zuul v3 gate changes

This patch updates our tox_install_project.sh script to account for zuul
v3 changes. The changes are made to be backwards compatible so the
script should also still work with zuul v2 jobs. Also see the depends on
patch for the project-config changes needed for our zuul v3 support.

Depends-On: Icd0dfdef3486be95ef45beb9ea96767f731d9e9e

Change-Id: Ic0d25e9f9e6d1fe7cba7cae93e66dbbc08c12071

tools/tox_install_project.sh

@@ -20,6 +20,7 @@ shift 2
 ZUUL_CLONER=/usr/zuul-env/bin/zuul-cloner
 neutron_installed=$(echo "import ${MOD}" | python 2>/dev/null ; echo $?)
 BRANCH_NAME=master
+PROJ_DIR=${HOME}/src/git.openstack.org/openstack/${PROJ}
 
 set -e
 
@@ -31,10 +32,14 @@ if [ $CONSTRAINTS_FILE != "unconstrained" ]; then
     install_cmd="$install_cmd -c$CONSTRAINTS_FILE"
 fi
 
-if [ $neutron_installed -eq 0 ]; then
+if [ -d "$PROJ_DIR" ]; then
+    echo "FOUND code at $PROJ_DIR - using"
+    $install_cmd -U -e ${PROJ_DIR}
+elif [ $neutron_installed -eq 0 ]; then
     echo "ALREADY INSTALLED" > /tmp/tox_install-${PROJ}.txt
     echo "${PROJ} already installed; using existing package"
 elif [ -x "$ZUUL_CLONER" ]; then
+    echo "${PROJ} not installed; using zuul cloner"
     echo "ZUUL CLONER" > /tmp/tox_install-${PROJ}.txt
     cwd=$(/bin/pwd)
     cd /tmp
@@ -47,6 +52,7 @@ elif [ -x "$ZUUL_CLONER" ]; then
     $install_cmd -e .
     cd "$cwd"
 else
+    echo "${PROJ} not installed; using egg"
     echo "PIP HARDCODE" > /tmp/tox_install-${PROJ}.txt
     $install_cmd -U -egit+https://git.openstack.org/openstack/${PROJ}@${BRANCH_NAME}#egg=${PROJ}
 fi