chore: first commit

.clang-format

@@ -0,0 +1,181 @@
+---
+Language: Cpp
+AccessModifierOffset: -4
+AlignAfterOpenBracket: BlockIndent
+AlignArrayOfStructures: None
+AlignConsecutiveAssignments:
+    Enabled: true
+    AcrossEmptyLines: false
+    AcrossComments: true
+    AlignCompound: true
+    AlignFunctionPointers: false
+    PadOperators: true
+AlignConsecutiveBitFields:
+    Enabled: true
+    AcrossEmptyLines: false
+    AcrossComments: true
+AlignConsecutiveDeclarations: false
+AlignConsecutiveMacros: AcrossComments
+# AlignConsecutiveShortCaseStatements: false
+AlignEscapedNewlines: Left
+AlignOperands: Align
+AlignTrailingComments:
+    Kind: Always
+    OverEmptyLines:  0
+AllowAllArgumentsOnNextLine: true
+AllowAllParametersOfDeclarationOnNextLine: true
+AllowBreakBeforeNoexceptSpecifier: OnlyWithParen
+AllowShortBlocksOnASingleLine: Empty
+AllowShortCaseLabelsOnASingleLine: false
+AllowShortCompoundRequirementOnASingleLine: true
+AllowShortEnumsOnASingleLine: true
+AllowShortFunctionsOnASingleLine: Inline
+AllowShortIfStatementsOnASingleLine: Never
+AllowShortLambdasOnASingleLine: All
+AllowShortLoopsOnASingleLine: false
+AlwaysBreakAfterReturnType: None
+AlwaysBreakAfterDefinitionReturnType: None
+AlwaysBreakBeforeMultilineStrings: false
+AlwaysBreakTemplateDeclarations: Yes
+BinPackArguments: true
+BinPackParameters: true
+BitFieldColonSpacing: Both
+BreakBeforeBraces: Custom
+BraceWrapping:
+    AfterCaseLabel: false
+    AfterClass: false
+    AfterControlStatement: MultiLine
+    AfterEnum: false
+    AfterExternBlock: false
+    AfterFunction: true
+    AfterNamespace: false
+    AfterStruct: false
+    AfterUnion: false
+    BeforeCatch: true
+    BeforeElse: true
+    BeforeLambdaBody: false
+    BeforeWhile: false
+    IndentBraces: false
+    SplitEmptyFunction: false
+    SplitEmptyRecord: false
+    SplitEmptyNamespace: false
+# BracedInitializerIndentWidth: 4
+# BreakAdjacentStringLiterals: false
+BreakAfterAttributes: Never
+BreakArrays: false
+BreakBeforeBinaryOperators: None
+BreakBeforeConceptDeclarations: Always
+BreakBeforeInlineASMColon: OnlyMultiline
+BreakBeforeTernaryOperators: true
+BreakConstructorInitializers: BeforeColon
+BreakInheritanceList: AfterComma
+BreakStringLiterals: true
+CommentPragmas: '^ NO(LINT|SONAR)'
+CompactNamespaces: false
+ColumnLimit: 120
+ConstructorInitializerIndentWidth: 4
+ContinuationIndentWidth: 4
+Cpp11BracedListStyle: true
+DerivePointerAlignment: true
+DisableFormat: false
+EmptyLineAfterAccessModifier: Never
+EmptyLineBeforeAccessModifier: LogicalBlock
+FixNamespaceComments: true
+ForEachMacros:
+  - foreach
+  - Q_FOREACH
+  - BOOST_FOREACH
+IncludeBlocks: Preserve
+IncludeCategories:
+  - Regex:         '"stdafx\.h"'
+    Priority:      -1
+    SortPriority:  0
+    CaseSensitive: false
+  - Regex:         '^<[^.]+>'
+    Priority:      1
+    SortPriority:  0
+    CaseSensitive: false
+  - Regex:         '^<.*\.h>'
+    Priority:      2
+    SortPriority:  0
+    CaseSensitive: false
+  - Regex:         '^<.*'
+    Priority:      3
+    SortPriority:  0
+    CaseSensitive: false
+  - Regex:         '.*'
+    Priority:      4
+    SortPriority:  0
+    CaseSensitive: false
+IncludeIsMainRegex: '([-_](test|unittest))?$'
+IncludeIsMainSourceRegex: ''
+IndentAccessModifiers: false
+IndentCaseBlocks: false
+IndentCaseLabels: true
+IndentExternBlock: AfterExternBlock
+IndentGotoLabels: true
+IndentPPDirectives: AfterHash
+IndentRequiresClause: false
+IndentWidth: 4
+IndentWrappedFunctionNames: false
+InsertBraces: false
+InsertNewlineAtEOF: false
+InsertTrailingCommas: None
+IntegerLiteralSeparator:
+  Binary: 4
+  BinaryMinDigits: 8
+  Decimal: 3
+  DecimalMinDigits: 7
+  Hex: 4
+  HexMinDigits: 8
+KeepEmptyLinesAtTheStartOfBlocks: false
+LambdaBodyIndentation: Signature
+LineEnding: DeriveLF
+MacroBlockBegin: ''
+MacroBlockEnd: ''
+MaxEmptyLinesToKeep: 1
+NamespaceIndentation: None
+PPIndentWidth: -1
+PackConstructorInitializers: BinPack
+PointerAlignment: Left
+QualifierAlignment: Leave
+ReferenceAlignment: Pointer
+ReflowComments: true
+RemoveBracesLLVM: false
+RemoveSemicolon: false
+RequiresClausePosition: OwnLine
+RequiresExpressionIndentation: OuterScope
+SeparateDefinitionBlocks: Leave
+ShortNamespaceLines: 0
+SortIncludes: CaseSensitive
+SortUsingDeclarations: Lexicographic
+SpaceAfterCStyleCast: false
+SpaceAfterLogicalNot: false
+SpaceAfterTemplateKeyword: false
+SpaceAroundPointerQualifiers: Default
+SpaceBeforeAssignmentOperators: true
+SpaceBeforeCaseColon: false
+SpaceBeforeCpp11BracedList: false
+SpaceBeforeCtorInitializerColon: true
+SpaceBeforeInheritanceColon: true
+# SpaceBeforeJsonColon: false
+SpaceBeforeParens: ControlStatementsExceptControlMacros
+SpaceBeforeRangeBasedForLoopColon: true
+SpaceBeforeSquareBrackets: false
+SpaceInEmptyBlock: false
+SpacesBeforeTrailingComments: 2
+SpacesInAngles: Never
+SpacesInLineCommentPrefix:
+    Minimum: 1
+    Maximum: -1
+# SpacesInParens: Never
+SpacesInParentheses: false
+SpacesInSquareBrackets: false
+Standard: Latest
+StatementAttributeLikeMacros:
+  - Q_EMIT
+  - emit
+StatementMacros:
+  - Q_UNUSED
+TabWidth: 4
+UseTab: Never

