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#!/usr/bin/env bash

TRUE_REG='^([tT][rR][uU][eE]|[yY]|[yY][eE][sS]|1)$'
FALSE_REG='^([fF][aA][lL][sS][eE]|[nN]|[nN][oO]|0)$'
IS_UPGRADE=false

IS_DEBUG=${IS_DEBUG:-false}
if [[ $IS_DEBUG =~ $TRUE_REG ]]; then
    set -o xtrace
fi

IS_STRICT=${IS_STRICT:-false}
if [[ $IS_STRICT =~ $TRUE_REG ]]; then
    set -o errexit
    set -o nounset
    set -o pipefail
fi

case "$1" in
    upgrade)

    systemctl stop mattermost

    # If $1=configure and $2 is set, this is an upgrade
    if [ "$2" != "" ]; then
        IS_UPGRADE=true
    fi

    if [[ "$IS_UPGRADE" =~ $TRUE_REG ]]; then
        # Cleaning up old files
        find /opt/mattermost/ /opt/mattermost/client/ -mindepth 1 -maxdepth 1 \! \( -type d \( -path /opt/mattermost/client -o -path /opt/mattermost/client/plugins -o -path /opt/mattermost/config -o -path /opt/mattermost/logs -o -path /opt/mattermost/plugins -o -path /opt/mattermost/data -o -path /opt/mattermost/mmomni \) -prune \) -exec rm -r {} \;
    fi
    ;;
esac