Avoid tox_install.sh for constraints support

We do not need tox_install.sh, pip can handle constraints itself
and install the project correctly. Thus update tox.ini and remove
the now obsolete tools/tox_install.sh file.

This follows https://review.openstack.org/#/c/508061 to remove
tools/tox_install.sh.

Change-Id: I57b7cb9aff05f4f81f02b39b603f3480943f914e

tools/tox_install.sh

@@ -1,55 +0,0 @@
-#!/usr/bin/env bash
-
-# Client constraint file contains this client version pin that is in conflict
-# with installing the client from source. We should replace the version pin in
-# the constraints file before applying it for from-source installation.
-
-ZUUL_CLONER=/usr/zuul-env/bin/zuul-cloner
-BRANCH_NAME=master
-CLIENT_NAME=python-glareclient
-requirements_installed=$(echo "import openstack_requirements" | python 2>/dev/null ; echo $?)
-
-set -e
-
-CONSTRAINTS_FILE=$1
-shift
-
-install_cmd="pip install"
-if [ $CONSTRAINTS_FILE != "unconstrained" ]; then
-
-    mydir=$(mktemp -dt "$CLIENT_NAME-tox_install-XXXXXXX")
-    localfile=$mydir/upper-constraints.txt
-    if [[ $CONSTRAINTS_FILE != http* ]]; then
-        CONSTRAINTS_FILE=file://$CONSTRAINTS_FILE
-    fi
-    curl $CONSTRAINTS_FILE -k -o $localfile
-    install_cmd="$install_cmd -c$localfile"
-
-    if [ $requirements_installed -eq 0 ]; then
-        echo "ALREADY INSTALLED" > /tmp/tox_install.txt
-        echo "Requirements already installed; using existing package"
-    elif [ -x "$ZUUL_CLONER" ]; then
-        export ZUUL_BRANCH=${ZUUL_BRANCH-$BRANCH}
-        echo "ZUUL CLONER" > /tmp/tox_install.txt
-        pushd $mydir
-        $ZUUL_CLONER --cache-dir \
-            /opt/git \
-            --branch $BRANCH_NAME \
-            git://git.openstack.org \
-            openstack/requirements
-        cd openstack/requirements
-        $install_cmd -e .
-        popd
-    else
-        echo "PIP HARDCODE" > /tmp/tox_install.txt
-        if [ -z "$REQUIREMENTS_PIP_LOCATION" ]; then
-            REQUIREMENTS_PIP_LOCATION="git+https://git.openstack.org/openstack/requirements@$BRANCH_NAME#egg=requirements"
-        fi
-        $install_cmd -U -e ${REQUIREMENTS_PIP_LOCATION}
-    fi
-
-    edit-constraints $localfile -- $CLIENT_NAME "-e file://$PWD#egg=$CLIENT_NAME"
-fi
-
-$install_cmd -U $*
-exit $?

tox.ini

@@ -5,15 +5,16 @@ skipsdist = True
 
 [testenv]
 usedevelop = True
-install_command =
-    {toxinidir}/tools/tox_install.sh {env:UPPER_CONSTRAINTS_FILE:https://git.openstack.org/cgit/openstack/requirements/plain/upper-constraints.txt} {opts} {packages}
+install_command = pip install {opts} {packages}
 setenv = VIRTUAL_ENV={envdir}
          OS_STDOUT_NOCAPTURE=False
          OS_STDERR_NOCAPTURE=False
          PYTHONHASHSEED=0
          PYTHONDONTWRITEBYTECODE = 1
 
-deps = -r{toxinidir}/requirements.txt
+deps =
+       -c{env:UPPER_CONSTRAINTS_FILE:https://git.openstack.org/cgit/openstack/requirements/plain/upper-constraints.txt}
+       -r{toxinidir}/requirements.txt
        -r{toxinidir}/test-requirements.txt
 commands = python setup.py testr --testr-args='{posargs}'