And for the record, the preset is indeed enabled in the renovate config:

Still not quite there, on main for alpine:

2025-02-13T15:03:19.8590663Z #17 [build 9/9] RUN cmake -B build -DAUTOLOAD_DIR=/usr/lib/gdalplugins -DBUILD_TESTING=OFF &&     cmake --build build &&     cmake --install build
2025-02-13T15:03:19.8591791Z #17 0.052 CMake Error: The source directory "/src/gdal-grass" does not appear to contain CMakeLists.txt.
2025-02-13T15:03:19.8592636Z #17 0.052 Specify --help for usage, or press the help button on the CMake GUI.
2025-02-13T15:03:19.8593838Z #17 ERROR: process "/bin/sh -c cmake -B build -DAUTOLOAD_DIR=/usr/lib/gdalplugins -DBUILD_TESTING=OFF &&     cmake --build build &&     cmake --install build" did not complete successfully: exit code: 1
2025-02-13T15:03:19.8850378Z ------
2025-02-13T15:03:19.8851576Z  > [build 9/9] RUN cmake -B build -DAUTOLOAD_DIR=/usr/lib/gdalplugins -DBUILD_TESTING=OFF &&     cmake --build build &&     cmake --install build:
2025-02-13T15:03:19.8854888Z 0.052 CMake Error: The source directory "/src/gdal-grass" does not appear to contain CMakeLists.txt.
2025-02-13T15:03:19.8855825Z 0.052 Specify --help for usage, or press the help button on the CMake GUI.

We need that test job for PRs. Do we change build and Docker things in every PR? No, but we do change them often enough.

We need that test job for PRs. Do we change build and Docker things in every PR? No, but we do change them often enough.

The way that workflow is written, it is maybe not that safe to just add a different trigger as is.
Some changes are needed to make sure it isn't allowed to try to push when it is a PR.

Still not quite there, on main for alpine:

2025-02-13T15:03:19.8590663Z #17 [build 9/9] RUN cmake -B build -DAUTOLOAD_DIR=/usr/lib/gdalplugins -DBUILD_TESTING=OFF &&     cmake --build build &&     cmake --install build

2025-02-13T15:03:19.8591791Z #17 0.052 CMake Error: The source directory "/src/gdal-grass" does not appear to contain CMakeLists.txt.

2025-02-13T15:03:19.8592636Z #17 0.052 Specify --help for usage, or press the help button on the CMake GUI.

2025-02-13T15:03:19.8593838Z #17 ERROR: process "/bin/sh -c cmake -B build -DAUTOLOAD_DIR=/usr/lib/gdalplugins -DBUILD_TESTING=OFF &&     cmake --build build &&     cmake --install build" did not complete successfully: exit code: 1

2025-02-13T15:03:19.8850378Z ------

2025-02-13T15:03:19.8851576Z  > [build 9/9] RUN cmake -B build -DAUTOLOAD_DIR=/usr/lib/gdalplugins -DBUILD_TESTING=OFF &&     cmake --build build &&     cmake --install build:

2025-02-13T15:03:19.8854888Z 0.052 CMake Error: The source directory "/src/gdal-grass" does not appear to contain CMakeLists.txt.

2025-02-13T15:03:19.8855825Z 0.052 Specify --help for usage, or press the help button on the CMake GUI.

I think I know what's going on. The repo is cloned into src/gdal-grass and then the workdir is set to /src/gdal-grass. I think the repo is cloned relative to the working directory that was active when that step was run, and it isn't absolute. So, cmake runs in an empty directory tree.