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#include "builtin.h"
#include "cache.h"
#include "color.h"
#include "parse-options.h"

static const char *const builtin_config_usage[] = {
"git config [options]",
NULL
};

static char *key;
static regex_t *key_regexp;
static regex_t *regexp;
static int show_keys;
static int use_key_regexp;
static int do_all;
static int do_not_match;
static int seen;
static char delim = '=';
static char key_delim = ' ';
static char term = '\n';

static int use_global_config, use_system_config;
static const char *given_config_file;
static int actions, types;
static const char *get_color_slot, *get_colorbool_slot;
static int end_null;

#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 TYPE_BOOL (1<<0)
#define TYPE_INT (1<<1)
#define TYPE_BOOL_OR_INT (1<<2)

static struct option builtin_config_options[] = {
OPT_GROUP("Config file location"),
OPT_BOOLEAN(0, "global", &use_global_config, "use global config file"),
OPT_BOOLEAN(0, "system", &use_system_config, "use system config file"),
OPT_STRING('f', "file", &given_config_file, "FILE", "use given config file"),
OPT_GROUP("Action"),
OPT_BIT(0, "get", &actions, "get value: name [value-regex]", ACTION_GET),
OPT_BIT(0, "get-all", &actions, "get all values: key [value-regex]", ACTION_GET_ALL),
OPT_BIT(0, "get-regexp", &actions, "get values for regexp: name-regex [value-regex]", ACTION_GET_REGEXP),
OPT_BIT(0, "replace-all", &actions, "replace all matching variables: name value [value_regex]", ACTION_REPLACE_ALL),
OPT_BIT(0, "add", &actions, "adds a new variable: name value", ACTION_ADD),
OPT_BIT(0, "unset", &actions, "removes a variable: name [value-regex]", ACTION_UNSET),
OPT_BIT(0, "unset-all", &actions, "removes all matches: name [value-regex]", ACTION_UNSET_ALL),
OPT_BIT(0, "rename-section", &actions, "rename section: old-name new-name", ACTION_RENAME_SECTION),
OPT_BIT(0, "remove-section", &actions, "remove a section: name", ACTION_REMOVE_SECTION),
OPT_BIT('l', "list", &actions, "list all", ACTION_LIST),
OPT_BIT('e', "edit", &actions, "opens an editor", ACTION_EDIT),
OPT_STRING(0, "get-color", &get_color_slot, "slot", "find the color configured: [default]"),
OPT_STRING(0, "get-colorbool", &get_colorbool_slot, "slot", "find the color setting: [stdout-is-tty]"),
OPT_GROUP("Type"),
OPT_BIT(0, "bool", &types, "value is \"true\" or \"false\"", TYPE_BOOL),
OPT_BIT(0, "int", &types, "value is decimal number", TYPE_INT),
OPT_BIT(0, "bool-or-int", &types, "value is --bool or --int", TYPE_BOOL_OR_INT),
OPT_GROUP("Other"),
OPT_BOOLEAN('z', "null", &end_null, "terminate values with NUL byte"),
OPT_END(),
};

static void check_argc(int argc, int min, int max) {
if (argc >= min && argc <= max)
return;
error("wrong number of arguments");
usage_with_options(builtin_config_usage, builtin_config_options);
}

static int show_all_config(const char *key_, const char *value_, void *cb)
{
if (value_)
printf("%s%c%s%c", key_, delim, value_, term);
else
printf("%s%c", key_, term);
return 0;
}

static int show_config(const char *key_, const char *value_, void *cb)
{
char value[256];
const char *vptr = value;
int dup_error = 0;

if (!use_key_regexp && strcmp(key_, key))
return 0;
if (use_key_regexp && regexec(key_regexp, key_, 0, NULL, 0))
return 0;
if (regexp != NULL &&
(do_not_match ^ !!regexec(regexp, (value_?value_:""), 0, NULL, 0)))
return 0;

if (show_keys) {
if (value_)
printf("%s%c", key_, key_delim);
else
printf("%s", key_);
}
if (seen && !do_all)
dup_error = 1;
if (types == TYPE_INT)
sprintf(value, "%d", git_config_int(key_, value_?value_:""));
else if (types == TYPE_BOOL)
vptr = git_config_bool(key_, value_) ? "true" : "false";
else if (types == TYPE_BOOL_OR_INT) {
int is_bool, v;
v = git_config_bool_or_int(key_, value_, &is_bool);
if (is_bool)
vptr = v ? "true" : "false";
else
sprintf(value, "%d", v);
}
else
vptr = value_?value_:"";
seen++;
if (dup_error) {
error("More than one value for the key %s: %s",
key_, vptr);
}
else
printf("%s%c", vptr, term);

