#!/usr/bin/env bash
#
# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements.  See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You under the Apache License, Version 2.0
# (the "License"); you may not use this file except in compliance with
# the License.  You may obtain a copy of the License at
#
#    http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#

# Script to check licenses on a binary tarball.
# It extracts the list of bundled jars, the NOTICE, and the LICENSE
# files. It checked that every non-bk jar bundled is mentioned in the
# LICENSE file. It checked that all jar files mentioned in NOTICE and
# LICENSE are actually bundled.

# all error fatal
set -e

TARBALL="$1"
if [ -z $TARBALL ]; then
    echo "Usage: $0 <binary-tarball>"
    exit -1
fi

TAR='tar'
unamestr=`uname`
if [[ "$unamestr" == 'Linux' ]]; then
   TAR='tar --wildcards'
fi

JARS=$(${TAR} -tf $TARBALL '*.jar' | sed 's!.*/!!' | sort)

LICENSEPATH=$(${TAR} -tf $TARBALL  | awk '/^[^\/]*\/LICENSE/')
LICENSE=$(${TAR} -O -xf $TARBALL "$LICENSEPATH")
NOTICEPATH=$(${TAR} -tf $TARBALL  | awk '/^[^\/]*\/NOTICE/')
NOTICE=$(${TAR} -O -xf $TARBALL $NOTICEPATH)
LICENSEJARS=$(echo "$LICENSE" | sed -nE 's!.*lib/(.*\.jar).*!\1!gp')
NOTICEJARS=$(echo "$NOTICE" | sed -nE 's!.*lib/(.*\.jar).*!\1!gp')

LINKEDINLICENSE=$(echo "$LICENSE" | sed -nE 's!.*(deps/[[:graph:]]*).*!\1!gp' | sed 's!\.$!!')

# errors not fatal
set +e

# this can error if there's no deps directory in tarball, we still want to continue with checks
BUNDLEDLICENSES=$(${TAR} -tf $TARBALL '*/deps/*' | sed 's!^[^/]*/!!' | grep -v /$)

EXIT=0


# Check all bundled jars are mentioned in LICENSE
for J in $JARS; do
    echo $J | grep -q "org.apache.bookkeeper"
    if [ $? == 0 ]; then
        continue
    fi

    echo $J | grep -q "org.apache.distributedlog"
    if [ $? == 0 ]; then
        continue
    fi

    echo $J | grep -q "bookkeeper-dist-server"
    if [ $? == 0 ]; then
        continue
    fi

    echo $J | grep -q "bookkeeper-dist-all"
    if [ $? == 0 ]; then
        continue
    fi

    echo $J | grep -q "bookkeeper-dist-bkctl"
    if [ $? == 0 ]; then
        continue
    fi

    echo "$LICENSE" | grep -q $J
    if [ $? != 0 ]; then
        echo $J unaccounted for in LICENSE
        EXIT=1
    fi
done

# Check all jars mentioned in LICENSE are bundled
for J in $LICENSEJARS; do
    echo "$JARS" | grep -q $J
    if [ $? != 0 ]; then
        echo $J mentioned in LICENSE, but not bundled
        EXIT=2
    fi
done

# Check all jars mentioned in NOTICE are bundled
for J in $NOTICEJARS; do
    echo "$JARS" | grep -q $J
    if [ $? != 0 ]; then
        echo $J mentioned in NOTICE, but not bundled
        EXIT=3
    fi
done

# Check all linked LICENSE files are in tarball
for L in $LINKEDINLICENSE; do
    echo "$BUNDLEDLICENSES" | grep -q $L
    if [ $? != 0 ]; then
        echo $L linked from LICENSE, but not found in tarball
        EXIT=4
    fi
done

# Check all LICENSE files bundled are linked from LICENSE
for L in $BUNDLEDLICENSES; do
    echo "$LINKEDINLICENSE" | grep -q $L
    if [ $? != 0 ]; then
        echo $L bundled, but not linked from LICENSE
        EXIT=5
    fi
done

if [ $EXIT != 0 ]; then
    echo
    echo It looks like there are issues with the LICENSE/NOTICE in $TARBALL.
    echo See https://bookkeeper.apache.org/community/licensing for details on how to fix.
fi

exit $EXIT