Fix generate-conda-packages job

.ci/initial-cache.gh.cmake

@@ -1,6 +1,7 @@
 # Dependencies options
 set(ROBOTOLOGY_USES_GAZEBO ON CACHE BOOL "")
-set(ROBOTOLOGY_USES_MUJOCO ON CACHE BOOL "")
+# ROBOTOLOGY_USES_MUJOCO is not really used as of January 2024
+set(ROBOTOLOGY_USES_MUJOCO OFF CACHE BOOL "")
 set(ROBOTOLOGY_USES_PCL_AND_VTK ON CACHE BOOL "")
 
 # Octave is not supported on Windows or on Conda

cmake/BuildICUB.cmake

@@ -101,6 +101,7 @@ ycm_ep_helper(ICUB TYPE GIT
                               ${ICUB_PYTHON_INSTALL_CMAKE_ARGS})
 
 set(ICUB_CONDA_DEPENDENCIES ace libopencv gsl ipopt libode qt-main sdl)
+set(ICUB_CONDA_BUILD_DEPENDENCIES_EXPLICIT)
 
 if(NOT (APPLE OR WIN32))
   list(APPEND ICUB_CONDA_DEPENDENCIES libdc1394)
@@ -118,7 +119,7 @@ if(ROBOTOLOGY_USES_ESDCAN)
 endif()
 
 if(ICUB_COMPILE_BINDINGS)
-  list(APPEND ICUB_CONDA_DEPENDENCIES swig)
+  list(APPEND ICUB_CONDA_BUILD_DEPENDENCIES_EXPLICIT swig)
 endif()
 
 if(ROBOTOLOGY_USES_PYTHON)

conda/cmake/RobotologySuperbuildGenerateCondaRecipes.cmake

@@ -183,6 +183,13 @@ macro(generate_metametadata_file)
       endforeach()
     endif()
 
+    if(NOT "${${_cmake_pkg}_CONDA_BUILD_DEPENDENCIES_EXPLICIT}" STREQUAL "")
+      string(APPEND metametadata_file_contents "    build_dependencies_explicit:\n")
+      foreach(_build_dep IN LISTS ${_cmake_pkg}_CONDA_BUILD_DEPENDENCIES_EXPLICIT)
+        string(APPEND metametadata_file_contents "      - ${_build_dep}\n")
+      endforeach()
+    endif()
+
     if(NOT "${${_cmake_pkg}_CONDA_ENTRY_POINTS}" STREQUAL "")
       string(APPEND metametadata_file_contents "    entry_points:\n")
       foreach(_entry_point IN LISTS ${_cmake_pkg}_CONDA_ENTRY_POINTS)

conda/cmake_recipe_template/meta.yaml

@@ -24,6 +24,8 @@ requirements:
     - cmake
     - pkg-config
     - ninja
+{% for build_dep in build_dependencies_explicit %}    - {{ build_dep }}
+{% endfor %}
 {# Handle specific packages required for gl on Linux, see https://conda-forge.org/docs/maintainer/knowledge_base.html?#libgl #}
 {# libxcb, libxfixes, libxau and expat are not documented anywhere, but without those blocktest does not build correctly #}
 {% if require_opengl_linux %}{% raw %}    - {{ cdt('mesa-libgl-devel') }}

conda/conda_build_config.yml

@@ -8,3 +8,9 @@ qt:
 
 qt_main:
   - 5.15
+
+# Workaround for:
+# * https://github.com/robotology/robotology-superbuild/pull/1574#issuecomment-1898498891
+# * https://github.com/robotology/robotology-superbuild/issues/1572#issuecomment-1911740644
+swig:
+ - 4.1.0

doc/developers-faqs.md

@@ -93,6 +93,7 @@ This action will automatically perform the following steps:
 | `<pkg>_CONDA_PKG_NAME`  | The name that will be used for the conda package name. The convention is to use lowercase names separated by dashes. | The name of the github repo of the package. | 
 | `<pkg>_CONDA_DEPENDENCIES` | The list of conda-forge dependencies required by this package. Note that dependencies managed by the robotology-superbuild should not be listed, as those are handled automatically. | The default value is empty. |
 | `<pkg>_CONDA_RUN_DEPENDENCIES_EXPLICIT` | The list of conda-forge run dependencies required by this package. Note that most C++ dependencies are not required as they have run_exports to automatically handle this, but this may be required for Python dependencies. | The default value is empty. |
+| `<pkg>_CONDA_BUILD_DEPENDENCIES_EXPLICIT` | The list of conda-forge build dependencies required by this package. Note that it is not necessary to explicitly add C/C++ compilers, `cmake`, `ninja`, `pkg-config` and `make`, as they are added automatically. |
 | `<pkg>_CONDA_VERSION` | The version that will be used for the conda package, by default it is not set as the value from the tag will be extracted. | The default value is to use the value of the tag, removing any occurence of the `v` letter. |
 | `<pkg>_CONDA_ENTRY_POINTS` | This option permits to specify explicitly the entry_points used by a pure_python package (see https://github.com/robotology/robotology-superbuild/issues/1105). | Empty. |