#include "builtin.h"

#include "abspath.h"

#include "config.h"

#include "color.h"

#include "editor.h"

#include "environment.h"

#include "repository.h"

#include "gettext.h"

#include "ident.h"

#include "parse-options.h"

#include "urlmatch.h"

#include "path.h"

#include "quote.h"

#include "setup.h"

#include "strbuf.h"

#include "worktree.h"

static const char *const builtin_config_usage[] = {

  N_("git config [<options>]"),

  NULL

};

static char *key;

static regex_t *key_regexp;

static const char *value_pattern;

static regex_t *regexp;

static int show_keys;

static int omit_values;

static int use_key_regexp;

static int do_all;

static int do_not_match;

static char delim = '=';

static char key_delim = ' ';

static char term = '\n';

static int use_global_config, use_system_config, use_local_config;

static int use_worktree_config;

static struct git_config_source given_config_source;

static int actions, type;

static char *default_value;

static int end_nul;

static int respect_includes_opt = -1;

static struct config_options config_options;

static int show_origin;

static int show_scope;

static int fixed_value;

#define ACTION_GET (1<<0)

#define ACTION_GET_ALL (1<<1)

#define ACTION_GET_REGEXP (1<<2)

#define ACTION_REPLACE_ALL (1<<3)

#define ACTION_ADD (1<<4)

#define ACTION_UNSET (1<<5)

#define ACTION_UNSET_ALL (1<<6)

#define ACTION_RENAME_SECTION (1<<7)

#define ACTION_REMOVE_SECTION (1<<8)

#define ACTION_LIST (1<<9)

#define ACTION_EDIT (1<<10)

#define ACTION_SET (1<<11)

#define ACTION_SET_ALL (1<<12)

#define ACTION_GET_COLOR (1<<13)

#define ACTION_GET_COLORBOOL (1<<14)

#define ACTION_GET_URLMATCH (1<<15)

/*

 * The actions "ACTION_LIST | ACTION_GET_*" which may produce more than

 * one line of output and which should therefore be paged.

 */

#define PAGING_ACTIONS (ACTION_LIST | ACTION_GET_ALL | \

      ACTION_GET_REGEXP | ACTION_GET_URLMATCH)

#define TYPE_BOOL   1

#define TYPE_INT    2

#define TYPE_BOOL_OR_INT  3

#define TYPE_PATH   4

#define TYPE_EXPIRY_DATE  5

#define TYPE_COLOR    6

#define TYPE_BOOL_OR_STR  7

#define OPT_CALLBACK_VALUE(s, l, v, h, i) \

  { OPTION_CALLBACK, (s), (l), (v), NULL, (h), PARSE_OPT_NOARG | \

  PARSE_OPT_NONEG, option_parse_type, (i) }

static NORETURN void usage_builtin_config(void);

static int option_parse_type(const struct option *opt, const char *arg,

           int unset)

{

  int new_type, *to_type;

  if (unset) {

    *((int *) opt->value) = 0;

    return 0;

  }

  /*

   * To support '--<type>' style flags, begin with new_type equal to

   * opt->defval.

   */

  new_type = opt->defval;

  if (!new_type) {

    if (!strcmp(arg, "bool"))

      new_type = TYPE_BOOL;

    else if (!strcmp(arg, "int"))

      new_type = TYPE_INT;

    else if (!strcmp(arg, "bool-or-int"))

      new_type = TYPE_BOOL_OR_INT;

    else if (!strcmp(arg, "bool-or-str"))

      new_type = TYPE_BOOL_OR_STR;

    else if (!strcmp(arg, "path"))

      new_type = TYPE_PATH;

    else if (!strcmp(arg, "expiry-date"))

      new_type = TYPE_EXPIRY_DATE;

    else if (!strcmp(arg, "color"))

      new_type = TYPE_COLOR;

    else

      die(_("unrecognized --type argument, %s"), arg);

  }

  to_type = opt->value;

  if (*to_type && *to_type != new_type) {

    /*

     * Complain when there is a new type not equal to the old type.

     * This allows for combinations like '--int --type=int' and

     * '--type=int --type=int', but disallows ones like '--type=bool

     * --int' and '--type=bool

     * --type=int'.

