Added an unmodified copy of SCons to third_party.

scons-2.0.1/engine/SCons/Warnings.py

+#
+# Copyright (c) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010 The SCons Foundation
+#
+# Permission is hereby granted, free of charge, to any person obtaining
+# a copy of this software and associated documentation files (the
+# "Software"), to deal in the Software without restriction, including
+# without limitation the rights to use, copy, modify, merge, publish,
+# distribute, sublicense, and/or sell copies of the Software, and to
+# permit persons to whom the Software is furnished to do so, subject to
+# the following conditions:
+#
+# The above copyright notice and this permission notice shall be included
+# in all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY
+# KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
+# WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+#
+
+"""SCons.Warnings
+
+This file implements the warnings framework for SCons.
+
+"""
+
+__revision__ = "src/engine/SCons/Warnings.py 5134 2010/08/16 23:02:40 bdeegan"
+
+import sys
+
+import SCons.Errors
+
+class Warning(SCons.Errors.UserError):
+    pass
+
+class WarningOnByDefault(Warning):
+    pass
+
+
+# NOTE:  If you add a new warning class, add it to the man page, too!
+
+class CacheWriteErrorWarning(Warning):
+    pass
+
+class CorruptSConsignWarning(WarningOnByDefault):
+    pass
+
+class DependencyWarning(Warning):
+    pass
+
+class DuplicateEnvironmentWarning(WarningOnByDefault):
+    pass
+
+class FutureReservedVariableWarning(WarningOnByDefault):
+    pass
+
+class LinkWarning(WarningOnByDefault):
+    pass
+
+class MisleadingKeywordsWarning(WarningOnByDefault):
+    pass
+
+class MissingSConscriptWarning(WarningOnByDefault):
+    pass
+
+class NoMD5ModuleWarning(WarningOnByDefault):
+    pass
+
+class NoMetaclassSupportWarning(WarningOnByDefault):
+    pass
+
+class NoObjectCountWarning(WarningOnByDefault):
+    pass
+
+class NoParallelSupportWarning(WarningOnByDefault):
+    pass
+
+class ReservedVariableWarning(WarningOnByDefault):
+    pass
+
+class StackSizeWarning(WarningOnByDefault):
+    pass
+
+class VisualCMissingWarning(WarningOnByDefault):
+    pass
+
+# Used when MSVC_VERSION and MSVS_VERSION do not point to the
+# same version (MSVS_VERSION is deprecated)
+class VisualVersionMismatch(WarningOnByDefault):
+    pass
+
+class VisualStudioMissingWarning(Warning):
+    pass
+
+class FortranCxxMixWarning(LinkWarning):
+    pass
+
+
+# Deprecation warnings
+
+class FutureDeprecatedWarning(Warning):
+    pass
+
+class DeprecatedWarning(Warning):
+    pass
+
+class MandatoryDeprecatedWarning(DeprecatedWarning):
+    pass
+
+
+# Special case; base always stays DeprecatedWarning
+class PythonVersionWarning(DeprecatedWarning):
+    pass
+
+class DeprecatedSourceCodeWarning(FutureDeprecatedWarning):
+    pass
+
+class DeprecatedBuildDirWarning(DeprecatedWarning):
+    pass
+
+class TaskmasterNeedsExecuteWarning(DeprecatedWarning):
+    pass
+
+class DeprecatedCopyWarning(MandatoryDeprecatedWarning):
+    pass
+
+class DeprecatedOptionsWarning(MandatoryDeprecatedWarning):
+    pass
+
+class DeprecatedSourceSignaturesWarning(MandatoryDeprecatedWarning):
+    pass
+
+class DeprecatedTargetSignaturesWarning(MandatoryDeprecatedWarning):
+    pass
+
+class DeprecatedDebugOptionsWarning(MandatoryDeprecatedWarning):
+    pass
+
+class DeprecatedSigModuleWarning(MandatoryDeprecatedWarning):
+    pass
+
+class DeprecatedBuilderKeywordsWarning(MandatoryDeprecatedWarning):
+    pass
+
+
+# The below is a list of 2-tuples.  The first element is a class object.
+# The second element is true if that class is enabled, false if it is disabled.
+_enabled = []
+
+# If set, raise the warning as an exception
+_warningAsException = 0
+
+# If not None, a function to call with the warning
+_warningOut = None
+
+def suppressWarningClass(clazz):
+    """Suppresses all warnings that are of type clazz or
+    derived from clazz."""
+    _enabled.insert(0, (clazz, 0))
+
+def enableWarningClass(clazz):
+    """Enables all warnings that are of type clazz or
+    derived from clazz."""
+    _enabled.insert(0, (clazz, 1))
+
+def warningAsException(flag=1):
+    """Turn warnings into exceptions.  Returns the old value of the flag."""
+    global _warningAsException
+    old = _warningAsException
+    _warningAsException = flag
+    return old
+
+def warn(clazz, *args):
+    global _enabled, _warningAsException, _warningOut
+
+    warning = clazz(args)
+    for clazz, flag in _enabled:
+        if isinstance(warning, clazz):
+            if flag:
+                if _warningAsException:
+                    raise warning
+
+                if _warningOut:
+                    _warningOut(warning)
+            break
+
+def process_warn_strings(arguments):
+    """Process string specifications of enabling/disabling warnings,
+    as passed to the --warn option or the SetOption('warn') function.
+    
+
+    An argument to this option should be of the form <warning-class>
+    or no-<warning-class>.  The warning class is munged in order
+    to get an actual class name from the classes above, which we
+    need to pass to the {enable,disable}WarningClass() functions.
+    The supplied <warning-class> is split on hyphens, each element
+    is capitalized, then smushed back together.  Then the string
+    "Warning" is appended to get the class name.
+
+    For example, 'deprecated' will enable the DeprecatedWarning
+    class.  'no-dependency' will disable the DependencyWarning class.
+
+    As a special case, --warn=all and --warn=no-all will enable or
+    disable (respectively) the base Warning class of all warnings.
+
+    """
+
+    def _capitalize(s):
+        if s[:5] == "scons":
+            return "SCons" + s[5:]
+        else:
+            return s.capitalize()
+
+    for arg in arguments:
+
+        elems = arg.lower().split('-')
+        enable = 1
+        if elems[0] == 'no':
+            enable = 0
+            del elems[0]
+
+        if len(elems) == 1 and elems[0] == 'all':
+            class_name = "Warning"
+        else:
+            class_name = ''.join(map(_capitalize, elems)) + "Warning"
+        try:
+            clazz = globals()[class_name]
+        except KeyError:
+            sys.stderr.write("No warning type: '%s'\n" % arg)
+        else:
+            if enable:
+                enableWarningClass(clazz)
+            elif issubclass(clazz, MandatoryDeprecatedWarning):
+                fmt = "Can not disable mandataory warning: '%s'\n"
+                sys.stderr.write(fmt % arg)
+            else:
+                suppressWarningClass(clazz)
+
+# Local Variables:
+# tab-width:4
+# indent-tabs-mode:nil
+# End:
+# vim: set expandtab tabstop=4 shiftwidth=4: