tests/test-treemanifest.t

wireproto: support for receiving multiple requests

Now that we have request IDs on each frame and a specification
that allows multiple requests to be issued simultaneously,
possibly interleaved, let's teach the server to deal with that.

Instead of tracking the state for *the* active command request,
we instead track the state of each receiving command by its
request ID. The multiple states in our state machine for processing
each command's state has been collapsed into a single state for
"receiving commands."

Tests have been added so our branch coverage covers all meaningful
branches.

However, we did lose some logical coverage. The implementation
of this new feature opens up the door to a server having partial
command requests when end of input is reached. We will probably
want a mechanism to deal with partial requests. For now, I've
tracked that as a known issue in the class docstring. I've
also noted an abuse vector that becomes a little bit easier to
exploit with this feature.

Differential Revision: https://phab.mercurial-scm.org/D2870

#require killdaemons

  $ cat << EOF >> $HGRCPATH
  > [format]
  > usegeneraldelta=yes
  > [ui]
  > ssh=$PYTHON "$TESTDIR/dummyssh"
  > EOF

Set up repo

  $ hg --config experimental.treemanifest=True init repo
  $ cd repo

Requirements get set on init

  $ grep treemanifest .hg/requires
  treemanifest

Without directories, looks like any other repo

  $ echo 0 > a
  $ echo 0 > b
  $ hg ci -Aqm initial
  $ hg debugdata -m 0
  a\x00362fef284ce2ca02aecc8de6d5e8a1c3af0556fe (esc)
  b\x00362fef284ce2ca02aecc8de6d5e8a1c3af0556fe (esc)

Submanifest is stored in separate revlog

  $ mkdir dir1
  $ echo 1 > dir1/a
  $ echo 1 > dir1/b
  $ echo 1 > e
  $ hg ci -Aqm 'add dir1'
  $ hg debugdata -m 1
  a\x00362fef284ce2ca02aecc8de6d5e8a1c3af0556fe (esc)
  b\x00362fef284ce2ca02aecc8de6d5e8a1c3af0556fe (esc)
  dir1\x008b3ffd73f901e83304c83d33132c8e774ceac44et (esc)
  e\x00b8e02f6433738021a065f94175c7cd23db5f05be (esc)
  $ hg debugdata --dir dir1 0
  a\x00b8e02f6433738021a065f94175c7cd23db5f05be (esc)
  b\x00b8e02f6433738021a065f94175c7cd23db5f05be (esc)

Can add nested directories

  $ mkdir dir1/dir1
  $ echo 2 > dir1/dir1/a
  $ echo 2 > dir1/dir1/b
  $ mkdir dir1/dir2
  $ echo 2 > dir1/dir2/a
  $ echo 2 > dir1/dir2/b
  $ hg ci -Aqm 'add dir1/dir1'
  $ hg files -r .
  a
  b
  dir1/a
  dir1/b
  dir1/dir1/a
  dir1/dir1/b
  dir1/dir2/a
  dir1/dir2/b
  e

The manifest command works

  $ hg manifest
  a
  b
  dir1/a
  dir1/b
  dir1/dir1/a
  dir1/dir1/b
  dir1/dir2/a
  dir1/dir2/b
  e

Revision is not created for unchanged directory

  $ mkdir dir2
  $ echo 3 > dir2/a
  $ hg add dir2
  adding dir2/a
  $ hg debugindex --dir dir1 > before
  $ hg ci -qm 'add dir2'
  $ hg debugindex --dir dir1 > after
  $ diff before after
  $ rm before after

Removing directory does not create an revlog entry

  $ hg rm dir1/dir1
  removing dir1/dir1/a
  removing dir1/dir1/b
  $ hg debugindex --dir dir1/dir1 > before
  $ hg ci -qm 'remove dir1/dir1'
  $ hg debugindex --dir dir1/dir1 > after
  $ diff before after
  $ rm before after

Check that hg files (calls treemanifest.walk()) works
without loading all directory revlogs

