#!/bin/bash
#
# Make sure I'm the only one running, then loop through any entries in
# the worklist directory running them till there are no more.
#
mydir=`dirname $0`
PATH=`$mydir/echo-path`
export PATH
topdir="/huge/vids"
whodir="$topdir/DoctorWho"
dbdir="$whodir/.data"
workdir="$dbdir/worklist"
if [ -d "$workdir" ]
then
   cd "$workdir"
   if [ -f "keeper.pid" ]
   then
      echo "keeper.pid" already exists 1>&2
      exit 0
   fi
   echo $$ > keeper.pid
   mypid=`cat keeper.pid`
   if [ "$$" = "$mypid" ]
   then

      # OK, it looks like I am the one who needs to really transcode
      # some files. Let's do them one after another till I run out.
      # Set KEEPER_PID env var so jobs can tell if they are running
      # under this script

      KEEPER_PID="$$"
      export KEEPER_PID
      trap "rm -f keeper.pid" EXIT
      while true
      do
         workfile=`ls -1 *.work 2>/dev/null | head -1`
         if [ -f "$workfile" ]
         then
            bash ./"$workfile"
            rm -f $workfile
         else
            # When transcoding is done, build a new web page index.
            build-web
            exit 0
         fi
      done
   fi
else
   echo "$workdir" is not a directory 1>&2
   exit 2
fi