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(const struct key_value_info *kvi,
 198                                struct strbuf *buf)
 199 {
 200         const char term = end_nul ? '\0' : '\t';
 201
 202         strbuf_addstr(buf, config_origin_type_name(kvi->origin_type));
 203         strbuf_addch(buf, ':');
 204         if (end_nul)
 205                 strbuf_addstr(buf, kvi->filename ? kvi->filename : "");
 206         else
 207                 quote_c_style(kvi->filename ? kvi->filename : "", buf, NULL, 0);
 208         strbuf_addch(buf, term);
 209 }
 210
 211 static void show_config_scope(const struct key_value_info *kvi,
 212                               struct strbuf *buf)
 213 {
 214         const char term = end_nul ? '\0' : '\t';
 215         const char *scope = config_scope_name(kvi->scope);
 216
 217         strbuf_addstr(buf, N_(scope));
 218         strbuf_addch(buf, term);
 219 }
 220
 221 static int show_all_config(const char *key_, const char *value_,
 222                            const struct config_context *ctx,
 223                            void *cb UNUSED)
 224 {
 225         const struct key_value_info *kvi = ctx->kvi;
 226
 227         if (show_origin || show_scope) {
 228                 struct strbuf buf = STRBUF_INIT;
 229                 if (show_scope)
 230                         show_config_scope(kvi, &buf);
 231                 if (show_origin)
 232                         show_config_origin(kvi, &buf);
 233                 /* Use fwrite as "buf" can contain \0's if "end_null" is set. */
 234                 fwrite(buf.buf, 1, buf.len, stdout);
 235                 strbuf_release(&buf);
 236         }
 237         if (!omit_values && value_)
 238                 printf("%s%c%s%c", key_, delim, value_, term);
 239         else
 240                 printf("%s%c", key_, term);
 241         return 0;
 242 }
 243
 244 struct strbuf_list {
 245         struct strbuf *items;
 246         int nr;
 247         int alloc;
 248 };
 249
 250 static int format_config(struct strbuf *buf, const char *key_,
 251                          const char *value_, const struct key_value_info *kvi)
 252 {
 253         if (show_scope)
 254                 show_config_scope(kvi, buf);
 255         if (show_origin)
 256                 show_config_origin(kvi, buf);
 257         if (show_keys)
 258                 strbuf_addstr(buf, key_);
 259         if (!omit_values) {
 260                 if (show_keys)
 261                         strbuf_addch(buf, key_delim);
 262
 263                 if (type == TYPE_INT)
 264                         strbuf_addf(buf, "%"PRId64,
 265                                     git_config_int64(key_, value_ ? value_ : "", kvi));
 266                 else if (type == TYPE_BOOL)
 267                         strbuf_addstr(buf, git_config_bool(key_, value_) ?
 268                                       "true" : "false");
 269                 else if (type == TYPE_BOOL_OR_INT) {
 270                         int is_bool, v;
 271                         v = git_config_bool_or_int(key_, value_, kvi,
 272                                                    &is_bool);
 273                         if (is_bool)
 274                                 strbuf_addstr(buf, v ? "true" : "false");
 275                         else
 276                                 strbuf_addf(buf, "%d", v);
 277                 } else if (type == TYPE_BOOL_OR_STR) {
 278                         int v = git_parse_maybe_bool(value_);
 279                         if (v < 0)
 280                                 strbuf_addstr(buf, value_);
 281                         else
 282                                 strbuf_addstr(buf, v ? "true" : "false");
 283                 } else if (type == TYPE_PATH) {
 284                         const char *v;
 285                         if (git_config_pathname(&v, key_, value_) < 0)
 286                                 return -1;
