Andrew's git / gitweb.git / builtin/config.c
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builtin / config.con commit reflog expire: cover reflog from all worktrees (c9ef0d9)
   1#include "builtin.h"
   2#include "cache.h"
   3#include "config.h"
   4#include "color.h"
   5#include "parse-options.h"
   6#include "urlmatch.h"
   7#include "quote.h"
   8
   9static const char *const builtin_config_usage[] = {
  10        N_("git config [<options>]"),
  11        NULL
  12};
  13
  14static char *key;
  15static regex_t *key_regexp;
  16static regex_t *regexp;
  17static int show_keys;
  18static int omit_values;
  19static int use_key_regexp;
  20static int do_all;
  21static int do_not_match;
  22static char delim = '=';
  23static char key_delim = ' ';
  24static char term = '\n';
  25
  26static int use_global_config, use_system_config, use_local_config;
  27static struct git_config_source given_config_source;
  28static int actions, type;
  29static char *default_value;
  30static int end_null;
  31static int respect_includes_opt = -1;
  32static struct config_options config_options;
  33static int show_origin;
  34
  35#define ACTION_GET (1<<0)
  36#define ACTION_GET_ALL (1<<1)
  37#define ACTION_GET_REGEXP (1<<2)
  38#define ACTION_REPLACE_ALL (1<<3)
  39#define ACTION_ADD (1<<4)
  40#define ACTION_UNSET (1<<5)
  41#define ACTION_UNSET_ALL (1<<6)
  42#define ACTION_RENAME_SECTION (1<<7)
  43#define ACTION_REMOVE_SECTION (1<<8)
  44#define ACTION_LIST (1<<9)
  45#define ACTION_EDIT (1<<10)
  46#define ACTION_SET (1<<11)
  47#define ACTION_SET_ALL (1<<12)
  48#define ACTION_GET_COLOR (1<<13)
  49#define ACTION_GET_COLORBOOL (1<<14)
  50#define ACTION_GET_URLMATCH (1<<15)
  51
  52/*
  53 * The actions "ACTION_LIST | ACTION_GET_*" which may produce more than
  54 * one line of output and which should therefore be paged.
  55 */
  56#define PAGING_ACTIONS (ACTION_LIST | ACTION_GET_ALL | \
  57                        ACTION_GET_REGEXP | ACTION_GET_URLMATCH)
  58
  59#define TYPE_BOOL               1
  60#define TYPE_INT                2
  61#define TYPE_BOOL_OR_INT        3
  62#define TYPE_PATH               4
  63#define TYPE_EXPIRY_DATE        5
  64#define TYPE_COLOR              6
  65
  66#define OPT_CALLBACK_VALUE(s, l, v, h, i) \
  67        { OPTION_CALLBACK, (s), (l), (v), NULL, (h), PARSE_OPT_NOARG | \
  68        PARSE_OPT_NONEG, option_parse_type, (i) }
  69
  70static NORETURN void usage_builtin_config(void);
  71
  72static int option_parse_type(const struct option *opt, const char *arg,
  73                             int unset)
  74{
  75        int new_type, *to_type;
  76
  77        if (unset) {
  78                *((int *) opt->value) = 0;
  79                return 0;
  80        }
  81
  82        /*
  83         * To support '--<type>' style flags, begin with new_type equal to
  84         * opt->defval.
  85         */
  86        new_type = opt->defval;
  87        if (!new_type) {
  88                if (!strcmp(arg, "bool"))
  89                        new_type = TYPE_BOOL;
  90                else if (!strcmp(arg, "int"))
  91                        new_type = TYPE_INT;
  92                else if (!strcmp(arg, "bool-or-int"))
  93                        new_type = TYPE_BOOL_OR_INT;
  94                else if (!strcmp(arg, "path"))
  95                        new_type = TYPE_PATH;
  96                else if (!strcmp(arg, "expiry-date"))
  97                        new_type = TYPE_EXPIRY_DATE;
  98                else if (!strcmp(arg, "color"))
  99                        new_type = TYPE_COLOR;
 100                else
 101                        die(_("unrecognized --type argument, %s"), arg);
 102        }
 103
 104        to_type = opt->value;
 105        if (*to_type && *to_type != new_type) {
 106                /*
 107                 * Complain when there is a new type not equal to the old type.
