#!/bin/bash
# -----------------------------------------------------------------------------
# Runs the custom version of Buck required by ONOS.
# -----------------------------------------------------------------------------

set -e

BUCK_URL="https://github.com/bocon13/buck/releases/download/v2016.04.08.01/buck"
BUCK_SHA="e22b6accd43cd3e928fe8e63256ebdc8f0b24cab"
REQUIRED_VERSION="buck version ad0295088e5da2782062636ed97bd4f71c65bddd"

[  "-U" = "$1" ] && shift && FORCE_UPDATE=True

mkdir -p $ONOS_ROOT/bin
pushd $ONOS_ROOT/bin > /dev/null

if [ -n "$FORCE_UPDATE" ] || [ ! -f "buck" ] || [ "$REQUIRED_VERSION" != "$(cat .buck_version)" ]; then
    echo "Downloading Buck..."
    rm -f .buck_version buck
    curl -o ./buck -L $BUCK_URL
    if [ -n "$(which shasum)" ]; then
        SHA=$(shasum ./buck | cut -d' ' -f1)
        [ "$SHA" != "$BUCK_SHA" ] &&
           echo "ERROR: Downloaded SHA ($SHA) does not match expected SHA ($BUCK_SHA)" &&
           exit 1
    else
        echo "SHA cannot be verified"
    fi
    chmod 555 ./buck
    echo $(./buck --version 2>/dev/null) > .buck_version
    chmod 444 .buck_version
    rm -rf ./buck-out
    printf "Successfully downloaded Buck to $ONOS_ROOT/bin/buck\n\n"
fi
popd > /dev/null

# Finally, run the Buck command...
$ONOS_ROOT/bin/buck "$@"