Make it work with devstack

To avoid the "installation from path or url cannot be constrained to
a version" issue.

Change-Id: Ia602a6509780c394b30c2f663fe1207e69706e32

test-requirements.txt

@@ -3,7 +3,6 @@
 # process, which may cause wedges in the gate later.
 
 hacking!=0.13.0,<0.14,>=0.12.0 # Apache-2.0
-http://tarballs.openstack.org/horizon/horizon-master.tar.gz#egg=horizon
 coverage!=4.4,>=4.0 # Apache-2.0
 ddt>=1.0.1 # MIT
 django-nose>=1.4.4 # BSD

tools/tox_install.sh

@@ -1,5 +1,71 @@
 #!/usr/bin/env bash
 
+# Many of horizon's repos suffer from the problem of depending on horizon,
+# but it not existing 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 horizon 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
+BRANCH_NAME=master
+
+install_project() {
+    local project=$1
+    local branch=${2:-$BRANCH_NAME}
+    local PROJECT_DIR=$HOME/$project
+
+    set +e
+    project_installed=$(echo "import $project" | python 2>/dev/null ; echo $?)
+    set -e
+
+    # The devstack based functional tests have project checked out in
+    # $PROJECT_DIR on the test systems - with the change to test in it.
+    # Use this directory if it exists, so that this script installs the
+    # project version to test here.
+    # Note that the functional tests use sudo to run tox and thus
+    # variables used for zuul-cloner to check out the correct version are
+    # lost.
+    if [ -d "$PROJECT_DIR" ]; then
+        echo "FOUND $project code at $PROJECT_DIR - using"
+        $install_cmd -U $PROJECT_DIR
+    elif [ $project_installed -eq 0 ]; then
+        echo "ALREADY INSTALLED" > /tmp/tox_install.txt
+        location=$(python -c "import $project; print($project.__file__)")
+        echo "ALREADY INSTALLED at $location"
+
+        echo "$project already installed; using existing package"
+    elif [ -x "$ZUUL_CLONER" ]; then
+        echo "ZUUL CLONER" > /tmp/tox_install.txt
+        # Make this relative to current working directory so that
+        # git clean can remove it. We cannot remove the directory directly
+        # since it is referenced after $install_cmd
+        mkdir -p .tmp
+        PROJECT_DIR=$(/bin/mktemp -d -p $(pwd)/.tmp)
+        pushd $PROJECT_DIR
+        $ZUUL_CLONER --cache-dir \
+            /opt/git \
+            --branch $branch \
+            http://git.openstack.org \
+            openstack/$project
+        cd openstack/$project
+        $install_cmd .
+        popd
+    else
+        echo "PIP HARDCODE" > /tmp/tox_install.txt
+        if [ -z "$PIP_LOCATION" ]; then
+            PIP_LOCATION="git+https://git.openstack.org/openstack/$project@$branch#egg=$project"
+        fi
+        $install_cmd -U ${PIP_LOCATION}
+    fi
+}
+
 # Client constraint file contains this client version pin that is in conflict
 # with installing the client from source. We should remove the version pin in
 # the constraints file before applying it for from-source installation.
@@ -8,6 +74,7 @@ CONSTRAINTS_FILE="$1"
 shift 1
 
 set -e
+set -x
 
 # NOTE(tonyb): Place this in the tox enviroment's log dir so it will get
 # published to logs.openstack.org for easy debugging.
@@ -26,5 +93,9 @@ pip install -c"$localfile" openstack-requirements
 # install will be constrained and we need to unconstrain it.
 edit-constraints "$localfile" -- "$CLIENT_NAME"
 
-pip install -c"$localfile" -U "$@"
+install_cmd="pip install -c$localfile"
+
+install_project horizon
+
+$install_cmd -U $*
 exit $?

tox.ini

@@ -63,4 +63,4 @@ commands = npm install
 show-source = True
 ignore = E123,E125
 builtins = _
-exclude=.venv,.git,.tox,dist,doc,*lib/python*,*egg,build,node_modules
+exclude=.venv,.git,.tox,.tmp,dist,doc,*lib/python*,*egg,build,node_modules