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wireprotov2: define and implement "manifestdata" command...
wireprotov2: define and implement "manifestdata" command The added command can be used for obtaining manifest data. Given a manifest path and set of manifest nodes, data about manifests can be retrieved. Unlike changeset data, we wish to emit deltas to describe manifest revisions. So the command uses the relatively new API for building delta requests and emitting them. The code calls into deltaparent(), which I'm not very keen of. There's still work to be done in delta generation land so implementation details of storage (e.g. exactly one delta is stored/available) don't creep into higher levels. But we can worry about this later (there is already a TODO on imanifestorage tracking this). On the subject of parent deltas, the server assumes parent revisions exist on the receiving end. This is obviously wrong for shallow clone. I've added TODOs to add a mechanism to the command to allow clients to specify desired behavior. This shouldn't be too difficult to implement. Another big change is that the client must explicitly request manifest nodes to retrieve. This is a major departure from "getbundle," where the server derives relevant manifests as it iterates changesets and sends them automatically. As implemented, the client must transmit each requested node to the server. At 20 bytes per node, we're looking at 2 MB per 100,000 nodes. Plus wire encoding overhead. This isn't ideal for clients with limited upload bandwidth. I plan to address this in the future by allowing alternate mechanisms for defining the revisions to retrieve. One idea is to define a range of changeset revisions whose manifest revisions to retrieve (similar to how "changesetdata" works). We almost certainly want an API to look up an individual manifest by node. And that's where I've chosen to start with the implementation. Again, a theme of this early exchangev2 work is I want to start by building primitives for accessing raw repository data first and see how far we can get with those before we need more complexity. Differential Revision: https://phab.mercurial-scm.org/D4488
Boris Feld - - Load All Authors

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test-rebase-collapse.t
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$ cat >> $HGRCPATH <<EOF
> [extensions]
> rebase=
> mq=
> drawdag=$TESTDIR/drawdag.py
>
> [phases]
> publish=False
>
> [alias]
> tglog = log -G --template "{rev}: {node|short} '{desc}' {branches}\n"
> tglogp = log -G --template "{rev}: {node|short} {phase} '{desc}' {branches}\n"
> EOF
Highest phase of source commits is used:
$ hg init phase
$ cd phase
$ hg debugdrawdag << 'EOF'
> D
> |
> F C
> | |
> E B
> |/
> A
> EOF
$ hg phase --force --secret D
$ cat > $TESTTMP/editor.sh <<EOF
> echo "==== before editing"
> cat \$1
> echo "===="
> echo "edited manually" >> \$1
> EOF
$ HGEDITOR="sh $TESTTMP/editor.sh" hg rebase --collapse --keepbranches -e --dest F
rebasing 1:112478962961 "B" (B)
rebasing 3:26805aba1e60 "C" (C)
rebasing 5:f585351a92f8 "D" (D tip)
==== before editing
Collapsed revision
* B
* C
* D
HG: Enter commit message. Lines beginning with 'HG:' are removed.
HG: Leave message empty to abort commit.
HG: --
HG: user: test
HG: branch 'default'
HG: added B
HG: added C
HG: added D
====
saved backup bundle to $TESTTMP/phase/.hg/strip-backup/112478962961-cb2a9b47-rebase.hg
$ hg tglogp
o 3: 92fa5f5fe108 secret 'Collapsed revision
| * B
| * C
| * D
|
|
| edited manually'
o 2: 64a8289d2492 draft 'F'
|
o 1: 7fb047a69f22 draft 'E'
|
o 0: 426bada5c675 draft 'A'
$ hg manifest --rev tip
A
B
C
D
E
F
$ cd ..
Merge gets linearized:
$ hg init linearized-merge
$ cd linearized-merge
$ hg debugdrawdag << 'EOF'
> F D
> |/|
> C B
> |/
> A
> EOF
$ hg phase --force --secret D
$ hg rebase --source B --collapse --dest F
rebasing 1:112478962961 "B" (B)
rebasing 3:4e4f9194f9f1 "D" (D)
saved backup bundle to $TESTTMP/linearized-merge/.hg/strip-backup/112478962961-e389075b-rebase.hg
$ hg tglog
o 3: 5bdc08b7da2b 'Collapsed revision
| * B
| * D'
o 2: afc707c82df0 'F'
|
o 1: dc0947a82db8 'C'
|
o 0: 426bada5c675 'A'
$ hg manifest --rev tip
A
B
C
F
$ cd ..
