[lit] Eliminate some nested imports.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@188007 91177308-0d34-0410-b5e6-96231b3b80d8

utils/lit/lit/LitConfig.py

@@ -1,5 +1,7 @@
 from __future__ import absolute_import
+import inspect
 import os
+import sys
 
 import lit.Test
 import lit.TestFormats
@@ -75,8 +77,6 @@ def load_config(self, config, path):
 
     def getBashPath(self):
         """getBashPath - Get the path to 'bash'"""
-        import os
-
         if self.bashPath is not None:
             return self.bashPath
 
@@ -110,8 +110,6 @@ def getToolsPath(self, dir, paths, tools):
         return dir
 
     def _write_message(self, kind, message):
-        import inspect, os, sys
-
         # Get the file/line where this message was generated.
         f = inspect.currentframe()
         # Step out of _write_message, and then out of wrapper.
@@ -134,6 +132,5 @@ def error(self, message):
         self.numErrors += 1
 
     def fatal(self, message):
-        import sys
         self._write_message('fatal', message)
         sys.exit(2)

utils/lit/lit/ProgressBar.py

@@ -273,7 +273,6 @@ def clear(self):
             self.cleared = 1
 
 def test():
-    import time
     tc = TerminalController()
     p = ProgressBar(tc, 'Tests')
     for i in range(101):

utils/lit/lit/Util.py

@@ -1,4 +1,9 @@
-import os, sys
+import errno
+import itertools
+import math
+import os
+import subprocess
+import sys
 
 def detectCPUs():
     """
@@ -23,8 +28,6 @@ def detectCPUs():
 def mkdir_p(path):
     """mkdir_p(path) - Make the "path" directory, if it does not exist; this
     will also make directories for any missing parent directories."""
-    import errno
-
     if not path or os.path.exists(path):
         return
 
@@ -41,7 +44,6 @@ def mkdir_p(path):
             raise
 
 def capture(args, env=None):
-    import subprocess
     """capture(command) - Run the given command (or argv list) in a shell and
     return the standard output."""
     p = subprocess.Popen(args, stdout=subprocess.PIPE, stderr=subprocess.PIPE,
@@ -93,8 +95,6 @@ def whichTools(tools, paths):
     return None
 
 def printHistogram(items, title = 'Items'):
-    import itertools, math
-
     items.sort(key = lambda item: item[1])
 
     maxValue = max([v for _,v in items])

utils/lit/lit/main.py

@@ -161,7 +161,6 @@ def main(builtinParameters = {}):
     # blocking operation (hopefully exec) than to try and unblock other threads.
     #
     # FIXME: This is a hack.
-    import sys
     sys.setcheckinterval(1000)
 
     global options