@@ -97,6 +97,111 @@ function check_python3_support_for_package_remote {

     echo $classifier

 }

+# python3_enabled_for() checks if the service(s) specified as arguments are

+# enabled by the user in ``ENABLED_PYTHON3_PACKAGES``.

+#

+# Multiple services specified as arguments are ``OR``'ed together; the test

+# is a short-circuit boolean, i.e it returns on the first match.

+#

+# Uses global ``ENABLED_PYTHON3_PACKAGES``

+# python3_enabled_for dir [dir ...]

+function python3_enabled_for {

+    local xtrace

+    xtrace=$(set +o | grep xtrace)

+    set +o xtrace

+

+    local enabled=1

+    local dirs=$@

+    local dir

+    for dir in ${dirs}; do

+        [[ ,${ENABLED_PYTHON3_PACKAGES}, =~ ,${dir}, ]] && enabled=0

+    done

+

+    $xtrace

+    return $enabled

+}

+

+# python3_disabled_for() checks if the service(s) specified as arguments are

+# disabled by the user in ``DISABLED_PYTHON3_PACKAGES``.

+#

+# Multiple services specified as arguments are ``OR``'ed together; the test

+# is a short-circuit boolean, i.e it returns on the first match.

+#

+# Uses global ``DISABLED_PYTHON3_PACKAGES``

+# python3_disabled_for dir [dir ...]

+function python3_disabled_for {

+    local xtrace

+    xtrace=$(set +o | grep xtrace)

+    set +o xtrace

+

+    local enabled=1

+    local dirs=$@

+    local dir

+    for dir in ${dirs}; do

+        [[ ,${DISABLED_PYTHON3_PACKAGES}, =~ ,${dir}, ]] && enabled=0

+    done

+

+    $xtrace

+    return $enabled

+}

+

+# enable_python3_package() adds the repositories passed as argument to the

+# ``ENABLED_PYTHON3_PACKAGES`` list, if they are not already present.

+#

+# For example:

+#   enable_python3_package nova

+#

+# Uses global ``ENABLED_PYTHON3_PACKAGES``

+# enable_python3_package dir [dir ...]

+function enable_python3_package {

+    local xtrace

+    xtrace=$(set +o | grep xtrace)

+    set +o xtrace

+

+    local tmpsvcs="${ENABLED_PYTHON3_PACKAGES}"

+    local python3

+    for dir in $@; do

+        if [[ ,${DISABLED_PYTHON3_PACKAGES}, =~ ,${dir}, ]]; then

+            warn $LINENO "Attempt to enable_python3_package ${dir} when it has been disabled"

+            continue

+        fi

+        if ! python3_enabled_for $dir; then

+            tmpsvcs+=",$dir"

+        fi

+    done

+    ENABLED_PYTHON3_PACKAGES=$(_cleanup_service_list "$tmpsvcs")

+

+    $xtrace

+}

+

+# disable_python3_package() prepares the services passed as argument to be

+# removed from the ``ENABLED_PYTHON3_PACKAGES`` list, if they are present.

+#

+# For example:

+#   disable_python3_package swift

+#

+# Uses globals ``ENABLED_PYTHON3_PACKAGES`` and ``DISABLED_PYTHON3_PACKAGES``

+# disable_python3_package dir [dir ...]

+function disable_python3_package {

+    local xtrace

+    xtrace=$(set +o | grep xtrace)

+    set +o xtrace

+

+    local disabled_svcs="${DISABLED_PYTHON3_PACKAGES}"

+    local enabled_svcs=",${ENABLED_PYTHON3_PACKAGES},"

+    local dir

+    for dir in $@; do

+        disabled_svcs+=",$dir"

+        if python3_enabled_for $dir; then

+            enabled_svcs=${enabled_svcs//,$dir,/,}

+        fi

+    done

+    DISABLED_PYTHON3_PACKAGES=$(_cleanup_service_list "$disabled_svcs")

+    ENABLED_PYTHON3_PACKAGES=$(_cleanup_service_list "$enabled_svcs")

+

+    $xtrace

+}

+

 # Wrapper for ``pip install`` to set cache and proxy environment variables

 # Uses globals ``OFFLINE``, ``PIP_VIRTUAL_ENV``,

 # ``PIP_UPGRADE``, ``TRACK_DEPENDS``, ``*_proxy``,

@@ -149,16 +254,16 @@ function pip_install {

                 # support for python3 in progress, but don't claim support

                 # in their classifier

                 echo "Check python version for : $package_dir"

-                if [[ ${package_dir##*/} == "nova" || ${package_dir##*/} == "glance" || \