     */

    error(_("only one type at a time"));

    usage_builtin_config();

  }

  *to_type = new_type;

  return 0;

}

static struct option builtin_config_options[] = {

  OPT_GROUP(N_("Config file location")),

  OPT_BOOL(0, "global", &use_global_config, N_("use global config file")),

  OPT_BOOL(0, "system", &use_system_config, N_("use system config file")),

  OPT_BOOL(0, "local", &use_local_config, N_("use repository config file")),

  OPT_BOOL(0, "worktree", &use_worktree_config, N_("use per-worktree config file")),

  OPT_STRING('f', "file", &given_config_source.file, N_("file"), N_("use given config file")),

  OPT_STRING(0, "blob", &given_config_source.blob, N_("blob-id"), N_("read config from given blob object")),

  OPT_GROUP(N_("Action")),

  OPT_BIT(0, "get", &actions, N_("get value: name [value-pattern]"), ACTION_GET),

  OPT_BIT(0, "get-all", &actions, N_("get all values: key [value-pattern]"), ACTION_GET_ALL),

  OPT_BIT(0, "get-regexp", &actions, N_("get values for regexp: name-regex [value-pattern]"), ACTION_GET_REGEXP),

  OPT_BIT(0, "get-urlmatch", &actions, N_("get value specific for the URL: section[.var] URL"), ACTION_GET_URLMATCH),

  OPT_BIT(0, "replace-all", &actions, N_("replace all matching variables: name value [value-pattern]"), ACTION_REPLACE_ALL),

  OPT_BIT(0, "add", &actions, N_("add a new variable: name value"), ACTION_ADD),

  OPT_BIT(0, "unset", &actions, N_("remove a variable: name [value-pattern]"), ACTION_UNSET),

  OPT_BIT(0, "unset-all", &actions, N_("remove all matches: name [value-pattern]"), ACTION_UNSET_ALL),

  OPT_BIT(0, "rename-section", &actions, N_("rename section: old-name new-name"), ACTION_RENAME_SECTION),

  OPT_BIT(0, "remove-section", &actions, N_("remove a section: name"), ACTION_REMOVE_SECTION),

  OPT_BIT('l', "list", &actions, N_("list all"), ACTION_LIST),

  OPT_BOOL(0, "fixed-value", &fixed_value, N_("use string equality when comparing values to 'value-pattern'")),

  OPT_BIT('e', "edit", &actions, N_("open an editor"), ACTION_EDIT),

  OPT_BIT(0, "get-color", &actions, N_("find the color configured: slot [default]"), ACTION_GET_COLOR),

  OPT_BIT(0, "get-colorbool", &actions, N_("find the color setting: slot [stdout-is-tty]"), ACTION_GET_COLORBOOL),

  OPT_GROUP(N_("Type")),

  OPT_CALLBACK('t', "type", &type, N_("type"), N_("value is given this type"), option_parse_type),

  OPT_CALLBACK_VALUE(0, "bool", &type, N_("value is \"true\" or \"false\""), TYPE_BOOL),

  OPT_CALLBACK_VALUE(0, "int", &type, N_("value is decimal number"), TYPE_INT),

  OPT_CALLBACK_VALUE(0, "bool-or-int", &type, N_("value is --bool or --int"), TYPE_BOOL_OR_INT),

  OPT_CALLBACK_VALUE(0, "bool-or-str", &type, N_("value is --bool or string"), TYPE_BOOL_OR_STR),

  OPT_CALLBACK_VALUE(0, "path", &type, N_("value is a path (file or directory name)"), TYPE_PATH),

  OPT_CALLBACK_VALUE(0, "expiry-date", &type, N_("value is an expiry date"), TYPE_EXPIRY_DATE),

  OPT_GROUP(N_("Other")),

  OPT_BOOL('z', "null", &end_nul, N_("terminate values with NUL byte")),

  OPT_BOOL(0, "name-only", &omit_values, N_("show variable names only")),

  OPT_BOOL(0, "includes", &respect_includes_opt, N_("respect include directives on lookup")),

  OPT_BOOL(0, "show-origin", &show_origin, N_("show origin of config (file, standard input, blob, command line)")),

  OPT_BOOL(0, "show-scope", &show_scope, N_("show scope of config (worktree, local, global, system, command)")),

  OPT_STRING(0, "default", &default_value, N_("value"), N_("with --get, use default value when missing entry")),

  OPT_END(),

};

static NORETURN void usage_builtin_config(void)

{

  usage_with_options(builtin_config_usage, builtin_config_options);

}

static void check_argc(int argc, int min, int max)

