| # functions - Common functions used by DevStack components | 
 | # | 
 | # The following variables are assumed to be defined by certain functions: | 
 | # ``ENABLED_SERVICES`` | 
 | # ``EROR_ON_CLONE`` | 
 | # ``FILES`` | 
 | # ``GLANCE_HOSTPORT`` | 
 | # ``OFFLINE`` | 
 | # ``PIP_DOWNLOAD_CACHE`` | 
 | # ``PIP_USE_MIRRORS`` | 
 | # ``RECLONE`` | 
 | # ``TRACK_DEPENDS`` | 
 | # ``http_proxy``, ``https_proxy``, ``no_proxy`` | 
 |  | 
 |  | 
 | # Save trace setting | 
 | XTRACE=$(set +o | grep xtrace) | 
 | set +o xtrace | 
 |  | 
 |  | 
 | # Convert CIDR notation to a IPv4 netmask | 
 | # cidr2netmask cidr-bits | 
 | function cidr2netmask() { | 
 |     local maskpat="255 255 255 255" | 
 |     local maskdgt="254 252 248 240 224 192 128" | 
 |     set -- ${maskpat:0:$(( ($1 / 8) * 4 ))}${maskdgt:$(( (7 - ($1 % 8)) * 4 )):3} | 
 |     echo ${1-0}.${2-0}.${3-0}.${4-0} | 
 | } | 
 |  | 
 |  | 
 | # Return the network portion of the given IP address using netmask | 
 | # netmask is in the traditional dotted-quad format | 
 | # maskip ip-address netmask | 
 | function maskip() { | 
 |     local ip=$1 | 
 |     local mask=$2 | 
 |     local l="${ip%.*}"; local r="${ip#*.}"; local n="${mask%.*}"; local m="${mask#*.}" | 
 |     local subnet=$((${ip%%.*}&${mask%%.*})).$((${r%%.*}&${m%%.*})).$((${l##*.}&${n##*.})).$((${ip##*.}&${mask##*.})) | 
 |     echo $subnet | 
 | } | 
 |  | 
 |  | 
 | # Exit 0 if address is in network or 1 if address is not in network | 
 | # ip-range is in CIDR notation: 1.2.3.4/20 | 
 | # address_in_net ip-address ip-range | 
 | function address_in_net() { | 
 |     local ip=$1 | 
 |     local range=$2 | 
 |     local masklen=${range#*/} | 
 |     local network=$(maskip ${range%/*} $(cidr2netmask $masklen)) | 
 |     local subnet=$(maskip $ip $(cidr2netmask $masklen)) | 
 |     [[ $network == $subnet ]] | 
 | } | 
 |  | 
 |  | 
 | # Wrapper for ``apt-get`` to set cache and proxy environment variables | 
 | # Uses globals ``OFFLINE``, ``*_proxy` | 
 | # apt_get operation package [package ...] | 
 | function apt_get() { | 
 |     [[ "$OFFLINE" = "True" || -z "$@" ]] && return | 
 |     local sudo="sudo" | 
 |     [[ "$(id -u)" = "0" ]] && sudo="env" | 
 |     $sudo DEBIAN_FRONTEND=noninteractive \ | 
 |         http_proxy=$http_proxy https_proxy=$https_proxy \ | 
 |         no_proxy=$no_proxy \ | 
 |         apt-get --option "Dpkg::Options::=--force-confold" --assume-yes "$@" | 
 | } | 
 |  | 
 |  | 
 | # Gracefully cp only if source file/dir exists | 
 | # cp_it source destination | 
 | function cp_it { | 
 |     if [ -e $1 ] || [ -d $1 ]; then | 
 |         cp -pRL $1 $2 | 
 |     fi | 
 | } | 
 |  | 
 |  | 
 | # Prints backtrace info | 
 | # filename:lineno:function | 
 | function backtrace { | 
 |     local level=$1 | 
 |     local deep=$((${#BASH_SOURCE[@]} - 1)) | 
 |     echo "[Call Trace]" | 
 |     while [ $level -le $deep ]; do | 
 |         echo "${BASH_SOURCE[$deep]}:${BASH_LINENO[$deep-1]}:${FUNCNAME[$deep-1]}" | 
 |         deep=$((deep - 1)) | 
 |     done | 
 | } | 
 |  | 
 |  | 
 | # Prints line number and "message" then exits | 
 | # die $LINENO "message" | 
 | function die() { | 
 |     local exitcode=$? | 
 |     set +o xtrace | 
 |     local line=$1; shift | 
 |     if [ $exitcode == 0 ]; then | 
 |         exitcode=1 | 
 |     fi | 
 |     backtrace 2 | 
 |     err $line "$*" | 
 |     exit $exitcode | 
 | } | 
 |  | 
 |  | 
 | # Checks an environment variable is not set or has length 0 OR if the | 
 | # exit code is non-zero and prints "message" and exits | 
 | # NOTE: env-var is the variable name without a '$' | 
 | # die_if_not_set $LINENO env-var "message" | 
 | function die_if_not_set() { | 
 |     local exitcode=$? | 
 |     FXTRACE=$(set +o | grep xtrace) | 
 |     set +o xtrace | 
 |     local line=$1; shift | 
 |     local evar=$1; shift | 
 |     if ! is_set $evar || [ $exitcode != 0 ]; then | 
 |         die $line "$*" | 
 |     fi | 
 |     $FXTRACE | 
 | } | 
 |  | 
 |  | 
 | # Prints line number and "message" in error format | 
 | # err $LINENO "message" | 
 | function err() { | 
 |     local exitcode=$? | 
 |     errXTRACE=$(set +o | grep xtrace) | 
 |     set +o xtrace | 
 |     local msg="[ERROR] ${BASH_SOURCE[2]}:$1 $2" | 
 |     echo $msg 1>&2; | 
 |     if [[ -n ${SCREEN_LOGDIR} ]]; then | 
 |         echo $msg >> "${SCREEN_LOGDIR}/error.log" | 
 |     fi | 
 |     $errXTRACE | 
 |     return $exitcode | 
 | } | 
 |  | 
 |  | 
 | # Checks an environment variable is not set or has length 0 OR if the | 
 | # exit code is non-zero and prints "message" | 
 | # NOTE: env-var is the variable name without a '$' | 
 | # err_if_not_set $LINENO env-var "message" | 
 | function err_if_not_set() { | 
 |     local exitcode=$? | 
 |     errinsXTRACE=$(set +o | grep xtrace) | 
 |     set +o xtrace | 
 |     local line=$1; shift | 
 |     local evar=$1; shift | 
 |     if ! is_set $evar || [ $exitcode != 0 ]; then | 
 |         err $line "$*" | 
 |     fi | 
 |     $errinsXTRACE | 
 |     return $exitcode | 
 | } | 
 |  | 
 |  | 
 | # HTTP and HTTPS proxy servers are supported via the usual environment variables [1] | 
 | # ``http_proxy``, ``https_proxy`` and ``no_proxy``. They can be set in | 
 | # ``localrc`` or on the command line if necessary:: | 
 | # | 
 | # [1] http://www.w3.org/Daemon/User/Proxies/ProxyClients.html | 
 | # | 
 | #     http_proxy=http://proxy.example.com:3128/ no_proxy=repo.example.net ./stack.sh | 
 |  | 
 | function export_proxy_variables() { | 
 |     if [[ -n "$http_proxy" ]]; then | 
 |         export http_proxy=$http_proxy | 
 |     fi | 
 |     if [[ -n "$https_proxy" ]]; then | 
 |         export https_proxy=$https_proxy | 
 |     fi | 
 |     if [[ -n "$no_proxy" ]]; then | 
 |         export no_proxy=$no_proxy | 
 |     fi | 
 | } | 
 |  | 
 |  | 
 | # Grab a numbered field from python prettytable output | 
 | # Fields are numbered starting with 1 | 
 | # Reverse syntax is supported: -1 is the last field, -2 is second to last, etc. | 
 | # get_field field-number | 
 | function get_field() { | 
 |     while read data; do | 
 |         if [ "$1" -lt 0 ]; then | 
 |             field="(\$(NF$1))" | 
 |         else | 
 |             field="\$$(($1 + 1))" | 
 |         fi | 
 |         echo "$data" | awk -F'[ \t]*\\|[ \t]*' "{print $field}" | 
 |     done | 
 | } | 
 |  | 
 |  | 
 | # Get the default value for HOST_IP | 
 | # get_default_host_ip fixed_range floating_range host_ip_iface host_ip | 
 | function get_default_host_ip() { | 
 |     local fixed_range=$1 | 
 |     local floating_range=$2 | 
 |     local host_ip_iface=$3 | 
 |     local host_ip=$4 | 
 |  | 
 |     # Find the interface used for the default route | 
 |     host_ip_iface=${host_ip_iface:-$(ip route | sed -n '/^default/{ s/.*dev \(\w\+\)\s\+.*/\1/; p; }' | head -1)} | 
 |     # Search for an IP unless an explicit is set by ``HOST_IP`` environment variable | 
 |     if [ -z "$host_ip" -o "$host_ip" == "dhcp" ]; then | 
 |         host_ip="" | 
 |         host_ips=`LC_ALL=C ip -f inet addr show ${host_ip_iface} | awk '/inet/ {split($2,parts,"/");  print parts[1]}'` | 
 |         for IP in $host_ips; do | 
 |             # Attempt to filter out IP addresses that are part of the fixed and | 
 |             # floating range. Note that this method only works if the ``netaddr`` | 
 |             # python library is installed. If it is not installed, an error | 
 |             # will be printed and the first IP from the interface will be used. | 
 |             # If that is not correct set ``HOST_IP`` in ``localrc`` to the correct | 
 |             # address. | 
