python_doc = py_mod.find_installation(
  'python3',
  modules: ['sphinx', 'numpydoc'],
  required: false
)

if not python_doc.found()
  subdir_done()
endif

doc_files = files(
  'index.rst',
  'discretization.rst',
  'api.rst',
  'conf.py',
)

custom_target('doc',
  command: [python_doc, '-msphinx',
    '-q',                       # quiet
    '-E',                       # rebuild from scratch
    '-j', 'auto',               # parallel build
    '-d', '@PRIVATE_DIR@',      # doctrees dir
    '@CURRENT_SOURCE_DIR@',     # source dir
    '@OUTPUT@',                 # output dir
  ],
  depend_files: [doc_files, usadelndsoc_sources],
  depends: [usadelndsoc_pymod],
  output: 'html',
  build_by_default: true,
)