{

  if (argc >= min && argc <= max)

    return;

  if (min == max)

    error(_("wrong number of arguments, should be %d"), min);

  else

    error(_("wrong number of arguments, should be from %d to %d"),

          min, max);

  usage_builtin_config();

}

static void show_config_origin(const struct key_value_info *kvi,

             struct strbuf *buf)

{

  const char term = end_nul ? '\0' : '\t';

  strbuf_addstr(buf, config_origin_type_name(kvi->origin_type));

  strbuf_addch(buf, ':');

  if (end_nul)

    strbuf_addstr(buf, kvi->filename ? kvi->filename : "");

  else

    quote_c_style(kvi->filename ? kvi->filename : "", buf, NULL, 0);

  strbuf_addch(buf, term);

}

static void show_config_scope(const struct key_value_info *kvi,

            struct strbuf *buf)

{

  const char term = end_nul ? '\0' : '\t';

  const char *scope = config_scope_name(kvi->scope);

  strbuf_addstr(buf, N_(scope));

  strbuf_addch(buf, term);

}

static int show_all_config(const char *key_, const char *value_,

         const struct config_context *ctx,

         void *cb UNUSED)

{

  const struct key_value_info *kvi = ctx->kvi;

  if (show_origin || show_scope) {

    struct strbuf buf = STRBUF_INIT;

    if (show_scope)

      show_config_scope(kvi, &buf);

    if (show_origin)

      show_config_origin(kvi, &buf);

    /* Use fwrite as "buf" can contain \0's if "end_null" is set. */

    fwrite(buf.buf, 1, buf.len, stdout);

    strbuf_release(&buf);

  }

  if (!omit_values && value_)

    printf("%s%c%s%c", key_, delim, value_, term);

  else

    printf("%s%c", key_, term);

  return 0;

}

struct strbuf_list {

  struct strbuf *items;

  int nr;

  int alloc;

};

static int format_config(struct strbuf *buf, const char *key_,

       const char *value_, const struct key_value_info *kvi)

{

  if (show_scope)

    show_config_scope(kvi, buf);

  if (show_origin)

    show_config_origin(kvi, buf);

  if (show_keys)

    strbuf_addstr(buf, key_);

  if (!omit_values) {

    if (show_keys)

      strbuf_addch(buf, key_delim);

    if (type == TYPE_INT)

      strbuf_addf(buf, "%"PRId64,

            git_config_int64(key_, value_ ? value_ : "", kvi));

    else if (type == TYPE_BOOL)

      strbuf_addstr(buf, git_config_bool(key_, value_) ?

              "true" : "false");

    else if (type == TYPE_BOOL_OR_INT) {

      int is_bool, v;

      v = git_config_bool_or_int(key_, value_, kvi,

               &is_bool);

      if (is_bool)

        strbuf_addstr(buf, v ? "true" : "false");

      else

        strbuf_addf(buf, "%d", v);

    } else if (type == TYPE_BOOL_OR_STR) {

      int v = git_parse_maybe_bool(value_);

      if (v < 0)

        strbuf_addstr(buf, value_);

      else

        strbuf_addstr(buf, v ? "true" : "false");

    } else if (type == TYPE_PATH) {

      const char *v;

      if (git_config_pathname(&v, key_, value_) < 0)

        return -1;

      strbuf_addstr(buf, v);

      free((char *)v);

    } else if (type == TYPE_EXPIRY_DATE) {

      timestamp_t t;

      if (git_config_expiry_date(&t, key_, value_) < 0)

        return -1;

      strbuf_addf(buf, "%"PRItime, t);

    } else if (type == TYPE_COLOR) {

      char v[COLOR_MAXLEN];

      if (git_config_color(v, key_, value_) < 0)

        return -1;

      strbuf_addstr(buf, v);

    } else if (value_) {

      strbuf_addstr(buf, value_);

    } else {

      /* Just show the key name; back out delimiter */

      if (show_keys)

        strbuf_setlen(buf, buf->len - 1);

    }

  }

  strbuf_addch(buf, term);

  return 0;

}

static int collect_config(const char *key_, const char *value_,

        const struct config_context *ctx, void *cb)

{

  struct strbuf_list *values = cb;

  const struct key_value_info *kvi = ctx->kvi;

  if (!use_key_regexp && strcmp(key_, key))

    return 0;

  if (use_key_regexp && regexec(key_regexp, key_, 0, NULL, 0))

    return 0;

  if (fixed_value && strcmp(value_pattern, (value_?value_:"")))

    return 0;

  if (regexp != NULL &&

      (do_not_match ^ !!regexec(regexp, (value_?value_:""), 0, NULL, 0)))

    return 0;

