deploy.sh

#!/bin/env bash

case $(uname) in
    Darwin)
        echo "This does not work on a Mac. Please use mac_deploy.sh" 1>&2
        exit 1
    ;;
esac

exclude=("README.md" "scripts" "mac_deploy.sh")

dryrun=false

function print_usage () {
    echo "Usage: $0 [-n] TARGET..."
    echo "Create a symbolic link to each TARGET in your home directory."
    echo ""
    echo "  -n:  only print files to be linked without actually doing anything"
    echo ""
    echo "Existing files or or symlinks (to files or directories) will not be"
    echo "touched, but directories will be linked recursively, if the directory"
    echo "already exists in home."
    echo "This script and files starting with an underscore will be ignored."
    echo ""
    echo "In order to deploy all files issue"
    echo "        $0 *"
    echo ""
}

function create_symlink () {
    if [[ -e "$HOME/.$1" ]] ; then
        if [[ -h "$HOME/.$1" ]] ; then
            printf "\033[0;32m"
            echo "$HOME/.$1: symlink exists"
            printf "\033[0m"
        elif [[ -f "$HOME/.$1" ]] ; then
            printf "\033[0;31m"
            echo "$HOME/.$1: file exists"
            printf "\033[0m"
        else
            for arg in "$1"/* ; do
                create_symlink "$arg"
            done
        fi
    else
        printf "\033[1;34m"
        echo "$HOME/.$1 --> $1"
        printf "\033[0m"
        if ! $dryrun ; then
            ln -rs "$1" "$HOME/.$1"
        fi
    fi
}

if [[ $# -le 0 ]] ; then
    print_usage
    exit
fi

if [[ "$1" = "-n" ]] ; then
    dryrun=true
    shift
fi

declare -A exclude_map
for file in "${exclude[@]}" ; do
    exclude_map[$file]=1
done

for arg in "$@" ; do
    if [[ "$arg" != _* && "$0" != *"$arg" && ! ${exclude_map[$arg]} ]]
    then
        if [[ -e "$arg" ]] ; then
            create_symlink "$arg"
        else
            echo "$arg: file not found"
            print_usage
            exit
        fi
    fi
done