PS4='+ $(date "+%s.%N") $BASH_SOURCE:$LINENO#$FUNCNAME \011 '
set -x
Example Output:
++ 1355955482.N ./.bashrc:11 source ./.rvm/scripts/rvm
+++ 1355955482.N ./.rvm/scripts/rvm:21 __rvm_has_opt posix
+++ 1355955482.N ./.rvm/scripts/rvm:2 [[ -n '' ]]
+++ 1355955482.N ./.rvm/scripts/rvm:5 [[ -n 3.2.48(1)-release ]]
+++ 1355955482.N ./.rvm/scripts/rvm:5 [[ :braceexpand:emacs:hashall:histexpand:history:interactive-comments:monitor:xtrace: =~ :posix: ]]
+++ 1355955482.N ./.rvm/scripts/rvm:7 return 1
+++ 1355955482.N ./.rvm/scripts/rvm:26 export HOME rvm_prefix rvm_user_install_flag rvm_path