[PATCH 5 of 8] manifest: add manifestlog.get to obtain subdirectory instances

[Durham Goode]

On 9/15/16 9:51 AM, Martin von Zweigbergk wrote:
> On Wed, Sep 14, 2016 at 4:04 PM, Durham Goode <durham at fb.com> wrote:
>> # HG changeset patch
>> # User Durham Goode <durham at fb.com>
>> # Date 1473893509 25200
>> #      Wed Sep 14 15:51:49 2016 -0700
>> # Node ID 33a7df42b989c555972280f6b84e2fac38babf7b
>> # Parent  d41da1522f8efb5bf5aa75a51f0093b1129b6b5a
>> manifest: add manifestlog.get to obtain subdirectory instances
>>
>> Previously manifestlog only allowed obtaining root level manifests. Future
>> patches will need direct access to subdirectory manifests as part of changegroup
>> creation,
> Can I ask for this patch to be moved closer to those future patches so
> it's easier to see how this is related and that the API makes sense
> for those patches? I haven't checked to make sure, but the next
> patches in this series didn't seem to depend on this patch. I can just
> drop this patch in flight if you agree.
manifestlog.get() is actually necessary for patch #7 in this series, 
which requires access to the directory specific manifestctx to replace 
readshallowfast during changegroup creation.