 287                         strbuf_addstr(buf, v);
 288                         free((char *)v);
 289                 } else if (type == TYPE_EXPIRY_DATE) {
 290                         timestamp_t t;
 291                         if (git_config_expiry_date(&t, key_, value_) < 0)
 292                                 return -1;
 293                         strbuf_addf(buf, "%"PRItime, t);
 294                 } else if (type == TYPE_COLOR) {
 295                         char v[COLOR_MAXLEN];
 296                         if (git_config_color(v, key_, value_) < 0)
 297                                 return -1;
 298                         strbuf_addstr(buf, v);
 299                 } else if (value_) {
 300                         strbuf_addstr(buf, value_);
 301                 } else {
 302                         /* Just show the key name; back out delimiter */
 303                         if (show_keys)
 304                                 strbuf_setlen(buf, buf->len - 1);
 305                 }
 306         }
 307         strbuf_addch(buf, term);
 308         return 0;
 309 }
 310
 311 static int collect_config(const char *key_, const char *value_,
 312                           const struct config_context *ctx, void *cb)
 313 {
 314         struct strbuf_list *values = cb;
 315         const struct key_value_info *kvi = ctx->kvi;
 316
 317         if (!use_key_regexp && strcmp(key_, key))
 318                 return 0;
 319         if (use_key_regexp && regexec(key_regexp, key_, 0, NULL, 0))
 320                 return 0;
 321         if (fixed_value && strcmp(value_pattern, (value_?value_:"")))
 322                 return 0;
 323         if (regexp != NULL &&
 324             (do_not_match ^ !!regexec(regexp, (value_?value_:""), 0, NULL, 0)))
 325                 return 0;
 326
 327         ALLOC_GROW(values->items, values->nr + 1, values->alloc);
 328         strbuf_init(&values->items[values->nr], 0);
 329
 330         return format_config(&values->items[values->nr++], key_, value_, kvi);
 331 }
 332
 333 static int get_value(const char *key_, const char *regex_, unsigned flags)
 334 {
 335         int ret = CONFIG_GENERIC_ERROR;
 336         struct strbuf_list values = {NULL};
 337         int i;
 338
 339         if (use_key_regexp) {
 340                 char *tl;
 341
 342                 /*
 343                  * NEEDSWORK: this naive pattern lowercasing obviously does not
 344                  * work for more complex patterns like "^[^.]*Foo.*bar".
 345                  * Perhaps we should deprecate this altogether someday.
 346                  */
 347
 348                 key = xstrdup(key_);
 349                 for (tl = key + strlen(key) - 1;
 350                      tl >= key && *tl != '.';
 351                      tl--)
 352                         *tl = tolower(*tl);
 353                 for (tl = key; *tl && *tl != '.'; tl++)
 354                         *tl = tolower(*tl);
 355
 356                 key_regexp = (regex_t*)xmalloc(sizeof(regex_t));
 357                 if (regcomp(key_regexp, key, REG_EXTENDED)) {
 358                         error(_("invalid key pattern: %s"), key_);
 359                         FREE_AND_NULL(key_regexp);
 360                         ret = CONFIG_INVALID_PATTERN;
 361                         goto free_strings;
 362                 }
 363         } else {
 364                 if (git_config_parse_key(key_, &key, NULL)) {
 365                         ret = CONFIG_INVALID_KEY;
 366                         goto free_strings;
 367                 }
 368         }
 369
 370         if (regex_ && (flags & CONFIG_FLAGS_FIXED_VALUE))
 371                 value_pattern = regex_;
 372         else if (regex_) {
 373                 if (regex_[0] == '!') {
 374                         do_not_match = 1;
 375                         regex_++;
 376                 }
 377
 378                 regexp = (regex_t*)xmalloc(sizeof(regex_t));
 379                 if (regcomp(regexp, regex_, REG_EXTENDED)) {
