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#include "builtin.h"
#include "cache.h"

static const char git_config_set_usage[] =
"git-config [ --global | --system | [ -f | --file ] config-file ] [ --bool | --int ] [ -z | --null ] [--get | --get-all | --get-regexp | --replace-all | --add | --unset | --unset-all] name [value [value_regex]] | --rename-section old_name new_name | --remove-section name | --list";

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 enum { T_RAW, T_INT, T_BOOL } type = T_RAW;

static int show_all_config(const char *key_, const char *value_)
{
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_)
{
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 (type == T_INT)
sprintf(value, "%d", git_config_int(key_, value_?value_:""));
else if (type == T_BOOL)
vptr = git_config_bool(key_, value_) ? "true" : "false";
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 = getenv(CONFIG_ENVIRONMENT);
if (!local) {
const char *home = getenv("HOME");
local = getenv(CONFIG_LOCAL_ENVIRONMENT);
if (!local)
local = repo_config = xstrdup(git_path("config"));
if (home)
global = xstrdup(mkpath("%s/.gitconfig", home));
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);
if (do_all && global)
git_config_from_file(show_config, global);
git_config_from_file(show_config, local);
if (!do_all && !seen && global)
git_config_from_file(show_config, global);
if (!do_all && !seen && system_wide)
git_config_from_file(show_config, system_wide);

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;
}

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

if (!value)
return NULL;

if (type == T_RAW)
normalized = xstrdup(value);
else {
normalized = xmalloc(64);
if (type == T_INT) {
int v = git_config_int(key, value);
sprintf(normalized, "%d", v);
}
else if (type == T_BOOL)
sprintf(normalized, "%s",
git_config_bool(key, value) ? "true" : "false");
}

return normalized;
}

int cmd_config(int argc, const char **argv, const char *prefix)
{
int nongit = 0;
char* value;
setup_git_directory_gently(&nongit);

while (1 < argc) {
if (!strcmp(argv[1], "--int"))
type = T_INT;
else if (!strcmp(argv[1], "--bool"))
type = T_BOOL;
else if (!strcmp(argv[1], "--list") || !strcmp(argv[1], "-l"))
return git_config(show_all_config);
else if (!strcmp(argv[1], "--global")) {
char *home = getenv("HOME");
if (home) {
char *user_config = xstrdup(mkpath("%s/.gitconfig", home));
setenv(CONFIG_ENVIRONMENT, user_config, 1);
free(user_config);
} else {
die("$HOME not set");
}
}
else if (!strcmp(argv[1], "--system"))
setenv(CONFIG_ENVIRONMENT, git_etc_gitconfig(), 1);
else if (!strcmp(argv[1], "--file") || !strcmp(argv[1], "-f")) {
if (argc < 3)
usage(git_config_set_usage);
setenv(CONFIG_ENVIRONMENT, argv[2], 1);
argc--;
argv++;
}
else if (!strcmp(argv[1], "--null") || !strcmp(argv[1], "-z")) {
term = '\0';
delim = '\n';
key_delim = '\n';
}
else if (!strcmp(argv[1], "--rename-section")) {
int ret;
if (argc != 4)
usage(git_config_set_usage);
ret = git_config_rename_section(argv[2], argv[3]);
if (ret < 0)
return ret;
if (ret == 0) {
fprintf(stderr, "No such section!\n");
return 1;
}
return 0;
}
else if (!strcmp(argv[1], "--remove-section")) {
int ret;
if (argc != 3)
usage(git_config_set_usage);
ret = git_config_rename_section(argv[2], NULL);
if (ret < 0)
return ret;
if (ret == 0) {
fprintf(stderr, "No such section!\n");
return 1;
}
return 0;
}
else
break;
argc--;
argv++;
}

switch (argc) {
case 2:
return get_value(argv[1], NULL);
case 3:
if (!strcmp(argv[1], "--unset"))
return git_config_set(argv[2], NULL);
else if (!strcmp(argv[1], "--unset-all"))
return git_config_set_multivar(argv[2], NULL, NULL, 1);
else if (!strcmp(argv[1], "--get"))
return get_value(argv[2], NULL);
else if (!strcmp(argv[1], "--get-all")) {
do_all = 1;
return get_value(argv[2], NULL);
} else if (!strcmp(argv[1], "--get-regexp")) {
show_keys = 1;
use_key_regexp = 1;
do_all = 1;
return get_value(argv[2], NULL);
} else {
value = normalize_value(argv[1], argv[2]);
return git_config_set(argv[1], value);
}
case 4:
if (!strcmp(argv[1], "--unset"))
return git_config_set_multivar(argv[2], NULL, argv[3], 0);
else if (!strcmp(argv[1], "--unset-all"))
return git_config_set_multivar(argv[2], NULL, argv[3], 1);
else if (!strcmp(argv[1], "--get"))
return get_value(argv[2], argv[3]);
else if (!strcmp(argv[1], "--get-all")) {
do_all = 1;
return get_value(argv[2], argv[3]);
} else if (!strcmp(argv[1], "--get-regexp")) {
show_keys = 1;
use_key_regexp = 1;
do_all = 1;
return get_value(argv[2], argv[3]);
} else if (!strcmp(argv[1], "--add")) {
value = normalize_value(argv[2], argv[3]);
return git_config_set_multivar(argv[2], value, "^$", 0);
} else if (!strcmp(argv[1], "--replace-all")) {
value = normalize_value(argv[2], argv[3]);
return git_config_set_multivar(argv[2], value, NULL, 1);
} else {
value = normalize_value(argv[1], argv[2]);
return git_config_set_multivar(argv[1], value, argv[3], 0);
}
case 5:
if (!strcmp(argv[1], "--replace-all")) {
value = normalize_value(argv[2], argv[3]);
return git_config_set_multivar(argv[2], value, argv[4], 1);
}
case 1:
default:
usage(git_config_set_usage);
}
return 0;
}
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