#!/usr/bin/env bash

# Copyright (C) 2010 The Android Open Source Project
#
# Licensed 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.

# This script auto-generates the lists of proprietary blobs necessary to build
# the Android Open-Source Project code for a variety of hardware targets.

# It needs to be run from the root of a source tree that can repo sync,
# runs builds with and without the vendor tree, and uses the difference
# to generate the lists.

# It can optionally upload the results to a Gerrit server for review.

# WARNING: It destroys the source tree. Don't leave anything precious there.

# Caveat: this script does many full builds (2 per device). It takes a while
# to run. It's best # suited for overnight runs on multi-CPU machines
# with a lot of RAM.

# Syntax: device/common/generate-blob-lists.sh -f|--force [<server> <branch>]
#
# If the server and branch paramters are both present, the script will upload
# new files (if there's been any change) to the mentioned Gerrit server,
# in the specified branch.

if test "$1" != "-f" -a "$1" != "--force"
then
  echo This script must be run with the --force option
  exit 1
fi
shift

repo sync -j32 -n
repo sync -j32 -n
repo sync -j2 -l

DEVICES=$(for i in device/*/*/proprietary-blobs.txt ; do basename $(dirname $i) ; done)

export LC_ALL=C

ARCHIVEDIR=archive-$(date +%s)
if test -d archive-ref
then
  cp -R archive-ref $ARCHIVEDIR
else
  mkdir $ARCHIVEDIR

  . build/envsetup.sh
  for DEVICENAME in $DEVICES
  do
    rm -rf out
    lunch aosp_$DEVICENAME-user
    make -j64
    cat out/target/product/$DEVICENAME/installed-files.txt |
      cut -b 15- |
      sort -f > $ARCHIVEDIR/$DEVICENAME-with.txt
  done
  rm -rf vendor
  rm -rf hardware/qcom/gps
  for DEVICENAME in $DEVICES
  do
    rm -rf out
    lunch aosp_$DEVICENAME-user
    make -j64
    cat out/target/product/$DEVICENAME/installed-files.txt |
      cut -b 15- |
      sort -f > $ARCHIVEDIR/$DEVICENAME-without.txt
  done
fi

for DEVICENAME in $DEVICES
do
  MANUFACTURERNAME=$( find device -type d | grep ^[^/]\*/[^/]\*/$DEVICENAME\$ | cut -f 2 -d / )
  if test $(wc -l < $ARCHIVEDIR/$DEVICENAME-without.txt) != 0 -a $(wc -l < $ARCHIVEDIR/$DEVICENAME-with.txt) != 0
  then
    (
      date +"# Copyright (C) %Y The Android Open Source Project"
      echo '#'
      echo '# Licensed under the Apache License, Version 2.0 (the "License");'
      echo '# you may not use this file except in compliance with the License.'
      echo '# You may obtain a copy of the License at'
      echo '#'
      echo '#      http://www.apache.org/licenses/LICENSE-2.0'
      echo '#'
      echo '# Unless required by applicable law or agreed to in writing, software'
      echo '# distributed under the License is distributed on an "AS IS" BASIS,'
      echo '# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.'
      echo '# See the License for the specific language governing permissions and'
      echo '# limitations under the License.'
      echo
      echo '# This file is generated by device/common/generate-blob-lists.sh - DO NOT EDIT'
      echo
      comm -13 $ARCHIVEDIR/$DEVICENAME-without.txt $ARCHIVEDIR/$DEVICENAME-with.txt |
        grep -v '\.odex$'
    ) > $ARCHIVEDIR/$DEVICENAME-proprietary-blobs.txt
    cp $ARCHIVEDIR/$DEVICENAME-proprietary-blobs.txt device/$MANUFACTURERNAME/$DEVICENAME/proprietary-blobs.txt

    (
      cd device/$MANUFACTURERNAME/$DEVICENAME
      git add .
      git commit -m "$(echo -e 'auto-generated blob list for '$DEVICENAME'\n\nBug: 4295425')"
      if test "$1" != "" -a "$2" != ""
      then
        echo uploading to server $1 branch $2
        git push $1/device/$MANUFACTURERNAME/$DEVICENAME.git HEAD:refs/for/$2/autoblobs
      fi
    )
  else
    (
      cd device/$MANUFACTURERNAME/$DEVICENAME
      git commit --allow-empty -m "$(echo -e 'DO NOT SUBMIT - BROKEN BUILD\n\nBug: 4295425')"
      if test "$1" != "" -a "$2" != ""
      then
        echo uploading to server $1 branch $2
        git push $1/device/$MANUFACTURERNAME/$DEVICENAME.git HEAD:refs/for/$2/autoblobs
      fi
    )
  fi
done

if true
then
  rm -rf out/
elif ! test -d archive-ref
then
  echo * device/* |
    tr \  \\n |
    grep -v ^archive- |
    grep -v ^device$ |
    grep -v ^device/common$ |
    xargs rm -rf
fi