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 static const char *comment;
  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_STRING(0, "comment", &comment, N_("value"), N_("human-readable comment string (# will be prepended as needed)")),
 178         OPT_END(),
 179 };
 180
 181 static NORETURN void usage_builtin_config(void)
 182 {
 183         usage_with_options(builtin_config_usage, builtin_config_options);
 184 }
 185
 186 static void check_argc(int argc, int min, int max)
 187 {
 188         if (argc >= min && argc <= max)
 189                 return;
 190         if (min == max)
 191                 error(_("wrong number of arguments, should be %d"), min);
 192         else
 193                 error(_("wrong number of arguments, should be from %d to %d"),
 194                       min, max);
 195         usage_builtin_config();
 196 }
 197
 198 static void show_config_origin(const struct key_value_info *kvi,
 199                                struct strbuf *buf)
 200 {
 201         const char term = end_nul ? '\0' : '\t';
 202
 203         strbuf_addstr(buf, config_origin_type_name(kvi->origin_type));
 204         strbuf_addch(buf, ':');
 205         if (end_nul)
 206                 strbuf_addstr(buf, kvi->filename ? kvi->filename : "");
 207         else
 208                 quote_c_style(kvi->filename ? kvi->filename : "", buf, NULL, 0);
 209         strbuf_addch(buf, term);
 210 }
 211
 212 static void show_config_scope(const struct key_value_info *kvi,
 213                               struct strbuf *buf)
 214 {
 215         const char term = end_nul ? '\0' : '\t';
 216         const char *scope = config_scope_name(kvi->scope);
 217
 218         strbuf_addstr(buf, N_(scope));
 219         strbuf_addch(buf, term);
 220 }
 221
 222 static int show_all_config(const char *key_, const char *value_,
 223                            const struct config_context *ctx,
 224                            void *cb UNUSED)
 225 {
 226         const struct key_value_info *kvi = ctx->kvi;
 227
 228         if (show_origin || show_scope) {
 229                 struct strbuf buf = STRBUF_INIT;
 230                 if (show_scope)
 231                         show_config_scope(kvi, &buf);
 232                 if (show_origin)
 233                         show_config_origin(kvi, &buf);
 234                 /* Use fwrite as "buf" can contain \0's if "end_null" is set. */
 235                 fwrite(buf.buf, 1, buf.len, stdout);
 236                 strbuf_release(&buf);
 237         }
 238         if (!omit_values && value_)
 239                 printf("%s%c%s%c", key_, delim, value_, term);
 240         else
 241                 printf("%s%c", key_, term);
 242         return 0;
 243 }
 244
 245 struct strbuf_list {
 246         struct strbuf *items;
 247         int nr;
 248         int alloc;
 249 };
 250
 251 static int format_config(struct strbuf *buf, const char *key_,
 252                          const char *value_, const struct key_value_info *kvi)
 253 {
 254         if (show_scope)
 255                 show_config_scope(kvi, buf);
 256         if (show_origin)
 257                 show_config_origin(kvi, buf);
 258         if (show_keys)
 259                 strbuf_addstr(buf, key_);
 260         if (!omit_values) {
 261                 if (show_keys)
 262                         strbuf_addch(buf, key_delim);
 263
 264                 if (type == TYPE_INT)
 265                         strbuf_addf(buf, "%"PRId64,
 266                                     git_config_int64(key_, value_ ? value_ : "", kvi));
 267                 else if (type == TYPE_BOOL)
 268                         strbuf_addstr(buf, git_config_bool(key_, value_) ?