Custom message:
$ hg init message
$ cd message
$ hg debugdrawdag << 'EOF'
> C
> |
> D B
> |/
> A
> EOF
$ hg rebase --base B -m 'custom message'
abort: message can only be specified with collapse
[255]
$ cat > $TESTTMP/checkeditform.sh <<EOF
> env | grep HGEDITFORM
> true
> EOF
$ HGEDITOR="sh $TESTTMP/checkeditform.sh" hg rebase --source B --collapse -m 'custom message' -e --dest D
rebasing 1:112478962961 "B" (B)
rebasing 3:26805aba1e60 "C" (C tip)
HGEDITFORM=rebase.collapse
saved backup bundle to $TESTTMP/message/.hg/strip-backup/112478962961-f4131707-rebase.hg
$ hg tglog
o 2: 2f197b9a08f3 'custom message'
|
o 1: b18e25de2cf5 'D'
|
o 0: 426bada5c675 'A'
$ hg manifest --rev tip
A
B
C
D
$ cd ..
Rebase and collapse - more than one external (fail):
$ hg init multiple-external-parents
$ cd multiple-external-parents
$ hg debugdrawdag << 'EOF'
> G
> |\
> | F
> | |
> D E
> |\|
> H C B
> \|/
> A
> EOF
$ hg rebase -s C --dest H --collapse
abort: unable to collapse on top of 3, there is more than one external parent: 1, 6
[255]
Rebase and collapse - E onto H:
$ hg rebase -s E --dest I --collapse # root (E) is not a merge
abort: unknown revision 'I'!
[255]
$ hg tglog
o 7: 64e264db77f0 'G'
|\
| o 6: 11abe3fb10b8 'F'
| |
| o 5: 49cb92066bfd 'E'
| |
o | 4: 4e4f9194f9f1 'D'
|\|
| | o 3: 575c4b5ec114 'H'
| | |
o---+ 2: dc0947a82db8 'C'
/ /
o / 1: 112478962961 'B'
|/
o 0: 426bada5c675 'A'
$ hg manifest --rev tip
A
B
C
E
F
$ cd ..
Test that branchheads cache is updated correctly when doing a strip in which
the parent of the ancestor node to be stripped does not become a head and also,
the parent of a node that is a child of the node stripped becomes a head (node
3). The code is now much simpler and we could just test a simpler scenario
We keep it the test this way in case new complexity is injected.
Create repo b:
$ hg init branch-heads
$ cd branch-heads
$ hg debugdrawdag << 'EOF'
> G
> |\
> | F
> | |
> D E
> |\|
> H C B
> \|/
> A
> EOF
$ hg heads --template="{rev}:{node} {branch}\n"
7:64e264db77f061f16d9132b70c5a58e2461fb630 default
3:575c4b5ec114d64b681d33f8792853568bfb2b2c default
$ cat $TESTTMP/branch-heads/.hg/cache/branch2-served
64e264db77f061f16d9132b70c5a58e2461fb630 7
575c4b5ec114d64b681d33f8792853568bfb2b2c o default
64e264db77f061f16d9132b70c5a58e2461fb630 o default
$ hg strip 4
saved backup bundle to $TESTTMP/branch-heads/.hg/strip-backup/4e4f9194f9f1-5ec4b5e6-backup.hg
$ cat $TESTTMP/branch-heads/.hg/cache/branch2-served
11abe3fb10b8689b560681094b17fe161871d043 5
dc0947a82db884575bb76ea10ac97b08536bfa03 o default
575c4b5ec114d64b681d33f8792853568bfb2b2c o default
11abe3fb10b8689b560681094b17fe161871d043 o default
$ hg heads --template="{rev}:{node} {branch}\n"
5:11abe3fb10b8689b560681094b17fe161871d043 default
3:575c4b5ec114d64b681d33f8792853568bfb2b2c default
2:dc0947a82db884575bb76ea10ac97b08536bfa03 default
$ cd ..
Preserves external parent
$ hg init external-parent
$ cd external-parent
$ hg debugdrawdag << 'EOF'
> H
> |\
> | G
> | |
> | F # F/E = F\n
> | |
> D E # D/D = D\n
> |\|
> I C B
> \|/
> A
> EOF
$ hg rebase -s F --dest I --collapse # root (F) is not a merge
rebasing 6:c82b08f646f1 "F" (F)
rebasing 7:a6db7fa104e1 "G" (G)
rebasing 8:e1d201b72d91 "H" (H tip)
saved backup bundle to $TESTTMP/external-parent/.hg/strip-backup/c82b08f646f1-f2721fbf-rebase.hg
$ hg tglog
o 6: 681daa3e686d 'Collapsed revision
|\ * F
| | * G
| | * H'
| | o 5: 49cb92066bfd 'E'
| | |
| o | 4: 09143c0bf13e 'D'
| |\|
o | | 3: 08ebfeb61bac 'I'
| | |
| o | 2: dc0947a82db8 'C'
|/ /
| o 1: 112478962961 'B'
|/
o 0: 426bada5c675 'A'
$ hg manifest --rev tip
A
C
D
E
F
G
I
$ hg up tip -q
$ cat E
F
$ cd ..
