For this script verbose mode was added in 57bca1f0 (Add -v option to
control whether tracebacks are printed.) and was later broken in
6dd809d2 (Converted to a buildout and converted externals to
dependencies.) - the change forgot to add global specifier for VERBOSE
variable while moving its assignment into function context.

As a result currently we have

    $ python ./src/ZODB/scripts/fsrefs.py -v data.fs
    Traceback (most recent call last):
      File "./src/ZODB/scripts/fsrefs.py", line 155, in <module>
        main()
      File "./src/ZODB/scripts/fsrefs.py", line 104, in main
        VERBOSE += 1
    UnboundLocalError: local variable 'VERBOSE' referenced before assignment

Fix it.

Fix for #16

Thanks!

see https://github.com/zopefoundation/ZODB/issues/16

see https://github.com/zopefoundation/ZODB/issues/16

For pypy, set the persistent_id attribute of the pickler, since it uses a python implementation even in Py2

This adds 'repozo --verify' to check your backup integrity

Extract size/checksum computation logic into separate functions for
gzipped and non-gzipped files.

Could be used as a workaround for https://bugs.launchpad.net/zodb/+bug/906057

Should fix http://winbot.zope.org/builders/ZODB_dev%20py_265_win32/builds/1086/steps/test/logs/stdio

Should fix a test failure on Windows:
http://winbot.zope.org/builders/ZODB_dev%20py_265_win32/builds/1083/steps/test/logs/stdio

Also, avoid shadowing the 'file' builtin / alias with locals.

- Allow protocol 3 under Python 3.

- Do not stori bytes as strings under Python 3.

Fixes issue #4.

That doesn't work, just causes all but one of the functional test layers
to be silently skipped (thanks to zopefoundation/zope.testrunner#5 and
zopefoundation/zope.testrunner#6).

I don't know why zope.testrunner quits after the first layer.  I don't
want to know.  Let's try running tests exactly the same way as tox.ini.