 269                                       "true" : "false");
 270                 else if (type == TYPE_BOOL_OR_INT) {
 271                         int is_bool, v;
 272                         v = git_config_bool_or_int(key_, value_, kvi,
 273                                                    &is_bool);
 274                         if (is_bool)
 275                                 strbuf_addstr(buf, v ? "true" : "false");
 276                         else
 277                                 strbuf_addf(buf, "%d", v);
 278                 } else if (type == TYPE_BOOL_OR_STR) {
 279                         int v = git_parse_maybe_bool(value_);
 280                         if (v < 0)
 281                                 strbuf_addstr(buf, value_);
 282                         else
 283                                 strbuf_addstr(buf, v ? "true" : "false");
 284                 } else if (type == TYPE_PATH) {
 285                         const char *v;
 286                         if (git_config_pathname(&v, key_, value_) < 0)
 287                                 return -1;
 288                         strbuf_addstr(buf, v);
 289                         free((char *)v);
 290                 } else if (type == TYPE_EXPIRY_DATE) {
 291                         timestamp_t t;
 292                         if (git_config_expiry_date(&t, key_, value_) < 0)
 293                                 return -1;
 294                         strbuf_addf(buf, "%"PRItime, t);
 295                 } else if (type == TYPE_COLOR) {
 296                         char v[COLOR_MAXLEN];
 297                         if (git_config_color(v, key_, value_) < 0)
 298                                 return -1;
 299                         strbuf_addstr(buf, v);
 300                 } else if (value_) {
 301                         strbuf_addstr(buf, value_);
 302                 } else {
 303                         /* Just show the key name; back out delimiter */
 304                         if (show_keys)
 305                                 strbuf_setlen(buf, buf->len - 1);
 306                 }
 307         }
 308         strbuf_addch(buf, term);
 309         return 0;
 310 }
 311
 312 static int collect_config(const char *key_, const char *value_,
 313                           const struct config_context *ctx, void *cb)
 314 {
 315         struct strbuf_list *values = cb;
 316         const struct key_value_info *kvi = ctx->kvi;
 317
 318         if (!use_key_regexp && strcmp(key_, key))
 319                 return 0;
 320         if (use_key_regexp && regexec(key_regexp, key_, 0, NULL, 0))
 321                 return 0;
 322         if (fixed_value && strcmp(value_pattern, (value_?value_:"")))
 323                 return 0;
 324         if (regexp != NULL &&
 325             (do_not_match ^ !!regexec(regexp, (value_?value_:""), 0, NULL, 0)))
 326                 return 0;
 327
 328         ALLOC_GROW(values->items, values->nr + 1, values->alloc);
 329         strbuf_init(&values->items[values->nr], 0);
 330
 331         return format_config(&values->items[values->nr++], key_, value_, kvi);
 332 }
 333
 334 static int get_value(const char *key_, const char *regex_, unsigned flags)
 335 {
 336         int ret = CONFIG_GENERIC_ERROR;
 337         struct strbuf_list values = {NULL};
 338         int i;
 339
 340         if (use_key_regexp) {
 341                 char *tl;
 342
 343                 /*
 344                  * NEEDSWORK: this naive pattern lowercasing obviously does not
 345                  * work for more complex patterns like "^[^.]*Foo.*bar".
 346                  * Perhaps we should deprecate this altogether someday.
 347                  */
 348
 349                 key = xstrdup(key_);
 350                 for (tl = key + strlen(key) - 1;
 351                      tl >= key && *tl != '.';
 352                      tl--)
 353                         *tl = tolower(*tl);
 354                 for (tl = key; *tl && *tl != '.'; tl++)
 355                         *tl = tolower(*tl);
 356
 357                 key_regexp = (regex_t*)xmalloc(sizeof(regex_t));
 358                 if (regcomp(key_regexp, key, REG_EXTENDED)) {
 359                         error(_("invalid key pattern: %s"), key_);
 360                         FREE_AND_NULL(key_regexp);
 361                         ret = CONFIG_INVALID_PATTERN;
 362                         goto free_strings;
 363                 }
 364         } else {
 365                 if (git_config_parse_key(key_, &key, NULL)) {
