addstr(buf, value_);
 274                         else
 275                                 strbuf_addstr(buf, v ? "true" : "false");
 276                 } else if (type == TYPE_PATH) {
 277                         const char *v;
 278                         if (git_config_pathname(&v, key_, value_) < 0)
 279                                 return -1;
 280                         strbuf_addstr(buf, v);
 281                         free((char *)v);
 282                 } else if (type == TYPE_EXPIRY_DATE) {
 283                         timestamp_t t;
 284                         if (git_config_expiry_date(&t, key_, value_) < 0)
 285                                 return -1;
 286                         strbuf_addf(buf, "%"PRItime, t);
 287                 } else if (type == TYPE_COLOR) {
 288                         char v[COLOR_MAXLEN];
 289                         if (git_config_color(v, key_, value_) < 0)
 290                                 return -1;
 291                         strbuf_addstr(buf, v);
 292                 } else if (value_) {
 293                         strbuf_addstr(buf, value_);
 294                 } else {
 295                         /* Just show the key name; back out delimiter */
 296                         if (show_keys)
 297                                 strbuf_setlen(buf, buf->len - 1);
 298                 }
 299         }
 300         strbuf_addch(buf, term);
 301         return 0;
 302 }
 303
 304 static int collect_config(const char *key_, const char *value_, void *cb)
 305 {
 306         struct strbuf_list *values = cb;
 307
 308         if (!use_key_regexp && strcmp(key_, key))
 309                 return 0;
 310         if (use_key_regexp && regexec(key_regexp, key_, 0, NULL, 0))
 311                 return 0;
 312         if (fixed_value && strcmp(value_pattern, (value_?value_:"")))
 313                 return 0;
 314         if (regexp != NULL &&
 315             (do_not_match ^ !!regexec(regexp, (value_?value_:""), 0, NULL, 0)))
 316                 return 0;
 317
 318         ALLOC_GROW(values->items, values->nr + 1, values->alloc);
 319         strbuf_init(&values->items[values->nr], 0);
 320
 321         return format_config(&values->items[values->nr++], key_, value_);
 322 }
 323
 324 static int get_value(const char *key_, const char *regex_, unsigned flags)
 325 {
 326         int ret = CONFIG_GENERIC_ERROR;
 327         struct strbuf_list values = {NULL};
 328         int i;
 329
 330         if (use_key_regexp) {
 331                 char *tl;
 332
 333                 /*
 334                  * NEEDSWORK: this naive pattern lowercasing obviously does not
 335                  * work for more complex patterns like "^[^.]*Foo.*bar".
 336                  * Perhaps we should deprecate this altogether someday.
 337                  */
 338
 339                 key = xstrdup(key_);
 340                 for (tl = key + strlen(key) - 1;
 341                      tl >= key && *tl != '.';
 342                      tl--)
 343                         *tl = tolower(*tl);
 344                 for (tl = key; *tl && *tl != '.'; tl++)
 345                         *tl = tolower(*tl);
 346
 347                 key_regexp = (regex_t*)xmalloc(sizeof(regex_t));
 348                 if (regcomp(key_regexp, key, REG_EXTENDED)) {
 349                         error(_("invalid key pattern: %s"), key_);
 350                         FREE_AND_NULL(key_regexp);
 351                         ret = CONFIG_INVALID_PATTERN;
 352                         goto free_strings;
 353                 }
 354         } else {
 355                 if (git_config_parse_key(key_, &key, NULL)) {
 356                         ret = CONFIG_INVALID_KEY;
 357                         goto free_strings;
 358                 }
 359         }
 360
 361         if (regex_ && (flags & CONFIG_FLAGS_FIXED_VALUE))
 362                 value_pattern = regex_;
 363         else if (regex_) {
 364                 if (regex_[0] == '!') {