 108                 * This allows for combinations like '--int --type=int' and
 109                 * '--type=int --type=int', but disallows ones like '--type=bool
 110                 * --int' and '--type=bool
 111                 * --type=int'.
 112                 */
 113                error(_("only one type at a time"));
 114                usage_builtin_config();
 115        }
 116        *to_type = new_type;
 117
 118        return 0;
 119}
 120
 121static struct option builtin_config_options[] = {
 122        OPT_GROUP(N_("Config file location")),
 123        OPT_BOOL(0, "global", &use_global_config, N_("use global config file")),
 124        OPT_BOOL(0, "system", &use_system_config, N_("use system config file")),
 125        OPT_BOOL(0, "local", &use_local_config, N_("use repository config file")),
 126        OPT_STRING('f', "file", &given_config_source.file, N_("file"), N_("use given config file")),
 127        OPT_STRING(0, "blob", &given_config_source.blob, N_("blob-id"), N_("read config from given blob object")),
 128        OPT_GROUP(N_("Action")),
 129        OPT_BIT(0, "get", &actions, N_("get value: name [value-regex]"), ACTION_GET),
 130        OPT_BIT(0, "get-all", &actions, N_("get all values: key [value-regex]"), ACTION_GET_ALL),
 131        OPT_BIT(0, "get-regexp", &actions, N_("get values for regexp: name-regex [value-regex]"), ACTION_GET_REGEXP),
 132        OPT_BIT(0, "get-urlmatch", &actions, N_("get value specific for the URL: section[.var] URL"), ACTION_GET_URLMATCH),
 133        OPT_BIT(0, "replace-all", &actions, N_("replace all matching variables: name value [value_regex]"), ACTION_REPLACE_ALL),
 134        OPT_BIT(0, "add", &actions, N_("add a new variable: name value"), ACTION_ADD),
 135        OPT_BIT(0, "unset", &actions, N_("remove a variable: name [value-regex]"), ACTION_UNSET),
 136        OPT_BIT(0, "unset-all", &actions, N_("remove all matches: name [value-regex]"), ACTION_UNSET_ALL),
 137        OPT_BIT(0, "rename-section", &actions, N_("rename section: old-name new-name"), ACTION_RENAME_SECTION),
 138        OPT_BIT(0, "remove-section", &actions, N_("remove a section: name"), ACTION_REMOVE_SECTION),
 139        OPT_BIT('l', "list", &actions, N_("list all"), ACTION_LIST),
 140        OPT_BIT('e', "edit", &actions, N_("open an editor"), ACTION_EDIT),
 141        OPT_BIT(0, "get-color", &actions, N_("find the color configured: slot [default]"), ACTION_GET_COLOR),
 142        OPT_BIT(0, "get-colorbool", &actions, N_("find the color setting: slot [stdout-is-tty]"), ACTION_GET_COLORBOOL),
 143        OPT_GROUP(N_("Type")),
 144        OPT_CALLBACK('t', "type", &type, "", N_("value is given this type"), option_parse_type),
 145        OPT_CALLBACK_VALUE(0, "bool", &type, N_("value is \"true\" or \"false\""), TYPE_BOOL),
 146        OPT_CALLBACK_VALUE(0, "int", &type, N_("value is decimal number"), TYPE_INT),
 147        OPT_CALLBACK_VALUE(0, "bool-or-int", &type, N_("value is --bool or --int"), TYPE_BOOL_OR_INT),
 148        OPT_CALLBACK_VALUE(0, "path", &type, N_("value is a path (file or directory name)"), TYPE_PATH),
 149        OPT_CALLBACK_VALUE(0, "expiry-date", &type, N_("value is an expiry date"), TYPE_EXPIRY_DATE),
 150        OPT_GROUP(N_("Other")),
 151        OPT_BOOL('z', "null", &end_null, N_("terminate values with NUL byte")),
 152        OPT_BOOL(0, "name-only", &omit_values, N_("show variable names only")),
 153        OPT_BOOL(0, "includes", &respect_includes_opt, N_("respect include directives on lookup")),
 154        OPT_BOOL(0, "show-origin", &show_origin, N_("show origin of config (file, standard input, blob, command line)")),
 155        OPT_STRING(0, "default", &default_value, N_("value"), N_("with --get, use default value when missing entry")),
 156        OPT_END(),
 157};
 158
 159static NORETURN void usage_builtin_config(void)
 160{
 161        usage_with_options(builtin_config_usage, builtin_config_options);
 162}
 163
 164static void check_argc(int argc, int min, int max) {
 165        if (argc >= min && argc <= max)
 166                return;
 167        if (min == max)
 168                error(_("wrong number of arguments, should be %d"), min);
 169        else
 170                error(_("wrong number of arguments, should be from %d to %d"),
 171                      min, max);
 172        usage_builtin_config();
 173}
 174
 175static void show_config_origin(struct strbuf *buf)
 176{
 177        const char term = end_null ? '\0' : '\t';
 178
 179        strbuf_addstr(buf, current_config_origin_type());
