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protocol-buffers

How to compile all of proto file which in the specify path?

I am new to protocol Buffers. I have read the documentation and get a command to compile proto, but it only worked to compile single proto file.

protoc --proto_path=$ABSOLUTE_PATH --java_out=$OUT_SRC $MY_FILE.proto

After that, I tried to use wildcard to match all of proto files in the specified file path, but I get an error which is:

Could not make proto path relative: .proto: No such file or directory

Below is my env config

$ protoc --version
libprotoc 3.12.4

$ uname -v
#64-Ubuntu SMP Thu Jan 5 11:43:13 UTC 2023

I have tried the wildcard ,it is invalid.

protoc --proto_path=$ABSOLUTE_PATH --java_out=$OUT_SRC *.proto
Solution

  • protoc is very particular about paths.

    When you specify proto_path's, you must then specify one of the proto_path's for every *.proto reference.

    So, in your case:

    protoc \
--proto_path=${ABSOLUTE_PATH} \
--java_out=$OUT_SRC \
${ABSOLUTE_PATH}/*.proto

    Because you specified one proto_path, every subsequent *.proto reference must be explicitly reference against that path.

    As a working model, I always use --proto_path=${PWD} even if I only have a single proto (e.g. foo.proto) in the working folder:

    protoc \
--proto_path=${PWD} \
--xxx_out=... \
${PWD}/foo.proto