Rebasing from multiple bases:
$ hg init multiple-bases
$ cd multiple-bases
$ hg debugdrawdag << 'EOF'
> C B
> D |/
> |/
> A
> EOF
$ hg rebase --collapse -r 'B+C' -d D
rebasing 1:fc2b737bb2e5 "B" (B)
rebasing 2:dc0947a82db8 "C" (C)
saved backup bundle to $TESTTMP/multiple-bases/.hg/strip-backup/dc0947a82db8-b0c1a7ea-rebase.hg
$ hg tglog
o 2: 2127ae44d291 'Collapsed revision
| * B
| * C'
o 1: b18e25de2cf5 'D'
|
o 0: 426bada5c675 'A'
$ cd ..
With non-contiguous commits:
$ hg init non-contiguous
$ cd non-contiguous
$ cat >> .hg/hgrc <<EOF
> [experimental]
> evolution=all
> EOF
$ hg debugdrawdag << 'EOF'
> F
> |
> E
> |
> D
> |
> C
> |
> B G
> |/
> A
> EOF
BROKEN: should be allowed
$ hg rebase --collapse -r 'B+D+F' -d G
abort: unable to collapse on top of 2, there is more than one external parent: 3, 5
[255]
$ cd ..
$ hg init multiple-external-parents-2
$ cd multiple-external-parents-2
$ hg debugdrawdag << 'EOF'
> D G
> |\ /|
> B C E F
> \| |/
> \ H /
> \|/
> A
> EOF
$ hg rebase --collapse -d H -s 'B+F'
abort: unable to collapse on top of 5, there is more than one external parent: 1, 3
[255]
$ cd ..
With internal merge:
$ hg init internal-merge
$ cd internal-merge
$ hg debugdrawdag << 'EOF'
> E
> |\
> C D
> |/
> F B
> |/
> A
> EOF
$ hg rebase -s B --collapse --dest F
rebasing 1:112478962961 "B" (B)
rebasing 3:26805aba1e60 "C" (C)
rebasing 4:be0ef73c17ad "D" (D)
rebasing 5:02c4367d6973 "E" (E tip)
saved backup bundle to $TESTTMP/internal-merge/.hg/strip-backup/112478962961-1dfb057b-rebase.hg
$ hg tglog
o 2: c0512a1797b0 'Collapsed revision
| * B
| * C
| * D
| * E'
o 1: 8908a377a434 'F'
|
o 0: 426bada5c675 'A'
$ hg manifest --rev tip
A
B
C
D
F
$ cd ..
Interactions between collapse and keepbranches
$ hg init e
$ cd e
$ echo 'a' > a
$ hg ci -Am 'A'
adding a
$ hg branch 'one'
marked working directory as branch one
(branches are permanent and global, did you want a bookmark?)
$ echo 'b' > b
$ hg ci -Am 'B'
adding b
$ hg branch 'two'
marked working directory as branch two
$ echo 'c' > c
$ hg ci -Am 'C'
adding c
$ hg up -q 0
$ echo 'd' > d
$ hg ci -Am 'D'
adding d
$ hg tglog
@ 3: 41acb9dca9eb 'D'
|
| o 2: 8ac4a08debf1 'C' two
| |
| o 1: 1ba175478953 'B' one
|/
o 0: 1994f17a630e 'A'
$ hg rebase --keepbranches --collapse -s 1 -d 3
abort: cannot collapse multiple named branches
[255]
$ repeatchange() {
> hg checkout $1
> hg cp d z
> echo blah >> z
> hg commit -Am "$2" --user "$3"
> }
$ repeatchange 3 "E" "user1"
0 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ repeatchange 3 "E" "user2"
0 files updated, 0 files merged, 1 files removed, 0 files unresolved
created new head
$ hg tglog
@ 5: fbfb97b1089a 'E'
|
| o 4: f338eb3c2c7c 'E'
|/
o 3: 41acb9dca9eb 'D'
|
| o 2: 8ac4a08debf1 'C' two
| |
| o 1: 1ba175478953 'B' one
|/
o 0: 1994f17a630e 'A'
$ hg rebase -s 5 -d 4
rebasing 5:fbfb97b1089a "E" (tip)
note: rebase of 5:fbfb97b1089a created no changes to commit
saved backup bundle to $TESTTMP/e/.hg/strip-backup/fbfb97b1089a-553e1d85-rebase.hg
$ hg tglog
@ 4: f338eb3c2c7c 'E'
|
o 3: 41acb9dca9eb 'D'
|
| o 2: 8ac4a08debf1 'C' two
| |
| o 1: 1ba175478953 'B' one
|/
o 0: 1994f17a630e 'A'
$ hg export tip
# HG changeset patch
# User user1
# Date 0 0
# Thu Jan 01 00:00:00 1970 +0000
# Node ID f338eb3c2c7cc5b5915676a2376ba7ac558c5213
# Parent 41acb9dca9eb976e84cd21fcb756b4afa5a35c09
E
diff -r 41acb9dca9eb -r f338eb3c2c7c z
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/z Thu Jan 01 00:00:00 1970 +0000
@@ -0,0 +1,2 @@
+d
+blah
$ cd ..