 180        strbuf_addch(buf, ':');
 181        if (end_null)
 182                strbuf_addstr(buf, current_config_name());
 183        else
 184                quote_c_style(current_config_name(), buf, NULL, 0);
 185        strbuf_addch(buf, term);
 186}
 187
 188static int show_all_config(const char *key_, const char *value_, void *cb)
 189{
 190        if (show_origin) {
 191                struct strbuf buf = STRBUF_INIT;
 192                show_config_origin(&buf);
 193                /* Use fwrite as "buf" can contain \0's if "end_null" is set. */
 194                fwrite(buf.buf, 1, buf.len, stdout);
 195                strbuf_release(&buf);
 196        }
 197        if (!omit_values && value_)
 198                printf("%s%c%s%c", key_, delim, value_, term);
 199        else
 200                printf("%s%c", key_, term);
 201        return 0;
 202}
 203
 204struct strbuf_list {
 205        struct strbuf *items;
 206        int nr;
 207        int alloc;
 208};
 209
 210static int format_config(struct strbuf *buf, const char *key_, const char *value_)
 211{
 212        if (show_origin)
 213                show_config_origin(buf);
 214        if (show_keys)
 215                strbuf_addstr(buf, key_);
 216        if (!omit_values) {
 217                if (show_keys)
 218                        strbuf_addch(buf, key_delim);
 219
 220                if (type == TYPE_INT)
 221                        strbuf_addf(buf, "%"PRId64,
 222                                    git_config_int64(key_, value_ ? value_ : ""));
 223                else if (type == TYPE_BOOL)
 224                        strbuf_addstr(buf, git_config_bool(key_, value_) ?
 225                                      "true" : "false");
 226                else if (type == TYPE_BOOL_OR_INT) {
 227                        int is_bool, v;
 228                        v = git_config_bool_or_int(key_, value_, &is_bool);
 229                        if (is_bool)
 230                                strbuf_addstr(buf, v ? "true" : "false");
 231                        else
 232                                strbuf_addf(buf, "%d", v);
 233                } else if (type == TYPE_PATH) {
 234                        const char *v;
 235                        if (git_config_pathname(&v, key_, value_) < 0)
 236                                return -1;
 237                        strbuf_addstr(buf, v);
 238                        free((char *)v);
 239                } else if (type == TYPE_EXPIRY_DATE) {
 240                        timestamp_t t;
 241                        if (git_config_expiry_date(&t, key_, value_) < 0)
 242                                return -1;
 243                        strbuf_addf(buf, "%"PRItime, t);
 244                } else if (type == TYPE_COLOR) {
 245                        char v[COLOR_MAXLEN];
 246                        if (git_config_color(v, key_, value_) < 0)
 247                                return -1;
 248                        strbuf_addstr(buf, v);
 249                } else if (value_) {
 250                        strbuf_addstr(buf, value_);
 251                } else {
 252                        /* Just show the key name; back out delimiter */
 253                        if (show_keys)
 254                                strbuf_setlen(buf, buf->len - 1);
 255                }
 256        }
 257        strbuf_addch(buf, term);
 258        return 0;
 259}
 260
 261static int collect_config(const char *key_, const char *value_, void *cb)
 262{
 263        struct strbuf_list *values = cb;
 264
 265        if (!use_key_regexp && strcmp(key_, key))
 266                return 0;
 267        if (use_key_regexp && regexec(key_regexp, key_, 0, NULL, 0))
 268                return 0;
 269        if (regexp != NULL &&
 270            (do_not_match ^ !!regexec(regexp, (value_?value_:""), 0, NULL, 0)))
 271                return 0;
 272
 273        ALLOC_GROW(values->items, values->nr + 1, values->alloc);
 274        strbuf_init(&values->items[values->nr], 0);
 275
 276        return format_config(&values->items[values->nr++], key_, value_);
 277}
 278
 279static int get_value(const char *key_, const char *regex_)
 280{
 281        int ret = CONFIG_GENERIC_ERROR;
 282        struct strbuf_list values = {NULL};
 283        int i;
 284
 285        if (use_key_regexp) {
 286                char *tl;
 287
 288                /*
 289                 * NEEDSWORK: this naive pattern lowercasing obviously does not
 290                 * work for more complex patterns like "^[^.]*Foo.*bar".
