[Request] [+ ] D8584: sshpeer: make client print (likely) server errors on stderr

[valentin.gatienbaron (Valentin Gatien-Baron)]

valentin.gatienbaron created this revision.
Herald added a reviewer: hg-reviewers.
Herald added a subscriber: mercurial-patches.

REVISION SUMMARY
  so `hg clone -q` or `hg pull -q` don't print `abort: no suitable
  response from remote hg!` with no indication of what went wrong.
  
  There are other errors still silenced by -q (like failing to push due
  to a server hook), but the current change covers a good fraction of
  the problem (all errors setting up the ssh connection, no such remote
  repository, no access to the repository).

REPOSITORY
  rHG Mercurial

BRANCH
  default

REVISION DETAIL
  https://phab.mercurial-scm.org/D8584

AFFECTED FILES
  mercurial/sshpeer.py
  tests/test-ssh.t

CHANGE DETAILS

diff --git a/tests/test-ssh.t b/tests/test-ssh.t
--- a/tests/test-ssh.t
+++ b/tests/test-ssh.t
@@ -47,6 +47,7 @@
   abort: no suitable response from remote hg!
   [255]
   $ hg clone -q -e "\"$PYTHON\" \"$TESTDIR/dummyssh\"" ssh://user@dummy/nonexistent local
+  remote: abort: repository nonexistent not found!
   abort: no suitable response from remote hg!
   [255]
 
diff --git a/mercurial/sshpeer.py b/mercurial/sshpeer.py
--- a/mercurial/sshpeer.py
+++ b/mercurial/sshpeer.py
@@ -36,15 +36,16 @@
     return b"'%s'" % s.replace(b"'", b"'\\''")
 
 
-def _forwardoutput(ui, pipe):
+def _forwardoutput(ui, pipe, warn=False):
     """display all data currently available on pipe as remote output.
 
     This is non blocking."""
     if pipe:
         s = procutil.readpipe(pipe)
         if s:
+            display = ui.warn if warn else ui.status
             for l in s.splitlines():
-                ui.status(_(b"remote: "), l, b'\n')
+                display(_(b"remote: "), l, b'\n')
 
 
 class doublepipe(object):
@@ -204,8 +205,12 @@
 
 def _performhandshake(ui, stdin, stdout, stderr):
     def badresponse():
-        # Flush any output on stderr.
-        _forwardoutput(ui, stderr)
+        # Flush any output on stderr. In general, the stderr contains errors
+        # from the remote (ssh errors, some hg errors), and status indications
+        # (like "adding changes"), with no current way to tell them apart.
+        # Here we failed so early that it's almost certainly only errors, so
+        # use warn=True so -q doesn't hide them.
+        _forwardoutput(ui, stderr, warn=True)
 
         msg = _(b'no suitable response from remote hg')
         hint = ui.config(b'ui', b'ssherrorhint')
@@ -307,7 +312,7 @@
     while lines[-1] and max_noise:
         try:
             l = stdout.readline()
-            _forwardoutput(ui, stderr)
+            _forwardoutput(ui, stderr, warn=True)
 
             # Look for reply to protocol upgrade request. It has a token
             # in it, so there should be no false positives.
@@ -374,7 +379,7 @@
         badresponse()
 
     # Flush any output on stderr before proceeding.
-    _forwardoutput(ui, stderr)
+    _forwardoutput(ui, stderr, warn=True)
 
     return protoname, caps
 



To: valentin.gatienbaron, #hg-reviewers
Cc: mercurial-patches, mercurial-devel
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