 366                         ret = CONFIG_INVALID_KEY;
 367                         goto free_strings;
 368                 }
 369         }
 370
 371         if (regex_ && (flags & CONFIG_FLAGS_FIXED_VALUE))
 372                 value_pattern = regex_;
 373         else if (regex_) {
 374                 if (regex_[0] == '!') {
 375                         do_not_match = 1;
 376                         regex_++;
 377                 }
 378
 379                 regexp = (regex_t*)xmalloc(sizeof(regex_t));
 380                 if (regcomp(regexp, regex_, REG_EXTENDED)) {
 381                         error(_("invalid pattern: %s"), regex_);
 382                         FREE_AND_NULL(regexp);
 383                         ret = CONFIG_INVALID_PATTERN;
 384                         goto free_strings;
 385                 }
 386         }
 387
 388         config_with_options(collect_config, &values,
 389                             &given_config_source, the_repository,
 390                             &config_options);
 391
 392         if (!values.nr && default_value) {
 393                 struct key_value_info kvi = KVI_INIT;
 394                 struct strbuf *item;
 395
 396                 kvi_from_param(&kvi);
 397                 ALLOC_GROW(values.items, values.nr + 1, values.alloc);
 398                 item = &values.items[values.nr++];
 399                 strbuf_init(item, 0);
 400                 if (format_config(item, key_, default_value, &kvi) < 0)
 401                         die(_("failed to format default config value: %s"),
 402                                 default_value);
 403         }
 404
 405         ret = !values.nr;
 406
 407         for (i = 0; i < values.nr; i++) {
 408                 struct strbuf *buf = values.items + i;
 409                 if (do_all || i == values.nr - 1)
 410                         fwrite(buf->buf, 1, buf->len, stdout);
 411                 strbuf_release(buf);
 412         }
 413         free(values.items);
 414
 415 free_strings:
 416         free(key);
 417         if (key_regexp) {
 418                 regfree(key_regexp);
 419                 free(key_regexp);
 420         }
 421         if (regexp) {
 422                 regfree(regexp);
 423                 free(regexp);
 424         }
 425
 426         return ret;
 427 }
 428
 429 static char *normalize_value(const char *key, const char *value,
 430                              struct key_value_info *kvi)
 431 {
 432         if (!value)
 433                 return NULL;
 434
 435         if (type == 0 || type == TYPE_PATH || type == TYPE_EXPIRY_DATE)
 436                 /*
 437                  * We don't do normalization for TYPE_PATH here: If
 438                  * the path is like ~/foobar/, we prefer to store
 439                  * "~/foobar/" in the config file, and to expand the ~
 440                  * when retrieving the value.
 441                  * Also don't do normalization for expiry dates.
 442                  */
 443                 return xstrdup(value);
 444         if (type == TYPE_INT)
 445                 return xstrfmt("%"PRId64, git_config_int64(key, value, kvi));
 446         if (type == TYPE_BOOL)
 447                 return xstrdup(git_config_bool(key, value) ?  "true" : "false");
 448         if (type == TYPE_BOOL_OR_INT) {
 449                 int is_bool, v;
 450                 v = git_config_bool_or_int(key, value, kvi, &is_bool);
 451                 if (!is_bool)
 452                         return xstrfmt("%d", v);
 453                 else
 454                         return xstrdup(v ? "true" : "false");
 455         }
 456         if (type == TYPE_BOOL_OR_STR) {
 457                 int v = git_parse_maybe_bool(value);
 458                 if (v < 0)
 459                         return xstrdup(value);
 460                 else
 461                         return xstrdup(v ? "true" : "false");
 462         }
 463         if (type == TYPE_COLOR) {
 464                 char v[COLOR_MAXLEN];
 465                 if (git_config_color(v, key, value))
 466                         die(_("cannot parse color '%s'"), value);
 467
 468                 /*
 469                  * The contents of `v` now contain an ANSI escape
 470                  * sequence, not suitable for including within a
 471                  * configuration file. Treat the above as a
 472                  * "sanity-check", and return the given value, which we
 473                  * know is representable as valid color code.
