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From Eric Chung <cinchu...@gmail.com>
Subject Re: Review Request 66649: Added pb2gen.sh for generating python protobuf bindings.
Date Thu, 07 Jun 2018 01:12:50 GMT

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This is an automatically generated e-mail. To reply, visit:
https://reviews.apache.org/r/66649/
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(Updated June 7, 2018, 1:12 a.m.)


Review request for mesos, Armand Grillet, Jason Lai, Kevin Klues, and Zhitao Li.


Repository: mesos


Description
-------

The current state of support for python in protoc has two serious
issues:
1. The `__init__.py` files necessary to mark a directory as a python
package aren't generated.
2. The import paths in each of the generated .py files do not reflect
the `--python_path` option passed to `protoc`.

This results in incomplete code generated, preventing it from being used
out of the box. To address this issue, we're adding a `pb2gen.sh` script
to do end-to-end code generation for python protobuf bindings: the
script generates the bindings based on what's in the `include` dir, then
postprocesses the generated code to add proper import paths and the
`__init__.py` files.


Diffs (updated)
-----

  src/python/.gitignore fee529dccf57fd24036733f4b470b7b9865a918c 
  src/python/lib/pb2gen.sh PRE-CREATION 
  src/python/lib/requirements.in 0742f3d846c99c1c4907d9628fb49845564563b2 
  support/pylint.config af25dd90cb2d467c688ea4b060dc4640040a068b 


Diff: https://reviews.apache.org/r/66649/diff/6/

Changes: https://reviews.apache.org/r/66649/diff/5-6/


Testing
-------

1. under `src/python/lib`, run `pb2gen.sh`
2. initialize and activate virtualenv: `virtualenv env && . env/bin/activate`
3. install reqs: `pip install -r requirements.in`
4. try to import modules from generated python code: `python -c 'from mesos.pb2.mesos.v1.master
import master_pb2'`


Thanks,

Eric Chung


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