diff --git a/Makefile b/Makefile
index a6bb230..a94d60a 100644
--- a/Makefile
+++ b/Makefile
@@ -13,7 +13,6 @@
 
 # Duplicated from stackrc for now
 DEST=/opt/stack
-WHEELHOUSE=$(DEST)/.wheelhouse
 
 all:
 	echo "This just saved you from a terrible mistake!"
@@ -25,9 +24,6 @@
 unstack:
 	./unstack.sh
 
-wheels:
-	WHEELHOUSE=$(WHEELHOUSE) tools/build_wheels.sh
-
 docs:
 	tox -edocs
 
@@ -57,7 +53,7 @@
 
 # Clean out the cache too
 realclean: clean
-	rm -rf files/cirros*.tar.gz files/Fedora*.qcow2 $(WHEELHOUSE)
+	rm -rf files/cirros*.tar.gz files/Fedora*.qcow2
 
 # Repo stuffs
 
diff --git a/doc/source/index.rst b/doc/source/index.rst
index 99e96b1..b65730f 100644
--- a/doc/source/index.rst
+++ b/doc/source/index.rst
@@ -206,7 +206,6 @@
 
 * `tools/build\_docs.sh <tools/build_docs.sh.html>`__
 * `tools/build\_venv.sh <tools/build_venv.sh.html>`__
-* `tools/build\_wheels.sh <tools/build_wheels.sh.html>`__
 * `tools/create-stack-user.sh <tools/create-stack-user.sh.html>`__
 * `tools/create\_userrc.sh <tools/create_userrc.sh.html>`__
 * `tools/fixup\_stuff.sh <tools/fixup_stuff.sh.html>`__
diff --git a/exercises/client-args.sh b/exercises/client-args.sh
index c33ef44..7cfef1c 100755
--- a/exercises/client-args.sh
+++ b/exercises/client-args.sh
@@ -41,7 +41,6 @@
 unset NOVA_REGION_NAME
 unset NOVA_URL
 unset NOVA_USERNAME
-unset NOVA_VERSION
 
 # Save the known variables for later
 export x_TENANT_NAME=$OS_TENANT_NAME
diff --git a/exercises/client-env.sh b/exercises/client-env.sh
index 4a0609a..1d2f4f5 100755
--- a/exercises/client-env.sh
+++ b/exercises/client-env.sh
@@ -41,7 +41,6 @@
 unset NOVA_REGION_NAME
 unset NOVA_URL
 unset NOVA_USERNAME
-unset NOVA_VERSION
 
 for i in OS_TENANT_NAME OS_USERNAME OS_PASSWORD OS_AUTH_URL; do
     is_set $i
@@ -101,9 +100,6 @@
             STATUS_EC2="Failed"
             RETURN=1
         fi
-
-        # Clean up side effects
-        unset NOVA_VERSION
     fi
 fi
 
diff --git a/files/apache-keystone.template b/files/apache-keystone.template
index 4d3d2d6..f9fa265 100644
--- a/files/apache-keystone.template
+++ b/files/apache-keystone.template
@@ -2,6 +2,16 @@
 Listen %ADMINPORT%
 LogFormat "%h %l %u %t \"%r\" %>s %b \"%{Referer}i\" \"%{User-agent}i\" %D(us)" keystone_combined
 
+<Directory %KEYSTONE_BIN%>
+    <IfVersion >= 2.4>
+        Require all granted
+    </IfVersion>
+    <IfVersion < 2.4>
+        Order allow,deny
+        Allow from all
+    </IfVersion>
+</Directory>
+
 <VirtualHost *:%PUBLICPORT%>
     WSGIDaemonProcess keystone-public processes=5 threads=1 user=%USER% display-name=%{GROUP} %VIRTUALENV%
     WSGIProcessGroup keystone-public
@@ -16,16 +26,6 @@
     %SSLENGINE%
     %SSLCERTFILE%
     %SSLKEYFILE%
-
-    <Directory %KEYSTONE_BIN%>
-        <IfVersion >= 2.4>
-            Require all granted
-        </IfVersion>
-        <IfVersion < 2.4>
-            Order allow,deny
-            Allow from all
-        </IfVersion>
-    </Directory>
 </VirtualHost>
 