 474                  */
 475                 return xstrdup(value);
 476         }
 477
 478         BUG("cannot normalize type %d", type);
 479 }
 480
 481 static int get_color_found;
 482 static const char *get_color_slot;
 483 static const char *get_colorbool_slot;
 484 static char parsed_color[COLOR_MAXLEN];
 485
 486 static int git_get_color_config(const char *var, const char *value,
 487                                 const struct config_context *ctx UNUSED,
 488                                 void *cb UNUSED)
 489 {
 490         if (!strcmp(var, get_color_slot)) {
 491                 if (!value)
 492                         config_error_nonbool(var);
 493                 if (color_parse(value, parsed_color) < 0)
 494                         return -1;
 495                 get_color_found = 1;
 496         }
 497         return 0;
 498 }
 499
 500 static void get_color(const char *var, const char *def_color)
 501 {
 502         get_color_slot = var;
 503         get_color_found = 0;
 504         parsed_color[0] = '\0';
 505         config_with_options(git_get_color_config, NULL,
 506                             &given_config_source, the_repository,
 507                             &config_options);
 508
 509         if (!get_color_found && def_color) {
 510                 if (color_parse(def_color, parsed_color) < 0)
 511                         die(_("unable to parse default color value"));
 512         }
 513
 514         fputs(parsed_color, stdout);
 515 }
 516
 517 static int get_colorbool_found;
 518 static int get_diff_color_found;
 519 static int get_color_ui_found;
 520 static int git_get_colorbool_config(const char *var, const char *value,
 521                                     const struct config_context *ctx UNUSED,
 522                                     void *data UNUSED)
 523 {
 524         if (!strcmp(var, get_colorbool_slot))
 525                 get_colorbool_found = git_config_colorbool(var, value);
 526         else if (!strcmp(var, "diff.color"))
 527                 get_diff_color_found = git_config_colorbool(var, value);
 528         else if (!strcmp(var, "color.ui"))
 529                 get_color_ui_found = git_config_colorbool(var, value);
 530         return 0;
 531 }
 532
 533 static int get_colorbool(const char *var, int print)
 534 {
 535         get_colorbool_slot = var;
 536         get_colorbool_found = -1;
 537         get_diff_color_found = -1;
 538         get_color_ui_found = -1;
 539         config_with_options(git_get_colorbool_config, NULL,
 540                             &given_config_source, the_repository,
 541                             &config_options);
 542
 543         if (get_colorbool_found < 0) {
 544                 if (!strcmp(get_colorbool_slot, "color.diff"))
 545                         get_colorbool_found = get_diff_color_found;
 546                 if (get_colorbool_found < 0)
 547                         get_colorbool_found = get_color_ui_found;
 548         }
 549
 550         if (get_colorbool_found < 0)
 551                 /* default value if none found in config */
 552                 get_colorbool_found = GIT_COLOR_AUTO;
 553
 554         get_colorbool_found = want_color(get_colorbool_found);
 555
 556         if (print) {
 557                 printf("%s\n", get_colorbool_found ? "true" : "false");
 558                 return 0;
 559         } else
 560                 return get_colorbool_found ? 0 : 1;
 561 }
 562
 563 static void check_write(void)
 564 {
 565         if (!given_config_source.file && !startup_info->have_repository)
 566                 die(_("not in a git directory"));
 567
 568         if (given_config_source.use_stdin)
 569                 die(_("writing to stdin is not supported"));
 570
 571         if (given_config_source.blob)
 572                 die(_("writing config blobs is not supported"));
 573 }
 574
 575 struct urlmatch_current_candidate_value {
 576         char value_is_null;
 577         struct strbuf value;
 578         struct key_value_info kvi;
 579 };
 580
 581 static int urlmatch_collect_fn(const char *var, const char *value,
 582                                const struct config_context *ctx,
 583                                void *cb)
 584 {
 585         struct string_list *values = cb;
 586         struct string_list_item *item = string_list_insert(values, var);
 587         struct urlmatch_current_candidate_value *matched = item->util;
 588         const struct key_value_info *kvi = ctx->kvi;
 589
 590         if (!matched) {
 591                 matched = xmalloc(sizeof(*matched));
 592                 strbuf_init(&matched->value, 0);
 593                 item->util = matched;
 594         } else {
 595                 strbuf_reset(&matched->value);
 596         }
 597         matched->kvi = *kvi;
 598
 599         if (value) {
 600                 strbuf_addstr(&matched->value, value);