 |             if ! (address_in_net $IP $fixed_range || address_in_net $IP $floating_range); then | 
 |                 host_ip=$IP | 
 |                 break; | 
 |             fi | 
 |         done | 
 |     fi | 
 |     echo $host_ip | 
 | } | 
 |  | 
 |  | 
 | function _get_package_dir() { | 
 |     local pkg_dir | 
 |     if is_ubuntu; then | 
 |         pkg_dir=$FILES/apts | 
 |     elif is_fedora; then | 
 |         pkg_dir=$FILES/rpms | 
 |     elif is_suse; then | 
 |         pkg_dir=$FILES/rpms-suse | 
 |     else | 
 |         exit_distro_not_supported "list of packages" | 
 |     fi | 
 |     echo "$pkg_dir" | 
 | } | 
 |  | 
 |  | 
 | # get_packages() collects a list of package names of any type from the | 
 | # prerequisite files in ``files/{apts|rpms}``.  The list is intended | 
 | # to be passed to a package installer such as apt or yum. | 
 | # | 
 | # Only packages required for the services in 1st argument will be | 
 | # included.  Two bits of metadata are recognized in the prerequisite files: | 
 | # - ``# NOPRIME`` defers installation to be performed later in stack.sh | 
 | # - ``# dist:DISTRO`` or ``dist:DISTRO1,DISTRO2`` limits the selection | 
 | #   of the package to the distros listed.  The distro names are case insensitive. | 
 | function get_packages() { | 
 |     local services=$1 | 
 |     local package_dir=$(_get_package_dir) | 
 |     local file_to_parse | 
 |     local service | 
 |  | 
 |     if [[ -z "$package_dir" ]]; then | 
 |         echo "No package directory supplied" | 
 |         return 1 | 
 |     fi | 
 |     if [[ -z "$DISTRO" ]]; then | 
 |         GetDistro | 
 |     fi | 
 |     for service in general ${services//,/ }; do | 
 |         # Allow individual services to specify dependencies | 
 |         if [[ -e ${package_dir}/${service} ]]; then | 
 |             file_to_parse="${file_to_parse} $service" | 
 |         fi | 
 |         # NOTE(sdague) n-api needs glance for now because that's where | 
 |         # glance client is | 
 |         if [[ $service == n-api ]]; then | 
 |             if [[ ! $file_to_parse =~ nova ]]; then | 
 |                 file_to_parse="${file_to_parse} nova" | 
 |             fi | 
 |             if [[ ! $file_to_parse =~ glance ]]; then | 
 |                 file_to_parse="${file_to_parse} glance" | 
 |             fi | 
 |         elif [[ $service == c-* ]]; then | 
 |             if [[ ! $file_to_parse =~ cinder ]]; then | 
 |                 file_to_parse="${file_to_parse} cinder" | 
 |             fi | 
 |         elif [[ $service == ceilometer-* ]]; then | 
 |             if [[ ! $file_to_parse =~ ceilometer ]]; then | 
 |                 file_to_parse="${file_to_parse} ceilometer" | 
 |             fi | 
 |         elif [[ $service == s-* ]]; then | 
 |             if [[ ! $file_to_parse =~ swift ]]; then | 
 |                 file_to_parse="${file_to_parse} swift" | 
 |             fi | 
 |         elif [[ $service == n-* ]]; then | 
 |             if [[ ! $file_to_parse =~ nova ]]; then | 
 |                 file_to_parse="${file_to_parse} nova" | 
 |             fi | 
 |         elif [[ $service == g-* ]]; then | 
 |             if [[ ! $file_to_parse =~ glance ]]; then | 
 |                 file_to_parse="${file_to_parse} glance" | 
 |             fi | 
 |         elif [[ $service == key* ]]; then | 
 |             if [[ ! $file_to_parse =~ keystone ]]; then | 
 |                 file_to_parse="${file_to_parse} keystone" | 
 |             fi | 
 |         elif [[ $service == q-* ]]; then | 
 |             if [[ ! $file_to_parse =~ neutron ]]; then | 
 |                 file_to_parse="${file_to_parse} neutron" | 
 |             fi | 
 |         fi | 
 |     done | 
 |  | 
 |     for file in ${file_to_parse}; do | 
 |         local fname=${package_dir}/${file} | 
 |         local OIFS line package distros distro | 
 |         [[ -e $fname ]] || continue | 
 |  | 
 |         OIFS=$IFS | 
 |         IFS=$'\n' | 
 |         for line in $(<${fname}); do | 
 |             if [[ $line =~ "NOPRIME" ]]; then | 
 |                 continue | 
 |             fi | 
 |  | 
 |             # Assume we want this package | 
 |             package=${line%#*} | 
 |             inst_pkg=1 | 
 |  | 
 |             # Look for # dist:xxx in comment | 
 |             if [[ $line =~ (.*)#.*dist:([^ ]*) ]]; then | 
 |                 # We are using BASH regexp matching feature. | 
 |                 package=${BASH_REMATCH[1]} | 
 |                 distros=${BASH_REMATCH[2]} | 
 |                 # In bash ${VAR,,} will lowecase VAR | 
 |                 # Look for a match in the distro list | 
 |                 if [[ ! ${distros,,} =~ ${DISTRO,,} ]]; then | 
 |                     # If no match then skip this package | 
 |                     inst_pkg=0 | 
 |                 fi | 
 |             fi | 
 |  | 
 |             # Look for # testonly in comment | 
 |             if [[ $line =~ (.*)#.*testonly.* ]]; then | 
 |                 package=${BASH_REMATCH[1]} | 
 |                 # Are we installing test packages? (test for the default value) | 
 |                 if [[ $INSTALL_TESTONLY_PACKAGES = "False" ]]; then | 
 |                     # If not installing test packages the skip this package | 
 |                     inst_pkg=0 | 
 |                 fi | 
 |             fi | 
 |  | 
 |             if [[ $inst_pkg = 1 ]]; then | 
 |                 echo $package | 
 |             fi | 
 |         done | 
 |         IFS=$OIFS | 
 |     done | 
 | } | 
 |  | 
 |  | 
 | # Determine OS Vendor, Release and Update | 
 | # Tested with OS/X, Ubuntu, RedHat, CentOS, Fedora | 
 | # Returns results in global variables: | 
 | # os_VENDOR - vendor name | 
 | # os_RELEASE - release | 
 | # os_UPDATE - update | 
 | # os_PACKAGE - package type | 
 | # os_CODENAME - vendor's codename for release | 
 | # GetOSVersion | 
 | GetOSVersion() { | 
 |     # Figure out which vendor we are | 
 |     if [[ -n "`which sw_vers 2>/dev/null`" ]]; then | 
 |         # OS/X | 
 |         os_VENDOR=`sw_vers -productName` | 
 |         os_RELEASE=`sw_vers -productVersion` | 
 |         os_UPDATE=${os_RELEASE##*.} | 
 |         os_RELEASE=${os_RELEASE%.*} | 
 |         os_PACKAGE="" | 
 |         if [[ "$os_RELEASE" =~ "10.7" ]]; then | 
 |             os_CODENAME="lion" | 
 |         elif [[ "$os_RELEASE" =~ "10.6" ]]; then | 
 |             os_CODENAME="snow leopard" | 
 |         elif [[ "$os_RELEASE" =~ "10.5" ]]; then | 
 |             os_CODENAME="leopard" | 
 |         elif [[ "$os_RELEASE" =~ "10.4" ]]; then | 
 |             os_CODENAME="tiger" | 
 |         elif [[ "$os_RELEASE" =~ "10.3" ]]; then | 
 |             os_CODENAME="panther" | 
 |         else | 
 |             os_CODENAME="" | 
 |         fi | 
 |     elif [[ -x $(which lsb_release 2>/dev/null) ]]; then | 
 |         os_VENDOR=$(lsb_release -i -s) | 
 |         os_RELEASE=$(lsb_release -r -s) | 
 |         os_UPDATE="" | 
 |         os_PACKAGE="rpm" | 
 |         if [[ "Debian,Ubuntu,LinuxMint" =~ $os_VENDOR ]]; then | 
 |             os_PACKAGE="deb" | 
 |         elif [[ "SUSE LINUX" =~ $os_VENDOR ]]; then | 
 |             lsb_release -d -s | grep -q openSUSE | 
 |             if [[ $? -eq 0 ]]; then | 
 |                 os_VENDOR="openSUSE" | 
 |             fi | 
 |         elif [[ $os_VENDOR == "openSUSE project" ]]; then | 
 |             os_VENDOR="openSUSE" | 
 |         elif [[ $os_VENDOR =~ Red.*Hat ]]; then | 
 |             os_VENDOR="Red Hat" | 
 |         fi | 
 |         os_CODENAME=$(lsb_release -c -s) | 
 |     elif [[ -r /etc/redhat-release ]]; then | 
 |         # Red Hat Enterprise Linux Server release 5.5 (Tikanga) | 
