[PATCH 2 of 2 STABLE] ui: enable echo back of prompt response only in tests (issue4417)

[Yuya Nishihara]

# HG changeset patch
# User Yuya Nishihara <yuya at tcha.org>
# Date 1413694842 -32400
#      Sun Oct 19 14:00:42 2014 +0900
# Branch stable
# Node ID c5b0405c9f23896ad4440899836f13a18e9d9390
# Parent  7ce8b804b319af65322c0ab345f21d289f92c63f
ui: enable echo back of prompt response only in tests (issue4417)

9ab18a912c44 isn't always good.  Some tools will want to see the prompt
choice:

    $ yes | hg xxx > output.log

but others won't:

    p = Popen('hg xxx', stdin=PIPE, stdout=PIPE)
    do_some_interactive_thing(p)

Since it could break output parsing of existing scripts, ui.simulatettyecho
is changed to be off by default.

diff --git a/mercurial/commandserver.py b/mercurial/commandserver.py
--- a/mercurial/commandserver.py
+++ b/mercurial/commandserver.py
@@ -196,9 +196,6 @@ class server(object):
         for ui in uis:
             # any kind of interaction must use server channels
             ui.setconfig('ui', 'nontty', 'true', 'commandserver')
-            # echo-back message shouldn't be written because a client
-            # typically have to parse the output
-            ui.setconfig('ui', 'simulatettyecho', 'false', 'commandserver')
 
         req = dispatch.request(args[:], copiedui, self.repo, self.cin,
                                self.cout, self.cerr)
diff --git a/mercurial/ui.py b/mercurial/ui.py
--- a/mercurial/ui.py
+++ b/mercurial/ui.py
@@ -714,7 +714,7 @@ class ui(object):
             # sometimes self.interactive disagrees with isatty,
             # show response provided on stdin when simulating
             if (not util.isatty(self.fin)
-                and self.configbool('ui', 'simulatettyecho', True)):
+                and self.configbool('ui', 'simulatettyecho')):
                 self.write(r, "\n")
             return r
         except EOFError:
diff --git a/tests/run-tests.py b/tests/run-tests.py
--- a/tests/run-tests.py
+++ b/tests/run-tests.py
@@ -681,6 +681,7 @@ class Test(unittest.TestCase):
         hgrc.write('slash = True\n')
         hgrc.write('interactive = False\n')
         hgrc.write('mergemarkers = detailed\n')
+        hgrc.write('simulatettyecho = True\n')
         hgrc.write('[defaults]\n')
         hgrc.write('backout = -d "0 0"\n')
         hgrc.write('commit = -d "0 0"\n')
diff --git a/tests/test-basic.t b/tests/test-basic.t
--- a/tests/test-basic.t
+++ b/tests/test-basic.t
@@ -8,6 +8,7 @@ Create a repository:
   ui.slash=True
   ui.interactive=False
   ui.mergemarkers=detailed
+  ui.simulatettyecho=True
   $ hg init t
   $ cd t
 
diff --git a/tests/test-commandserver.t b/tests/test-commandserver.t
--- a/tests/test-commandserver.t
+++ b/tests/test-commandserver.t
@@ -5,6 +5,12 @@
 #endif
   $ export PYTHONPATH
 
+typical client does not want echo-back messages, so test without
+ui.simulatettyecho:
+
+  $ grep -v '^simulatettyecho ' < $HGRCPATH >> $HGRCPATH.new
+  $ mv $HGRCPATH.new $HGRCPATH
+
   $ hg init repo
   $ cd repo
 
@@ -178,7 +184,6 @@ check that local configs for the cached 
   ui.mergemarkers=detailed
   ui.foo=bar
   ui.nontty=true
-  ui.simulatettyecho=false
   *** runcommand init foo
   *** runcommand -R foo showconfig ui defaults
   defaults.backout=-d "0 0"
@@ -189,7 +194,6 @@ check that local configs for the cached 
   ui.interactive=False
   ui.mergemarkers=detailed
   ui.nontty=true
-  ui.simulatettyecho=false
 
   $ rm -R foo