 365                         do_not_match = 1;
 366                         regex_++;
 367                 }
 368
 369                 regexp = (regex_t*)xmalloc(sizeof(regex_t));
 370                 if (regcomp(regexp, regex_, REG_EXTENDED)) {
 371                         error(_("invalid pattern: %s"), regex_);
 372                         FREE_AND_NULL(regexp);
 373                         ret = CONFIG_INVALID_PATTERN;
 374                         goto free_strings;
 375                 }
 376         }
 377
 378         config_with_options(collect_config, &values,
 379                             &given_config_source, the_repository,
 380                             &config_options);
 381
 382         if (!values.nr && default_value) {
 383                 struct strbuf *item;
 384                 ALLOC_GROW(values.items, values.nr + 1, values.alloc);
 385                 item = &values.items[values.nr++];
 386                 strbuf_init(item, 0);
 387                 if (format_config(item, key_, default_value) < 0)
 388                         die(_("failed to format default config value: %s"),
 389                                 default_value);
 390         }
 391
 392         ret = !values.nr;
 393
 394         for (i = 0; i < values.nr; i++) {
 395                 struct strbuf *buf = values.items + i;
 396                 if (do_all || i == values.nr - 1)
 397                         fwrite(buf->buf, 1, buf->len, stdout);
 398                 strbuf_release(buf);
 399         }
 400         free(values.items);
 401
 402 free_strings:
 403         free(key);
 404         if (key_regexp) {
 405                 regfree(key_regexp);
 406                 free(key_regexp);
 407         }
 408         if (regexp) {
 409                 regfree(regexp);
 410                 free(regexp);
 411         }
 412
 413         return ret;
 414 }
 415
 416 static char *normalize_value(const char *key, const char *value)
 417 {
 418         if (!value)
 419                 return NULL;
 420
 421         if (type == 0 || type == TYPE_PATH || type == TYPE_EXPIRY_DATE)
 422                 /*
 423                  * We don't do normalization for TYPE_PATH here: If
 424                  * the path is like ~/foobar/, we prefer to store
 425                  * "~/foobar/" in the config file, and to expand the ~
 426                  * when retrieving the value.
 427                  * Also don't do normalization for expiry dates.
 428                  */
 429                 return xstrdup(value);
 430         if (type == TYPE_INT)
 431                 return xstrfmt("%"PRId64, git_config_int64(key, value));
 432         if (type == TYPE_BOOL)
 433                 return xstrdup(git_config_bool(key, value) ?  "true" : "false");
 434         if (type == TYPE_BOOL_OR_INT) {
 435                 int is_bool, v;
 436                 v = git_config_bool_or_int(key, value, &is_bool);
 437                 if (!is_bool)
 438                         return xstrfmt("%d", v);
 439                 else
 440                         return xstrdup(v ? "true" : "false");
 441         }
 442         if (type == TYPE_BOOL_OR_STR) {
 443                 int v = git_parse_maybe_bool(value);
 444                 if (v < 0)
 445                         return xstrdup(value);
 446                 else
 447                         return xstrdup(v ? "true" : "false");
 448         }
 449         if (type == TYPE_COLOR) {
 450                 char v[COLOR_MAXLEN];
 451                 if (git_config_color(v, key, value))
 452                         die(_("cannot parse color '%s'"), value);
 453
 454                 /*
 455                  * The contents of `v` now contain an ANSI escape
 456                  * sequence, not suitable for including within a
 457                  * configuration file. Treat the above as a
 458                  * "sanity-check", and return the given value, which we
 459                  * know is representable as valid color code.
