paging.rb in rib-1.2.3

- old
+ new

@@ -8,10 +8,11 @@
   # --------------- Rib API ---------------
 
   # Print result if the it fits one screen,
   # paging it through a pager otherwise.
   def print_result result
+    return super if Paging.disabled?
     output = format_result(result)
     if one_screen?(output)
       puts output
     else
       page_result(output)
@@ -30,13 +31,20 @@
 
   def page_result output
     less = IO.popen(pager, 'w')
     less.write(output)
     less.close_write
-  rescue Errno::EPIPE => e
-    Rib.warn("Error while paging result:\n  #{format_error(e)}")
+  rescue Errno::EPIPE
+    # less quit without consuming all the input
   end
 
   def pager
     ENV['PAGER'] || 'less -R'
   end
+end
+
+pager = ENV['PAGER'] || 'less'
+
+if `which #{pager}`.empty?
+  Rib.warn("#{pager} is not available, disabling Rib::Paging")
+  Rib::Paging.disable
 end