 291                 * Perhaps we should deprecate this altogether someday.
 292                 */
 293
 294                key = xstrdup(key_);
 295                for (tl = key + strlen(key) - 1;
 296                     tl >= key && *tl != '.';
 297                     tl--)
 298                        *tl = tolower(*tl);
 299                for (tl = key; *tl && *tl != '.'; tl++)
 300                        *tl = tolower(*tl);
 301
 302                key_regexp = (regex_t*)xmalloc(sizeof(regex_t));
 303                if (regcomp(key_regexp, key, REG_EXTENDED)) {
 304                        error(_("invalid key pattern: %s"), key_);
 305                        FREE_AND_NULL(key_regexp);
 306                        ret = CONFIG_INVALID_PATTERN;
 307                        goto free_strings;
 308                }
 309        } else {
 310                if (git_config_parse_key(key_, &key, NULL)) {
 311                        ret = CONFIG_INVALID_KEY;
 312                        goto free_strings;
 313                }
 314        }
 315
 316        if (regex_) {
 317                if (regex_[0] == '!') {
 318                        do_not_match = 1;
 319                        regex_++;
 320                }
 321
 322                regexp = (regex_t*)xmalloc(sizeof(regex_t));
 323                if (regcomp(regexp, regex_, REG_EXTENDED)) {
 324                        error(_("invalid pattern: %s"), regex_);
 325                        FREE_AND_NULL(regexp);
 326                        ret = CONFIG_INVALID_PATTERN;
 327                        goto free_strings;
 328                }
 329        }
 330
 331        config_with_options(collect_config, &values,
 332                            &given_config_source, &config_options);
 333
 334        if (!values.nr && default_value) {
 335                struct strbuf *item;
 336                ALLOC_GROW(values.items, values.nr + 1, values.alloc);
 337                item = &values.items[values.nr++];
 338                strbuf_init(item, 0);
 339                if (format_config(item, key_, default_value) < 0)
 340                        die(_("failed to format default config value: %s"),
 341                                default_value);
 342        }
 343
 344        ret = !values.nr;
 345
 346        for (i = 0; i < values.nr; i++) {
 347                struct strbuf *buf = values.items + i;
 348                if (do_all || i == values.nr - 1)
 349                        fwrite(buf->buf, 1, buf->len, stdout);
 350                strbuf_release(buf);
 351        }
 352        free(values.items);
 353
 354free_strings:
 355        free(key);
 356        if (key_regexp) {
 357                regfree(key_regexp);
 358                free(key_regexp);
 359        }
 360        if (regexp) {
 361                regfree(regexp);
 362                free(regexp);
 363        }
 364
 365        return ret;
 366}
 367
 368static char *normalize_value(const char *key, const char *value)
 369{
 370        if (!value)
 371                return NULL;
 372
 373        if (type == 0 || type == TYPE_PATH || type == TYPE_EXPIRY_DATE)
 374                /*
 375                 * We don't do normalization for TYPE_PATH here: If
 376                 * the path is like ~/foobar/, we prefer to store
 377                 * "~/foobar/" in the config file, and to expand the ~
 378                 * when retrieving the value.
 379                 * Also don't do normalization for expiry dates.