 380                         error(_("invalid pattern: %s"), regex_);
 381                         FREE_AND_NULL(regexp);
 382                         ret = CONFIG_INVALID_PATTERN;
 383                         goto free_strings;
 384                 }
 385         }
 386
 387         config_with_options(collect_config, &values,
 388                             &given_config_source, the_repository,
 389                             &config_options);
 390
 391         if (!values.nr && default_value) {
 392                 struct key_value_info kvi = KVI_INIT;
 393                 struct strbuf *item;
 394
 395                 kvi_from_param(&kvi);
 396                 ALLOC_GROW(values.items, values.nr + 1, values.alloc);
 397                 item = &values.items[values.nr++];
 398                 strbuf_init(item, 0);
 399                 if (format_config(item, key_, default_value, &kvi) < 0)
 400                         die(_("failed to format default config value: %s"),
 401                                 default_value);
 402         }
 403
 404         ret = !values.nr;
 405
 406         for (i = 0; i < values.nr; i++) {
 407                 struct strbuf *buf = values.items + i;
 408                 if (do_all || i == values.nr - 1)
 409                         fwrite(buf->buf, 1, buf->len, stdout);
 410                 strbuf_release(buf);
 411         }
 412         free(values.items);
 413
 414 free_strings:
 415         free(key);
 416         if (key_regexp) {
 417                 regfree(key_regexp);
 418                 free(key_regexp);
 419         }
 420         if (regexp) {
 421                 regfree(regexp);
 422                 free(regexp);
 423         }
 424
 425         return ret;
 426 }
 427
 428 static char *normalize_value(const char *key, const char *value,
 429                              struct key_value_info *kvi)
 430 {
 431         if (!value)
 432                 return NULL;
 433
 434         if (type == 0 || type == TYPE_PATH || type == TYPE_EXPIRY_DATE)
 435                 /*
 436                  * We don't do normalization for TYPE_PATH here: If
 437                  * the path is like ~/foobar/, we prefer to store
 438                  * "~/foobar/" in the config file, and to expand the ~
 439                  * when retrieving the value.
 440                  * Also don't do normalization for expiry dates.
 441                  */
 442                 return xstrdup(value);
 443         if (type == TYPE_INT)
 444                 return xstrfmt("%"PRId64, git_config_int64(key, value, kvi));
 445         if (type == TYPE_BOOL)
 446                 return xstrdup(git_config_bool(key, value) ?  "true" : "false");
 447         if (type == TYPE_BOOL_OR_INT) {
 448                 int is_bool, v;
 449                 v = git_config_bool_or_int(key, value, kvi, &is_bool);
 450                 if (!is_bool)
 451                         return xstrfmt("%d", v);
 452                 else
 453                         return xstrdup(v ? "true" : "false");
 454         }
 455         if (type == TYPE_BOOL_OR_STR) {
 456                 int v = git_parse_maybe_bool(value);
 457                 if (v < 0)
 458                         return xstrdup(value);
 459                 else
 460                         return xstrdup(v ? "true" : "false");
 461         }
 462         if (type == TYPE_COLOR) {
 463                 char v[COLOR_MAXLEN];
 464                 if (git_config_color(v, key, value))
 465                         die(_("cannot parse color '%s'"), value);
 466
 467                 /*
 468                  * The contents of `v` now contain an ANSI escape
 469                  * sequence, not suitable for including within a
 470                  * configuration file. Treat the above as a
 471                  * "sanity-check", and return the given value, which we
 472                  * know is representable as valid color code.
