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"""SCons.Errors
This file contains the exception classes used to handle internal
and user errors in SCons.
"""
__revision__ = "__FILE__ __REVISION__ __DATE__ __DEVELOPER__"
import shutil
import SCons.Util
[docs]class BuildError(Exception):
"""SCons Errors that can occur while building.
Attributes:
Information about the cause of the build error :
errstr: a description of the error message
status: the return code of the action that caused the build error.
Must be set to a non-zero value even if the build error is not due
to an action returning a non-zero returned code.
exitstatus: SCons exit status due to this build error.
Must be nonzero unless due to an explicit Exit()
call. Not always the same as status, since
actions return a status code that should be
respected, but SCons typically exits with 2
irrespective of the return value of the failed
action.
filename: The name of the file or directory that caused the
build error. Set to None if no files are associated with
this error. This might be different from the target
being built. For example, failure to create the
directory in which the target file will appear. It
can be None if the error is not due to a particular
filename.
exc_info: Info about exception that caused the build
error. Set to (None, None, None) if this build
error is not due to an exception.
Information about the what caused the build error :
node: the error occurred while building this target node(s)
executor: the executor that caused the build to fail (might
be None if the build failures is not due to the
executor failing)
action: the action that caused the build to fail (might be
None if the build failures is not due to the an
action failure)
command: the command line for the action that caused the
build to fail (might be None if the build failures
is not due to the an action failure)
"""
def __init__(self,
node=None, errstr="Unknown error", status=2, exitstatus=2,
filename=None, executor=None, action=None, command=None,
exc_info=(None, None, None)):
# py3: errstr should be string and not bytes.
self.errstr = SCons.Util.to_String(errstr)
self.status = status
self.exitstatus = exitstatus
self.filename = filename
self.exc_info = exc_info
self.node = node
self.executor = executor
self.action = action
self.command = command
Exception.__init__(self, node, errstr, status, exitstatus, filename,
executor, action, command, exc_info)
def __str__(self):
if self.filename:
return self.filename + ': ' + self.errstr
else:
return self.errstr
[docs]class InternalError(Exception):
pass
[docs]class UserError(Exception):
pass
[docs]class StopError(Exception):
pass
[docs]class SConsEnvironmentError(Exception):
pass
[docs]class MSVCError(IOError):
pass
[docs]class ExplicitExit(Exception):
def __init__(self, node=None, status=None, *args):
self.node = node
self.status = status
self.exitstatus = status
Exception.__init__(self, *args)
[docs]def convert_to_BuildError(status, exc_info=None):
"""Convert a return code to a BuildError Exception.
The `buildError.status` we set here will normally be
used as the exit status of the "scons" process.
Args:
status: can either be a return code or an Exception.
exc_info (tuple, optional): explicit exception information.
"""
if not exc_info and isinstance(status, Exception):
exc_info = (status.__class__, status, None)
if isinstance(status, BuildError):
buildError = status
buildError.exitstatus = 2 # always exit with 2 on build errors
elif isinstance(status, ExplicitExit):
status = status.status
errstr = 'Explicit exit, status %s' % status
buildError = BuildError(
errstr=errstr,
status=status, # might be 0, OK here
exitstatus=status, # might be 0, OK here
exc_info=exc_info)
elif isinstance(status, (StopError, UserError)):
buildError = BuildError(
errstr=str(status),
status=2,
exitstatus=2,
exc_info=exc_info)
elif isinstance(status, shutil.SameFileError):
# PY3 has a exception for when copying file to itself
# It's object provides info differently than below
try:
filename = status.filename
except AttributeError:
filename = None
buildError = BuildError(
errstr=status.args[0],
status=status.errno,
exitstatus=2,
filename=filename,
exc_info=exc_info)
elif isinstance(status, (SConsEnvironmentError, OSError, IOError)):
# If an IOError/OSError happens, raise a BuildError.
# Report the name of the file or directory that caused the
# error, which might be different from the target being built
# (for example, failure to create the directory in which the
# target file will appear).
filename = getattr(status, 'filename', None)
strerror = getattr(status, 'strerror', str(status))
errno = getattr(status, 'errno', 2)
buildError = BuildError(
errstr=strerror,
status=errno,
exitstatus=2,
filename=filename,
exc_info=exc_info)
elif isinstance(status, Exception):
buildError = BuildError(
errstr='%s : %s' % (status.__class__.__name__, status),
status=2,
exitstatus=2,
exc_info=exc_info)
elif SCons.Util.is_String(status):
buildError = BuildError(
errstr=status,
status=2,
exitstatus=2)
else:
buildError = BuildError(
errstr="Error %s" % status,
status=status,
exitstatus=2)
#import sys
#sys.stderr.write("convert_to_BuildError: status %s => (errstr %s, status %s)\n"%(status,buildError.errstr, buildError.status))
return buildError
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