plugins/history: Add autoshare to $HISTCONTROL

plugins/available/history.plugin.bash

@@ -5,15 +5,17 @@ about-plugin 'improve history handling with sane defaults'
 # variable when the shell exits, rather than overwriting the file.
 shopt -s histappend
 
-# erase duplicates; alternative option: HISTCONTROL=ignoredups
-: "${HISTCONTROL:=ignorespace:erasedups}"
+# 'ignorespace': don't save command lines which begin with a space to history
+# 'erasedups' (alternative 'ignoredups'): don't save duplicates to history
+# 'autoshare': automatically share history between multiple running shells
+: "${HISTCONTROL:=ignorespace:erasedups:autoshare}"
+
+safe_append_preexec '_bash_it_history_auto_save'
+safe_append_prompt_command '_bash_it_history_auto_load'
 
 # resize history to 100x the default (500)
 : "${HISTSIZE:=50000}"
 
-# Flush history to disk after each command.
-export PROMPT_COMMAND="history -a;${PROMPT_COMMAND}"
-
 function top-history() {
 	about 'print the name and count of the most commonly run tools'