 |         # CentOS release 5.5 (Final) | 
 |         # CentOS Linux release 6.0 (Final) | 
 |         # Fedora release 16 (Verne) | 
 |         os_CODENAME="" | 
 |         for r in "Red Hat" CentOS Fedora; do | 
 |             os_VENDOR=$r | 
 |             if [[ -n "`grep \"$r\" /etc/redhat-release`" ]]; then | 
 |                 ver=`sed -e 's/^.* \(.*\) (\(.*\)).*$/\1\|\2/' /etc/redhat-release` | 
 |                 os_CODENAME=${ver#*|} | 
 |                 os_RELEASE=${ver%|*} | 
 |                 os_UPDATE=${os_RELEASE##*.} | 
 |                 os_RELEASE=${os_RELEASE%.*} | 
 |                 break | 
 |             fi | 
 |             os_VENDOR="" | 
 |         done | 
 |         os_PACKAGE="rpm" | 
 |     elif [[ -r /etc/SuSE-release ]]; then | 
 |         for r in openSUSE "SUSE Linux"; do | 
 |             if [[ "$r" = "SUSE Linux" ]]; then | 
 |                 os_VENDOR="SUSE LINUX" | 
 |             else | 
 |                 os_VENDOR=$r | 
 |             fi | 
 |  | 
 |             if [[ -n "`grep \"$r\" /etc/SuSE-release`" ]]; then | 
 |                 os_CODENAME=`grep "CODENAME = " /etc/SuSE-release | sed 's:.* = ::g'` | 
 |                 os_RELEASE=`grep "VERSION = " /etc/SuSE-release | sed 's:.* = ::g'` | 
 |                 os_UPDATE=`grep "PATCHLEVEL = " /etc/SuSE-release | sed 's:.* = ::g'` | 
 |                 break | 
 |             fi | 
 |             os_VENDOR="" | 
 |         done | 
 |         os_PACKAGE="rpm" | 
 |     # If lsb_release is not installed, we should be able to detect Debian OS | 
 |     elif [[ -f /etc/debian_version ]] && [[ $(cat /proc/version) =~ "Debian" ]]; then | 
 |         os_VENDOR="Debian" | 
 |         os_PACKAGE="deb" | 
 |         os_CODENAME=$(awk '/VERSION=/' /etc/os-release | sed 's/VERSION=//' | sed -r 's/\"|\(|\)//g' | awk '{print $2}') | 
 |         os_RELEASE=$(awk '/VERSION_ID=/' /etc/os-release | sed 's/VERSION_ID=//' | sed 's/\"//g') | 
 |     fi | 
 |     export os_VENDOR os_RELEASE os_UPDATE os_PACKAGE os_CODENAME | 
 | } | 
 |  | 
 |  | 
 | # Translate the OS version values into common nomenclature | 
 | # Sets ``DISTRO`` from the ``os_*`` values | 
 | function GetDistro() { | 
 |     GetOSVersion | 
 |     if [[ "$os_VENDOR" =~ (Ubuntu) || "$os_VENDOR" =~ (Debian) ]]; then | 
 |         # 'Everyone' refers to Ubuntu / Debian releases by the code name adjective | 
 |         DISTRO=$os_CODENAME | 
 |     elif [[ "$os_VENDOR" =~ (Fedora) ]]; then | 
 |         # For Fedora, just use 'f' and the release | 
 |         DISTRO="f$os_RELEASE" | 
 |     elif [[ "$os_VENDOR" =~ (openSUSE) ]]; then | 
 |         DISTRO="opensuse-$os_RELEASE" | 
 |     elif [[ "$os_VENDOR" =~ (SUSE LINUX) ]]; then | 
 |         # For SLE, also use the service pack | 
 |         if [[ -z "$os_UPDATE" ]]; then | 
 |             DISTRO="sle${os_RELEASE}" | 
 |         else | 
 |             DISTRO="sle${os_RELEASE}sp${os_UPDATE}" | 
 |         fi | 
 |     elif [[ "$os_VENDOR" =~ (Red Hat) || "$os_VENDOR" =~ (CentOS) ]]; then | 
 |         # Drop the . release as we assume it's compatible | 
 |         DISTRO="rhel${os_RELEASE::1}" | 
 |     else | 
 |         # Catch-all for now is Vendor + Release + Update | 
 |         DISTRO="$os_VENDOR-$os_RELEASE.$os_UPDATE" | 
 |     fi | 
 |     export DISTRO | 
 | } | 
 |  | 
 |  | 
 | # Determine if current distribution is a Fedora-based distribution | 
 | # (Fedora, RHEL, CentOS, etc). | 
 | # is_fedora | 
 | function is_fedora { | 
 |     if [[ -z "$os_VENDOR" ]]; then | 
 |         GetOSVersion | 
 |     fi | 
 |  | 
 |     [ "$os_VENDOR" = "Fedora" ] || [ "$os_VENDOR" = "Red Hat" ] || [ "$os_VENDOR" = "CentOS" ] | 
 | } | 
 |  | 
 |  | 
 | # Determine if current distribution is a SUSE-based distribution | 
 | # (openSUSE, SLE). | 
 | # is_suse | 
 | function is_suse { | 
 |     if [[ -z "$os_VENDOR" ]]; then | 
 |         GetOSVersion | 
 |     fi | 
 |  | 
 |     [ "$os_VENDOR" = "openSUSE" ] || [ "$os_VENDOR" = "SUSE LINUX" ] | 
 | } | 
 |  | 
 |  | 
 | # Determine if current distribution is an Ubuntu-based distribution | 
 | # It will also detect non-Ubuntu but Debian-based distros | 
 | # is_ubuntu | 
 | function is_ubuntu { | 
 |     if [[ -z "$os_PACKAGE" ]]; then | 
 |         GetOSVersion | 
 |     fi | 
 |     [ "$os_PACKAGE" = "deb" ] | 
 | } | 
 |  | 
 |  | 
 | # Exit after outputting a message about the distribution not being supported. | 
 | # exit_distro_not_supported [optional-string-telling-what-is-missing] | 
 | function exit_distro_not_supported { | 
 |     if [[ -z "$DISTRO" ]]; then | 
 |         GetDistro | 
 |     fi | 
 |  | 
 |     if [ $# -gt 0 ]; then | 
 |         die $LINENO "Support for $DISTRO is incomplete: no support for $@" | 
 |     else | 
 |         die $LINENO "Support for $DISTRO is incomplete." | 
 |     fi | 
 | } | 
 |  | 
 | # Utility function for checking machine architecture | 
 | # is_arch arch-type | 
 | function is_arch { | 
 |     ARCH_TYPE=$1 | 
 |  | 
 |     [ "($uname -m)" = "$ARCH_TYPE" ] | 
 | } | 
 |  | 
 | # git clone only if directory doesn't exist already.  Since ``DEST`` might not | 
 | # be owned by the installation user, we create the directory and change the | 
 | # ownership to the proper user. | 
 | # Set global RECLONE=yes to simulate a clone when dest-dir exists | 
 | # Set global ERROR_ON_CLONE=True to abort execution with an error if the git repo | 
 | # does not exist (default is False, meaning the repo will be cloned). | 
 | # Uses global ``OFFLINE`` | 
 | # git_clone remote dest-dir branch | 
 | function git_clone { | 
 |     [[ "$OFFLINE" = "True" ]] && return | 
 |  | 
 |     GIT_REMOTE=$1 | 
 |     GIT_DEST=$2 | 
 |     GIT_REF=$3 | 
 |  | 
 |     if echo $GIT_REF | egrep -q "^refs"; then | 
 |         # If our branch name is a gerrit style refs/changes/... | 
 |         if [[ ! -d $GIT_DEST ]]; then | 
 |             [[ "$ERROR_ON_CLONE" = "True" ]] && exit 1 | 
 |             git clone $GIT_REMOTE $GIT_DEST | 
 |         fi | 
 |         cd $GIT_DEST | 
 |         git fetch $GIT_REMOTE $GIT_REF && git checkout FETCH_HEAD | 
 |     else | 
 |         # do a full clone only if the directory doesn't exist | 
 |         if [[ ! -d $GIT_DEST ]]; then | 
 |             [[ "$ERROR_ON_CLONE" = "True" ]] && exit 1 | 
 |             git clone $GIT_REMOTE $GIT_DEST | 
 |             cd $GIT_DEST | 
 |             # This checkout syntax works for both branches and tags | 
 |             git checkout $GIT_REF | 
 |         elif [[ "$RECLONE" == "yes" ]]; then | 
 |             # if it does exist then simulate what clone does if asked to RECLONE | 
 |             cd $GIT_DEST | 
 |             # set the url to pull from and fetch | 
 |             git remote set-url origin $GIT_REMOTE | 
 |             git fetch origin | 
 |             # remove the existing ignored files (like pyc) as they cause breakage | 
 |             # (due to the py files having older timestamps than our pyc, so python | 
 |             # thinks the pyc files are correct using them) | 
 |             find $GIT_DEST -name '*.pyc' -delete | 
 |  | 
 |             # handle GIT_REF accordingly to type (tag, branch) | 
 |             if [[ -n "`git show-ref refs/tags/$GIT_REF`" ]]; then | 
 |                 git_update_tag $GIT_REF | 
 |             elif [[ -n "`git show-ref refs/heads/$GIT_REF`" ]]; then | 
 |                 git_update_branch $GIT_REF | 
 |             elif [[ -n "`git show-ref refs/remotes/origin/$GIT_REF`" ]]; then | 
 |                 git_update_remote_branch $GIT_REF | 
 |             else | 
 |                 echo $GIT_REF is neither branch nor tag | 
