tools/checkdeps/results.py

   1 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 # Use of this source code is governed by a BSD-style license that can be
   3 # found in the LICENSE file.
   4
   5
   6 """Results object and results formatters for checkdeps tool."""
   7
   8
   9 class DependencyViolation(object):
  10   """A single dependency violation."""
  11
  12   def __init__(self, include_path, violated_rule, rules):
  13     # The include or import path that is in violation of a rule.
  14     self.include_path = include_path
  15
  16     # The violated rule.
  17     self.violated_rule = violated_rule
  18
  19     # The set of rules containing self.violated_rule.
  20     self.rules = rules
  21
  22
  23 class DependeeStatus(object):
  24   """Results object for a dependee file."""
  25
  26   def __init__(self, dependee_path):
  27     # Path of the file whose nonconforming dependencies are listed in
  28     # self.violations.
  29     self.dependee_path = dependee_path
  30
  31     # List of DependencyViolation objects that apply to the dependee
  32     # file.  May be empty.
  33     self.violations = []
  34
  35   def AddViolation(self, violation):
  36     """Adds a violation."""
  37     self.violations.append(violation)
  38
  39   def HasViolations(self):
  40     """Returns True if this dependee is violating one or more rules."""
  41     return not not self.violations
  42
  43
  44 class ResultsFormatter(object):
  45   """Base class for results formatters."""
  46
  47   def AddError(self, dependee_status):
  48     """Add a formatted result to |self.results| for |dependee_status|,
  49     which is guaranteed to return True for
  50     |dependee_status.HasViolations|.
  51     """
  52     raise NotImplementedError()
  53
  54   def GetResults(self):
  55     """Returns the results.  May be overridden e.g. to process the
  56     results that have been accumulated.
  57     """
  58     raise NotImplementedError()
  59
  60   def PrintResults(self):
  61     """Prints the results to stdout."""
  62     raise NotImplementedError()
  63
  64
  65 class NormalResultsFormatter(ResultsFormatter):
  66   """A results formatting object that produces the classical,
  67   detailed, human-readable output of the checkdeps tool.
  68   """
  69
  70   def __init__(self, verbose):
  71     self.results = []
  72     self.verbose = verbose
  73
  74   def AddError(self, dependee_status):
  75     lines = []
  76     lines.append('\nERROR in %s' % dependee_status.dependee_path)
  77     for violation in dependee_status.violations:
  78       lines.append(self.FormatViolation(violation, self.verbose))
  79     self.results.append('\n'.join(lines))
  80
  81   @staticmethod
  82   def FormatViolation(violation, verbose=False):
  83     lines = []
  84     if verbose:
  85       lines.append('  For %s' % violation.rules)
  86     lines.append(
  87         '  Illegal include: "%s"\n    Because of %s' %
  88         (violation.include_path, str(violation.violated_rule)))
  89     return '\n'.join(lines)
  90
  91   def GetResults(self):
  92     return self.results
  93
  94   def PrintResults(self):
  95     for result in self.results:
  96       print result
  97     if self.results:
  98       print '\nFAILED\n'
  99
 100
 101 class TemporaryRulesFormatter(ResultsFormatter):
 102   """A results formatter that produces a single line per nonconforming
 103   include. The combined output is suitable for directly pasting into a
 104   DEPS file as a list of temporary-allow rules.
 105   """
 106
 107   def __init__(self):
 108     self.violations = set()
 109
 110   def AddError(self, dependee_status):
 111     for violation in dependee_status.violations:
 112       self.violations.add(violation.include_path)
 113
 114   def GetResults(self):
 115     return ['  "!%s",' % path for path in sorted(self.violations)]
 116
 117   def PrintResults(self):
 118     for result in self.GetResults():
 119       print result