git: Don't swallow all push output

In certain situations "git push" will need to auth interactively. However
we don't show the user any output from git push because of github's automatic
"create a pr test" that is generally not what we want since revup handles pr
creation. This does make these auth situations confusing though.

Instead of hiding all output, default to showing output except for lines prefixed
with "remote:" which will get hidden.

Topic: outpush3
Closes: #33
Reviewers: aaron, brian-k

revup/shell.py

@@ -8,6 +8,7 @@
 from typing import (
     IO,
     Any,
+    Callable,
     Coroutine,
     Dict,
     List,
@@ -45,7 +46,10 @@ def merge_dicts(x: Dict[K, V], y: Dict[K, V]) -> Dict[K, V]:
 
 
 async def process_stream(
-    proc_stream: Optional[asyncio.StreamReader], setting: _HANDLE, default_stream: IO[str]
+    proc_stream: Optional[asyncio.StreamReader],
+    setting: _HANDLE,
+    default_stream: IO[str],
+    transform: Optional[Callable],
 ) -> bytes:
     # The things we do for logging...
     #
@@ -68,14 +72,16 @@ async def process_stream(
             line = await proc_stream.readexactly(e.consumed)
         except asyncio.IncompleteReadError as e:
             line = e.partial
+        if transform:
+            line = transform(line)
         if not line:
-            if isinstance(setting, int) and setting != -1:
+            if isinstance(setting, int) and setting not in (-1, subprocess.PIPE, subprocess.STDOUT):
                 os.close(setting)
             break
         if setting == subprocess.PIPE:
             output.append(line)
         elif setting == subprocess.STDOUT:
-            sys.stdout.buffer.write(line)
+            logging.info(line.decode("utf-8").strip())
         elif isinstance(setting, int) and setting != -1:
             os.write(setting, line)
         elif setting is None:
@@ -137,6 +143,7 @@ async def create_sh_task(
         input_str: Optional[str] = None,
         stdin: _HANDLE = None,
         stdout: _HANDLE = subprocess.PIPE,
+        output_transform: Optional[Callable] = None,
     ) -> Tuple[
         Coroutine[Any, Any, None],
         Coroutine[Any, Any, bytes],
@@ -163,8 +170,8 @@ async def create_sh_task(
 
         return (
             feed_input(ret.stdin, input_str),
-            process_stream(ret.stdout, stdout, sys.stdout),
-            process_stream(ret.stderr, stderr, sys.stderr),
+            process_stream(ret.stdout, stdout, sys.stdout, output_transform),
+            process_stream(ret.stderr, stderr, sys.stderr, output_transform),
             ret.wait(),
         )
 
@@ -179,6 +186,7 @@ async def sh(
         stdout: _HANDLE = subprocess.PIPE,
         raiseonerror: bool = True,
         quiet: bool = False,
+        output_transform: Optional[Callable] = None,
     ) -> Tuple[int, str]:
         """
         Run a command specified by args, and return string representing
@@ -210,6 +218,7 @@ async def sh(
             input_str=input_str,
             stdin=stdin,
             stdout=stdout,
+            output_transform=output_transform,
         )
 
         _, out, err, ret = await asyncio.gather(*tasks)

revup/topic_stack.py

@@ -1039,7 +1039,13 @@ async def push_git_refs(self, uploader: str, create_local_branches: bool) -> Non
                 self.git_ctx.remote_name,
                 *push_targets,
             ]
-            await self.git_ctx.git(*push_args, stderr=subprocess.PIPE)
+            await self.git_ctx.git(
+                *push_args,
+                stdout=subprocess.STDOUT,
+                stderr=subprocess.STDOUT,
+                # Hide the remote output that says "Create a pull request for '' on GitHub"
+                output_transform=lambda l: b"" if l.startswith(b"remote: ") else l,
+            )
 
     async def query_github(self) -> None:
         """