Merge branch 'main' into refactor-urlparser

.github/workflows/ci.yml

@@ -876,9 +876,9 @@ jobs:
         CXX: /usr/bin/g++-10
       run: ./ci/do_ci.sh code.coverage
     - name: upload report
-      uses: codecov/codecov-action@v4
+      uses: codecov/codecov-action@v5
       with:
-        file: /home/runner/build/coverage.info
+        files: /home/runner/build/coverage.info
 
   markdown-lint:
     runs-on: ubuntu-latest

.github/workflows/clang-tidy.yaml

@@ -46,9 +46,8 @@ jobs:
           CC: clang
           CXX: clang++
         run: |
-          mkdir -p build && cd build
           echo "Running cmake..."
-          cmake .. \
+          cmake -B build \
             -DCMAKE_CXX_STANDARD=14 \
             -DWITH_STL=CXX14 \
             -DWITH_OTLP_HTTP=ON \
@@ -62,23 +61,21 @@ jobs:
             -DBUILD_W3CTRACECONTEXT_TEST=ON \
             -DWITH_METRICS_EXEMPLAR_PREVIEW=ON \
             -DWITH_ASYNC_EXPORT_PREVIEW=ON \
-            -DCMAKE_EXPORT_COMPILE_COMMANDS=ON \
-            -DCMAKE_CXX_CLANG_TIDY="clang-tidy"
+            -DCMAKE_EXPORT_COMPILE_COMMANDS=ON
 
       - name: Run clang-tidy
         run: |
-          cd build
-          make 2>&1 | tee -a clang-tidy.log || exit 1
+          cmake --build build --target opentelemetry_proto
+          jq -r .[].file build/compile_commands.json | grep -vE '/(generated|third_party)/' | xargs -P $(nproc) -n 1 clang-tidy --quiet -p build 2>&1 | tee -a clang-tidy.log
 
       - uses: actions/upload-artifact@v4
         with:
           name: Logs (clang-tidy)
-          path: ./build/clang-tidy.log
+          path: ./clang-tidy.log
 
       - name: Count warnings
         run: |
-          cd build
           COUNT=$(grep -c "warning:" clang-tidy.log)
           echo "clang-tidy reported ${COUNT} warning(s)"
 
-# TODO: include WITH_OTLP_GRPC and WITH_ABSEIL flags.
+# TODO: include WITH_OTLP_GRPC and WITH_ABSEIL flags.

.github/workflows/cppcheck.yml

@@ -0,0 +1,62 @@
+
+name: cppcheck
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+
+jobs:
+  cppcheck:
+    runs-on: ubuntu-24.04
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          submodules: 'recursive'
+
+      - name: Set up dependencies
+        run: |
+          sudo apt update -y
+          sudo apt install -y cppcheck
+
+      - name: Run cppcheck
+        run: |
+          cppcheck --version | tee cppcheck.log
+          cppcheck \
+            --force \
+            --enable=warning,performance,portability \
+            --inline-suppr \
+            --suppress=unknownMacro:exporters/etw/include/opentelemetry/exporters/etw/TraceLoggingDynamic.h \
+            --language=c++ \
+            --std=c++14 \
+            -I api/include \
+            -I exporters/elasticsearch/include \
+            -I exporters/etw/include \
+            -I exporters/memory/include \
+            -I exporters/ostream/include \
+            -I exporters/otlp/include \
+            -I exporters/prometheus/include \
+            -I exporters/zipkin/include \
+            -I ext/include \
+            -I opentracing-shim/include \
+            -I sdk/include \
+            -i build \
+            -i test \
+            -i third_party \
+            -j $(nproc) \
+            . 2>&1 | tee --append cppcheck.log
+
+      - uses: actions/upload-artifact@v4
+        if: success() || failure()
+        with:
+          name: Logs (cppcheck)
+          path: ./cppcheck.log
+
+      - name: Count warnings
+        run: |
+          set +e
+          COUNT=`grep -c -E "\[.+\]" cppcheck.log`
+          echo "cppcheck reported ${COUNT} warning(s)"
+          # TODO: uncomment to enforce failing the build
+          # if [ $COUNT -ne 0 ] ; then exit 1 ; fi