 <VirtualHost *:%ADMINPORT%>
@@ -42,19 +42,9 @@
     %SSLENGINE%
     %SSLCERTFILE%
     %SSLKEYFILE%
-
-    <Directory %KEYSTONE_BIN%>
-        <IfVersion >= 2.4>
-            Require all granted
-        </IfVersion>
-        <IfVersion < 2.4>
-            Order allow,deny
-            Allow from all
-        </IfVersion>
-    </Directory>
 </VirtualHost>
 
-Alias /identity %PUBLICWSGI%
+Alias /identity %KEYSTONE_BIN%/keystone-wsgi-public
 <Location /identity>
     SetHandler wsgi-script
     Options +ExecCGI
@@ -64,7 +54,7 @@
     WSGIPassAuthorization On
 </Location>
 
-Alias /identity_admin %ADMINWSGI%
+Alias /identity_admin %KEYSTONE_BIN%/keystone-wsgi-admin
 <Location /identity_admin>
     SetHandler wsgi-script
     Options +ExecCGI
diff --git a/files/venv-requirements.txt b/files/venv-requirements.txt
deleted file mode 100644
index b9a55b4..0000000
--- a/files/venv-requirements.txt
+++ /dev/null
@@ -1,11 +0,0 @@
-# Once we can prebuild wheels before a devstack run, uncomment the skipped libraries
-cryptography
-# lxml # still install from from packages
-# netifaces # still install from packages
-#numpy    # slowest wheel by far, stop building until we are actually using the output
-posix-ipc
-# psycopg # still install from packages
-pycrypto
-pyOpenSSL
-PyYAML
-xattr
diff --git a/functions-common b/functions-common
index d36d323..497bed2 100644
--- a/functions-common
+++ b/functions-common
@@ -1163,7 +1163,7 @@
 
     if is_ubuntu; then
         local xtrace
-    xtrace=$(set +o | grep xtrace)
+        xtrace=$(set +o | grep xtrace)
         set +o xtrace
         if [[ "$REPOS_UPDATED" != "True" || "$RETRY_UPDATE" = "True" ]]; then
             # if there are transient errors pulling the updates, that's fine.
@@ -1775,11 +1775,17 @@
 # remove extra commas from the input string (i.e. ``ENABLED_SERVICES``)
 # _cleanup_service_list service-list
 function _cleanup_service_list {
+    local xtrace
+    xtrace=$(set +o | grep xtrace)
+    set +o xtrace
+
     echo "$1" | sed -e '
         s/,,/,/g;
         s/^,//;
         s/,$//
     '
+
+    $xtrace
 }
 
 # disable_all_services() removes all current services
@@ -1797,6 +1803,10 @@
 # Uses global ``ENABLED_SERVICES``
 # disable_negated_services
 function disable_negated_services {
+    local xtrace
+    xtrace=$(set +o | grep xtrace)
+    set +o xtrace
+
     local to_remove=""
     local remaining=""
     local service
@@ -1814,6 +1824,8 @@
     # go through the service list.  if this service appears in the "to
     # be removed" list, drop it
     ENABLED_SERVICES=$(remove_disabled_services "$remaining" "$to_remove")
+
+    $xtrace
 }
 
 # disable_service() prepares the services passed as argument to be
@@ -1825,6 +1837,10 @@
 # Uses global ``DISABLED_SERVICES``
 # disable_service service [service ...]
 function disable_service {
+    local xtrace
+    xtrace=$(set +o | grep xtrace)
+    set +o xtrace
+
     local disabled_svcs="${DISABLED_SERVICES}"
     local enabled_svcs=",${ENABLED_SERVICES},"
     local service
@@ -1836,6 +1852,8 @@
     done
     DISABLED_SERVICES=$(_cleanup_service_list "$disabled_svcs")
     ENABLED_SERVICES=$(_cleanup_service_list "$enabled_svcs")
+
+    $xtrace
 }
 