  $ hg co 'desc("add dir2")'
  2 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ mv .hg/store/meta/dir2 .hg/store/meta/dir2-backup
  $ hg files -r . dir1
  dir1/a
  dir1/b
  dir1/dir1/a
  dir1/dir1/b
  dir1/dir2/a
  dir1/dir2/b

Check that status between revisions works (calls treemanifest.matches())
without loading all directory revlogs

  $ hg status --rev 'desc("add dir1")' --rev . dir1
  A dir1/dir1/a
  A dir1/dir1/b
  A dir1/dir2/a
  A dir1/dir2/b
  $ mv .hg/store/meta/dir2-backup .hg/store/meta/dir2

Merge creates 2-parent revision of directory revlog

  $ echo 5 > dir1/a
  $ hg ci -Aqm 'modify dir1/a'
  $ hg co '.^'
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ echo 6 > dir1/b
  $ hg ci -Aqm 'modify dir1/b'
  $ hg merge 'desc("modify dir1/a")'
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  (branch merge, don't forget to commit)
  $ hg ci -m 'conflict-free merge involving dir1/'
  $ cat dir1/a
  5
  $ cat dir1/b
  6
  $ hg debugindex --dir dir1
     rev    offset  length  delta linkrev nodeid       p1           p2
       0         0      54     -1       1 8b3ffd73f901 000000000000 000000000000
       1        54      68      0       2 68e9d057c5a8 8b3ffd73f901 000000000000
       2       122      12      1       4 4698198d2624 68e9d057c5a8 000000000000
       3       134      55      1       5 44844058ccce 68e9d057c5a8 000000000000
       4       189      55      1       6 bf3d9b744927 68e9d057c5a8 000000000000
       5       244      55      4       7 dde7c0af2a03 bf3d9b744927 44844058ccce

Merge keeping directory from parent 1 does not create revlog entry. (Note that
dir1's manifest does change, but only because dir1/a's filelog changes.)

  $ hg co 'desc("add dir2")'
  2 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ echo 8 > dir2/a
  $ hg ci -m 'modify dir2/a'
  created new head

  $ hg debugindex --dir dir2 > before
  $ hg merge 'desc("modify dir1/a")'
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  (branch merge, don't forget to commit)
  $ hg revert -r 'desc("modify dir2/a")' .
  reverting dir1/a
  $ hg ci -m 'merge, keeping parent 1'
  $ hg debugindex --dir dir2 > after
  $ diff before after
  $ rm before after

Merge keeping directory from parent 2 does not create revlog entry. (Note that
dir2's manifest does change, but only because dir2/a's filelog changes.)

  $ hg co 'desc("modify dir2/a")'
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ hg debugindex --dir dir1 > before
  $ hg merge 'desc("modify dir1/a")'
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  (branch merge, don't forget to commit)
  $ hg revert -r 'desc("modify dir1/a")' .
  reverting dir2/a
  $ hg ci -m 'merge, keeping parent 2'
  created new head
  $ hg debugindex --dir dir1 > after
  $ diff before after
  $ rm before after

Create flat source repo for tests with mixed flat/tree manifests

  $ cd ..
  $ hg init repo-flat
  $ cd repo-flat

Create a few commits with flat manifest

  $ echo 0 > a
  $ echo 0 > b
  $ echo 0 > e
  $ for d in dir1 dir1/dir1 dir1/dir2 dir2
  > do
  >   mkdir $d
  >   echo 0 > $d/a
  >   echo 0 > $d/b
  > done
  $ hg ci -Aqm initial

  $ echo 1 > a
  $ echo 1 > dir1/a
  $ echo 1 > dir1/dir1/a
  $ hg ci -Aqm 'modify on branch 1'

  $ hg co 0
  3 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ echo 2 > b
  $ echo 2 > dir1/b
  $ echo 2 > dir1/dir1/b
  $ hg ci -Aqm 'modify on branch 2'

  $ hg merge 1
  3 files updated, 0 files merged, 0 files removed, 0 files unresolved
  (branch merge, don't forget to commit)
  $ hg ci -m 'merge of flat manifests to new flat manifest'

  $ hg serve -p $HGPORT -d --pid-file=hg.pid --errorlog=errors.log
  $ cat hg.pid >> $DAEMON_PIDS

