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.
$ hg init
$ echo "[merge]" >> .hg/hgrc
$ echo "followcopies = 1" >> .hg/hgrc
$ echo foo > a
$ echo foo > a2
$ hg add a a2
$ hg ci -m "start"
$ hg mv a b
$ hg mv a2 b2
$ hg ci -m "rename"
$ hg co 0
2 files updated, 0 files merged, 2 files removed, 0 files unresolved
$ echo blahblah > a
$ echo blahblah > a2
$ hg mv a2 c2
$ hg ci -m "modify"
created new head
$ hg merge -y --debug
searching for copies back to rev 1
unmatched files in local:
c2
unmatched files in other:
b
b2
all copies found (* = to merge, ! = divergent):
c2 -> a2 !
b -> a *
b2 -> a2 !
checking for directory renames
a2: divergent renames -> dr
resolving manifests
overwrite None partial False
ancestor af1939970a1c local 044f8520aeeb+ remote 85c198ef2f6c
a: remote moved to b -> m
b2: remote created -> g
preserving a for resolve of b
removing a
updating: a 1/3 files (33.33%)
picked tool 'internal:merge' for b (binary False symlink False)
merging a and b to b
my b@044f8520aeeb+ other b@85c198ef2f6c ancestor a@af1939970a1c
premerge successful
updating: a2 2/3 files (66.67%)
note: possible conflict - a2 was renamed multiple times to:
c2
b2
updating: b2 3/3 files (100.00%)
getting b2
1 files updated, 1 files merged, 0 files removed, 0 files unresolved
(branch merge, don't forget to commit)
$ hg status -AC
M b
a
M b2
R a
C c2
$ cat b
blahblah
$ hg ci -m "merge"
$ hg debugindex b
rev offset length base linkrev nodeid p1 p2
0 0 67 0 1 57eacc201a7f 000000000000 000000000000
1 67 72 1 3 4727ba907962 000000000000 57eacc201a7f
$ hg debugrename b
b renamed from a:dd03b83622e78778b403775d0d074b9ac7387a66
This used to trigger a "divergent renames" warning, despite no renames
$ hg cp b b3
$ hg cp b b4
$ hg ci -A -m 'copy b twice'
$ hg up eb92d88a9712
0 files updated, 0 files merged, 2 files removed, 0 files unresolved
$ hg up
2 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ hg rm b3 b4
$ hg ci -m 'clean up a bit of our mess'
We'd rather not warn on divergent renames done in the same changeset (issue2113)
$ hg cp b b3
$ hg mv b b4
$ hg ci -A -m 'divergent renames in same changeset'
$ hg up c761c6948de0
1 files updated, 0 files merged, 2 files removed, 0 files unresolved
$ hg up
note: possible conflict - b was renamed multiple times to:
b3
b4
2 files updated, 0 files merged, 1 files removed, 0 files unresolved
Check for issue2642
$ hg init t
$ cd t
$ echo c0 > f1
$ hg ci -Aqm0
$ hg up null -q
$ echo c1 > f1 # backport
$ hg ci -Aqm1
$ hg mv f1 f2
$ hg ci -qm2
$ hg up 0 -q
$ hg merge 1 -q --tool internal:local
$ hg ci -qm3
$ hg merge 2
merging f1 and f2 to f2
0 files updated, 1 files merged, 0 files removed, 0 files unresolved
(branch merge, don't forget to commit)
$ cat f2
c0
Check for issue2089
$ hg init repo2089
$ cd repo2089
$ echo c0 > f1
$ hg ci -Aqm0
$ hg up null -q
$ echo c1 > f1
$ hg ci -Aqm1
$ hg up 0 -q
$ hg merge 1 -q --tool internal:local
$ echo c2 > f1
$ hg ci -qm2
$ hg up 1 -q
$ hg mv f1 f2
$ hg ci -Aqm3
$ hg up 2 -q
$ hg merge 3
merging f1 and f2 to f2
0 files updated, 1 files merged, 0 files removed, 0 files unresolved
(branch merge, don't forget to commit)
$ cat f2
c2