#!/usr/bin/env python3
# This file acts as a drop-in replacement of binary protoc.exe.
# It will use either Python-based protoc from grpcio-tools package,
# or if it is not available, protoc.exe from path if found.

import sys
import os
import os.path
from nanopb_generator import invoke_protoc

if __name__ == '__main__':
    # Get path of the directory where this script is stored.
    if getattr(sys, 'frozen', False):
        mypath = os.path.dirname(sys.executable) # For pyInstaller
    else:
        mypath = os.path.dirname(__file__)

    # Avoid recursive calls to self
    env_paths = os.environ["PATH"].split(os.pathsep)
    if mypath in env_paths:
        env_paths.remove(mypath)
        os.environ["PATH"] = os.pathsep.join(env_paths)

    # Add argument for finding the nanopb generator when using --nanopb_out=
    # argument to protoc.
    if os.path.isfile(os.path.join(mypath, "protoc-gen-nanopb.exe")):
        protoc_gen_nanopb = os.path.join(mypath, "protoc-gen-nanopb.exe")
    elif os.name == 'nt':
        protoc_gen_nanopb = os.path.join(mypath, "protoc-gen-nanopb.bat")
    else:
        protoc_gen_nanopb = os.path.join(mypath, "protoc-gen-nanopb")

    args = sys.argv[1:]

    if os.path.isfile(protoc_gen_nanopb):
         args = ['--plugin=protoc-gen-nanopb=%s' % protoc_gen_nanopb] + args

    status = invoke_protoc(['protoc'] + args)
    sys.exit(status)