CHANGELOG.md

@@ -27,6 +27,9 @@ Increment the:
 * [SEMANTIC CONVENTIONS] Migration to weaver
   [#3105](https://github.com/open-telemetry/opentelemetry-cpp/pull/3105)
 
+* [EXPORTER] Allow to share gRPC clients between OTLP exporters.
+  [#3041](https://github.com/open-telemetry/opentelemetry-cpp/pull/3041)
+
 Important changes:
 
 * [API] Jaeger Propagator should not be deprecated

CMakeLists.txt

@@ -389,14 +389,8 @@ if(WITH_OTLP_GRPC
    OR WITH_OTLP_HTTP
    OR WITH_OTLP_FILE)
   find_package(Protobuf)
-  if(Protobuf_VERSION AND Protobuf_VERSION VERSION_GREATER_EQUAL "3.22.0")
-    if(NOT WITH_ABSEIL)
-      message(
-        FATAL_ERROR
-          "Protobuf 3.22 or upper require abseil-cpp(Recommended version: 20230125 or upper)"
-      )
-    endif()
-  endif()
+  # Protobuf 3.22 or upper require abseil-cpp, we can find it in
+  # opentelemetry-cpp-config.cmake
 
   if(WITH_OTLP_GRPC)
     find_package(gRPC)

api/include/opentelemetry/nostd/internal/absl/README.md

@@ -1,4 +1,4 @@
 # Notes on Abseil Variant implementation
 
-This is a snapshot of Abseil Variant `absl::variant` from Abseil
-`v2020-03-03#8`.
+This is a snapshot of Abseil Variant
+`absl::OTABSL_OPTION_NAMESPACE_NAME::variant` from Abseil `v2020-03-03#8`.

api/include/opentelemetry/nostd/internal/absl/base/config.h

@@ -84,7 +84,7 @@
 // namespace absl {
 // OTABSL_NAMESPACE_BEGIN
 //
-// void Foo();  // absl::Foo().
+// void Foo();  // absl::OTABSL_OPTION_NAMESPACE_NAME::Foo().
 //
 // OTABSL_NAMESPACE_END
 // }  // namespace absl
@@ -94,40 +94,32 @@
 // not support forward declarations of its own types, nor does it support
 // user-provided specialization of Abseil templates.  Code that violates these
 // rules may be broken without warning.)
-#if !defined(OTABSL_OPTION_USE_INLINE_NAMESPACE) || \
-    !defined(OTABSL_OPTION_INLINE_NAMESPACE_NAME)
+#if !defined(OTABSL_OPTION_NAMESPACE_NAME)
 #error options.h is misconfigured.
 #endif
 
-// Check that OTABSL_OPTION_INLINE_NAMESPACE_NAME is neither "head" nor ""
-#if defined(__cplusplus) && OTABSL_OPTION_USE_INLINE_NAMESPACE == 1
+// Check that OTABSL_OPTION_NAMESPACE_NAME is neither "head" nor ""
+#if defined(__cplusplus)
 
 #define OTABSL_INTERNAL_INLINE_NAMESPACE_STR \
-  OTABSL_INTERNAL_TOKEN_STR(OTABSL_OPTION_INLINE_NAMESPACE_NAME)
+  OTABSL_INTERNAL_TOKEN_STR(OTABSL_OPTION_NAMESPACE_NAME)
 
 static_assert(OTABSL_INTERNAL_INLINE_NAMESPACE_STR[0] != '\0',
-              "options.h misconfigured: OTABSL_OPTION_INLINE_NAMESPACE_NAME must "
+              "options.h misconfigured: OTABSL_OPTION_NAMESPACE_NAME must "
               "not be empty.");
 static_assert(OTABSL_INTERNAL_INLINE_NAMESPACE_STR[0] != 'h' ||
                   OTABSL_INTERNAL_INLINE_NAMESPACE_STR[1] != 'e' ||
                   OTABSL_INTERNAL_INLINE_NAMESPACE_STR[2] != 'a' ||
                   OTABSL_INTERNAL_INLINE_NAMESPACE_STR[3] != 'd' ||
                   OTABSL_INTERNAL_INLINE_NAMESPACE_STR[4] != '\0',
-              "options.h misconfigured: OTABSL_OPTION_INLINE_NAMESPACE_NAME must "
+              "options.h misconfigured: OTABSL_OPTION_NAMESPACE_NAME must "
               "be changed to a new, unique identifier name.");
 
