Functions for use by https://gist.github.com/1283703

bootstrap_functions.sh

function package_installed {
    name=$1
    if `rpm -q $name 1>/dev/null`; then
	return 0
    else
	return 1
    fi
}


function install_package {
    if `yum install --quiet -y $1 1>/dev/null`; then
	return 0
    else
	return 1
    fi
}

function ensure_package_installed {
    if ! package_installed $1 ; then
	echo "Installing ${1}"
	install_package $1
    fi
}

function ensure_packages_installed {
    for package in $1; do
	ensure_package_installed $package
    done
}

function user_present {
    if `grep -q "^$1:" /etc/passwd`; then
	return 0
    else
	return 1
    fi
}

function ensure_user_present {
    if ! user_present $1; then
	echo "Adding user $1"
	DIR=/var/empty/$1
	useradd -d $DIR $1
	chown root:root $DIR
	chmod 711 $DIR
    fi
}

function ensure_directory {
    if ! [ -d $1 ]; then
	mkdir /etc/puppet
    fi
}

function ensure_file {
    path=$1
    source=$2

    if ! [ -f $path ]; then
	cp $source $path && \
	    return 0
    elif ! diff -q $source $path; then
	return 0
    fi
}

function ensure_yum_repo {
    reponame=$1
    yumrepos="/etc/yum.repos.d"
    if ! [ -f $yumrepos/$reponame ]; then
	cp $reponame $yumrepos/
	return 0
    elif ! diff -q $reponame $yumrepos/$reponame; then
	return 0
    fi
}

function ensure_vhost_present {
    vhost=$1
    vhosts="/etc/httpd/conf.d"
    if ! [ -f $vhosts/$vhost ]; then
        cp $vhost $vhosts/
        return 0
    elif ! diff -q $vhost $vhosts/$vhost; then
        return 0
    fi
}

function exec_puppet_apply {
    manifest=$1
    puppet apply $manifest
}