Add canonical CEL support: dev.cel.expr (rules_python approach) #69
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At the moment this fails because google/cel-spec doesn't provide python proto libraries (see https://dev.azure.com/cncf/xds/_build/results?buildId=151440&view=results): Created google/cel-spec#318 to add the support. |
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Signed-off-by: Sergii Tkachenko <[email protected]>
Signed-off-by: Sergii Tkachenko <[email protected]>
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This was referenced Nov 13, 2023
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py_proto_library provided by @com_google_protobuf//:protobuf.bzl has been deprecated for a while now: This is provided for backwards compatibility only. Bazel 5.3 will introduce support for py_proto_library, which should be used instead. https://github.com/protocolbuffers/protobuf/blob/32af7d211b85f71920acdfa9b796db008f8c2a45/protobuf.bzl#L642-L644 However, native py_proto_library has never been provided, see bazelbuild/bazel#3935. Instead @rules_python//python:proto.bzl is recommended. I attempted switching to this library, but it's not compatible with @com_google_googleapis's py_proto_library targets, see #69. I found a hacky workaround by using cc_proto_library to generate python targets, but downstream integration into Envoy failed (envoyproxy/envoy#30159). This PR migrates py_proto_library implementation to to @com_github_grpc_grpc. This implementation is used by @com_google_googleapis's, and, more importantly, uses bazel aspects. Which decouples cncf/xds and Envoy's dependencies from concrete upstream py_proto_library implementations. This resulted in a significant code improvement of bazel/api_build_system.bzl: No more custom @com_google_googleapis dependency mapping needed via py_proto_library rules override. No more hardcoded dependencies _xds_py_proto_library - proto dependency tree is determined from proto_library definitions via Basel aspects. No more EXTERNAL_PROTO_PY_BAZEL_DEP_MAP dependency map needed - for the same reason. Similar work in Envoy: envoyproxy/envoy#30834. Signed-off-by: Sergii Tkachenko <[email protected]>
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