Avoid git clone in integration test

Allow script to be called with a third argument which is a path to a
checked out directory. This allows setting up the repo externally using
zuul-cloner in the infra script and allows usage of depends-on.

Simplify the script a bit, we can remove the special handling for file
and also do not need to give a default argument, this is called from
tox.

Change-Id: I3b6180b6b274966de63fe281021ff9f4186a929b
Needed-By: I828c1875e5f008fa55b693ad210421794395f623

integration-test/test.sh

@@ -1,32 +1,46 @@
 #!/bin/bash
 
-# Usage: test.sh openstack keystone
+# Usage: test.sh openstack keystone path-to-repo
+# path-to-repo is an optional parameter, if it exists
+# no cloning will happen and the local directory will be used,
+# the first two parameter get ignored.
 # Note: you can clone from a local file with REPO_ROOT=file:////~/path/to/repo
+
 set -x
 set -e
 
 REPO_ROOT=${REPO_ROOT:-git://git.openstack.org}
-if [[ -z "$2" ]]; then
-    org=openstack
-    project=nova
+
+if [[ $# -lt 2 ]] ; then
+    echo "Script needs at least two arguments:"
+    echo "$0 organization name [path-to-repo]"
+    exit 1
+fi
+org=$1
+project=$2
+
+if [[ $# -eq 3 ]] ; then
+    projectdir=$3
+    clone=0
 else
-    org=$1
-    project=$2
+    projectdir=$project
+    clone=1
 fi
 
-tempdir="$(mktemp -d)"
+if [ "$clone" = "1" ] ; then
 
-pushd $tempdir
-    if [[ $REPO_ROOT  == file://* ]]; then
-        git clone $REPO_ROOT/$org/$project
-    else
-        git clone $REPO_ROOT/$org/$project --depth=1
-    fi
+    tempdir="$(mktemp -d)"
 
-    pushd $project
-        set +e
-        flake8 --select H --statistics
-    popd
+    trap "rm -rf $tempdir" EXIT
+    pushd $tempdir
+    git clone $REPO_ROOT/$org/$project --depth=1
+fi
+
+pushd $projectdir
+set +e
+flake8 --select H --statistics
 popd
 
-rm -rf $tempdir
+if [ "$clone" = "1" ] ; then
+    popd
+fi