Create clone with tree manifests enabled

  $ cd ..
  $ hg clone --config experimental.treemanifest=1 \
  >   http://localhost:$HGPORT repo-mixed -r 1
  adding changesets
  adding manifests
  adding file changes
  added 2 changesets with 14 changes to 11 files
  new changesets 5b02a3e8db7e:581ef6037d8b
  updating to branch default
  11 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ cd repo-mixed
  $ test -d .hg/store/meta
  [1]
  $ grep treemanifest .hg/requires
  treemanifest

Should be possible to push updates from flat to tree manifest repo

  $ hg -R ../repo-flat push ssh://user@dummy/repo-mixed
  pushing to ssh://user@dummy/repo-mixed
  searching for changes
  remote: adding changesets
  remote: adding manifests
  remote: adding file changes
  remote: added 2 changesets with 3 changes to 3 files

Commit should store revlog per directory

  $ hg co 1
  0 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ echo 3 > a
  $ echo 3 > dir1/a
  $ echo 3 > dir1/dir1/a
  $ hg ci -m 'first tree'
  created new head
  $ find .hg/store/meta | sort
  .hg/store/meta
  .hg/store/meta/dir1
  .hg/store/meta/dir1/00manifest.i
  .hg/store/meta/dir1/dir1
  .hg/store/meta/dir1/dir1/00manifest.i
  .hg/store/meta/dir1/dir2
  .hg/store/meta/dir1/dir2/00manifest.i
  .hg/store/meta/dir2
  .hg/store/meta/dir2/00manifest.i

Merge of two trees

  $ hg co 2
  6 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ hg merge 1
  3 files updated, 0 files merged, 0 files removed, 0 files unresolved
  (branch merge, don't forget to commit)
  $ hg ci -m 'merge of flat manifests to new tree manifest'
  created new head
  $ hg diff -r 3

Parent of tree root manifest should be flat manifest, and two for merge

  $ hg debugindex -m
     rev    offset  length  delta linkrev nodeid       p1           p2
       0         0      80     -1       0 40536115ed9e 000000000000 000000000000
       1        80      83      0       1 f3376063c255 40536115ed9e 000000000000
       2       163      89      0       2 5d9b9da231a2 40536115ed9e 000000000000
       3       252      83      2       3 d17d663cbd8a 5d9b9da231a2 f3376063c255
       4       335     124      1       4 51e32a8c60ee f3376063c255 000000000000
       5       459     126      2       5 cc5baa78b230 5d9b9da231a2 f3376063c255


Status across flat/tree boundary should work

  $ hg status --rev '.^' --rev .
  M a
  M dir1/a
  M dir1/dir1/a


Turning off treemanifest config has no effect

  $ hg debugindex --dir dir1
     rev    offset  length  delta linkrev nodeid       p1           p2
       0         0     127     -1       4 064927a0648a 000000000000 000000000000
       1       127     111      0       5 25ecb8cb8618 000000000000 000000000000
  $ echo 2 > dir1/a
  $ hg --config experimental.treemanifest=False ci -qm 'modify dir1/a'
  $ hg debugindex --dir dir1
     rev    offset  length  delta linkrev nodeid       p1           p2
       0         0     127     -1       4 064927a0648a 000000000000 000000000000
       1       127     111      0       5 25ecb8cb8618 000000000000 000000000000
       2       238      55      1       6 5b16163a30c6 25ecb8cb8618 000000000000

Stripping and recovering changes should work

  $ hg st --change tip
  M dir1/a
  $ hg --config extensions.strip= strip tip
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  saved backup bundle to $TESTTMP/repo-mixed/.hg/strip-backup/51cfd7b1e13b-78a2f3ed-backup.hg
  $ hg debugindex --dir dir1
     rev    offset  length  delta linkrev nodeid       p1           p2
       0         0     127     -1       4 064927a0648a 000000000000 000000000000
       1       127     111      0       5 25ecb8cb8618 000000000000 000000000000
  $ hg incoming .hg/strip-backup/*
  comparing with .hg/strip-backup/*-backup.hg (glob)
  searching for changes
  changeset:   6:51cfd7b1e13b
  tag:         tip
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     modify dir1/a
  