 |                 exit 1 | 
 |             fi | 
 |  | 
 |         fi | 
 |     fi | 
 | } | 
 |  | 
 |  | 
 | # git update using reference as a branch. | 
 | # git_update_branch ref | 
 | function git_update_branch() { | 
 |  | 
 |     GIT_BRANCH=$1 | 
 |  | 
 |     git checkout -f origin/$GIT_BRANCH | 
 |     # a local branch might not exist | 
 |     git branch -D $GIT_BRANCH || true | 
 |     git checkout -b $GIT_BRANCH | 
 | } | 
 |  | 
 |  | 
 | # git update using reference as a branch. | 
 | # git_update_remote_branch ref | 
 | function git_update_remote_branch() { | 
 |  | 
 |     GIT_BRANCH=$1 | 
 |  | 
 |     git checkout -b $GIT_BRANCH -t origin/$GIT_BRANCH | 
 | } | 
 |  | 
 |  | 
 | # git update using reference as a tag. Be careful editing source at that repo | 
 | # as working copy will be in a detached mode | 
 | # git_update_tag ref | 
 | function git_update_tag() { | 
 |  | 
 |     GIT_TAG=$1 | 
 |  | 
 |     git tag -d $GIT_TAG | 
 |     # fetching given tag only | 
 |     git fetch origin tag $GIT_TAG | 
 |     git checkout -f $GIT_TAG | 
 | } | 
 |  | 
 |  | 
 | # Comment an option in an INI file | 
 | # inicomment config-file section option | 
 | function inicomment() { | 
 |     local file=$1 | 
 |     local section=$2 | 
 |     local option=$3 | 
 |     sed -i -e "/^\[$section\]/,/^\[.*\]/ s|^\($option[ \t]*=.*$\)|#\1|" "$file" | 
 | } | 
 |  | 
 |  | 
 | # Uncomment an option in an INI file | 
 | # iniuncomment config-file section option | 
 | function iniuncomment() { | 
 |     local file=$1 | 
 |     local section=$2 | 
 |     local option=$3 | 
 |     sed -i -e "/^\[$section\]/,/^\[.*\]/ s|[^ \t]*#[ \t]*\($option[ \t]*=.*$\)|\1|" "$file" | 
 | } | 
 |  | 
 |  | 
 | # Get an option from an INI file | 
 | # iniget config-file section option | 
 | function iniget() { | 
 |     local file=$1 | 
 |     local section=$2 | 
 |     local option=$3 | 
 |     local line | 
 |     line=$(sed -ne "/^\[$section\]/,/^\[.*\]/ { /^$option[ \t]*=/ p; }" "$file") | 
 |     echo ${line#*=} | 
 | } | 
 |  | 
 |  | 
 | # Determinate is the given option present in the INI file | 
 | # ini_has_option config-file section option | 
 | function ini_has_option() { | 
 |     local file=$1 | 
 |     local section=$2 | 
 |     local option=$3 | 
 |     local line | 
 |     line=$(sed -ne "/^\[$section\]/,/^\[.*\]/ { /^$option[ \t]*=/ p; }" "$file") | 
 |     [ -n "$line" ] | 
 | } | 
 |  | 
 |  | 
 | # Set an option in an INI file | 
 | # iniset config-file section option value | 
 | function iniset() { | 
 |     local file=$1 | 
 |     local section=$2 | 
 |     local option=$3 | 
 |     local value=$4 | 
 |     if ! grep -q "^\[$section\]" "$file"; then | 
 |         # Add section at the end | 
 |         echo -e "\n[$section]" >>"$file" | 
 |     fi | 
 |     if ! ini_has_option "$file" "$section" "$option"; then | 
 |         # Add it | 
 |         sed -i -e "/^\[$section\]/ a\\ | 
 | $option = $value | 
 | " "$file" | 
 |     else | 
 |         # Replace it | 
 |         sed -i -e "/^\[$section\]/,/^\[.*\]/ s|^\($option[ \t]*=[ \t]*\).*$|\1$value|" "$file" | 
 |     fi | 
 | } | 
 |  | 
 |  | 
 | # Get a multiple line option from an INI file | 
 | # iniget_multiline config-file section option | 
 | function iniget_multiline() { | 
 |     local file=$1 | 
 |     local section=$2 | 
 |     local option=$3 | 
 |     local values | 
 |     values=$(sed -ne "/^\[$section\]/,/^\[.*\]/ { s/^$option[ \t]*=[ \t]*//gp; }" "$file") | 
 |     echo ${values} | 
 | } | 
 |  | 
 |  | 
 | # Set a multiple line option in an INI file | 
 | # iniset_multiline config-file section option value1 value2 valu3 ... | 
 | function iniset_multiline() { | 
 |     local file=$1 | 
 |     local section=$2 | 
 |     local option=$3 | 
 |     shift 3 | 
 |     local values | 
 |     for v in $@; do | 
 |         # The later sed command inserts each new value in the line next to | 
 |         # the section identifier, which causes the values to be inserted in | 
 |         # the reverse order. Do a reverse here to keep the original order. | 
 |         values="$v ${values}" | 
 |     done | 
 |     if ! grep -q "^\[$section\]" "$file"; then | 
 |         # Add section at the end | 
 |         echo -e "\n[$section]" >>"$file" | 
 |     else | 
 |         # Remove old values | 
 |         sed -i -e "/^\[$section\]/,/^\[.*\]/ { /^$option[ \t]*=/ d; }" "$file" | 
 |     fi | 
 |     # Add new ones | 
 |     for v in $values; do | 
 |         sed -i -e "/^\[$section\]/ a\\ | 
 | $option = $v | 
 | " "$file" | 
 |     done | 
 | } | 
 |  | 
 |  | 
 | # Append a new option in an ini file without replacing the old value | 
 | # iniadd config-file section option value1 value2 value3 ... | 
 | function iniadd() { | 
 |     local file=$1 | 
 |     local section=$2 | 
 |     local option=$3 | 
 |     shift 3 | 
 |     local values="$(iniget_multiline $file $section $option) $@" | 
 |     iniset_multiline $file $section $option $values | 
 | } | 
 |  | 
 | # Find out if a process exists by partial name. | 
 | # is_running name | 
 | function is_running() { | 
 |     local name=$1 | 
 |     ps auxw | grep -v grep | grep ${name} > /dev/null | 
 |     RC=$? | 
 |     # some times I really hate bash reverse binary logic | 
 |     return $RC | 
 | } | 
 |  | 
 |  | 
 | # is_service_enabled() checks if the service(s) specified as arguments are | 
 | # enabled by the user in ``ENABLED_SERVICES``. | 
 | # | 
 | # Multiple services specified as arguments are ``OR``'ed together; the test | 
 | # is a short-circuit boolean, i.e it returns on the first match. | 
 | # | 
 | # There are special cases for some 'catch-all' services:: | 
 | #   **nova** returns true if any service enabled start with **n-** | 
 | #   **cinder** returns true if any service enabled start with **c-** | 
 | #   **ceilometer** returns true if any service enabled start with **ceilometer** | 
 | #   **glance** returns true if any service enabled start with **g-** | 
 | #   **neutron** returns true if any service enabled start with **q-** | 
 | #   **swift** returns true if any service enabled start with **s-** | 
 | #   For backward compatibility if we have **swift** in ENABLED_SERVICES all the | 
 | #   **s-** services will be enabled. This will be deprecated in the future. | 
 | # | 
 | # Cells within nova is enabled if **n-cell** is in ``ENABLED_SERVICES``. | 
 | # We also need to make sure to treat **n-cell-region** and **n-cell-child** | 
 | # as enabled in this case. | 
 | # | 
 | # Uses global ``ENABLED_SERVICES`` | 
 | # is_service_enabled service [service ...] | 
 | function is_service_enabled() { | 
 |     services=$@ | 
 |     for service in ${services}; do | 
 |         [[ ,${ENABLED_SERVICES}, =~ ,${service}, ]] && return 0 | 
 |         [[ ${service} == n-cell-* && ${ENABLED_SERVICES} =~ "n-cell" ]] && return 0 | 
 |         [[ ${service} == "nova" && ${ENABLED_SERVICES} =~ "n-" ]] && return 0 | 
 |         [[ ${service} == "cinder" && ${ENABLED_SERVICES} =~ "c-" ]] && return 0 | 
 |         [[ ${service} == "ceilometer" && ${ENABLED_SERVICES} =~ "ceilometer-" ]] && return 0 | 
 |         [[ ${service} == "glance" && ${ENABLED_SERVICES} =~ "g-" ]] && return 0 | 
 |         [[ ${service} == "neutron" && ${ENABLED_SERVICES} =~ "q-" ]] && return 0 | 
 |         [[ ${service} == "swift" && ${ENABLED_SERVICES} =~ "s-" ]] && return 0 | 
 |         [[ ${service} == s-* && ${ENABLED_SERVICES} =~ "swift" ]] && return 0 | 
 |     done | 
 |     return 1 | 
 | } | 
 |  | 
 |  | 
 | # remove extra commas from the input string (i.e. ``ENABLED_SERVICES``) | 