 473                  */
 474                 return xstrdup(value);
 475         }
 476
 477         BUG("cannot normalize type %d", type);
 478 }
 479
 480 static int get_color_found;
 481 static const char *get_color_slot;
 482 static const char *get_colorbool_slot;
 483 static char parsed_color[COLOR_MAXLEN];
 484
 485 static int git_get_color_config(const char *var, const char *value,
 486                                 const struct config_context *ctx UNUSED,
 487                                 void *cb UNUSED)
 488 {
 489         if (!strcmp(var, get_color_slot)) {
 490                 if (!value)
 491                         config_error_nonbool(var);
 492                 if (color_parse(value, parsed_color) < 0)
 493                         return -1;
 494                 get_color_found = 1;
 495         }
 496         return 0;
 497 }
 498
 499 static void get_color(const char *var, const char *def_color)
 500 {
 501         get_color_slot = var;
 502         get_color_found = 0;
 503         parsed_color[0] = '\0';
 504         config_with_options(git_get_color_config, NULL,
 505                             &given_config_source, the_repository,
 506                             &config_options);
 507
 508         if (!get_color_found && def_color) {
 509                 if (color_parse(def_color, parsed_color) < 0)
 510                         die(_("unable to parse default color value"));
 511         }
 512
 513         fputs(parsed_color, stdout);
 514 }
 515
 516 static int get_colorbool_found;
 517 static int get_diff_color_found;
 518 static int get_color_ui_found;
 519 static int git_get_colorbool_config(const char *var, const char *value,
 520                                     const struct config_context *ctx UNUSED,
 521                                     void *data UNUSED)
 522 {
 523         if (!strcmp(var, get_colorbool_slot))
 524                 get_colorbool_found = git_config_colorbool(var, value);
 525         else if (!strcmp(var, "diff.color"))
 526                 get_diff_color_found = git_config_colorbool(var, value);
 527         else if (!strcmp(var, "color.ui"))
 528                 get_color_ui_found = git_config_colorbool(var, value);
 529         return 0;
 530 }
 531
 532 static int get_colorbool(const char *var, int print)
 533 {
 534         get_colorbool_slot = var;
 535         get_colorbool_found = -1;
 536         get_diff_color_found = -1;
 537         get_color_ui_found = -1;
 538         config_with_options(git_get_colorbool_config, NULL,
 539                             &given_config_source, the_repository,
 540                             &config_options);
 541
 542         if (get_colorbool_found < 0) {
 543                 if (!strcmp(get_colorbool_slot, "color.diff"))
 544                         get_colorbool_found = get_diff_color_found;
 545                 if (get_colorbool_found < 0)
 546                         get_colorbool_found = get_color_ui_found;
 547         }
 548
 549         if (get_colorbool_found < 0)
 550                 /* default value if none found in config */
 551                 get_colorbool_found = GIT_COLOR_AUTO;
 552
 553         get_colorbool_found = want_color(get_colorbool_found);
 554
 555         if (print) {
 556                 printf("%s\n", get_colorbool_found ? "true" : "false");
 557                 return 0;
 558         } else
 559                 return get_colorbool_found ? 0 : 1;
 560 }
 561
 562 static void check_write(void)
 563 {
 564         if (!given_config_source.file && !startup_info->have_repository)
 565                 die(_("not in a git directory"));
 566
 567         if (given_config_source.use_stdin)
 568                 die(_("writing to stdin is not supported"));
 569
 570         if (given_config_source.blob)
 571                 die(_("writing config blobs is not supported"));
 572 }
 573
 574 struct urlmatch_current_candidate_value {
 575         char value_is_null;
 576         struct strbuf value;
 577         struct key_value_info kvi;
 578 };
 579
 580 static int urlmatch_collect_fn(const char *var, const char *value,
 581                                const struct config_context *ctx,
 582                                void *cb)
 583 {
 584         struct string_list *values = cb;
 585         struct string_list_item *item = string_list_insert(values, var);
 586         struct urlmatch_current_candidate_value *matched = item->util;
 587         const struct key_value_info *kvi = ctx->kvi;
 588
 589         if (!matched) {
 590                 matched = xmalloc(sizeof(*matched));
 591                 strbuf_init(&matched->value, 0);
 592                 item->util = matched;
 593         } else {
 594                 strbuf_reset(&matched->value);
 595         }
 596         matched->kvi = *kvi;
 597
 598         if (value) {
 599                 strbuf_addstr(&matched->value, value);
