Unity App Size Analyzer

unitySizeAnalyzer.sh

#!/usr/bin/env bash

function dumpBundle {
  FILE=$1
  OUTDIR=$2
  LZMADIR=$3
  OUTPATH="$OUTDIR/$FILE"
  LZMAPATH="$LZMADIR/$FILE"

  mkdir -p $(dirname "$OUTPATH")
  cp "$TMP_FOLDER/$FILE" "$OUTPATH.unity3d"
  $DISUNITY extract-raw "$OUTPATH.unity3d" > /dev/null 2>&1

  CABDIR=`ls -d $OUTPATH/CAB-* 2>/dev/null`
  if [ -n "$CABDIR" ]; then
    mv $CABDIR/* "$OUTPATH/"
    rmdir "$CABDIR"
  fi

  while read line; do
    NAME=`echo $line | cut -d'|' -f6 | tr -d '[[:space:]]'`
    if [ -n "$NAME" ]; then
      ID=`echo $line | cut -d'|' -f1`
      printf -v PADDED "%06d" $ID
      CATEGORY=`echo $line | cut -d'|' -f3 | tr -d '[[:space:]]'`
      mv "$OUTPATH/$CATEGORY/$PADDED.bin" "$OUTPATH/$CATEGORY/$NAME.bin"
    fi
  done < <($DISUNITY list "$OUTPATH.unity3d" 2>/dev/null | grep "^[0-9]\+")

  rm "$OUTPATH.unity3d"

  mkdir -p $(dirname "$LZMAPATH")
  cp -r "$OUTPATH" "$LZMAPATH"
  find "$LZMAPATH" -type f -name "*.bin" -print0 | xargs -0 -n32 -P8 lzma -z9
}

function explode {
  FILE=$1
  COMPRESSED=$2

  DIR=$(dirname "$FILE")

  mkdir -p "dump/compressed/$DIR"
  dd if=/dev/zero of="dump/compressed/$FILE" bs=$COMPRESSED count=1 > /dev/null 2>&1

  if [[ $FILE =~ /((level[0-9]+)|(mainData)|(.*\.assets)|(unity default resources)|(.*\.unity3d))$ ]]; then
    dumpBundle "$FILE" dump/unbundled dump/lzma
  else
    mkdir -p "dump/unbundled/$DIR"
    mkdir -p "dump/lzma/$DIR"
    cp "$TMP_FOLDER/$FILE" "dump/unbundled/$FILE"
    cp "dump/compressed/$FILE" "dump/lzma/$FILE"
  fi
}

BASEDIR=$(dirname "$0")
DISUNITY="java -jar $BASEDIR/disunity/disunity.jar"

TMP_FOLDER=`mktemp -d -t 'unitySize'`

echo "Decompressing $1" 1>&2
unzip -q $1 -d $TMP_FOLDER

PLISTFILE=`find $TMP_FOLDER -type f -maxdepth 3 -name Info.plist`
EXENAME=`defaults read $PLISTFILE CFBundleExecutable`
EXEPATH=$(dirname "${PLISTFILE#$TMP_FOLDER/}")/$EXENAME

DISTSIZE=0
while read line; do
  DIR=`echo $line | cut -c 1`
  SIZE=`echo $line | cut -d' ' -f4`
  COMPRESSED=`echo $line | cut -d' ' -f6`
  FILE=`echo $line | cut -d' ' -f10-`

  # Exécutable encrypté
  if [ "$FILE" == "$EXEPATH" ]; then
    COMPRESSED=$SIZE
  fi

  if [ "$DIR" != "d" ]; then
    explode "$FILE" "$COMPRESSED"
  fi

  ((DISTSIZE += COMPRESSED))
done < <(zipinfo --h-tl "$1")

echo "Expected distribution size: $DISTSIZE" 1>&2

rm -rf $TMP_FOLDER

Hey Eric, thanks so much for this, I really appreciate that! :D This is going to help me a lot to on how to figure out what's heavy on my ios build ❤️ Life saver!