Create repo with old manifest

  $ cat << EOF >> $HGRCPATH

  > [format]

  > usegeneraldelta=yes

  > EOF

  $ hg init existing

  $ cd existing

  $ echo footext > foo

  $ hg add foo

  $ hg commit -m initial

We're using v1, so no manifestv2 entry is in requires yet.

  $ grep manifestv2 .hg/requires

  [1]

Let's clone this with manifestv2 enabled to switch to the new format for

future commits.

  $ cd ..

  $ hg clone --pull existing new --config experimental.manifestv2=1

  requesting all changes

  adding changesets

  adding manifests

  adding file changes

  added 1 changesets with 1 changes to 1 files

  updating to branch default

  1 files updated, 0 files merged, 0 files removed, 0 files unresolved

  $ cd new

Check that entry was added to .hg/requires.

  $ grep manifestv2 .hg/requires

  manifestv2

Make a new commit.

  $ echo newfootext > foo

  $ hg commit -m new

Check that the manifest actually switched to v2.

  $ hg debugdata -m 0

  foo\x0021e958b1dca695a60ee2e9cf151753204ee0f9e9 (esc)

  $ hg debugdata -m 1

  \x00 (esc)

  \x00foo\x00 (esc)

  I\xab\x7f\xb8(\x83\xcas\x15\x9d\xc2\xd3\xd3:5\x08\xbad5_ (esc)

Check that manifestv2 is used if the requirement is present, even if it's

disabled in the config.

  $ echo newerfootext > foo

  $ hg --config experimental.manifestv2=False commit -m newer

  $ hg debugdata -m 2

  \x00 (esc)

  \x00foo\x00 (esc)

  \xa6\xb1\xfb\xef]\x91\xa1\x19`\xf3.#\x90S\xf8\x06 \xe2\x19\x00 (esc)

Check that we can still read v1 manifests.

  $ hg files -r 0

  foo

  $ cd ..

Check that entry is added to .hg/requires on repo creation

  $ hg --config experimental.manifestv2=True init repo

  $ cd repo

  $ grep manifestv2 .hg/requires

  manifestv2

Set up simple repo

  $ echo a > file1

  $ echo b > file2

  $ echo c > file3

  $ hg ci -Aqm 'initial'

  $ echo d > file2

  $ hg ci -m 'modify file2'

Check that 'hg verify', which uses manifest.readdelta(), works

  $ hg verify

  checking changesets

  checking manifests

  crosschecking files in changesets and manifests

  checking files

  3 files, 2 changesets, 4 total revisions

Check that manifest revlog is smaller than for v1

  $ hg debugindex -m

     rev    offset  length  delta linkrev nodeid       p1           p2

       0         0      81     -1       0 57361477c778 000000000000 000000000000

       1        81      33      0       1 aeaab5a2ef74 57361477c778 000000000000