 600                 matched->value_is_null = 0;
 601         } else {
 602                 matched->value_is_null = 1;
 603         }
 604         return 0;
 605 }
 606
 607 static int get_urlmatch(const char *var, const char *url)
 608 {
 609         int ret;
 610         char *section_tail;
 611         struct string_list_item *item;
 612         struct urlmatch_config config = URLMATCH_CONFIG_INIT;
 613         struct string_list values = STRING_LIST_INIT_DUP;
 614
 615         config.collect_fn = urlmatch_collect_fn;
 616         config.cascade_fn = NULL;
 617         config.cb = &values;
 618
 619         if (!url_normalize(url, &config.url))
 620                 die("%s", config.url.err);
 621
 622         config.section = xstrdup_tolower(var);
 623         section_tail = strchr(config.section, '.');
 624         if (section_tail) {
 625                 *section_tail = '\0';
 626                 config.key = section_tail + 1;
 627                 show_keys = 0;
 628         } else {
 629                 config.key = NULL;
 630                 show_keys = 1;
 631         }
 632
 633         config_with_options(urlmatch_config_entry, &config,
 634                             &given_config_source, the_repository,
 635                             &config_options);
 636
 637         ret = !values.nr;
 638
 639         for_each_string_list_item(item, &values) {
 640                 struct urlmatch_current_candidate_value *matched = item->util;
 641                 struct strbuf buf = STRBUF_INIT;
 642
 643                 format_config(&buf, item->string,
 644                               matched->value_is_null ? NULL : matched->value.buf,
 645                               &matched->kvi);
 646                 fwrite(buf.buf, 1, buf.len, stdout);
 647                 strbuf_release(&buf);
 648
 649                 strbuf_release(&matched->value);
 650         }
 651         urlmatch_config_release(&config);
 652         string_list_clear(&values, 1);
 653         free(config.url.url);
 654
 655         free((void *)config.section);
 656         return ret;
 657 }
 658
 659 static char *default_user_config(void)
 660 {
 661         struct strbuf buf = STRBUF_INIT;
 662         strbuf_addf(&buf,
 663                     _("# This is Git's per-user configuration file.\n"
 664                       "[user]\n"
 665                       "# Please adapt and uncomment the following lines:\n"
 666                       "#        name = %s\n"
 667                       "#        email = %s\n"),
 668                     ident_default_name(),
 669                     ident_default_email());
 670         return strbuf_detach(&buf, NULL);
 671 }
 672
 673 int cmd_config(int argc, const char **argv, const char *prefix)
 674 {
 675         int nongit = !startup_info->have_repository;
 676         char *value = NULL;
 677         int flags = 0;
 678         int ret = 0;
 679         struct key_value_info default_kvi = KVI_INIT;
 680
 681         given_config_source.file = xstrdup_or_null(getenv(CONFIG_ENVIRONMENT));
 682
 683         argc = parse_options(argc, argv, prefix, builtin_config_options,
 684                              builtin_config_usage,
 685                              PARSE_OPT_STOP_AT_NON_OPTION);
 686
 687         if (use_global_config + use_system_config + use_local_config +
 688             use_worktree_config +
 689             !!given_config_source.file + !!given_config_source.blob > 1) {
 690                 error(_("only one config file at a time"));
 691                 usage_builtin_config();
 692         }
 693
 694         if (nongit) {
 695                 if (use_local_config)
 696                         die(_("--local can only be used inside a git repository"));
 697                 if (given_config_source.blob)
 698                         die(_("--blob can only be used inside a git repository"));
 699                 if (use_worktree_config)
 700                         die(_("--worktree can only be used inside a git repository"));
 701
 702         }
 703
 704         if (given_config_source.file &&
 705                         !strcmp(given_config_source.file, "-")) {
 706                 given_config_source.file = NULL;
 707                 given_config_source.use_stdin = 1;
 708                 given_config_source.scope = CONFIG_SCOPE_COMMAND;
 709         }
 710
 711         if (use_global_config) {
 712                 char *user_config, *xdg_config;
 713
 714                 git_global_config(&user_config, &xdg_config);
 715                 if (!user_config)
 716                         /*
 717                          * It is unknown if HOME/.gitconfig exists, so
 718                          * we do not know if we should write to XDG
 719                          * location; error out even if XDG_CONFIG_HOME
 720                          * is set and points at a sane location.