  $ hg pull .hg/strip-backup/*
  pulling from .hg/strip-backup/51cfd7b1e13b-78a2f3ed-backup.hg
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  added 1 changesets with 1 changes to 1 files
  new changesets 51cfd7b1e13b
  (run 'hg update' to get a working copy)
  $ hg --config extensions.strip= strip tip
  saved backup bundle to $TESTTMP/repo-mixed/.hg/strip-backup/*-backup.hg (glob)
  $ hg unbundle -q .hg/strip-backup/*
  $ hg debugindex --dir dir1
     rev    offset  length  delta linkrev nodeid       p1           p2
       0         0     127     -1       4 064927a0648a 000000000000 000000000000
       1       127     111      0       5 25ecb8cb8618 000000000000 000000000000
       2       238      55      1       6 5b16163a30c6 25ecb8cb8618 000000000000
  $ hg st --change tip
  M dir1/a

Shelving and unshelving should work

  $ echo foo >> dir1/a
  $ hg --config extensions.shelve= shelve
  shelved as default
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ hg --config extensions.shelve= unshelve
  unshelving change 'default'
  $ hg diff --nodates
  diff -r 708a273da119 dir1/a
  --- a/dir1/a
  +++ b/dir1/a
  @@ -1,1 +1,2 @@
   1
  +foo

Pushing from treemanifest repo to an empty repo makes that a treemanifest repo

  $ cd ..
  $ hg init empty-repo
  $ cat << EOF >> empty-repo/.hg/hgrc
  > [experimental]
  > changegroup3=yes
  > EOF
  $ grep treemanifest empty-repo/.hg/requires
  [1]
  $ hg push -R repo -r 0 empty-repo
  pushing to empty-repo
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  added 1 changesets with 2 changes to 2 files
  $ grep treemanifest empty-repo/.hg/requires
  treemanifest

Pushing to an empty repo works

  $ hg --config experimental.treemanifest=1 init clone
  $ grep treemanifest clone/.hg/requires
  treemanifest
  $ hg push -R repo clone
  pushing to clone
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  added 11 changesets with 15 changes to 10 files (+3 heads)
  $ grep treemanifest clone/.hg/requires
  treemanifest
  $ hg -R clone verify
  checking changesets
  checking manifests
  checking directory manifests
  crosschecking files in changesets and manifests
  checking files
  10 files, 11 changesets, 15 total revisions

Create deeper repo with tree manifests.

  $ hg --config experimental.treemanifest=True init deeprepo
  $ cd deeprepo

  $ mkdir .A
  $ mkdir b
  $ mkdir b/bar
  $ mkdir b/bar/orange
  $ mkdir b/bar/orange/fly
  $ mkdir b/foo
  $ mkdir b/foo/apple
  $ mkdir b/foo/apple/bees

  $ touch .A/one.txt
  $ touch .A/two.txt
  $ touch b/bar/fruits.txt
  $ touch b/bar/orange/fly/gnat.py
  $ touch b/bar/orange/fly/housefly.txt
  $ touch b/foo/apple/bees/flower.py
  $ touch c.txt
  $ touch d.py

  $ hg ci -Aqm 'initial'

  $ echo >> .A/one.txt
  $ echo >> .A/two.txt
  $ echo >> b/bar/fruits.txt
  $ echo >> b/bar/orange/fly/gnat.py
  $ echo >> b/bar/orange/fly/housefly.txt
  $ echo >> b/foo/apple/bees/flower.py
  $ echo >> c.txt
  $ echo >> d.py
  $ hg ci -Aqm 'second'

We'll see that visitdir works by removing some treemanifest revlogs and running
the files command with various parameters.

Test files from the root.

