A BASH debug shell for scripts

bash-debug-shell.sh

#!/bin/bash
HISTSIZE="10000"
set -o history
 
function debug() {
  # Export arrays since BASH doesn't.
  declare -a -p |grep -v BASH_ > ${tmpdir}/bash_arrays
 
  history|sed -E 's/^[[:space:]]*[0-9]+[[:space:]]+//' > ${tmpdir}/debug.hist
  PS1="DEBUG SHELL> "  HISTFILE=$(ls ${tmpdir}/debug.hist)  /bin/bash --rcfile  ${tmpdir}/bash_arrays -o history|| true
}
 
trap debug INT
 
## Write you script
## Press ctrl-c to drop to the debug shell
## Insert "Read" statements to give yourself an opportunity to drop to the shell at specific points