 721                          */
 722                         die(_("$HOME not set"));
 723
 724                 given_config_source.scope = CONFIG_SCOPE_GLOBAL;
 725
 726                 if (access_or_warn(user_config, R_OK, 0) &&
 727                     xdg_config && !access_or_warn(xdg_config, R_OK, 0)) {
 728                         given_config_source.file = xdg_config;
 729                         free(user_config);
 730                 } else {
 731                         given_config_source.file = user_config;
 732                         free(xdg_config);
 733                 }
 734         }
 735         else if (use_system_config) {
 736                 given_config_source.file = git_system_config();
 737                 given_config_source.scope = CONFIG_SCOPE_SYSTEM;
 738         } else if (use_local_config) {
 739                 given_config_source.file = git_pathdup("config");
 740                 given_config_source.scope = CONFIG_SCOPE_LOCAL;
 741         } else if (use_worktree_config) {
 742                 struct worktree **worktrees = get_worktrees();
 743                 if (the_repository->repository_format_worktree_config)
 744                         given_config_source.file = git_pathdup("config.worktree");
 745                 else if (worktrees[0] && worktrees[1])
 746                         die(_("--worktree cannot be used with multiple "
 747                               "working trees unless the config\n"
 748                               "extension worktreeConfig is enabled. "
 749                               "Please read \"CONFIGURATION FILE\"\n"
 750                               "section in \"git help worktree\" for details"));
 751                 else
 752                         given_config_source.file = git_pathdup("config");
 753                 given_config_source.scope = CONFIG_SCOPE_LOCAL;
 754                 free_worktrees(worktrees);
 755         } else if (given_config_source.file) {
 756                 if (!is_absolute_path(given_config_source.file) && prefix)
 757                         given_config_source.file =
 758                                 prefix_filename(prefix, given_config_source.file);
 759                 given_config_source.scope = CONFIG_SCOPE_COMMAND;
 760         } else if (given_config_source.blob) {
 761                 given_config_source.scope = CONFIG_SCOPE_COMMAND;
 762         }
 763
 764
 765         if (respect_includes_opt == -1)
 766                 config_options.respect_includes = !given_config_source.file;
 767         else
 768                 config_options.respect_includes = respect_includes_opt;
 769         if (!nongit) {
 770                 config_options.commondir = get_git_common_dir();
 771                 config_options.git_dir = get_git_dir();
 772         }
 773
 774         if (end_nul) {
 775                 term = '\0';
 776                 delim = '\n';
 777                 key_delim = '\n';
 778         }
 779
 780         if ((actions & (ACTION_GET_COLOR|ACTION_GET_COLORBOOL)) && type) {
 781                 error(_("--get-color and variable type are incoherent"));
 782                 usage_builtin_config();
 783         }
 784
 785         if (HAS_MULTI_BITS(actions)) {
 786                 error(_("only one action at a time"));
 787                 usage_builtin_config();
 788         }
 789         if (actions == 0)
 790                 switch (argc) {
 791                 case 1: actions = ACTION_GET; break;
 792                 case 2: actions = ACTION_SET; break;
 793                 case 3: actions = ACTION_SET_ALL; break;
 794                 default:
 795                         usage_builtin_config();
 796                 }
 797         if (omit_values &&
 798             !(actions == ACTION_LIST || actions == ACTION_GET_REGEXP)) {
 799                 error(_("--name-only is only applicable to --list or --get-regexp"));
 800                 usage_builtin_config();
 801         }
 802
 803         if (show_origin && !(actions &
 804                 (ACTION_GET|ACTION_GET_ALL|ACTION_GET_REGEXP|ACTION_LIST))) {
 805                 error(_("--show-origin is only applicable to --get, --get-all, "
 806                         "--get-regexp, and --list"));
 807                 usage_builtin_config();
 808         }
 809
 810         if (default_value && !(actions & ACTION_GET)) {
 811                 error(_("--default is only applicable to --get"));
 812                 usage_builtin_config();
 813         }
 814
 815         /* check usage of --fixed-value */
 816         if (fixed_value) {
 817                 int allowed_usage = 0;
 818
 819                 switch (actions) {
