[bash] Establece el prompt de acuerdo a la versión de ruby y el status del repositorio de GIT/SVN usado

git_svn_bash_prompt.sh

#!/bin/bash
#
# DESCRIPTION:
#
#   Set the bash prompt according to:
#    * the ruby version
#    * the branch/status of the current git repository
#    * the branch of the current subversion repository
#    * the return value of the previous command
#
# USAGE:
#
#   1. Save this file as ~/.git_svn_bash_prompt
#   2. Add the following line to the end of your ~/.bashrc or ~/.bash_profile:
#        . ~/.git_svn_bash_prompt
#
# AUTHOR:
#   Original work
#   Scott Woods <[email protected]>
#
#   Based on work by halbtuerke and lakiolen.
#
#   http://gist.github.com/657287
#
#   Ruby version added by Edgar Gonzalez <[email protected]>
#   svn status & miscellaneous changes added by William Yanez <[email protected]>

# The various escape codes that we can use to color our prompt.
        RED="\[\033[0;31m\]"
     YELLOW="\[\033[0;33m\]"
      GREEN="\[\033[0;32m\]"
       BLUE="\[\033[0;34m\]"
  LIGHT_RED="\[\033[1;31m\]"
LIGHT_GREEN="\[\033[1;32m\]"
      WHITE="\[\033[1;37m\]"
 LIGHT_GRAY="\[\033[0;37m\]"
 COLOR_NONE="\[\e[0m\]"

# Detect whether the current directory is a git repository.
function is_git_repository {
  git branch > /dev/null 2>&1
}

# Determine the branch/state information for this git repository.
function set_git_branch {
  CLEAN="working directory clean"
  CLEAN1="nada que hacer"
  STAGGED="Cambios para hacer commit"
  STAGGED1="Changes to be committed"
  DIRTY="Archivos sin seguimiento"
  DIRTY1="Cambios no preparados para el commit"

  # Capture the output of the "git status" command.
  git_status="$(git status 2> /dev/null)"

  # Set color based on clean/staged/dirty.
  if [[ ${git_status} =~ $CLEAN  ||  ${git_status} =~ $CLEAN1 ]]; then
    state="${LIGHT_GREEN}"
  elif [[ ${git_status} =~ $DIRTY  || ${git_status} =~ $DIRTY1 ]]; then
    state="${RED}"
  elif [[ ${git_status} =~ $STAGGED || ${git_status} =~ $STAGGED1 ]]; then
    state="${YELLOW}"
  else #dirty
    state="${RED}"
  fi

  # Set arrow icon based on status against remote.
  #remote_pattern="# Your branch is (.*) of"
  remote_pattern="# Su rama está (.*) de (.*) para ([0-9]+) commits."
  remote_pattern_eng="# Your branch is (.*) of (.*) by ([0-9]+) commits."

  if [[ ${git_status} =~ ${remote_pattern} || ${git_status} =~ ${remote_pattern_eng} ]]; then
    if [[ ${BASH_REMATCH[1]} == "detras" || ${BASH_REMATCH[1]} == "behind" ]]; then
      remote="${BASH_REMATCH[3]}↓"
    else
      remote="${BASH_REMATCH[3]}↑"
    fi
  else
    remote=""
  fi

  diverge_pattern="# Tu rama y (.*) have diverged"
  if [[ ${git_status} =~ ${diverge_pattern} ]]; then
    remote="↕"
  fi

  # Get the name of the branch.
  branch_pattern="^# En la rama ([^${IFS}]*)"
  if [[ ${git_status} =~ ${branch_pattern} ]]; then
    branch=${BASH_REMATCH[1]}
  else
    branch_pattern="^# On branch ([^${IFS}]*)"
    if [[ ${git_status} =~ ${branch_pattern} ]]; then
      branch=${BASH_REMATCH[1]}
    fi
  fi

  # Set the final branch string.
  BRANCH="${state}(${branch})${remote}${COLOR_NONE} "
  #echo "BRANCH $BRANCH"
}


# Return the prompt symbol to use, colorized based on the return value of the
# previous command.
function set_prompt_symbol () {
  if test $1 -eq 0 ; then
      PROMPT_SYMBOL="\$"
  else
      PROMPT_SYMBOL="${RED}\$${COLOR_NONE}"
  fi
}

function parse_ruby_version {
  ruby -v | cut -d" " -f2
}

# Set the full bash prompt.
function set_bash_prompt () {
  # Set the PROMPT_SYMBOL variable. We do this first so we don't lose the
  # return value of the last command.
  set_prompt_symbol $?

  # Set the BRANCH variable.
  if is_git_repository ; then
    set_git_branch
  else
    BRANCH=''
  fi

  # Set the bash prompt variable.
  #PS1="\u@\h \w ($(parse_ruby_version))${BRANCH}${PROMPT_SYMBOL} " 
  PS1="${GREEN}\u@\h ${YELLOW}\w ${COLOR_NONE}${BRANCH}\n${PROMPT_SYMBOL} " 
}

# Tell bash to execute this function just before displaying its prompt.
export PROMPT_COMMAND=set_bash_prompt