lib.ExecContext: Support bytes-typed cmd_input

The Input instance passed as cmd_input to ExecContext.run() and
.sudo() currently may be of type str. Allow to pass bytes, too.

At the same time, disallow None to be passed as cmd_input. Force the
caller to be more explicit how it wants input to be handled, notably
with respect to interactivity.

Along the way fix a bug: Content in cmd_input should result in
CallContext.interactive == False but doesn't. Fix that.

Signed-off-by: Jan Lindemann <jan@janware.com>

src/python/jw/pkg/lib/ec/Local.py

@@ -18,7 +18,7 @@ class Local(Base):
         cmd: list[str],
         wd: str|None,
         verbose: bool,
-        cmd_input: str|None,
+        cmd_input: bytes|None,
         env: dict[str, str]|None,
         interactive: bool,
         log_prefix: str
@@ -116,7 +116,7 @@ class Local(Base):
             ]
 
             if stdin is asyncio.subprocess.PIPE:
-                proc.stdin.write(cmd_input.encode(sys.stdout.encoding or "utf-8"))
+                proc.stdin.write(cmd_input)
                 await proc.stdin.drain()
                 proc.stdin.close()
 
@@ -134,7 +134,7 @@ class Local(Base):
 
     async def _sudo(self, cmd: list[str], mod_env: dict[str, str], opts: list[str], *args, **kwargs) -> Result:
         env: dict[str, str]|None = None
-        cmd_input: str|None = None
+        cmd_input: bytes|None = None
         if mod_env:
             env = os.environ.copy()
             env.update(mod_env)