 820                 /* git config --get <name> <value-pattern> */
 821                 case ACTION_GET:
 822                 /* git config --get-all <name> <value-pattern> */
 823                 case ACTION_GET_ALL:
 824                 /* git config --get-regexp <name-pattern> <value-pattern> */
 825                 case ACTION_GET_REGEXP:
 826                 /* git config --unset <name> <value-pattern> */
 827                 case ACTION_UNSET:
 828                 /* git config --unset-all <name> <value-pattern> */
 829                 case ACTION_UNSET_ALL:
 830                         allowed_usage = argc > 1 && !!argv[1];
 831                         break;
 832
 833                 /* git config <name> <value> <value-pattern> */
 834                 case ACTION_SET_ALL:
 835                 /* git config --replace-all <name> <value> <value-pattern> */
 836                 case ACTION_REPLACE_ALL:
 837                         allowed_usage = argc > 2 && !!argv[2];
 838                         break;
 839
 840                 /* other options don't allow --fixed-value */
 841                 }
 842
 843                 if (!allowed_usage) {
 844                         error(_("--fixed-value only applies with 'value-pattern'"));
 845                         usage_builtin_config();
 846                 }
 847
 848                 flags |= CONFIG_FLAGS_FIXED_VALUE;
 849         }
 850
 851         if (actions & PAGING_ACTIONS)
 852                 setup_auto_pager("config", 1);
 853
 854         if (actions == ACTION_LIST) {
 855                 check_argc(argc, 0, 0);
 856                 if (config_with_options(show_all_config, NULL,
 857                                         &given_config_source, the_repository,
 858                                         &config_options) < 0) {
 859                         if (given_config_source.file)
 860                                 die_errno(_("unable to read config file '%s'"),
 861                                           given_config_source.file);
 862                         else
 863                                 die(_("error processing config file(s)"));
 864                 }
 865         }
 866         else if (actions == ACTION_EDIT) {
 867                 char *config_file;
 868
 869                 check_argc(argc, 0, 0);
 870                 if (!given_config_source.file && nongit)
 871                         die(_("not in a git directory"));
 872                 if (given_config_source.use_stdin)
 873                         die(_("editing stdin is not supported"));
 874                 if (given_config_source.blob)
 875                         die(_("editing blobs is not supported"));
 876                 git_config(git_default_config, NULL);
 877                 config_file = given_config_source.file ?
 878                                 xstrdup(given_config_source.file) :
 879                                 git_pathdup("config");
 880                 if (use_global_config) {
 881                         int fd = open(config_file, O_CREAT | O_EXCL | O_WRONLY, 0666);
 882                         if (fd >= 0) {
 883                                 char *content = default_user_config();
 884                                 write_str_in_full(fd, content);
 885                                 free(content);
 886                                 close(fd);
 887                         }
 888                         else if (errno != EEXIST)
 889                                 die_errno(_("cannot create configuration file %s"), config_file);
 890                 }
 891                 launch_editor(config_file, NULL, NULL);
 892                 free(config_file);
 893         }
 894         else if (actions == ACTION_SET) {
 895                 check_write();
 896                 check_argc(argc, 2, 2);
 897                 value = normalize_value(argv[0], argv[1], &default_kvi);
 898                 ret = git_config_set_in_file_gently(given_config_source.file, argv[0], value);
 899                 if (ret == CONFIG_NOTHING_SET)
 900                         error(_("cannot overwrite multiple values with a single value\n"
 901                         "       Use a regexp, --add or --replace-all to change %s."), argv[0]);
 902         }
 903         else if (actions == ACTION_SET_ALL) {
 904                 check_write();
 905                 check_argc(argc, 2, 3);
 906                 value = normalize_value(argv[0], argv[1], &default_kvi);
 907                 ret = git_config_set_multivar_in_file_gently(given_config_source.file,
 908                                                              argv[0], value, argv[2],
 909                                                              flags);