 # enable_service() adds the services passed as argument to the
@@ -1849,6 +1867,10 @@
 # Uses global ``ENABLED_SERVICES``
 # enable_service service [service ...]
 function enable_service {
+    local xtrace
+    xtrace=$(set +o | grep xtrace)
+    set +o xtrace
+
     local tmpsvcs="${ENABLED_SERVICES}"
     local service
     for service in $@; do
@@ -1862,6 +1884,8 @@
     done
     ENABLED_SERVICES=$(_cleanup_service_list "$tmpsvcs")
     disable_negated_services
+
+    $xtrace
 }
 
 # is_service_enabled() checks if the service(s) specified as arguments are
@@ -1890,6 +1914,7 @@
     local xtrace
     xtrace=$(set +o | grep xtrace)
     set +o xtrace
+
     local enabled=1
     local services=$@
     local service
@@ -1915,6 +1940,7 @@
         [[ ${service} == "swift" && ${ENABLED_SERVICES} =~ "s-" ]] && enabled=0
         [[ ${service} == s-* && ${ENABLED_SERVICES} =~ "swift" ]] && enabled=0
     done
+
     $xtrace
     return $enabled
 }
@@ -1922,6 +1948,10 @@
 # remove specified list from the input string
 # remove_disabled_services service-list remove-list
 function remove_disabled_services {
+    local xtrace
+    xtrace=$(set +o | grep xtrace)
+    set +o xtrace
+
     local service_list=$1
     local remove_list=$2
     local service
@@ -1940,6 +1970,9 @@
             enabled="${enabled},$service"
         fi
     done
+
+    $xtrace
+
     _cleanup_service_list "$enabled"
 }
 
diff --git a/inc/meta-config b/inc/meta-config
index d74db59..b9ab6b2 100644
--- a/inc/meta-config
+++ b/inc/meta-config
@@ -92,7 +92,7 @@
     local real_configfile
     real_configfile=$(eval echo $configfile)
     if [ ! -f $real_configfile ]; then
-        touch $real_configfile
+        touch $real_configfile || die $LINENO "could not create config file $real_configfile ($configfile)"
     fi
 
     get_meta_section $file $matchgroup $configfile | \
@@ -178,8 +178,18 @@
     local configfile group
     for group in $matchgroups; do
         for configfile in $(get_meta_section_files $localfile $group); do
-            if [[ -d $(dirname $(eval "echo $configfile")) ]]; then
+            local realconfigfile
+            local dir
+
+            realconfigfile=$(eval "echo $configfile")
+            if [[ -z $realconfigfile ]]; then
+                die $LINENO "bogus config file specification: $configfile is undefined"
+            fi
+            dir=$(dirname $realconfigfile)
+            if [[ -d $dir ]]; then
                 merge_config_file $localfile $group $configfile
+            else
+                die $LINENO "bogus config file specification $configfile ($configfile=$realconfigfile, $dir is not a directory)"
             fi
         done
     done
diff --git a/lib/cinder b/lib/cinder
index ed9a103..1307c11 100644
--- a/lib/cinder
+++ b/lib/cinder
@@ -317,9 +317,7 @@
 
     iniset_rpc_backend cinder $CINDER_CONF
 
-    if [[ "$CINDER_VOLUME_CLEAR" == "none" ]] || [[ "$CINDER_VOLUME_CLEAR" == "zero" ]] || [[ "$CINDER_VOLUME_CLEAR" == "shred" ]]; then
-        iniset $CINDER_CONF DEFAULT volume_clear $CINDER_VOLUME_CLEAR
-    fi
+    iniset $CINDER_CONF DEFAULT volume_clear $CINDER_VOLUME_CLEAR
 
     # Format logging
     if [ "$LOG_COLOR" == "True" ] && [ "$SYSLOG" == "False" ] && [ "$CINDER_USE_MOD_WSGI" == "False" ]; then
diff --git a/lib/heat b/lib/heat
index f3f0548..e42bdf0 100644
--- a/lib/heat
+++ b/lib/heat
@@ -69,6 +69,8 @@
     HEAT_STACK_DOMAIN=$(trueorfalse True HEAT_STACK_DOMAIN)
     HEAT_DEFERRED_AUTH=${HEAT_DEFERRED_AUTH:-trusts}
 fi
+HEAT_PLUGIN_DIR=${HEAT_PLUGIN_DIR:-$DATA_DIR/heat/plugins}
+ENABLE_HEAT_PLUGINS=${ENABLE_HEAT_PLUGINS:-}
 
