Bash Prompt Config File

.bash_prompt.sh

# ~/.bash_prompt
# vi: ft=sh
# Austin Beam

# Include the bash_colors if it's installed
[ -f ~/.bash_colors ] && . ~/.bash_colors
# Include the git_aware functionality if it's installed
[ -f ~/.bash_git_aware ] && . ~/.bash_git_aware
# Include the cc_aware (ClearCase) functionality if it's installed
[ -f ~/.bash_cc_aware ] && . ~/.bash_cc_aware

# Configure the colors to be used in the prompt
_time_c="${PURPLE_FG}"
_load_c="${PURPLE_FG}"
_es_c="${COLOR_BOLD}${RED_FG}"
_exectime_c="${LIGHT_BLUE_FG}"
_user_c="${COLOR_RESET_BOLD}${BLUE_FG}"
_host_c="${GREEN_FG}"
_work_c="${CYAN_FG}"
_git_fast_c="${COLOR_BOLD}${BLUE_FG}"
_git_branch_c="${COLOR_BOLD}${GREEN_FG}"
_git_untracked_c="${COLOR_RESET_BOLD}${RED_FG}"
_p_number_c="${RED_FG}"
_p_user_c="${RED_FG}"
_reset_c="${COLOR_RESET}"

# These colors will be used with 'echo' so they need the escapes removed from 
# beginning and end
if [ "${BASH_VERSINFO[0]}" -ge "4" -a \
  \( "${BASH_VERSINFO[1]}" -ge "2" -o "${BASH_VERSINFO[0]}" -gt "4" \) ]; then
  _exec_c="${LIGHT_BLUE_FG:2: -2}"
  _exec_reset_c="${COLOR_RESET:2: -2}"
else
  # Need to set these manually if the bash version is < 4.2. 4.2 introduced the 
  # concept of negative-indexed substrings as used above
  _exec_c="\033[94m"
  _exec_reset_c="\033[0m"
fi

# Check the exit status of the previous command
check_es() { es=$?; [ $es -ne 0 ] && _esout=" | ${es}" || unset _esout; }

# Get previous command execution time (wall time)
get_exectime()
{
  if [ ! -z "$cmd_start_time" ]; then
    local exectime=$(($(date +%s%N | cut -b1-13) - $cmd_start_time))
    if [ "$last_exectime" == "$cmd_start_time" ]; then
      unset _exectime
    else
      # Split the exec time into centiseconds, seconds, minutes, and hours
      local csecs=$(printf "%02d" $((($exectime/10) % 100)))
      local secs=$(printf "%02d" $((($exectime/1000) % 60)))
      local mins=$(printf "%02d" $(($exectime/(1000*60) % 60)))
      local hours=$(printf "%02d" $(($exectime/(1000*60*60) % 24)))
      if [ "$secs" -eq "00" -a "$mins" -eq "00" -a "$hours" -eq "00" ]; then
        _exectime=" | 0.${csecs}"
      elif [ "$mins" -eq "00" -a "$hours" -eq "00" ]; then
        _exectime=" | 0:${secs}.${csecs}"
      elif [ "$hours" -eq "00" ]; then
        _exectime=" | 0:${mins}:${secs}.${csecs}"
      else
        _exectime=" | ${hours}:${mins}:${secs}.${csecs}"
      fi
      last_exectime=$cmd_start_time
    fi
  fi
}

# Function to execute before prompt commands - print the command and save its 
# start time. This is nice because it expands aliases and lets us know exactly 
# what's being executed at any given time
pre_exec()
{
  if [ "$BASH_COMMAND" != "trap - DEBUG" -a \
       "$BASH_COMMAND" != "check_es" ]; then
    # Echo each command prior to execution
    echo -e "${_exec_c}$BASH_COMMAND${_exec_reset_c}"
    # Save the command start time in milliseconds
    cmd_start_time="$(date +%s%N | cut -b1-13)"
    #cmd_start_time="${_time_c}$(date +%H:%M:%S).$(date +%N | cut -b1-2)"
  fi
}

# Save the string (note: we don't want to execute this here, hence the '\$') for 
# gathering the system load
_load=" | \$(cat /proc/loadavg | cut -d' ' -f 1,2,3 | tr -d "\n")"

# Set variables we'll use in the prompt
_w_title='\[\033]0;\u@\h: \w\007\]'

# Function to build our prompt
prompt-build()
{
  local prompt_command=""
  local ps1=""

# Commands before PS1 definition
  [ -z "$_P_ES" ] \
    || prompt_command="check_es;"
  # Always clear the DEBUG trap (or else it could get left on when we don't want 
  # it to be left on
  prompt_command="${prompt_command} trap - DEBUG;"
  [ -z "$_P_TIMER" ] \
    || prompt_command="${prompt_command} get_exectime;"
  if [ ! -z "$_P_GITFULL" ]; then
    prompt_command="${prompt_command} find_git_branch; git_dirty;"
  elif [ ! -z "$_P_GITFAST" ]; then
    prompt_command="${prompt_command} find_git_branch; quick_git_dirty;"
  elif [ ! -z "$_P_GITFASTER" ]; then
    prompt_command="${prompt_command} find_git_branch;"
  fi
  if [ ! -z "$_P_CLEARCASE" ]; then
    prompt_command="${prompt_command} clearcase_view;"
  fi