  ALLOC_GROW(values->items, values->nr + 1, values->alloc);

  strbuf_init(&values->items[values->nr], 0);

  return format_config(&values->items[values->nr++], key_, value_, kvi);

}

static int get_value(const char *key_, const char *regex_, unsigned flags)

{

  int ret = CONFIG_GENERIC_ERROR;

  struct strbuf_list values = {NULL};

  int i;

  if (use_key_regexp) {

    char *tl;

    /*

     * NEEDSWORK: this naive pattern lowercasing obviously does not

     * work for more complex patterns like "^[^.]*Foo.*bar".

     * Perhaps we should deprecate this altogether someday.

     */

    key = xstrdup(key_);

    for (tl = key + strlen(key) - 1;

         tl >= key && *tl != '.';

         tl--)

      *tl = tolower(*tl);

    for (tl = key; *tl && *tl != '.'; tl++)

      *tl = tolower(*tl);

    key_regexp = (regex_t*)xmalloc(sizeof(regex_t));

    if (regcomp(key_regexp, key, REG_EXTENDED)) {

      error(_("invalid key pattern: %s"), key_);

      FREE_AND_NULL(key_regexp);

      ret = CONFIG_INVALID_PATTERN;

      goto free_strings;

    }

  } else {

    if (git_config_parse_key(key_, &key, NULL)) {

      ret = CONFIG_INVALID_KEY;

      goto free_strings;

    }

  }

  if (regex_ && (flags & CONFIG_FLAGS_FIXED_VALUE))

    value_pattern = regex_;

  else if (regex_) {

    if (regex_[0] == '!') {

      do_not_match = 1;

      regex_++;

    }

    regexp = (regex_t*)xmalloc(sizeof(regex_t));

    if (regcomp(regexp, regex_, REG_EXTENDED)) {

      error(_("invalid pattern: %s"), regex_);

      FREE_AND_NULL(regexp);

      ret = CONFIG_INVALID_PATTERN;

      goto free_strings;

    }

  }

  config_with_options(collect_config, &values,

          &given_config_source, the_repository,

          &config_options);

  if (!values.nr && default_value) {

    struct key_value_info kvi = KVI_INIT;

    struct strbuf *item;

    kvi_from_param(&kvi);

    ALLOC_GROW(values.items, values.nr + 1, values.alloc);

    item = &values.items[values.nr++];

    strbuf_init(item, 0);

    if (format_config(item, key_, default_value, &kvi) < 0)

      die(_("failed to format default config value: %s"),

        default_value);

  }

  ret = !values.nr;

  for (i = 0; i < values.nr; i++) {

    struct strbuf *buf = values.items + i;

    if (do_all || i == values.nr - 1)

      fwrite(buf->buf, 1, buf->len, stdout);

    strbuf_release(buf);

  }

  free(values.items);

free_strings:

  free(key);

  if (key_regexp) {

    regfree(key_regexp);

    free(key_regexp);

  }

  if (regexp) {

    regfree(regexp);

    free(regexp);

  }

  return ret;

}

static char *normalize_value(const char *key, const char *value,

           struct key_value_info *kvi)

{

  if (!value)

    return NULL;

  if (type == 0 || type == TYPE_PATH || type == TYPE_EXPIRY_DATE)

    /*

     * We don't do normalization for TYPE_PATH here: If

     * the path is like ~/foobar/, we prefer to store

     * "~/foobar/" in the config file, and to expand the ~

     * when retrieving the value.

     * Also don't do normalization for expiry dates.

     */

    return xstrdup(value);

  if (type == TYPE_INT)

    return xstrfmt("%"PRId64, git_config_int64(key, value, kvi));

  if (type == TYPE_BOOL)

    return xstrdup(git_config_bool(key, value) ?  "true" : "false");

  if (type == TYPE_BOOL_OR_INT) {

    int is_bool, v;

    v = git_config_bool_or_int(key, value, kvi, &is_bool);

    if (!is_bool)

      return xstrfmt("%d", v);

    else

      return xstrdup(v ? "true" : "false");

  }

  if (type == TYPE_BOOL_OR_STR) {

    int v = git_parse_maybe_bool(value);

    if (v < 0)

      return xstrdup(value);

    else

      return xstrdup(v ? "true" : "false");

  }

  if (type == TYPE_COLOR) {

    char v[COLOR_MAXLEN];

    if (git_config_color(v, key, value))

      die(_("cannot parse color '%s'"), value);

    /*

     * The contents of `v` now contain an ANSI escape

     * sequence, not suitable for including within a

     * configuration file. Treat the above as a

     * "sanity-check", and return the given value, which we

     * know is representable as valid color code.

