chore: Add support for server-side hooks tests.

[kinyoklion]

Note

Adds a new OpenTelemetry integration for the server SDK (tracing hook) with example and tests, enables hooks in contract tests, and updates build/CI/release to support it.

• OpenTelemetry Integration (new package):
  • Adds libs/server-sdk-otel providing TracingHook (include/launchdarkly/server_side/integrations/otel/tracing_hook.hpp, src/tracing_hook.cpp) with options builder and unit tests.
  • CMake support with LD_BUILD_OTEL_SUPPORT, LD_BUILD_OTEL_FETCH_DEPS, LD_OTEL_CPP_VERSION; links against opentelemetry-cpp::api.
  • New example examples/hello-cpp-server-otel demonstrating tracing hook and OTLP exporter.
• Contract Tests (hooks):
  • Extends data model with hooks configuration and related types.
  • Implements ContractTestHook used by server test harness; registers via config and advertises evaluation-hooks and track-hooks capabilities.
• Build/CI/Release:
  • Updates scripts/build.sh to build OTel targets and fetch deps when needed.
  • Adds install_curl input to shared CI and uses it for OTel builds; sets CMAKE_PREFIX_PATH for CURL.
  • New workflow server-otel.yml to build/test OTel on Linux/macOS/Windows.
  • release-please config/manifests updated to include libs/server-sdk-otel (v0.1.0) and outputs; docs workflow supports libs/server-sdk-otel.
• CMake/Infra:
  • Root CMakeLists.txt adds LD_BUILD_OTEL_SUPPORT option and add_subdirectory(libs/server-sdk-otel); examples gated on it.
  • cmake/json.cmake switches FetchContent name to nlohmann_json to avoid target duplication.
  • README documents new OTel options.

^{Written by Cursor Bugbot for commit e62e575. This will update automatically on new commits. Configure here.}

[semgrep-code-launchdarkly]

Semgrep found 1 third-party-action-not-pinned-to-commit-sha finding:

• .github/workflows/server-otel.yml
  • L42 - Triage

An action sourced from a third-party repository on GitHub is not pinned to a full length commit SHA. Pinning an action to a full length commit SHA is currently the only way to use an action as an immutable release. Pinning to a particular SHA helps mitigate the risk of a bad actor adding a backdoor to the action's repository, as they would need to generate a SHA-1 collision for a valid Git object payload.

[cursor]

Bug: Broken Windows CMake runtime path separators

The CMake path construction for CMAKE_RUNTIME_OUTPUT_DIRECTORY_DEBUG and CMAKE_RUNTIME_OUTPUT_DIRECTORY_RELEASE within the WIN32 block is missing a path separator. This results in malformed directory paths.

libs/server-sdk-otel/tests/CMakeLists.txt#L9-L11

cpp-sdks/libs/server-sdk-otel/tests/CMakeLists.txt

Lines 9 to 11 in e62e575

	if (WIN32)
	set(CMAKE_RUNTIME_OUTPUT_DIRECTORY_DEBUG "${CMAKE_BINARY_DIR}../")
	set(CMAKE_RUNTIME_OUTPUT_DIRECTORY_RELEASE "${CMAKE_BINARY_DIR}../")

 

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