revlog: support reading generaldelta revlogs
Generaldelta is a new revlog global flag. When it's turned on, the base field
of each revision entry holds the deltaparent instead of the base revision of
the current delta chain.
This allows for great potential flexibility when generating deltas, as any
revision can serve as deltaparent. Previously, the deltaparent for revision r
was hardcoded to be r - 1.
The base revision of the delta chain can still be accessed as before, since it
is now computed in an iterative fashion, following the deltaparents backwards.
$ cat >> $HGRCPATH <<EOF
> [extensions]
> convert=
> graphlog=
> EOF
$ hg init t
$ cd t
$ echo a >> a
$ hg ci -Am a0 -d '1 0'
adding a
$ hg branch brancha
marked working directory as branch brancha
$ echo a >> a
$ hg ci -m a1 -d '2 0'
$ echo a >> a
$ hg ci -m a2 -d '3 0'
$ echo a >> a
$ hg ci -m a3 -d '4 0'
$ hg up -C 0
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ hg branch branchb
marked working directory as branch branchb
$ echo b >> b
$ hg ci -Am b0 -d '6 0'
adding b
$ hg up -C brancha
1 files updated, 0 files merged, 1 files removed, 0 files unresolved
$ echo a >> a
$ hg ci -m a4 -d '5 0'
$ echo a >> a
$ hg ci -m a5 -d '7 0'
$ echo a >> a
$ hg ci -m a6 -d '8 0'
$ hg up -C branchb
2 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ echo b >> b
$ hg ci -m b1 -d '9 0'
$ cd ..
convert with datesort
$ hg convert --datesort t t-datesort
initializing destination t-datesort repository
scanning source...
sorting...
converting...
8 a0
7 a1
6 a2
5 a3
4 a4
3 b0
2 a5
1 a6
0 b1
graph converted repo
$ hg -R t-datesort glog --template '{rev} "{desc}"\n'
o 8 "b1"
|
| o 7 "a6"
| |
| o 6 "a5"
| |
o | 5 "b0"
| |
| o 4 "a4"
| |
| o 3 "a3"
| |
| o 2 "a2"
| |
| o 1 "a1"
|/
o 0 "a0"
convert with datesort (default mode)
$ hg convert t t-sourcesort
initializing destination t-sourcesort repository
scanning source...
sorting...
converting...
8 a0
7 a1
6 a2
5 a3
4 b0
3 a4
2 a5
1 a6
0 b1
graph converted repo
$ hg -R t-sourcesort glog --template '{rev} "{desc}"\n'
o 8 "b1"
|
| o 7 "a6"
| |
| o 6 "a5"
| |
| o 5 "a4"
| |
o | 4 "b0"
| |
| o 3 "a3"
| |
| o 2 "a2"
| |
| o 1 "a1"
|/
o 0 "a0"