No 'rosidl_typesupport_c' found on AlmaLinux 8

[christianrauch]

Building any minimal node (e.g. examples_rclcpp_minimal_publisher) on AlmaLinux 8 fails with No 'rosidl_typesupport_c' found, even though package ros-humble-rosidl-typesupport-c is installed.

Bug report

Required Info:

• Operating System:
  • AlmaLinux 8
• Installation type:
  • binaries
• Version or commit hash:
  • 2.0.2
• DDS implementation:
• Client library (if applicable):
  • rclcpp

Steps to reproduce issue

Use the following GitHub CI pipeline (https://github.com/christianrauch/action-ros-ci-almalinux-test/tree/minimal):

name: CI

on:
  push:
    branches: [ "main" ]

jobs:
  build:
    name: "AlmaLinux 8 / humble"
    runs-on: ubuntu-latest
    container:
      image: almalinux:8

    steps:
      - uses: ros-tooling/[email protected]

      - name: generate repos file
        run: |
          cat << EOF > sources.repos
          repositories:
            src/examples:
              type: git
              url: https://github.com/ros2/examples.git
              version: humble
          EOF

      - uses: ros-tooling/[email protected]
        with:
          package-name: examples_rclcpp_minimal_publisher
          target-ros2-distro: humble
          vcs-repo-file-url: sources.repos

Expected behavior

examples_rclcpp_minimal_publisher should compile without issues.

Actual behavior

The build fails with No 'rosidl_typesupport_c' found:

Starting >>> examples_rclcpp_minimal_publisher
--- output: examples_rclcpp_minimal_publisher
-- The C compiler identification is GNU 8.5.0
-- The CXX compiler identification is GNU 8.5.0
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working C compiler: /usr/bin/cc - skipped
-- Detecting C compile features
-- Detecting C compile features - done
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Check for working CXX compiler: /usr/bin/c++ - skipped
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Found ament_cmake: 1.3.11 (/opt/ros/humble/share/ament_cmake/cmake)
-- Found Python3: /usr/bin/python3 (found version "3.6.8") found components: Interpreter 
-- Override CMake install command with custom implementation using symlinks instead of copying resources
-- Found rclcpp: 16.0.11 (/opt/ros/humble/share/rclcpp/cmake)
-- Found rosidl_generator_c: 3.1.6 (/opt/ros/humble/share/rosidl_generator_c/cmake)
-- Found rosidl_adapter: 3.1.6 (/opt/ros/humble/share/rosidl_adapter/cmake)
-- Found rosidl_generator_cpp: 3.1.6 (/opt/ros/humble/share/rosidl_generator_cpp/cmake)
CMake Error at /opt/ros/humble/share/rosidl_typesupport_c/cmake/get_used_typesupports.cmake:35 (message):
  No 'rosidl_typesupport_c' found
Call Stack (most recent call first):
  /opt/ros/humble/share/rosidl_typesupport_c/cmake/rosidl_typesupport_c-extras.cmake:8 (get_used_typesupports)
  /opt/ros/humble/share/rosidl_typesupport_c/cmake/rosidl_typesupport_cConfig.cmake:41 (include)
  /opt/ros/humble/share/builtin_interfaces/cmake/ament_cmake_export_dependencies-extras.cmake:21 (find_package)
  /opt/ros/humble/share/builtin_interfaces/cmake/builtin_interfacesConfig.cmake:41 (include)
  /opt/ros/humble/share/libstatistics_collector/cmake/ament_cmake_export_dependencies-extras.cmake:21 (find_package)
  /opt/ros/humble/share/libstatistics_collector/cmake/libstatistics_collectorConfig.cmake:41 (include)
  /opt/ros/humble/share/rclcpp/cmake/ament_cmake_export_dependencies-extras.cmake:21 (find_package)
  /opt/ros/humble/share/rclcpp/cmake/rclcppConfig.cmake:41 (include)
  CMakeLists.txt:14 (find_package)

See full log: logs_32542829113.zip

[clalancette]

For what it is worth, compiling the examples on a local Almalinux8 container works just fine.

[christianrauch]

Can you reproduce this via the CI pipeline? This should be pretty deterministic with the Docker image.

[christophebedard]

Have you tried getting setup-ros to install the ROS 2 Humble binaries (instead of having action-ros-ci install them through rosdep install) by setting required-ros-distributions: humble?

[christianrauch]

Have you tried getting setup-ros to install the ROS 2 Humble binaries (instead of having action-ros-ci install them through rosdep install) by setting required-ros-distributions: humble?

Same effect. I also manually install some packages with dnf -y install ros-humble-ros-base with the same No 'rosidl_typesupport_c' found outcome.

Can you reproduce my findings with the CI pipeline above? I am running these tests in the repo https://github.com/christianrauch/action-ros-ci-almalinux-test. Feel free to fork this and try this out.

The same error was also reported in #129. So this is not only related to the ros-tooling/action-ros-ci action. It just happens to trigger the issue reliably.

[christophebedard]

I've been able to fork your repo and reproduce the issue. Thank you, that is helpful. You might want to include a link to that repo in the issue description.

I started looking into how ament looks up rosidl_typesupport_c in the ament index and what might be missing, but I don't have that much time to try and dig deep into it myself.

[cottsay]

Hey, I got a bit nerd sniped on this one, but I was able to figure out what's going on. It's an absolute doozy of a bug in colcon-core. The problem revolves around GitHub Actions using hyphens in some environment variables even though they (supposedly) aren't supported by sh. I can reproduce similar bugs in Ubuntu as well, it was a bit of a perfect storm that caused this specific behavior on AlmaLinux 8.

More details to come, but I wanted to give you guys a heads-up so that we don't duplicate effort.