Single line dynamic chef cookbook installer

chef installer

#!/bin/bash

DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
APPLICATION="${0##*/}"
USAGE="Cookbook installer
usage: $APPLICATION -c cookbooks

Ensures chef as a dependency and installs cookbooks specified with -c. 

THIS MUST BE RUN AS ROOT. This script only works with Redhat Enterprise Linux 5 or Mac OSX.

Options:
	-a 		Install all the cookbooks.
	-c COOKBOOKS 	Comma-separated list of cookbook targets to install.
			Specify 'help' or 'list' to print out potential targets.
        -o OVERRIDE     JSON object of overriding attributes.
"

error() {
    local ecode="$1"
    shift
    echo "$*" 1>&2
    exit "$ecode"
}

# confirm sudo or root
if [[ $UID != 0 ]]; then
    error 2 "$USAGE"
fi

while getopts 'ac:o:' f; do
	case "$f" in
		a) ALL='y';;
		c) COOKBOOKS="$COOKBOOKS${COOKBOOKS:+","}$OPTARG";;
        o) OVERRIDES="$OPTARG";;
		\?) error 2 "$USAGE";;
	esac
done

# throw error if no arguments are passed
if [ -z "$ALL" -a -z "$COOKBOOKS" ]; then
    error 2 "$USAGE"
fi

# Confirm or list target cookbooks if requested
if [ -z "$ALL" -a -n "$COOKBOOKS" ]; then
    c="${COOKBOOKS%,},"
    while [ -n "$c" ]; do
        COOKBOOK="${c%%,*}"
        c="${c#*,}"
        if [ -z "$COOKBOOK" ]; then
            continue
        elif [ "$COOKBOOK" = 'help' -o "$COOKBOOK" = 'list' ]; then
            COOKBOOKS='help'
            echo "Available cookbooks:" 1>&2
            for c in "$DIR/cookbooks/"*; do
                COOKBOOK="${c##*/}"
                echo $COOKBOOK
            done
            exit 2
        elif [ ! -r "$DIR/cookbooks/$COOKBOOK" ] || \
             ! (COOKBOOKS='check'; echo "$DIR/cookbooks/$COOKBOOK"); then
            error 2 "Invalid cookbook \"$COOKBOOK\"."
        fi
    done

    # Create custom json
    c="${COOKBOOKS%,},"
    JSON="{\"run_list\": ["
	while [ -n "$c" ]; do
		COOKBOOK="${c%%,*}"
		c="${c#*,}"
		JSON="${JSON%}\"recipe[$COOKBOOK]\","
	done
	JSON="${JSON%,}]}"
	echo "$JSON" >> $DIR/temp.json
fi

if [ -z "$ALL" -a -n "$COOKBOOKS" -a -n "$OVERRIDES" ]; then
    sed -i'' -e '$s/}/,'"$OVERRIDES"'}/' $DIR/temp.json
fi

chef_binary=/opt/chef/bin/chef-solo

if ! test -f "$chef_binary"; then
    if [[ `uname` == 'Linux' ]]; then
        rpm -ivh $DIR/payload/chef-11.4.4-2.el5.x86_64.rpm
    elif [[ `uname` == 'Darwin' ]]; then
        curl -L https://www.opscode.com/chef/install.sh | sudo bash
    fi
fi &&

if [ -n "$ALL" ]; then
	"$chef_binary" -c "$DIR"/solo.rb -j "$DIR"/solo.json
elif [ -n "$COOKBOOKS" ]; then
	"$chef_binary" -c "$DIR"/solo.rb -j "$DIR"/temp.json
	rm -rf $DIR/temp.json
fi