 # Functions
 # ---------
@@ -188,6 +190,35 @@
     # copy the default templates
     cp $HEAT_DIR/etc/heat/templates/* $HEAT_TEMPLATES_DIR/
 
+    # Enable heat plugins.
+    # NOTE(nic): The symlink nonsense is necessary because when
+    # plugins are installed in "developer mode", the final component
+    # of their target directory is always "resources", which confuses
+    # Heat's plugin loader into believing that all plugins are named
+    # "resources", and therefore are all the same plugin; so it
+    # will only load one of them.  Linking them all to a common
+    # location with unique names avoids that type of collision,
+    # while still allowing the plugins to be edited in-tree.
+    local err_count=0
+
+    if [ -n "$ENABLE_HEAT_PLUGINS" ]; then
+        mkdir -p $HEAT_PLUGIN_DIR
+        # Clean up cruft from any previous runs
+        rm -f $HEAT_PLUGIN_DIR/*
+        iniset $HEAT_CONF DEFAULT plugin_dirs $HEAT_PLUGIN_DIR
+    fi
+
+    for heat_plugin in $ENABLE_HEAT_PLUGINS; do
+        if [ -d $HEAT_DIR/contrib/$heat_plugin ]; then
+            setup_package $HEAT_DIR/contrib/$heat_plugin -e
+            ln -s $HEAT_DIR/contrib/$heat_plugin/$heat_plugin/resources $HEAT_PLUGIN_DIR/$heat_plugin
+        else
+            : # clear retval on the test so that we can roll up errors
+            err $LINENO "Requested Heat plugin(${heat_plugin}) not found."
+            err_count=$(($err_count + 1))
+        fi
+    done
+    [ $err_count -eq 0 ] || die $LINENO "$err_count of the requested Heat plugins could not be installed."
 }
 
 # init_heat() - Initialize database
diff --git a/lib/neutron-legacy b/lib/neutron-legacy
index 3c3c96b..c244e54 100644
--- a/lib/neutron-legacy
+++ b/lib/neutron-legacy
@@ -547,7 +547,7 @@
         fi
 
         if [[ "$IP_VERSION" =~ .*6 ]]; then
-            SUBNET_V6_ID=$(neutron subnet-create --tenant_id $TENANT_ID --ip_version 6 --ipv6-address-mode slaac --gateway $V6_NETWORK_GATEWAY --name $PROVIDER_SUBNET_NAME_V6 $NET_ID $FIXED_RANGE_V6 | grep 'id' | get_field 2)
+            SUBNET_V6_ID=$(neutron subnet-create --tenant_id $TENANT_ID --ip_version 6 --ipv6-address-mode $IPV6_ADDRESS_MODE --gateway $V6_NETWORK_GATEWAY --name $PROVIDER_SUBNET_NAME_V6 $NET_ID $FIXED_RANGE_V6 | grep 'id' | get_field 2)
             die_if_not_set $LINENO SUBNET_V6_ID "Failure creating SUBNET_V6_ID for $PROVIDER_SUBNET_NAME_V6 $TENANT_ID"
         fi
 
diff --git a/lib/neutron_plugins/bigswitch_floodlight b/lib/neutron_plugins/bigswitch_floodlight
index 4166131..f52105e 100644
--- a/lib/neutron_plugins/bigswitch_floodlight
+++ b/lib/neutron_plugins/bigswitch_floodlight
@@ -58,9 +58,9 @@
 function neutron_plugin_setup_interface_driver {
     local conf_file=$1
     if [ "$BS_FL_VIF_DRIVER" = "ivs" ]; then
-        iniset $conf_file DEFAULT interface_driver neutron.agent.linux.interface.IVSInterfaceDriver
+        iniset $conf_file DEFAULT interface_driver ivs
     else
-        iniset $conf_file DEFAULT interface_driver neutron.agent.linux.interface.OVSInterfaceDriver
+        iniset $conf_file DEFAULT interface_driver openvswitch
     fi
 }
 
