ps1.sh

# ==============================================================================
# PS1 setup

# Color Variables
BOLD=$(tput bold)
RED=$(tput setaf 1)
GREEN=$(tput setaf 2)
YELLOW=$(tput setaf 3)
BLUE=$(tput setaf 4)
PURPLE=$(tput setaf 5)
CYAN=$(tput setaf 6)
WHITE=$(tput setaf 7)
RESET=$(tput sgr0)

function ps1ify () {
  echo "\[$1\]"
}
PS1_BOLD=$(ps1ify $BOLD)
PS1_RED=$(ps1ify $RED)
PS1_GREEN=$(ps1ify $GREEN)
PS1_BLUE=$(ps1ify $BLUE)
PS1_RESET=$(ps1ify $RESET)

# PS1_USER_HOST="\u@\h"
PS1_DATE="$PS1_GREEN[\t]$PS1_RESET"
PS1_PWD="\w"
# Set term window title
PS1_BASE="\[\e]0;$PS1_PWD\a\]"
#PS1_PRE_COLON=$PS1_BOLD$PS1_GREEN$PS1_USER_HOST$PS1_RESET
PS1_BASE="$PS1_BASE:$PS1_BOLD$PS1_BLUE$PS1_PWD$PS1_RESET\$ "

# Elapsed time of last command
function timer_start {
    timer=${timer:-$SECONDS}
}
function timer_stop {
    timer_show=$(($SECONDS - $timer))
    unset timer
}
function convertsecs() {
    m=$((($1/60)))
    s=$(($1%60))
    if [[ $m -lt 1 ]]; then
      printf "%ds" $s
    else
      printf "%dm%ds" $m $s
    fi
}

trap 'timer_start' DEBUG

# Add an indicator of an error code to the PS1
function error_code() {
  if [[ $1 != 0 ]]; then
    echo -n "$PS1_BOLD$PS1_RED<$1>$PS1_RESET "
  fi
}

function finalize_ps1() {
  status=$?
  timer_stop
  PS1="$PS1_DATE$PS1_BASE"
  # Add elapsed time and error code
  if [[ $timer_show -lt 1 ]]; then
    PS1="$(error_code $status)$PS1"
  else
    PS1="$(error_code $status)$PS1_BLUE[$(convertsecs $timer_show)]$PS1_RESET$PS1"
  fi
}

# Truncates beginning of path with '...' showing last N dir levels
export PROMPT_DIRTRIM=4

PROMPT_COMMAND=finalize_ps1

# ==============================================================================