-                        ${package_dir##*/} == "cinder" || ${package_dir##*/} == "swift" || \

-                        ${package_dir##*/} == "uwsgi" ]]; then

-                    echo "Using $PYTHON3_VERSION version to install $package_dir"

+                if python3_disabled_for ${package_dir##*/}; then

+                    echo "Explicitly using $PYTHON2_VERSION version to install $package_dir based on DISABLED_PYTHON3_PACKAGES"

+                elif python3_enabled_for ${package_dir##*/}; then

+                    echo "Explicitly using $PYTHON3_VERSION version to install $package_dir based on ENABLED_PYTHON3_PACKAGES"

                     sudo_pip="$sudo_pip LC_ALL=en_US.UTF-8"

                     cmd_pip=$(get_pip_command $PYTHON3_VERSION)

                 elif [[ -d "$package_dir" ]]; then

                     python_versions=$(get_python_versions_for_package $package_dir)

                     if [[ $python_versions =~ $PYTHON3_VERSION ]]; then

-                        echo "Using $PYTHON3_VERSION version to install $package_dir"

+                        echo "Automatically using $PYTHON3_VERSION version to install $package_dir based on classifiers"

                         sudo_pip="$sudo_pip LC_ALL=en_US.UTF-8"

                         cmd_pip=$(get_pip_command $PYTHON3_VERSION)

                     else

@@ -167,7 +272,7 @@ function pip_install {

                         # a warning.

                         python3_classifier=$(check_python3_support_for_package_local $package_dir)

                         if [[ ! -z "$python3_classifier" ]]; then

-                            echo "Using $PYTHON3_VERSION version to install $package_dir"

+                            echo "Automatically using $PYTHON3_VERSION version to install $package_dir based on local package settings"

                             sudo_pip="$sudo_pip LC_ALL=en_US.UTF-8"

                             cmd_pip=$(get_pip_command $PYTHON3_VERSION)

                         fi

@@ -177,7 +282,7 @@ function pip_install {

                     package=$(echo $package_dir | grep -o '^[.a-zA-Z0-9_-]*')

                     python3_classifier=$(check_python3_support_for_package_remote $package)

                     if [[ ! -z "$python3_classifier" ]]; then

-                        echo "Using $PYTHON3_VERSION version to install $package"

+                        echo "Automatically using $PYTHON3_VERSION version to install $package based on remote package settings"

                         sudo_pip="$sudo_pip LC_ALL=en_US.UTF-8"

                         cmd_pip=$(get_pip_command $PYTHON3_VERSION)

                     fi

@@ -102,9 +102,19 @@ if [[ -r $RC_DIR/.localrc.password ]]; then

     source $RC_DIR/.localrc.password

 fi

-# Control whether Python 3 should be used.

+# Control whether Python 3 should be used at all.

 export USE_PYTHON3=$(trueorfalse False USE_PYTHON3)

+# Control whether Python 3 is enabled for specific services by the

+# base name of the directory from which they are installed. See

+# enable_python3_package to edit this variable and use_python3_for to

+# test membership.

+export ENABLED_PYTHON3_PACKAGES="nova,glance,cinder,uwsgi"

+

+# Explicitly list services not to run under Python 3. See

+# disable_python3_package to edit this variable.

+export DISABLED_PYTHON3_PACKAGES=""

+

 # When Python 3 is supported by an application, adding the specific

 # version of Python 3 to this variable will install the app using that

 # version of the interpreter instead of 2.7.

new file mode 100755

@@ -0,0 +1,30 @@

+#!/usr/bin/env bash

+

+# Tests for DevStack INI functions

+

+TOP=$(cd $(dirname "$0")/.. && pwd)

+

+source $TOP/functions-common

+source $TOP/inc/python

+

+source $TOP/tests/unittest.sh

+

+echo "Testing Python 3 functions"

+

+# Initialize variables manipulated by functions under test.

+export ENABLED_PYTHON3_PACKAGES=""

+export DISABLED_PYTHON3_PACKAGES=""

+

+assert_false "should not be enabled yet" python3_enabled_for testpackage1

+

+enable_python3_package testpackage1

+assert_equal "$ENABLED_PYTHON3_PACKAGES" "testpackage1"  "unexpected result"

+assert_true "should be enabled" python3_enabled_for testpackage1

+

+assert_false "should not be disabled yet" python3_disabled_for testpackage2

+

+disable_python3_package testpackage2

+assert_equal "$DISABLED_PYTHON3_PACKAGES" "testpackage2"  "unexpected result"

+assert_true "should be disabled" python3_disabled_for testpackage2

+

+report_results