Declare install deps and lazy-load missing fvsfunc

kagefunc.py

@@ -2,10 +2,10 @@
 kageru’s collection of vapoursynth functions.
 """
 from functools import partial
-from vsutil import *
-import vapoursynth as vs
+
 import mvsfunc as mvf
-import fvsfunc as fvf
+import vapoursynth as vs
+from vsutil import *
 
 core = vs.core
 
@@ -67,6 +67,11 @@ def inverse_scale(
     planes = _descale_chroma(planes, width, height)
 
     if mask_detail:
+        try:
+            import fvsfunc as fvf
+        except ImportError as e:
+            raise ImportError("Missing required dependency: `fvsfunc`") from e
+
         upscaled = fvf.Resize(planes[0], source.width, source.height, kernel=kernel, taps=taps, a1=b, a2=c)
         planes[0] = mask_descale(get_y(source), planes[0], upscaled, zones=descale_mask_zones)
     scaled = join(planes)
@@ -90,6 +95,11 @@ def mask_descale(
     zones: str = '',
     debug: bool = False,
 ):
+    try:
+        import fvsfunc as fvf
+    except ImportError as e:
+        raise ImportError("Missing required dependency: `fvsfunc`") from e
+
     downscaled = core.resize.Spline36(original, descaled.width, descaled.height)
     assert get_depth(original) == get_depth(descaled), "Source and descaled clip need to have the same bitdepth"
     detail_mask = _generate_descale_mask(original, descaled, upscaled, threshold)

pyproject.toml

@@ -8,13 +8,18 @@ version = "1.0.1"
 description = "kageru's collection of VapourSynth functions"
 readme = "README.md"
 license = { file = "LICENSE" }
-requires-python = ">=3.8"
+requires-python = ">=3.12"
 dependencies = [
     "vapoursynth",
     "vsutil",
     "vapoursynth-adaptivegrain",
+    "mvsfunc",
 ]
 
+[tool.uv.sources]
+mvsfunc = { git = "https://github.com/HomeOfVapourSynthEvolution/mvsfunc.git" }
+
+
 [project.urls]
 Homepage = "https://github.com/Irrational-Encoding-Wizardry/kagefunc"