  $ hg files -r .
  .A/one.txt
  .A/two.txt
  b/bar/fruits.txt
  b/bar/orange/fly/gnat.py
  b/bar/orange/fly/housefly.txt
  b/foo/apple/bees/flower.py
  c.txt
  d.py

Excludes with a glob should not exclude everything from the glob's root

  $ hg files -r . -X 'b/fo?' b
  b/bar/fruits.txt
  b/bar/orange/fly/gnat.py
  b/bar/orange/fly/housefly.txt
  $ cp -R .hg/store .hg/store-copy

Test files for a subdirectory.

  $ rm -r .hg/store/meta/~2e_a
  $ hg files -r . b
  b/bar/fruits.txt
  b/bar/orange/fly/gnat.py
  b/bar/orange/fly/housefly.txt
  b/foo/apple/bees/flower.py
  $ hg diff -r '.^' -r . --stat b
   b/bar/fruits.txt              |  1 +
   b/bar/orange/fly/gnat.py      |  1 +
   b/bar/orange/fly/housefly.txt |  1 +
   b/foo/apple/bees/flower.py    |  1 +
   4 files changed, 4 insertions(+), 0 deletions(-)
  $ cp -R .hg/store-copy/. .hg/store

Test files with just includes and excludes.

  $ rm -r .hg/store/meta/~2e_a
  $ rm -r .hg/store/meta/b/bar/orange/fly
  $ rm -r .hg/store/meta/b/foo/apple/bees
  $ hg files -r . -I path:b/bar -X path:b/bar/orange/fly -I path:b/foo -X path:b/foo/apple/bees
  b/bar/fruits.txt
  $ hg diff -r '.^' -r . --stat -I path:b/bar -X path:b/bar/orange/fly -I path:b/foo -X path:b/foo/apple/bees
   b/bar/fruits.txt |  1 +
   1 files changed, 1 insertions(+), 0 deletions(-)
  $ cp -R .hg/store-copy/. .hg/store

Test files for a subdirectory, excluding a directory within it.

  $ rm -r .hg/store/meta/~2e_a
  $ rm -r .hg/store/meta/b/foo
  $ hg files -r . -X path:b/foo b
  b/bar/fruits.txt
  b/bar/orange/fly/gnat.py
  b/bar/orange/fly/housefly.txt
  $ hg diff -r '.^' -r . --stat -X path:b/foo b
   b/bar/fruits.txt              |  1 +
   b/bar/orange/fly/gnat.py      |  1 +
   b/bar/orange/fly/housefly.txt |  1 +
   3 files changed, 3 insertions(+), 0 deletions(-)
  $ cp -R .hg/store-copy/. .hg/store

Test files for a sub directory, including only a directory within it, and
including an unrelated directory.

  $ rm -r .hg/store/meta/~2e_a
  $ rm -r .hg/store/meta/b/foo
  $ hg files -r . -I path:b/bar/orange -I path:a b
  b/bar/orange/fly/gnat.py
  b/bar/orange/fly/housefly.txt
  $ hg diff -r '.^' -r . --stat -I path:b/bar/orange -I path:a b
   b/bar/orange/fly/gnat.py      |  1 +
   b/bar/orange/fly/housefly.txt |  1 +
   2 files changed, 2 insertions(+), 0 deletions(-)
  $ cp -R .hg/store-copy/. .hg/store

Test files for a pattern, including a directory, and excluding a directory
within that.

  $ rm -r .hg/store/meta/~2e_a
  $ rm -r .hg/store/meta/b/foo
  $ rm -r .hg/store/meta/b/bar/orange
  $ hg files -r . glob:**.txt -I path:b/bar -X path:b/bar/orange
  b/bar/fruits.txt
  $ hg diff -r '.^' -r . --stat glob:**.txt -I path:b/bar -X path:b/bar/orange
   b/bar/fruits.txt |  1 +
   1 files changed, 1 insertions(+), 0 deletions(-)
  $ cp -R .hg/store-copy/. .hg/store

Add some more changes to the deep repo
  $ echo narf >> b/bar/fruits.txt
  $ hg ci -m narf
  $ echo troz >> b/bar/orange/fly/gnat.py
  $ hg ci -m troz

Verify works
  $ hg verify
  checking changesets
  checking manifests
  checking directory manifests
  crosschecking files in changesets and manifests
  checking files
  8 files, 4 changesets, 18 total revisions

