$PROMPT_COMMAND Issues

[weissewolke]

I have these lines in my .bashrc:

HISTCONTROL=ignoreboth:erasedups
PROMPT_COMMAND="history -n; history -w; history -c; history -r; $PROMPT_COMMAND"

Is it possible to alter the functions in mcfly.bash to accomodate for this?

[cantino]

Mcfly should leave the PROMPT_COMMAND alone, only appending it's change. What does echo $PROMPT_COMMAND say?

[weissewolke]

The result of echo $PROMPT_COMMAND

__lp_set_prompt

My two lines by themselves erase all duplicates from the history file by reading the list, writing to file, clearing the list and reading the new history file and appending its contents to the history list again. This seems to be necessary since erasedups is quite bugy and does not work reliably.

Activating McFly has two strange effects. Maybe this is of some significance in analysing what is going on:

• if .mcfly.bash is sourced before the lines - the history will be exactly as long as defined in this function

  if [[ ! -f "${MCFLY_HISTORY}" ]]; then
    export MCFLY_HISTORY=$(mktemp -t mcfly.XXXXXXXX)
    tail -n100 "${HISTFILE}" >| ${MCFLY_HISTORY}
  fi

• if sourced after - erasedups does not seem to work

Any tips greatly appreciated.

[cantino]

I'm not sure. You could try putting the result of mcfly init bash into a shell script that you source yourself, then tweak it.