diff --git a/lib/neutron_plugins/brocade b/lib/neutron_plugins/brocade
index 557b94d..953360e 100644
--- a/lib/neutron_plugins/brocade
+++ b/lib/neutron_plugins/brocade
@@ -68,7 +68,7 @@
 
 function neutron_plugin_setup_interface_driver {
     local conf_file=$1
-    iniset $conf_file DEFAULT interface_driver neutron.agent.linux.interface.BridgeInterfaceDriver
+    iniset $conf_file DEFAULT interface_driver linuxbridge
 }
 
 function has_neutron_plugin_security_group {
diff --git a/lib/neutron_plugins/cisco b/lib/neutron_plugins/cisco
index 90dcd57..7d0cf1a 100644
--- a/lib/neutron_plugins/cisco
+++ b/lib/neutron_plugins/cisco
@@ -150,7 +150,7 @@
 
 function neutron_plugin_setup_interface_driver {
     local conf_file=$1
-    iniset $conf_file DEFAULT interface_driver neutron.agent.linux.interface.OVSInterfaceDriver
+    iniset $conf_file DEFAULT interface_driver openvswitch
 }
 
 # Restore xtrace
diff --git a/lib/neutron_plugins/linuxbridge_agent b/lib/neutron_plugins/linuxbridge_agent
index bd4438d..f28bcfe 100644
--- a/lib/neutron_plugins/linuxbridge_agent
+++ b/lib/neutron_plugins/linuxbridge_agent
@@ -85,7 +85,7 @@
 
 function neutron_plugin_setup_interface_driver {
     local conf_file=$1
-    iniset $conf_file DEFAULT interface_driver neutron.agent.linux.interface.BridgeInterfaceDriver
+    iniset $conf_file DEFAULT interface_driver linuxbridge
 }
 
 function neutron_plugin_check_adv_test_requirements {
diff --git a/lib/neutron_plugins/openvswitch_agent b/lib/neutron_plugins/openvswitch_agent
index 48e47b3..5a843ff 100644
--- a/lib/neutron_plugins/openvswitch_agent
+++ b/lib/neutron_plugins/openvswitch_agent
@@ -110,7 +110,7 @@
 
 function neutron_plugin_setup_interface_driver {
     local conf_file=$1
-    iniset $conf_file DEFAULT interface_driver neutron.agent.linux.interface.OVSInterfaceDriver
+    iniset $conf_file DEFAULT interface_driver openvswitch
 }
 
 function neutron_plugin_check_adv_test_requirements {
diff --git a/lib/nova b/lib/nova
index 6c41403..47c43bd 100644
--- a/lib/nova
+++ b/lib/nova
@@ -480,7 +480,6 @@
 
     # (Re)create ``nova.conf``
     rm -f $NOVA_CONF
-    iniset $NOVA_CONF DEFAULT verbose "True"
     iniset $NOVA_CONF DEFAULT debug "$ENABLE_DEBUG_LOG_LEVEL"
     if [ "$NOVA_ALLOW_MOVE_TO_SAME_HOST" == "True" ]; then
         iniset $NOVA_CONF DEFAULT allow_resize_to_same_host "True"
diff --git a/lib/nova_plugins/functions-libvirt b/lib/nova_plugins/functions-libvirt
index 5525cfd..78c5978 100644
--- a/lib/nova_plugins/functions-libvirt
+++ b/lib/nova_plugins/functions-libvirt
@@ -23,7 +23,7 @@
 # Installs required distro-specific libvirt packages.
 function install_libvirt {
     if is_ubuntu; then
-        if is_arch "aarch64" && [[ ${DISTRO} =~ (trusty|utopic) ]]; then
+        if is_arch "aarch64" && [[ ${DISTRO} == "trusty" ]]; then
             install_package qemu-system
         else
             install_package qemu-kvm
diff --git a/openrc b/openrc
index 71ba5a6..9bc0fd7 100644
--- a/openrc
+++ b/openrc
@@ -95,12 +95,6 @@
     fi
 fi
 
