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#include "cache.h"
#include "string-list.h"

/*
 * This program exposes the C API of the configuration mechanism
 * as a set of simple commands in order to facilitate testing.
 *
 * Reads stdin and prints result of command to stdout:
 *
 * get_value -> prints the value with highest priority for the entered key
 *
 * get_value_multi -> prints all values for the entered key in increasing order
 *		     of priority
 *
 * get_int -> print integer value for the entered key or die
 *
 * get_bool -> print bool value for the entered key or die
 *
 * configset_get_value -> returns value with the highest priority for the entered key
 * 			from a config_set constructed from files entered as arguments.
 *
 * configset_get_value_multi -> returns value_list for the entered key sorted in
 * 				ascending order of priority from a config_set
 * 				constructed from files entered as arguments.
 *
 * Examples:
 *
 * To print the value with highest priority for key "foo.bAr Baz.rock":
 * 	test-config get_value "foo.bAr Baz.rock"
 *
 */


int main(int argc, char **argv)
{
	int i, val;
	const char *v;
	const struct string_list *strptr;
	struct config_set cs;
	git_configset_init(&cs);

	if (argc < 2) {
		fprintf(stderr, "Please, provide a command name on the command-line\n");
		goto exit1;
	} else if (argc == 3 && !strcmp(argv[1], "get_value")) {
		if (!git_config_get_value(argv[2], &v)) {
			if (!v)
				printf("(NULL)\n");
			else
				printf("%s\n", v);
			goto exit0;
		} else {
			printf("Value not found for \"%s\"\n", argv[2]);
			goto exit1;
		}
	} else if (argc == 3 && !strcmp(argv[1], "get_value_multi")) {
		strptr = git_config_get_value_multi(argv[2]);
		if (strptr) {
			for (i = 0; i < strptr->nr; i++) {
				v = strptr->items[i].string;
				if (!v)
					printf("(NULL)\n");
				else
					printf("%s\n", v);
			}
			goto exit0;
		} else {
			printf("Value not found for \"%s\"\n", argv[2]);
			goto exit1;
		}
	} else if (argc == 3 && !strcmp(argv[1], "get_int")) {
		if (!git_config_get_int(argv[2], &val)) {
			printf("%d\n", val);
			goto exit0;
		} else {
			printf("Value not found for \"%s\"\n", argv[2]);
			goto exit1;
		}
	} else if (argc == 3 && !strcmp(argv[1], "get_bool")) {
		if (!git_config_get_bool(argv[2], &val)) {
			printf("%d\n", val);
			goto exit0;
		} else {
			printf("Value not found for \"%s\"\n", argv[2]);
			goto exit1;
		}
	} else if (!strcmp(argv[1], "configset_get_value")) {
		for (i = 3; i < argc; i++) {
			int err;
			if ((err = git_configset_add_file(&cs, argv[i]))) {
				fprintf(stderr, "Error (%d) reading configuration file %s.\n", err, argv[i]);
				goto exit2;
			}
		}
		if (!git_configset_get_value(&cs, argv[2], &v)) {
			if (!v)
				printf("(NULL)\n");
			else
				printf("%s\n", v);
			goto exit0;
		} else {
			printf("Value not found for \"%s\"\n", argv[2]);
			goto exit1;
		}
	} else if (!strcmp(argv[1], "configset_get_value_multi")) {
		for (i = 3; i < argc; i++) {
			int err;
			if ((err = git_configset_add_file(&cs, argv[i]))) {
				fprintf(stderr, "Error (%d) reading configuration file %s.\n", err, argv[i]);
				goto exit2;
			}
		}
		strptr = git_configset_get_value_multi(&cs, argv[2]);
		if (strptr) {
			for (i = 0; i < strptr->nr; i++) {
				v = strptr->items[i].string;
				if (!v)
					printf("(NULL)\n");
				else
					printf("%s\n", v);
			}
			goto exit0;
		} else {
			printf("Value not found for \"%s\"\n", argv[2]);
			goto exit1;
		}
	}

	die("%s: Please check the syntax and the function name", argv[0]);

exit0:
	git_configset_clear(&cs);
	return 0;

exit1:
	git_configset_clear(&cs);
	return 1;

exit2:
	git_configset_clear(&cs);
	return 2;
}