[PATCH 1 of 7] scmutil: move util.termwidth()

[Yuya Nishihara]

# HG changeset patch
# User Yuya Nishihara <yuya at tcha.org>
# Date 1476967124 -32400
#      Thu Oct 20 21:38:44 2016 +0900
# Node ID e8790ea449691089861957e8259adb2a753748c8
# Parent  d44c407a59998c0a023e58bc278e19e939185e4f
# EXP-Topic stdio
scmutil: move util.termwidth()

I'm going to get rid of sys.stderr|out|in references from posix.termwidth().
In order to do that, termwidth() needs to take a ui, but functions in util.py
shouldn't depend on a ui object. So moves termwidth() to scmutil.py.

diff --git a/mercurial/posix.py b/mercurial/posix.py
--- a/mercurial/posix.py
+++ b/mercurial/posix.py
@@ -463,36 +463,6 @@ def spawndetached(args):
 def gethgcmd():
     return sys.argv[:1]
 
-def termwidth():
-    try:
-        import array
-        import termios
-        for dev in (sys.stderr, sys.stdout, sys.stdin):
-            try:
-                try:
-                    fd = dev.fileno()
-                except AttributeError:
-                    continue
-                if not os.isatty(fd):
-                    continue
-                try:
-                    arri = fcntl.ioctl(fd, termios.TIOCGWINSZ, '\0' * 8)
-                    width = array.array('h', arri)[1]
-                    if width > 0:
-                        return width
-                except AttributeError:
-                    pass
-            except ValueError:
-                pass
-            except IOError as e:
-                if e[0] == errno.EINVAL:
-                    pass
-                else:
-                    raise
-    except ImportError:
-        pass
-    return 80
-
 def makedir(path, notindexed):
     os.mkdir(path)
 
diff --git a/mercurial/scmposix.py b/mercurial/scmposix.py
--- a/mercurial/scmposix.py
+++ b/mercurial/scmposix.py
@@ -1,5 +1,7 @@
 from __future__ import absolute_import
 
+import errno
+import fcntl
 import os
 import sys
 
@@ -38,3 +40,33 @@ def userrcpath():
         return [encoding.environ['home'] + '/lib/hgrc']
     else:
         return [os.path.expanduser('~/.hgrc')]
+
+def termwidth():
+    try:
+        import array
+        import termios
+        for dev in (sys.stderr, sys.stdout, sys.stdin):
+            try:
+                try:
+                    fd = dev.fileno()
+                except AttributeError:
+                    continue
+                if not os.isatty(fd):
+                    continue
+                try:
+                    arri = fcntl.ioctl(fd, termios.TIOCGWINSZ, '\0' * 8)
+                    width = array.array('h', arri)[1]
+                    if width > 0:
+                        return width
+                except AttributeError:
+                    pass
+            except ValueError:
+                pass
+            except IOError as e:
+                if e[0] == errno.EINVAL:
+                    pass
+                else:
+                    raise
+    except ImportError:
+        pass
+    return 80
diff --git a/mercurial/scmutil.py b/mercurial/scmutil.py
--- a/mercurial/scmutil.py
+++ b/mercurial/scmutil.py
@@ -39,6 +39,7 @@ else:
 
 systemrcpath = scmplatform.systemrcpath
 userrcpath = scmplatform.userrcpath
+termwidth = scmplatform.termwidth
 
 class status(tuple):
     '''Named tuple with a list of files per status. The 'deleted', 'unknown'
diff --git a/mercurial/scmwindows.py b/mercurial/scmwindows.py
--- a/mercurial/scmwindows.py
+++ b/mercurial/scmwindows.py
@@ -5,6 +5,7 @@ import os
 from . import (
     osutil,
     util,
+    win32,
 )
 
 try:
@@ -51,3 +52,6 @@ def userrcpath():
         path.append(os.path.join(userprofile, 'mercurial.ini'))
         path.append(os.path.join(userprofile, '.hgrc'))
     return path
+
+def termwidth():
+    return win32.termwidth()
diff --git a/mercurial/ui.py b/mercurial/ui.py
--- a/mercurial/ui.py
+++ b/mercurial/ui.py
@@ -822,7 +822,7 @@ class ui(object):
                 return int(encoding.environ['COLUMNS'])
             except ValueError:
                 pass
-        return util.termwidth()
+        return scmutil.termwidth()
 
     def formatted(self):
         '''should formatted output be used?
diff --git a/mercurial/util.py b/mercurial/util.py
--- a/mercurial/util.py
+++ b/mercurial/util.py
@@ -122,7 +122,6 @@ sshargs = platform.sshargs
 statfiles = getattr(osutil, 'statfiles', platform.statfiles)
 statisexec = platform.statisexec
 statislink = platform.statislink
-termwidth = platform.termwidth
 testpid = platform.testpid
 umask = platform.umask
 unlink = platform.unlink
diff --git a/mercurial/windows.py b/mercurial/windows.py
--- a/mercurial/windows.py
+++ b/mercurial/windows.py
@@ -38,7 +38,6 @@ samefile = win32.samefile
 setsignalhandler = win32.setsignalhandler
 spawndetached = win32.spawndetached
 split = os.path.split
-termwidth = win32.termwidth
 testpid = win32.testpid
 unlink = win32.unlink