contrib: drop blameview/ directory

Blameview was a quick-and-dirty demonstration of how blame's
incremental output could be used in an interface. These days
one can find much better (and less ugly!) demonstrations in
"git gui blame" and "tig blame".

The only advantage blameview has is that its code is perhaps
simpler to read. However, that is balanced by the fact that
it probably has bugs, as nobody uses it nor has touched the
code in 6 years. An implementor is probably better off just
reading the "incremental output" section of "man git-blame".
Signed-off-by: NJeff King <peff@peff.net>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

contrib/blameview/README

-This is a sample program to use 'git-blame --incremental', based
-on this message.
-
-From: Jeff King <peff@peff.net>
-Subject: Re: More precise tag following
-To: Linus Torvalds <torvalds@linux-foundation.org>
-Cc: git@vger.kernel.org
-Date: Sat, 27 Jan 2007 18:52:38 -0500
-Message-ID: <20070127235238.GA28706@coredump.intra.peff.net>

contrib/blameview/blameview.perl

-#!/usr/bin/perl
-
-use Gtk2 -init;
-use Gtk2::SimpleList;
-
-my $hash;
-my $fn;
-if ( @ARGV == 1 ) {
-	$hash = "HEAD";
-	$fn = shift;
-} elsif ( @ARGV == 2 ) {
-	$hash = shift;
-	$fn = shift;
-} else {
-	die "Usage blameview [<rev>] <filename>";
-}
-
-Gtk2::Rc->parse_string(<<'EOS');
-style "treeview_style"
-{
-  GtkTreeView::vertical-separator = 0
-}
-class "GtkTreeView" style "treeview_style"
-EOS
-
-my $window = Gtk2::Window->new('toplevel');
-$window->signal_connect(destroy => sub { Gtk2->main_quit });
-my $vpan = Gtk2::VPaned->new();
-$window->add($vpan);
-my $scrolled_window = Gtk2::ScrolledWindow->new;
-$vpan->pack1($scrolled_window, 1, 1);
-my $fileview = Gtk2::SimpleList->new(
-    'Commit' => 'text',
-    'FileLine' => 'text',
-    'Data' => 'text'
-);
-$scrolled_window->add($fileview);
-$fileview->get_column(0)->set_spacing(0);
-$fileview->set_size_request(1024, 768);
-$fileview->set_rules_hint(1);
-$fileview->signal_connect (row_activated => sub {
-		my ($sl, $path, $column) = @_;
-		my $row_ref = $sl->get_row_data_from_path ($path);
-		system("blameview @$row_ref[0]~1 $fn &");
-		});
-
-my $commitwindow = Gtk2::ScrolledWindow->new();
-$commitwindow->set_policy ('GTK_POLICY_AUTOMATIC','GTK_POLICY_AUTOMATIC');
-$vpan->pack2($commitwindow, 1, 1);
-my $commit_text = Gtk2::TextView->new();
-my $commit_buffer = Gtk2::TextBuffer->new();
-$commit_text->set_buffer($commit_buffer);
-$commitwindow->add($commit_text);
-
-$fileview->signal_connect (cursor_changed => sub {
-		my ($sl) = @_;
-		my ($path, $focus_column) = $sl->get_cursor();
-		my $row_ref = $sl->get_row_data_from_path ($path);
-		my $c_fh;
-		open($c_fh,  '-|', "git cat-file commit @$row_ref[0]")
-					or die "unable to find commit @$row_ref[0]";
-		my @buffer = <$c_fh>;
-		$commit_buffer->set_text("@buffer");
-		close($c_fh);
-		});
-
-my $fh;
-open($fh, '-|', "git cat-file blob $hash:$fn")
-  or die "unable to open $fn: $!";
-
-while(<$fh>) {
-  chomp;
-  $fileview->{data}->[$.] = ['HEAD', "$fn:$.", $_];
-}
-
-my $blame;
-open($blame, '-|', qw(git blame --incremental --), $fn, $hash)
-    or die "cannot start git-blame $fn";
-
-Glib::IO->add_watch(fileno($blame), 'in', \&read_blame_line);
-
-$window->show_all;
-Gtk2->main;
-exit 0;
-
-my %commitinfo = ();
-
-sub flush_blame_line {
-	my ($attr) = @_;
-
-	return unless defined $attr;
-
-	my ($commit, $s_lno, $lno, $cnt) =
-	    @{$attr}{qw(COMMIT S_LNO LNO CNT)};
-
-	my ($filename, $author, $author_time, $author_tz) =
-	    @{$commitinfo{$commit}}{qw(FILENAME AUTHOR AUTHOR-TIME AUTHOR-TZ)};
-	my $info = $author . ' ' . format_time($author_time, $author_tz);
-
-	for(my $i = 0; $i < $cnt; $i++) {
-		@{$fileview->{data}->[$lno+$i-1]}[0,1,2] =
-		(substr($commit, 0, 8), $filename . ':' . ($s_lno+$i));
-	}
-}
-
-my $buf;
-my $current;
-sub read_blame_line {
-
-	my $r = sysread($blame, $buf, 1024, length($buf));
-	die "I/O error" unless defined $r;
-
-	if ($r == 0) {
-		flush_blame_line($current);
-		$current = undef;
-		return 0;
-	}
-
-	while ($buf =~ s/([^\n]*)\n//) {
-		my $line = $1;
-
-		if (($commit, $s_lno, $lno, $cnt) =
-		    ($line =~ /^([0-9a-f]{40}) (\d+) (\d+) (\d+)$/)) {
-			flush_blame_line($current);
-			$current = +{
-				COMMIT => $1,
-				S_LNO => $2,
-				LNO => $3,
-				CNT => $4,
-			};
-			next;
-		}
-
-		# extended attribute values
-		if ($line =~ /^(author|author-mail|author-time|author-tz|committer|committer-mail|committer-time|committer-tz|summary|filename) (.*)$/) {
-			my $commit = $current->{COMMIT};
-			$commitinfo{$commit}{uc($1)} = $2;
-			next;
-		}
-	}
-	return 1;
-}
-
-sub format_time {
-  my $time = shift;
-  my $tz = shift;
-
-  my $minutes = $tz < 0 ? 0-$tz : $tz;
-  $minutes = ($minutes / 100)*60 + ($minutes % 100);
-  $minutes = $tz < 0 ? 0-$minutes : $minutes;
-  $time += $minutes * 60;
-  my @t = gmtime($time);
-  return sprintf('%04d-%02d-%02d %02d:%02d:%02d %s',
-		 $t[5] + 1900, @t[4,3,2,1,0], $tz);
-}