# Leave the first line of this file blank!
# This is a Perl script; the following two lines allow us to avoid
# embedding the path of the perl interpreter in the script.
eval "exec perl -S $0 $*"
    if $running_under_some_shell;      

#-----------------------------------------------------------------------------#
# summarize_cvslog: A Perl script for summarizing CVS commitlog files.
#
# The commitlog for a set of changes gets generated with a different entry
# for each directory or branch changed.
# This script reads through the commitlog file, merging different
# entries with the same log message into a single combined entry.
#-----------------------------------------------------------------------------#

$prev_invariant_part_1 = "";
$prev_invariant_part_2 = "";
$prev_invariant_part_3 = "";
$prev_invariant_part_4 = "";
$accumulate_variant_part_1 = "";
$accumulate_variant_part_2 = "";
$accumulate_variant_part_3 = "";
$accumulate_variant_part_4 = "";

$next_blank_line = <>;
$next_asterisk_line = <>;

while(<>) {
	$blank_line = $next_blank_line;
	$asterisk_line = $next_asterisk_line;
	$date_line = $_;
	$author_line = <>;
	$blank_line_2 = <>;
	$repository_line = <>;
	$working_space_line = <>;
	$blank_line_3 = <>;

	$next = <>;

	$modified_files = "";
	until (!defined($next)
	    || $next =~ /^Log Message:/
	    || $next =~ /^File:/
	    || $next =~ /^\*\*\*\*\*\*\*\*\*\*\*\*\*/)
	{
		$modified_files .= $next;
		$next = <>;
	}
		
	$log_message = "";
	until (!defined($next)
	    || $next =~ /^File:/
	    || $next =~ /^\*\*\*\*\*\*\*\*\*\*\*\*\*/)
	{
		$log_message .= $next;
		$next = <>;
	}
		
	$files = "";
	until (!defined($next)
	    || $next =~ /^\*\*\*\*\*\*\*\*\*\*\*\*\*/)
	{
		$files .= $next;
		$prev = $next;
		$next = <>;
	}
		
	$next_blank_line = $prev;
	$next_asterisk_line = $next;

	$log_message =~ s/^Log Message:\n\n//;
	$log_message =~ s/\n\n*$/\n\n/;

	if (0) {
		print "[[[DEBUG INFO]]]\n" .
		"[[Date]]" . $date_line  .
		"[[author]]" . $author_line  .
		"[[blank]]" . $blank_line_2 .
		"[[repository]]" . $repository_line  .
		"[[ws]]" . $working_space_line  .
		"[[blank]]" . $blank_line_3  .
		"[[modified_files]]" . $modified_files  .
		"[[log]]" . $log_message  .
		"[[files]]" . $files  .
		"[[asterisk]]" . $asterisk_line .
		"[[[END DEBUG INFO]]]\n";
	}

	$invariant_part_1 = $blank_line . $asterisk_line;
	$variant_part_1 = $date_line;
	$invariant_part_2 = $author_line . $blank_line_2;
	$variant_part_2 = $repository_line .  $working_space_line .
		$modified_files;
	$invariant_part_3 = $blank_line_3 . $log_message;
	$variant_part_3 =  $files;
	$invariant_part_4 = "";
	$variant_part_4 = "";

	if ($invariant_part_1 ne $prev_invariant_part_1
		|| $invariant_part_2 ne $prev_invariant_part_2
		|| $invariant_part_3 ne $prev_invariant_part_3
		|| $invariant_part_4 ne $prev_invariant_part_4)
	{
		if (0) {
			if ($invariant_part_1 ne $prev_invariant_part_1) {
				print "<<1>>";
			}
			if ($invariant_part_2 ne $prev_invariant_part_2) {
				print "<<2>>";
			}
			if ($invariant_part_3 ne $prev_invariant_part_3) {
				print "<<3>>";
			}
			if ($invariant_part_4 ne $prev_invariant_part_4) {
				print "<<4>>";
			}
		}
		print $prev_invariant_part_1 . $accumulate_variant_part_1 .
			$prev_invariant_part_2 . $accumulate_variant_part_2 .
			$prev_invariant_part_3 . $accumulate_variant_part_3 .
			$prev_invariant_part_4 . $accumulate_variant_part_4;
		$accumulate_variant_part_1 = "";
		$accumulate_variant_part_2 = "";
		$accumulate_variant_part_3 = "";
		$accumulate_variant_part_4 = "";
		$prev_invariant_part_1 = $invariant_part_1;
		$prev_invariant_part_2 = $invariant_part_2;
		$prev_invariant_part_3 = $invariant_part_3;
		$prev_invariant_part_4 = $invariant_part_4;
	}
	$accumulate_variant_part_1 .= $variant_part_1;
	$accumulate_variant_part_2 .= $variant_part_2;
	$accumulate_variant_part_3 .= $variant_part_3;
	$accumulate_variant_part_4 .= $variant_part_4;
}

print $prev_invariant_part_1 . $accumulate_variant_part_1 .
	$prev_invariant_part_2 . $accumulate_variant_part_2 .
	$prev_invariant_part_3 . $accumulate_variant_part_3 .
	$prev_invariant_part_4 . $accumulate_variant_part_4;