-# Currently novaclient needs you to specify the *compute api* version.  This
-# needs to match the config of your catalog returned by Keystone.
-export NOVA_VERSION=${NOVA_VERSION:-1.1}
-# In the future this will change names:
-export COMPUTE_API_VERSION=${COMPUTE_API_VERSION:-$NOVA_VERSION}
-
 # Currently cinderclient needs you to specify the *volume api* version. This
 # needs to match the config of your catalog returned by Keystone.
 export CINDER_VERSION=${CINDER_VERSION:-2}
diff --git a/stack.sh b/stack.sh
index 8024731..aedc5d4 100755
--- a/stack.sh
+++ b/stack.sh
@@ -178,7 +178,7 @@
 
 # Warn users who aren't on an explicitly supported distro, but allow them to
 # override check and attempt installation with ``FORCE=yes ./stack``
-if [[ ! ${DISTRO} =~ (precise|trusty|utopic|vivid|7.0|wheezy|sid|testing|jessie|f21|f22|rhel7) ]]; then
+if [[ ! ${DISTRO} =~ (precise|trusty|vivid|7.0|wheezy|sid|testing|jessie|f21|f22|rhel7) ]]; then
     echo "WARNING: this script has not been tested on $DISTRO"
     if [[ "$FORCE" != "yes" ]]; then
         die $LINENO "If you wish to run this script anyway run with FORCE=yes"
@@ -716,12 +716,6 @@
 # Install required infra support libraries
 install_infra
 
-# Pre-build some problematic wheels
-if [[ -n ${WHEELHOUSE:-} && ! -d ${WHEELHOUSE:-} ]]; then
-    source $TOP_DIR/tools/build_wheels.sh
-fi
-
-
 # Extras Pre-install
 # ------------------
 # Phase: pre-install
diff --git a/stackrc b/stackrc
index 819aa01..d9f477e 100644
--- a/stackrc
+++ b/stackrc
@@ -143,11 +143,6 @@
 # requirmenets files here, in a comma-separated list
 ADDITIONAL_VENV_PACKAGES=${ADITIONAL_VENV_PACKAGES:-""}
 
-# Configure wheel cache location
-export WHEELHOUSE=${WHEELHOUSE:-$DEST/.wheelhouse}
-export PIP_WHEEL_DIR=${PIP_WHEEL_DIR:-$WHEELHOUSE}
-export PIP_FIND_LINKS=${PIP_FIND_LINKS:-file://$WHEELHOUSE}
-
 # This can be used to turn database query logging on and off
 # (currently only implemented for MySQL backend)
 DATABASE_QUERY_LOGGING=$(trueorfalse False DATABASE_QUERY_LOGGING)
diff --git a/tests/test_meta_config.sh b/tests/test_meta_config.sh
index a04c081..f3e94af 100755
--- a/tests/test_meta_config.sh
+++ b/tests/test_meta_config.sh
@@ -23,6 +23,12 @@
     fi
 }
 
+# mock function-common:die so that it does not
+# interupt our test script
+function die {
+    exit -1
+}
+
 TEST_1C_ADD="[eee]
 type=new
 multi = foo2"
@@ -110,6 +116,15 @@
 [DEFAULT]
 servers=10.11.12.13:80
 
+[[test8|/permission-denied.conf]]
+foo=bar
+
+[[test9|\$UNDEF]]
+foo=bar
+
+[[test10|does-not-exist-dir/test.conf]]
+foo=bar
+
 [[test-multi-sections|test-multi-sections.conf]]
 [sec-1]
 cfg_item1 = abcd
@@ -340,6 +355,36 @@
 servers = 10.11.12.13:80"
 check_result "$VAL" "$EXPECT_VAL"
 
