make sqlite3_vendor an ament package

sqlite3_vendor/CMakeLists.txt

@@ -1,8 +1,16 @@
 cmake_minimum_required(VERSION 3.5)
 project(sqlite3_vendor)
 
-list(INSERT CMAKE_MODULE_PATH 0 "${CMAKE_CURRENT_SOURCE_DIR}/cmake/Modules")
-find_package(SQLite3)
+find_package(ament_cmake REQUIRED)
+
+option(FORCE_BUILD_VENDOR_PKG
+  "Build SQLite3 from source, even if system-installed package is available"
+  OFF)
+
+if(NOT FORCE_BUILD_VENDOR_PKG)
+  list(INSERT CMAKE_MODULE_PATH 0 "${CMAKE_CURRENT_SOURCE_DIR}/cmake/Modules")
+  find_package(SQLite3 QUIET)
+endif()
 
 if (NOT SQLite3_FOUND)
   set(extra_cmake_args)
@@ -30,16 +38,8 @@ else ()
   message(STATUS "Found SQLite3. Using SQLite3 from system.")
 endif ()
 
-configure_file(sqlite3_vendorConfig.cmake.in "${PROJECT_BINARY_DIR}/sqlite3_vendorConfig.cmake" @ONLY)
-configure_file(sqlite3_vendorConfig-version.cmake.in "${PROJECT_BINARY_DIR}/sqlite3_vendorConfig-version.cmake" @ONLY)
-
 install(DIRECTORY cmake DESTINATION share/${PROJECT_NAME})
 
-install(FILES
-  package.xml
-  DESTINATION share/${PROJECT_NAME})
-
-install(FILES
-  "${PROJECT_BINARY_DIR}/sqlite3_vendorConfig.cmake"
-  "${PROJECT_BINARY_DIR}/sqlite3_vendorConfig-version.cmake"
-  DESTINATION share/${PROJECT_NAME}/cmake)
+ament_package(
+  CONFIG_EXTRAS "sqlite3_vendor-extras.cmake"
+)

sqlite3_vendor/package.xml

@@ -8,11 +8,11 @@
   <maintainer email="ros-tooling@googlegroups.com">ROS Tooling Working Group</maintainer>
   <license>Apache License 2.0</license>
 
-  <buildtool_depend>cmake</buildtool_depend>
+  <buildtool_depend>ament_cmake</buildtool_depend>
 
   <depend>libsqlite3-dev</depend>
 
   <export>
-    <build_type>cmake</build_type>
+    <build_type>ament_cmake</build_type>
   </export>
 </package>

sqlite3_vendor/sqlite3_vendor-extras.cmake

@@ -0,0 +1,15 @@
+# Copyright 2019 Open Source Robotics Foundation, Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+list(INSERT CMAKE_MODULE_PATH 0 "${sqlite3_vendor_DIR}/Modules")