 460                  */
 461                 return xstrdup(value);
 462         }
 463
 464         BUG("cannot normalize type %d", type);
 465 }
 466
 467 static int get_color_found;
 468 static const char *get_color_slot;
 469 static const char *get_colorbool_slot;
 470 static char parsed_color[COLOR_MAXLEN];
 471
 472 static int git_get_color_config(const char *var, const char *value,
 473                                 void *cb UNUSED)
 474 {
 475         if (!strcmp(var, get_color_slot)) {
 476                 if (!value)
 477                         config_error_nonbool(var);
 478                 if (color_parse(value, parsed_color) < 0)
 479                         return -1;
 480                 get_color_found = 1;
 481         }
 482         return 0;
 483 }
 484
 485 static void get_color(const char *var, const char *def_color)
 486 {
 487         get_color_slot = var;
 488         get_color_found = 0;
 489         parsed_color[0] = '\0';
 490         config_with_options(git_get_color_config, NULL,
 491                             &given_config_source, the_repository,
 492                             &config_options);
 493
 494         if (!get_color_found && def_color) {
 495                 if (color_parse(def_color, parsed_color) < 0)
 496                         die(_("unable to parse default color value"));
 497         }
 498
 499         fputs(parsed_color, stdout);
 500 }
 501
 502 static int get_colorbool_found;
 503 static int get_diff_color_found;
 504 static int get_color_ui_found;
 505 static int git_get_colorbool_config(const char *var, const char *value,
 506                                     void *data UNUSED)
 507 {
 508         if (!strcmp(var, get_colorbool_slot))
 509                 get_colorbool_found = git_config_colorbool(var, value);
 510         else if (!strcmp(var, "diff.color"))
 511                 get_diff_color_found = git_config_colorbool(var, value);
 512         else if (!strcmp(var, "color.ui"))
 513                 get_color_ui_found = git_config_colorbool(var, value);
 514         return 0;
 515 }
 516
 517 static int get_colorbool(const char *var, int print)
 518 {
 519         get_colorbool_slot = var;
 520         get_colorbool_found = -1;
 521         get_diff_color_found = -1;
 522         get_color_ui_found = -1;
 523         config_with_options(git_get_colorbool_config, NULL,
 524                             &given_config_source, the_repository,
 525                             &config_options);
 526
 527         if (get_colorbool_found < 0) {
 528                 if (!strcmp(get_colorbool_slot, "color.diff"))
 529                         get_colorbool_found = get_diff_color_found;
 530                 if (get_colorbool_found < 0)
 531                         get_colorbool_found = get_color_ui_found;
 532         }
 533
 534         if (get_colorbool_found < 0)
 535                 /* default value if none found in config */
 536                 get_colorbool_found = GIT_COLOR_AUTO;
 537
 538         get_colorbool_found = want_color(get_colorbool_found);
 539
 540         if (print) {
 541                 printf("%s\n", get_colorbool_found ? "true" : "false");
 542                 return 0;
 543         } else
 544                 return get_colorbool_found ? 0 : 1;
 545 }
 546
 547 static void check_write(void)
 548 {
 549         if (!given_config_source.file && !startup_info->have_repository)
 550                 die(_("not in a git directory"));
 551
 552         if (given_config_source.use_stdin)
 553                 die(_("writing to stdin is not supported"));
 554
 555         if (given_config_source.blob)
 556                 die(_("writing config blobs is not supported"));
 557 }
 558
 559 struct urlmatch_current_candidate_value {
 560         char value_is_null;
 561         struct strbuf value;
 562 };
 563
 564 static int urlmatch_collect_fn(const char *var, const char *value, void *cb)
 565 {
 566         struct string_list *values = cb;
 567         struct string_list_item *item = string_list_insert(values, var);
 568         struct urlmatch_current_candidate_value *matched = item->util;
 569
 570         if (!matched) {
 571                 matched = xmalloc(sizeof(*matched));
 572                 strbuf_init(&matched->value, 0);
 573                 item->util = matched;
 574         } else {
 575                 strbuf_reset(&matched->value);
 576         }
 577
 578         if (value) {
 579                 strbuf_addstr(&matched->value, value);
 580                 matched->value_is_null = 0;
 581         } else {
 582                 matched->value_is_null = 1;
 583         }
