refactor(codegen): move dfn utils from devtools (#2508)

To avoid the dependency on a development branch of modflow-devtools, copy over the DFN parser, TOML conversion script, etc for now. Also include the necessary transitive dependencies. Workaround for 3.9.3's failure to launch.

Author: wpbonelli

flopy/mf6/utils/codegen/__init__.py

@@ -103,7 +103,7 @@ def make_all(dfndir: Path, outdir: PathLike, verbose: bool = False, version: int
 
     # import here instead of module so we don't
     # expect optional deps at module init time
-    from modflow_devtools.dfn import Dfn
+    from flopy.mf6.utils.dfn import Dfn
 
     dfns = Dfn.load_all(dfndir, version=version)
     make_init(dfns, outdir, verbose)

flopy/mf6/utils/codegen/component.py

@@ -3,7 +3,7 @@
     TypedDict,
 )
 
-from modflow_devtools.dfn import Dfn
+from flopy.mf6.utils.dfn import Dfn
 
 
 def get_component_names(dfn: dict) -> list[tuple[str, str]]:

flopy/mf6/utils/codegen/filters.py

@@ -233,7 +233,7 @@ def attrs(dfn: dict, component_name: tuple[str, str]) -> List[str]:
         where applicable. TODO: this should get much simpler if we can drop
         all the `ListTemplateGenerator`/`ArrayTemplateGenerator` attributes.
         """
-        from modflow_devtools.dfn import _MF6_SCALARS, Dfn
+        from flopy.mf6.utils.dfn import _MF6_SCALARS, Dfn
 
         component_base = Filters.base(component_name)
         component_vars = _get_vars(dfn)