.clang-tidy

@@ -0,0 +1,4 @@
+---
+Checks:            'bugprone-*,cert-*,clang-analyzer-*,concurrency-*,cppcoreguidelines-*,hicpp-*,misc-*,modernize-*,performance-*,portability-*,readability-*,-modernize-use-trailing-return-type,-bugprone-easily-swappable-parameters,-readability-identifier-length,-readability-named-parameter,-hicpp-special-member-functions,-hicpp-use-equals-default,-hicpp-move-const-arg,-hicpp-named-parameter,-hicpp-vararg,-misc-include-cleaner,-cppcoreguidelines-pro-type-union-access,-misc-non-private-member-variables-in-classes,-*-avoid-do-while'
+FormatStyle:       none
+HeaderFilterRegex: '.*'

.gitignore

@@ -0,0 +1,2 @@
+/.vscode/
+/build/

CMakeLists.txt

@@ -0,0 +1,27 @@
+cmake_minimum_required(VERSION 3.25)
+
+project(opentelemetry_exporter_syslog_logs VERSION 1.0.0 LANGUAGES CXX)
+set(CMAKE_VERBOSE_MAKEFILE ON CACHE BOOL "ON")
+
+option(WITH_TESTING "Whether to enable tests" ON)
+option(INSTALL_SYSLOG_EXPORTER "Whether to install the syslog exporter" ON)
+
+# Logs signal became stable in v1.11.0, see https://github.com/open-telemetry/opentelemetry-cpp/pull/2229, https://github.com/open-telemetry/opentelemetry-cpp/blob/v1.11.0/CHANGELOG.md
+find_package(opentelemetry-cpp CONFIG REQUIRED)
+if(opentelemetry-cpp_VERSION VERSION_LESS 1.11.0)
+    message(FATAL_ERROR "opentelemetry-cpp version must be at least 1.11.0, ${opentelemetry-cpp_VERSION} found")
+endif()
+
+add_subdirectory(src)
+
+if(WITH_TESTING)
+    include(FindGTest)
+    find_package(GTest CONFIG COMPONENTS gtest gmock)
+    if(TARGET GTest::gtest AND TARGET GTest::gmock)
+        include(CTest)
+        enable_testing()
+        add_subdirectory(test)
+    else()
+        message(WARNING "GTest not found, tests will not be built")
+    endif()
+endif()

