Index: lib/sup/modes/thread-view-mode.rb
===================================================================
--- lib/sup/modes/thread-view-mode.rb	(revision 687)
+++ lib/sup/modes/thread-view-mode.rb	(working copy)
@@ -40,6 +40,7 @@
     k.add :delete_and_kill, "Delete thread and kill buffer", 'd'
     k.add :subscribe_to_list, "Subscribe to/unsubscribe from mailing list", "("
     k.add :unsubscribe_from_list, "Subscribe to/unsubscribe from mailing list", ")"
+    k.add :pipe, "Pipe message/attachment to shell command", '|'
   end
 
   ## there are a couple important instance variables we hold to format
@@ -80,6 +81,28 @@
     @thread.remove_label :unread
     regen_text
   end
+  
+  def pipe
+    command = BufferManager.ask(nil, "shell command: ") or return
+    shell = Session::Shell.new
+    output, error = '', ''
+    chunk = @chunk_lines[curpos] or return
+    case chunk
+    when Chunk::Attachment
+      shell.execute command, :stdin => chunk.raw_content, :stdout => output, :stderr => error
+    else
+      m = @message_lines[curpos]
+      shell.execute command, :stdin => m.raw_message, :stdout => output, :stderr => error
+    end
+    if !error.empty?
+      BufferManager.flash "Error: #{error}"
+    elsif output.empty?
+      BufferManager.flash "'#{command}' done"
+    else
+      b = BufferManager.spawn "output of '#{command}'", TextMode.new(output)
+      b.draw
+    end
+  end
 
   def draw_line ln, opts={}
     if ln == curpos