#!/bin/bash

curentdirname=$(basename "$PWD")
parentfulldir=$(dirname "$PWD")
gomodfile=go.mod 
pbdir=pb # 指定proto所在目录


# 判断是否有go.mod文件
if [ ! -f "$gomodfile" ]; then
    echo "No '$gomodfile' file!"
    exit 1
fi

# 从go.mod中取出工程包名
packname=`awk 'NR==1{print $2}' $gomodfile`

# 判断当前目录名是否与go.mod中的module 名称相同，不同直接提示错误
if [ "$packname" != "$curentdirname" ]; then
    echo "The module name is not the current directory! See 'go.mod'"
    exit 1
fi

# 判断是否有pb目录
if [ ! -d $pbdir ]; then
    echo "No '$pbdir' directory!"
    exit 1
fi

# 取出操作系统
OS=`uname -s`

# 将pbdir目录下所有一级目录下的所有.proto文件作统一处理并生成.pb.go文件
dir=$(ls -l $pbdir |awk '/^d/ {print $NF}')
for i in $dir
do
    cd $pbdir/$i
    # 判断是否有.proto文件
    num=$(ls *.proto 2> /dev/null | wc -l)
    if [ $num != 0 ] ; then
        if [ $OS == "Linux" ]; then
            # 替换以 package 开头的整行
            sed -i "s/^package.*$/package $i;/g" *.proto
            # 替换以 option go_package 开头的整行
            sed -i "s/^option go_package.*$/option go_package = \"$packname\/$pbdir\/$i\";/g" *.proto
        elif [ $OS == "Darwin" ]; then
            # 替换以 package 开头的整行
            sed -i '' "s/^package.*$/package $i;/g" *.proto
            # 替换以 option go_package 开头的整行
            sed -i '' "s/^option go_package.*$/option go_package = \"$packname\/$pbdir\/$i\";/g" *.proto
        else
            echo "Unsupport OS: "$OS
        fi

        protoc --go_out=$parentfulldir *.proto
    fi
    cd ../..
done

cd $pbdir
# 判断是否有.proto文件
num=$(ls *.proto 2> /dev/null | wc -l)
if [ $num != 0 ] ; then
    if [ $OS == "Linux" ]; then
        # 替换以 option go_package 开头的整行
        sed -i "s/^option go_package.*$/option go_package = \"$packname\/$pbdir\";/g" *.proto
    elif [ $OS == "Darwin" ]; then
        # 替换以 option go_package 开头的整行
        sed -i '' "s/^option go_package.*$/option go_package = \"$packname\/$pbdir\";/g" *.proto
    else
        echo "Unsupport OS: "$OS
    fi

    protoc --go_out=plugins=grpc:$parentfulldir *.proto
fi
cd ../