title: Bash command prompt with virtualenv and git branch
body: <p>I previously had my bash command prompt displaying the last two directories of my present working directory and my git branch if I am inside of a git repo. I starting adding some projects inside virtual environments and when I was working on those, my command prompt settings stopped working.</p>
  
  <p>I've managed to get the virtualenv and my current directory displayed, but I'm still not able to get my git branching to work.</p>
  
  <p>Currently I'm getting this:
  [name_of_virtualenv if in one] ~/current/directory () $</p>
  
  <p>How can I get my command prompt to display like this
  [name_of_virtualenv if in one] ~/current/directory [master] $</p>
  
  <p>bashrc file:</p>
  
  <pre><code># external settings
  # for path in /etc/bashrc /etc/bash.bashrc /etc/bash/bashrc; do
  #     [[ -f "$path" ]] &amp;&amp; . "$path"
  # done
  
  # load rvm function
  [[ -s "$HOME/.rvm/scripts/rvm" ]] &amp;&amp; . "$HOME/.rvm/scripts/rvm"
  
  # source brew
  if [ -f $(brew --prefix)/etc/bash_completion ]; then
    . $(brew --prefix)/etc/bash_completion
  fi
  
  # history storage settings
  export HISTCONTROL=ignoredups
  export HISTSIZE=1000000
  export HISTFILESIZE=1000000
  export EDITOR='vim'
  
  SEND_256_COLORS_TO_REMOTE=1
  
  # bash_prompt
  # The various escape codes that we can use to color our prompt.
          RED="\[\033[0;31m\]"
       YELLOW="\[\033[1;33m\]"
        GREEN="\[\033[0;32m\]"
         BLUE="\[\033[1;34m\]"
    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 &gt; /dev/null 2&gt;&amp;1
   }
  
   # Determine the branch/state information for this git repository.
   function set_git_branch {
     # Capture the output of the "git status" command.
     git_status="$(git status 2&gt; /dev/null)"
  
     # Set color based on clean/staged/dirty.
     if [[ ${git_status} =~ "working directory clean" ]]; then
       state="${GREEN}"
     elif [[ ${git_status} =~ "Changes to be committed" ]]; then
       state="${YELLOW}"
     else
       state="${LIGHT_RED}"
     fi
  
     # Set arrow icon based on status against remote.
     remote_pattern="# Your branch is (.*) of"
     if [[ ${git_status} =~ ${remote_pattern} ]]; then
       if [[ ${BASH_REMATCH[1]} == "ahead" ]]; then
         remote="↑"
       else
         remote="↓"
       fi
     else
       remote=""
     fi
     diverge_pattern="# Your branch and (.*) have diverged"
     if [[ ${git_status} =~ ${diverge_pattern} ]]; then
       remote="↕"
     fi
  
     # Get the name of the branch.
     branch_pattern="^# On branch ([^${IFS}]*)"
     if [[ ${git_status} =~ ${branch_pattern} ]]; then
       branch=${BASH_REMATCH[1]}
     fi
  
     # Set the final branch string.
     BRANCH="${state}(${branch})${remote}${COLOR_NONE} "
   }
  
   # Return the prompt symbol to use, colorized based on the return value of the
   # previous command.
   function set_prompt_symbol () {
     if test $1 -eq 0 ; then
         PROMPT_SYMBOL="\$"
     else
         PROMPT_SYMBOL="${LIGHT_RED}\$${COLOR_NONE}"
     fi
   }
  
   # Determine active Python virtualenv details.
   function set_virtualenv () {
     if test -z "$VIRTUAL_ENV" ; then
         PYTHON_VIRTUALENV=""
     else
         PYTHON_VIRTUALENV="${BLUE}[`basename \"$VIRTUAL_ENV\"`]${COLOR_NONE} "
     fi
   }
  
   # 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 PYTHON_VIRTUALENV variable.
     set_virtualenv
  
     # Set the BRANCH variable.
     if is_git_repository ; then
       set_git_branch
     else
       BRANCH=''
     fi
  
     # Set the bash prompt variable.
     PS1="${PYTHON_VIRTUALENV}${YELLOW}\w${COLOR_NONE} ${BRANCH}${PROMPT_SYMBOL} "
   }
  
   # Tell bash to execute this function just before displaying its prompt.
   PROMPT_COMMAND=set_bash_prompt
  
  pwdtail () { #returns the last 2 fields of the working directory
      pwd|awk -F/ '{nlast = NF -1;print $nlast"/"$NF}'
  }
  
  export PATH=/usr/local/bin:/usr/local/share/npm/bin:~/bin:$PATH
  export LS_COLORS='no=00:fi=00:di=01;34:ln=01;36:pi=40;33:so=01;35:do=01;35:bd=40;33;01:cd=40;33;01:or=40;31;01:ex=01;32:*.tar=01;31:*.tgz=01;31:*.arj=01;31:*.taz=01;31:*.lzh=01;31:*.zip=01;31:*.z=01;31:*.Z=01;31:*.gz=01;31:*.bz2=01;31:*.deb=01;31:*.rpm=01;31:*.jar=01;31:*.jpg=01;35:*.jpeg=01;35:*.gif=01;35:*.bmp=01;35:*.pbm=01;35:*.pgm=01;35:*.ppm=01;35:*.tga=01;35:*.xbm=01;35:*.xpm=01;35:*.tif=01;35:*.tiff=01;35:*.png=01;35:*.mov=01;35:*.mpg=01;35:*.mpeg=01;35:*.avi=01;35:*.fli=01;35:*.gl=01;35:*.dl=01;35:*.xcf=01;35:*.xwd=01;35:*.ogg=01;35:*.mp3=01;35:*.wav=01;35:'
  export EDITOR='vim'
  
  PATH=$PATH:$HOME/.rvm/bin # Add RVM to PATH for scripting
  
  export WORKON_HOME=$HOME/.envs
  source /usr/local/bin/virtualenvwrapper.sh
  </code></pre>