shrink-revlog: improve performance: use changegroup instead of revisions
Before:
real 0m23.971s
Now:
real 0m4.229s
The only case where the output would be different is if the newer hg was using
a different diff algorithm than used originally.
% init repo1
% add a; ci
adding a
% cat .hg/store/fncache
data/a.i
% add a.i/b; ci
adding a.i/b
% cat .hg/store/fncache
data/a.i
data/a.i.hg/b.i
% add a.i.hg/c; ci
adding a.i.hg/c
% cat .hg/store/fncache
data/a.i
data/a.i.hg/b.i
data/a.i.hg.hg/c.i
% hg verify
checking changesets
checking manifests
crosschecking files in changesets and manifests
checking files
3 files, 3 changesets, 3 total revisions
% rm .hg/store/fncache
% hg verify
checking changesets
checking manifests
crosschecking files in changesets and manifests
checking files
data/a.i@0: missing revlog!
data/a.i.hg/c.i@2: missing revlog!
data/a.i/b.i@1: missing revlog!
3 files, 3 changesets, 3 total revisions
3 integrity errors encountered!
(first damaged changeset appears to be 0)
% non store repo
adding tst.d/foo
.hg
.hg/00changelog.i
.hg/00manifest.i
.hg/data
.hg/data/tst.d.hg
.hg/data/tst.d.hg/foo.i
.hg/dirstate
.hg/last-message.txt
.hg/requires
.hg/undo
.hg/undo.branch
.hg/undo.dirstate
% non fncache repo
adding tst.d/Foo
.hg
.hg/00changelog.i
.hg/dirstate
.hg/last-message.txt
.hg/requires
.hg/store
.hg/store/00changelog.i
.hg/store/00manifest.i
.hg/store/data
.hg/store/data/tst.d.hg
.hg/store/data/tst.d.hg/_foo.i
.hg/store/undo
.hg/undo.branch
.hg/undo.dirstate