 584         return 0;
 585 }
 586
 587 static int get_urlmatch(const char *var, const char *url)
 588 {
 589         int ret;
 590         char *section_tail;
 591         struct string_list_item *item;
 592         struct urlmatch_config config = URLMATCH_CONFIG_INIT;
 593         struct string_list values = STRING_LIST_INIT_DUP;
 594
 595         config.collect_fn = urlmatch_collect_fn;
 596         config.cascade_fn = NULL;
 597         config.cb = &values;
 598
 599         if (!url_normalize(url, &config.url))
 600                 die("%s", config.url.err);
 601
 602         config.section = xstrdup_tolower(var);
 603         section_tail = strchr(config.section, '.');
 604         if (section_tail) {
 605                 *section_tail = '\0';
 606                 config.key = section_tail + 1;
 607                 show_keys = 0;
 608         } else {
 609                 config.key = NULL;
 610                 show_keys = 1;
 611         }
 612
 613         config_with_options(urlmatch_config_entry, &config,
 614                             &given_config_source, the_repository,
 615                             &config_options);
 616
 617         ret = !values.nr;
 618
 619         for_each_string_list_item(item, &values) {
 620                 struct urlmatch_current_candidate_value *matched = item->util;
 621                 struct strbuf buf = STRBUF_INIT;
 622
 623                 format_config(&buf, item->string,
 624                               matched->value_is_null ? NULL : matched->value.buf);
 625                 fwrite(buf.buf, 1, buf.len, stdout);
 626                 strbuf_release(&buf);
 627
 628                 strbuf_release(&matched->value);
 629         }
 630         urlmatch_config_release(&config);
 631         string_list_clear(&values, 1);
 632         free(config.url.url);
 633
 634         free((void *)config.section);
 635         return ret;
 636 }
 637
 638 static char *default_user_config(void)
 639 {
 640         struct strbuf buf = STRBUF_INIT;
 641         strbuf_addf(&buf,
 642                     _("# This is Git's per-user configuration file.\n"
 643                       "[user]\n"
 644                       "# Please adapt and uncomment the following lines:\n"
 645                       "#        name = %s\n"
 646                       "#        email = %s\n"),
 647                     ident_default_name(),
 648                     ident_default_email());
 649         return strbuf_detach(&buf, NULL);
 650 }
 651
 652 int cmd_config(int argc, const char **argv, const char *prefix)
 653 {
 654         int nongit = !startup_info->have_repository;
 655         char *value = NULL;
 656         int flags = 0;
 657         int ret = 0;
 658
 659         given_config_source.file = xstrdup_or_null(getenv(CONFIG_ENVIRONMENT));
 660
 661         argc = parse_options(argc, argv, prefix, builtin_config_options,
 662                              builtin_config_usage,
 663                              PARSE_OPT_STOP_AT_NON_OPTION);
 664
 665         if (use_global_config + use_system_config + use_local_config +
 666             use_worktree_config +
 667             !!given_config_source.file + !!given_config_source.blob > 1) {
 668                 error(_("only one config file at a time"));
 669                 usage_builtin_config();
 670         }
 671
 672         if (nongit) {
 673                 if (use_local_config)
 674                         die(_("--local can only be used inside a git repository"));
 675                 if (given_config_source.blob)
 676                         die(_("--blob can only be used inside a git repository"));
 677                 if (use_worktree_config)
 678                         die(_("--worktree can only be used inside a git repository"));
 679
 680         }
 681
 682         if (given_config_source.file &&
 683                         !strcmp(given_config_source.file, "-")) {
 684                 given_config_source.file = NULL;
 685                 given_config_source.use_stdin = 1;
 686                 given_config_source.scope = CONFIG_SCOPE_COMMAND;
 687         }
 688
 689         if (use_global_config) {
 690                 char *user_config, *xdg_config;
 691
 692                 git_global_config(&user_config, &xdg_config);
 693                 if (!user_config)
 694                         /*
 695                          * It is unknown if HOME/.gitconfig exists, so
 696                          * we do not know if we should write to XDG
 697                          * location; error out even if XDG_CONFIG_HOME
 698                          * is set and points at a sane location.
