RBniCSx installation error

installation
1

Good evening,

I cannot install RBniCSx.

After I run

git clone https://github.com/RBniCS/RBniCSx
cd RBniCSx
python3 -m pip install .

I get the following error:

Processing /mnt/c/RBniCSx
  Installing build dependencies ... error
  error: subprocess-exited-with-error

  × pip subprocess to install build dependencies did not run successfully.
  │ exit code: 1
  ╰─> [88 lines of output]
      Collecting nanobind>=1.8.0
        Using cached nanobind-1.9.2-py3-none-any.whl.metadata (1.4 kB)
      Collecting petsc4py
        Using cached petsc4py-3.21.0.tar.gz (415 kB)
        Preparing metadata (setup.py): started
        Preparing metadata (setup.py): finished with status 'done'
      Collecting scikit-build-core[pyproject]
        Using cached scikit_build_core-0.8.2-py3-none-any.whl.metadata (19 kB)
      Collecting numpy (from petsc4py)
        Using cached numpy-1.26.4-cp312-cp312-manylinux_2_17_x86_64.manylinux2014_x86_64.whl.metadata (61 kB)
      Collecting petsc<3.22,>=3.21 (from petsc4py)
        Using cached petsc-3.21.0.tar.gz (17.3 MB)
        Preparing metadata (setup.py): started
        Preparing metadata (setup.py): finished with status 'done'
      Collecting packaging>=20.9 (from scikit-build-core[pyproject])
        Using cached packaging-24.0-py3-none-any.whl.metadata (3.2 kB)
      Collecting pathspec>=0.10.1 (from scikit-build-core[pyproject])
        Using cached pathspec-0.12.1-py3-none-any.whl.metadata (21 kB)
      Collecting pyproject-metadata>=0.5 (from scikit-build-core[pyproject])
        Using cached pyproject_metadata-0.7.1-py3-none-any.whl.metadata (3.0 kB)
      Using cached nanobind-1.9.2-py3-none-any.whl (192 kB)
      Using cached packaging-24.0-py3-none-any.whl (53 kB)
      Using cached pathspec-0.12.1-py3-none-any.whl (31 kB)
      Using cached pyproject_metadata-0.7.1-py3-none-any.whl (7.4 kB)
      Using cached numpy-1.26.4-cp312-cp312-manylinux_2_17_x86_64.manylinux2014_x86_64.whl (18.0 MB)
      Using cached scikit_build_core-0.8.2-py3-none-any.whl (140 kB)
      Building wheels for collected packages: petsc4py, petsc
        Building wheel for petsc4py (setup.py): started
        Building wheel for petsc4py (setup.py): finished with status 'error'
        error: subprocess-exited-with-error

        × python setup.py bdist_wheel did not run successfully.
        │ exit code: 1
        ╰─> [34 lines of output]
            running bdist_wheel
            PETSC_DIR not specified
            running build
            running build_src
            fetching build requirement 'Cython >= 3.0.0'
            using Cython 3.0.10
            cythonizing 'petsc4py/PETSc.pyx' -> 'petsc4py/PETSc.c'
            running build_py
            creating build
            creating build/lib.linux-x86_64-cpython-312
            creating build/lib.linux-x86_64-cpython-312/petsc4py
            copying src/petsc4py/__main__.py -> build/lib.linux-x86_64-cpython-312/petsc4py
            copying src/petsc4py/typing.py -> build/lib.linux-x86_64-cpython-312/petsc4py
            copying src/petsc4py/PETSc.py -> build/lib.linux-x86_64-cpython-312/petsc4py
            copying src/petsc4py/__init__.py -> build/lib.linux-x86_64-cpython-312/petsc4py
            creating build/lib.linux-x86_64-cpython-312/petsc4py/lib
            copying src/petsc4py/lib/__init__.py -> build/lib.linux-x86_64-cpython-312/petsc4py/lib
            copying src/petsc4py/__main__.pyi -> build/lib.linux-x86_64-cpython-312/petsc4py
            copying src/petsc4py/__init__.pyi -> build/lib.linux-x86_64-cpython-312/petsc4py
            copying src/petsc4py/py.typed -> build/lib.linux-x86_64-cpython-312/petsc4py
            copying src/petsc4py/PETSc.pxd -> build/lib.linux-x86_64-cpython-312/petsc4py
            copying src/petsc4py/PETSc.h -> build/lib.linux-x86_64-cpython-312/petsc4py
            copying src/petsc4py/PETSc_api.h -> build/lib.linux-x86_64-cpython-312/petsc4py
            creating build/lib.linux-x86_64-cpython-312/petsc4py/include
            creating build/lib.linux-x86_64-cpython-312/petsc4py/include/petsc4py
            copying src/petsc4py/include/petsc4py/numpy.h -> build/lib.linux-x86_64-cpython-312/petsc4py/include/petsc4py
            copying src/petsc4py/include/petsc4py/pyscalar.h -> build/lib.linux-x86_64-cpython-312/petsc4py/include/petsc4py
            copying src/petsc4py/include/petsc4py/pybuffer.h -> build/lib.linux-x86_64-cpython-312/petsc4py/include/petsc4py
            copying src/petsc4py/include/petsc4py/petsc4py.h -> build/lib.linux-x86_64-cpython-312/petsc4py/include/petsc4py
            copying src/petsc4py/include/petsc4py/petsc4py.i -> build/lib.linux-x86_64-cpython-312/petsc4py/include/petsc4py
            copying src/petsc4py/lib/__init__.pyi -> build/lib.linux-x86_64-cpython-312/petsc4py/lib
            copying src/petsc4py/lib/petsc.cfg -> build/lib.linux-x86_64-cpython-312/petsc4py/lib
            running build_ext
            error: PETSc not found
            [end of output]

