builtin/config.c

   1 #include "builtin.h"
   2 #include "cache.h"
   3 #include "color.h"
   4 #include "parse-options.h"
   5
   6 static const char *const builtin_config_usage[] = {
   7         N_("git config [options]"),
   8         NULL
   9 };
  10
  11 static char *key;
  12 static regex_t *key_regexp;
  13 static regex_t *regexp;
  14 static int show_keys;
  15 static int use_key_regexp;
  16 static int do_all;
  17 static int do_not_match;
  18 static char delim = '=';
  19 static char key_delim = ' ';
  20 static char term = '\n';
  21
  22 static int use_global_config, use_system_config, use_local_config;
  23 static const char *given_config_file;
  24 static int actions, types;
  25 static const char *get_color_slot, *get_colorbool_slot;
  26 static int end_null;
  27 static int respect_includes = -1;
  28
  29 #define ACTION_GET (1<<0)
  30 #define ACTION_GET_ALL (1<<1)
  31 #define ACTION_GET_REGEXP (1<<2)
  32 #define ACTION_REPLACE_ALL (1<<3)
  33 #define ACTION_ADD (1<<4)
  34 #define ACTION_UNSET (1<<5)
  35 #define ACTION_UNSET_ALL (1<<6)
  36 #define ACTION_RENAME_SECTION (1<<7)
  37 #define ACTION_REMOVE_SECTION (1<<8)
  38 #define ACTION_LIST (1<<9)
  39 #define ACTION_EDIT (1<<10)
  40 #define ACTION_SET (1<<11)
  41 #define ACTION_SET_ALL (1<<12)
  42 #define ACTION_GET_COLOR (1<<13)
  43 #define ACTION_GET_COLORBOOL (1<<14)
  44
  45 #define TYPE_BOOL (1<<0)
  46 #define TYPE_INT (1<<1)
  47 #define TYPE_BOOL_OR_INT (1<<2)
  48 #define TYPE_PATH (1<<3)
  49
  50 static struct option builtin_config_options[] = {
  51         OPT_GROUP(N_("Config file location")),
  52         OPT_BOOLEAN(0, "global", &use_global_config, N_("use global config file")),
  53         OPT_BOOLEAN(0, "system", &use_system_config, N_("use system config file")),
  54         OPT_BOOLEAN(0, "local", &use_local_config, N_("use repository config file")),
  55         OPT_STRING('f', "file", &given_config_file, N_("file"), N_("use given config file")),
  56         OPT_GROUP(N_("Action")),
  57         OPT_BIT(0, "get", &actions, N_("get value: name [value-regex]"), ACTION_GET),
  58         OPT_BIT(0, "get-all", &actions, N_("get all values: key [value-regex]"), ACTION_GET_ALL),
  59         OPT_BIT(0, "get-regexp", &actions, N_("get values for regexp: name-regex [value-regex]"), ACTION_GET_REGEXP),
  60         OPT_BIT(0, "replace-all", &actions, N_("replace all matching variables: name value [value_regex]"), ACTION_REPLACE_ALL),
  61         OPT_BIT(0, "add", &actions, N_("add a new variable: name value"), ACTION_ADD),
  62         OPT_BIT(0, "unset", &actions, N_("remove a variable: name [value-regex]"), ACTION_UNSET),
  63         OPT_BIT(0, "unset-all", &actions, N_("remove all matches: name [value-regex]"), ACTION_UNSET_ALL),
  64         OPT_BIT(0, "rename-section", &actions, N_("rename section: old-name new-name"), ACTION_RENAME_SECTION),
  65         OPT_BIT(0, "remove-section", &actions, N_("remove a section: name"), ACTION_REMOVE_SECTION),
  66         OPT_BIT('l', "list", &actions, N_("list all"), ACTION_LIST),
  67         OPT_BIT('e', "edit", &actions, N_("open an editor"), ACTION_EDIT),
  68         OPT_STRING(0, "get-color", &get_color_slot, N_("slot"), N_("find the color configured: [default]")),
  69         OPT_STRING(0, "get-colorbool", &get_colorbool_slot, N_("slot"), N_("find the color setting: [stdout-is-tty]")),
  70         OPT_GROUP(N_("Type")),
  71         OPT_BIT(0, "bool", &types, N_("value is \"true\" or \"false\""), TYPE_BOOL),
  72         OPT_BIT(0, "int", &types, N_("value is decimal number"), TYPE_INT),
  73         OPT_BIT(0, "bool-or-int", &types, N_("value is --bool or --int"), TYPE_BOOL_OR_INT),
  74         OPT_BIT(0, "path", &types, N_("value is a path (file or directory name)"), TYPE_PATH),
  75         OPT_GROUP(N_("Other")),
