Use temporary directory for neutron install

Do not install in /tmp/openstack/neutron and leave the git repository
there after the script is run - if zuul-cloner is used.

We run jobs on long lived workers and also on developers machines, let's
cleanup afterwards.

Install into a temporary directory that can be removed with "git clean"
afterwards. Add this directory to ignore list of pep8.

Simplify with using pushd/popd which are bash features, so change
she-bang.

Also, remove setup of ZUUL_BRANCH, this is not needed with current zuul
anymore.

Move over some changes from neutron-lbaas so that these two are in sync.

Change-Id: I894cf28910c0969a8f7920f5b34c34ca0d5658b2

tools/tox_install.sh

@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/usr/bin/env bash
 
 # Many of neutron's repos suffer from the problem of depending on neutron,
 # but it not existing on pypi.
@@ -8,9 +8,14 @@
 # from neutron 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
-neutron_installed=$(echo "import neutron" | python 2>/dev/null ; echo $?)
 BRANCH_NAME=master
+neutron_installed=$(echo "import neutron" | python 2>/dev/null ; echo $?)
 
 set -e
 
@@ -22,8 +27,12 @@ if [ $neutron_installed -eq 0 ]; then
     echo "Neutron already installed; using existing package"
 elif [ -x "$ZUUL_CLONER" ]; then
     echo "ZUUL CLONER" > /tmp/tox_install.txt
-    cwd=$(/bin/pwd)
-    cd /tmp
+    # Make this relative to current working directory so that
+    # git clean can remove it. We cannot remove the directory directly
+    # since it is reference after $install_cmd -e.
+    mkdir -p .tmp
+    NEUTRON_DIR=$(/bin/mktemp -d -p $(pwd)/.tmp)
+    pushd $NEUTRON_DIR
     $ZUUL_CLONER --cache-dir \
         /opt/git \
         --branch $BRANCH_NAME \
@@ -31,10 +40,13 @@ elif [ -x "$ZUUL_CLONER" ]; then
         openstack/neutron
     cd openstack/neutron
     $install_cmd -e .
-    cd "$cwd"
+    popd
 else
     echo "PIP HARDCODE" > /tmp/tox_install.txt
-    $install_cmd -U -egit+https://git.openstack.org/openstack/neutron@$BRANCH_NAME#egg=neutron
+    if [ -z "$NEUTRON_PIP_LOCATION" ]; then
+        NEUTRON_PIP_LOCATION="git+https://git.openstack.org/openstack/neutron@$BRANCH_NAME#egg=neutron"
+    fi
+    $install_cmd -U -e ${NEUTRON_PIP_LOCATION}
 fi
 
 $install_cmd -U $*

tox.ini

@@ -89,7 +89,7 @@ commands = python setup.py build_sphinx
 # N530 direct neutron imports not allowed
 ignore = E125,E126,E128,E129,E265,H404,H405,N530
 show-source = true
-exclude = .venv,.git,.tox,dist,doc,*lib/python*,*egg,build,tools,.ropeproject,rally-scenarios
+exclude = .venv,.git,.tox,dist,doc,*lib/python*,.tmp,*egg,build,tools,.ropeproject,rally-scenarios
 
 [testenv:pylint]
 deps =