This 35k message folder at work is getting burdensome. minc was

reading that entire folder everytime it stored a message there!  Twice
because mark(1) does it too.  The first is my fault, the second mh's.
I still haven't gone through mh to get rid of unnecessary readdirs, so
work around the problem here.

(get_highest_msgnum): Only read a directory once, saving the highest
message number and incrementing it on each call.

(mark): New function to add a message to a sequence.

(store_message): Use mark instead of running mark(1).

diff --git a/minc b/minc
index cbf2996..8ac7af2 100755 (executable)
--- a/minc
+++ b/minc
@@ -303,6 +303,7 @@ sub getfiles {
     return @result;
 }
 
+my %msgnum_cache;
 sub get_highest_msgnum {
     my $mhfolder = shift;
     my $dir;
@@ -310,6 +311,10 @@ sub get_highest_msgnum {
     my $highest;
     my $msgnum;
 
+    if (defined($msgnum_cache{$mhfolder})) {
+        return $msgnum_cache{$mhfolder}++;
+    }
+
     $dir = "$mh/$mhfolder";
     if (not opendir(DIR, $dir)) {
         die("opendir($dir): $!");
@@ -335,7 +340,36 @@ sub get_highest_msgnum {
         }
     }
 
-    return $highest;
+    return  $msgnum_cache{$mhfolder} = $highest;
+}
+
+sub mark {
+    my $folder = shift;
+    my $msgnum = shift;
+    my $seq = shift;
+    my $fn = "$mh/$folder/.mh_sequences";
+    my $fh;
+    my @sequences;
+
+    if (not open($fh, $fn)) {
+        $!{ENOENT} or die("open($fn): $!");
+    } else {
+        @sequences = <$fh>;
+        chomp(@sequences);
+    }
+
+    my $marked = 0;
+    open($fh, '>', $fn) or die("open(>$fn): $!");
+    for $_ (@sequences) {
+        if (/^$seq: /) {
+            print($fh "$_ $msgnum\n");
+            $marked = 1;
+        } else {
+            print($fh "$_\n");
+        }
+    }
+    $marked or print($fh "$seq: $msgnum\n");
+    close($fh) or die("close(>$fn): $!");
 }
 
 sub store_message {
@@ -412,15 +446,7 @@ sub store_message {
         if ($mhfolder eq 'SPAM') {
             push(@SPAM, $msgnum);
         } else {
-            $status = system('mark', "+$mhfolder", "$msgnum", '-sequence',
-                             'unseen', '-add');
-            # XXX need to handle signalled and stopped, and print
-            # the exit code or signal number.
-            if (not WIFEXITED($status)) {
-                die("Failed to run mark");
-            } elsif (WEXITSTATUS($status) != 0) {
-                die("Failed to mark message unseen.");
-            }
+            mark($mhfolder, $msgnum, 'unseen');
         }
     }