return 0;
}

static int get_value(const char *key_, const char *regex_)
{
int ret = -1;
char *tl;
char *global = NULL, *repo_config = NULL;
const char *system_wide = NULL, *local;

local = config_exclusive_filename;
if (!local) {
const char *home = getenv("HOME");
local = repo_config = git_pathdup("config");
if (git_config_global() && home)
global = xstrdup(mkpath("%s/.gitconfig", home));
if (git_config_system())
system_wide = git_etc_gitconfig();
}

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);

if (use_key_regexp) {
key_regexp = (regex_t*)xmalloc(sizeof(regex_t));
if (regcomp(key_regexp, key, REG_EXTENDED)) {
fprintf(stderr, "Invalid key pattern: %s\n", key_);
goto free_strings;
}
}

if (regex_) {
if (regex_[0] == '!') {
do_not_match = 1;
regex_++;
}

regexp = (regex_t*)xmalloc(sizeof(regex_t));
if (regcomp(regexp, regex_, REG_EXTENDED)) {
fprintf(stderr, "Invalid pattern: %s\n", regex_);
goto free_strings;
}
}

if (do_all && system_wide)
git_config_from_file(show_config, system_wide, NULL);
if (do_all && global)
git_config_from_file(show_config, global, NULL);
git_config_from_file(show_config, local, NULL);
if (!do_all && !seen && global)
git_config_from_file(show_config, global, NULL);
if (!do_all && !seen && system_wide)
git_config_from_file(show_config, system_wide, NULL);

free(key);
if (regexp) {
regfree(regexp);
free(regexp);
}

if (do_all)
ret = !seen;
else
ret = (seen == 1) ? 0 : seen > 1 ? 2 : 1;

free_strings:
free(repo_config);
free(global);
return ret;
}

static char *normalize_value(const char *key, const char *value)
{
char *normalized;

if (!value)
return NULL;

if (types == 0)
normalized = xstrdup(value);
else {
normalized = xmalloc(64);
if (types == TYPE_INT) {
int v = git_config_int(key, value);
sprintf(normalized, "%d", v);
}
else if (types == TYPE_BOOL)
sprintf(normalized, "%s",
git_config_bool(key, value) ? "true" : "false");
else if (types == TYPE_BOOL_OR_INT) {
int is_bool, v;
v = git_config_bool_or_int(key, value, &is_bool);
if (!is_bool)
sprintf(normalized, "%d", v);
else
sprintf(normalized, "%s", v ? "true" : "false");
}
}

return normalized;
}

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, void *cb)
{
if (!strcmp(var, get_color_slot)) {
if (!value)
config_error_nonbool(var);
color_parse(value, var, parsed_color);
get_color_found = 1;
}
return 0;
}

static void get_color(const char *def_color)
{
get_color_found = 0;
parsed_color[0] = '\0';
git_config(git_get_color_config, NULL);

if (!get_color_found && def_color)
color_parse(def_color, "command line", parsed_color);

fputs(parsed_color, stdout);
}

static int stdout_is_tty;
static int get_colorbool_found;
static int get_diff_color_found;
static int git_get_colorbool_config(const char *var, const char *value,
void *cb)
{
if (!strcmp(var, get_colorbool_slot)) {
get_colorbool_found =
git_config_colorbool(var, value, stdout_is_tty);
}
if (!strcmp(var, "diff.color")) {
get_diff_color_found =
git_config_colorbool(var, value, stdout_is_tty);
}
if (!strcmp(var, "color.ui")) {
git_use_color_default = git_config_colorbool(var, value, stdout_is_tty);
return 0;
}
return 0;
}

static int get_colorbool(int print)
{
get_colorbool_found = -1;
get_diff_color_found = -1;
git_config(git_get_colorbool_config, NULL);