cmake/opentelemetry_exporter_syslog_logs-config.cmake

@@ -0,0 +1,15 @@
+get_filename_component(OTEL_SYSLOG_EXPORTER_CMAKE_DIR "${CMAKE_CURRENT_LIST_FILE}" PATH)
+
+list(APPEND CMAKE_MODULE_PATH ${OTEL_SYSLOG_EXPORTER_CMAKE_DIR})
+
+include(CMakeFindDependencyMacro)
+find_dependency(opentelemetry-cpp QUIET REQUIRED COMPONENTS logs)
+if(opentelemetry-cpp_VERSION VERSION_LESS 1.11.0)
+    message(FATAL_ERROR "opentelemetry-cpp version must be at least 1.11.0, ${opentelemetry-cpp_VERSION} found")
+endif()
+
+if(NOT TARGET opentelemetry_exporter_syslog_logs::opentelemetry_exporter_syslog_logs)
+    include("${OTEL_SYSLOG_EXPORTER_CMAKE_DIR}/opentelemetry_exporter_syslog_logs-target.cmake")
+endif()
+
+set(OTEL_SYSLOG_EXPORTER_LIBRARIES opentelemetry_exporter_syslog_logs::opentelemetry_exporter_syslog_logs)

include/opentelemetry_exporter_syslog_logs/syslog_exporter_factory.h

@@ -0,0 +1,33 @@
+#ifndef FD634219_63FB_4E23_BC1D_6DB0BC20B6BE
+#define FD634219_63FB_4E23_BC1D_6DB0BC20B6BE
+
+#include <memory>
+#include <opentelemetry/nostd/string_view.h>
+#include <opentelemetry/sdk/logs/exporter.h>
+
+#include "opentelemetry_exporter_syslog_logs_export.h"
+#include "syslog_interface.h"
+
+namespace opentelemetry::exporter::logs {
+
+class OPENTELEMETRY_EXPORTER_SYSLOG_LOGS_EXPORT SyslogLogRecordExporterFactory {
+public:
+    static std::unique_ptr<opentelemetry::sdk::logs::LogRecordExporter> Create(opentelemetry::nostd::string_view ident);
+
+    static std::unique_ptr<opentelemetry::sdk::logs::LogRecordExporter>
+    Create(opentelemetry::nostd::string_view ident, int option, int facility);
+
+    static std::unique_ptr<opentelemetry::sdk::logs::LogRecordExporter>
+    Create(opentelemetry::nostd::string_view ident, const std::shared_ptr<SyslogInterface>& syslog);
+
+    static std::unique_ptr<opentelemetry::sdk::logs::LogRecordExporter> Create(
+        opentelemetry::nostd::string_view ident, const std::shared_ptr<SyslogInterface>& syslog, int option,
+        int facility
+    );
+
+    static void setSyslogImplementation(const std::shared_ptr<SyslogInterface>& syslog);
+};
+
+}  // namespace opentelemetry::exporter::logs
+
+#endif /* FD634219_63FB_4E23_BC1D_6DB0BC20B6BE */

include/opentelemetry_exporter_syslog_logs/syslog_interface.h

@@ -0,0 +1,20 @@
+#ifndef F6CC3A7F_2A2D_4616_B15D_A7739D98F053
+#define F6CC3A7F_2A2D_4616_B15D_A7739D98F053
+
+#include <opentelemetry/nostd/string_view.h>
+#include "opentelemetry_exporter_syslog_logs_export.h"
+
+namespace opentelemetry::exporter::logs {
+
+// NOLINTNEXTLINE(*-special-member-functions)
+class OPENTELEMETRY_EXPORTER_SYSLOG_LOGS_EXPORT SyslogInterface {
+public:
+    virtual ~SyslogInterface()                                                              = default;
+    virtual void openlog(opentelemetry::nostd::string_view ident, int option, int facility) = 0;
+    virtual void syslog(int priority, opentelemetry::nostd::string_view message)            = 0;
+    virtual void closelog()                                                                 = 0;
+};
+
+}  // namespace opentelemetry::exporter::logs
+
+#endif /* F6CC3A7F_2A2D_4616_B15D_A7739D98F053 */

