Andrew's git / gitweb.git / builtin/config.c
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builtin / config.con commit builtin rebase: support `ignore-date` option (53f9e5b)
   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        error("wrong number of arguments");
 168        usage_builtin_config();
 169}
 170
 171static void show_config_origin(struct strbuf *buf)
 172{
 173        const char term = end_null ? '\0' : '\t';
 174
 175        strbuf_addstr(buf, current_config_origin_type());
 176        strbuf_addch(buf, ':');
 177        if (end_null)
 178                strbuf_addstr(buf, current_config_name());
 179        else
 180                quote_c_style(current_config_name(), buf, NULL, 0);
 181        strbuf_addch(buf, term);
 182}
 183
 184static int show_all_config(const char *key_, const char *value_, void *cb)
 185{
 186        if (show_origin) {
 187                struct strbuf buf = STRBUF_INIT;
 188                show_config_origin(&buf);
 189                /* Use fwrite as "buf" can contain \0's if "end_null" is set. */
 190                fwrite(buf.buf, 1, buf.len, stdout);
 191                strbuf_release(&buf);
 192        }
 193        if (!omit_values && value_)
 194                printf("%s%c%s%c", key_, delim, value_, term);
 195        else
 196                printf("%s%c", key_, term);
 197        return 0;
 198}
 199
 200struct strbuf_list {
 201        struct strbuf *items;
 202        int nr;
 203        int alloc;
 204};
 205
 206static int format_config(struct strbuf *buf, const char *key_, const char *value_)
 207{
 208        if (show_origin)
 209                show_config_origin(buf);
 210        if (show_keys)
 211                strbuf_addstr(buf, key_);
 212        if (!omit_values) {
 213                if (show_keys)
 214                        strbuf_addch(buf, key_delim);
 215
 216                if (type == TYPE_INT)
 217                        strbuf_addf(buf, "%"PRId64,
 218                                    git_config_int64(key_, value_ ? value_ : ""));
 219                else if (type == TYPE_BOOL)
 220                        strbuf_addstr(buf, git_config_bool(key_, value_) ?
 221                                      "true" : "false");
 222                else if (type == TYPE_BOOL_OR_INT) {
 223                        int is_bool, v;
 224                        v = git_config_bool_or_int(key_, value_, &is_bool);
 225                        if (is_bool)
 226                                strbuf_addstr(buf, v ? "true" : "false");
 227                        else
 228                                strbuf_addf(buf, "%d", v);
 229                } else if (type == TYPE_PATH) {
 230                        const char *v;
 231                        if (git_config_pathname(&v, key_, value_) < 0)
 232                                return -1;
 233                        strbuf_addstr(buf, v);
 234                        free((char *)v);
 235                } else if (type == TYPE_EXPIRY_DATE) {
 236                        timestamp_t t;
 237                        if (git_config_expiry_date(&t, key_, value_) < 0)
 238                                return -1;
 239                        strbuf_addf(buf, "%"PRItime, t);
 240                } else if (type == TYPE_COLOR) {
 241                        char v[COLOR_MAXLEN];
 242                        if (git_config_color(v, key_, value_) < 0)
 243                                return -1;
 244                        strbuf_addstr(buf, v);
 245                } else if (value_) {
 246                        strbuf_addstr(buf, value_);
 247                } else {
 248                        /* Just show the key name; back out delimiter */
 249                        if (show_keys)
 250                                strbuf_setlen(buf, buf->len - 1);
 251                }
 252        }
 253        strbuf_addch(buf, term);
 254        return 0;
 255}
 256
 257static int collect_config(const char *key_, const char *value_, void *cb)
 258{
 259        struct strbuf_list *values = cb;
 260
 261        if (!use_key_regexp && strcmp(key_, key))
 262                return 0;
 263        if (use_key_regexp && regexec(key_regexp, key_, 0, NULL, 0))
 264                return 0;
 265        if (regexp != NULL &&
 266            (do_not_match ^ !!regexec(regexp, (value_?value_:""), 0, NULL, 0)))
 267                return 0;
 268
 269        ALLOC_GROW(values->items, values->nr + 1, values->alloc);
 270        strbuf_init(&values->items[values->nr], 0);
 271
 272        return format_config(&values->items[values->nr++], key_, value_);
 273}
 274
 275static int get_value(const char *key_, const char *regex_)
 276{
 277        int ret = CONFIG_GENERIC_ERROR;
 278        struct strbuf_list values = {NULL};
 279        int i;
 280
 281        if (use_key_regexp) {
 282                char *tl;
 283
 284                /*
 285                 * NEEDSWORK: this naive pattern lowercasing obviously does not
 286                 * work for more complex patterns like "^[^.]*Foo.*bar".
