[sdformat6] Add new port 🤖

[traversaro]

Add new port for the sdformat library (http://sdformat.org/).

The sdformat library is commonly used with the Ignition Robotics libraries (#7781) and is a fundamental dependency of the Gazebo robotics simulator (#8014).

[traversaro]

The Linux build is failing, but the "port build failure logs" are empty.

[traversaro]

The problem in the Linux build is apparently that ruby is not present in the system:

CMake Error at scripts/cmake/vcpkg_find_acquire_program.cmake:282 (message):
  Could not find ruby.  Please install it via your package manager.
Call Stack (most recent call first):
  ports/sdformat6/portfile.cmake:12 (vcpkg_find_acquire_program)
  scripts/ports.cmake:85 (include)

Any idea on how to solve it?

[Rastaban]

I will look into ruby missing on the CI machines.

[Rastaban]

I am installing ruby-full on the CI machines and have rerun the vcpkg-Linux-PR test. I now see the following post build validation failure:

-- Performing post-build validation
There should be no bin\ directory in a static build, but /ci/myagent/_work/2/s/packages/sdformat6_x64-linux/bin is present.
There should be no debug\bin\ directory in a static build, but /ci/myagent/_work/2/s/packages/sdformat6_x64-linux/debug/bin is present.
If the creation of bin\ and/or debug\bin\ cannot be disabled, use this in the portfile to remove them

    if(VCPKG_LIBRARY_LINKAGE STREQUAL static)
        file(REMOVE_RECURSE ${CURRENT_PACKAGES_DIR}/bin ${CURRENT_PACKAGES_DIR}/debug/bin)
    endif()

There should be no empty directories in /ci/myagent/_work/2/s/packages/sdformat6_x64-linux
The following empty directories were found:

    /ci/myagent/_work/2/s/packages/sdformat6_x64-linux/debug/bin
    /ci/myagent/_work/2/s/packages/sdformat6_x64-linux/bin

If a directory should be populated but is not, this might indicate an error in the portfile.
If the directories are not needed and their creation cannot be disabled, use something like this in the portfile to remove them:

    file(REMOVE_RECURSE ${CURRENT_PACKAGES_DIR}/a/dir ${CURRENT_PACKAGES_DIR}/some/other/dir)


Found 2 error(s). Please correct the portfile:
    /ci/myagent/_work/2/s/ports/sdformat6/portfile.cmake
-- Performing post-build validation done

[traversaro]

@Rastaban thanks for installing ruby, i fixed the problem you reported in the latest commit.

[Rastaban]

The uwp failures look like they are by design to me (they call desktop only functions like CreateFileA) so I consider the tests passing at this point.

[traversaro]

The uwp failures are indeed due to missing upstream support, but the arm64-windows build could be easily fixed by using this patch in vcpkg port: https://bitbucket.org/osrf/sdformat/pull-requests/565/avoid-hardcoding-machine-x64-flag-on-64/diff .