view tests/test-dirstate-backup.t @ 42455:5ca136bbd3f6

worker: support parallelization of functions with return values

Currently worker supports running functions that return a progress
iterator. Generalize it to handle function that return a progress
iterator then a return value.

It's unused in this commit, but will be used in the next one.

Differential Revision: https://phab.mercurial-scm.org/D6515

Set up

  $ hg init repo
  $ cd repo

Try to import an empty patch

  $ hg import --no-commit - <<EOF
  > EOF
  applying patch from stdin
  abort: stdin: no diffs found
  [255]

No dirstate backups are left behind

  $ ls .hg/dirstate* | sort
  .hg/dirstate