D738: directaccess: add support to export and tests to demonstrate things

[pulkit (Pulkit Goyal)]

pulkit abandoned this revision.
pulkit added a comment.


  Resend the series as https://phab.mercurial-scm.org/D1140 - https://phab.mercurial-scm.org/D1144.

REPOSITORY
  rHG Mercurial

REVISION DETAIL
  https://phab.mercurial-scm.org/D738

To: pulkit, #hg-reviewers, durham, ryanmce
Cc: ryanmce, durham, mercurial-devel