dispatch: move initialization of sys.std* files

I'll add another Python 3 hack.

contrib/hgperf

@@ -94,7 +94,4 b' def runcommand(lui, repo, cmd, fullargs,'
 
 dispatch.runcommand = runcommand
 
-for fp in (sys.stdin, sys.stdout, sys.stderr):
-    util.setbinary(fp)
-
 dispatch.run()

hg

@@ -37,11 +37,5 b' except ImportError:'
     sys.stderr.write("(check your install and PYTHONPATH)\n")
     sys.exit(-1)
 
-from mercurial import (
-    dispatch,
-    util,
-)
-for fp in (sys.stdin, sys.stdout, sys.stderr):
-    util.setbinary(fp)
-
+from mercurial import dispatch
 dispatch.run()

mercurial/dispatch.py

@@ -75,6 +75,7 b' class request(object):'
 
 def run():
     "run the command in sys.argv"
+    _initstdio()
     req = request(pycompat.sysargv[1:])
     err = None
     try:
@@ -95,6 +96,10 b' def run():'
         req.ui.ferr.flush()
     sys.exit(status & 255)
 
+def _initstdio():
+    for fp in (sys.stdin, sys.stdout, sys.stderr):
+        util.setbinary(fp)
+
 def _getsimilar(symbols, value):
     sim = lambda x: difflib.SequenceMatcher(None, value, x).ratio()
     # The cutoff for similarity here is pretty arbitrary. It should