Dirlogs are included in fncache
  $ grep meta/.A/00manifest.i .hg/store/fncache
  meta/.A/00manifest.i

Rebuilt fncache includes dirlogs
  $ rm .hg/store/fncache
  $ hg debugrebuildfncache
  adding data/.A/one.txt.i
  adding data/.A/two.txt.i
  adding data/b/bar/fruits.txt.i
  adding data/b/bar/orange/fly/gnat.py.i
  adding data/b/bar/orange/fly/housefly.txt.i
  adding data/b/foo/apple/bees/flower.py.i
  adding data/c.txt.i
  adding data/d.py.i
  adding meta/.A/00manifest.i
  adding meta/b/00manifest.i
  adding meta/b/bar/00manifest.i
  adding meta/b/bar/orange/00manifest.i
  adding meta/b/bar/orange/fly/00manifest.i
  adding meta/b/foo/00manifest.i
  adding meta/b/foo/apple/00manifest.i
  adding meta/b/foo/apple/bees/00manifest.i
  16 items added, 0 removed from fncache

Finish first server
  $ killdaemons.py

Back up the recently added revlogs
  $ cp -R .hg/store .hg/store-newcopy

Verify reports missing dirlog
  $ rm .hg/store/meta/b/00manifest.*
  $ hg verify
  checking changesets
  checking manifests
  checking directory manifests
   0: empty or missing b/
   b/@0: parent-directory manifest refers to unknown revision 67688a370455
   b/@1: parent-directory manifest refers to unknown revision f065da70369e
   b/@2: parent-directory manifest refers to unknown revision ac0d30948e0b
   b/@3: parent-directory manifest refers to unknown revision 367152e6af28
  warning: orphan revlog 'meta/b/bar/00manifest.i'
  warning: orphan revlog 'meta/b/bar/orange/00manifest.i'
  warning: orphan revlog 'meta/b/bar/orange/fly/00manifest.i'
  warning: orphan revlog 'meta/b/foo/00manifest.i'
  warning: orphan revlog 'meta/b/foo/apple/00manifest.i'
  warning: orphan revlog 'meta/b/foo/apple/bees/00manifest.i'
  crosschecking files in changesets and manifests
   b/bar/fruits.txt@0: in changeset but not in manifest
   b/bar/orange/fly/gnat.py@0: in changeset but not in manifest
   b/bar/orange/fly/housefly.txt@0: in changeset but not in manifest
   b/foo/apple/bees/flower.py@0: in changeset but not in manifest
  checking files
  8 files, 4 changesets, 18 total revisions
  6 warnings encountered!
  9 integrity errors encountered!
  (first damaged changeset appears to be 0)
  [1]
  $ cp -R .hg/store-newcopy/. .hg/store

Verify reports missing dirlog entry
  $ mv -f .hg/store-copy/meta/b/00manifest.* .hg/store/meta/b/
  $ hg verify
  checking changesets
  checking manifests
  checking directory manifests
   b/@2: parent-directory manifest refers to unknown revision ac0d30948e0b
   b/@3: parent-directory manifest refers to unknown revision 367152e6af28
   b/bar/@?: rev 2 points to unexpected changeset 2
   b/bar/@?: 44d7e1146e0d not in parent-directory manifest
   b/bar/@?: rev 3 points to unexpected changeset 3
   b/bar/@?: 70b10c6b17b7 not in parent-directory manifest
   b/bar/orange/@?: rev 2 points to unexpected changeset 3
   (expected None)
   b/bar/orange/fly/@?: rev 2 points to unexpected changeset 3
   (expected None)
  crosschecking files in changesets and manifests
  checking files
  8 files, 4 changesets, 18 total revisions
  2 warnings encountered!
  8 integrity errors encountered!
  (first damaged changeset appears to be 2)
  [1]
  $ cp -R .hg/store-newcopy/. .hg/store