 601                 matched->value_is_null = 0;
 602         } else {
 603                 matched->value_is_null = 1;
 604         }
 605         return 0;
 606 }
 607
 608 static int get_urlmatch(const char *var, const char *url)
 609 {
 610         int ret;
 611         char *section_tail;
 612         struct string_list_item *item;
 613         struct urlmatch_config config = URLMATCH_CONFIG_INIT;
 614         struct string_list values = STRING_LIST_INIT_DUP;
 615
 616         config.collect_fn = urlmatch_collect_fn;
 617         config.cascade_fn = NULL;
 618         config.cb = &values;
 619
 620         if (!url_normalize(url, &config.url))
 621                 die("%s", config.url.err);
 622
 623         config.section = xstrdup_tolower(var);
 624         section_tail = strchr(config.section, '.');
 625         if (section_tail) {
 626                 *section_tail = '\0';
 627                 config.key = section_tail + 1;
 628                 show_keys = 0;
 629         } else {
 630                 config.key = NULL;
 631                 show_keys = 1;
 632         }
 633
 634         config_with_options(urlmatch_config_entry, &config,
 635                             &given_config_source, the_repository,
 636                             &config_options);
 637
 638         ret = !values.nr;
 639
 640         for_each_string_list_item(item, &values) {
 641                 struct urlmatch_current_candidate_value *matched = item->util;
 642                 struct strbuf buf = STRBUF_INIT;
 643
 644                 format_config(&buf, item->string,
 645                               matched->value_is_null ? NULL : matched->value.buf,
 646                               &matched->kvi);
 647                 fwrite(buf.buf, 1, buf.len, stdout);
 648                 strbuf_release(&buf);
 649
 650                 strbuf_release(&matched->value);
 651         }
 652         urlmatch_config_release(&config);
 653         string_list_clear(&values, 1);
 654         free(config.url.url);
 655
 656         free((void *)config.section);
 657         return ret;
 658 }
 659
 660 static char *default_user_config(void)
 661 {
 662         struct strbuf buf = STRBUF_INIT;
 663         strbuf_addf(&buf,
 664                     _("# This is Git's per-user configuration file.\n"
 665                       "[user]\n"
 666                       "# Please adapt and uncomment the following lines:\n"
 667                       "#        name = %s\n"
 668                       "#        email = %s\n"),
 669                     ident_default_name(),
 670                     ident_default_email());
 671         return strbuf_detach(&buf, NULL);
 672 }
 673
 674 int cmd_config(int argc, const char **argv, const char *prefix)
 675 {
 676         int nongit = !startup_info->have_repository;
 677         char *value = NULL;
 678         int flags = 0;
 679         int ret = 0;
 680         struct key_value_info default_kvi = KVI_INIT;
 681
 682         given_config_source.file = xstrdup_or_null(getenv(CONFIG_ENVIRONMENT));
 683
 684         argc = parse_options(argc, argv, prefix, builtin_config_options,
 685                              builtin_config_usage,
 686                              PARSE_OPT_STOP_AT_NON_OPTION);
 687
 688         if (use_global_config + use_system_config + use_local_config +
 689             use_worktree_config +
 690             !!given_config_source.file + !!given_config_source.blob > 1) {
 691                 error(_("only one config file at a time"));
 692                 usage_builtin_config();
 693         }
 694
 695         if (nongit) {
 696                 if (use_local_config)
 697                         die(_("--local can only be used inside a git repository"));
 698                 if (given_config_source.blob)
 699                         die(_("--blob can only be used inside a git repository"));
 700                 if (use_worktree_config)
 701                         die(_("--worktree can only be used inside a git repository"));
 702
 703         }
 704
 705         if (given_config_source.file &&
 706                         !strcmp(given_config_source.file, "-")) {
 707                 given_config_source.file = NULL;
 708                 given_config_source.use_stdin = 1;
 709                 given_config_source.scope = CONFIG_SCOPE_COMMAND;
 710         }
 711
 712         if (use_global_config) {
 713                 given_config_source.file = git_global_config();
 714                 if (!given_config_source.file)
 715                         /*
 716                          * It is unknown if HOME/.gitconfig exists, so
 717                          * we do not know if we should write to XDG
 718                          * location; error out even if XDG_CONFIG_HOME
 719                          * is set and points at a sane location.