  76         OPT_BOOLEAN('z', "null", &end_null, N_("terminate values with NUL byte")),
  77         OPT_BOOL(0, "includes", &respect_includes, N_("respect include directives on lookup")),
  78         OPT_END(),
  79 };
  80
  81 static void check_argc(int argc, int min, int max) {
  82         if (argc >= min && argc <= max)
  83                 return;
  84         error("wrong number of arguments");
  85         usage_with_options(builtin_config_usage, builtin_config_options);
  86 }
  87
  88 static int show_all_config(const char *key_, const char *value_, void *cb)
  89 {
  90         if (value_)
  91                 printf("%s%c%s%c", key_, delim, value_, term);
  92         else
  93                 printf("%s%c", key_, term);
  94         return 0;
  95 }
  96
  97 struct strbuf_list {
  98         struct strbuf *items;
  99         int nr;
 100         int alloc;
 101 };
 102
 103 static int collect_config(const char *key_, const char *value_, void *cb)
 104 {
 105         struct strbuf_list *values = cb;
 106         struct strbuf *buf;
 107         char value[256];
 108         const char *vptr = value;
 109         int must_free_vptr = 0;
 110         int must_print_delim = 0;
 111
 112         if (!use_key_regexp && strcmp(key_, key))
 113                 return 0;
 114         if (use_key_regexp && regexec(key_regexp, key_, 0, NULL, 0))
 115                 return 0;
 116         if (regexp != NULL &&
 117             (do_not_match ^ !!regexec(regexp, (value_?value_:""), 0, NULL, 0)))
 118                 return 0;
 119
 120         ALLOC_GROW(values->items, values->nr + 1, values->alloc);
 121         buf = &values->items[values->nr++];
 122         strbuf_init(buf, 0);
 123
 124         if (show_keys) {
 125                 strbuf_addstr(buf, key_);
 126                 must_print_delim = 1;
 127         }
 128         if (types == TYPE_INT)
 129                 sprintf(value, "%d", git_config_int(key_, value_?value_:""));
 130         else if (types == TYPE_BOOL)
 131                 vptr = git_config_bool(key_, value_) ? "true" : "false";
 132         else if (types == TYPE_BOOL_OR_INT) {
 133                 int is_bool, v;
 134                 v = git_config_bool_or_int(key_, value_, &is_bool);
 135                 if (is_bool)
 136                         vptr = v ? "true" : "false";
 137                 else
 138                         sprintf(value, "%d", v);
 139         } else if (types == TYPE_PATH) {
 140                 if (git_config_pathname(&vptr, key_, value_) < 0)
 141                         return -1;
 142                 must_free_vptr = 1;
 143         } else if (value_) {
 144                 vptr = value_;
 145         } else {
 146                 /* Just show the key name */
 147                 vptr = "";
 148                 must_print_delim = 0;
 149         }
 150
 151         if (must_print_delim)
 152                 strbuf_addch(buf, key_delim);
 153         strbuf_addstr(buf, vptr);
 154         strbuf_addch(buf, term);
 155
 156         if (must_free_vptr)
 157                 /* If vptr must be freed, it's a pointer to a
 158                  * dynamically allocated buffer, it's safe to cast to
 159                  * const.
 160                 */
 161                 free((char *)vptr);
 162
 163         return 0;
 164 }
 165
 166 static int get_value(const char *key_, const char *regex_)
 167 {
 168         int ret = CONFIG_GENERIC_ERROR;
 169         struct strbuf_list values = {NULL};
 170         int i;
 171
 172         if (use_key_regexp) {
 173                 char *tl;
 174
 175                 /*
 176                  * NEEDSWORK: this naive pattern lowercasing obviously does not
 177                  * work for more complex patterns like "^[^.]*Foo.*bar".
 178                  * Perhaps we should deprecate this altogether someday.
