src/python/jw/pkg/lib/ExecContext.py

@@ -313,7 +313,7 @@ class ExecContext(Base):
         await self.open()
 
         try:
-            ret = Result(None, None, 1)
+            ret = Result()
             with self.CallContext(
                     self,
                     title = title,
@@ -421,7 +421,7 @@ class ExecContext(Base):
         # be returned by CallContext and is very much allowed
         assert cmd_input is not None, 'Invalid: cmd_input is None'
 
-        ret = Result(None, None, 1)
+        ret = Result()
         with self.CallContext(
                 self,
                 title = title,
@@ -454,7 +454,7 @@ class ExecContext(Base):
     async def _get(
         self, path: str, wd: str | None, throw: bool, verbose: bool | None, title: str
     ) -> Result:
-        ret = Result(None, None, 1)
+        ret = Result()
         if wd is not None:
             path = wd + '/' + path
         with self.CallContext(
@@ -508,7 +508,7 @@ class ExecContext(Base):
         ) -> Result:
             return await self.run(cmd, cmd_input = cmd_input, **kwargs)
 
-        ret = Result(None, None, 1)
+        ret = Result()
         try:
 
             class RemoteCmd(NamedTuple):

src/python/jw/pkg/lib/Result.py

@@ -4,9 +4,9 @@ class Result:
 
     def __init__(
         self,
-        stdout: bytes | None,
-        stderr: bytes | None,
-        status: int,
+        stdout: bytes | None = None,
+        stderr: bytes | None = None,
+        status: int | None = None,  # Command has not yet exited
         encoding: str = 'UTF-8',
         strip: bool = True,
         cmd: list[str] | None = None,
@@ -56,6 +56,7 @@ class Result:
 
     def __repr__(self) -> str:
         ret = f'{self.__status}:'
+        if self.__status is not None:
             if self.status != 0:
                 ret += f' err: {self.stderr_str_or_none}'
             else:
@@ -104,7 +105,10 @@ class Result:
             if wd is None:
                 wd = self.__wd
             call = f'"{pretty_cmd(cmd, wd)}" '
-        ret = f'Command {call}has exited with status {self.__status}'
+        ret = (
+            f'Command {call}has not yet exited' if self.__status is None else
+            f'Command {call}has exited with status {self.__status}'
+        )
         call = pretty_cmd(cmd, wd)
         if self.status != 0:
             ret += f' -> stderr="{self.__stderr!r}"'
@@ -125,6 +129,8 @@ class Result:
     @property
     def stdout(self) -> bytes:
         if self.__stdout is None:
+            if self.__status == 0:
+                return b''
             raise Exception(f'Result has no standard output stream: {self.summary}')
         return self.__stdout
 
@@ -143,6 +149,8 @@ class Result:
     @property
     def stderr(self) -> bytes:
         if self.__stderr is None:
+            if isinstance(self.__status, int) and self.__status != 0:
+                return b''
             raise Exception(f'Result has no standard error stream: {self.summary}')
         return self.__stderr