 380                 */
 381                return xstrdup(value);
 382        if (type == TYPE_INT)
 383                return xstrfmt("%"PRId64, git_config_int64(key, value));
 384        if (type == TYPE_BOOL)
 385                return xstrdup(git_config_bool(key, value) ?  "true" : "false");
 386        if (type == TYPE_BOOL_OR_INT) {
 387                int is_bool, v;
 388                v = git_config_bool_or_int(key, value, &is_bool);
 389                if (!is_bool)
 390                        return xstrfmt("%d", v);
 391                else
 392                        return xstrdup(v ? "true" : "false");
 393        }
 394        if (type == TYPE_COLOR) {
 395                char v[COLOR_MAXLEN];
 396                if (git_config_color(v, key, value))
 397                        die(_("cannot parse color '%s'"), value);
 398
 399                /*
 400                 * The contents of `v` now contain an ANSI escape
 401                 * sequence, not suitable for including within a
 402                 * configuration file. Treat the above as a
 403                 * "sanity-check", and return the given value, which we
 404                 * know is representable as valid color code.
 405                 */
 406                return xstrdup(value);
 407        }
 408
 409        BUG("cannot normalize type %d", type);
 410}
 411
 412static int get_color_found;
 413static const char *get_color_slot;
 414static const char *get_colorbool_slot;
 415static char parsed_color[COLOR_MAXLEN];
 416
 417static int git_get_color_config(const char *var, const char *value, void *cb)
 418{
 419        if (!strcmp(var, get_color_slot)) {
 420                if (!value)
 421                        config_error_nonbool(var);
 422                if (color_parse(value, parsed_color) < 0)
 423                        return -1;
 424                get_color_found = 1;
 425        }
 426        return 0;
 427}
 428
 429static void get_color(const char *var, const char *def_color)
 430{
 431        get_color_slot = var;
 432        get_color_found = 0;
 433        parsed_color[0] = '\0';
 434        config_with_options(git_get_color_config, NULL,
 435                            &given_config_source, &config_options);
 436
 437        if (!get_color_found && def_color) {
 438                if (color_parse(def_color, parsed_color) < 0)
 439                        die(_("unable to parse default color value"));
 440        }
 441
 442        fputs(parsed_color, stdout);
 443}
 444
 445static int get_colorbool_found;
 446static int get_diff_color_found;
 447static int get_color_ui_found;
 448static int git_get_colorbool_config(const char *var, const char *value,
 449                void *cb)
 450{
 451        if (!strcmp(var, get_colorbool_slot))
 452                get_colorbool_found = git_config_colorbool(var, value);
 453        else if (!strcmp(var, "diff.color"))
 454                get_diff_color_found = git_config_colorbool(var, value);
 455        else if (!strcmp(var, "color.ui"))
 456                get_color_ui_found = git_config_colorbool(var, value);
 457        return 0;
 458}
 459
 460static int get_colorbool(const char *var, int print)
 461{
 462        get_colorbool_slot = var;
 463        get_colorbool_found = -1;
 464        get_diff_color_found = -1;
 465        get_color_ui_found = -1;
 466        config_with_options(git_get_colorbool_config, NULL,
 467                            &given_config_source, &config_options);
 468
 469        if (get_colorbool_found < 0) {
 470                if (!strcmp(get_colorbool_slot, "color.diff"))
 471                        get_colorbool_found = get_diff_color_found;
 472                if (get_colorbool_found < 0)
 473                        get_colorbool_found = get_color_ui_found;
 474        }
 475
 476        if (get_colorbool_found < 0)
 477                /* default value if none found in config */
 478                get_colorbool_found = GIT_COLOR_AUTO;
 479
 480        get_colorbool_found = want_color(get_colorbool_found);
 481
 482        if (print) {
 483                printf("%s\n", get_colorbool_found ? "true" : "false");
 484                return 0;
 485        } else
 486                return get_colorbool_found ? 0 : 1;
 487}
 488
 489static void check_write(void)
 490{
 491        if (!given_config_source.file && !startup_info->have_repository)
 492                die(_("not in a git directory"));
 493
 494        if (given_config_source.use_stdin)
 495                die(_("writing to stdin is not supported"));
 496
 497        if (given_config_source.blob)
 498                die(_("writing config blobs is not supported"));
 499}
 500
 501struct urlmatch_current_candidate_value {
 502        char value_is_null;
 503        struct strbuf value;
 504};
 505
 506static int urlmatch_collect_fn(const char *var, const char *value, void *cb)