 | # _cleanup_service_list service-list | 
 | function _cleanup_service_list () { | 
 |     echo "$1" | sed -e ' | 
 |         s/,,/,/g; | 
 |         s/^,//; | 
 |         s/,$// | 
 |     ' | 
 | } | 
 |  | 
 |  | 
 | # enable_service() adds the services passed as argument to the | 
 | # ``ENABLED_SERVICES`` list, if they are not already present. | 
 | # | 
 | # For example: | 
 | #   enable_service qpid | 
 | # | 
 | # This function does not know about the special cases | 
 | # for nova, glance, and neutron built into is_service_enabled(). | 
 | # Uses global ``ENABLED_SERVICES`` | 
 | # enable_service service [service ...] | 
 | function enable_service() { | 
 |     local tmpsvcs="${ENABLED_SERVICES}" | 
 |     for service in $@; do | 
 |         if ! is_service_enabled $service; then | 
 |             tmpsvcs+=",$service" | 
 |         fi | 
 |     done | 
 |     ENABLED_SERVICES=$(_cleanup_service_list "$tmpsvcs") | 
 |     disable_negated_services | 
 | } | 
 |  | 
 |  | 
 | # disable_service() removes the services passed as argument to the | 
 | # ``ENABLED_SERVICES`` list, if they are present. | 
 | # | 
 | # For example: | 
 | #   disable_service rabbit | 
 | # | 
 | # This function does not know about the special cases | 
 | # for nova, glance, and neutron built into is_service_enabled(). | 
 | # Uses global ``ENABLED_SERVICES`` | 
 | # disable_service service [service ...] | 
 | function disable_service() { | 
 |     local tmpsvcs=",${ENABLED_SERVICES}," | 
 |     local service | 
 |     for service in $@; do | 
 |         if is_service_enabled $service; then | 
 |             tmpsvcs=${tmpsvcs//,$service,/,} | 
 |         fi | 
 |     done | 
 |     ENABLED_SERVICES=$(_cleanup_service_list "$tmpsvcs") | 
 | } | 
 |  | 
 |  | 
 | # disable_all_services() removes all current services | 
 | # from ``ENABLED_SERVICES`` to reset the configuration | 
 | # before a minimal installation | 
 | # Uses global ``ENABLED_SERVICES`` | 
 | # disable_all_services | 
 | function disable_all_services() { | 
 |     ENABLED_SERVICES="" | 
 | } | 
 |  | 
 |  | 
 | # Remove all services starting with '-'.  For example, to install all default | 
 | # services except rabbit (rabbit) set in ``localrc``: | 
 | # ENABLED_SERVICES+=",-rabbit" | 
 | # Uses global ``ENABLED_SERVICES`` | 
 | # disable_negated_services | 
 | function disable_negated_services() { | 
 |     local tmpsvcs="${ENABLED_SERVICES}" | 
 |     local service | 
 |     for service in ${tmpsvcs//,/ }; do | 
 |         if [[ ${service} == -* ]]; then | 
 |             tmpsvcs=$(echo ${tmpsvcs}|sed -r "s/(,)?(-)?${service#-}(,)?/,/g") | 
 |         fi | 
 |     done | 
 |     ENABLED_SERVICES=$(_cleanup_service_list "$tmpsvcs") | 
 | } | 
 |  | 
 |  | 
 | # Distro-agnostic package installer | 
 | # install_package package [package ...] | 
 | function install_package() { | 
 |     if is_ubuntu; then | 
 |         [[ "$NO_UPDATE_REPOS" = "True" ]] || apt_get update | 
 |         NO_UPDATE_REPOS=True | 
 |  | 
 |         apt_get install "$@" | 
 |     elif is_fedora; then | 
 |         yum_install "$@" | 
 |     elif is_suse; then | 
 |         zypper_install "$@" | 
 |     else | 
 |         exit_distro_not_supported "installing packages" | 
 |     fi | 
 | } | 
 |  | 
 |  | 
 | # Distro-agnostic package uninstaller | 
 | # uninstall_package package [package ...] | 
 | function uninstall_package() { | 
 |     if is_ubuntu; then | 
 |         apt_get purge "$@" | 
 |     elif is_fedora; then | 
 |         sudo yum remove -y "$@" | 
 |     elif is_suse; then | 
 |         sudo rpm -e "$@" | 
 |     else | 
 |         exit_distro_not_supported "uninstalling packages" | 
 |     fi | 
 | } | 
 |  | 
 |  | 
 | # Distro-agnostic function to tell if a package is installed | 
 | # is_package_installed package [package ...] | 
 | function is_package_installed() { | 
 |     if [[ -z "$@" ]]; then | 
 |         return 1 | 
 |     fi | 
 |  | 
 |     if [[ -z "$os_PACKAGE" ]]; then | 
 |         GetOSVersion | 
 |     fi | 
 |  | 
 |     if [[ "$os_PACKAGE" = "deb" ]]; then | 
 |         dpkg -l "$@" > /dev/null | 
 |     elif [[ "$os_PACKAGE" = "rpm" ]]; then | 
 |         rpm --quiet -q "$@" | 
 |     else | 
 |         exit_distro_not_supported "finding if a package is installed" | 
 |     fi | 
 | } | 
 |  | 
 |  | 
 | # Test if the named environment variable is set and not zero length | 
 | # is_set env-var | 
 | function is_set() { | 
 |     local var=\$"$1" | 
 |     eval "[ -n \"$var\" ]" # For ex.: sh -c "[ -n \"$var\" ]" would be better, but several exercises depends on this | 
 | } | 
 |  | 
 |  | 
 | # Wrapper for ``pip install`` to set cache and proxy environment variables | 
 | # Uses globals ``OFFLINE``, ``PIP_DOWNLOAD_CACHE``, ``PIP_USE_MIRRORS``, | 
 | #   ``TRACK_DEPENDS``, ``*_proxy` | 
 | # pip_install package [package ...] | 
 | function pip_install { | 
 |     [[ "$OFFLINE" = "True" || -z "$@" ]] && return | 
 |     if [[ -z "$os_PACKAGE" ]]; then | 
 |         GetOSVersion | 
 |     fi | 
 |     if [[ $TRACK_DEPENDS = True ]]; then | 
 |         source $DEST/.venv/bin/activate | 
 |         CMD_PIP=$DEST/.venv/bin/pip | 
 |         SUDO_PIP="env" | 
 |     else | 
 |         SUDO_PIP="sudo" | 
 |         CMD_PIP=$(get_pip_command) | 
 |     fi | 
 |  | 
 |     # Mirror option not needed anymore because pypi has CDN available, | 
 |     # but it's useful in certain circumstances | 
 |     PIP_USE_MIRRORS=${PIP_USE_MIRRORS:-False} | 
 |     if [[ "$PIP_USE_MIRRORS" != "False" ]]; then | 
 |         PIP_MIRROR_OPT="--use-mirrors" | 
 |     fi | 
 |  | 
 |     # pip < 1.4 has a bug where it will use an already existing build | 
 |     # directory unconditionally.  Say an earlier component installs | 
 |     # foo v1.1; pip will have built foo's source in | 
 |     # /tmp/$USER-pip-build.  Even if a later component specifies foo < | 
 |     # 1.1, the existing extracted build will be used and cause | 
 |     # confusing errors.  By creating unique build directories we avoid | 
 |     # this problem. See | 
 |     #  https://github.com/pypa/pip/issues/709 | 
 |     local pip_build_tmp=$(mktemp --tmpdir -d pip-build.XXXXX) | 
 |  | 
 |     $SUDO_PIP PIP_DOWNLOAD_CACHE=${PIP_DOWNLOAD_CACHE:-/var/cache/pip} \ | 
 |         HTTP_PROXY=$http_proxy \ | 
 |         HTTPS_PROXY=$https_proxy \ | 
 |         NO_PROXY=$no_proxy \ | 
 |         $CMD_PIP install --build=${pip_build_tmp} \ | 
 |         $PIP_MIRROR_OPT $@ \ | 
 |         && $SUDO_PIP rm -rf ${pip_build_tmp} | 
 | } | 
 |  | 
 |  | 
 | # Cleanup anything from /tmp on unstack | 
 | # clean_tmp | 
 | function cleanup_tmp { | 
 |     local tmp_dir=${TMPDIR:-/tmp} | 
 |  | 
 |     # see comments in pip_install | 
 |     sudo rm -rf ${tmp_dir}/pip-build.* | 
 | } | 
 |  | 
 | # Service wrapper to restart services | 
 | # restart_service service-name | 
 | function restart_service() { | 
 |     if is_ubuntu; then | 
 |         sudo /usr/sbin/service $1 restart | 
 |     else | 
 |         sudo /sbin/service $1 restart | 
 |     fi | 
 | } | 
 |  | 
 |  | 
 | # _run_process() is designed to be backgrounded by run_process() to simulate a | 
 | # fork.  It includes the dirty work of closing extra filehandles and preparing log | 
 | # files to produce the same logs as screen_it().  The log filename is derived | 
 | # from the service name and global-and-now-misnamed SCREEN_LOGDIR | 
 | # _run_process service "command-line" | 
 | function _run_process() { | 
 |     local service=$1 | 
 |     local command="$2" | 
 |  | 
 |     # Undo logging redirections and close the extra descriptors | 
 |     exec 1>&3 | 