 720                          */
 721                         die(_("$HOME not set"));
 722                 given_config_source.scope = CONFIG_SCOPE_GLOBAL;
 723         } else if (use_system_config) {
 724                 given_config_source.file = git_system_config();
 725                 given_config_source.scope = CONFIG_SCOPE_SYSTEM;
 726         } else if (use_local_config) {
 727                 given_config_source.file = git_pathdup("config");
 728                 given_config_source.scope = CONFIG_SCOPE_LOCAL;
 729         } else if (use_worktree_config) {
 730                 struct worktree **worktrees = get_worktrees();
 731                 if (the_repository->repository_format_worktree_config)
 732                         given_config_source.file = git_pathdup("config.worktree");
 733                 else if (worktrees[0] && worktrees[1])
 734                         die(_("--worktree cannot be used with multiple "
 735                               "working trees unless the config\n"
 736                               "extension worktreeConfig is enabled. "
 737                               "Please read \"CONFIGURATION FILE\"\n"
 738                               "section in \"git help worktree\" for details"));
 739                 else
 740                         given_config_source.file = git_pathdup("config");
 741                 given_config_source.scope = CONFIG_SCOPE_LOCAL;
 742                 free_worktrees(worktrees);
 743         } else if (given_config_source.file) {
 744                 if (!is_absolute_path(given_config_source.file) && prefix)
 745                         given_config_source.file =
 746                                 prefix_filename(prefix, given_config_source.file);
 747                 given_config_source.scope = CONFIG_SCOPE_COMMAND;
 748         } else if (given_config_source.blob) {
 749                 given_config_source.scope = CONFIG_SCOPE_COMMAND;
 750         }
 751
 752         if (respect_includes_opt == -1)
 753                 config_options.respect_includes = !given_config_source.file;
 754         else
 755                 config_options.respect_includes = respect_includes_opt;
 756         if (!nongit) {
 757                 config_options.commondir = get_git_common_dir();
 758                 config_options.git_dir = get_git_dir();
 759         }
 760
 761         if (end_nul) {
 762                 term = '\0';
 763                 delim = '\n';
 764                 key_delim = '\n';
 765         }
 766
 767         if ((actions & (ACTION_GET_COLOR|ACTION_GET_COLORBOOL)) && type) {
 768                 error(_("--get-color and variable type are incoherent"));
 769                 usage_builtin_config();
 770         }
 771
 772         if (HAS_MULTI_BITS(actions)) {
 773                 error(_("only one action at a time"));
 774                 usage_builtin_config();
 775         }
 776         if (actions == 0)
 777                 switch (argc) {
 778                 case 1: actions = ACTION_GET; break;
 779                 case 2: actions = ACTION_SET; break;
 780                 case 3: actions = ACTION_SET_ALL; break;
 781                 default:
 782                         usage_builtin_config();
 783                 }
 784         if (omit_values &&
 785             !(actions == ACTION_LIST || actions == ACTION_GET_REGEXP)) {
 786                 error(_("--name-only is only applicable to --list or --get-regexp"));
 787                 usage_builtin_config();
 788         }
 789
 790         if (show_origin && !(actions &
 791                 (ACTION_GET|ACTION_GET_ALL|ACTION_GET_REGEXP|ACTION_LIST))) {
 792                 error(_("--show-origin is only applicable to --get, --get-all, "
 793                         "--get-regexp, and --list"));
 794                 usage_builtin_config();
 795         }
 796
 797         if (default_value && !(actions & ACTION_GET)) {
 798                 error(_("--default is only applicable to --get"));
 799                 usage_builtin_config();
 800         }
 801
 802         if (comment &&
 803             !(actions & (ACTION_ADD|ACTION_SET|ACTION_SET_ALL|ACTION_REPLACE_ALL))) {
 804                 error(_("--comment is only applicable to add/set/replace operations"));
 805                 usage_builtin_config();
 806         }
 807
 808         /* check usage of --fixed-value */
 809         if (fixed_value) {
 810                 int allowed_usage = 0;
 811
 812                 switch (actions) {
 813                 /* git config --get <name> <value-pattern> */
 814                 case ACTION_GET:
 815                 /* git config --get-all <name> <value-pattern> */
