需要安装软件

#! /bin/bash
export LANG=C.UTF-8
#BASE_DIR="/Users/jiading/Documents/basepng";
#OUTPUT_DIR="/Users/jiading/Documents/output";
BASE_DIR="/Users/zhaoqidong/Downloads/漫画/16-18"
OUTPUT_DIR="/Users/zhaoqidong/Downloads/漫画/yasuode"

CUR_READ_DIR=""
CUR_WRITE_DIR=""

dopng() {

  readPng=$1
  writePng=$2
  fileName=$3
  fileName=${fileName%.*}".png"
  echo "图片: "$fileName

  #speed  1-11
  /Users/zhaoqidong/Downloads/pngquant/pngquant -f $readPng -o $writePng"/$fileName" --quality 100 --speed 1 --nofs

}

loopDir() {

  # 进入当前读取目录
  cd $1

  for file in *; do

    localReadDir=$1
    localWriteDir=$2

    if [ -d $file ]; then
      echo $file" is a dir"

      # 进入一个目录
      CUR_WRITE_DIR=$localWriteDir"/$file"

      # 创建对应新目录
      echo "创建目录："$CUR_WRITE_DIR
      mkdir $CUR_WRITE_DIR

      # 进入下一级遍历
      loopDir $localReadDir"/$file" $localWriteDir"/$file"

      # 下一级遍历完之后回到当前目录
      cd $1

    elif [ -f $file ]; then

      dopng $localReadDir"/$file" $localWriteDir "$file"

    fi

  done

}

main() {

  #,删掉旧目录
  if [ -d $OUTPUT_DIR ]; then
    echo $OUTPUT_DIR;
    echo "ouput目录已存在，立马删除"
    rm -rf $OUTPUT_DIR
  fi

  #,创建output跟目录
  mkdir $OUTPUT_DIR

  #,开始遍历读取
  CUR_READ_DIR=$BASE_DIR
  CUR_WRITE_DIR=$OUTPUT_DIR
  loopDir $CUR_READ_DIR $CUR_WRITE_DIR

  echo "=-=-=-压缩完成=-=-=-="
}

main