 507{
 508        struct string_list *values = cb;
 509        struct string_list_item *item = string_list_insert(values, var);
 510        struct urlmatch_current_candidate_value *matched = item->util;
 511
 512        if (!matched) {
 513                matched = xmalloc(sizeof(*matched));
 514                strbuf_init(&matched->value, 0);
 515                item->util = matched;
 516        } else {
 517                strbuf_reset(&matched->value);
 518        }
 519
 520        if (value) {
 521                strbuf_addstr(&matched->value, value);
 522                matched->value_is_null = 0;
 523        } else {
 524                matched->value_is_null = 1;
 525        }
 526        return 0;
 527}
 528
 529static int get_urlmatch(const char *var, const char *url)
 530{
 531        int ret;
 532        char *section_tail;
 533        struct string_list_item *item;
 534        struct urlmatch_config config = { STRING_LIST_INIT_DUP };
 535        struct string_list values = STRING_LIST_INIT_DUP;
 536
 537        config.collect_fn = urlmatch_collect_fn;
 538        config.cascade_fn = NULL;
 539        config.cb = &values;
 540
 541        if (!url_normalize(url, &config.url))
 542                die("%s", config.url.err);
 543
 544        config.section = xstrdup_tolower(var);
 545        section_tail = strchr(config.section, '.');
 546        if (section_tail) {
 547                *section_tail = '\0';
 548                config.key = section_tail + 1;
 549                show_keys = 0;
 550        } else {
 551                config.key = NULL;
 552                show_keys = 1;
 553        }
 554
 555        config_with_options(urlmatch_config_entry, &config,
 556                            &given_config_source, &config_options);
 557
 558        ret = !values.nr;
 559
 560        for_each_string_list_item(item, &values) {
 561                struct urlmatch_current_candidate_value *matched = item->util;
 562                struct strbuf buf = STRBUF_INIT;
 563
 564                format_config(&buf, item->string,
 565                              matched->value_is_null ? NULL : matched->value.buf);
 566                fwrite(buf.buf, 1, buf.len, stdout);
 567                strbuf_release(&buf);
 568
 569                strbuf_release(&matched->value);
 570        }
 571        string_list_clear(&config.vars, 1);
 572        string_list_clear(&values, 1);
 573        free(config.url.url);
 574
 575        free((void *)config.section);
 576        return ret;
 577}
 578
 579static char *default_user_config(void)
 580{
 581        struct strbuf buf = STRBUF_INIT;
 582        strbuf_addf(&buf,
 583                    _("# This is Git's per-user configuration file.\n"
 584                      "[user]\n"
 585                      "# Please adapt and uncomment the following lines:\n"
 586                      "#        name = %s\n"
 587                      "#        email = %s\n"),
 588                    ident_default_name(),
 589                    ident_default_email());
 590        return strbuf_detach(&buf, NULL);
 591}
 592
 593int cmd_config(int argc, const char **argv, const char *prefix)
 594{
 595        int nongit = !startup_info->have_repository;
 596        char *value;
 597
 598        given_config_source.file = getenv(CONFIG_ENVIRONMENT);
 599
 600        argc = parse_options(argc, argv, prefix, builtin_config_options,
 601                             builtin_config_usage,
 602                             PARSE_OPT_STOP_AT_NON_OPTION);
 603
 604        if (use_global_config + use_system_config + use_local_config +
 605            !!given_config_source.file + !!given_config_source.blob > 1) {
 606                error(_("only one config file at a time"));
 607                usage_builtin_config();
 608        }
 609
 610        if (use_local_config && nongit)
 611                die(_("--local can only be used inside a git repository"));
 612
 613        if (given_config_source.blob && nongit)
 614                die(_("--blob can only be used inside a git repository"));
 615
 616        if (given_config_source.file &&
 617                        !strcmp(given_config_source.file, "-")) {
 618                given_config_source.file = NULL;
 619                given_config_source.use_stdin = 1;
 620        }
 621
 622        if (use_global_config) {
 623                char *user_config = expand_user_path("~/.gitconfig", 0);
 624                char *xdg_config = xdg_config_home("config");
 625
 626                if (!user_config)
 627                        /*
 628                         * It is unknown if HOME/.gitconfig exists, so
 629                         * we do not know if we should write to XDG
 630                         * location; error out even if XDG_CONFIG_HOME
 631                         * is set and points at a sane location.