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 = git_use_color_default;
}

if (print) {
printf("%s\n", get_colorbool_found ? "true" : "false");
return 0;
} else
return get_colorbool_found ? 0 : 1;
}

int cmd_config(int argc, const char **argv, const char *unused_prefix)
{
int nongit;
char *value;
const char *prefix = setup_git_directory_gently(&nongit);

config_exclusive_filename = 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 + !!given_config_file > 1) {
error("only one config file at a time.");
usage_with_options(builtin_config_usage, builtin_config_options);
}

if (use_global_config) {
char *home = getenv("HOME");
if (home) {
char *user_config = xstrdup(mkpath("%s/.gitconfig", home));
config_exclusive_filename = user_config;
} else {
die("$HOME not set");
}
}
else if (use_system_config)
config_exclusive_filename = git_etc_gitconfig();
else if (given_config_file) {
if (!is_absolute_path(given_config_file) && prefix)
config_exclusive_filename = prefix_filename(prefix,
strlen(prefix),
argv[2]);
else
config_exclusive_filename = given_config_file;
}

if (end_null) {
term = '\0';
delim = '\n';
key_delim = '\n';
}

if (HAS_MULTI_BITS(types)) {
error("only one type at a time.");
usage_with_options(builtin_config_usage, builtin_config_options);
}

if (get_color_slot)
actions |= ACTION_GET_COLOR;
if (get_colorbool_slot)
actions |= ACTION_GET_COLORBOOL;

if ((get_color_slot || get_colorbool_slot) && types) {
error("--get-color and variable type are incoherent");
usage_with_options(builtin_config_usage, builtin_config_options);
}

if (HAS_MULTI_BITS(actions)) {
error("only one action at a time.");
usage_with_options(builtin_config_usage, builtin_config_options);
}
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_with_options(builtin_config_usage, builtin_config_options);
}

if (actions == ACTION_LIST) {
check_argc(argc, 0, 0);
if (git_config(show_all_config, NULL) < 0) {
if (config_exclusive_filename)
die_errno("unable to read config file '%s'",
config_exclusive_filename);
else
die("error processing config file(s)");
}
}
else if (actions == ACTION_EDIT) {
check_argc(argc, 0, 0);
if (!config_exclusive_filename && nongit)
die("not in a git directory");
git_config(git_default_config, NULL);
launch_editor(config_exclusive_filename ?
config_exclusive_filename : git_path("config"),
NULL, NULL);
}
else if (actions == ACTION_SET) {
check_argc(argc, 2, 2);
value = normalize_value(argv[0], argv[1]);
return git_config_set(argv[0], value);
}
else if (actions == ACTION_SET_ALL) {
check_argc(argc, 2, 3);
value = normalize_value(argv[0], argv[1]);
return git_config_set_multivar(argv[0], value, argv[2], 0);
}
else if (actions == ACTION_ADD) {
check_argc(argc, 2, 2);
value = normalize_value(argv[0], argv[1]);
return git_config_set_multivar(argv[0], value, "^$", 0);
}
else if (actions == ACTION_REPLACE_ALL) {
check_argc(argc, 2, 3);
value = normalize_value(argv[0], argv[1]);
return git_config_set_multivar(argv[0], value, argv[2], 1);
}
else if (actions == ACTION_GET) {
check_argc(argc, 1, 2);
return get_value(argv[0], argv[1]);
}
else if (actions == ACTION_GET_ALL) {
do_all = 1;
check_argc(argc, 1, 2);
return get_value(argv[0], argv[1]);
}
else if (actions == ACTION_GET_REGEXP) {
show_keys = 1;
use_key_regexp = 1;
do_all = 1;
check_argc(argc, 1, 2);
return get_value(argv[0], argv[1]);
}
else if (actions == ACTION_UNSET) {
check_argc(argc, 1, 2);
if (argc == 2)
return git_config_set_multivar(argv[0], NULL, argv[1], 0);
else
return git_config_set(argv[0], NULL);
}
else if (actions == ACTION_UNSET_ALL) {
check_argc(argc, 1, 2);
return git_config_set_multivar(argv[0], NULL, argv[1], 1);
}
else if (actions == ACTION_RENAME_SECTION) {
int ret;
check_argc(argc, 2, 2);
ret = git_config_rename_section(argv[0], argv[1]);
if (ret < 0)
return ret;
if (ret == 0)
die("No such section!");
}
else if (actions == ACTION_REMOVE_SECTION) {
int ret;
check_argc(argc, 1, 1);
ret = git_config_rename_section(argv[0], NULL);
if (ret < 0)
return ret;
if (ret == 0)
die("No such section!");
}
else if (actions == ACTION_GET_COLOR) {
get_color(argv[0]);
}
else if (actions == ACTION_GET_COLORBOOL) {
if (argc == 1)
stdout_is_tty = git_config_bool("command line", argv[0]);
else if (argc == 0)
stdout_is_tty = isatty(1);
return get_colorbool(argc != 0);
}

return 0;
}
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