Add support for the ROS build system (#161)

CMakeLists.txt

@@ -37,6 +37,8 @@ write_basic_package_version_file(${PROJECT_NAME}ConfigVersion.cmake
         ARCH_INDEPENDENT)
 
 if(MAGIC_ENUM_OPT_INSTALL)
+    include(GNUInstallDirs)
+
     install(TARGETS ${PROJECT_NAME}
             EXPORT ${PROJECT_NAME}Config)
 
@@ -52,4 +54,7 @@ if(MAGIC_ENUM_OPT_INSTALL)
 
     export(EXPORT ${PROJECT_NAME}Config
             NAMESPACE ${PROJECT_NAME}::)
+
+    install(FILES ${CMAKE_CURRENT_SOURCE_DIR}/package.xml
+            DESTINATION ${CMAKE_INSTALL_DATAROOTDIR}/${PROJECT_NAME})
 endif()

README.md

@@ -139,7 +139,7 @@ enum class Color { RED = 2, BLUE = 4, GREEN = 8 };
   // color_entries[0].first -> Color::RED
   // color_entries[0].second -> "RED"
   ```
-  
+
 * Enum fusion for multi-level switch/case statements
 
   ```cpp
@@ -250,6 +250,13 @@ enum class Color { RED = 2, BLUE = 4, GREEN = 8 };
 
   (Note that you must use a supported compiler or specify it with `export CC= <compiler>`.)
 
+* If you are using [Ros](https://www.ros.org/), you can include this package by adding `<depend>magic_enum</depend>` to your package.xml and include this package in your workspace. In your CMakeLists.txt add the following:
+  ```cmake
+  find_package(magic_enum CONFIG REQUIRED)
+  ...
+  target_link_libraries(your_executable magic_enum::magic_enum)
+  ```
+
 ## Compiler compatibility
 
 * Clang/LLVM >= 5

package.xml

@@ -0,0 +1,22 @@
+<?xml version="1.0"?>
+<?xml-model href="http://download.ros.org/schema/package_format2.xsd" schematypens="http://www.w3.org/2001/XMLSchema"?>
+
+<!-- A package.xml in the root of a cmake projects allows it to be built using catkin or colcon (the ROS build system) -->
+
+<package format="2">
+  <name>magic_enum</name>
+  <version>0.7.3</version>
+  <description>
+    Static reflection for enums (to string, from string, iteration) for modern C++,
+    work with any enum type without any macro or boilerplate code
+  </description>
+
+  <maintainer email="neargye@gmail.com">Neargye</maintainer>
+  <license>MIT</license>
+
+  <buildtool_depend>cmake</buildtool_depend>
+
+  <export>
+    <build_type>cmake</build_type>
+  </export>
+</package>