 #endif
 
-#if OTABSL_OPTION_USE_INLINE_NAMESPACE == 0
-#define OTABSL_NAMESPACE_BEGIN
-#define OTABSL_NAMESPACE_END
-#elif OTABSL_OPTION_USE_INLINE_NAMESPACE == 1
-#define OTABSL_NAMESPACE_BEGIN \
-  inline namespace OTABSL_OPTION_INLINE_NAMESPACE_NAME {
+
+#define OTABSL_NAMESPACE_BEGIN namespace OTABSL_OPTION_NAMESPACE_NAME {
 #define OTABSL_NAMESPACE_END }
-#else
-#error options.h is misconfigured.
-#endif
 
 // -----------------------------------------------------------------------------
 // Compiler Feature Checks
@@ -217,7 +209,7 @@ static_assert(OTABSL_INTERNAL_INLINE_NAMESPACE_STR[0] != 'h' ||
 
 // OTABSL_HAVE_SOURCE_LOCATION_CURRENT
 //
-// Indicates whether `absl::SourceLocation::current()` will return useful
+// Indicates whether `absl::OTABSL_OPTION_NAMESPACE_NAME::SourceLocation::current()` will return useful
 // information in some contexts.
 #ifndef OTABSL_HAVE_SOURCE_LOCATION_CURRENT
 #if OTABSL_INTERNAL_HAS_KEYWORD(__builtin_LINE) && \
@@ -570,7 +562,7 @@ static_assert(OTABSL_INTERNAL_INLINE_NAMESPACE_STR[0] != 'h' ||
 
 // OTABSL_USES_STD_ANY
 //
-// Indicates whether absl::any is an alias for std::any.
+// Indicates whether absl::OTABSL_OPTION_NAMESPACE_NAME::any is an alias for std::any.
 #if !defined(OTABSL_OPTION_USE_STD_ANY)
 #error options.h is misconfigured.
 #elif OTABSL_OPTION_USE_STD_ANY == 0 || \
@@ -585,7 +577,7 @@ static_assert(OTABSL_INTERNAL_INLINE_NAMESPACE_STR[0] != 'h' ||
 
 // OTABSL_USES_STD_OPTIONAL
 //
-// Indicates whether absl::optional is an alias for std::optional.
+// Indicates whether absl::OTABSL_OPTION_NAMESPACE_NAME::optional is an alias for std::optional.
 #if !defined(OTABSL_OPTION_USE_STD_OPTIONAL)
 #error options.h is misconfigured.
 #elif OTABSL_OPTION_USE_STD_OPTIONAL == 0 || \
@@ -600,7 +592,7 @@ static_assert(OTABSL_INTERNAL_INLINE_NAMESPACE_STR[0] != 'h' ||
 
 // OTABSL_USES_STD_VARIANT
 //
-// Indicates whether absl::variant is an alias for std::variant.
+// Indicates whether absl::OTABSL_OPTION_NAMESPACE_NAME::variant is an alias for std::variant.
 #if !defined(OTABSL_OPTION_USE_STD_VARIANT)
 #error options.h is misconfigured.
 #elif OTABSL_OPTION_USE_STD_VARIANT == 0 || \
@@ -615,7 +607,7 @@ static_assert(OTABSL_INTERNAL_INLINE_NAMESPACE_STR[0] != 'h' ||
 
