lib: remove opentelemetry files and use fluent-otel-proto library instead

Signed-off-by: Eduardo Silva <[email protected]>

Author: edsiper

.gitmodules

@@ -1,3 +1,6 @@
 [submodule "lib/cfl"]
 	path = lib/cfl
 	url = https://github.com/fluent/cfl
+[submodule "lib/fluent-otel-proto"]
+	path = lib/fluent-otel-proto
+	url = https://github.com/fluent/fluent-otel-proto

CMakeLists.txt

@@ -51,6 +51,7 @@ endif()
 
 # Bundled libraries
 include(cmake/libraries.cmake)
+include(cmake/headers.cmake)
 
 # Include headers and dependency headers
 include_directories(
@@ -189,6 +190,15 @@ if (NOT CTR_HAVE_CFL)
   CTR_DEFINITION(CTR_HAVE_CFL_INTERNAL)
 endif()
 
+# fluent-otel-proto
+if (NOT CTR_HAVE_FLUENT_OTEL_PROTO)
+  include_directories(${CMAKE_CURRENT_SOURCE_DIR}/${CTR_PATH_LIB_FLUENT_OTEL_PROTO}/include)
+  CTR_OPTION(FLUENT_PROTO_EXAMPLES "off")
+  add_subdirectory(lib/fluent-otel-proto)
+  CTR_DEFINITION(CTR_HAVE_FLUENT_OTEL_PROTO)
+  CTR_DEFINITION(CTR_HAVE_FLUENT_OTEL_PROTO_INTERNAL)
+endif()
+
 # Source code
 add_subdirectory(include)
 add_subdirectory(src)

cmake/headers.cmake

@@ -0,0 +1 @@
+include_directories(${PROJECT_BINARY_DIR}/lib/fluent-otel-proto)

cmake/libraries.cmake

@@ -1,2 +1,3 @@
 # List of bundled libraries
-set(CTR_PATH_LIB_CFL        "lib/cfl")
+set(CTR_PATH_LIB_CFL               "lib/cfl")
+set(CTR_PATH_LIB_FLUENT_OTEL_PROTO "lib/fluent-otel-proto")

examples/CMakeLists.txt

@@ -4,7 +4,7 @@ set(src
 	)
 
 add_executable(ctraces-simple-c-api ${src})
-target_link_libraries(ctraces-simple-c-api ctraces-static)
+target_link_libraries(ctraces-simple-c-api ctraces-static fluent-otel-proto)
 
 # example: opentelemetry decoder -> ctrace
 set(src

examples/otlp-decoder.c

@@ -1,4 +1,5 @@
 #include <ctraces/ctraces.h>
+#include <fluent-otel-proto/fluent-otel.h>
 
 int main()
 {