Test cloning a treemanifest repo over http.
  $ hg serve -p $HGPORT -d --pid-file=hg.pid --errorlog=errors.log
  $ cat hg.pid >> $DAEMON_PIDS
  $ cd ..
We can clone even with the knob turned off and we'll get a treemanifest repo.
  $ hg clone --config experimental.treemanifest=False \
  >   --config experimental.changegroup3=True \
  >   http://localhost:$HGPORT deepclone
  requesting all changes
  adding changesets
  adding manifests
  adding file changes
  added 4 changesets with 18 changes to 8 files
  new changesets 775704be6f52:523e5c631710
  updating to branch default
  8 files updated, 0 files merged, 0 files removed, 0 files unresolved
No server errors.
  $ cat deeprepo/errors.log
requires got updated to include treemanifest
  $ cat deepclone/.hg/requires | grep treemanifest
  treemanifest
Tree manifest revlogs exist.
  $ find deepclone/.hg/store/meta | sort
  deepclone/.hg/store/meta
  deepclone/.hg/store/meta/b
  deepclone/.hg/store/meta/b/00manifest.i
  deepclone/.hg/store/meta/b/bar
  deepclone/.hg/store/meta/b/bar/00manifest.i
  deepclone/.hg/store/meta/b/bar/orange
  deepclone/.hg/store/meta/b/bar/orange/00manifest.i
  deepclone/.hg/store/meta/b/bar/orange/fly
  deepclone/.hg/store/meta/b/bar/orange/fly/00manifest.i
  deepclone/.hg/store/meta/b/foo
  deepclone/.hg/store/meta/b/foo/00manifest.i
  deepclone/.hg/store/meta/b/foo/apple
  deepclone/.hg/store/meta/b/foo/apple/00manifest.i
  deepclone/.hg/store/meta/b/foo/apple/bees
  deepclone/.hg/store/meta/b/foo/apple/bees/00manifest.i
  deepclone/.hg/store/meta/~2e_a
  deepclone/.hg/store/meta/~2e_a/00manifest.i
Verify passes.
  $ cd deepclone
  $ hg verify
  checking changesets
  checking manifests
  checking directory manifests
  crosschecking files in changesets and manifests
  checking files
  8 files, 4 changesets, 18 total revisions
  $ cd ..

Create clones using old repo formats to use in later tests
  $ hg clone --config format.usestore=False \
  >   --config experimental.changegroup3=True \
  >   http://localhost:$HGPORT deeprepo-basicstore
  requesting all changes
  adding changesets
  adding manifests
  adding file changes
  added 4 changesets with 18 changes to 8 files
  new changesets 775704be6f52:523e5c631710
  updating to branch default
  8 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ cd deeprepo-basicstore
  $ grep store .hg/requires
  [1]
  $ hg serve -p $HGPORT1 -d --pid-file=hg.pid --errorlog=errors.log
  $ cat hg.pid >> $DAEMON_PIDS
  $ cd ..
  $ hg clone --config format.usefncache=False \
  >   --config experimental.changegroup3=True \
  >   http://localhost:$HGPORT deeprepo-encodedstore
  requesting all changes
  adding changesets
  adding manifests
  adding file changes
  added 4 changesets with 18 changes to 8 files
  new changesets 775704be6f52:523e5c631710
  updating to branch default
  8 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ cd deeprepo-encodedstore
  $ grep fncache .hg/requires
  [1]
  $ hg serve -p $HGPORT2 -d --pid-file=hg.pid --errorlog=errors.log
  $ cat hg.pid >> $DAEMON_PIDS
  $ cd ..

Local clone with basicstore
  $ hg clone -U deeprepo-basicstore local-clone-basicstore
  $ hg -R local-clone-basicstore verify
  checking changesets
  checking manifests
  checking directory manifests
  crosschecking files in changesets and manifests
  checking files
  8 files, 4 changesets, 18 total revisions

Local clone with encodedstore
  $ hg clone -U deeprepo-encodedstore local-clone-encodedstore
  $ hg -R local-clone-encodedstore verify
  checking changesets
  checking manifests
  checking directory manifests
  crosschecking files in changesets and manifests
  checking files
  8 files, 4 changesets, 18 total revisions