     */

    return xstrdup(value);

  }

  BUG("cannot normalize type %d", type);

}

static int get_color_found;

static const char *get_color_slot;

static const char *get_colorbool_slot;

static char parsed_color[COLOR_MAXLEN];

static int git_get_color_config(const char *var, const char *value,

        const struct config_context *ctx UNUSED,

        void *cb UNUSED)

{

  if (!strcmp(var, get_color_slot)) {

    if (!value)

      config_error_nonbool(var);

    if (color_parse(value, parsed_color) < 0)

      return -1;

    get_color_found = 1;

  }

  return 0;

}

static void get_color(const char *var, const char *def_color)

{

  get_color_slot = var;

  get_color_found = 0;

  parsed_color[0] = '\0';

  config_with_options(git_get_color_config, NULL,

          &given_config_source, the_repository,

          &config_options);

  if (!get_color_found && def_color) {

    if (color_parse(def_color, parsed_color) < 0)

      die(_("unable to parse default color value"));

  }

  fputs(parsed_color, stdout);

}

static int get_colorbool_found;

static int get_diff_color_found;

static int get_color_ui_found;

static int git_get_colorbool_config(const char *var, const char *value,

            const struct config_context *ctx UNUSED,

            void *data UNUSED)

{

  if (!strcmp(var, get_colorbool_slot))

    get_colorbool_found = git_config_colorbool(var, value);

  else if (!strcmp(var, "diff.color"))

    get_diff_color_found = git_config_colorbool(var, value);

  else if (!strcmp(var, "color.ui"))

    get_color_ui_found = git_config_colorbool(var, value);

  return 0;

}

static int get_colorbool(const char *var, int print)

{

  get_colorbool_slot = var;

  get_colorbool_found = -1;

  get_diff_color_found = -1;

  get_color_ui_found = -1;

  config_with_options(git_get_colorbool_config, NULL,

          &given_config_source, the_repository,

          &config_options);

  if (get_colorbool_found < 0) {

    if (!strcmp(get_colorbool_slot, "color.diff"))

      get_colorbool_found = get_diff_color_found;

    if (get_colorbool_found < 0)

      get_colorbool_found = get_color_ui_found;

  }

  if (get_colorbool_found < 0)

    /* default value if none found in config */

    get_colorbool_found = GIT_COLOR_AUTO;

  get_colorbool_found = want_color(get_colorbool_found);

  if (print) {

    printf("%s\n", get_colorbool_found ? "true" : "false");

    return 0;

  } else

    return get_colorbool_found ? 0 : 1;

}

static void check_write(void)

{

  if (!given_config_source.file && !startup_info->have_repository)

    die(_("not in a git directory"));

  if (given_config_source.use_stdin)

    die(_("writing to stdin is not supported"));

  if (given_config_source.blob)

    die(_("writing config blobs is not supported"));

}

struct urlmatch_current_candidate_value {

  char value_is_null;

  struct strbuf value;

  struct key_value_info kvi;

};

static int urlmatch_collect_fn(const char *var, const char *value,

             const struct config_context *ctx,

             void *cb)

{

  struct string_list *values = cb;

  struct string_list_item *item = string_list_insert(values, var);

  struct urlmatch_current_candidate_value *matched = item->util;

  const struct key_value_info *kvi = ctx->kvi;

  if (!matched) {

    matched = xmalloc(sizeof(*matched));

    strbuf_init(&matched->value, 0);

    item->util = matched;

  } else {

    strbuf_reset(&matched->value);

  }

  matched->kvi = *kvi;

  if (value) {

    strbuf_addstr(&matched->value, value);

    matched->value_is_null = 0;

  } else {

    matched->value_is_null = 1;

  }

  return 0;

}

static int get_urlmatch(const char *var, const char *url)

