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authorKenneth Heafield <github@kheafield.com>2012-05-12 14:01:52 -0400
committerKenneth Heafield <github@kheafield.com>2012-05-12 14:01:52 -0400
commit3faecf9a00512dcbc8712c4bca9adae72fb64410 (patch)
tree9761b50d12f81a675fb7cbc663ceebad15079f78 /jam-files/boost-build/build/errors.py
parentc806a8fff63043f63773874986301f2822a2b552 (diff)
Give in and copy bjam into cdec source code
Diffstat (limited to 'jam-files/boost-build/build/errors.py')
-rw-r--r--jam-files/boost-build/build/errors.py127
1 files changed, 127 insertions, 0 deletions
diff --git a/jam-files/boost-build/build/errors.py b/jam-files/boost-build/build/errors.py
new file mode 100644
index 00000000..d9dceefe
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+++ b/jam-files/boost-build/build/errors.py
@@ -0,0 +1,127 @@
+# Status: being written afresh by Vladimir Prus
+
+# Copyright 2007 Vladimir Prus
+# Distributed under the Boost Software License, Version 1.0.
+# (See accompanying file LICENSE_1_0.txt or http://www.boost.org/LICENSE_1_0.txt)
+
+# This file is supposed to implement error reporting for Boost.Build.
+# Experience with jam version has shown that printing full backtrace
+# on each error is buffling. Further, for errors printed after parsing --
+# during target building, the stacktrace does not even mention what
+# target is being built.
+
+# This module implements explicit contexts -- where other code can
+# communicate which projects/targets are being built, and error
+# messages will show those contexts. For programming errors,
+# Python assertions are to be used.
+
+import bjam
+import traceback
+import sys
+
+def format(message, prefix=""):
+ parts = str(message).split("\n")
+ return "\n".join(prefix+p for p in parts)
+
+
+class Context:
+
+ def __init__(self, message, nested=None):
+ self.message_ = message
+ self.nested_ = nested
+
+ def report(self, indent=""):
+ print indent + " -", self.message_
+ if self.nested_:
+ print indent + " declared at:"
+ for n in self.nested_:
+ n.report(indent + " ")
+
+class JamfileContext:
+
+ def __init__(self):
+ raw = bjam.backtrace()
+ self.raw_ = raw
+
+ def report(self, indent=""):
+ for r in self.raw_:
+ print indent + " - %s:%s" % (r[0], r[1])
+
+class ExceptionWithUserContext(Exception):
+
+ def __init__(self, message, context,
+ original_exception=None, original_tb=None, stack=None):
+ Exception.__init__(self, message)
+ self.context_ = context
+ self.original_exception_ = original_exception
+ self.original_tb_ = original_tb
+ self.stack_ = stack
+
+ def report(self):
+ print "error:", self.args[0]
+ if self.original_exception_:
+ print format(str(self.original_exception_), " ")
+ print
+ print " error context (most recent first):"
+ for c in self.context_[::-1]:
+ c.report()
+ print
+ if "--stacktrace" in bjam.variable("ARGV"):
+ if self.original_tb_:
+ traceback.print_tb(self.original_tb_)
+ elif self.stack_:
+ for l in traceback.format_list(self.stack_):
+ print l,
+ else:
+ print " use the '--stacktrace' option to get Python stacktrace"
+ print
+
+def user_error_checkpoint(callable):
+ def wrapper(self, *args):
+ errors = self.manager().errors()
+ try:
+ return callable(self, *args)
+ except ExceptionWithUserContext, e:
+ raise
+ except Exception, e:
+ errors.handle_stray_exception(e)
+ finally:
+ errors.pop_user_context()
+
+ return wrapper
+
+class Errors:
+
+ def __init__(self):
+ self.contexts_ = []
+ self._count = 0
+
+ def count(self):
+ return self._count
+
+ def push_user_context(self, message, nested=None):
+ self.contexts_.append(Context(message, nested))
+
+ def pop_user_context(self):
+ del self.contexts_[-1]
+
+ def push_jamfile_context(self):
+ self.contexts_.append(JamfileContext())
+
+ def pop_jamfile_context(self):
+ del self.contexts_[-1]
+
+ def capture_user_context(self):
+ return self.contexts_[:]
+
+ def handle_stray_exception(self, e):
+ raise ExceptionWithUserContext("unexpected exception", self.contexts_[:],
+ e, sys.exc_info()[2])
+ def __call__(self, message):
+ self._count = self._count + 1
+ raise ExceptionWithUserContext(message, self.contexts_[:],
+ stack=traceback.extract_stack())
+
+
+
+