export MAX_PATH_LENGTH=25
export PROMPT_COMMAND='PS1="\[\033[0;33m\][\!]\`if [[ \$? = "0" ]]; then echo "\\[\\033[32m\\]"; else echo "\\[\\033[31m\\]"; fi\`[\u.\h: \`if [[ `pwd|wc -c|tr -d " "` > $MAX_PATH_LENGTH ]]; then echo "\\W"; else echo "\\w"; fi\`]\$\[\033[0m\] "; echo -ne "\033]0;`hostname -s`:`pwd`\007"'

http://blog.ubrio.us/osx/best-bash-prompt/

A very dynamic and flexible bash prompt. Personally I find this to have everything needed. It shows exit status, shortens itself for long directories, and shows bash history for easy referencing.

Hopefully it doesn't get messed up.

Dynamic BASH Prompt

Bash, osx

Bash