.bashrc

# Load *.bash files in the .bashrc.d directory. Put bash config files there.

export $BASH_D=$HOME/.bashrc.d

if [ -d $BASH_D ]; then
  for conf in $BASH_D/*.bash; do
    . $conf
  done
fi

source $HOME/.profile

.profile

# Loads environment variables from .profile.d directory.
# The filename is the variable name, the file contents is the value

export $PROFILE_D=$HOME/.profile.d

if [ -d $PROFILE_D ]; then
  for conf in `ls $PROFILE_D`; do
    export ${conf}=`cat $PROFILE_D/${conf}`
  done
fi

.zshrc

# Load *.zsh files in the .zshrc.d directory. Put zsh config files there.

export $ZSH_D=$HOME/.zshrc.d

if [ -d $ZSH_D ]; then
  for conf in $ZSH_D/*.zsh; do
    . $conf
  done
fi

source $HOME/.profile