 816                 case ACTION_GET_ALL:
 817                 /* git config --get-regexp <name-pattern> <value-pattern> */
 818                 case ACTION_GET_REGEXP:
 819                 /* git config --unset <name> <value-pattern> */
 820                 case ACTION_UNSET:
 821                 /* git config --unset-all <name> <value-pattern> */
 822                 case ACTION_UNSET_ALL:
 823                         allowed_usage = argc > 1 && !!argv[1];
 824                         break;
 825
 826                 /* git config <name> <value> <value-pattern> */
 827                 case ACTION_SET_ALL:
 828                 /* git config --replace-all <name> <value> <value-pattern> */
 829                 case ACTION_REPLACE_ALL:
 830                         allowed_usage = argc > 2 && !!argv[2];
 831                         break;
 832
 833                 /* other options don't allow --fixed-value */
 834                 }
 835
 836                 if (!allowed_usage) {
 837                         error(_("--fixed-value only applies with 'value-pattern'"));
 838                         usage_builtin_config();
 839                 }
 840
 841                 flags |= CONFIG_FLAGS_FIXED_VALUE;
 842         }
 843
 844         comment = git_config_prepare_comment_string(comment);
 845
 846         if (actions & PAGING_ACTIONS)
 847                 setup_auto_pager("config", 1);
 848
 849         if (actions == ACTION_LIST) {
 850                 check_argc(argc, 0, 0);
 851                 if (config_with_options(show_all_config, NULL,
 852                                         &given_config_source, the_repository,
 853                                         &config_options) < 0) {
 854                         if (given_config_source.file)
 855                                 die_errno(_("unable to read config file '%s'"),
 856                                           given_config_source.file);
 857                         else
 858                                 die(_("error processing config file(s)"));
 859                 }
 860         }
 861         else if (actions == ACTION_EDIT) {
 862                 char *config_file;
 863
 864                 check_argc(argc, 0, 0);
 865                 if (!given_config_source.file && nongit)
 866                         die(_("not in a git directory"));
 867                 if (given_config_source.use_stdin)
 868                         die(_("editing stdin is not supported"));
 869                 if (given_config_source.blob)
 870                         die(_("editing blobs is not supported"));
 871                 git_config(git_default_config, NULL);
 872                 config_file = given_config_source.file ?
 873                                 xstrdup(given_config_source.file) :
 874                                 git_pathdup("config");
 875                 if (use_global_config) {
 876                         int fd = open(config_file, O_CREAT | O_EXCL | O_WRONLY, 0666);
 877                         if (fd >= 0) {
 878                                 char *content = default_user_config();
 879                                 write_str_in_full(fd, content);
 880                                 free(content);
 881                                 close(fd);
 882                         }
 883                         else if (errno != EEXIST)
 884                                 die_errno(_("cannot create configuration file %s"), config_file);
 885                 }
 886                 launch_editor(config_file, NULL, NULL);
 887                 free(config_file);
 888         }
 889         else if (actions == ACTION_SET) {
 890                 check_write();
 891                 check_argc(argc, 2, 2);
 892                 value = normalize_value(argv[0], argv[1], &default_kvi);
 893                 ret = git_config_set_in_file_gently(given_config_source.file, argv[0], comment, value);
 894                 if (ret == CONFIG_NOTHING_SET)
 895                         error(_("cannot overwrite multiple values with a single value\n"
 896                         "       Use a regexp, --add or --replace-all to change %s."), argv[0]);
 897         }
 898         else if (actions == ACTION_SET_ALL) {
 899                 check_write();
 900                 check_argc(argc, 2, 3);
 901                 value = normalize_value(argv[0], argv[1], &default_kvi);
 902                 ret = git_config_set_multivar_in_file_gently(given_config_source.file,
 903                                                              argv[0], value, argv[2],
 904                                                              comment, flags);
 905         }
