#!/usr/bin/perl
#
#ident $Id: vers_string,v 2.1 2009/11/06 10:26:22 lukeh Exp $
#
# Implementation of SGS vers_string which uses CVSVersionInfo.txt.

require "cvslib.pl";

$OUTFILE = (-f "version.h") ? "version.h" : "vers.c";
$AUTHOR = `whoami`;
$HEADER = '$Id: vers_string,v 2.1 2009/11/06 10:26:22 lukeh Exp $';

if ($ENV{'PROGRAM'}) { $PROGRAM = $ENV{'PROGRAM'}; }

chop($AUTHOR);
chop($DATE=`date -u`);
chop($CWD=`pwd`);

($PROJECT, $VERSION) = split(/\-/, &getCVSVersionInfo());

if (!defined($PROJECT)) {
	$PROJECT = "Unknown";
	$PROGRAM = "Unknown";
} else {
	$SEP = "-";
	if (!defined($PROGRAM)) {
		chop($PROGRAM=`basename $CWD`);
	}
}

if ($ARGV[0] eq "-f") {
	print $PROJECT, $SEP, $VERSION, "\n";
} elsif ($ARGV[0] eq "-l") {
	print "static const char SGS_VERS[160] = \"";
	print '@(#)LIBRARY:', $PROGRAM, '  PROJECT:', $PROJECT, $SEP, $VERSION, '  DEVELOPER:', $AUTHOR,  '  BUILT:', $DATE;
	print "\";\n";
} elsif ($ARGV[0] eq "-c") {
	print "const char SGS_VERS[160] = \"";
	print '@(#)PROGRAM:', $PROGRAM, '  PROJECT:', $PROJECT, $SEP, $VERSION, '  DEVELOPER:', $AUTHOR,  '  BUILT:', $DATE;
	print "\";\n";
	print "const char VERS_NUM[10] = \"$VERSION\";\n";
} elsif ($ARGV[0] eq "-n") {
	print "$VERSION\n";
} elsif ($ARGV[0] eq "-B") {
	print 'PROGRAM:', $PROGRAM, '  PROJECT:', $PROJECT, $SEP, $VERSION, '  DEVELOPER:', $AUTHOR,  '  BUILT:NO DATE SET (-B used)',"\n";
} elsif ($ARGV[0] eq "-v") {
	unlink($OUTFILE);
	open(OUTFILE,">$OUTFILE");
	print OUTFILE "/* $OUTFILE built by $HEADER */\n";
	print OUTFILE "\n";
	if ($OUTFILE eq "version.h") {
		print OUTFILE "#define USE_SGS_VERS\n\n";
	}
	print OUTFILE "const char SGS_VERS[160] = \"";
	print OUTFILE '@(#)PROGRAM:', $PROGRAM, '  PROJECT:', $PROJECT, $SEP, $VERSION, '  DEVELOPER:', $AUTHOR,  '  BUILT:', $DATE;
	print OUTFILE "\";\n\n";
	print OUTFILE "const char VERS_NUM[10] = \"$VERSION\";\n\n";
	close(OUTFILE);
} elsif ($ARGV[0] ne "") {
	print STDERR "$HEADER\n";
	print STDERR "Copyright (C) 1997-1998 Luke Howard <lukeh\@gday.net.au>";
	print STDERR "\n\n";
	print STDERR "Unknown command line option $ARGV[0].\n";
	print STDERR "Usage: vers_string [-f|-l|-c|-n|-B|-v]\n";
	print STDERR "\t-f: echo project-n to stdout\n";
	print STDERR "\t-l: echo static const char SGS_VERS to stdout\n";
	print STDERR "\t-c: echo const char VERS_NUM and SGS_VERS to stdout\n";
	print STDERR "\t-n: echo version number to stdout\n";
	print STDERR "\t-B: emulate vers_string -B (why?)\n";
	print STDERR "\t-v: generate $OUTFILE\n";
	print STDERR "\tother options same as vers_string\n";
	print STDERR "\n";
	print STDERR "\tTo attach a project name and version number to a CVS\n";
	print STDERR "\tmodule, use checkpoint\n";
	print STDERR "\tTo find out the current project version, type cvsver\n";
	print STDERR "\tTo create a new project, type cvsnew [project]\n";
	print STDERR "\tTo sync with an existing project, type cvssync\n";
	print STDERR "\tTo create a project distribution, type tarup\n";
	print STDERR "\tTo commit a project, type commit [message]\n";
} else {
	print 'PROGRAM:', $PROGRAM, '  PROJECT:', $PROJECT, $SEP, $VERSION, '  DEVELOPER:', $AUTHOR,  '  BUILT:', $DATE;
	print "\n";
}