Make adding paths to $PATH and exporting environment variables easy

.bashrc

# Add all paths listed in ~/.path to the PATH variable
# ----------------------------------------------------------
# first check if the file is available
if [ -f $HOME/.path ]; then
  # read file line-by-line
  for p in $(cat $HOME/.path); do
    # check if line is a comment
    if ! echo $p | grep -q ^[[:space:]]*\#; then
      # check if the directory exists
      if [ -d "$HOME/$p" ]; then 
        # finally add it to the PATH environent variable
        PATH=$HOME/$p:$PATH
      fi
    fi
  done
fi

# Export all declared environment variables listed in ~/.env
# check with 'env' so see what is exported
# ----------------------------------------------------------
# first check if the file is available
if [ -f $HOME/.env ]; then
  # read file line-by-line
  for e in $(cat $HOME/.env); do
    # check if line is a comment
    if ! echo $p | grep -q ^[[:space:]]*\#; then
      export $e
    fi
  done
fi

# Load RVM into a shell session *as a function*
[[ -s "$HOME/.rvm/scripts/rvm" ]] && source "$HOME/.rvm/scripts/rvm"