 287                 * Perhaps we should deprecate this altogether someday.
 288                 */
 289
 290                key = xstrdup(key_);
 291                for (tl = key + strlen(key) - 1;
 292                     tl >= key && *tl != '.';
 293                     tl--)
 294                        *tl = tolower(*tl);
 295                for (tl = key; *tl && *tl != '.'; tl++)
 296                        *tl = tolower(*tl);
 297
 298                key_regexp = (regex_t*)xmalloc(sizeof(regex_t));
 299                if (regcomp(key_regexp, key, REG_EXTENDED)) {
 300                        error("invalid key pattern: %s", key_);
 301                        FREE_AND_NULL(key_regexp);
 302                        ret = CONFIG_INVALID_PATTERN;
 303                        goto free_strings;
 304                }
 305        } else {
 306                if (git_config_parse_key(key_, &key, NULL)) {
 307                        ret = CONFIG_INVALID_KEY;
 308                        goto free_strings;
 309                }
 310        }
 311
 312        if (regex_) {
 313                if (regex_[0] == '!') {
 314                        do_not_match = 1;
 315                        regex_++;
 316                }
 317
 318                regexp = (regex_t*)xmalloc(sizeof(regex_t));
 319                if (regcomp(regexp, regex_, REG_EXTENDED)) {
 320                        error("invalid pattern: %s", regex_);
 321                        FREE_AND_NULL(regexp);
 322                        ret = CONFIG_INVALID_PATTERN;
 323                        goto free_strings;
 324                }
 325        }
 326
 327        config_with_options(collect_config, &values,
 328                            &given_config_source, &config_options);
 329
 330        if (!values.nr && default_value) {
 331                struct strbuf *item;
 332                ALLOC_GROW(values.items, values.nr + 1, values.alloc);
 333                item = &values.items[values.nr++];
 334                strbuf_init(item, 0);
 335                if (format_config(item, key_, default_value) < 0)
 336                        die(_("failed to format default config value: %s"),
 337                                default_value);
 338        }
 339
 340        ret = !values.nr;
 341
 342        for (i = 0; i < values.nr; i++) {
 343                struct strbuf *buf = values.items + i;
 344                if (do_all || i == values.nr - 1)
 345                        fwrite(buf->buf, 1, buf->len, stdout);
 346                strbuf_release(buf);
 347        }
 348        free(values.items);
 349
 350free_strings:
 351        free(key);
 352        if (key_regexp) {
 353                regfree(key_regexp);
 354                free(key_regexp);
 355        }
 356        if (regexp) {
 357                regfree(regexp);
 358                free(regexp);
 359        }
 360
 361        return ret;
 362}
 363
 364static char *normalize_value(const char *key, const char *value)
 365{
 366        if (!value)
 367                return NULL;
 368
 369        if (type == 0 || type == TYPE_PATH || type == TYPE_EXPIRY_DATE)
 370                /*
 371                 * We don't do normalization for TYPE_PATH here: If
 372                 * the path is like ~/foobar/, we prefer to store
 373                 * "~/foobar/" in the config file, and to expand the ~
 374                 * when retrieving the value.
 375                 * Also don't do normalization for expiry dates.
 376                 */
 377                return xstrdup(value);
 378        if (type == TYPE_INT)
 379                return xstrfmt("%"PRId64, git_config_int64(key, value));
 380        if (type == TYPE_BOOL)
 381                return xstrdup(git_config_bool(key, value) ?  "true" : "false");
 382        if (type == TYPE_BOOL_OR_INT) {
 383                int is_bool, v;
 384                v = git_config_bool_or_int(key, value, &is_bool);
 385                if (!is_bool)
 386                        return xstrfmt("%d", v);
 387                else
 388                        return xstrdup(v ? "true" : "false");
 389        }
 390        if (type == TYPE_COLOR) {
 391                char v[COLOR_MAXLEN];
 392                if (git_config_color(v, key, value))
 393                        die("cannot parse color '%s'", value);
 394
 395                /*
 396                 * The contents of `v` now contain an ANSI escape
 397                 * sequence, not suitable for including within a
 398                 * configuration file. Treat the above as a
 399                 * "sanity-check", and return the given value, which we
 400                 * know is representable as valid color code.
