D6355: shelve: add `update --shelve` if shelve extension is loaded

[mharbison72 (Matt Harbison)]

mharbison72 added a comment.


  In https://phab.mercurial-scm.org/D6355#92614, @mharbison72 wrote:
  
  > Should this abort if subrepos are present, since you can't shelve a subrepo?  No -S is available on `update`, but maybe looking for .hgsub with any contents is good enough?
  
  
  On second thought, maybe just check for dirty subrepos so that this isn’t completely incompatible with subrepos.

REPOSITORY
  rHG Mercurial

REVISION DETAIL
  https://phab.mercurial-scm.org/D6355

To: pulkit, #hg-reviewers
Cc: mharbison72, martinvonz, mercurial-devel