        note: This error originates from a subprocess, and is likely not a problem with pip.
        ERROR: Failed building wheel for petsc4py
        Running setup.py clean for petsc4py
        Building wheel for petsc (setup.py): started
        Building wheel for petsc (setup.py): finished with status 'error'
        error: subprocess-exited-with-error

        × python setup.py bdist_wheel did not run successfully.
        │ exit code: 1
        ╰─> [1 lines of output]
            petsc: this package cannot be built as a wheel
            [end of output]

        note: This error originates from a subprocess, and is likely not a problem with pip.
        ERROR: Failed building wheel for petsc
        Running setup.py clean for petsc
      Failed to build petsc4py petsc
      ERROR: Could not build wheels for petsc4py, petsc, which is required to install pyproject.toml-based projects
      [end of output]

  note: This error originates from a subprocess, and is likely not a problem with pip.
error: subprocess-exited-with-error

× pip subprocess to install build dependencies did not run successfully.
│ exit code: 1
╰─> See above for output.

note: This error originates from a subprocess, and is likely not a problem with pip.

I can see the problem is related to petsc and petsc4py.

When I run

pip install petsc4py

I get

Requirement already satisfied: petsc4py in /home/carlo/anaconda3/envs/fenicsx-env/lib/python3.12/site-packages (3.20.4)
Requirement already satisfied: numpy in /home/carlo/anaconda3/envs/fenicsx-env/lib/python3.12/site-packages (from petsc4py) (1.26.3)

However, when I try to run

pip install petsc

I get

Collecting petsc
  Using cached petsc-3.21.0.tar.gz (17.3 MB)
  Preparing metadata (setup.py) ... done
Building wheels for collected packages: petsc
  Building wheel for petsc (setup.py) ... error
  error: subprocess-exited-with-error

  × python setup.py bdist_wheel did not run successfully.
  │ exit code: 1
  ╰─> [1 lines of output]
      petsc: this package cannot be built as a wheel
      [end of output]

  note: This error originates from a subprocess, and is likely not a problem with pip.
  ERROR: Failed building wheel for petsc
  Running setup.py clean for petsc
Failed to build petsc
ERROR: Could not build wheels for petsc, which is required to install pyproject.toml-based projects

Indeed I installed petsc through

conda install -c conda-forge petsc

And everything seems to work fine, indeed I get:

Channels:
 - conda-forge
 - defaults
Platform: linux-64
Collecting package metadata (repodata.json): done
Solving environment: done

# All requested packages already installed.

I cannot understand what is the problem related to petsc, and therefore with the installation of RBniCSx.

Thank you for your help.

2

Please follow the same installation instructions as multiphenicsx, see Installation — multiphenicsx

I should create a RBniCSx website with those installation instructions, but this is a busy period and doing so is not a high priority on my todo list.

3

It worked, thank you!