FeatureNew: add mypy type annotations for subproject arg

Use a derived type when passing `subproject` around, so that mypy knows
it's actually a SubProject, not a str. This means that passing anything
other than a handle to the interpreter state's subproject attribute
becomes a type violation, specifically when the order of the *four*
different str arguments is typoed.

1 files changed, 2 insertions, 1 deletions

diff --git a/mesonbuild/wrap/wrap.py b/mesonbuild/wrap/wrap.py
index 21eb9d6..51632fd 100644
--- a/mesonbuild/wrap/wrap.py
+++ b/mesonbuild/wrap/wrap.py
@@ -35,6 +35,7 @@ from . import WrapMode
 from .. import coredata
 from ..mesonlib import quiet_git, GIT, ProgressBar, MesonException, windows_proof_rmtree
 from ..interpreterbase import FeatureNew
+from ..interpreterbase import SubProject
 from .. import mesonlib
 
 if T.TYPE_CHECKING:
@@ -95,7 +96,7 @@ class WrapNotFoundException(WrapException):
 class PackageDefinition:
     def __init__(self, fname: str, subproject: str = ''):
         self.filename = fname
-        self.subproject = subproject
+        self.subproject = SubProject(subproject)
         self.type = None  # type: T.Optional[str]
         self.values = {} # type: T.Dict[str, str]
         self.provided_deps = {} # type: T.Dict[str, T.Optional[str]]