git cl upload: convert to print_function

This makes the code work both in python2 and python3.

Review-Url: https://codereview.chromium.org/2078553002

third_party/upload.py

@@ -34,6 +34,8 @@ against by using the '--rev' option.
 # This code is derived from appcfg.py in the App Engine SDK (open source),
 # and from ASPN recipe #146306.
 
+from __future__ import print_function
+
 import ConfigParser
 import cookielib
 import errno
@@ -168,12 +170,12 @@ def StatusUpdate(msg):
     msg: The string to print.
   """
   if verbosity > 0:
-    print msg
+    print(msg)
 
 
 def ErrorExit(msg):
   """Print an error message to stderr and exit."""
-  print >> sys.stderr, msg
+  print(msg, file=sys.stderr)
   sys.exit(1)
 
 
@@ -358,7 +360,7 @@ class AbstractRpcServer(object):
         except ClientLoginError, exc:
           e = exc
       if e:
-        print >> sys.stderr, ''
+        print('', file=sys.stderr)
         error_message = e.reason
         if error_map:
           error_message = error_map.get(error_message, error_message)
@@ -370,7 +372,7 @@ class AbstractRpcServer(object):
                 "See http://www.google.com/"
                 "support/accounts/bin/answer.py?answer=185833")
           else:
-            print >> sys.stderr, "Invalid username or password."
+            print("Invalid username or password.", file=sys.stderr)
         elif error_message == "CaptchaRequired":
           print >> sys.stderr, (
               "Please go to\n"
@@ -379,23 +381,24 @@ class AbstractRpcServer(object):
               "If you are using a Google Apps account the URL is:\n"
               "https://www.google.com/a/yourdomain.com/UnlockCaptcha")
         elif error_message == "NotVerified":
-          print >> sys.stderr, "Account not verified."
+          print("Account not verified.", file=sys.stderr)
         elif error_message == "TermsNotAgreed":
-          print >> sys.stderr, "User has not agreed to TOS."
+          print("User has not agreed to TOS.", file=sys.stderr)
         elif error_message == "AccountDeleted":
-          print >> sys.stderr, "The user account has been deleted."
+          print("The user account has been deleted.", file=sys.stderr)
         elif error_message == "AccountDisabled":
-          print >> sys.stderr, "The user account has been disabled."
+          print("The user account has been disabled.", file=sys.stderr)
           break
         elif error_message == "ServiceDisabled":
-          print >> sys.stderr, ("The user's access to the service has been "
-                               "disabled.")
+          print("The user's access to the service has been disabled.",
+                file=sys.stderr)
         elif error_message == "ServiceUnavailable":
-          print >> sys.stderr, "The service is not available; try again later."
+          print("The service is not available; try again later.",
+                file=sys.stderr)
         else:
           # Unknown error.
           raise e
-        print >> sys.stderr, ''
+        print('', file=sys.stderr)
         continue
       self._GetAuthCookie(auth_token)
       return
@@ -720,10 +723,10 @@ class KeyringCreds(object):
       except:
         # Sadly, we have to trap all errors here as
         # gnomekeyring.IOError inherits from object. :/
-        print "Failed to get password from keyring"
+        print("Failed to get password from keyring")
         keyring = None
     if password is not None:
-      print "Using password from system keyring."
+      print("Using password from system keyring.")
       self.accounts_seen.add(email)
     else:
       password = getpass.getpass("Password for %s: " % email)
@@ -920,9 +923,9 @@ class VersionControlSystem(object):
     """Show an "are you sure?" prompt if there are unknown files."""
     unknown_files = self.GetUnknownFiles()
     if unknown_files:
-      print "The following files are not added to version control:"
+      print("The following files are not added to version control:")
       for line in unknown_files:
-        print line
+        print(line)
       prompt = "Are you sure to continue?(y/N) "
       answer = raw_input(prompt).strip()
       if answer != "y":
@@ -1029,7 +1032,7 @@ class VersionControlSystem(object):
         threads.append(t)
 
     for t in threads:
-      print t.get(timeout=60)
+      print(t.get(timeout=60))
 
   def IsImage(self, filename):
     """Returns true if the filename has an image extension."""
@@ -1703,7 +1706,7 @@ class PerforceVCS(VersionControlSystem):
           ErrorExit("Error checking perforce login")
         if not retcode and (not "code" in data or data["code"] != "error"):
           break
-        print "Enter perforce password: "
+        print("Enter perforce password: ")
         self.RunPerforceCommandWithReturnCode(["login"])
 
     super(PerforceVCS, self).__init__(options)
@@ -2083,8 +2086,8 @@ def UploadSeparatePatches(issue, rpc_server, patchset, data, options):
   rv = []
   for patch in patches:
     if len(patch[1]) > MAX_UPLOAD_SIZE:
-      print ("Not uploading the patch for " + patch[0] +
-             " because the file is too large.")
+      print("Not uploading the patch for %s because the file is too large." %
+            (patch[0],))
       continue
 
     filename = patch[0]
@@ -2095,7 +2098,7 @@ def UploadSeparatePatches(issue, rpc_server, patchset, data, options):
 
   for t in threads:
     result = t.get(timeout=60)
-    print result[0]
+    print(result[0])
     rv.append(result[1])
 
   return rv
@@ -2372,8 +2375,8 @@ def RealMain(argv, data=None):
     guessed_base = vcs.GuessBase(options.download_base)
     if base:
       if guessed_base and base != guessed_base:
-        print "Using base URL \"%s\" from --base_url instead of \"%s\"" % \
-            (base, guessed_base)
+        print("Using base URL \"%s\" from --base_url instead of \"%s\"" %
+              (base, guessed_base))
     else:
       base = guessed_base
 
@@ -2386,12 +2389,12 @@ def RealMain(argv, data=None):
     data = vcs.GenerateDiff(args)
   data = vcs.PostProcessDiff(data)
   if options.print_diffs:
-    print "Rietveld diff start:*****"
-    print data
-    print "Rietveld diff end:*****"
+    print("Rietveld diff start:*****")
+    print(data)
+    print("Rietveld diff end:*****")
   files = vcs.GetBaseFiles(data)
   if verbosity >= 1:
-    print "Upload server:", options.server, "(change with -s/--server)"
+    print("Upload server:", options.server, "(change with -s/--server)")
 
   auth_config = auth.extract_auth_config_from_options(options)
   rpc_server = GetRpcServer(options.server, auth_config, options.email)
@@ -2477,7 +2480,7 @@ def RealMain(argv, data=None):
   form_fields.append(("base_hashes", base_hashes))
   if options.private:
     if options.issue:
-      print "Warning: Private flag ignored when updating an existing issue."
+      print("Warning: Private flag ignored when updating an existing issue.")
     else:
       form_fields.append(("private", "1"))
   if options.send_patch:
@@ -2485,7 +2488,7 @@ def RealMain(argv, data=None):
   if not options.download_base:
     form_fields.append(("content_upload", "1"))
   if len(data) > MAX_UPLOAD_SIZE:
-    print "Patch is large, so uploading file patches separately."
+    print("Patch is large, so uploading file patches separately.")
     uploaded_diff_file = []
     form_fields.append(("separate_patches", "1"))
   else:
@@ -2544,7 +2547,7 @@ def main():
     StatusUpdate("Interrupted.")
     sys.exit(1)
   except auth.AuthenticationError as e:
-    print >> sys.stderr, e
+    print(e, file=sys.stderr)
     sys.exit(1)