ExecutableSerialisation: capture and feed are optional strings

capture is the optional filename stdout is redirected to.
feed is the optional filename stdin reads from.

mesonbuild/backend/backends.py

@@ -510,8 +510,8 @@ class Backend:
             self, cmd: T.Sequence[T.Union[programs.ExternalProgram, build.BuildTarget, build.CustomTarget, File, str]],
             workdir: T.Optional[str] = None,
             extra_bdeps: T.Optional[T.List[build.BuildTarget]] = None,
-            capture: T.Optional[bool] = None,
-            feed: T.Optional[bool] = None,
+            capture: T.Optional[str] = None,
+            feed: T.Optional[str] = None,
             env: T.Optional[mesonlib.EnvironmentVariables] = None,
             tag: T.Optional[str] = None,
             verbose: bool = False,
@@ -582,8 +582,8 @@ class Backend:
                              cmd_args: T.Sequence[T.Union[str, mesonlib.File, build.BuildTarget, build.CustomTarget, programs.ExternalProgram]],
                              workdir: T.Optional[str] = None,
                              extra_bdeps: T.Optional[T.List[build.BuildTarget]] = None,
-                             capture: T.Optional[bool] = None,
-                             feed: T.Optional[bool] = None,
+                             capture: T.Optional[str] = None,
+                             feed: T.Optional[str] = None,
                              force_serialize: bool = False,
                              env: T.Optional[mesonlib.EnvironmentVariables] = None,
                              verbose: bool = False) -> T.Tuple[T.Sequence[T.Union[str, File, build.Target, programs.ExternalProgram]], str]:
@@ -638,9 +638,9 @@ class Backend:
                 return es.cmd_args, ''
             args: T.List[str] = []
             if capture:
-                args += ['--capture', str(capture)]
+                args += ['--capture', capture]
             if feed:
-                args += ['--feed', str(feed)]
+                args += ['--feed', feed]
 
             return (
                 self.environment.get_build_command() + ['--internal', 'exe'] + args + ['--'] + es.cmd_args,

mesonbuild/utils/core.py

@@ -141,15 +141,13 @@ class EnvironmentVariables(HoldableObject):
 @dataclass(eq=False)
 class ExecutableSerialisation:
 
-    # XXX: should capture and feed default to False, instead of None?
-
     cmd_args: T.List[str]
     env: T.Optional[EnvironmentVariables] = None
     exe_wrapper: T.Optional['programs.ExternalProgram'] = None
     workdir: T.Optional[str] = None
     extra_paths: T.Optional[T.List] = None
-    capture: T.Optional[bool] = None
-    feed: T.Optional[bool] = None
+    capture: T.Optional[str] = None
+    feed: T.Optional[str] = None
     tag: T.Optional[str] = None
     verbose: bool = False
     installdir_map: T.Optional[T.Dict[str, str]] = None