localrepo: avoid unnecessary conversion from node to rev
changelog.heads() first calls headrevs then converts them to nodes.
localrepo.heads() then sorts them using self.changelog.rev function and makes
useless conversion back to revs. Instead let's call changelog.headrevs() from
localrepo.heads(), sort the output and then convert to nodes. Because headrevs
does not support start parameter this optimization only works if start is None.
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