 632                         */
 633                        die(_("$HOME not set"));
 634
 635                if (access_or_warn(user_config, R_OK, 0) &&
 636                    xdg_config && !access_or_warn(xdg_config, R_OK, 0)) {
 637                        given_config_source.file = xdg_config;
 638                        free(user_config);
 639                } else {
 640                        given_config_source.file = user_config;
 641                        free(xdg_config);
 642                }
 643        }
 644        else if (use_system_config)
 645                given_config_source.file = git_etc_gitconfig();
 646        else if (use_local_config)
 647                given_config_source.file = git_pathdup("config");
 648        else if (given_config_source.file) {
 649                if (!is_absolute_path(given_config_source.file) && prefix)
 650                        given_config_source.file =
 651                                prefix_filename(prefix, given_config_source.file);
 652        }
 653
 654        if (respect_includes_opt == -1)
 655                config_options.respect_includes = !given_config_source.file;
 656        else
 657                config_options.respect_includes = respect_includes_opt;
 658        if (!nongit) {
 659                config_options.commondir = get_git_common_dir();
 660                config_options.git_dir = get_git_dir();
 661        }
 662
 663        if (end_null) {
 664                term = '\0';
 665                delim = '\n';
 666                key_delim = '\n';
 667        }
 668
 669        if ((actions & (ACTION_GET_COLOR|ACTION_GET_COLORBOOL)) && type) {
 670                error(_("--get-color and variable type are incoherent"));
 671                usage_builtin_config();
 672        }
 673
 674        if (HAS_MULTI_BITS(actions)) {
 675                error(_("only one action at a time"));
 676                usage_builtin_config();
 677        }
 678        if (actions == 0)
 679                switch (argc) {
 680                case 1: actions = ACTION_GET; break;
 681                case 2: actions = ACTION_SET; break;
 682                case 3: actions = ACTION_SET_ALL; break;
 683                default:
 684                        usage_builtin_config();
 685                }
 686        if (omit_values &&
 687            !(actions == ACTION_LIST || actions == ACTION_GET_REGEXP)) {
 688                error(_("--name-only is only applicable to --list or --get-regexp"));
 689                usage_builtin_config();
 690        }
 691
 692        if (show_origin && !(actions &
 693                (ACTION_GET|ACTION_GET_ALL|ACTION_GET_REGEXP|ACTION_LIST))) {
 694                error(_("--show-origin is only applicable to --get, --get-all, "
 695                        "--get-regexp, and --list"));
 696                usage_builtin_config();
 697        }
 698
 699        if (default_value && !(actions & ACTION_GET)) {
 700                error(_("--default is only applicable to --get"));
 701                usage_builtin_config();
 702        }
 703
 704        if (actions & PAGING_ACTIONS)
 705                setup_auto_pager("config", 1);
 706
 707        if (actions == ACTION_LIST) {
 708                check_argc(argc, 0, 0);
 709                if (config_with_options(show_all_config, NULL,
 710                                        &given_config_source,
 711                                        &config_options) < 0) {
 712                        if (given_config_source.file)
 713                                die_errno(_("unable to read config file '%s'"),
 714                                          given_config_source.file);
 715                        else
 716                                die(_("error processing config file(s)"));
 717                }
 718        }
 719        else if (actions == ACTION_EDIT) {
 720                char *config_file;
 721
 722                check_argc(argc, 0, 0);
 723                if (!given_config_source.file && nongit)
 724                        die(_("not in a git directory"));
 725                if (given_config_source.use_stdin)
 726                        die(_("editing stdin is not supported"));
 727                if (given_config_source.blob)
 728                        die(_("editing blobs is not supported"));
 729                git_config(git_default_config, NULL);
 730                config_file = given_config_source.file ?