 179                  */
 180
 181                 key = xstrdup(key_);
 182                 for (tl = key + strlen(key) - 1;
 183                      tl >= key && *tl != '.';
 184                      tl--)
 185                         *tl = tolower(*tl);
 186                 for (tl = key; *tl && *tl != '.'; tl++)
 187                         *tl = tolower(*tl);
 188
 189                 key_regexp = (regex_t*)xmalloc(sizeof(regex_t));
 190                 if (regcomp(key_regexp, key, REG_EXTENDED)) {
 191                         fprintf(stderr, "Invalid key pattern: %s\n", key_);
 192                         free(key_regexp);
 193                         key_regexp = NULL;
 194                         ret = CONFIG_INVALID_PATTERN;
 195                         goto free_strings;
 196                 }
 197         } else {
 198                 if (git_config_parse_key(key_, &key, NULL)) {
 199                         ret = CONFIG_INVALID_KEY;
 200                         goto free_strings;
 201                 }
 202         }
 203
 204         if (regex_) {
 205                 if (regex_[0] == '!') {
 206                         do_not_match = 1;
 207                         regex_++;
 208                 }
 209
 210                 regexp = (regex_t*)xmalloc(sizeof(regex_t));
 211                 if (regcomp(regexp, regex_, REG_EXTENDED)) {
 212                         fprintf(stderr, "Invalid pattern: %s\n", regex_);
 213                         free(regexp);
 214                         regexp = NULL;
 215                         ret = CONFIG_INVALID_PATTERN;
 216                         goto free_strings;
 217                 }
 218         }
 219
 220         git_config_with_options(collect_config, &values,
 221                                 given_config_file, respect_includes);
 222
 223         ret = !values.nr;
 224
 225         for (i = 0; i < values.nr; i++) {
 226                 struct strbuf *buf = values.items + i;
 227                 if (do_all || i == values.nr - 1)
 228                         fwrite(buf->buf, 1, buf->len, stdout);
 229                 strbuf_release(buf);
 230         }
 231         free(values.items);
 232
 233 free_strings:
 234         free(key);
 235         if (key_regexp) {
 236                 regfree(key_regexp);
 237                 free(key_regexp);
 238         }
 239         if (regexp) {
 240                 regfree(regexp);
 241                 free(regexp);
 242         }
 243
 244         return ret;
 245 }
 246
 247 static char *normalize_value(const char *key, const char *value)
 248 {
 249         char *normalized;
 250
 251         if (!value)
 252                 return NULL;
 253
 254         if (types == 0 || types == TYPE_PATH)
 255                 /*
 256                  * We don't do normalization for TYPE_PATH here: If
 257                  * the path is like ~/foobar/, we prefer to store
 258                  * "~/foobar/" in the config file, and to expand the ~
 259                  * when retrieving the value.
 260                  */
 261                 normalized = xstrdup(value);
 262         else {
 263                 normalized = xmalloc(64);
 264                 if (types == TYPE_INT) {
 265                         int v = git_config_int(key, value);
 266                         sprintf(normalized, "%d", v);
 267                 }
 268                 else if (types == TYPE_BOOL)
 269                         sprintf(normalized, "%s",
 270                                 git_config_bool(key, value) ? "true" : "false");
 271                 else if (types == TYPE_BOOL_OR_INT) {
 272                         int is_bool, v;
 273                         v = git_config_bool_or_int(key, value, &is_bool);
 274                         if (!is_bool)
 275                                 sprintf(normalized, "%d", v);
 276                         else
 277                                 sprintf(normalized, "%s", v ? "true" : "false");
 278                 }
 279         }
 280
 281         return normalized;
 282 }
 283
 284 static int get_color_found;
 285 static const char *get_color_slot;
 286 static const char *get_colorbool_slot;
 287 static char parsed_color[COLOR_MAXLEN];
 288
 289 static int git_get_color_config(const char *var, const char *value, void *cb)
 290 {
 291         if (!strcmp(var, get_color_slot)) {
 292                 if (!value)
 293                         config_error_nonbool(var);
 294                 color_parse(value, var, parsed_color);
 295                 get_color_found = 1;
 296         }
 297         return 0;
 298 }
 299
 300 static void get_color(const char *def_color)
 301 {
 302         get_color_found = 0;
 303         parsed_color[0] = '\0';
 304         git_config_with_options(git_get_color_config, NULL,
 305                                 given_config_file, respect_includes);
 306
 307         if (!get_color_found && def_color)
 308                 color_parse(def_color, "command line", parsed_color);
 309
 310         fputs(parsed_color, stdout);
 311 }
 312
 313 static int get_colorbool_found;
 314 static int get_diff_color_found;
 315 static int get_color_ui_found;
 316 static int git_get_colorbool_config(const char *var, const char *value,
 317                 void *cb)
 318 {
 319         if (!strcmp(var, get_colorbool_slot))
 320                 get_colorbool_found = git_config_colorbool(var, value);
 321         else if (!strcmp(var, "diff.color"))
 322                 get_diff_color_found = git_config_colorbool(var, value);
 323         else if (!strcmp(var, "color.ui"))
 324                 get_color_ui_found = git_config_colorbool(var, value);
 325         return 0;