Local clone with fncachestore
  $ hg clone -U deeprepo local-clone-fncachestore
  $ hg -R local-clone-fncachestore verify
  checking changesets
  checking manifests
  checking directory manifests
  crosschecking files in changesets and manifests
  checking files
  8 files, 4 changesets, 18 total revisions

Stream clone with basicstore
  $ hg clone --config experimental.changegroup3=True --stream -U \
  >   http://localhost:$HGPORT1 stream-clone-basicstore
  streaming all changes
  18 files to transfer, * of data (glob)
  transferred * in * seconds (*) (glob)
  searching for changes
  no changes found
  $ hg -R stream-clone-basicstore verify
  checking changesets
  checking manifests
  checking directory manifests
  crosschecking files in changesets and manifests
  checking files
  8 files, 4 changesets, 18 total revisions

Stream clone with encodedstore
  $ hg clone --config experimental.changegroup3=True --stream -U \
  >   http://localhost:$HGPORT2 stream-clone-encodedstore
  streaming all changes
  18 files to transfer, * of data (glob)
  transferred * in * seconds (*) (glob)
  searching for changes
  no changes found
  $ hg -R stream-clone-encodedstore verify
  checking changesets
  checking manifests
  checking directory manifests
  crosschecking files in changesets and manifests
  checking files
  8 files, 4 changesets, 18 total revisions

Stream clone with fncachestore
  $ hg clone --config experimental.changegroup3=True --stream -U \
  >   http://localhost:$HGPORT stream-clone-fncachestore
  streaming all changes
  18 files to transfer, * of data (glob)
  transferred * in * seconds (*) (glob)
  searching for changes
  no changes found
  $ hg -R stream-clone-fncachestore verify
  checking changesets
  checking manifests
  checking directory manifests
  crosschecking files in changesets and manifests
  checking files
  8 files, 4 changesets, 18 total revisions

Packed bundle
  $ hg -R deeprepo debugcreatestreamclonebundle repo-packed.hg
  writing 5330 bytes for 18 files
  bundle requirements: generaldelta, revlogv1, treemanifest
  $ hg debugbundle --spec repo-packed.hg
  none-packed1;requirements%3Dgeneraldelta%2Crevlogv1%2Ctreemanifest

Bundle with changegroup2 is not supported

  $ hg -R deeprepo bundle --all -t v2 deeprepo.bundle
  abort: repository does not support bundle version 02
  [255]

Pull does not include changegroup for manifest the client already has from
other branch

  $ mkdir grafted-dir-repo
  $ cd grafted-dir-repo
  $ hg --config experimental.treemanifest=1 init
  $ mkdir dir
  $ echo a > dir/file
  $ echo a > file
  $ hg ci -Am initial
  adding dir/file
  adding file
  $ echo b > dir/file
  $ hg ci -m updated
  $ hg co '.^'
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ hg revert -r tip dir/
  reverting dir/file
  $ echo b > file # to make sure root manifest is sent
  $ hg ci -m grafted
  created new head
  $ cd ..

  $ hg --config experimental.treemanifest=1 clone --pull -r 1 \
  >   grafted-dir-repo grafted-dir-repo-clone
  adding changesets
  adding manifests
  adding file changes
  added 2 changesets with 3 changes to 2 files
  new changesets d84f4c419457:09ab742f3b0f
  updating to branch default
  2 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ cd grafted-dir-repo-clone
  $ hg pull -r 2
  pulling from $TESTTMP/grafted-dir-repo
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  added 1 changesets with 1 changes to 1 files (+1 heads)
  new changesets 73699489fb7c
  (run 'hg heads' to see heads, 'hg merge' to merge)

Committing a empty commit does not duplicate root treemanifest
  $ echo z >> z
  $ hg commit -Aqm 'pre-empty commit'
  $ hg rm z
  $ hg commit --amend -m 'empty commit'
  saved backup bundle to $TESTTMP/grafted-dir-repo-clone/.hg/strip-backup/cb99d5717cea-9e3b6b02-amend.hg
  $ hg log -r 'tip + tip^' -T '{manifest}\n'
  1:678d3574b88c
  1:678d3574b88c
  $ hg --config extensions.strip= strip -r . -q