 |     exec 2>&3 | 
 |     exec 3>&- | 
 |     exec 6>&- | 
 |  | 
 |     if [[ -n ${SCREEN_LOGDIR} ]]; then | 
 |         exec 1>&${SCREEN_LOGDIR}/screen-${1}.${CURRENT_LOG_TIME}.log 2>&1 | 
 |         ln -sf ${SCREEN_LOGDIR}/screen-${1}.${CURRENT_LOG_TIME}.log ${SCREEN_LOGDIR}/screen-${1}.log | 
 |  | 
 |         # TODO(dtroyer): Hack to get stdout from the Python interpreter for the logs. | 
 |         export PYTHONUNBUFFERED=1 | 
 |     fi | 
 |  | 
 |     exec /bin/bash -c "$command" | 
 |     die "$service exec failure: $command" | 
 | } | 
 |  | 
 |  | 
 | # run_process() launches a child process that closes all file descriptors and | 
 | # then exec's the passed in command.  This is meant to duplicate the semantics | 
 | # of screen_it() without screen.  PIDs are written to | 
 | # $SERVICE_DIR/$SCREEN_NAME/$service.pid | 
 | # run_process service "command-line" | 
 | function run_process() { | 
 |     local service=$1 | 
 |     local command="$2" | 
 |  | 
 |     # Spawn the child process | 
 |     _run_process "$service" "$command" & | 
 |     echo $! | 
 | } | 
 |  | 
 |  | 
 | # Helper to launch a service in a named screen | 
 | # screen_it service "command-line" | 
 | function screen_it { | 
 |     SCREEN_NAME=${SCREEN_NAME:-stack} | 
 |     SERVICE_DIR=${SERVICE_DIR:-${DEST}/status} | 
 |     USE_SCREEN=$(trueorfalse True $USE_SCREEN) | 
 |  | 
 |     if is_service_enabled $1; then | 
 |         # Append the service to the screen rc file | 
 |         screen_rc "$1" "$2" | 
 |  | 
 |         if [[ "$USE_SCREEN" = "True" ]]; then | 
 |             screen -S $SCREEN_NAME -X screen -t $1 | 
 |  | 
 |             if [[ -n ${SCREEN_LOGDIR} ]]; then | 
 |                 screen -S $SCREEN_NAME -p $1 -X logfile ${SCREEN_LOGDIR}/screen-${1}.${CURRENT_LOG_TIME}.log | 
 |                 screen -S $SCREEN_NAME -p $1 -X log on | 
 |                 ln -sf ${SCREEN_LOGDIR}/screen-${1}.${CURRENT_LOG_TIME}.log ${SCREEN_LOGDIR}/screen-${1}.log | 
 |             fi | 
 |  | 
 |             # sleep to allow bash to be ready to be send the command - we are | 
 |             # creating a new window in screen and then sends characters, so if | 
 |             # bash isn't running by the time we send the command, nothing happens | 
 |             sleep 1.5 | 
 |  | 
 |             NL=`echo -ne '\015'` | 
 |             screen -S $SCREEN_NAME -p $1 -X stuff "$2 || touch \"$SERVICE_DIR/$SCREEN_NAME/$1.failure\"$NL" | 
 |         else | 
 |             # Spawn directly without screen | 
 |             run_process "$1" "$2" >$SERVICE_DIR/$SCREEN_NAME/$service.pid | 
 |         fi | 
 |     fi | 
 | } | 
 |  | 
 |  | 
 | # Screen rc file builder | 
 | # screen_rc service "command-line" | 
 | function screen_rc { | 
 |     SCREEN_NAME=${SCREEN_NAME:-stack} | 
 |     SCREENRC=$TOP_DIR/$SCREEN_NAME-screenrc | 
 |     if [[ ! -e $SCREENRC ]]; then | 
 |         # Name the screen session | 
 |         echo "sessionname $SCREEN_NAME" > $SCREENRC | 
 |         # Set a reasonable statusbar | 
 |         echo "hardstatus alwayslastline '$SCREEN_HARDSTATUS'" >> $SCREENRC | 
 |         # Some distributions override PROMPT_COMMAND for the screen terminal type - turn that off | 
 |         echo "setenv PROMPT_COMMAND /bin/true" >> $SCREENRC | 
 |         echo "screen -t shell bash" >> $SCREENRC | 
 |     fi | 
 |     # If this service doesn't already exist in the screenrc file | 
 |     if ! grep $1 $SCREENRC 2>&1 > /dev/null; then | 
 |         NL=`echo -ne '\015'` | 
 |         echo "screen -t $1 bash" >> $SCREENRC | 
 |         echo "stuff \"$2$NL\"" >> $SCREENRC | 
 |     fi | 
 | } | 
 |  | 
 |  | 
 | # Helper to remove the *.failure files under $SERVICE_DIR/$SCREEN_NAME | 
 | # This is used for service_check when all the screen_it are called finished | 
 | # init_service_check | 
 | function init_service_check() { | 
 |     SCREEN_NAME=${SCREEN_NAME:-stack} | 
 |     SERVICE_DIR=${SERVICE_DIR:-${DEST}/status} | 
 |  | 
 |     if [[ ! -d "$SERVICE_DIR/$SCREEN_NAME" ]]; then | 
 |         mkdir -p "$SERVICE_DIR/$SCREEN_NAME" | 
 |     fi | 
 |  | 
 |     rm -f "$SERVICE_DIR/$SCREEN_NAME"/*.failure | 
 | } | 
 |  | 
 |  | 
 | # Helper to get the status of each running service | 
 | # service_check | 
 | function service_check() { | 
 |     local service | 
 |     local failures | 
 |     SCREEN_NAME=${SCREEN_NAME:-stack} | 
 |     SERVICE_DIR=${SERVICE_DIR:-${DEST}/status} | 
 |  | 
 |  | 
 |     if [[ ! -d "$SERVICE_DIR/$SCREEN_NAME" ]]; then | 
 |         echo "No service status directory found" | 
 |         return | 
 |     fi | 
 |  | 
 |     # Check if there is any falure flag file under $SERVICE_DIR/$SCREEN_NAME | 
 |     failures=`ls "$SERVICE_DIR/$SCREEN_NAME"/*.failure 2>/dev/null` | 
 |  | 
 |     for service in $failures; do | 
 |         service=`basename $service` | 
 |         service=${service%.failure} | 
 |         echo "Error: Service $service is not running" | 
 |     done | 
 |  | 
 |     if [ -n "$failures" ]; then | 
 |         echo "More details about the above errors can be found with screen, with ./rejoin-stack.sh" | 
 |     fi | 
 | } | 
 |  | 
 |  | 
 | # ``pip install -e`` the package, which processes the dependencies | 
 | # using pip before running `setup.py develop` | 
 | # Uses globals ``STACK_USER``, ``TRACK_DEPENDS``, ``REQUIREMENTS_DIR`` | 
 | # setup_develop directory | 
 | function setup_develop() { | 
 |     local project_dir=$1 | 
 |     if [[ $TRACK_DEPENDS = True ]]; then | 
 |         SUDO_CMD="env" | 
 |     else | 
 |         SUDO_CMD="sudo" | 
 |     fi | 
 |  | 
 |     echo "cd $REQUIREMENTS_DIR; $SUDO_CMD python update.py $project_dir" | 
 |  | 
 |     # Don't update repo if local changes exist | 
 |     if (cd $project_dir && git diff --quiet); then | 
 |         (cd $REQUIREMENTS_DIR; \ | 
 |             $SUDO_CMD python update.py $project_dir) | 
 |     fi | 
 |  | 
 |     pip_install -e $project_dir | 
 |     # ensure that further actions can do things like setup.py sdist | 
 |     $SUDO_CMD chown -R $STACK_USER $1/*.egg-info | 
 | } | 
 |  | 
 |  | 
 | # Service wrapper to start services | 
 | # start_service service-name | 
 | function start_service() { | 
 |     if is_ubuntu; then | 
 |         sudo /usr/sbin/service $1 start | 
 |     else | 
 |         sudo /sbin/service $1 start | 
 |     fi | 
 | } | 
 |  | 
 |  | 
 | # Service wrapper to stop services | 
 | # stop_service service-name | 
 | function stop_service() { | 
 |     if is_ubuntu; then | 
 |         sudo /usr/sbin/service $1 stop | 
 |     else | 
 |         sudo /sbin/service $1 stop | 
 |     fi | 
 | } | 
 |  | 
 |  | 
 | # Normalize config values to True or False | 
 | # Accepts as False: 0 no false False FALSE | 
 | # Accepts as True: 1 yes true True TRUE | 
 | # VAR=$(trueorfalse default-value test-value) | 
 | function trueorfalse() { | 
 |     local default=$1 | 
 |     local testval=$2 | 
 |  | 
 |     [[ -z "$testval" ]] && { echo "$default"; return; } | 
 |     [[ "0 no false False FALSE" =~ "$testval" ]] && { echo "False"; return; } | 
 |     [[ "1 yes true True TRUE" =~ "$testval" ]] && { echo "True"; return; } | 
 |     echo "$default" | 
 | } | 
 |  | 
 |  | 
 | # Retrieve an image from a URL and upload into Glance | 
 | # Uses the following variables: | 
 | #   ``FILES`` must be set to the cache dir | 
 | #   ``GLANCE_HOSTPORT`` | 
 | # upload_image image-url glance-token | 
 | function upload_image() { | 
 |     local image_url=$1 | 
 |     local token=$2 | 
 |  | 
 |     # Create a directory for the downloaded image tarballs. | 
 |     mkdir -p $FILES/images | 
 |  | 
