WIP pixi from pyproj [ci skip]

Author: drammock

tools/write-pixi-toml.py

@@ -0,0 +1,32 @@
+import tomlkit
+import tomllib
+
+with open("../pyproject.toml", "rb") as fid:
+    foo = tomllib.load(fid)
+
+# in keys: build-system, dependency-groups, project, tool
+
+# out keys: workspace, dependencies, pypi-dependencies (may need tasks)
+out = dict()
+workspace = dict(
+    authors=["MNE-Python contributors"],
+    channels=["conda-forge"],
+    name=foo["project"]["name"],
+    platforms=["osx-64"],
+    version="0.1.0",
+)
+dependencies = foo["project"]["dependencies"]
+dependencies.extend(foo["dependency-groups"]["test"])
+dependencies.extend(foo["dependency-groups"]["test_extra"])
+dependencies.extend(foo["project"]["optional-dependencies"]["hdf5"])
+dependencies.extend(foo["project"]["optional-dependencies"]["full-no-qt"])
+dependencies.extend(foo["project"]["optional-dependencies"]["full-pyside6"])
+dependencies = list(
+    filter(lambda x: isinstance(x, str) and "mne[" not in x, dependencies)
+)
+dependencies = sorted(set(dependencies))
+
+out = {"workspace": workspace, "dependencies": dependencies, "pypi-dependencies": []}
+
+with open("pixi-new.toml", "w") as fid:
+    tomlkit.dump(out, fid, sort_keys=True)