 906         else if (actions == ACTION_ADD) {
 907                 check_write();
 908                 check_argc(argc, 2, 2);
 909                 value = normalize_value(argv[0], argv[1], &default_kvi);
 910                 ret = git_config_set_multivar_in_file_gently(given_config_source.file,
 911                                                              argv[0], value,
 912                                                              CONFIG_REGEX_NONE,
 913                                                              comment, flags);
 914         }
 915         else if (actions == ACTION_REPLACE_ALL) {
 916                 check_write();
 917                 check_argc(argc, 2, 3);
 918                 value = normalize_value(argv[0], argv[1], &default_kvi);
 919                 ret = git_config_set_multivar_in_file_gently(given_config_source.file,
 920                                                              argv[0], value, argv[2],
 921                                                              comment, flags | CONFIG_FLAGS_MULTI_REPLACE);
 922         }
 923         else if (actions == ACTION_GET) {
 924                 check_argc(argc, 1, 2);
 925                 return get_value(argv[0], argv[1], flags);
 926         }
 927         else if (actions == ACTION_GET_ALL) {
 928                 do_all = 1;
 929                 check_argc(argc, 1, 2);
 930                 return get_value(argv[0], argv[1], flags);
 931         }
 932         else if (actions == ACTION_GET_REGEXP) {
 933                 show_keys = 1;
 934                 use_key_regexp = 1;
 935                 do_all = 1;
 936                 check_argc(argc, 1, 2);
 937                 return get_value(argv[0], argv[1], flags);
 938         }
 939         else if (actions == ACTION_GET_URLMATCH) {
 940                 check_argc(argc, 2, 2);
 941                 return get_urlmatch(argv[0], argv[1]);
 942         }
 943         else if (actions == ACTION_UNSET) {
 944                 check_write();
 945                 check_argc(argc, 1, 2);
 946                 if (argc == 2)
 947                         return git_config_set_multivar_in_file_gently(given_config_source.file,
 948                                                                       argv[0], NULL, argv[1],
 949                                                                       NULL, flags);
 950                 else
 951                         return git_config_set_in_file_gently(given_config_source.file,
 952                                                              argv[0], NULL, NULL);
 953         }
 954         else if (actions == ACTION_UNSET_ALL) {
 955                 check_write();
 956                 check_argc(argc, 1, 2);
 957                 return git_config_set_multivar_in_file_gently(given_config_source.file,
 958                                                               argv[0], NULL, argv[1],
 959                                                               NULL, flags | CONFIG_FLAGS_MULTI_REPLACE);
 960         }
 961         else if (actions == ACTION_RENAME_SECTION) {
 962                 check_write();
 963                 check_argc(argc, 2, 2);
 964                 ret = git_config_rename_section_in_file(given_config_source.file,
 965                                                         argv[0], argv[1]);
 966                 if (ret < 0)
 967                         return ret;
 968                 else if (!ret)
 969                         die(_("no such section: %s"), argv[0]);
 970                 else
 971                         ret = 0;
 972         }
 973         else if (actions == ACTION_REMOVE_SECTION) {
 974                 check_write();
 975                 check_argc(argc, 1, 1);
 976                 ret = git_config_rename_section_in_file(given_config_source.file,
 977                                                         argv[0], NULL);
 978                 if (ret < 0)
 979                         return ret;
 980                 else if (!ret)
 981                         die(_("no such section: %s"), argv[0]);
 982                 else
 983                         ret = 0;
 984         }
 985         else if (actions == ACTION_GET_COLOR) {
 986                 check_argc(argc, 1, 2);
 987                 get_color(argv[0], argv[1]);
 988         }
 989         else if (actions == ACTION_GET_COLORBOOL) {
 990                 check_argc(argc, 1, 2);
 991                 if (argc == 2)
 992                         color_stdout_is_tty = git_config_bool("command line", argv[1]);
 993                 return get_colorbool(argv[0], argc == 2);
 994         }
 995
 996         free(value);
 997         return ret;
 998 }