 401                 */
 402                return xstrdup(value);
 403        }
 404
 405        BUG("cannot normalize type %d", type);
 406}
 407
 408static int get_color_found;
 409static const char *get_color_slot;
 410static const char *get_colorbool_slot;
 411static char parsed_color[COLOR_MAXLEN];
 412
 413static int git_get_color_config(const char *var, const char *value, void *cb)
 414{
 415        if (!strcmp(var, get_color_slot)) {
 416                if (!value)
 417                        config_error_nonbool(var);
 418                if (color_parse(value, parsed_color) < 0)
 419                        return -1;
 420                get_color_found = 1;
 421        }
 422        return 0;
 423}
 424
 425static void get_color(const char *var, const char *def_color)
 426{
 427        get_color_slot = var;
 428        get_color_found = 0;
 429        parsed_color[0] = '\0';
 430        config_with_options(git_get_color_config, NULL,
 431                            &given_config_source, &config_options);
 432
 433        if (!get_color_found && def_color) {
 434                if (color_parse(def_color, parsed_color) < 0)
 435                        die(_("unable to parse default color value"));
 436        }
 437
 438        fputs(parsed_color, stdout);
 439}
 440
 441static int get_colorbool_found;
 442static int get_diff_color_found;
 443static int get_color_ui_found;
 444static int git_get_colorbool_config(const char *var, const char *value,
 445                void *cb)
 446{
 447        if (!strcmp(var, get_colorbool_slot))
 448                get_colorbool_found = git_config_colorbool(var, value);
 449        else if (!strcmp(var, "diff.color"))
 450                get_diff_color_found = git_config_colorbool(var, value);
 451        else if (!strcmp(var, "color.ui"))
 452                get_color_ui_found = git_config_colorbool(var, value);
 453        return 0;
 454}
 455
 456static int get_colorbool(const char *var, int print)
 457{
 458        get_colorbool_slot = var;
 459        get_colorbool_found = -1;
 460        get_diff_color_found = -1;
 461        get_color_ui_found = -1;
 462        config_with_options(git_get_colorbool_config, NULL,
 463                            &given_config_source, &config_options);
 464
 465        if (get_colorbool_found < 0) {
 466                if (!strcmp(get_colorbool_slot, "color.diff"))
 467                        get_colorbool_found = get_diff_color_found;
 468                if (get_colorbool_found < 0)
 469                        get_colorbool_found = get_color_ui_found;
 470        }
 471
 472        if (get_colorbool_found < 0)
 473                /* default value if none found in config */
 474                get_colorbool_found = GIT_COLOR_AUTO;
 475
 476        get_colorbool_found = want_color(get_colorbool_found);
 477
 478        if (print) {
 479                printf("%s\n", get_colorbool_found ? "true" : "false");
 480                return 0;
 481        } else
 482                return get_colorbool_found ? 0 : 1;
 483}
 484
 485static void check_write(void)
 486{
 487        if (!given_config_source.file && !startup_info->have_repository)
 488                die("not in a git directory");
 489
 490        if (given_config_source.use_stdin)
 491                die("writing to stdin is not supported");
 492
 493        if (given_config_source.blob)
 494                die("writing config blobs is not supported");
 495}
 496
 497struct urlmatch_current_candidate_value {
 498        char value_is_null;
 499        struct strbuf value;
 500};
 501
 502static int urlmatch_collect_fn(const char *var, const char *value, void *cb)
 503{
 504        struct string_list *values = cb;
 505        struct string_list_item *item = string_list_insert(values, var);
 506        struct urlmatch_current_candidate_value *matched = item->util;
 507
 508        if (!matched) {
 509                matched = xmalloc(sizeof(*matched));
 510                strbuf_init(&matched->value, 0);
 511                item->util = matched;
 512        } else {
 513                strbuf_reset(&matched->value);
 514        }
 515
 516        if (value) {
 517                strbuf_addstr(&matched->value, value);
 518                matched->value_is_null = 0;
