[FEAT] Use single header yaml parser mini-yaml (#142)

.gitmodules

@@ -1,9 +1,6 @@
 [submodule "testing"]
 	path = testing
 	url = https://github.com/GraphScope/gar-test.git
-[submodule "cpp/thirdparty/yaml-cpp"]
-	path = cpp/thirdparty/yaml-cpp
-	url = https://github.com/jbeder/yaml-cpp.git
 [submodule "cpp/thirdparty/Catch2"]
 	path = cpp/thirdparty/Catch2
 	url = https://github.com/catchorg/Catch2.git

LICENSE

@@ -409,27 +409,31 @@ SOFTWARE.
 
 -------------------------------------------------------------------------------
 
-thirdparty/yaml-cpp: MIT License
+thirdparty/mini-yaml is referred from jimmiebergmann/mini-yaml project,
+which is licensed under MIT License.
 
-Copyright (c) 2008-2015 Jesse Beder.
+MIT License
+
+Copyright(c) 2018 Jimmie Bergmann
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
-of this software and associated documentation files (the "Software"), to deal
+of this software and associated documentation files(the "Software"), to deal
 in the Software without restriction, including without limitation the rights
 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 copies of the Software, and to permit persons to whom the Software is
-furnished to do so, subject to the following conditions:
+furnished to do so, subject to the following conditions :
 
-The above copyright notice and this permission notice shall be included in
-all copies or substantial portions of the Software.
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
 
 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.IN NO EVENT SHALL THE
 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-THE SOFTWARE.
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+
 
 -------------------------------------------------------------------------------
 

cpp/CMakeLists.txt

@@ -147,7 +147,6 @@ endmacro()
 # building or find third party library
 # ------------------------------------------------------------------------------
 find_package(Threads REQUIRED)
-find_yaml_cpp()
 find_package(OpenSSL QUIET)
 if (APPLE)
     find_package(curl REQUIRED)
@@ -178,28 +177,23 @@ endmacro()
 # generate gar library
 # ------------------------------------------------------------------------------
 macro(build_gar)
-    file(GLOB_RECURSE CORE_SRC_FILES "src/*.cc")
+    file(GLOB_RECURSE CORE_SRC_FILES "src/*.cc" ${CMAKE_CURRENT_SOURCE_DIR}/thirdparty/mini-yaml/yaml/*.cpp)
     add_library(gar SHARED ${CORE_SRC_FILES})
     install_gar_target(gar)
     target_compile_features(gar PRIVATE cxx_std_17)
     target_include_directories(gar PUBLIC $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>
                                           $<BUILD_INTERFACE:${PROJECT_SOURCE_DIR}/include>
-                                          $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/thirdparty/yaml-cpp/include>
+                                          $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/thirdparty/mini-yaml>
     )
     target_include_directories(gar SYSTEM BEFORE PRIVATE ${GAR_ARROW_INCLUDE_DIR})
     target_link_libraries(gar PRIVATE Threads::Threads ${CMAKE_DL_LIBS})
 
-    # make sure `libyaml-cpp.a` built first
-    add_dependencies(gar yaml-cpp)
-    get_target_location(YAML_CPP_LIBRARY_LOCATION yaml-cpp)
     if(APPLE)
         target_link_libraries(gar PRIVATE -Wl,-force_load gar_arrow_static
-            "${YAML_CPP_LIBRARY_LOCATION}"
             "${GAR_PARQUET_STATIC_LIB}"
             "${GAR_ARROW_BUNDLED_DEPS_STATIC_LIB}")
     else()
         target_link_libraries(gar PRIVATE -Wl,--exclude-libs,ALL -Wl,--whole-archive gar_arrow_static
-            "${YAML_CPP_LIBRARY_LOCATION}"
             "${GAR_PARQUET_STATIC_LIB}"
             "${GAR_ARROW_BUNDLED_DEPS_STATIC_LIB}" -Wl,--no-whole-archive)
     endif()

cpp/include/gar/utils/yaml.h

@@ -23,21 +23,21 @@ limitations under the License.
 #include "gar/utils/result.h"
 
 // forward declaration
-namespace YAML {
+namespace Yaml {
 class Node;
 }
 
 namespace GAR_NAMESPACE_INTERNAL {
 
-/** A wrapper of YAML::Node to provide functions to parse yaml. */
+/** A wrapper of ::Yaml::Node to provide functions to parse yaml. */
 class Yaml {
  public:
-  explicit Yaml(std::shared_ptr<YAML::Node> root_node)
+  explicit Yaml(std::shared_ptr<::Yaml::Node> root_node)
       : root_node_(root_node) {}
 
   ~Yaml() = default;
 
-  const YAML::Node operator[](const std::string& key) const;
+  const ::Yaml::Node operator[](const std::string& key) const;
 
   /**
    * Loads the input string as Yaml instance.
@@ -46,19 +46,12 @@ class Yaml {
    */
   static Result<std::shared_ptr<Yaml>> Load(const std::string& input);
 
-  /**
-   * Loads the input string as Yaml instance.
-   *
-   * Return Status::YamlError if input string can not be loaded(malformed).
-   */
-  static Result<std::shared_ptr<Yaml>> Load(const char* input);
-
   /**
    * Loads the input stream as Yaml instance.
    *
    * Return Status::YamlError if input string can not be loaded(malformed).
    */
-  static Result<std::shared_ptr<Yaml>> Load(std::istream& input);
+  static Result<std::shared_ptr<Yaml>> Load(std::iostream& input);
 
   /**
    * Loads the input file as a single Yaml instance.
@@ -68,7 +61,7 @@ class Yaml {
   static Result<std::shared_ptr<Yaml>> LoadFile(const std::string& file_name);
 
  private:
-  std::shared_ptr<YAML::Node> root_node_;
+  std::shared_ptr<::Yaml::Node> root_node_;
 };
 
 }  // namespace GAR_NAMESPACE_INTERNAL