Re: delete folder before writing to it

> Date: Fri, 09 Nov 2012 16:09:28 +0100
> From: Eric Smith <[email protected]>
> Subject: Re: delete folder before writing to it
>
> Robert Bonomi wrote on Fri-09-Nov 12  9:32AM
> > > :0c:
> > > {
> > > :0c:
> > > backup
> > > :0f
> > > | rm $MAILDIR/last
> > > :0:
> > > last
> > > }
> > >
> > 
> > try ':0fw' instead of ':0f'.  Must 'wait' for the pipe to complete, before
> > starting the next recipe.
>
> Thanks Robert, alas, it is still not playing nice. Nothing I 
> try leaves any (non-white) data in the folder last.
>
> Any ideas how to have the last and only the last email 
> always living in that folder.
>
> Eric
> ____________________________________________________________
>
>
> Robert Bonomi wrote on Fri-09-Nov 12  9:32AM
> > > :0c:
> > > {
> > > :0c:
> > > backup
> > > :0f
> > > | rm $MAILDIR/last
> > > :0:
> > > last
> > > }
> > >
> > 
> > try ':0fw' instead of ':0f'.  Must 'wait' for the pipe to complete, before
> > starting the next recipe.
>
> Thanks Robert, alas, it is still not playing nice. Nothing I 
> try leaves any (non-white) data in the folder last.

D'oh!  of course not!

The 'c' flag on the 'rm' recipe, causes it to be executed _in_parallel_
with following recipes.

try: 
 :0c:
 {
   foo=`rm $MAILDIR/last`
   :0c:
   backup
   :0:
   last
 }

> Any ideas how to have the last and only the last email 
> always living in that folder.

There's always:
  :0c : last
  | tee -a $MAILDIR/backup > $MAILDIR/last

to replace the entire gubbage you were using.

It's clearer, =and= somewhat faster, than your way.