#!/bin/sh

set -e

# Default if not supplied - same as weave net default
IPALLOC_RANGE=${IPALLOC_RANGE:-10.32.0.0/12}
HTTP_ADDR=${WEAVE_HTTP_ADDR:-127.0.0.1:6784}
STATUS_ADDR=${WEAVE_STATUS_ADDR:-0.0.0.0:6782}
HOST_ROOT=${HOST_ROOT:-/host}
WEAVE_DIR="/host/var/lib/weave"

mkdir $WEAVE_DIR || true

echo "Starting launch.sh"

# Check if the IP range overlaps anything existing on the host
/usr/bin/weaveutil netcheck $IPALLOC_RANGE weave

STATUS=0
/usr/bin/weaveutil is-swarm-manager 2>/dev/null || STATUS=$?
if [ $STATUS -eq 0 ]; then
    IS_SWARM_MANAGER=1
elif [ $STATUS -eq 20 ]; then
    echo "Host swarm is not \"active\"; exiting." >&2
    exit 1
fi

SWARM_MANAGER_PEERS=$(/usr/bin/weaveutil swarm-manager-peers)
# Prevent from restoring from a persisted peers list
rm -f "/restart.sentinel"

router_bridge_opts() {
    echo --datapath=datapath
    [ -z "$WEAVE_MTU" ] || echo --mtu "$WEAVE_MTU"
    [ -z "$WEAVE_NO_FASTDP" ] || echo --no-fastdp
}

if [ -z "$IPALLOC_INIT" ]; then
    IPALLOC_INIT="observer"
    if [ "$IS_SWARM_MANAGER" == "1" ]; then
        IPALLOC_INIT="consensus=$(echo $SWARM_MANAGER_PEERS | wc -l)"
    fi
fi

exec /home/weave/weaver $EXTRA_ARGS --port=6783 $(router_bridge_opts) \
    --host-root=/host \
    --proc-path=/host/proc \
    --http-addr=$HTTP_ADDR --status-addr=$STATUS_ADDR \
    --no-dns \
    --ipalloc-range=$IPALLOC_RANGE \
    --ipalloc-init $IPALLOC_INIT \
    --nickname "$(hostname)" \
    --log-level=debug \
    --db-prefix="$WEAVE_DIR/weave" \
    --plugin-v2 \
    --plugin-mesh-socket='' \
    $(echo $SWARM_MANAGER_PEERS | tr '\n' ' ')