 699                          */
 700                         die(_("$HOME not set"));
 701
 702                 given_config_source.scope = CONFIG_SCOPE_GLOBAL;
 703
 704                 if (access_or_warn(user_config, R_OK, 0) &&
 705                     xdg_config && !access_or_warn(xdg_config, R_OK, 0)) {
 706                         given_config_source.file = xdg_config;
 707                         free(user_config);
 708                 } else {
 709                         given_config_source.file = user_config;
 710                         free(xdg_config);
 711                 }
 712         }
 713         else if (use_system_config) {
 714                 given_config_source.file = git_system_config();
 715                 given_config_source.scope = CONFIG_SCOPE_SYSTEM;
 716         } else if (use_local_config) {
 717                 given_config_source.file = git_pathdup("config");
 718                 given_config_source.scope = CONFIG_SCOPE_LOCAL;
 719         } else if (use_worktree_config) {
 720                 struct worktree **worktrees = get_worktrees();
 721                 if (the_repository->repository_format_worktree_config)
 722                         given_config_source.file = git_pathdup("config.worktree");
 723                 else if (worktrees[0] && worktrees[1])
 724                         die(_("--worktree cannot be used with multiple "
 725                               "working trees unless the config\n"
 726                               "extension worktreeConfig is enabled. "
 727                               "Please read \"CONFIGURATION FILE\"\n"
 728                               "section in \"git help worktree\" for details"));
 729                 else
 730                         given_config_source.file = git_pathdup("config");
 731                 given_config_source.scope = CONFIG_SCOPE_LOCAL;
 732                 free_worktrees(worktrees);
 733         } else if (given_config_source.file) {
 734                 if (!is_absolute_path(given_config_source.file) && prefix)
 735                         given_config_source.file =
 736                                 prefix_filename(prefix, given_config_source.file);
 737                 given_config_source.scope = CONFIG_SCOPE_COMMAND;
 738         } else if (given_config_source.blob) {
 739                 given_config_source.scope = CONFIG_SCOPE_COMMAND;
 740         }
 741
 742
 743         if (respect_includes_opt == -1)
 744                 config_options.respect_includes = !given_config_source.file;
 745         else
 746                 config_options.respect_includes = respect_includes_opt;
 747         if (!nongit) {
 748                 config_options.commondir = get_git_common_dir();
 749                 config_options.git_dir = get_git_dir();
 750         }
 751
 752         if (end_nul) {
 753                 term = '\0';
 754                 delim = '\n';
 755                 key_delim = '\n';
 756         }
 757
 758         if ((actions & (ACTION_GET_COLOR|ACTION_GET_COLORBOOL)) && type) {
 759                 error(_("--get-color and variable type are incoherent"));
 760                 usage_builtin_config();
 761         }
 762
 763         if (HAS_MULTI_BITS(actions)) {
 764                 error(_("only one action at a time"));
 765                 usage_builtin_config();
 766         }
 767         if (actions == 0)
 768                 switch (argc) {
 769                 case 1: actions = ACTION_GET; break;
 770                 case 2: actions = ACTION_SET; break;
 771                 case 3: actions = ACTION_SET_ALL; break;
 772                 default:
 773                         usage_builtin_config();
 774                 }
 775         if (omit_values &&
