makesymlinks.sh

#!/bin/bash
########################
# .make.sh
# This script creates symlinks from the home directory to any desired
# dotfiles in ~/dotfiles
# Borrowed from michaeljsmally: https://github.com/michaeljsmalley/dotfiles/blob/master/makesymlinks.sh
########################

######### Variables

dir=~/dotfiles
olddir=~/dotfiles_old
files="bashrc vimrc vim zshrc oh-my-zsh tmux.conf"

##########

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

# change to the dotfiles directory
echo -n "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
for file in $files; do
    echo "Moving any existing dotfiles from ~ to $olddir"
    mv ~/.$file $olddir
    echo "Creating symlink to $file in home directory"
    ln -s $dir/$file ~/.$file
done

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/robbyrussel/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 $(which zsh)
    fi
else
    # If zsh isn't already installed, get the platform of the current machine
    platform=$(uname);
    # If the platform is Linux, try an apt-get to install zsh and then recurse
    if [[ $platform == 'Linux' ]]; then
        if [[ -f /etc/redhat-release ]]; then
            sudo yum install zsh
            install_zsh
        fi
        if [[ -f /etc/debian_version ]]; then
            sudo apt-get install zsh
            install_zsh
        fi
    # 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