{

  int ret;

  char *section_tail;

  struct string_list_item *item;

  struct urlmatch_config config = URLMATCH_CONFIG_INIT;

  struct string_list values = STRING_LIST_INIT_DUP;

  config.collect_fn = urlmatch_collect_fn;

  config.cascade_fn = NULL;

  config.cb = &values;

  if (!url_normalize(url, &config.url))

    die("%s", config.url.err);

  config.section = xstrdup_tolower(var);

  section_tail = strchr(config.section, '.');

  if (section_tail) {

    *section_tail = '\0';

    config.key = section_tail + 1;

    show_keys = 0;

  } else {

    config.key = NULL;

    show_keys = 1;

  }

  config_with_options(urlmatch_config_entry, &config,

          &given_config_source, the_repository,

          &config_options);

  ret = !values.nr;

  for_each_string_list_item(item, &values) {

    struct urlmatch_current_candidate_value *matched = item->util;

    struct strbuf buf = STRBUF_INIT;

    format_config(&buf, item->string,

            matched->value_is_null ? NULL : matched->value.buf,

            &matched->kvi);

    fwrite(buf.buf, 1, buf.len, stdout);

    strbuf_release(&buf);

    strbuf_release(&matched->value);

  }

  urlmatch_config_release(&config);

  string_list_clear(&values, 1);

  free(config.url.url);

  free((void *)config.section);

  return ret;

}

static char *default_user_config(void)

{

  struct strbuf buf = STRBUF_INIT;

  strbuf_addf(&buf,

        _("# This is Git's per-user configuration file.\n"

          "[user]\n"

          "# Please adapt and uncomment the following lines:\n"

          "#  name = %s\n"

          "#  email = %s\n"),

        ident_default_name(),

        ident_default_email());

  return strbuf_detach(&buf, NULL);

}

int cmd_config(int argc, const char **argv, const char *prefix)

{

  int nongit = !startup_info->have_repository;

  char *value = NULL;

  int flags = 0;

  int ret = 0;

  struct key_value_info default_kvi = KVI_INIT;

  given_config_source.file = xstrdup_or_null(getenv(CONFIG_ENVIRONMENT));

  argc = parse_options(argc, argv, prefix, builtin_config_options,

           builtin_config_usage,

           PARSE_OPT_STOP_AT_NON_OPTION);

  if (use_global_config + use_system_config + use_local_config +

      use_worktree_config +

      !!given_config_source.file + !!given_config_source.blob > 1) {

    error(_("only one config file at a time"));

    usage_builtin_config();

  }

  if (nongit) {

    if (use_local_config)

      die(_("--local can only be used inside a git repository"));

    if (given_config_source.blob)

      die(_("--blob can only be used inside a git repository"));

    if (use_worktree_config)

      die(_("--worktree can only be used inside a git repository"));

  }

  if (given_config_source.file &&

      !strcmp(given_config_source.file, "-")) {

    given_config_source.file = NULL;

    given_config_source.use_stdin = 1;

    given_config_source.scope = CONFIG_SCOPE_COMMAND;

  }

  if (use_global_config) {

    char *user_config, *xdg_config;

    git_global_config(&user_config, &xdg_config);

    if (!user_config)

      /*

       * It is unknown if HOME/.gitconfig exists, so

       * we do not know if we should write to XDG

       * location; error out even if XDG_CONFIG_HOME

       * is set and points at a sane location.

       */

      die(_("$HOME not set"));

    given_config_source.scope = CONFIG_SCOPE_GLOBAL;

    if (access_or_warn(user_config, R_OK, 0) &&

        xdg_config && !access_or_warn(xdg_config, R_OK, 0)) {

      given_config_source.file = xdg_config;

      free(user_config);

    } else {

      given_config_source.file = user_config;

      free(xdg_config);

    }

  }

  else if (use_system_config) {

    given_config_source.file = git_system_config();

    given_config_source.scope = CONFIG_SCOPE_SYSTEM;

  } else if (use_local_config) {

    given_config_source.file = git_pathdup("config");

    given_config_source.scope = CONFIG_SCOPE_LOCAL;

  } else if (use_worktree_config) {

    struct worktree **worktrees = get_worktrees();

    if (the_repository->repository_format_worktree_config)

      given_config_source.file = git_pathdup("config.worktree");

    else if (worktrees[0] && worktrees[1])

      die(_("--worktree cannot be used with multiple "

            "working trees unless the config\n"

            "extension worktreeConfig is enabled. "

            "Please read \"CONFIGURATION FILE\"\n"

