Bug 40045: Add lock on tools/tb-build-01-start-nightly-build

#!/bin/bash

set -e

function getlock {

  lockfile=/run/lock/tb-build-01-start-nightly-build.lock

  if test -f $lockfile

  then

    old_pid=$(cat $lockfile)

    if test -z "$old_pid" || ! test -d "/proc/$old_pid"

    then

      echo "Removing old lockfile: $lockfile"

      rm -f $lockfile

    else

      echo "Script already running. Exiting." 1>&2

      exit 0

    fi

  fi

  echo $$ > $lockfile

  trap "rm -f $lockfile" EXIT

}

getlock

today_version=$(date '+tbb-nightly.%Y.%m.%d')

cd /home/tb-builder/tor-browser-bundle-testsuite