 731                                xstrdup(given_config_source.file) :
 732                                git_pathdup("config");
 733                if (use_global_config) {
 734                        int fd = open(config_file, O_CREAT | O_EXCL | O_WRONLY, 0666);
 735                        if (fd >= 0) {
 736                                char *content = default_user_config();
 737                                write_str_in_full(fd, content);
 738                                free(content);
 739                                close(fd);
 740                        }
 741                        else if (errno != EEXIST)
 742                                die_errno(_("cannot create configuration file %s"), config_file);
 743                }
 744                launch_editor(config_file, NULL, NULL);
 745                free(config_file);
 746        }
 747        else if (actions == ACTION_SET) {
 748                int ret;
 749                check_write();
 750                check_argc(argc, 2, 2);
 751                value = normalize_value(argv[0], argv[1]);
 752                UNLEAK(value);
 753                ret = git_config_set_in_file_gently(given_config_source.file, argv[0], value);
 754                if (ret == CONFIG_NOTHING_SET)
 755                        error(_("cannot overwrite multiple values with a single value\n"
 756                        "       Use a regexp, --add or --replace-all to change %s."), argv[0]);
 757                return ret;
 758        }
 759        else if (actions == ACTION_SET_ALL) {
 760                check_write();
 761                check_argc(argc, 2, 3);
 762                value = normalize_value(argv[0], argv[1]);
 763                UNLEAK(value);
 764                return git_config_set_multivar_in_file_gently(given_config_source.file,
 765                                                              argv[0], value, argv[2], 0);
 766        }
 767        else if (actions == ACTION_ADD) {
 768                check_write();
 769                check_argc(argc, 2, 2);
 770                value = normalize_value(argv[0], argv[1]);
 771                UNLEAK(value);
 772                return git_config_set_multivar_in_file_gently(given_config_source.file,
 773                                                              argv[0], value,
 774                                                              CONFIG_REGEX_NONE, 0);
 775        }
 776        else if (actions == ACTION_REPLACE_ALL) {
 777                check_write();
 778                check_argc(argc, 2, 3);
 779                value = normalize_value(argv[0], argv[1]);
 780                UNLEAK(value);
 781                return git_config_set_multivar_in_file_gently(given_config_source.file,
 782                                                              argv[0], value, argv[2], 1);
 783        }
 784        else if (actions == ACTION_GET) {
 785                check_argc(argc, 1, 2);
 786                return get_value(argv[0], argv[1]);
 787        }
 788        else if (actions == ACTION_GET_ALL) {
 789                do_all = 1;
 790                check_argc(argc, 1, 2);
 791                return get_value(argv[0], argv[1]);
 792        }
 793        else if (actions == ACTION_GET_REGEXP) {
 794                show_keys = 1;
 795                use_key_regexp = 1;
 796                do_all = 1;
 797                check_argc(argc, 1, 2);
 798                return get_value(argv[0], argv[1]);
 799        }
 800        else if (actions == ACTION_GET_URLMATCH) {
 801                check_argc(argc, 2, 2);
 802                return get_urlmatch(argv[0], argv[1]);
 803        }
 804        else if (actions == ACTION_UNSET) {
 805                check_write();
 806                check_argc(argc, 1, 2);
 807                if (argc == 2)
 808                        return git_config_set_multivar_in_file_gently(given_config_source.file,
 809                                                                      argv[0], NULL, argv[1], 0);
 810                else
 811                        return git_config_set_in_file_gently(given_config_source.file,
 812                                                             argv[0], NULL);
 813        }
 814        else if (actions == ACTION_UNSET_ALL) {
 815                check_write();
 816                check_argc(argc, 1, 2);
 817                return git_config_set_multivar_in_file_gently(given_config_source.file,
 818                                                              argv[0], NULL, argv[1], 1);
 819        }
 820        else if (actions == ACTION_RENAME_SECTION) {
 821                int ret;
 822                check_write();
 823                check_argc(argc, 2, 2);
 824                ret = git_config_rename_section_in_file(given_config_source.file,
 825                                                        argv[0], argv[1]);
 826                if (ret < 0)
 827                        return ret;
 828                if (ret == 0)
 829                        die(_("no such section: %s"), argv[0]);
 830        }
 831        else if (actions == ACTION_REMOVE_SECTION) {
 832                int ret;
 833                check_write();
 834                check_argc(argc, 1, 1);
 835                ret = git_config_rename_section_in_file(given_config_source.file,
 836                                                        argv[0], NULL);
 837                if (ret < 0)
 838                        return ret;
 839                if (ret == 0)
 840                        die(_("no such section: %s"), argv[0]);
 841        }
 842        else if (actions == ACTION_GET_COLOR) {
 843                check_argc(argc, 1, 2);
 844                get_color(argv[0], argv[1]);
 845        }
 846        else if (actions == ACTION_GET_COLORBOOL) {
 847                check_argc(argc, 1, 2);
 848                if (argc == 2)
 849                        color_stdout_is_tty = git_config_bool("command line", argv[1]);
 850                return get_colorbool(argv[0], argc == 2);
 851        }
 852
 853        return 0;
 854}