            "section in \"git help worktree\" for details"));

    else

      given_config_source.file = git_pathdup("config");

    given_config_source.scope = CONFIG_SCOPE_LOCAL;

    free_worktrees(worktrees);

  } else if (given_config_source.file) {

    if (!is_absolute_path(given_config_source.file) && prefix)

      given_config_source.file =

        prefix_filename(prefix, given_config_source.file);

    given_config_source.scope = CONFIG_SCOPE_COMMAND;

  } else if (given_config_source.blob) {

    given_config_source.scope = CONFIG_SCOPE_COMMAND;

  }

  if (respect_includes_opt == -1)

    config_options.respect_includes = !given_config_source.file;

  else

    config_options.respect_includes = respect_includes_opt;

  if (!nongit) {

    config_options.commondir = get_git_common_dir();

    config_options.git_dir = get_git_dir();

  }

  if (end_nul) {

    term = '\0';

    delim = '\n';

    key_delim = '\n';

  }

  if ((actions & (ACTION_GET_COLOR|ACTION_GET_COLORBOOL)) && type) {

    error(_("--get-color and variable type are incoherent"));

    usage_builtin_config();

  }

  if (HAS_MULTI_BITS(actions)) {

    error(_("only one action at a time"));

    usage_builtin_config();

  }

  if (actions == 0)

    switch (argc) {

    case 1: actions = ACTION_GET; break;

    case 2: actions = ACTION_SET; break;

    case 3: actions = ACTION_SET_ALL; break;

    default:

      usage_builtin_config();

    }

  if (omit_values &&

      !(actions == ACTION_LIST || actions == ACTION_GET_REGEXP)) {

    error(_("--name-only is only applicable to --list or --get-regexp"));

    usage_builtin_config();

  }

  if (show_origin && !(actions &

    (ACTION_GET|ACTION_GET_ALL|ACTION_GET_REGEXP|ACTION_LIST))) {

    error(_("--show-origin is only applicable to --get, --get-all, "

      "--get-regexp, and --list"));

    usage_builtin_config();

  }

  if (default_value && !(actions & ACTION_GET)) {

    error(_("--default is only applicable to --get"));

    usage_builtin_config();

  }

  /* check usage of --fixed-value */

  if (fixed_value) {

    int allowed_usage = 0;

    switch (actions) {

    /* git config --get <name> <value-pattern> */

    case ACTION_GET:

    /* git config --get-all <name> <value-pattern> */

    case ACTION_GET_ALL:

    /* git config --get-regexp <name-pattern> <value-pattern> */

    case ACTION_GET_REGEXP:

    /* git config --unset <name> <value-pattern> */

    case ACTION_UNSET:

    /* git config --unset-all <name> <value-pattern> */

    case ACTION_UNSET_ALL:

      allowed_usage = argc > 1 && !!argv[1];

      break;

    /* git config <name> <value> <value-pattern> */

    case ACTION_SET_ALL:

    /* git config --replace-all <name> <value> <value-pattern> */

    case ACTION_REPLACE_ALL:

      allowed_usage = argc > 2 && !!argv[2];

      break;

    /* other options don't allow --fixed-value */

    }

    if (!allowed_usage) {

      error(_("--fixed-value only applies with 'value-pattern'"));

      usage_builtin_config();

    }

    flags |= CONFIG_FLAGS_FIXED_VALUE;

  }

  if (actions & PAGING_ACTIONS)

    setup_auto_pager("config", 1);

  if (actions == ACTION_LIST) {

    check_argc(argc, 0, 0);

    if (config_with_options(show_all_config, NULL,

          &given_config_source, the_repository,

          &config_options) < 0) {

      if (given_config_source.file)

        die_errno(_("unable to read config file '%s'"),

            given_config_source.file);

      else

        die(_("error processing config file(s)"));

    }

  }

  else if (actions == ACTION_EDIT) {

    char *config_file;

    check_argc(argc, 0, 0);

    if (!given_config_source.file && nongit)

      die(_("not in a git directory"));

    if (given_config_source.use_stdin)

      die(_("editing stdin is not supported"));

    if (given_config_source.blob)

      die(_("editing blobs is not supported"));

    git_config(git_default_config, NULL);

    config_file = given_config_source.file ?

        xstrdup(given_config_source.file) :

        git_pathdup("config");

    if (use_global_config) {

      int fd = open(config_file, O_CREAT | O_EXCL | O_WRONLY, 0666);

      if (fd >= 0) {