[Batch]Protobuf 3 protoc generate multiple proto files

keywords: [Batch]Protobuf 3 protoc generate multiple proto files

keywords：Protobuf 3、同时生成多个proto文件、通配符

假设目录结构如下：

root
  |-proto
      |-a.proto
      |-b.proto
  |-build
  |-protoc.exe

protobuf 2.x版本，可以通过通配符指定所有proto模板文件

protoc --proto_path=./proto/ --cpp_out=dllexport_decl=LIBPROTOC_EXPORT:./build ./proto/*.proto

但是protobuf 3.x版本不识别通配符，不过可以通过BAT或者shell提供的遍历语法，来同时生成多个proto文件。

windows bat：

set dir=%cd%/proto

set out_cpp=./build

for /R %%s in (*.proto) do (
    if exist %%s protoc.exe -I=%dir% --cpp_out=%out_cpp% %%s
)

Mac and Linux (Shell):

for i in *.xls ; do 
  [[ -f "$i" ]] || continue
  xls2csv "$i" "${i%.xls}.csv"
done

Reference

How to iterate over files in a directory with Bash?
https://stackoverflow.com/questions/20796200/how-to-iterate-over-files-in-a-directory-with-bash

Linux Shell Script For Each File in a Directory Grab the filename and execute a program
https://stackoverflow.com/questions/2297510/linux-shell-script-for-each-file-in-a-directory-grab-the-filename-and-execute-a

欲无祸于昭昭，勿得罪于冥冥。----《菜根谭》