Removes nova from requirements.txt

Removes nova from the requirements.txt and instead
add tools\tox_install.sh file, which takes care of
installing nova. This is useful for Jenkins, as it
needs nova in order to run its tests.

Change-Id: Ia81a49b2cd35a17edfe5edab35bef42191c7f4af

requirements.txt

@@ -14,4 +14,3 @@ oslo.utils>=3.4.0 # Apache-2.0
 oslo.i18n>=2.1.0 # Apache-2.0
 
 eventlet>=0.18.2 # MIT
--e git+http://github.com/openstack/nova.git#egg=nova

tools/tox_install.sh

@@ -0,0 +1,41 @@
+#!/bin/sh
+
+# compute-hyperv repo depends on nova, which doesn't exist on pypi.
+
+# This wrapper for tox's package installer will use the existing package
+# if it exists, else use zuul-cloner if that program exists, else grab it
+# from nova master via a hard-coded URL. That last case should only
+# happen with devs running unit tests locally.
+
+# From the tox.ini config page:
+# install_command=ARGV
+# default:
+# pip install {opts} {packages}
+
+ZUUL_CLONER=/usr/zuul-env/bin/zuul-cloner
+nova_installed=$(echo "import nova" | python 2>/dev/null ; echo $?)
+
+set -e
+
+if [ $nova_installed -eq 0 ]; then
+    echo "ALREADY INSTALLED" > /tmp/tox_install.txt
+    echo "Nova already installed; using existing package"
+elif [ -x "$ZUUL_CLONER" ]; then
+    export ZUUL_BRANCH=${ZUUL_BRANCH-$BRANCH}
+    echo "ZUUL CLONER" > /tmp/tox_install.txt
+    cwd=$(/bin/pwd)
+    cd /tmp
+    $ZUUL_CLONER --cache-dir \
+        /opt/git \
+        git://git.openstack.org \
+        openstack/nova
+    cd openstack/nova
+    pip install -e .
+    cd "$cwd"
+else
+    echo "PIP HARDCODE" > /tmp/tox_install.txt
+    pip install -U -egit+https://git.openstack.org/openstack/nova#egg=nova
+fi
+
+pip install -U $*
+exit $?

tox.ini

@@ -8,7 +8,7 @@ usedevelop = True
 # tox is silly... these need to be separated by a newline....
 whitelist_externals = bash
                       find
-install_command = pip install --allow-external -U --force-reinstall {opts} {packages}
+install_command = {toxinidir}/tools/tox_install.sh {opts} {packages}
 # Note the hash seed is set to 0 until hyperv can be tested with a
 # random hash seed successfully.
 setenv = VIRTUAL_ENV={envdir}