src/CMakeLists.txt

@@ -0,0 +1,74 @@
+include(GenerateExportHeader)
+
+set(sources
+    syslog_exporter.cpp
+    syslog_exporter_factory.cpp
+    default_syslog_implementation_p.cpp
+)
+
+set(headers
+    ${CMAKE_CURRENT_BINARY_DIR}/opentelemetry_exporter_syslog_logs_export.h
+    ${CMAKE_SOURCE_DIR}/include/opentelemetry_exporter_syslog_logs/syslog_exporter_factory.h
+    ${CMAKE_SOURCE_DIR}/include/opentelemetry_exporter_syslog_logs/syslog_interface.h
+)
+
+add_library(${PROJECT_NAME} ${sources})
+target_compile_features(${PROJECT_NAME} PRIVATE cxx_std_17)
+target_link_libraries(${PROJECT_NAME} PUBLIC opentelemetry-cpp::logs)
+
+target_include_directories(${PROJECT_NAME}
+    PUBLIC
+        $<INSTALL_INTERFACE:include>
+        $<BUILD_INTERFACE:${CMAKE_SOURCE_DIR}/include>
+        $<BUILD_INTERFACE:${CMAKE_CURRENT_BINARY_DIR}>
+    PRIVATE
+        ${CMAKE_CURRENT_BINARY_DIR}
+)
+
+set_target_properties(
+    ${PROJECT_NAME}
+    PROPERTIES
+        CXX_EXTENSIONS OFF
+        CXX_VISIBILITY_PRESET hidden
+        VISIBILITY_INLINES_HIDDEN ON
+        POSITION_INDEPENDENT_CODE ON
+        PUBLIC_HEADER "${headers}"
+        INTERFACE_COMPILE_FEATURES cxx_std_17
+)
+
+generate_export_header(${PROJECT_NAME} BASE_NAME ${PROJECT_NAME})
+if(NOT BUILD_SHARED_LIBS)
+    set_target_properties(${PROJECT_NAME} PROPERTIES COMPILE_FLAGS -DOPENTELEMETRY_EXPORTER_SYSLOG_LOGS_STATIC_DEFINE)
+endif()
+
+if(INSTALL_SYSLOG_EXPORTER)
+    include(GNUInstallDirs)
+    include(CMakePackageConfigHelpers)
+
+    install(
+        TARGETS ${PROJECT_NAME}
+        EXPORT "${PROJECT_NAME}-target"
+        RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
+        LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
+        ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
+        PUBLIC_HEADER DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}/${PROJECT_NAME}"
+    )
+
+    install(EXPORT "${PROJECT_NAME}-target"
+        FILE "${PROJECT_NAME}-target.cmake"
+        NAMESPACE "${PROJECT_NAME}::"
+        DESTINATION "${CMAKE_INSTALL_LIBDIR}/cmake/${PROJECT_NAME}"
+    )
+
+    write_basic_package_version_file(
+        "${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}-config-version.cmake"
+        VERSION ${PROJECT_VERSION}
+        COMPATIBILITY AnyNewerVersion
+    )
+
+    install(FILES
+        "${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}-config-version.cmake"
+        "${CMAKE_SOURCE_DIR}/cmake/${PROJECT_NAME}-config.cmake"
+        DESTINATION "${CMAKE_INSTALL_LIBDIR}/cmake/${PROJECT_NAME}"
+    )
+endif()

src/default_syslog_implementation.h

@@ -0,0 +1,13 @@
+#ifndef D17D59F2_0FDF_4FF4_96EE_244866D19190
+#define D17D59F2_0FDF_4FF4_96EE_244866D19190
+
+#include "opentelemetry_exporter_syslog_logs/syslog_interface.h"
+
+class DefaultSyslogImplementation : public opentelemetry::exporter::logs::SyslogInterface {
+public:
+    void openlog(opentelemetry::nostd::string_view ident, int option, int facility) override;
+    void syslog(int priority, opentelemetry::nostd::string_view message) override;
+    void closelog() override;
+};
+
+#endif /* D17D59F2_0FDF_4FF4_96EE_244866D19190 */

src/default_syslog_implementation_p.cpp

@@ -0,0 +1,18 @@
+#include "default_syslog_implementation.h"
+
+#include <syslog.h>
+
+void DefaultSyslogImplementation::openlog(opentelemetry::nostd::string_view ident, int option, int facility)
+{
+    ::openlog(ident.data(), option, facility);
+}
+
+void DefaultSyslogImplementation::syslog(int priority, opentelemetry::nostd::string_view message)
+{
+    ::syslog(priority, "%s", message.data());  // NOLINT(*-type-vararg)
+}
+
+void DefaultSyslogImplementation::closelog()
+{
+    ::closelog();
+}