 326 }
 327
 328 static int get_colorbool(int print)
 329 {
 330         get_colorbool_found = -1;
 331         get_diff_color_found = -1;
 332         git_config_with_options(git_get_colorbool_config, NULL,
 333                                 given_config_file, respect_includes);
 334
 335         if (get_colorbool_found < 0) {
 336                 if (!strcmp(get_colorbool_slot, "color.diff"))
 337                         get_colorbool_found = get_diff_color_found;
 338                 if (get_colorbool_found < 0)
 339                         get_colorbool_found = get_color_ui_found;
 340         }
 341
 342         get_colorbool_found = want_color(get_colorbool_found);
 343
 344         if (print) {
 345                 printf("%s\n", get_colorbool_found ? "true" : "false");
 346                 return 0;
 347         } else
 348                 return get_colorbool_found ? 0 : 1;
 349 }
 350
 351 int cmd_config(int argc, const char **argv, const char *prefix)
 352 {
 353         int nongit = !startup_info->have_repository;
 354         char *value;
 355
 356         given_config_file = getenv(CONFIG_ENVIRONMENT);
 357
 358         argc = parse_options(argc, argv, prefix, builtin_config_options,
 359                              builtin_config_usage,
 360                              PARSE_OPT_STOP_AT_NON_OPTION);
 361
 362         if (use_global_config + use_system_config + use_local_config + !!given_config_file > 1) {
 363                 error("only one config file at a time.");
 364                 usage_with_options(builtin_config_usage, builtin_config_options);
 365         }
 366
 367         if (use_global_config) {
 368                 char *user_config = NULL;
 369                 char *xdg_config = NULL;
 370
 371                 home_config_paths(&user_config, &xdg_config, "config");
 372
 373                 if (!user_config)
 374                         /*
 375                          * It is unknown if HOME/.gitconfig exists, so
 376                          * we do not know if we should write to XDG
 377                          * location; error out even if XDG_CONFIG_HOME
 378                          * is set and points at a sane location.
 379                          */
 380                         die("$HOME not set");
 381
 382                 if (access_or_warn(user_config, R_OK) &&
 383                     xdg_config && !access_or_warn(xdg_config, R_OK))
 384                         given_config_file = xdg_config;
 385                 else
 386                         given_config_file = user_config;
 387         }
 388         else if (use_system_config)
 389                 given_config_file = git_etc_gitconfig();
 390         else if (use_local_config)
 391                 given_config_file = git_pathdup("config");
 392         else if (given_config_file) {
 393                 if (!is_absolute_path(given_config_file) && prefix)
 394                         given_config_file =
 395                                 xstrdup(prefix_filename(prefix,
 396                                                         strlen(prefix),
 397                                                         given_config_file));
 398         }
 399
 400         if (respect_includes == -1)
 401                 respect_includes = !given_config_file;
 402
 403         if (end_null) {
 404                 term = '\0';
 405                 delim = '\n';
 406                 key_delim = '\n';
 407         }
 408
 409         if (HAS_MULTI_BITS(types)) {
 410                 error("only one type at a time.");
 411                 usage_with_options(builtin_config_usage, builtin_config_options);
 412         }
 413
 414         if (get_color_slot)
 415             actions |= ACTION_GET_COLOR;
 416         if (get_colorbool_slot)
 417             actions |= ACTION_GET_COLORBOOL;
 418
 419         if ((get_color_slot || get_colorbool_slot) && types) {
 420                 error("--get-color and variable type are incoherent");
 421                 usage_with_options(builtin_config_usage, builtin_config_options);
 422         }
 423
 424         if (HAS_MULTI_BITS(actions)) {
 425                 error("only one action at a time.");
 426                 usage_with_options(builtin_config_usage, builtin_config_options);
 427         }
 428         if (actions == 0)
 429                 switch (argc) {
 430                 case 1: actions = ACTION_GET; break;
 431                 case 2: actions = ACTION_SET; break;
 432                 case 3: actions = ACTION_SET_ALL; break;
 433                 default:
 434                         usage_with_options(builtin_config_usage, builtin_config_options);
 435                 }
 436
 437         if (actions == ACTION_LIST) {
 438                 check_argc(argc, 0, 0);
 439                 if (git_config_with_options(show_all_config, NULL,
 440                                             given_config_file,
 441                                             respect_includes) < 0) {
 442                         if (given_config_file)
 443                                 die_errno("unable to read config file '%s'",
 444                                           given_config_file);
 445                         else
 446                                 die("error processing config file(s)");
 447                 }
 448         }
 449         else if (actions == ACTION_EDIT) {
 450                 check_argc(argc, 0, 0);
 451                 if (!given_config_file && nongit)
 452                         die("not in a git directory");
 453                 git_config(git_default_config, NULL);
 454                 launch_editor(given_config_file ?
