start

#!/usr/bin/env bash

set -e

# NOTE: The canonical source for this file is in the metabase/metabase repository.
# Please update it there then copy to the metabase/metabase-deploy repository.

# Translate various Heroku environment variables to Metabase equivalents

if [ "$PORT" ]; then
    export MB_JETTY_PORT="$PORT"
fi

# Heroku Postgres
if [ "$DATABASE_URL" ]; then
    if [[ $string == *"?"* ]]; then
        # if DATABASE_URL already has a query string don't mess with it
        export MB_DB_CONNECTION_URI="$DATABASE_URL"
    else
        # otherwise add the SSL parameters to ensure upgraded databases work on Heroku
        export MB_DB_CONNECTION_URI="$DATABASE_URL?ssl=true&sslmode=require&sslfactory=org.postgresql.ssl.NonValidatingFactory"
    fi
fi

# Mailgun (Heroku)
if [ "$MAILGUN_SMTP_LOGIN" ]; then
    export MB_EMAIL_SMTP_HOST="$MAILGUN_SMTP_SERVER"
    export MB_EMAIL_SMTP_PORT="$MAILGUN_SMTP_PORT"
    export MB_EMAIL_SMTP_USERNAME="$MAILGUN_SMTP_LOGIN"
    export MB_EMAIL_SMTP_PASSWORD="$MAILGUN_SMTP_PASSWORD"
fi

# SendGrid (Heroku)
if [ "$SENDGRID_USERNAME" ]; then
    export MB_EMAIL_SMTP_HOST="smtp.sendgrid.net"
    export MB_EMAIL_SMTP_PORT="587"
    export MB_EMAIL_SMTP_USERNAME="$SENDGRID_USERNAME"
    export MB_EMAIL_SMTP_PASSWORD="$SENDGRID_PASSWORD"
    export MB_EMAIL_SMTP_SECURITY="tls"
fi

# Mandrill (Heroku)
if [ "$MANDRILL_USERNAME" ]; then
    export MB_EMAIL_SMTP_HOST="smtp.mandrillapp.com"
    export MB_EMAIL_SMTP_PORT="587"
    export MB_EMAIL_SMTP_USERNAME="$MANDRILL_USERNAME"
    export MB_EMAIL_SMTP_PASSWORD="$MANDRILL_APIKEY"
fi

# Postmark (Heroku)
# NOTE: requires configuring sender signature for "from" address
if [ "$POSTMARK_API_TOKEN" ]; then
    export MB_EMAIL_SMTP_HOST="$POSTMARK_SMTP_SERVER"
    export MB_EMAIL_SMTP_PORT="25"
    export MB_EMAIL_SMTP_USERNAME="$POSTMARK_API_TOKEN"
    export MB_EMAIL_SMTP_PASSWORD="$POSTMARK_API_TOKEN"
    export MB_EMAIL_SMTP_SECURITY="tls"
fi

# SparkPost (Heroku)
# NOTE: requires additional configuration
if [ "$SPARKPOST_SMTP_USERNAME" ]; then
    export MB_EMAIL_SMTP_HOST="$SPARKPOST_SMTP_HOST"
    export MB_EMAIL_SMTP_PORT="$SPARKPOST_SMTP_PORT"
    export MB_EMAIL_SMTP_USERNAME="$SPARKPOST_SMTP_USERNAME"
    export MB_EMAIL_SMTP_PASSWORD="$SPARKPOST_SMTP_PASSWORD"
fi

# Determine whether we're on Heroku on a free, hobby, 1x dyno or 2x dyno
#
# We set $HEROKU in the Procfile, so we know we're on Heroku when started from the
# Procfile.
#
# We need to override the $JAVA_OPTS and give it a slightly lower memory limit
# because Heroku tends to think we can use more memory than we actually can.

if [ -n "$HEROKU" ]; then
    echo "  -> Heroku detected"
    if [ `ulimit -u` = 256 ]; then
        # free, hobby or 1x dyno, it defaults to giving us 300m but that still ends
        # up going over the 512MB limit for the dyno.
        echo "    => 1x dyno"
        JAVA_OPTS="$JAVA_OPTS -Xmx248m"                    # This seems to be the right amount that prevents the dyno from going over the quota
    fi
    if [ `ulimit -u` = 512 ]; then
        # 2x dyno, it defaults to giving us 800m but that still ends
        # up going over the 1024MB limit for the dyno.
        echo "    => 2x dyno"
        JAVA_OPTS="$JAVA_OPTS -Xmx496m"                    # This seems to be the right amount that prevents the dyno from going over the quota
    fi

    # Set a few other additional options to minimize memory usage as well.
    JAVA_OPTS="$JAVA_OPTS -XX:-UseGCOverheadLimit"         # Disable limit to amount of time spent in GC. Better slow than not working at all
    JAVA_OPTS="$JAVA_OPTS -XX:+UseConcMarkSweepGC"         # ConcMarkSweepGC seems to cause less OOM issues in my testing on low-mem Heroku envs
    JAVA_OPTS="$JAVA_OPTS -XX:+CMSClassUnloadingEnabled"   # Not 100% sure this does anything in Java 8 but if it does, we want to enable it
    JAVA_OPTS="$JAVA_OPTS -XX:+UseCompressedOops"          # Use 32-bit pointers. Reduces memory usage and GC events
    JAVA_OPTS="$JAVA_OPTS -XX:+UseCompressedClassPointers" # Same as above. See also http://blog.leneghan.com/2012/03/reducing-java-memory-usage-and-garbage.html
fi

# Other Java options
JAVA_OPTS="$JAVA_OPTS -XX:+IgnoreUnrecognizedVMOptions" # Don't barf if we see an option we don't understand (e.g. Java 9 option on Java 7/8)
JAVA_OPTS="$JAVA_OPTS -Djava.awt.headless=true"         # don't try to start AWT. Not sure this does anything but better safe than wasting memory
JAVA_OPTS="$JAVA_OPTS -Dfile.encoding=UTF-8"            # Use UTF-8

echo "Using these JAVA_OPTS: ${JAVA_OPTS}"

exec java $JAVA_OPTS -jar ./target/uberjar/metabase.jar