# PS1 definition
# Line 1
# Window title
# Add a hacky fix for Ubuntu virtual terminals, which don't properly handle the
# window title escape sequence. Make sure the virtual terminal is greater than
# or equal to 7.
  if [ ! -z "$XDG_VTNR" ]; then
    if [ $XDG_VTNR -ge 7 ]; then
      [ -z "$_P_TITLE"   ] || ps1="${ps1}${_w_title}${reset_c}"
    fi
  fi
# Time
  [ -z "$_P_COLOR"   ] || ps1="${ps1}${_time_c}"
  [ -z "$_P_TIME"    ] || ps1="${ps1}\t"
  [ -z "$_P_COLOR"   ] || ps1="${ps1}${_reset_c}"
# Load
  [ -z "$_P_COLOR"   ] || ps1="${ps1}${_load_c}"
  [ -z "$_P_LOAD"    ] || ps1="${ps1}\${_load}"
  [ -z "$_P_COLOR"   ] || ps1="${ps1}${_reset_c}"
# Execution timer
  [ -z "$_P_COLOR"   ] || ps1="${ps1}${_exectime_c}"
  [ -z "$_P_TIMER"   ] || ps1="${ps1}\${_exectime}"
  [ -z "$_P_COLOR"   ] || ps1="${ps1}${_reset_c}"
# Exit status
  [ -z "$_P_COLOR"   ] || ps1="${ps1}${_es_c}"
  [ -z "$_P_ES"      ] || ps1="${ps1}\${_esout}"
  [ -z "$_P_COLOR"   ] || ps1="${ps1}${_reset_c}"

# New line if this is at least 3-line prompt
  [ "$_P_LINES" -ge "3" ] && ps1="${ps1}\n"

# Line 2
# Username
  [ -z "$_P_COLOR"   ] || ps1="${ps1}${_user_c}"
  [ -z "$_P_USER"    ] || ps1="${ps1}\u"
  [ -z "$_P_COLOR"   ] || ps1="${ps1}${_reset_c}"
# Hostname
  [ -z "$_P_COLOR"   ] || ps1="${ps1}${_host_c}"
  [ -z "$_P_HOST"    ] || ps1="${ps1}@\h"
  [ -z "$_P_COLOR"   ] || ps1="${ps1}${_reset_c}"
# Working directory
  [ -z "$_P_COLOR"   ] || ps1="${ps1}${_work_c}"
  [ -z "$_P_WORK"    ] || ps1="${ps1} \w"
  [ -z "$_P_COLOR"   ] || ps1="${ps1}${_reset_c}"
# Git prompt support
  # Only turn on the branch coloring if prompt color is enabled and either 
  # gitfull or gitfast is enabled (git_dirty_color overrides git_branch_c if 
  # the repository is dirty)
  [ -z "$_P_COLOR" -o \( -z "$_P_GITFULL" -a -z "$_P_GITFAST" \) ] \
                       || ps1="${ps1}${_git_branch_c}\${git_dirty_color}"
  [ -z "$_P_GITFULL" -a -z "$_P_GITFAST" -a -z "$_P_GITFASTER" ] \
                       || ps1="${ps1}\${git_branch}"
  [ -z "$_P_GITFULL" -a -z "$_P_GITFAST" ] \
                       || ps1="${ps1}\${git_dirty}"
  [ -z "$_P_COLOR"   ] || ps1="${ps1}${_reset_c}"
  # Only turn on the git_untracked_color if prompt color is enabled and either 
  # gitfull or gitfast is enabled
  [ -z "$_P_COLOR" -o \( -z "$_P_GITFULL" -a -z "$_P_GITFAST" \) ] \
                       || ps1="${ps1}${_git_untracked_c}"
  [ -z "$_P_GITFULL" ] || ps1="${ps1} \${git_untracked}"
  [ -z "$_P_GITFAST" ] || ps1="${ps1} |"
  [ -z "$_P_COLOR"   ] || ps1="${ps1}${_reset_c}"

# Clearcase prompt support
  [ -z "$_P_COLOR" -o -z "$_P_CLEARCASE" ] \
                       || ps1="${ps1}\${_cc_c}"
  [ -z "$_P_CLEARCASE" ] \
                       || ps1="${ps1}\${_cc_root}"
  [ -z "$_P_COLOR"   ] || ps1="${ps1}${_reset_c}"

