From 790ad0c146598175d7cca5f0c711ec217e196369 Mon Sep 17 00:00:00 2001
From: Zygo Blaxell <zblaxell@esightcorp.com>
Date: Thu, 13 May 2010 16:40:23 -0400
Subject: [PATCH] Replace progress reports with single-character markers

---
 dm6 | 30 +++++++++++++++++++++---------
 1 file changed, 21 insertions(+), 9 deletions(-)

diff --git a/dm6 b/dm6
index 35fda9c..a5d56a6 100755
--- a/dm6
+++ b/dm6
@@ -48,19 +48,22 @@ USAGE
 sub link_files {
 	my ($from, $to) = (@_);
 
-	print STDERR "link '$from' '$to' ...";
+	print STDERR 'T';
 	my $inode_dir = $to;
 	my $inode_base = $to;
 	$inode_dir =~ s:[^/]*$::o;
 	$inode_base =~ s:^.*/::os;
 	my $tmp_to = File::Temp::tempnam($inode_dir, ".$inode_base.");
+	print STDERR "\bL";
 	link($from, $tmp_to) or die "link: $from -> $tmp_to: $!";
+	print STDERR "\bR";
 	unless (rename($tmp_to, $to)) {
 		my $saved_bang = $!;
+		print STDERR "\bU";
 		unlink($tmp_to) or warn "unlink: $tmp_to: $!";	# Try, possibly in vain, to clean up
 		die "rename: $tmp_to -> $from: $saved_bang";
 	}
-	print STDERR "\n";
+	print STDERR "\b \b";
 }
 
 my $link_dir = shift @ARGV;
@@ -79,7 +82,9 @@ sub prepare_parents {
 	my ($link_dir, $file) = @_;
 	my ($prefix, $suffix) = slash_prefix($file);
 	my $parent = "$link_dir/$prefix";
-	mkpath($parent, { verbose => 1 });
+	print STDERR 'm';
+	mkpath($parent, { verbose => 0 });
+	print STDERR "\b";
 	die "mkpath: $parent: $!" unless -d $parent;
 	return "$parent/$suffix";
 }
@@ -95,6 +100,7 @@ while (<STDIN>) {
 			chomp $file;
 
 			# Get file stat data
+			print STDERR '.';
 			my $st = lstat($file);
 			die "lstat: $file: $!" unless $st;
 
@@ -106,6 +112,7 @@ while (<STDIN>) {
 
 			# Check link to inode
 			my $inode_link = prepare_parents("$link_dir/inode", $st->ino);
+			print STDERR 'I';
 			my $inode_st = lstat($inode_link);
 			my $update_links;
 			if ($inode_st) {
@@ -121,26 +128,27 @@ while (<STDIN>) {
 			} else {
 				$update_links = 1;
 			}
+			print STDERR "\b";
 
 			# If neither criteria for updating link is met, leave it as-is
 			next unless $update_links;
 
 			# Compute digest
-			print STDERR "digest($file) = ";
+			print STDERR 'd';
 			my $digest = digest($file);
+			print STDERR "\b";
 
 			# Base64 uses /, we prefer _
 			$digest =~ y:/:_:;
 
-			print STDERR "$digest\n";
-
 			# Check link to digest
 			my $digest_link = prepare_parents("$link_dir/digest", $digest);
+			print STDERR 'D';
 			my $digest_st = lstat($digest_link);
 			if ($digest_st) {
 				my $digest_nlink = $digest_st->nlink;
 				if ($digest_nlink > 31990) {
-					print STDERR "Removing '$digest_link' with $digest_nlink links\n";
+					print STDERR 'u';
 					unlink($digest_link) or die "unlink: $digest_link: $!";
 					undef $digest_st;
 				}
@@ -148,11 +156,15 @@ while (<STDIN>) {
 
 			# If digest link exists, link it to file
 			if ($digest_st) {
-				print STDERR "cmp '$digest_link' '$file' ...";
+				print STDERR 'c';
 				die "NOT identical!" if compare($digest_link, $file);
-				print STDERR "\n";
+
+				# Old, replace input with old file
+				print STDERR '-';
 				link_files($digest_link, $file);
 			} else {
+				# New, add input to digest
+				print STDERR '+';
 				link_files($file, $digest_link);
 			}
 
-- 
2.30.2