#!/usr/bin/env bash

# Many of neutron's repos suffer from the problem of depending on neutron,
# but it not existing on pypi.

# This wrapper for tox's package installer will use
# the local tree in home directory if exists,
# else the existing package if it exists,
# else use zuul-cloner if that program exists,
# else grab it from project master via https://git.openstack.org/openstack,
# 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}

PROJ=$1
MOD=$2
shift 2

ZUUL_CLONER=/usr/zuul-env/bin/zuul-cloner
proj_installed=$(echo "import ${MOD}" | python 2>/dev/null ; echo $?)
BRANCH_NAME=master

set -e
set -x

CONSTRAINTS_FILE=$1
shift

install_cmd="pip install"
if [ $CONSTRAINTS_FILE != "unconstrained" ]; then
    install_cmd="$install_cmd -c$CONSTRAINTS_FILE"
fi

# Check if the project exists in Zuul V3 related locations..
if [ -d src/git.openstack.org/openstack/${PROJ} ]; then
  PROJ_INSTALLED_DIR=src/git.openstack.org/openstack/${PROJ}
elif [ -d /home/zuul/src/git.openstack.org/openstack/${PROJ} ]; then
  PROJ_INSTALLED_DIR=/home/zuul/src/git.openstack.org/openstack/${PROJ}
fi

if [ $proj_installed -eq 0 ]; then
    echo "ALREADY INSTALLED" > /tmp/tox_install-${PROJ}.txt
    location=$(python -c "import ${MOD}; print(${MOD}.__file__)")
    echo "ALREADY INSTALLED at $location"

    echo "${PROJ} already installed; using existing package"
elif [ -n "$PROJ_INSTALLED_DIR" ]; then
    # Do not clone the projects if running under zuul v3
    # Zuul v3 should get the projects from the required-projects list
    pushd $PROJ_INSTALLED_DIR
    # Install the project
    $install_cmd -e .
    popd
elif [ -x "$ZUUL_CLONER" ]; then
    echo "ZUUL CLONER" > /tmp/tox_install-${PROJ}.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 $install_cmd -e.
    mkdir -p .tmp
    PROJECT_DIR=$(/bin/mktemp -d -p $(pwd)/.tmp)
    pushd $PROJECT_DIR
    $ZUUL_CLONER --cache-dir \
        /opt/git \
        --branch ${BRANCH_NAME} \
        git://git.openstack.org \
        openstack/${PROJ}
    cd openstack/${PROJ}
    $install_cmd -e .
    popd
else
    echo "PIP HARDCODE" > /tmp/tox_install-${PROJ}.txt
    $install_cmd -U -egit+https://git.openstack.org/openstack/${PROJ}@${BRANCH_NAME}#egg=${PROJ}
fi