makesymlinks.sh

#!/bin/bash
############################
# .make.sh
# This script creates symlinks from the home directory 
# to any desired dotfiles in ~/dotfiles
############################

########## Variables

dir=~/dotfiles                    # dotfiles directory
olddir=~/dotfiles_old             # old dotfiles backup directory
files="\
    bashrc \
    vimrc \
    vim \
    zshrc \
    scrotwm.conf \
    Xresources\
    " # list of files/folders to symlink in homedir

##########

# create dotfiles_old in homedir
echo "Creating $olddir for backup of any existing dotfiles in ~"
mkdir -p $olddir
echo "...done"

# change to the dotfiles directory
echo "Changing to the $dir directory"
cd $dir
echo "...done"

# move any existing dotfiles in homedir to dotfiles_old directory, 
# then create symlinks from the homedir to any files in the ~/dotfiles directory specified in $files
for file in $files; do
    echo "Moving any existing dotfiles from ~ to $olddir"
    mv ~/.$file ~/dotfiles_old/
    echo "Creating symlink to $file in home directory."
    ln -s $dir/$file ~/.$file
done

function install_zsh {
    # Test to see if zshell is installed.  If it is:
    if [ -f /bin/zsh -o -f /usr/bin/zsh ]; then
        # Clone my oh-my-zsh repository from GitHub only if it isn't already present
        if [[ ! -d $dir/oh-my-zsh/ ]]; then
            git clone http://github.com/michaeljsmalley/oh-my-zsh.git
        fi
        # Set the default shell to zsh if it isn't currently set to zsh
        if [[ ! $(echo $SHELL) == $(which zsh) ]]; then
            chsh -s $(which zsh)
        fi
    else
        # If zsh isn't installed, get the platform of the current machine
        platform=$(uname);
        # If the platform is Linux, try an apt-get to install zsh and then recurse
        # FIXME should be done by determining OS from /etc/issue
        if [[ $platform == 'Linux' ]]; then
            sudo apt-get install zsh
            install_zsh
        # If the platform is OS X, tell the user to install zsh :)
        elif [[ $platform == 'Darwin' ]]; then
            echo "Please install zsh, then re-run this script!"
            exit
        fi
    fi
}

# install_zsh