# New line if this is at least a 2-line prompt
  [ "$_P_LINES" -ge "2" ] && ps1="${ps1}\n"

# Line 3
# Prompt number
  [ -z "$_P_COLOR"   ] || ps1="${ps1}${_p_number_c}"
  [ -z "$_P_NUMBER"  ] || ps1="${ps1}\#"
  [ -z "$_P_COLOR"   ] || ps1="${ps1}${_reset_c}"
# User type
  [ -z "$_P_COLOR"   ] || ps1="${ps1}${_p_user_c}"
  [ -z "$_P_USRTYP"  ] || ps1="${ps1}\$"
  [ -z "$_P_COLOR"   ] || ps1="${ps1}${_reset_c}"

# Space before prompt text (i.e. '$ ')
  [ -z "$_P_SPACE"   ] || ps1="${ps1} "

# Add PS1 to the prompt command
  prompt_command="${prompt_command} export PS1=\"$ps1\";"

# Commands after PS1 definition
  [ -z "$_P_TIMER" ] \
    || prompt_command="${prompt_command} trap 'pre_exec' DEBUG;"

  export PROMPT_COMMAND="${prompt_command}"
}

# Reset all prompt features
prompt-reset()
{
  _P_LINES=1
  unset _P_COLOR \
        _P_TITLE \
        _P_TIME _P_LOAD _P_TIMER _P_ES \
        _P_USER _P_HOST _P_WORK _P_GITFULL _P_GITFAST _P_GITFASTER \
        _P_NUMBER _P_USRTYP _P_SPACE
}

# Full git prompt support (slowest, but provides the repo status and untracked 
# file count)
prompt-full()
{
  prompt-reset
  _P_LINES=3
  _P_COLOR=true;  _P_TITLE=true;
  _P_TIME=true;   _P_LOAD=true;   _P_TIMER=true;  _P_ES=true
  _P_USER=true;   _P_HOST=true;   _P_WORK=true;   _P_GITFULL=true; _P_CLEARCASE=true
  _P_NUMBER=true; _P_USRTYP=true; _P_SPACE=true
  prompt-build
}

# Fast git prompt support (doesn't show untracked file count)
prompt-fast()
{
  prompt-reset
  _P_LINES=3
  _P_COLOR=true;  _P_TITLE=true;
  _P_TIME=true;   _P_LOAD=true;   _P_TIMER=true;  _P_ES=true
  _P_USER=true;   _P_HOST=true;   _P_WORK=true;   _P_GITFAST=true; _P_CLEARCASE=true
  _P_NUMBER=true; _P_USRTYP=true; _P_SPACE=true
  prompt-build
}

# Faster git prompt support (only shows branch name, no status or untracked file 
# count)
prompt-faster()
{
  prompt-reset
  _P_LINES=3
  _P_COLOR=true;  _P_TITLE=true;
  _P_TIME=true;   _P_LOAD=true;   _P_TIMER=true;  _P_ES=true
  _P_USER=true;   _P_HOST=true;   _P_WORK=true;   _P_GITFASTER=true; _P_CLEARCASE=true
  _P_NUMBER=true; _P_USRTYP=true; _P_SPACE=true;
  prompt-build
}

# Disable git prompt support totally (fastest)
prompt-git-off()
{
  unset _P_GITFULL _P_GITFAST _P_GITFASTER
  prompt-build
}

prompt-color-off()
{
  unset _P_COLOR
  prompt-build
}

prompt-features()
{
  [ -z "$_P_LINES"     ] || echo -n "Lines: $_P_LINES "
  [ -z "$_P_TITLE"     ] || echo -n "Title "
  [ -z "$_P_COLOR"     ] || echo -n "Color "
  [ -z "$_P_TIME"      ] || echo -n "Time "
  [ -z "$_P_LOAD"      ] || echo -n "Load "
  [ -z "$_P_TIMER"     ] || echo -n "Timer "
  [ -z "$_P_ES"        ] || echo -n "ExitStatus "
  [ -z "$_P_USER"      ] || echo -n "Username "
  [ -z "$_P_HOST"      ] || echo -n "Hostname "
  [ -z "$_P_WORK"      ] || echo -n "WorkingDir "
  [ -z "$_P_GITFULL"   ] || echo -n "GitFull "
  [ -z "$_P_GITFAST"   ] || echo -n "GitFast "
  [ -z "$_P_GITFASTER" ] || echo -n "GitFaster "
  [ -z "$_P_NUMBER"    ] || echo -n "CmdNumber "
  [ -z "$_P_USRTYP"    ] || echo -n "UserType "
  [ -z "$_P_SPACE"     ] || echo -n "Space "
  echo
}

# Define aliases for even more basic prompts when needed
alias prompt-basic="export PROMPT_COMMAND=; export PS1='\t\n\u@\h \w\n\$ '"
alias prompt-min="export PROMPT_COMMAND=; export PS1='\$ '"

# Enable full git support for the prompt by default
prompt-full

Needed to make a revision adding '.sh' as the extension for Gist to display this as a shell-formatted file (doesn't seem to like it when you manually configure the 'language' setting).

Enjoy