#! /bin/sh
# SPDX-License-Identifier: Apache-2.0
#
# (c) 2019, Google
progname="${0##*/}"

USAGE="USAGE: ${progname} < kernel_build_error_log
       ${progname} kernel_build_error_log

Add MODULE_LICENSE to all the files.

Must be performed in the root directory."

if [ X"--help" = X"${1}" -o X"{-h}" = X"${1}" ]; then
  echo "${USAGE}" >&2
  exit
fi
INPUT=
if [ 1 = ${#} ]; then
  INPUT=${1}
  shift
fi
if [ 0 != ${#} ]; then
  echo "Unexpected Argument: ${*}" >&2
  echo >&2
  echo "${USAGE}" >&2
  exit 1
fi

convert_to_module_name() {
  echo "${1##*/}" |
    sed 's@[-_]@ @g
         s@   *@ @g
         s@^btfm @BTFM @
         s@^msm @MSM @
         s@ dma\( \|$\)@ DMA\1@g
         s@ irq\( \|$\)@ IRQ\1@g
         s@ io\( \|$\)@ I/O\1@g
         s@ mem\( \|$\)@ memory\1@g
         s@ hw\( \|$\)@ hardware\1@g
         s@ jpeg\( \|$\)@ JPEG\1@g
         s@ mgr$@ manager@
         s@ util$@ utilities@
         s@\(^\| \)a@\1A@g
         s@\(^\| \)b@\1B@g
         s@\(^\| \)c@\1C@g
         s@\(^\| \)d@\1D@g
         s@\(^\| \)e@\1E@g
         s@\(^\| \)f@\1F@g
         s@\(^\| \)g@\1G@g
         s@\(^\| \)h@\1H@g
         s@\(^\| \)i@\1I@g
         s@\(^\| \)j@\1J@g
         s@\(^\| \)k@\1K@g
         s@\(^\| \)l@\1L@g
         s@\(^\| \)m@\1M@g
         s@\(^\| \)n@\1N@g
         s@\(^\| \)o@\1O@g
         s@\(^\| \)p@\1P@g
         s@\(^\| \)q@\1Q@g
         s@\(^\| \)r@\1R@g
         s@\(^\| \)s@\1S@g
         s@\(^\| \)t@\1T@g
         s@\(^\| \)u@\1U@g
         s@\(^\| \)v@\1V@g
         s@\(^\| \)w@\1W@g
         s@\(^\| \)x@\1X@g
         s@\(^\| \)y@\1Y@g
         s@\(^\| \)z@\1Z@g'
}

sed -n \
    's/WARNING: modpost: missing MODULE_LICENSE() in \(.*\)[.]o$/\1/p' \
    ${INPUT} |
  sort -u |
  while read f; do
    F=${f}.c
    if [ ! -f "${F}" ]; then
      F=${f%${f##*/}}`echo ${f##*/} | tr -- - _`.c
      if [ ! -f "${F}" ]; then
        F=${F%.c}_core.c
        if [ ! -f "${F}" ]; then
          F=${f%${f##*/}}`echo ${f##*/} | tr _ -`.c
          if [ ! -f "${F}" ]; then
            F=${F%.c}_core.c
            if [ ! -f "${F}" ]; then
              echo WARNING: ${f}.c not found, needs a MODULE_LICENSE >&2
              continue
            fi
          fi
        fi
      fi
    fi
    if grep MODULE_LICENSE ${F} >/dev/null 2>/dev/null; then
      echo INFO: MODULE_LICENSE already present in ${F} >&2
      continue
    fi
    module="`convert_to_module_name ${f}`"
    if [ -z "${module}" ]; then
      echo ERROR: ${f} can not be converted into a module name >&2
      continue
    fi
    sed -i "\${
        a \\
\\
MODULE_LICENSE(\"GPL v2\");\\
MODULE_DESCRIPTION(\"${module}\");
      }" ${F} &&
    echo INFO: Added MODULE_LICENSE to ${F} >&2 ||
    echo ERROR: Failed to add MODULE_LICENSE to ${F} >&2
  done