revlog: replace revlog._io.size with a new revlog.index.entry_size
The `revlogio` class is mostly a relic from the past. Once in charge of the full
revlog related Input/Output code, that class gradually lost responsibilities to
the point where more IO are now done by `revlog.index` objects or revlog objects
themself. I would like to ultimately remove the `revlogio` class, to do so I
start simple with move the "entry size" information on the index. (The index is
already responsible of the binary unpacking, so it knows the size.
Differential Revision: https://phab.mercurial-scm.org/D10309
$ . "$TESTDIR/narrow-library.sh"
create full repo
$ hg init master
$ cd master
$ echo init > init
$ hg ci -Aqm 'initial'
$ mkdir inside
$ echo inside > inside/f1
$ mkdir outside
$ echo outside > outside/f1
$ hg ci -Aqm 'add inside and outside'
$ echo modified > inside/f1
$ hg ci -qm 'modify inside'
$ echo modified > outside/f1
$ hg ci -qm 'modify outside'
$ cd ..
$ hg clone --narrow ssh://user@dummy/master narrow --include inside
requesting all changes
adding changesets
adding manifests
adding file changes
added 4 changesets with 2 changes to 1 files
new changesets *:* (glob)
updating to branch default
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ cd narrow
$ hg debugindex -c
rev linkrev nodeid p1 p2
0 0 9958b1af2add 000000000000 000000000000
1 1 2db4ce2a3bfe 9958b1af2add 000000000000
2 2 0980ee31a742 2db4ce2a3bfe 000000000000
3 3 4410145019b7 0980ee31a742 000000000000
$ hg update -q 0
Can update to revision with changes inside
$ hg update -q 'desc("add inside and outside")'
$ hg update -q 'desc("modify inside")'
$ find *
inside
inside/f1
$ cat inside/f1
modified
Can update to revision with changes outside
$ hg update -q 'desc("modify outside")'
$ find *
inside
inside/f1
$ cat inside/f1
modified
Can update with a deleted file inside
$ hg rm inside/f1
$ hg update -q 'desc("modify inside")'
$ hg update -q 'desc("modify outside")'
$ hg update -q 'desc("initial")'
$ hg update -q 'desc("modify inside")'
Can update with a moved file inside
$ hg mv inside/f1 inside/f2
$ hg update -q 'desc("modify outside")'
$ hg update -q 'desc("add inside and outside")'
$ hg update -q 'desc("modify inside")'