#!/usr/bin/env bash

set -o error

# ``prep-target`` handles the preparations for installing and configuring
# the "target" configuration of DevStack.


# Keep track of the devstack directory
GRENADE_DIR=$(cd $(dirname "$0") && pwd)

# Source params
source $GRENADE_DIR/inc/bootstrap
source $GRENADE_DIR/grenaderc

# Import common functions
source $GRENADE_DIR/functions

# Determine what system we are running on.  This provides ``os_VENDOR``,
# ``os_RELEASE``, ``os_UPDATE``, ``os_PACKAGE``, ``os_CODENAME``
# and ``DISTRO``
GetDistro

# For debugging
set -o xtrace

# System Preparation
# ==================

# Load up a copy of the downloaded images if not present
if [[ -d $BASE_RELEASE_DIR/images ]]; then
    rsync -a $BASE_RELEASE_DIR/images $TARGET_DEVSTACK_DIR/files
fi

# Get target config (stackrc grabs devstack "functions" too)
source $TARGET_DEVSTACK_DIR/stackrc

# Build a wheel cache
if [[ -n ${WHEELHOUSE:-} && ! -d ${WHEELHOUSE:-} ]]; then
    WHEELHOUSE=$WHEELHOUSE source $TARGET_DEVSTACK_DIR/tools/build_wheels.sh
fi

# Find additional Python packages for venvs
install_database_python

# Set up Screen
# =============

# Set a reasonable screen statusbar
SCREEN_HARDSTATUS=${SCREEN_HARDSTATUS:-'%{= .} %-Lw%{= .}%> %n%f %t*%{= .}%+Lw%< %-=%{g}(%{d}%H/%l%{g})'}
screen -r $SCREEN_NAME -X hardstatus alwayslastline "$SCREEN_HARDSTATUS"

# Set up needed directories
# =========================
#
# This ensures that we have a clean service status directory so that
# we know for sure if services are coming up / down when we expect
# them.
init_service_check


# Set up Logging
# ==============

# Set up logging for ``stack.sh``
# Set ``LOGFILE`` to turn on logging
# Append '.xxxxxxxx' to the given name to maintain history
# where 'xxxxxxxx' is a representation of the date the file was created
TIMESTAMP_FORMAT=${TIMESTAMP_FORMAT:-"%F-%H%M%S"}
if [[ -n "$LOGFILE" || -n "$SCREEN_LOGDIR" ]]; then
    LOGDAYS=${LOGDAYS:-7}
    CURRENT_LOG_TIME=$(date "+$TIMESTAMP_FORMAT")
fi

if [[ -n "$LOGFILE" ]]; then
    # First clean up old log files.  Use the user-specified ``LOGFILE``
    # as the template to search for, appending '.*' to match the date
    # we added on earlier runs.
    LOGDIR=$(dirname "$LOGFILE")
    LOGNAME=$(basename "$LOGFILE")
    mkdir -p $LOGDIR
    find $LOGDIR -maxdepth 1 -name $LOGNAME.\* -mtime +$LOGDAYS -exec rm {} \;
    LOGFILE=$LOGFILE.${CURRENT_LOG_TIME}
    SUMFILE=$LOGFILE.${CURRENT_LOG_TIME}.summary
fi

if [[ -n "$SCREEN_LOGDIR" ]]; then
    mkdir -p $SCREEN_LOGDIR
fi


# Retain credentials
# ==================

# Preserve accrc files for future usage
cp -a $BASE_DEVSTACK_DIR/accrc $TARGET_DEVSTACK_DIR/accrc


# Install package requirements from new devstack
# ==============================================
echo_summary "Installing package prerequisites"
FILES=$TARGET_DEVSTACK_DIR/files
source $TARGET_DEVSTACK_DIR/tools/install_prereqs.sh


# Set up requirements
# ===================

# Pull down the new global requirements repository
#
# this also pulls in new pbr which is needed because older
# releases of various libraries trigger downgrades which then
# would break, and pbr as a setup_requires can't be sanely
# minimum-versioned.
source $TARGET_DEVSTACK_DIR/lib/infra
git_clone $REQUIREMENTS_REPO $REQUIREMENTS_DIR $REQUIREMENTS_BRANCH

install_infra

# force any oslo upgrades that might be required
source $TARGET_DEVSTACK_DIR/lib/oslo
install_oslo

# Start helper services
# =====================

# Start dstat if it's in the ENABLED_SERVICES list. We really want
# this running before any services start to see what's going on when
# they start up, especially if there are failures.
source $TARGET_DEVSTACK_DIR/lib/dstat

start_dstat