 776             !(actions == ACTION_LIST || actions == ACTION_GET_REGEXP)) {
 777                 error(_("--name-only is only applicable to --list or --get-regexp"));
 778                 usage_builtin_config();
 779         }
 780
 781         if (show_origin && !(actions &
 782                 (ACTION_GET|ACTION_GET_ALL|ACTION_GET_REGEXP|ACTION_LIST))) {
 783                 error(_("--show-origin is only applicable to --get, --get-all, "
 784                         "--get-regexp, and --list"));
 785                 usage_builtin_config();
 786         }
 787
 788         if (default_value && !(actions & ACTION_GET)) {
 789                 error(_("--default is only applicable to --get"));
 790                 usage_builtin_config();
 791         }
 792
 793         /* check usage of --fixed-value */
 794         if (fixed_value) {
 795                 int allowed_usage = 0;
 796
 797                 switch (actions) {
 798                 /* git config --get <name> <value-pattern> */
 799                 case ACTION_GET:
 800                 /* git config --get-all <name> <value-pattern> */
 801                 case ACTION_GET_ALL:
 802                 /* git config --get-regexp <name-pattern> <value-pattern> */
 803                 case ACTION_GET_REGEXP:
 804                 /* git config --unset <name> <value-pattern> */
 805                 case ACTION_UNSET:
 806                 /* git config --unset-all <name> <value-pattern> */
 807                 case ACTION_UNSET_ALL:
 808                         allowed_usage = argc > 1 && !!argv[1];
 809                         break;
 810
 811                 /* git config <name> <value> <value-pattern> */
 812                 case ACTION_SET_ALL:
 813                 /* git config --replace-all <name> <value> <value-pattern> */
 814                 case ACTION_REPLACE_ALL:
 815                         allowed_usage = argc > 2 && !!argv[2];
 816                         break;
 817
 818                 /* other options don't allow --fixed-value */
 819                 }
 820
 821                 if (!allowed_usage) {
 822                         error(_("--fixed-value only applies with 'value-pattern'"));
 823                         usage_builtin_config();
 824                 }
 825
 826                 flags |= CONFIG_FLAGS_FIXED_VALUE;
 827         }
 828
 829         if (actions & PAGING_ACTIONS)
 830                 setup_auto_pager("config", 1);
 831
 832         if (actions == ACTION_LIST) {
 833                 check_argc(argc, 0, 0);
 834                 if (config_with_options(show_all_config, NULL,
 835                                         &given_config_source, the_repository,
 836                                         &config_options) < 0) {
 837                         if (given_config_source.file)
 838                                 die_errno(_("unable to read config file '%s'"),
 839                                           given_config_source.file);
 840                         else
 841                                 die(_("error processing config file(s)"));
 842                 }
 843         }
 844         else if (actions == ACTION_EDIT) {
 845                 char *config_file;
 846
 847                 check_argc(argc, 0, 0);
 848                 if (!given_config_source.file && nongit)
 849                         die(_("not in a git directory"));
 850                 if (given_config_source.use_stdin)
 851                         die(_("editing stdin is not supported"));
 852                 if (given_config_source.blob)
 853                         die(_("editing blobs is not supported"));
 854                 git_config(git_default_config, NULL);
 855                 config_file = given_config_source.file ?