 455                               given_config_file : git_path("config"),
 456                               NULL, NULL);
 457         }
 458         else if (actions == ACTION_SET) {
 459                 int ret;
 460                 check_argc(argc, 2, 2);
 461                 value = normalize_value(argv[0], argv[1]);
 462                 ret = git_config_set_in_file(given_config_file, argv[0], value);
 463                 if (ret == CONFIG_NOTHING_SET)
 464                         error("cannot overwrite multiple values with a single value\n"
 465                         "       Use a regexp, --add or --replace-all to change %s.", argv[0]);
 466                 return ret;
 467         }
 468         else if (actions == ACTION_SET_ALL) {
 469                 check_argc(argc, 2, 3);
 470                 value = normalize_value(argv[0], argv[1]);
 471                 return git_config_set_multivar_in_file(given_config_file,
 472                                                        argv[0], value, argv[2], 0);
 473         }
 474         else if (actions == ACTION_ADD) {
 475                 check_argc(argc, 2, 2);
 476                 value = normalize_value(argv[0], argv[1]);
 477                 return git_config_set_multivar_in_file(given_config_file,
 478                                                        argv[0], value, "^$", 0);
 479         }
 480         else if (actions == ACTION_REPLACE_ALL) {
 481                 check_argc(argc, 2, 3);
 482                 value = normalize_value(argv[0], argv[1]);
 483                 return git_config_set_multivar_in_file(given_config_file,
 484                                                        argv[0], value, argv[2], 1);
 485         }
 486         else if (actions == ACTION_GET) {
 487                 check_argc(argc, 1, 2);
 488                 return get_value(argv[0], argv[1]);
 489         }
 490         else if (actions == ACTION_GET_ALL) {
 491                 do_all = 1;
 492                 check_argc(argc, 1, 2);
 493                 return get_value(argv[0], argv[1]);
 494         }
 495         else if (actions == ACTION_GET_REGEXP) {
 496                 show_keys = 1;
 497                 use_key_regexp = 1;
 498                 do_all = 1;
 499                 check_argc(argc, 1, 2);
 500                 return get_value(argv[0], argv[1]);
 501         }
 502         else if (actions == ACTION_UNSET) {
 503                 check_argc(argc, 1, 2);
 504                 if (argc == 2)
 505                         return git_config_set_multivar_in_file(given_config_file,
 506                                                                argv[0], NULL, argv[1], 0);
 507                 else
 508                         return git_config_set_in_file(given_config_file,
 509                                                       argv[0], NULL);
 510         }
 511         else if (actions == ACTION_UNSET_ALL) {
 512                 check_argc(argc, 1, 2);
 513                 return git_config_set_multivar_in_file(given_config_file,
 514                                                        argv[0], NULL, argv[1], 1);
 515         }
 516         else if (actions == ACTION_RENAME_SECTION) {
 517                 int ret;
 518                 check_argc(argc, 2, 2);
 519                 ret = git_config_rename_section_in_file(given_config_file,
 520                                                         argv[0], argv[1]);
 521                 if (ret < 0)
 522                         return ret;
 523                 if (ret == 0)
 524                         die("No such section!");
 525         }
 526         else if (actions == ACTION_REMOVE_SECTION) {
 527                 int ret;
 528                 check_argc(argc, 1, 1);
 529                 ret = git_config_rename_section_in_file(given_config_file,
 530                                                         argv[0], NULL);
 531                 if (ret < 0)
 532                         return ret;
 533                 if (ret == 0)
 534                         die("No such section!");
 535         }
 536         else if (actions == ACTION_GET_COLOR) {
 537                 get_color(argv[0]);
 538         }
 539         else if (actions == ACTION_GET_COLORBOOL) {
 540                 if (argc == 1)
 541                         color_stdout_is_tty = git_config_bool("command line", argv[0]);
 542                 return get_colorbool(argc != 0);
 543         }
 544
 545         return 0;
 546 }
 547
 548 int cmd_repo_config(int argc, const char **argv, const char *prefix)
 549 {
 550         fprintf(stderr, "WARNING: git repo-config is deprecated in favor of git config.\n");
 551         return cmd_config(argc, argv, prefix);
 552 }