 // OTABSL_USES_STD_STRING_VIEW
 //
-// Indicates whether absl::string_view is an alias for std::string_view.
+// Indicates whether absl::OTABSL_OPTION_NAMESPACE_NAME::string_view is an alias for std::string_view.
 #if !defined(OTABSL_OPTION_USE_STD_STRING_VIEW)
 #error options.h is misconfigured.
 #elif OTABSL_OPTION_USE_STD_STRING_VIEW == 0 || \
@@ -650,15 +642,10 @@ static_assert(OTABSL_INTERNAL_INLINE_NAMESPACE_STR[0] != 'h' ||
 // the proper count to skip past the CCTZ fork namespace names.  (This number
 // is one larger when there is an inline namespace name to skip.)
 #if defined(_MSC_VER)
-#if OTABSL_OPTION_USE_INLINE_NAMESPACE == 0
-#define OTABSL_INTERNAL_MANGLED_NS "absl"
-#define OTABSL_INTERNAL_MANGLED_BACKREFERENCE "5"
-#else
 #define OTABSL_INTERNAL_MANGLED_NS \
-  OTABSL_INTERNAL_TOKEN_STR(OTABSL_OPTION_INLINE_NAMESPACE_NAME) "@absl"
+  OTABSL_INTERNAL_TOKEN_STR(OTABSL_OPTION_NAMESPACE_NAME) "@absl"
 #define OTABSL_INTERNAL_MANGLED_BACKREFERENCE "6"
 #endif
-#endif
 
 #undef OTABSL_INTERNAL_HAS_KEYWORD
 

api/include/opentelemetry/nostd/internal/absl/base/internal/inline_variable.h

@@ -68,15 +68,15 @@
 //   types, etc..
 #if defined(__clang__)
 #define OTABSL_INTERNAL_EXTERN_DECL(type, name) \
-  extern const ::absl::OTABSL_OPTION_INLINE_NAMESPACE_NAME::internal::identity_t<type> name;
+  extern const ::absl::OTABSL_OPTION_NAMESPACE_NAME::internal::identity_t<type> name;
 #else  // Otherwise, just define the macro to do nothing.
 #define OTABSL_INTERNAL_EXTERN_DECL(type, name)
 #endif  // defined(__clang__)
 
 // See above comment at top of file for details.
 #define OTABSL_INTERNAL_INLINE_CONSTEXPR(type, name, init) \
   OTABSL_INTERNAL_EXTERN_DECL(type, name)                  \
-  inline constexpr ::absl::OTABSL_OPTION_INLINE_NAMESPACE_NAME::internal::identity_t<type> name = init
+  inline constexpr ::absl::OTABSL_OPTION_NAMESPACE_NAME::internal::identity_t<type> name = init
 
 #else
 
@@ -89,14 +89,14 @@
 #define OTABSL_INTERNAL_INLINE_CONSTEXPR(var_type, name, init)                  \
   template <class /*AbslInternalDummy*/ = void>                               \
   struct AbslInternalInlineVariableHolder##name {                             \
-    static constexpr ::absl::OTABSL_OPTION_INLINE_NAMESPACE_NAME::internal::identity_t<var_type> kInstance = init; \
+    static constexpr ::absl::OTABSL_OPTION_NAMESPACE_NAME::internal::identity_t<var_type> kInstance = init; \
   };                                                                          \
                                                                               \
   template <class AbslInternalDummy>                                          \
-  constexpr ::absl::OTABSL_OPTION_INLINE_NAMESPACE_NAME::internal::identity_t<var_type>                            \
+  constexpr ::absl::OTABSL_OPTION_NAMESPACE_NAME::internal::identity_t<var_type>                            \
       AbslInternalInlineVariableHolder##name<AbslInternalDummy>::kInstance;   \
                                                                               \
-  static constexpr const ::absl::OTABSL_OPTION_INLINE_NAMESPACE_NAME::internal::identity_t<var_type>&              \
+  static constexpr const ::absl::OTABSL_OPTION_NAMESPACE_NAME::internal::identity_t<var_type>&              \
       name = /* NOLINT */                                                     \
       AbslInternalInlineVariableHolder##name<>::kInstance;                    \
   static_assert(sizeof(void (*)(decltype(name))) != 0,                        \

