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      1 #===----------------------------------------------------------------------===##
      2 #
      3 #                     The LLVM Compiler Infrastructure
      4 #
      5 # This file is dual licensed under the MIT and the University of Illinois Open
      6 # Source Licenses. See LICENSE.TXT for details.
      7 #
      8 #===----------------------------------------------------------------------===##
      9 
     10 from contextlib import contextmanager
     11 import os
     12 import tempfile
     13 
     14 
     15 def cleanFile(filename):
     16     try:
     17         os.remove(filename)
     18     except OSError:
     19         pass
     20 
     21 
     22 @contextmanager
     23 def guardedTempFilename(suffix='', prefix='', dir=None):
     24     # Creates and yeilds a temporary filename within a with statement. The file
     25     # is removed upon scope exit.
     26     handle, name = tempfile.mkstemp(suffix=suffix, prefix=prefix, dir=dir)
     27     os.close(handle)
     28     yield name
     29     cleanFile(name)
     30 
     31 
     32 @contextmanager
     33 def guardedFilename(name):
     34     # yeilds a filename within a with statement. The file is removed upon scope
     35     # exit.
     36     yield name
     37     cleanFile(name)
     38 
     39 
     40 @contextmanager
     41 def nullContext(value):
     42     # yeilds a variable within a with statement. No action is taken upon scope
     43     # exit.
     44     yield value
     45 
     46 
     47 def makeReport(cmd, out, err, rc):
     48     report = "Command: %s\n" % cmd
     49     report += "Exit Code: %d\n" % rc
     50     if out:
     51         report += "Standard Output:\n--\n%s--\n" % out
     52     if err:
     53         report += "Standard Error:\n--\n%s--\n" % err
     54     report += '\n'
     55     return report
     56