 856                                 xstrdup(given_config_source.file) :
 857                                 git_pathdup("config");
 858                 if (use_global_config) {
 859                         int fd = open(config_file, O_CREAT | O_EXCL | O_WRONLY, 0666);
 860                         if (fd >= 0) {
 861                                 char *content = default_user_config();
 862                                 write_str_in_full(fd, content);
 863                                 free(content);
 864                                 close(fd);
 865                         }
 866                         else if (errno != EEXIST)
 867                                 die_errno(_("cannot create configuration file %s"), config_file);
 868                 }
 869                 launch_editor(config_file, NULL, NULL);
 870                 free(config_file);
 871         }
 872         else if (actions == ACTION_SET) {
 873                 check_write();
 874                 check_argc(argc, 2, 2);
 875                 value = normalize_value(argv[0], argv[1]);
 876                 ret = git_config_set_in_file_gently(given_config_source.file, argv[0], value);
 877                 if (ret == CONFIG_NOTHING_SET)
 878                         error(_("cannot overwrite multiple values with a single value\n"
 879                         "       Use a regexp, --add or --replace-all to change %s."), argv[0]);
 880         }
 881         else if (actions == ACTION_SET_ALL) {
 882                 check_write();
 883                 check_argc(argc, 2, 3);
 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, argv[2],
 887                                                              flags);
 888         }
 889         else if (actions == ACTION_ADD) {
 890                 check_write();
 891                 check_argc(argc, 2, 2);
 892                 value = normalize_value(argv[0], argv[1]);
 893                 ret = git_config_set_multivar_in_file_gently(given_config_source.file,
 894                                                              argv[0], value,
 895                                                              CONFIG_REGEX_NONE,
 896                                                              flags);
 897         }
 898         else if (actions == ACTION_REPLACE_ALL) {
 899                 check_write();
 900                 check_argc(argc, 2, 3);
 901                 value = normalize_value(argv[0], argv[1]);
 902                 ret = git_config_set_multivar_in_file_gently(given_config_source.file,
 903                                                              argv[0], value, argv[2],
 904                                                              flags | CONFIG_FLAGS_MULTI_REPLACE);
 905         }
 906         else if (actions == ACTION_GET) {
 907                 check_argc(argc, 1, 2);
 908                 return get_value(argv[0], argv[1], flags);
 909         }
 910         else if (actions == ACTION_GET_ALL) {
 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_REGEXP) {
 916                 show_keys = 1;
 917                 use_key_regexp = 1;
 918                 do_all = 1;
 919                 check_argc(argc, 1, 2);
 920                 return get_value(argv[0], argv[1], flags);
 921         }
 922         else if (actions == ACTION_GET_URLMATCH) {
 923                 check_argc(argc, 2, 2);
 924                 return get_urlmatch(argv[0], argv[1]);
 925         }
 926         else if (actions == ACTION_UNSET) {
 927                 check_write();
 928                 check_argc(argc, 1, 2);
 929                 if (argc == 2)
 930                         return git_config_set_multivar_in_file_gently(given_config_source.file,
 931                                                                       argv[0], NULL, argv[1],
 932                                                                       flags);
 933                 else
 934                         return git_config_set_in_file_gently(given_config_source.file,
 935                                                              argv[0], NULL);
 936         }
 937         else if (actions == ACTION_UNSET_ALL) {
 938                 check_write();
 939                 check_argc(argc, 1, 2);
 940                 return git_config_set_multivar_in_file_gently(given_config_source.file,
 941                                                               argv[0], NULL, argv[1],
 942                                                               flags | CONFIG_FLAGS_MULTI_REPLACE);
 943         }
 944         else if (actions == ACTION_RENAME_SECTION) {
 945                 check_write();
 946                 check_argc(argc, 2, 2);
 947                 ret = git_config_rename_section_in_file(given_config_source.file,
 948                                                         argv[0], argv[1]);
 949                 if (ret < 0)
 950                         return ret;
 951                 else if (!ret)
 952                         die(_("no such section: %s"), argv[0]);
 953                 else
 954                         ret = 0;
 955         }
 956         else if (actions == ACTION_REMOVE_SECTION) {
 957                 check_write();
 958                 check_argc(argc, 1, 1);
 959                 ret = git_config_rename_section_in_file(given_config_source.file,
 960                                                         argv[0], NULL);
 961                 if (ret < 0)
 962                         return ret;
 963                 else if (!ret)
 964                         die(_("no such section: %s"), argv[0]);
 965                 else
 966                         ret = 0;
 967         }
 968         else if (actions == ACTION_GET_COLOR) {
 969                 check_argc(argc, 1, 2);
 970                 get_color(argv[0], argv[1]);
 971         }
 972         else if (actions == ACTION_GET_COLORBOOL) {
 973                 check_argc(argc, 1, 2);
 974                 if (argc == 2)
 975                         color_stdout_is_tty = git_config_bool("command line", argv[1]);
 976                 return get_colorbool(argv[0], argc == 2);
 977         }
 978
 979         free(value);
 980         return ret;
 981 }