/*-------------------------------------------------------------------------
 *
 * pg_config.c
 *
 * This program reports various pieces of information about the
 * installed version of PostgreSQL.  Packages that interface to
 * PostgreSQL can use it to configure their build.
 *
 * This is a C implementation of the previous shell script written by
 * Peter Eisentraut <peter_e@gmx.net>, with adjustments made to
 * accomodate the possibility that the installation has been relocated from
 * the place originally configured.
 *
 * author of C translation: Andrew Dunstan	   mailto:andrew@dunslane.net
 *
 * This code is released under the terms of the PostgreSQL License.
 *
 * Portions Copyright (c) 1996-2005, PostgreSQL Global Development Group
 *
 * $PostgreSQL: pgsql/src/bin/pg_config/pg_config.c,v 1.11 2005/02/22 04:38:40 momjian Exp $
 *
 *-------------------------------------------------------------------------
 */

#include "postgres.h"
#include "port.h"
#include <stdio.h>

static const char *progname;

static void
help(void)
{
	printf(_("\n%s provides information about the installed version of PostgreSQL.\n\n"), progname);
	printf(_("Usage:\n"));
	printf(_("  %s OPTION...\n\n"), progname);
	printf(_("Options:\n"));
	printf(_("  --bindir              show location of user executables\n"));
	printf(_("  --includedir          show location of C header files of the client\n"
		 "                        interfaces\n"));
	printf(_("  --includedir-server   show location of C header files for the server\n"));
	printf(_("  --libdir              show location of object code libraries\n"));
	printf(_("  --pkglibdir           show location of dynamically loadable modules\n"));
	printf(_("  --pgxs                show location of extension makefile\n"));
	printf(_("  --configure           show options given to \"configure\" script when\n"
			 "                        PostgreSQL was built\n"));
	printf(_("  --version             show the PostgreSQL version, then exit\n"));
	printf(_("  --help                show this help, then exit\n\n"));
	printf(_("Report bugs to <pgsql-bugs@postgresql.org>.\n"));
}

static void
advice(void)
{
	fprintf(stderr, _("\nTry \"%s --help\" for more information\n"), progname);
}


int
main(int argc, char **argv)
{
	int			i;
	int			ret;
	char		mypath[MAXPGPATH];
	char		otherpath[MAXPGPATH];

	set_pglocale_pgservice(argv[0], "pg_config");

	progname = get_progname(argv[0]);

	if (argc < 2)
	{
		fprintf(stderr, _("%s: argument required\n"), progname);
		advice();
		exit(1);
	}

	for (i = 1; i < argc; i++)
	{
		if (strcmp(argv[i], "--bindir") == 0 ||
			strcmp(argv[i], "--includedir") == 0 ||
			strcmp(argv[i], "--includedir-server") == 0 ||
			strcmp(argv[i], "--libdir") == 0 ||
			strcmp(argv[i], "--pkglibdir") == 0 ||
			strcmp(argv[i], "--pgxs") == 0 ||
			strcmp(argv[i], "--configure") == 0)
		{
			/* come back to these later */
			continue;
		}

		if (strcmp(argv[i], "--version") == 0)
		{
			printf("PostgreSQL " PG_VERSION "\n");
			exit(0);
		}
		if (strcmp(argv[i], "--help") == 0 || strcmp(argv[i], "-?") == 0)
		{
			help();
			exit(0);
		}
		fprintf(stderr, _("%s: invalid argument: %s\n"), progname, argv[i]);
		advice();
		exit(1);
	}

	ret = find_my_exec(argv[0], mypath);

	if (ret)
	{
		fprintf(stderr, _("%s: could not find own executable\n"), progname);
		exit(1);
	}

	for (i = 1; i < argc; i++)
	{
		if (strcmp(argv[i], "--configure") == 0)
		{
			/* the VAL_CONFIGURE macro must be defined by the Makefile */
			printf("%s\n", VAL_CONFIGURE);
			continue;
		}

		if (strcmp(argv[i], "--bindir") == 0)
		{
			/* assume we are located in the bindir */
			char	   *lastsep;

			strcpy(otherpath, mypath);
			lastsep = strrchr(otherpath, '/');
			if (lastsep)
				*lastsep = '\0';
		}
		else if (strcmp(argv[i], "--includedir") == 0)
			get_include_path(mypath, otherpath);
		else if (strcmp(argv[i], "--includedir-server") == 0)
			get_includeserver_path(mypath, otherpath);
		else if (strcmp(argv[i], "--libdir") == 0)
			get_lib_path(mypath, otherpath);
		else if (strcmp(argv[i], "--pkglibdir") == 0)
			get_pkglib_path(mypath, otherpath);
		else if (strcmp(argv[i], "--pgxs") == 0)
		{
			get_pkglib_path(mypath, otherpath);
			strncat(otherpath, "/pgxs/src/makefiles/pgxs.mk", MAXPGPATH - 1);
		}

		printf("%s\n", otherpath);
	}

	return 0;
}