 519        } else {
 520                matched->value_is_null = 1;
 521        }
 522        return 0;
 523}
 524
 525static int get_urlmatch(const char *var, const char *url)
 526{
 527        int ret;
 528        char *section_tail;
 529        struct string_list_item *item;
 530        struct urlmatch_config config = { STRING_LIST_INIT_DUP };
 531        struct string_list values = STRING_LIST_INIT_DUP;
 532
 533        config.collect_fn = urlmatch_collect_fn;
 534        config.cascade_fn = NULL;
 535        config.cb = &values;
 536
 537        if (!url_normalize(url, &config.url))
 538                die("%s", config.url.err);
 539
 540        config.section = xstrdup_tolower(var);
 541        section_tail = strchr(config.section, '.');
 542        if (section_tail) {
 543                *section_tail = '\0';
 544                config.key = section_tail + 1;
 545                show_keys = 0;
 546        } else {
 547                config.key = NULL;
 548                show_keys = 1;
 549        }
 550
 551        config_with_options(urlmatch_config_entry, &config,
 552                            &given_config_source, &config_options);
 553
 554        ret = !values.nr;
 555
 556        for_each_string_list_item(item, &values) {
 557                struct urlmatch_current_candidate_value *matched = item->util;
 558                struct strbuf buf = STRBUF_INIT;
 559
 560                format_config(&buf, item->string,
 561                              matched->value_is_null ? NULL : matched->value.buf);
 562                fwrite(buf.buf, 1, buf.len, stdout);
 563                strbuf_release(&buf);
 564
 565                strbuf_release(&matched->value);
 566        }
 567        string_list_clear(&config.vars, 1);
 568        string_list_clear(&values, 1);
 569        free(config.url.url);
 570
 571        free((void *)config.section);
 572        return ret;
 573}
 574
 575static char *default_user_config(void)
 576{
 577        struct strbuf buf = STRBUF_INIT;
 578        strbuf_addf(&buf,
 579                    _("# This is Git's per-user configuration file.\n"
 580                      "[user]\n"
 581                      "# Please adapt and uncomment the following lines:\n"
 582                      "#        name = %s\n"
 583                      "#        email = %s\n"),
 584                    ident_default_name(),
 585                    ident_default_email());
 586        return strbuf_detach(&buf, NULL);
 587}
 588
 589int cmd_config(int argc, const char **argv, const char *prefix)
 590{
 591        int nongit = !startup_info->have_repository;
 592        char *value;
 593
 594        given_config_source.file = getenv(CONFIG_ENVIRONMENT);
 595
 596        argc = parse_options(argc, argv, prefix, builtin_config_options,
 597                             builtin_config_usage,
 598                             PARSE_OPT_STOP_AT_NON_OPTION);
 599
 600        if (use_global_config + use_system_config + use_local_config +
 601            !!given_config_source.file + !!given_config_source.blob > 1) {
 602                error("only one config file at a time.");
 603                usage_builtin_config();
 604        }
 605
 606        if (use_local_config && nongit)
 607                die(_("--local can only be used inside a git repository"));
 608
 609        if (given_config_source.blob && nongit)
 610                die(_("--blob can only be used inside a git repository"));
 611
 612        if (given_config_source.file &&
 613                        !strcmp(given_config_source.file, "-")) {
 614                given_config_source.file = NULL;
 615                given_config_source.use_stdin = 1;
 616        }
 617
 618        if (use_global_config) {
 619                char *user_config = expand_user_path("~/.gitconfig", 0);
 620                char *xdg_config = xdg_config_home("config");
 621
 622                if (!user_config)
 623                        /*
 624                         * It is unknown if HOME/.gitconfig exists, so
 625                         * we do not know if we should write to XDG
 626                         * location; error out even if XDG_CONFIG_HOME
 627                         * is set and points at a sane location.
