From 647021be64614f25980179ef3d3374be26c6126c Mon Sep 17 00:00:00 2001
From: Takeshi KOMIYA <i.tkomiya@gmail.com>
Date: Sat, 12 Jan 2019 21:56:19 +0900
Subject: [PATCH] Add progress_message() as a helper for progress messages

---
 sphinx/application.py   | 15 +++++++--------
 sphinx/util/__init__.py | 29 +++++++++++++++++++++++++++++
 2 files changed, 36 insertions(+), 8 deletions(-)

diff --git a/sphinx/application.py b/sphinx/application.py
index 822c02a36..5744e4e94 100644
--- a/sphinx/application.py
+++ b/sphinx/application.py
@@ -35,7 +35,7 @@ from sphinx.locale import __
 from sphinx.project import Project
 from sphinx.registry import SphinxComponentRegistry
 from sphinx.util import docutils
-from sphinx.util import import_object
+from sphinx.util import import_object, progress_message
 from sphinx.util import logging
 from sphinx.util import pycompat  # noqa: F401
 from sphinx.util.build_phase import BuildPhase
@@ -230,8 +230,8 @@ class Sphinx:
         self.preload_builder(buildername)
 
         if not path.isdir(outdir):
-            logger.info(__('making output directory...'))
-            ensuredir(outdir)
+            with progress_message(__('making output directory')):
+                ensuredir(outdir)
 
         # the config file itself can be an extension
         if self.config.setup:
@@ -294,11 +294,10 @@ class Sphinx:
             self.env.find_files(self.config, self.builder)
         else:
             try:
-                logger.info(bold(__('loading pickled environment... ')), nonl=True)
-                with open(filename, 'rb') as f:
-                    self.env = pickle.load(f)
-                    self.env.setup(self)
-                logger.info(__('done'))
+                with progress_message(__('loading pickled environment')):
+                    with open(filename, 'rb') as f:
+                        self.env = pickle.load(f)
+                        self.env.setup(self)
             except Exception as err:
                 logger.info(__('failed: %s'), err)
                 self._init_env(freshenv=True)
diff --git a/sphinx/util/__init__.py b/sphinx/util/__init__.py
index 0da075768..18e9f8701 100644
--- a/sphinx/util/__init__.py
+++ b/sphinx/util/__init__.py
@@ -9,6 +9,7 @@
 """
 
 import fnmatch
+import functools
 import os
 import posixpath
 import re
@@ -675,6 +676,34 @@ def status_iterator(iterable, summary, color="darkgreen", length=0, verbosity=0,
         logger.info('')
 
 
+class progress_message:
+    def __init__(self, message):
+        # type: (str) -> None
+        self.message = message
+
+    def __enter__(self):
+        # type: () -> None
+        logger.info(bold(self.message + '... '), nonl=True)
+
+    def __exit__(self, exc_type, exc_value, traceback):
+        # type: (Any, Any, Any) -> bool
+        if exc_type:
+            logger.info(__('failed'))
+        else:
+            logger.info(__('done'))
+
+        return False
+
+    def __call__(self, f):
+        # type: (Callable) -> Callable
+        @functools.wraps(f)
+        def wrapper(*args, **kwargs):
+            with self:
+                return f(*args, **kwargs)
+
+        return wrapper
+
+
 def epoch_to_rfc1123(epoch):
     # type: (float) -> str
     """Convert datetime format epoch to RFC1123."""