gnulib/check-copyright

#!/bin/sh
#
# Copyright (C) 2011-2020 Free Software Foundation, Inc.
#
# This program 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.
#
# This program 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 this program.  If not, see <https://www.gnu.org/licenses/>.
#

error=0
for module in `./gnulib-tool --list`; do
  module_license=`./gnulib-tool --extract-license $module`
  if test "$module_license" = 'GPLed build tool'; then
    module_license='GPL'
  fi
  for file in `./gnulib-tool --extract-filelist $module | grep '^\(lib\|build-aux\)/'`; do
    if grep 'GNU General Public' $file > /dev/null; then
      if grep 'version 3 or later' $file > /dev/null \
         || grep 'either version 3' $file > /dev/null; then
        file_license='GPL'
      else
        if grep 'version 2 or later' $file > /dev/null \
           || grep 'either version 2' $file > /dev/null; then
          file_license='GPLv2+'
        else
          file_license='GPL??'
        fi
      fi
    else
      if grep 'Lesser General' $file > /dev/null; then
        if grep 'version 3 or later' $file > /dev/null \
           || grep 'either version 3' $file > /dev/null; then
          file_license='LGPL'
        else
          if grep 'version 2 or later' $file > /dev/null \
             || grep 'version 2 of the License, or' $file > /dev/null \
             || grep 'version 2\.1 of the License, or' $file > /dev/null; then
            file_license='LGPLv2+'
          else
            file_license='LGPL??'
          fi
        fi
      else
        file_license='??'
      fi
    fi
    if test "$file_license" != "$module_license"; then
      if test $error = 0; then
        echo "Module License File License   File name"
        echo "============== ============== ====================================="
      fi
      printf '%-14s %-14s %s\n' "$module_license" "$file_license" "$file"
      error=1
    fi
  done
done
exit $error