 628                         */
 629                        die("$HOME not set");
 630
 631                if (access_or_warn(user_config, R_OK, 0) &&
 632                    xdg_config && !access_or_warn(xdg_config, R_OK, 0)) {
 633                        given_config_source.file = xdg_config;
 634                        free(user_config);
 635                } else {
 636                        given_config_source.file = user_config;
 637                        free(xdg_config);
 638                }
 639        }
 640        else if (use_system_config)
 641                given_config_source.file = git_etc_gitconfig();
 642        else if (use_local_config)
 643                given_config_source.file = git_pathdup("config");
 644        else if (given_config_source.file) {
 645                if (!is_absolute_path(given_config_source.file) && prefix)
 646                        given_config_source.file =
 647                                prefix_filename(prefix, given_config_source.file);
 648        }
 649
 650        if (respect_includes_opt == -1)
 651                config_options.respect_includes = !given_config_source.file;
 652        else
 653                config_options.respect_includes = respect_includes_opt;
 654        if (!nongit) {
 655                config_options.commondir = get_git_common_dir();
 656                config_options.git_dir = get_git_dir();
 657        }
 658
 659        if (end_null) {
 660                term = '\0';
 661                delim = '\n';
 662                key_delim = '\n';
 663        }
 664
 665        if ((actions & (ACTION_GET_COLOR|ACTION_GET_COLORBOOL)) && type) {
 666                error("--get-color and variable type are incoherent");
 667                usage_builtin_config();
 668        }
 669
 670        if (HAS_MULTI_BITS(actions)) {
 671                error("only one action at a time.");
 672                usage_builtin_config();
 673        }
 674        if (actions == 0)
 675                switch (argc) {
 676                case 1: actions = ACTION_GET; break;
 677                case 2: actions = ACTION_SET; break;
 678                case 3: actions = ACTION_SET_ALL; break;
 679                default:
 680                        usage_builtin_config();
 681                }
 682        if (omit_values &&
 683            !(actions == ACTION_LIST || actions == ACTION_GET_REGEXP)) {
 684                error("--name-only is only applicable to --list or --get-regexp");
 685                usage_builtin_config();
 686        }
 687
 688        if (show_origin && !(actions &
 689                (ACTION_GET|ACTION_GET_ALL|ACTION_GET_REGEXP|ACTION_LIST))) {
 690                error("--show-origin is only applicable to --get, --get-all, "
 691                          "--get-regexp, and --list.");
 692                usage_builtin_config();
 693        }
 694
 695        if (default_value && !(actions & ACTION_GET)) {
 696                error("--default is only applicable to --get");
 697                usage_builtin_config();
 698        }
 699
 700        if (actions & PAGING_ACTIONS)
 701                setup_auto_pager("config", 1);
 702
 703        if (actions == ACTION_LIST) {
 704                check_argc(argc, 0, 0);
 705                if (config_with_options(show_all_config, NULL,
 706                                        &given_config_source,
 707                                        &config_options) < 0) {
 708                        if (given_config_source.file)
 709                                die_errno("unable to read config file '%s'",
 710                                          given_config_source.file);
 711                        else
 712                                die("error processing config file(s)");
 713                }
 714        }
 715        else if (actions == ACTION_EDIT) {
 716                char *config_file;
 717
 718                check_argc(argc, 0, 0);
 719                if (!given_config_source.file && nongit)
 720                        die("not in a git directory");
 721                if (given_config_source.use_stdin)
 722                        die("editing stdin is not supported");
 723                if (given_config_source.blob)
 724                        die("editing blobs is not supported");
 725                git_config(git_default_config, NULL);
 726                config_file = given_config_source.file ?
