make cyclonedds vender package play nice with colcon (#34)

* Un-vendor cyclonedds

Upstream changes in https://github.com/eclipse-cyclonedds/cyclonedds/pull/256 should make this unnecessary and allow you to clone the package into your ROS workspace.

* Remove obsolete gitignore

* Recommend cloning eclipse-cyclonedds/cyclonedds

README.md

@@ -11,14 +11,12 @@ source directory, and then run colcon build in the usual manner:
 
     cd ros2_ws/src
     git clone https://github.com/atolab/rmw_cyclonedds
+    git clone https://github.com/eclipse-cyclonedds/cyclonedds
     cd ..
     rosdep install --from src -i
-    colcon build --cmake-args -DCMAKE_BUILD_TYPE=RelWithDebInfo -DCYCLONEDDS_FROM_SOURCE=ON
+    colcon build
     export RMW_IMPLEMENTATION=rmw_cyclonedds_cpp
 
-If you prefer to install CycloneDDS yourself, set `-DCYCLONEDDS_FROM_SOURCE=OFF`. CMake caches this
-value, so you can omit it between builds
-
 This seems to work fine on Linux with a binary ROS2 installation as well as when building ROS2 from
 source.  On macOS it has only been tested in a source build on a machine in an "unsupported"
 configuration (macOS 10.14 with SIP enabled, instead of 10.12 with SIP disabled), and apart from a
@@ -26,7 +24,7 @@ few details that are caused by the machine configuration, that works fine, too.
 why it wouldn't work the same on Windows, but I haven't tried.
 
 If you want to use a pre-existing installation of Cyclone DDS, you don't need to clone it, but you
-may have to tell CMake where to look for it using the CycloneDDS\_DIR variable.  That also appears
+may have to tell CMake where to look for it using the `CycloneDDS_DIR` variable.  That also appears
 to be the case if there are other packages in the ROS2 workspace that you would like to use Cyclone
 DDS directly instead of via the ROS2 abstraction.
 

cyclonedds_vendor/CMakeLists.txt

@@ -1,14 +0,0 @@
-cmake_minimum_required(VERSION 3.5)
-project(cyclonedds_vendor)
-find_package(ament_cmake REQUIRED)
-
-include(ExternalProject)
-ExternalProject_Add(cyclonedds
-  GIT_REPOSITORY "https://github.com/eclipse-cyclonedds/cyclonedds.git"
-  CMAKE_ARGS
-   -DBUILD_CONFTOOL:BOOL=OFF
-   -DBUILD_IDLC:BOOL=OFF
-   -DCMAKE_INSTALL_PREFIX=${CMAKE_INSTALL_PREFIX}
-  )
-
-ament_package()

cyclonedds_vendor/package.xml

@@ -1,15 +0,0 @@
-<?xml version="1.0"?>
-<?xml-model href="http://download.ros.org/schema/package_format3.xsd" schematypens="http://www.w3.org/2001/XMLSchema"?>
-<package format="3">
-    <name>cyclonedds_vendor</name>
-    <version>0.4.0</version>
-    <description>Wrapper package for Eclipse CycloneDDS.</description>
-    <maintainer email="erik.boasson@adlinktech.com">Erik Boasson</maintainer>
-    <license>Apache License 2.0</license>
-
-    <buildtool_depend>ament_cmake</buildtool_depend>
-
-    <export>
-        <build_type>ament_cmake</build_type>
-    </export>
-</package>

rmw_cyclonedds_cpp/CMakeLists.txt

@@ -16,8 +16,6 @@ cmake_minimum_required(VERSION 3.5)
 
 project(rmw_cyclonedds_cpp)
 
-set(CYCLONEDDS_FROM_SOURCE CACHE BOOL "Should we download and build cycloneDDS from source?")
-
 link_directories(/usr/local/lib)
 
 # Default to C++14
@@ -33,13 +31,7 @@ find_package(ament_cmake_ros REQUIRED)
 
 find_package(rcutils REQUIRED)
 
-if(CYCLONEDDS_FROM_SOURCE)
-  message("Building CycloneDDS from source")
-  find_package(cyclonedds_vendor REQUIRED)
-else()
-  find_package(cyclonedds_cmake_module REQUIRED)
-  message("Using installed CycloneDDS")
-endif()
+find_package(cyclonedds_cmake_module REQUIRED)
 find_package(CycloneDDS REQUIRED CONFIG)
 
 find_package(rmw REQUIRED)

rmw_cyclonedds_cpp/package.xml

@@ -14,7 +14,6 @@
 
   <build_depend>cyclonedds</build_depend>
   <build_depend>cyclonedds_cmake_module</build_depend>
-  <build_depend>cyclonedds_vendor</build_depend>
 
   <build_depend>rcutils</build_depend>
   <build_depend>rmw</build_depend>