Separate py_grpc_library and py_proto_library. #19822
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By popular demand, we'll now be offering separate py_grpc_library and py_proto_library targets sharing the same interface as within google3. This change necessitated some modifications to how we pull in our own Python-level dependencies and how we make those available to those pulling in our project via Bazel. There is now a grpc_python_deps() Bazel workspace rule that pulls in the appropriate dependencies, which should be called from the client project's WORKSPACE file. A test has been added to the bazel/test/ directory to verify that this behavior works as intended. It's worth noting that the protobuf repository's usage of Starlark bind() caused a great deal of trouble in ensuring that we could also pull in six. This change also required a change in the way generated proto code is imported in the channelz and health-check modules, as well as in their associated tests. We were importing them two different ways, each relative. This resulted in two different module objects being imported into the process, which were incompatible. I am not sure exactly what caused this behavior to begin, as this should have been possible before this PR. As a workaround, I am simply trying two different absolute imports and using the one that works. This should function both inside and outside of Bazel environments.
gnossen
requested review from
a11r,
jtattermusch,
nicolasnoble and
vjpai
as code owners
gnossen
added
area/build
kind/enhancement
lang/Python
release notes: yes
|
Cross-reference: #19255 |
lidizheng
reviewed
Aug 5, 2019
lidizheng
approved these changes
Aug 7, 2019
nicolasnoble
approved these changes
Aug 7, 2019
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By popular demand, we'll now be offering separate py_grpc_library and
py_proto_library targets sharing the same interface as within google3.
This change necessitated some modifications to how we pull in our own
Python-level dependencies and how we make those available to folks
pulling in our project via Bazel.
There is now a grpc_python_deps() Bazel workspace rule that pulls in the
appropriate dependencies, which should be called from the client
project's WORKSPACE file. A test has been added to the bazel/test/
directory to verify that this behavior works as intended.
It's worth noting that the protobuf repository's usage of Starlark
bind() caused a great deal of trouble in ensuring that we could also
pull in six. So did bazelbuild/bazel#1550 which necessitated
the change in our dependency resolution methodology. Fingers crossed
that bazelbuild/bazel#1943 will be brought back to life in the near future.
This change also required a change in the way generated proto code is
imported in the channelz and health-check modules, as well as in their
associated tests. We were importing them two different ways, each
relative. This resulted in two different module objects being imported
into the process, which were incompatible. I am not sure exactly what
precipitated this behavior, as this should have been possible before
this PR. As a workaround, I am simply trying two different absolute
imports and using the one that works. This should function both inside
and outside of Bazel environments.