 727                                xstrdup(given_config_source.file) :
 728                                git_pathdup("config");
 729                if (use_global_config) {
 730                        int fd = open(config_file, O_CREAT | O_EXCL | O_WRONLY, 0666);
 731                        if (fd >= 0) {
 732                                char *content = default_user_config();
 733                                write_str_in_full(fd, content);
 734                                free(content);
 735                                close(fd);
 736                        }
 737                        else if (errno != EEXIST)
 738                                die_errno(_("cannot create configuration file %s"), config_file);
 739                }
 740                launch_editor(config_file, NULL, NULL);
 741                free(config_file);
 742        }
 743        else if (actions == ACTION_SET) {
 744                int ret;
 745                check_write();
 746                check_argc(argc, 2, 2);
 747                value = normalize_value(argv[0], argv[1]);
 748                UNLEAK(value);
 749                ret = git_config_set_in_file_gently(given_config_source.file, argv[0], value);
 750                if (ret == CONFIG_NOTHING_SET)
 751                        error(_("cannot overwrite multiple values with a single value\n"
 752                        "       Use a regexp, --add or --replace-all to change %s."), argv[0]);
 753                return ret;
 754        }
 755        else if (actions == ACTION_SET_ALL) {
 756                check_write();
 757                check_argc(argc, 2, 3);
 758                value = normalize_value(argv[0], argv[1]);
 759                UNLEAK(value);
 760                return git_config_set_multivar_in_file_gently(given_config_source.file,
 761                                                              argv[0], value, argv[2], 0);
 762        }
 763        else if (actions == ACTION_ADD) {
 764                check_write();
 765                check_argc(argc, 2, 2);
 766                value = normalize_value(argv[0], argv[1]);
 767                UNLEAK(value);
 768                return git_config_set_multivar_in_file_gently(given_config_source.file,
 769                                                              argv[0], value,
 770                                                              CONFIG_REGEX_NONE, 0);
 771        }
 772        else if (actions == ACTION_REPLACE_ALL) {
 773                check_write();
 774                check_argc(argc, 2, 3);
 775                value = normalize_value(argv[0], argv[1]);
 776                UNLEAK(value);
 777                return git_config_set_multivar_in_file_gently(given_config_source.file,
 778                                                              argv[0], value, argv[2], 1);
 779        }
 780        else if (actions == ACTION_GET) {
 781                check_argc(argc, 1, 2);
 782                return get_value(argv[0], argv[1]);
 783        }
 784        else if (actions == ACTION_GET_ALL) {
 785                do_all = 1;
 786                check_argc(argc, 1, 2);
 787                return get_value(argv[0], argv[1]);
 788        }
 789        else if (actions == ACTION_GET_REGEXP) {
 790                show_keys = 1;
 791                use_key_regexp = 1;
 792                do_all = 1;
 793                check_argc(argc, 1, 2);
 794                return get_value(argv[0], argv[1]);
 795        }
 796        else if (actions == ACTION_GET_URLMATCH) {
 797                check_argc(argc, 2, 2);
 798                return get_urlmatch(argv[0], argv[1]);
 799        }
 800        else if (actions == ACTION_UNSET) {
 801                check_write();
 802                check_argc(argc, 1, 2);
 803                if (argc == 2)
 804                        return git_config_set_multivar_in_file_gently(given_config_source.file,
 805                                                                      argv[0], NULL, argv[1], 0);
 806                else
 807                        return git_config_set_in_file_gently(given_config_source.file,
 808                                                             argv[0], NULL);
 809        }
 810        else if (actions == ACTION_UNSET_ALL) {
 811                check_write();
 812                check_argc(argc, 1, 2);
 813                return git_config_set_multivar_in_file_gently(given_config_source.file,
 814                                                              argv[0], NULL, argv[1], 1);
 815        }
 816        else if (actions == ACTION_RENAME_SECTION) {
 817                int ret;
 818                check_write();
 819                check_argc(argc, 2, 2);
 820                ret = git_config_rename_section_in_file(given_config_source.file,
 821                                                        argv[0], argv[1]);
 822                if (ret < 0)
 823                        return ret;
 824                if (ret == 0)
 825                        die("No such section!");
 826        }
 827        else if (actions == ACTION_REMOVE_SECTION) {
 828                int ret;
 829                check_write();
 830                check_argc(argc, 1, 1);
 831                ret = git_config_rename_section_in_file(given_config_source.file,
 832                                                        argv[0], NULL);
 833                if (ret < 0)
 834                        return ret;
 835                if (ret == 0)
 836                        die("No such section!");
 837        }
 838        else if (actions == ACTION_GET_COLOR) {
 839                check_argc(argc, 1, 2);
 840                get_color(argv[0], argv[1]);
 841        }
 842        else if (actions == ACTION_GET_COLORBOOL) {
 843                check_argc(argc, 1, 2);
 844                if (argc == 2)
 845                        color_stdout_is_tty = git_config_bool("command line", argv[1]);
 846                return get_colorbool(argv[0], argc == 2);
 847        }
 848
 849        return 0;
 850}