# MIT License
#
# Copyright The SCons Foundation
#
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# a copy of this software and associated documentation files (the
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# without limitation the rights to use, copy, modify, merge, publish,
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# 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.
#
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# 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
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# 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 exception classes.
Used to handle internal and user errors in SCons.
"""
import shutil
import SCons.Util
# Note that not all Errors are defined here, some are at the point of use
[docs]class BuildError(Exception):
"""SCons Errors that can occur while building.
A :class:`BuildError` exception contains information both
about the erorr itself, and what caused the error.
Attributes:
node: (*cause*) the error occurred while building this target node(s)
errstr: (*info*) a description of the error message
status: (*info*) 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: (*info*) SCons exit status due to this build error.
Must be nonzero unless due to an explicit :meth:`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: (*info*) 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.
executor: (*cause*) the executor that caused the build to fail (might
be ``None`` if the build failures is not due to the executor failing)
action: (*cause*) the action that caused the build to fail (might be
``None`` if the build failures is not due to the an
action failure)
command: (*cause*) 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)
exc_info: (*info*) Info about exception that caused the build
error. Set to ``(None, None, None)`` if this build
error is not due to an exception.
"""
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
super().__init__(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
super().__init__(*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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