tests/test-issue1175

extensions: catch OSError when hgext is not accessible (issue1708)

Temporary workaround for issue1708: on win32 with py2exe, hgext is distributed
inside a zipped file (which anyway does not contain the py files from which we
ought to extract the documentation strings), which raises a WindowsError
(subclasses OSError).

This means that on such platforms the list of disabled extensions won't be
available. Real fix postponed for after Mercurial 1.3.

#!/bin/sh
rm -rf a
hg init a
cd a
touch a
hg ci -Am0
hg mv a a1
hg ci -m1
hg co 0
hg mv a a2
hg up
hg ci -m2

touch a
hg ci -Am3
hg mv a b
hg ci -Am4 a
hg ci --debug --traceback -Am5 b
hg verify
hg export --git tip