bundle2: disable ouput capture unless we use http (issue4613 issue4615)

The current bundle2 processing was capturing all output. This is nice as it
provide better meta data about what output what, but this was changing two
things:

1) adding a prefix "remote: " to "other" output during local push (issue4613)
2) local and ssh push does not provide real time output anymore (issue4615)

As we are unsure about what form should be used in (1) and how to solve (2) we
disable output capture in this two cases. Output capture can be forced using an
experimental option.

mercurial/bundle2.py

@@ -268,12 +268,13 b' class bundleoperation(object):'
     * a way to construct a bundle response when applicable.
     """
 
-    def __init__(self, repo, transactiongetter):
+    def __init__(self, repo, transactiongetter, captureoutput=True):
         self.repo = repo
         self.ui = repo.ui
         self.records = unbundlerecords()
         self.gettransaction = transactiongetter
         self.reply = None
+        self.captureoutput = captureoutput
 
 class TransactionUnavailable(RuntimeError):
     pass
@@ -359,7 +360,7 b' def _processpart(op, part):'
         # parthandlermapping lookup (any KeyError raised by handler()
         # itself represents a defect of a different variety).
         output = None
-        if op.reply is not None:
+        if op.captureoutput and op.reply is not None:
             op.ui.pushbuffer(error=True, subproc=True)
             output = ''
         try:
@@ -840,6 +841,7 b' class interruptoperation(object):'
     def __init__(self, ui):
         self.ui = ui
         self.reply = None
+        self.captureoutput = False
 
     @property
     def repo(self):

mercurial/exchange.py

@@ -1285,6 +1285,11 b' def unbundle(repo, cg, heads, source, ur'
     # need a transaction when processing a bundle2 stream
     wlock = lock = tr = None
     recordout = None
+    # quick fix for output mismatch with bundle2 in 3.4
+    captureoutput = repo.ui.configbool('experimental', 'bundle2-output-capture',
+                                       False)
+    if url.startswith('remote:http:') or url.startswith('remote:https:'):
+        captureoutput = True
     try:
         check_heads(repo, heads, 'uploading changes')
         # push can proceed
@@ -1297,19 +1302,20 b' def unbundle(repo, cg, heads, source, ur'
                 tr.hookargs['source'] = source
                 tr.hookargs['url'] = url
                 tr.hookargs['bundle2'] = '1'
-                op = bundle2.bundleoperation(repo, lambda: tr)
+                op = bundle2.bundleoperation(repo, lambda: tr,
+                                             captureoutput=captureoutput)
                 try:
                     r = bundle2.processbundle(repo, cg, op=op)
                 finally:
                     r = op.reply
-                    if r is not None:
+                    if captureoutput and r is not None:
                         repo.ui.pushbuffer(error=True, subproc=True)
                         def recordout(output):
                             r.newpart('output', data=output, mandatory=False)
                 tr.close()
             except Exception, exc:
                 exc.duringunbundle2 = True
-                if r is not None:
+                if captureoutput and r is not None:
                     parts = exc._bundle2salvagedoutput = r.salvageoutput()
                     def recordout(output):
                         part = bundle2.bundlepart('output', data=output,

tests/test-bundle2-exchange.t

@@ -16,6 +16,7 b' enable obsolescence'
   > [experimental]
   > evolution=createmarkers,exchange
   > bundle2-exp=True
+  > bundle2-output-capture=True
   > [ui]
   > ssh=python "$TESTDIR/dummyssh"
   > logtemplate={rev}:{node|short} {phase} {author} {bookmarks} {desc|firstline}
@@ -667,3 +668,52 b' Check error from hook during the unbundl'
   remote: rollback completed
   abort: pretxnchangegroup hook exited with status 1
   [255]
+
+Check output capture control.
+
+(should be still forced for http, disabled for local and ssh)
+
+  $ cat >> $HGRCPATH << EOF
+  > [experimental]
+  > bundle2-output-capture=False
+  > EOF
+
+  $ hg -R main push other -r e7ec4e813ba6
+  pushing to other
+  searching for changes
+  adding changesets
+  adding manifests
+  adding file changes
+  added 1 changesets with 1 changes to 1 files
+  Fail early!
+  transaction abort!
+  Cleaning up the mess...
+  rollback completed
+  abort: pretxnchangegroup hook exited with status 1
+  [255]
+  $ hg -R main push ssh://user@dummy/other -r e7ec4e813ba6
+  pushing to ssh://user@dummy/other
+  searching for changes
+  abort: pretxnchangegroup hook exited with status 1
+  remote: adding changesets
+  remote: adding manifests
+  remote: adding file changes
+  remote: added 1 changesets with 1 changes to 1 files
+  remote: Fail early!
+  remote: transaction abort!
+  remote: Cleaning up the mess...
+  remote: rollback completed
+  [255]
+  $ hg -R main push http://localhost:$HGPORT2/ -r e7ec4e813ba6
+  pushing to http://localhost:$HGPORT2/
+  searching for changes
+  remote: adding changesets
+  remote: adding manifests
+  remote: adding file changes
+  remote: added 1 changesets with 1 changes to 1 files
+  remote: Fail early!
+  remote: transaction abort!
+  remote: Cleaning up the mess...
+  remote: rollback completed
+  abort: pretxnchangegroup hook exited with status 1
+  [255]