Feature to specify namespace of generated type of .msg/.srv?

[kohei306]

It would be great if we can have flexibility to specify namespace for the generated message/service type. This helps not to break old recording after refactoring package structure and changing package name or separate it out to new package (This means name space changes).

[dirk-thomas]

Since the already released ROS distro Noetic is planned to be the last ROS 1 distribution there is no plan to implement new features like this. The straight forward workaround for your use case seems to be to keep the previous package name around.

[kohei306]

Since the already released ROS distro Noetic is planned to be the last ROS 1 distribution there is no plan to implement new features like this. The straight forward workaround for your use case seems to be to keep the previous package name around.

I have made PRs for genmsg & gencpp.

https://github.com/ros/genmsg/pull/94 https://github.com/ros/gencpp/pull/50

[dirk-thomas]

I still don't think that this is a change we want to land in an already released distro. Also it opens the door to colliding files coming from different Debian packages.

Anyway the new maintainer of this repo @mjcarroll might want to comment on this.

[Eddylib]

It would be greate if the namespace can be inferenced by the structure of message defination dir. for example: directory structure

PackageA
    |---msg
         |---dir1
                |---message1.msg
         |---dir2
                |---message2.msg

output files: devel/include/PackageA/dir1/message1.msg devel/include/PackageA/dir2/message2.msg

usercode:

#include <PackageA/dir1/message1.h>
#include <PackageA/dir2/message2.h>
using PackageA::dir1::message1;
using PackageA::dir2::message2;

It will be great for integrate common messages into one package to reduce cycle dependence without corrupting the original structure of project.