NDN project license boilerplate update

ndn-update-license.sh

#!/bin/bash
# https://gist.github.com/yoursunny/6297f3c70f5441213184

LICENSE_NFD='''/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
/*
 * Copyright (c) 2014-2019,  Regents of the University of California,
 *                           Arizona Board of Regents,
 *                           Colorado State University,
 *                           University Pierre & Marie Curie, Sorbonne University,
 *                           Washington University in St. Louis,
 *                           Beijing Institute of Technology,
 *                           The University of Memphis.
 *
 * This file is part of NFD (Named Data Networking Forwarding Daemon).
 * See AUTHORS.md for complete list of NFD authors and contributors.
 *
 * NFD is free software: you can redistribute it and/or modify it under the terms
 * of the GNU General Public License as published by the Free Software Foundation,
 * either version 3 of the License, or (at your option) any later version.
 *
 * NFD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
 * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
 * PURPOSE.  See the GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along with
 * NFD, e.g., in COPYING.md file.  If not, see <http://www.gnu.org/licenses/>.'''

LICENSE_NDNCXX='''/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
/*
 * Copyright (c) 2013-2019 Regents of the University of California.
 *
 * This file is part of ndn-cxx library (NDN C++ library with eXperimental eXtensions).
 *
 * ndn-cxx library is free software: you can redistribute it and/or modify it under the
 * terms of the GNU Lesser General Public License as published by the Free Software
 * Foundation, either version 3 of the License, or (at your option) any later version.
 *
 * ndn-cxx library is distributed in the hope that it will be useful, but WITHOUT ANY
 * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
 * PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more details.
 *
 * You should have received copies of the GNU General Public License and GNU Lesser
 * General Public License along with ndn-cxx, e.g., in COPYING.md file.  If not, see
 * <http://www.gnu.org/licenses/>.
 *
 * See AUTHORS.md for complete list of ndn-cxx authors and contributors.'''

LICENSE_PSYNC='''/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
/*
 * Copyright (c) 2014-2019,  The University of Memphis
 *
 * This file is part of PSync.
 * See AUTHORS.md for complete list of PSync authors and contributors.
 *
 * PSync is free software: you can redistribute it and/or modify it under the terms
 * of the GNU Lesser General Public License as published by the Free Software Foundation,
 * either version 3 of the License, or (at your option) any later version.
 *
 * PSync is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
 * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
 * PURPOSE.  See the GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License along with
 * PSync, e.g., in COPYING.md file.  If not, see <http://www.gnu.org/licenses/>.'''

LICENSE_END=' */'

if git remote show origin | grep 'NFD' > /dev/null; then
  LICENSE=$LICENSE_NFD
elif git remote show origin | grep 'ndn-cxx' > /dev/null; then
  LICENSE=$LICENSE_NDNCXX
elif git remote show origin | grep 'PSync' > /dev/null; then
  LICENSE=$LICENSE_PSYNC
  LICENSE_END=' **/'
else
  echo 'unknown project'
  exit 1
fi

function update_license {
  F=$1

  echo "$LICENSE" > $F.new
  awk '
    BEGIN {
      FS = "6175a610-db7d-4871-886e-e7931739d899"
      foundLicense = "before"
      nAuthors = 0
      nBlanksAfter = 0
    }
    foundLicense == "before" && $1 !~ /^[\/ ]\*/ {
      foundLicense = "just-after"
      print " */"
    }
    foundLicense == "before" && /\* Copyright/ {
      foundLicense = "in"
    }
    foundLicense == "in" && $1 ~ /^ \* [\\\@]author/ {
      if (nAuthors++ == 0) {
        print " *"
      }
      print
      next
    }
    foundLicense == "in" && /^ \*[\*]?\// {
      foundLicense = "just-after"
      print "'"$LICENSE_END"'"
      next
    }
    foundLicense == "just-after" && $1 == "" {
      if (++nBlanksAfter == 1) {
        print
      }
    }
    foundLicense == "just-after" && $1 != "" {
      foundLicense = "after"
    }
    foundLicense == "after" {
      print
    }
  ' $F >> $F.new
  mv $F.new $F
}

BASE=$1
if [[ -z $BASE ]]; then
  BASE=HEAD
fi

for F in $(git diff $BASE --name-only | grep -E '(\.hpp|\.cpp)$'); do
  if [[ -f $F ]]; then
    echo $F
    update_license $F
  fi
done