 |     # Downloads the image (uec ami+aki style), then extracts it. | 
 |     IMAGE_FNAME=`basename "$image_url"` | 
 |     if [[ ! -f $FILES/$IMAGE_FNAME || "$(stat -c "%s" $FILES/$IMAGE_FNAME)" = "0" ]]; then | 
 |         wget -c $image_url -O $FILES/$IMAGE_FNAME | 
 |         if [[ $? -ne 0 ]]; then | 
 |             echo "Not found: $image_url" | 
 |             return | 
 |         fi | 
 |     fi | 
 |  | 
 |     # OpenVZ-format images are provided as .tar.gz, but not decompressed prior to loading | 
 |     if [[ "$image_url" =~ 'openvz' ]]; then | 
 |         IMAGE="$FILES/${IMAGE_FNAME}" | 
 |         IMAGE_NAME="${IMAGE_FNAME%.tar.gz}" | 
 |         glance --os-auth-token $token --os-image-url http://$GLANCE_HOSTPORT image-create --name "$IMAGE_NAME" --is-public=True --container-format ami --disk-format ami < "${IMAGE}" | 
 |         return | 
 |     fi | 
 |  | 
 |     # vmdk format images | 
 |     if [[ "$image_url" =~ '.vmdk' ]]; then | 
 |         IMAGE="$FILES/${IMAGE_FNAME}" | 
 |         IMAGE_NAME="${IMAGE_FNAME%.vmdk}" | 
 |         glance --os-auth-token $token --os-image-url http://$GLANCE_HOSTPORT image-create --name "$IMAGE_NAME" --is-public=True --container-format bare --disk-format vmdk --property vmware-disktype="preallocated" < "${IMAGE}" | 
 |         return | 
 |     fi | 
 |  | 
 |     # XenServer-ovf-format images are provided as .vhd.tgz as well | 
 |     # and should not be decompressed prior to loading | 
 |     if [[ "$image_url" =~ '.vhd.tgz' ]]; then | 
 |         IMAGE="$FILES/${IMAGE_FNAME}" | 
 |         IMAGE_NAME="${IMAGE_FNAME%.vhd.tgz}" | 
 |         glance --os-auth-token $token --os-image-url http://$GLANCE_HOSTPORT image-create --name "$IMAGE_NAME" --is-public=True --container-format=ovf --disk-format=vhd < "${IMAGE}" | 
 |         return | 
 |     fi | 
 |  | 
 |     KERNEL="" | 
 |     RAMDISK="" | 
 |     DISK_FORMAT="" | 
 |     CONTAINER_FORMAT="" | 
 |     UNPACK="" | 
 |     case "$IMAGE_FNAME" in | 
 |         *.tar.gz|*.tgz) | 
 |             # Extract ami and aki files | 
 |             [ "${IMAGE_FNAME%.tar.gz}" != "$IMAGE_FNAME" ] && | 
 |                 IMAGE_NAME="${IMAGE_FNAME%.tar.gz}" || | 
 |                 IMAGE_NAME="${IMAGE_FNAME%.tgz}" | 
 |             xdir="$FILES/images/$IMAGE_NAME" | 
 |             rm -Rf "$xdir"; | 
 |             mkdir "$xdir" | 
 |             tar -zxf $FILES/$IMAGE_FNAME -C "$xdir" | 
 |             KERNEL=$(for f in "$xdir/"*-vmlinuz* "$xdir/"aki-*/image; do | 
 |                      [ -f "$f" ] && echo "$f" && break; done; true) | 
 |             RAMDISK=$(for f in "$xdir/"*-initrd* "$xdir/"ari-*/image; do | 
 |                      [ -f "$f" ] && echo "$f" && break; done; true) | 
 |             IMAGE=$(for f in "$xdir/"*.img "$xdir/"ami-*/image; do | 
 |                      [ -f "$f" ] && echo "$f" && break; done; true) | 
 |             if [[ -z "$IMAGE_NAME" ]]; then | 
 |                 IMAGE_NAME=$(basename "$IMAGE" ".img") | 
 |             fi | 
 |             ;; | 
 |         *.img) | 
 |             IMAGE="$FILES/$IMAGE_FNAME"; | 
 |             IMAGE_NAME=$(basename "$IMAGE" ".img") | 
 |             format=$(qemu-img info ${IMAGE} | awk '/^file format/ { print $3; exit }') | 
 |             if [[ ",qcow2,raw,vdi,vmdk,vpc," =~ ",$format," ]]; then | 
 |                 DISK_FORMAT=$format | 
 |             else | 
 |                 DISK_FORMAT=raw | 
 |             fi | 
 |             CONTAINER_FORMAT=bare | 
 |             ;; | 
 |         *.img.gz) | 
 |             IMAGE="$FILES/${IMAGE_FNAME}" | 
 |             IMAGE_NAME=$(basename "$IMAGE" ".img.gz") | 
 |             DISK_FORMAT=raw | 
 |             CONTAINER_FORMAT=bare | 
 |             UNPACK=zcat | 
 |             ;; | 
 |         *.qcow2) | 
 |             IMAGE="$FILES/${IMAGE_FNAME}" | 
 |             IMAGE_NAME=$(basename "$IMAGE" ".qcow2") | 
 |             DISK_FORMAT=qcow2 | 
 |             CONTAINER_FORMAT=bare | 
 |             ;; | 
 |         *.iso) | 
 |             IMAGE="$FILES/${IMAGE_FNAME}" | 
 |             IMAGE_NAME=$(basename "$IMAGE" ".iso") | 
 |             DISK_FORMAT=iso | 
 |             CONTAINER_FORMAT=bare | 
 |             ;; | 
 |         *) echo "Do not know what to do with $IMAGE_FNAME"; false;; | 
 |     esac | 
 |  | 
 |     if [ "$CONTAINER_FORMAT" = "bare" ]; then | 
 |         if [ "$UNPACK" = "zcat" ]; then | 
 |             glance --os-auth-token $token --os-image-url http://$GLANCE_HOSTPORT image-create --name "$IMAGE_NAME" --is-public True --container-format=$CONTAINER_FORMAT --disk-format $DISK_FORMAT < <(zcat --force "${IMAGE}") | 
 |         else | 
 |             glance --os-auth-token $token --os-image-url http://$GLANCE_HOSTPORT image-create --name "$IMAGE_NAME" --is-public True --container-format=$CONTAINER_FORMAT --disk-format $DISK_FORMAT < "${IMAGE}" | 
 |         fi | 
 |     else | 
 |         # Use glance client to add the kernel the root filesystem. | 
 |         # We parse the results of the first upload to get the glance ID of the | 
 |         # kernel for use when uploading the root filesystem. | 
 |         KERNEL_ID=""; RAMDISK_ID=""; | 
 |         if [ -n "$KERNEL" ]; then | 
 |             KERNEL_ID=$(glance --os-auth-token $token --os-image-url http://$GLANCE_HOSTPORT image-create --name "$IMAGE_NAME-kernel" --is-public True --container-format aki --disk-format aki < "$KERNEL" | grep ' id ' | get_field 2) | 
 |         fi | 
 |         if [ -n "$RAMDISK" ]; then | 
 |             RAMDISK_ID=$(glance --os-auth-token $token --os-image-url http://$GLANCE_HOSTPORT image-create --name "$IMAGE_NAME-ramdisk" --is-public True --container-format ari --disk-format ari < "$RAMDISK" | grep ' id ' | get_field 2) | 
 |         fi | 
 |         glance --os-auth-token $token --os-image-url http://$GLANCE_HOSTPORT image-create --name "${IMAGE_NAME%.img}" --is-public True --container-format ami --disk-format ami ${KERNEL_ID:+--property kernel_id=$KERNEL_ID} ${RAMDISK_ID:+--property ramdisk_id=$RAMDISK_ID} < "${IMAGE}" | 
 |     fi | 
 | } | 
 |  | 
 |  | 
 | # Set the database backend to use | 
 | # When called from stackrc/localrc DATABASE_BACKENDS has not been | 
 | # initialized yet, just save the configuration selection and call back later | 
 | # to validate it. | 
 | #  $1 The name of the database backend to use (mysql, postgresql, ...) | 
 | function use_database { | 
 |     if [[ -z "$DATABASE_BACKENDS" ]]; then | 
 |         # No backends registered means this is likely called from ``localrc`` | 
 |         # This is now deprecated usage | 
 |         DATABASE_TYPE=$1 | 
 |         DEPRECATED_TEXT="$DEPRECATED_TEXT\nThe database backend needs to be properly set in ENABLED_SERVICES; use_database is deprecated localrc\n" | 
 |     else | 
 |         # This should no longer get called...here for posterity | 
 |         use_exclusive_service DATABASE_BACKENDS DATABASE_TYPE $1 | 
 |     fi | 
 | } | 
 |  | 
 |  | 
 | # Toggle enable/disable_service for services that must run exclusive of each other | 
 | #  $1 The name of a variable containing a space-separated list of services | 
 | #  $2 The name of a variable in which to store the enabled service's name | 
 | #  $3 The name of the service to enable | 
 | function use_exclusive_service { | 
 |     local options=${!1} | 
 |     local selection=$3 | 
 |     out=$2 | 
 |     [ -z $selection ] || [[ ! "$options" =~ "$selection" ]] && return 1 | 
 |     for opt in $options;do | 
 |         [[ "$opt" = "$selection" ]] && enable_service $opt || disable_service $opt | 
 |     done | 
 |     eval "$out=$selection" | 
 |     return 0 | 
 | } | 
 |  | 
 |  | 