+echo "merge_config_file test8 non-touchable conf file: "
+set +e
+# function is expected to fail and exit, running it
+# in a subprocess to let this script proceed
+(merge_config_file test.conf test8 /permission-denied.conf)
+VAL=$?
+EXPECT_VAL=255
+check_result "$VAL" "$EXPECT_VAL"
+set -e
+
+echo -n "merge_config_group test9 undefined conf file: "
+set +e
+# function is expected to fail and exit, running it
+# in a subprocess to let this script proceed
+(merge_config_group test.conf test9)
+VAL=$?
+EXPECT_VAL=255
+check_result "$VAL" "$EXPECT_VAL"
+set -e
+
+echo -n "merge_config_group test10 not directory: "
+set +e
+# function is expected to fail and exit, running it
+# in a subprocess to let this script proceed
+(merge_config_group test.conf test10)
+VAL=$?
+EXPECT_VAL=255
+check_result "$VAL" "$EXPECT_VAL"
+set -e
+
 rm -f test.conf test1c.conf test2a.conf \
     test-space.conf test-equals.conf test-strip.conf \
     test-colon.conf test-env.conf test-multiline.conf \
diff --git a/tools/build_wheels.sh b/tools/build_wheels.sh
deleted file mode 100755
index 14c2999..0000000
--- a/tools/build_wheels.sh
+++ /dev/null
@@ -1,86 +0,0 @@
-#!/usr/bin/env bash
-#
-# **tools/build_wheels.sh** - Build a cache of Python wheels
-#
-# build_wheels.sh [package [...]]
-#
-# System package prerequisites listed in ``files/*/devlibs`` will be installed
-#
-# Builds wheels for all virtual env requirements listed in
-# ``venv-requirements.txt`` plus any supplied on the command line.
-#
-# Assumes:
-# - ``tools/install_pip.sh`` has been run and a suitable ``pip/setuptools`` is available.
-
-# If ``TOP_DIR`` is set we're being sourced rather than running stand-alone
-# or in a sub-shell
-if [[ -z "$TOP_DIR" ]]; then
-
-    set -o errexit
-    set -o nounset
-
-    # Keep track of the DevStack directory
-    TOP_DIR=$(cd $(dirname "$0")/.. && pwd)
-    FILES=$TOP_DIR/files
-
-    # Import common functions
-    source $TOP_DIR/functions
-
-    GetDistro
-
-    source $TOP_DIR/stackrc
-
-    trap err_trap ERR
-
-fi
-
-# Get additional packages to build
-MORE_PACKAGES="$@"
-
-# Exit on any errors so that errors don't compound
-function err_trap {
-    local r=$?
-    set +o xtrace
-
-    rm -rf $TMP_VENV_PATH
-
-    exit $r
-}
-
-# Get system prereqs
-install_package $(get_packages devlibs)
-
-# Get a modern ``virtualenv``
-pip_install virtualenv
-
-# Prepare the workspace
-TMP_VENV_PATH=$(mktemp -d tmp-venv-XXXX)
-virtualenv $TMP_VENV_PATH
-
-# Install modern pip and wheel
-PIP_VIRTUAL_ENV=$TMP_VENV_PATH pip_install -U pip wheel
-
-# BUG: cffi has a lot of issues. It has no stable ABI, if installed
-# code is built with a different ABI than the one that's detected at
-# load time, it tries to compile on the fly for the new ABI in the
-# install location (which will probably be /usr and not
-# writable). Also cffi is often included via setup_requires by
-# packages, which have different install rules (allowing betas) than
-# pip has.
-#
-# Because of this we must pip install cffi into the venv to build
-# wheels.
-PIP_VIRTUAL_ENV=$TMP_VENV_PATH pip_install_gr cffi
-
-# ``VENV_PACKAGES`` is a list of packages we want to pre-install
-VENV_PACKAGE_FILE=$FILES/venv-requirements.txt
-if [[ -r $VENV_PACKAGE_FILE ]]; then
-    VENV_PACKAGES=$(grep -v '^#' $VENV_PACKAGE_FILE)
-fi
-
-for pkg in ${VENV_PACKAGES,/ } ${MORE_PACKAGES}; do
-    $TMP_VENV_PATH/bin/pip wheel $pkg
-done
-
-# Clean up wheel workspace
-rm -rf $TMP_VENV_PATH