api/include/opentelemetry/nostd/internal/absl/base/internal/invoke.h

@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 //
-// absl::base_internal::Invoke(f, args...) is an implementation of
+// absl::OTABSL_OPTION_NAMESPACE_NAME::base_internal::Invoke(f, args...) is an implementation of
 // INVOKE(f, args...) from section [func.require] of the C++ standard.
 //
 // [func.require]
@@ -73,7 +73,7 @@ struct MemFunAndRef : StrippedAccept<MemFunAndRef> {
   template <typename MemFunType, typename C, typename Obj, typename... Args>
   struct AcceptImpl<MemFunType C::*, Obj, Args...>
       : std::integral_constant<bool, std::is_base_of<C, Obj>::value &&
-                                         absl::is_function<MemFunType>::value> {
+                                         absl::OTABSL_OPTION_NAMESPACE_NAME::is_function<MemFunType>::value> {
   };
 
   template <typename MemFun, typename Obj, typename... Args>
@@ -94,7 +94,7 @@ struct MemFunAndPtr : StrippedAccept<MemFunAndPtr> {
   template <typename MemFunType, typename C, typename Ptr, typename... Args>
   struct AcceptImpl<MemFunType C::*, Ptr, Args...>
       : std::integral_constant<bool, !std::is_base_of<C, Ptr>::value &&
-                                         absl::is_function<MemFunType>::value> {
+                                         absl::OTABSL_OPTION_NAMESPACE_NAME::is_function<MemFunType>::value> {
   };
 
   template <typename MemFun, typename Ptr, typename... Args>
@@ -116,7 +116,7 @@ struct DataMemAndRef : StrippedAccept<DataMemAndRef> {
   template <typename R, typename C, typename Obj>
   struct AcceptImpl<R C::*, Obj>
       : std::integral_constant<bool, std::is_base_of<C, Obj>::value &&
-                                         !absl::is_function<R>::value> {};
+                                         !absl::OTABSL_OPTION_NAMESPACE_NAME::is_function<R>::value> {};
 
   template <typename DataMem, typename Ref>
   static decltype(std::declval<Ref>().*std::declval<DataMem>()) Invoke(
@@ -134,7 +134,7 @@ struct DataMemAndPtr : StrippedAccept<DataMemAndPtr> {
   template <typename R, typename C, typename Ptr>
   struct AcceptImpl<R C::*, Ptr>
       : std::integral_constant<bool, !std::is_base_of<C, Ptr>::value &&
-                                         !absl::is_function<R>::value> {};
+                                         !absl::OTABSL_OPTION_NAMESPACE_NAME::is_function<R>::value> {};
 
   template <typename DataMem, typename Ptr>
   static decltype((*std::declval<Ptr>()).*std::declval<DataMem>()) Invoke(

api/include/opentelemetry/nostd/internal/absl/base/macros.h

@@ -41,7 +41,7 @@
 // can be used in defining new arrays. If you use this macro on a pointer by
 // mistake, you will get a compile-time error.
 #define OTABSL_ARRAYSIZE(array) \
-  (sizeof(::absl::macros_internal::ArraySizeHelper(array)))
+  (sizeof(::absl::OTABSL_OPTION_NAMESPACE_NAME::macros_internal::ArraySizeHelper(array)))
 
 namespace absl {
 OTABSL_NAMESPACE_BEGIN
@@ -60,7 +60,7 @@ OTABSL_NAMESPACE_END
 // static storage duration, and that the constructor should do nothing to its
 // state. Use of this macro indicates to the reader that it is legal to
 // declare a static instance of the class, provided the constructor is given
-// the absl::base_internal::kLinkerInitialized argument.
+// the absl::OTABSL_OPTION_NAMESPACE_NAME::base_internal::kLinkerInitialized argument.
 //
 // Normally, it is unsafe to declare a static variable that has a constructor or
 // a destructor because invocation order is undefined. However, if the type can
@@ -70,10 +70,10 @@ OTABSL_NAMESPACE_END
 //
 // Example:
 //       // Declaration
-//       explicit MyClass(absl::base_internal:LinkerInitialized x) {}
+//       explicit MyClass(absl::OTABSL_OPTION_NAMESPACE_NAME::base_internal:LinkerInitialized x) {}
 //
 //       // Invocation
-//       static MyClass my_global(absl::base_internal::kLinkerInitialized);
+//       static MyClass my_global(absl::OTABSL_OPTION_NAMESPACE_NAME::base_internal::kLinkerInitialized);
 namespace absl {
 OTABSL_NAMESPACE_BEGIN
 namespace base_internal {