Remove durabletask-protobuf submodule and vendor the proto file

.gitattributes

@@ -0,0 +1 @@
+*.sh text eol=lf

.github/workflows/pr-validation.yml

@@ -53,7 +53,6 @@ jobs:
       - uses: actions/checkout@v4
         with:
           fetch-depth: 1
-          submodules: true
 
       - name: Setup Go environment
         uses: actions/setup-go@v5
@@ -74,7 +73,7 @@ jobs:
           go install google.golang.org/grpc/cmd/protoc-gen-go-grpc@$PROTOC_GEN_GO_GRPC
 
       - name: Generate grpc code
-        run: protoc --go_out=. --go-grpc_out=. -I ./submodules/durabletask-protobuf/protos orchestrator_service.proto
+        run: protoc --go_out=. --go-grpc_out=. -I ./vendored/durabletask-protobuf/protos orchestrator_service.proto
 
       - name: Run go vet
         run: go vet ./...

CHANGELOG.md

@@ -5,6 +5,12 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## Unreleased
+
+### Changed
+
+- Removed the `submodules/durabletask-protobuf` git submodule. The `orchestrator_service.proto` file is now vendored under `vendored/durabletask-protobuf/protos/`, with the source provenance (URL, branch/ref, commit hash) tracked in `vendored/durabletask-protobuf/PROTO_SOURCE_COMMIT_HASH` and a helper script (`vendored/durabletask-protobuf/update-proto.sh`) for refreshing the proto from upstream.
+
 ## [v0.6.0] - 2025-02-05
 
 ### Added

README.md

@@ -247,23 +247,25 @@ Note that each orchestration is represented as a single span with activities, ti
 
 ## Cloning this repository
 
-This repository contains submodules. Be sure to clone it with the option to include submodules. Otherwise you will not be able to generate the protobuf code.
+Clone the repository as you normally would:
 
 ```bash
-git clone --recurse-submodules https://github.com/microsoft/durabletask-go 
+git clone https://github.com/microsoft/durabletask-go
 ```
 
+The protocol buffer definitions used to generate the gRPC bindings are vendored under [`vendored/durabletask-protobuf/protos`](./vendored/durabletask-protobuf/protos). See [`vendored/durabletask-protobuf/README.md`](./vendored/durabletask-protobuf/README.md) for details on how to refresh them from the upstream [microsoft/durabletask-protobuf](https://github.com/microsoft/durabletask-protobuf) repository.
+
 ## Building the project
 
 This project requires go v1.19.x or greater. You can build a standalone executable by simply running `go build` at the project root.
 
 ### Generating protobuf
 
-Use the following command to regenerate the protobuf from the submodule. Use this whenever updating the submodule reference.
+Use the following command to regenerate the protobuf bindings from the vendored proto file. Use this whenever updating the proto file under [`vendored/durabletask-protobuf/protos`](./vendored/durabletask-protobuf/protos).
 
 ```bash
 # NOTE: assumes the .proto file defines: option go_package = "/internal/protos"
-protoc --go_out=. --go-grpc_out=. -I submodules/durabletask-protobuf/protos orchestrator_service.proto
+protoc --go_out=. --go-grpc_out=. -I vendored/durabletask-protobuf/protos orchestrator_service.proto
 ```
 
 ### Generating mocks for testing

vendored/durabletask-protobuf/PROTO_SOURCE_COMMIT_HASH

@@ -0,0 +1,4 @@
+Source: https://github.com/microsoft/durabletask-protobuf
+Branch: main
+Commit: 4207e1dbd14cedc268f69c3befee60fcaad19367
+URL:    https://github.com/microsoft/durabletask-protobuf/blob/4207e1dbd14cedc268f69c3befee60fcaad19367/protos/orchestrator_service.proto

vendored/durabletask-protobuf/README.md

@@ -0,0 +1,29 @@
+# Durable Task Protobuf Files
+
+This directory contains the protocol buffer definitions used by the Durable Task Framework Go SDK. The files in this directory are vendored from the [microsoft/durabletask-protobuf](https://github.com/microsoft/durabletask-protobuf) repository.
+
+## Directory Structure
+
+- `protos/` - Contains the vendored proto files
+- `PROTO_SOURCE_COMMIT_HASH` - Records the upstream source URL, branch/ref, and commit hash that the proto files were last synced from
+- `update-proto.sh` - Helper script to refresh the vendored proto file and commit hash from upstream
+
+## Updating the proto files
+
+Run the helper script from the repository root to download the latest `orchestrator_service.proto` from upstream and update `PROTO_SOURCE_COMMIT_HASH`:
+
+```bash
+# Update from the default branch (main)
+./vendored/durabletask-protobuf/update-proto.sh
+
+# Update from a specific branch, tag, or commit SHA
+./vendored/durabletask-protobuf/update-proto.sh <branch-tag-or-sha>
+```
+
+After running the script, regenerate the Go gRPC bindings so that the committed `internal/protos/*.pb.go` files match the updated `.proto`:
+
+```bash
+protoc --go_out=. --go-grpc_out=. -I ./vendored/durabletask-protobuf/protos orchestrator_service.proto
+```
+
+Commit the updated proto file, `PROTO_SOURCE_COMMIT_HASH`, and the regenerated `.pb.go` files together.