 910         }
 911         else if (actions == ACTION_ADD) {
 912                 check_write();
 913                 check_argc(argc, 2, 2);
 914                 value = normalize_value(argv[0], argv[1], &default_kvi);
 915                 ret = git_config_set_multivar_in_file_gently(given_config_source.file,
 916                                                              argv[0], value,
 917                                                              CONFIG_REGEX_NONE,
 918                                                              flags);
 919         }
 920         else if (actions == ACTION_REPLACE_ALL) {
 921                 check_write();
 922                 check_argc(argc, 2, 3);
 923                 value = normalize_value(argv[0], argv[1], &default_kvi);
 924                 ret = git_config_set_multivar_in_file_gently(given_config_source.file,
 925                                                              argv[0], value, argv[2],
 926                                                              flags | CONFIG_FLAGS_MULTI_REPLACE);
 927         }
 928         else if (actions == ACTION_GET) {
 929                 check_argc(argc, 1, 2);
 930                 return get_value(argv[0], argv[1], flags);
 931         }
 932         else if (actions == ACTION_GET_ALL) {
 933                 do_all = 1;
 934                 check_argc(argc, 1, 2);
 935                 return get_value(argv[0], argv[1], flags);
 936         }
 937         else if (actions == ACTION_GET_REGEXP) {
 938                 show_keys = 1;
 939                 use_key_regexp = 1;
 940                 do_all = 1;
 941                 check_argc(argc, 1, 2);
 942                 return get_value(argv[0], argv[1], flags);
 943         }
 944         else if (actions == ACTION_GET_URLMATCH) {
 945                 check_argc(argc, 2, 2);
 946                 return get_urlmatch(argv[0], argv[1]);
 947         }
 948         else if (actions == ACTION_UNSET) {
 949                 check_write();
 950                 check_argc(argc, 1, 2);
 951                 if (argc == 2)
 952                         return git_config_set_multivar_in_file_gently(given_config_source.file,
 953                                                                       argv[0], NULL, argv[1],
 954                                                                       flags);
 955                 else
 956                         return git_config_set_in_file_gently(given_config_source.file,
 957                                                              argv[0], NULL);
 958         }
 959         else if (actions == ACTION_UNSET_ALL) {
 960                 check_write();
 961                 check_argc(argc, 1, 2);
 962                 return git_config_set_multivar_in_file_gently(given_config_source.file,
 963                                                               argv[0], NULL, argv[1],
 964                                                               flags | CONFIG_FLAGS_MULTI_REPLACE);
 965         }
 966         else if (actions == ACTION_RENAME_SECTION) {
 967                 check_write();
 968                 check_argc(argc, 2, 2);
 969                 ret = git_config_rename_section_in_file(given_config_source.file,
 970                                                         argv[0], argv[1]);
 971                 if (ret < 0)
 972                         return ret;
 973                 else if (!ret)
 974                         die(_("no such section: %s"), argv[0]);
 975                 else
 976                         ret = 0;
 977         }
 978         else if (actions == ACTION_REMOVE_SECTION) {
 979                 check_write();
 980                 check_argc(argc, 1, 1);
 981                 ret = git_config_rename_section_in_file(given_config_source.file,
 982                                                         argv[0], NULL);
 983                 if (ret < 0)
 984                         return ret;
 985                 else if (!ret)
 986                         die(_("no such section: %s"), argv[0]);
 987                 else
 988                         ret = 0;
 989         }
 990         else if (actions == ACTION_GET_COLOR) {
 991                 check_argc(argc, 1, 2);
 992                 get_color(argv[0], argv[1]);
 993         }
 994         else if (actions == ACTION_GET_COLORBOOL) {
 995                 check_argc(argc, 1, 2);
 996                 if (argc == 2)
 997                         color_stdout_is_tty = git_config_bool("command line", argv[1]);
 998                 return get_colorbool(argv[0], argc == 2);
 999         }
1000
1001         free(value);
1002         return ret;
1003 }