comparison tests/test-extension.t @ 32723:b6384b3d4ebe

tests: add test demonstrating how broken third-party extensions can get

I intend to fix this, but will do the fix as a separate change to make
the behavior change obvious. This was inspired by some users having
the patience diff extension, which broke when we moved bdiff.so so
thoroughly the users can't even run 'hg debuginstall'.

32722:de09138bf0f5

  > EOF

  $ hg --config extensions.nonregistrar=`pwd`/nonregistrar.py version > /dev/null
  devel-warn: cmdutil.command is deprecated, use registrar.command to register 'foo'
  (compatibility will be dropped after Mercurial-4.6, update your code.) * (glob)

32723:b6384b3d4ebe

  > EOF

  $ hg --config extensions.nonregistrar=`pwd`/nonregistrar.py version > /dev/null
  devel-warn: cmdutil.command is deprecated, use registrar.command to register 'foo'
  (compatibility will be dropped after Mercurial-4.6, update your code.) * (glob)

Make sure a broken uisetup doesn't globally break hg:
  $ cat > baduisetup.py <<EOF
  > from mercurial import (
  >     bdiff,
  >     extensions,
  > )
  > 
  > def blockswrapper(orig, *args, **kwargs):
  >     return orig(*args, **kwargs)
  > 
  > def uisetup(ui):
  >     extensions.wrapfunction(bdiff, 'blocks', blockswrapper)
  > EOF
  $ cat >> $HGRCPATH <<EOF
  > [extensions]
  > baduisetup = $PWD/baduisetup.py
  > EOF

Broken: an extension that triggers the import of bdiff during uisetup
can't be easily debugged:
  $ hg version
  abort: No module named bdiff!
  (did you forget to compile extensions?)
  [255]