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Bazaar Apport Integration
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Bazaar can use Apport <http://launchpad.net/apport/> to capture data about
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unexpected errors (probably, bugs in Bazaar) and report them to the
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This is only active for errors that are believed to be internal errors (ie
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bugs) not user or environmental errors. (See the Developer Guide.)
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Consequences for users
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----------------------
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* They shouldn't normally need to see or copy&paste a traceback.
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* They will be able to inspect the files before sending them to be sure
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there's no sensitive data included.
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* As at present, they'll need a Launchpad account to report bugs in the
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The use of apport by Bazaar is independent of the configuration in the OS.
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For example in Ubuntu, apport is normally inactive in release builds, and
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normally excludes software not installed from a package. We'll bypass
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Putting in this handler may mean that an OS-wide exception handler never
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sees the error, but that was true with our existing exception-printer.
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The user should have the option to: forget about the crash (and ignore the
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bug report), see the contents of the report, file a bug, or save the
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report to file later. At the moment we just show them the filename and
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let them take it from there.
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#. An exception reaches the top-level handler.
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#. We log it in apport-format to a file in ~/.bazaar/crash.
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#. We tell the user where that file is, and invite them to file a bug
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This won't be active for bugs that cause the whole Python interpreter to
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crash. This can be handled at the OS level. The nice thing is that if
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apport is active system-wide, it will catch either exceptions in our
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in-process apport handler, or errors that crash the intrepreter.
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* Capture apport data even for things not believed to be internal errors,
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because sometimes they are in fact bugs. Then the user can attach the
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apport report later if they decide to file a bug. There may be quite a
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lot of them so we might need to limit the number that are stored, or do
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this when a debug flag is set. At the moment they go into .bzr.log and
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that's probably ok to start with.
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* Raising an error from the breakin debugger should cause this to fire.
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* Developers looking at a crash on their own machine will probably in the
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first instance just want to see the traceback. Apport files may be more
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longwinded than our current output and might make the traceback scroll
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* Automatically trace messages (ie from .bzr.log) in the report. We could
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just include the whole file, but it may be long, and including the whole
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thing has a greater risk of including sensitive data.
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* Ask the user what they want to do with the report: automatically file
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it, look at it, see just the traceback, just be told where it is. This
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could be done through the UIFactory so that it can be done through a
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However, if we've already had an unhandled error in this process there
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may be problems in Bazaar that prevent us presenting a clean message...
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Possibly these bugs are better reported in the next time bzr runs.