Use correct path separator for MYPYPATH on Windows (#117)

phst · web-flow · commit b9abca71b040 · 2025-08-29T08:11:10.000Z
From https://mypy.readthedocs.io/en/stable/running_mypy.html#how-imports-are-found: > The MYPYPATH environment variable (a list of directories, colon-separated on > UNIX systems, semicolon-separated on Windows).
diff --git a/mypy/private/mypy.bzl b/mypy/private/mypy.bzl
@@ -179,7 +179,7 @@ def _mypy_impl(target, ctx):
         sorted(pyi_dirs)
     )
 
-    mypy_path = ":".join([x for x in path_components if not _should_ignore_import(x)])
+    mypy_path = ctx.configuration.host_path_separator.join([x for x in path_components if not _should_ignore_import(x)])
 
     output_file = ctx.actions.declare_file(ctx.rule.attr.name + ".mypy_stdout")
 

Original file line number	Diff line number	Diff line change
`@@ -179,7 +179,7 @@ def _mypy_impl(target, ctx):`
`179`	`179`	`sorted(pyi_dirs)`
`180`	`180`	`)`
`181`	`181`
`182`		`- mypy_path = ":".join([x for x in path_components if not _should_ignore_import(x)])`
	`182`	`+ mypy_path = ctx.configuration.host_path_separator.join([x for x in path_components if not _should_ignore_import(x)])`
`183`	`183`
`184`	`184`	`output_file = ctx.actions.declare_file(ctx.rule.attr.name + ".mypy_stdout")`
`185`	`185`