 | # Wait for an HTTP server to start answering requests | 
 | # wait_for_service timeout url | 
 | function wait_for_service() { | 
 |     local timeout=$1 | 
 |     local url=$2 | 
 |     timeout $timeout sh -c "while ! http_proxy= https_proxy= curl -s $url >/dev/null; do sleep 1; done" | 
 | } | 
 |  | 
 |  | 
 | # Wrapper for ``yum`` to set proxy environment variables | 
 | # Uses globals ``OFFLINE``, ``*_proxy` | 
 | # yum_install package [package ...] | 
 | function yum_install() { | 
 |     [[ "$OFFLINE" = "True" ]] && return | 
 |     local sudo="sudo" | 
 |     [[ "$(id -u)" = "0" ]] && sudo="env" | 
 |     $sudo http_proxy=$http_proxy https_proxy=$https_proxy \ | 
 |         no_proxy=$no_proxy \ | 
 |         yum install -y "$@" | 
 | } | 
 |  | 
 |  | 
 | # zypper wrapper to set arguments correctly | 
 | # zypper_install package [package ...] | 
 | function zypper_install() { | 
 |     [[ "$OFFLINE" = "True" ]] && return | 
 |     local sudo="sudo" | 
 |     [[ "$(id -u)" = "0" ]] && sudo="env" | 
 |     $sudo http_proxy=$http_proxy https_proxy=$https_proxy \ | 
 |         zypper --non-interactive install --auto-agree-with-licenses "$@" | 
 | } | 
 |  | 
 |  | 
 | # ping check | 
 | # Uses globals ``ENABLED_SERVICES`` | 
 | # ping_check from-net ip boot-timeout expected | 
 | function ping_check() { | 
 |     if is_service_enabled neutron; then | 
 |         _ping_check_neutron  "$1" $2 $3 $4 | 
 |         return | 
 |     fi | 
 |     _ping_check_novanet "$1" $2 $3 $4 | 
 | } | 
 |  | 
 | # ping check for nova | 
 | # Uses globals ``MULTI_HOST``, ``PRIVATE_NETWORK`` | 
 | function _ping_check_novanet() { | 
 |     local from_net=$1 | 
 |     local ip=$2 | 
 |     local boot_timeout=$3 | 
 |     local expected=${4:-"True"} | 
 |     local check_command="" | 
 |     MULTI_HOST=`trueorfalse False $MULTI_HOST` | 
 |     if [[ "$MULTI_HOST" = "True" && "$from_net" = "$PRIVATE_NETWORK_NAME" ]]; then | 
 |         sleep $boot_timeout | 
 |         return | 
 |     fi | 
 |     if [[ "$expected" = "True" ]]; then | 
 |         check_command="while ! ping -c1 -w1 $ip; do sleep 1; done" | 
 |     else | 
 |         check_command="while ping -c1 -w1 $ip; do sleep 1; done" | 
 |     fi | 
 |     if ! timeout $boot_timeout sh -c "$check_command"; then | 
 |         if [[ "$expected" = "True" ]]; then | 
 |             die $LINENO "[Fail] Couldn't ping server" | 
 |         else | 
 |             die $LINENO "[Fail] Could ping server" | 
 |         fi | 
 |         exit 1 | 
 |     fi | 
 | } | 
 |  | 
 |  | 
 | # ssh check | 
 |  | 
 | # ssh_check net-name key-file floating-ip default-user active-timeout | 
 | function ssh_check() { | 
 |     if is_service_enabled neutron; then | 
 |         _ssh_check_neutron  "$1" $2 $3 $4 $5 | 
 |         return | 
 |     fi | 
 |     _ssh_check_novanet "$1" $2 $3 $4 $5 | 
 | } | 
 |  | 
 | function _ssh_check_novanet() { | 
 |     local NET_NAME=$1 | 
 |     local KEY_FILE=$2 | 
 |     local FLOATING_IP=$3 | 
 |     local DEFAULT_INSTANCE_USER=$4 | 
 |     local ACTIVE_TIMEOUT=$5 | 
 |     local probe_cmd="" | 
 |     if ! timeout $ACTIVE_TIMEOUT sh -c "while ! ssh -o StrictHostKeyChecking=no -i $KEY_FILE ${DEFAULT_INSTANCE_USER}@$FLOATING_IP echo success; do sleep 1; done"; then | 
 |         die $LINENO "server didn't become ssh-able!" | 
 |     fi | 
 | } | 
 |  | 
 |  | 
 | # Add a user to a group. | 
 | # add_user_to_group user group | 
 | function add_user_to_group() { | 
 |     local user=$1 | 
 |     local group=$2 | 
 |  | 
 |     if [[ -z "$os_VENDOR" ]]; then | 
 |         GetOSVersion | 
 |     fi | 
 |  | 
 |     # SLE11 and openSUSE 12.2 don't have the usual usermod | 
 |     if ! is_suse || [[ "$os_VENDOR" = "openSUSE" && "$os_RELEASE" != "12.2" ]]; then | 
 |         sudo usermod -a -G "$group" "$user" | 
 |     else | 
 |         sudo usermod -A "$group" "$user" | 
 |     fi | 
 | } | 
 |  | 
 |  | 
 | # Get the path to the direcotry where python executables are installed. | 
 | # get_python_exec_prefix | 
 | function get_python_exec_prefix() { | 
 |     if is_fedora || is_suse; then | 
 |         echo "/usr/bin" | 
 |     else | 
 |         echo "/usr/local/bin" | 
 |     fi | 
 | } | 
 |  | 
 |  | 
 | # Get the location of the $module-rootwrap executables, where module is cinder | 
 | # or nova. | 
 | # get_rootwrap_location module | 
 | function get_rootwrap_location() { | 
 |     local module=$1 | 
 |  | 
 |     echo "$(get_python_exec_prefix)/$module-rootwrap" | 
 | } | 
 |  | 
 |  | 
 | # Get the path to the pip command. | 
 | # get_pip_command | 
 | function get_pip_command() { | 
 |     which pip || which pip-python | 
 |  | 
 |     if [ $? -ne 0 ]; then | 
 |         die $LINENO "Unable to find pip; cannot continue" | 
 |     fi | 
 | } | 
 |  | 
 |  | 
 | # Path permissions sanity check | 
 | # check_path_perm_sanity path | 
 | function check_path_perm_sanity() { | 
 |     # Ensure no element of the path has 0700 permissions, which is very | 
 |     # likely to cause issues for daemons.  Inspired by default 0700 | 
 |     # homedir permissions on RHEL and common practice of making DEST in | 
 |     # the stack user's homedir. | 
 |  | 
 |     local real_path=$(readlink -f $1) | 
 |     local rebuilt_path="" | 
 |     for i in $(echo ${real_path} | tr "/" " "); do | 
 |         rebuilt_path=$rebuilt_path"/"$i | 
 |  | 
 |         if [[ $(stat -c '%a' ${rebuilt_path}) = 700 ]]; then | 
 |             echo "*** DEST path element" | 
 |             echo "***    ${rebuilt_path}" | 
 |             echo "*** appears to have 0700 permissions." | 
 |             echo "*** This is very likely to cause fatal issues for devstack daemons." | 
 |  | 
 |             if [[ -n "$SKIP_PATH_SANITY" ]]; then | 
 |                 return | 
 |             else | 
 |                 echo "*** Set SKIP_PATH_SANITY to skip this check" | 
 |                 die $LINENO "Invalid path permissions" | 
 |             fi | 
 |         fi | 
 |     done | 
 | } | 
 |  | 
 |  | 
 | # This function recursively compares versions, and is not meant to be | 
 | # called by anything other than vercmp_numbers below. This function does | 
 | # not work with alphabetic versions. | 
 | # | 
 | # _vercmp_r sep ver1 ver2 | 
 | function _vercmp_r { | 
 |   typeset sep | 
 |   typeset -a ver1=() ver2=() | 
 |   sep=$1; shift | 
 |   ver1=("${@:1:sep}") | 
 |   ver2=("${@:sep+1}") | 
 |  | 
 |   if ((ver1 > ver2)); then | 
 |     echo 1; return 0 | 
 |   elif ((ver2 > ver1)); then | 
 |     echo -1; return 0 | 
 |   fi | 
 |  | 
 |   if ((sep <= 1)); then | 
 |     echo 0; return 0 | 
 |   fi | 
 |  | 
 |   _vercmp_r $((sep-1)) "${ver1[@]:1}" "${ver2[@]:1}" | 
 | } | 
 |  | 
 |  | 
 | # This function compares two versions and is meant to be called by | 
 | # external callers. Please note the function assumes non-alphabetic | 
 | # versions. For example, this will work: | 
 | # | 
 | #   vercmp_numbers 1.10 1.4 | 
 | # | 
 | # The above will return "1", as 1.10 is greater than 1.4. | 
 | # | 
 | #   vercmp_numbers 5.2 6.4 | 
 | # | 
 | # The above will return "-1", as 5.2 is less than 6.4. | 
 | # | 
 | #   vercmp_numbers 4.0 4.0 | 
 | # | 
 | # The above will return "0", as the versions are equal. | 
 | # | 
 | # vercmp_numbers ver1 ver2 | 
 | vercmp_numbers() { | 
 |   typeset v1=$1 v2=$2 sep | 
 |   typeset -a ver1 ver2 | 
 |  | 
 |   IFS=. read -ra ver1 <<< "$v1" | 
 |   IFS=. read -ra ver2 <<< "$v2" | 
 |  | 
 |   _vercmp_r "${#ver1[@]}" "${ver1[@]}" "${ver2[@]}" | 
 | } | 
 |  | 
 |  | 
 | # Restore xtrace | 
 | $XTRACE | 
 |  | 
 |  | 
 | # Local variables: | 
 | # mode: shell-script | 
 | # End: |