Rebase, collapse and copies
$ hg init copies
$ cd copies
$ hg unbundle "$TESTDIR/bundles/renames.hg"
adding changesets
adding manifests
adding file changes
added 4 changesets with 11 changes to 7 files (+1 heads)
new changesets f447d5abf5ea:338e84e2e558 (4 drafts)
(run 'hg heads' to see heads, 'hg merge' to merge)
$ hg up -q tip
$ hg tglog
@ 3: 338e84e2e558 'move2'
|
o 2: 6e7340ee38c0 'move1'
|
| o 1: 1352765a01d4 'change'
|/
o 0: f447d5abf5ea 'add'
$ hg rebase --collapse -d 1
rebasing 2:6e7340ee38c0 "move1"
merging a and d to d
merging b and e to e
merging c and f to f
rebasing 3:338e84e2e558 "move2" (tip)
merging f and c to c
merging e and g to g
saved backup bundle to $TESTTMP/copies/.hg/strip-backup/6e7340ee38c0-ef8ef003-rebase.hg
$ hg st
$ hg st --copies --change tip
A d
a
A g
b
R b
$ hg up tip -q
$ cat c
c
c
$ cat d
a
a
$ cat g
b
b
$ hg log -r . --template "{file_copies}\n"
d (a)g (b)
Test collapsing a middle revision in-place
$ hg tglog
@ 2: 64b456429f67 'Collapsed revision
| * move1
| * move2'
o 1: 1352765a01d4 'change'
|
o 0: f447d5abf5ea 'add'
$ hg rebase --collapse -r 1 -d 0
abort: can't remove original changesets with unrebased descendants
(use --keep to keep original changesets)
[255]
Test collapsing in place
$ hg rebase --collapse -b . -d 0
rebasing 1:1352765a01d4 "change"
rebasing 2:64b456429f67 "Collapsed revision" (tip)
saved backup bundle to $TESTTMP/copies/.hg/strip-backup/1352765a01d4-45a352ea-rebase.hg
$ hg st --change tip --copies
M a
M c
A d
a
A g
b
R b
$ hg up tip -q
$ cat a
a
a
$ cat c
c
c
$ cat d
a
a
$ cat g
b
b
$ cd ..
Test stripping a revision with another child
$ hg init f
$ cd f
$ hg debugdrawdag << 'EOF'
> C B
> |/
> A
> EOF
$ hg heads --template="{rev}:{node} {branch}: {desc}\n"
2:dc0947a82db884575bb76ea10ac97b08536bfa03 default: C
1:112478962961147124edd43549aedd1a335e44bf default: B
$ hg strip C
saved backup bundle to $TESTTMP/f/.hg/strip-backup/dc0947a82db8-d21b92a4-backup.hg
$ hg tglog
o 1: 112478962961 'B'
|
o 0: 426bada5c675 'A'
$ hg heads --template="{rev}:{node} {branch}: {desc}\n"
1:112478962961147124edd43549aedd1a335e44bf default: B
$ cd ..
Test collapsing changes that add then remove a file
$ hg init collapseaddremove
$ cd collapseaddremove
$ touch base
$ hg commit -Am base
adding base
$ touch a
$ hg commit -Am a
adding a
$ hg rm a
$ touch b
$ hg commit -Am b
adding b
$ hg book foo
$ hg rebase -d 0 -r "1::2" --collapse -m collapsed
rebasing 1:6d8d9f24eec3 "a"
rebasing 2:1cc73eca5ecc "b" (foo tip)
saved backup bundle to $TESTTMP/collapseaddremove/.hg/strip-backup/6d8d9f24eec3-77d3b6e2-rebase.hg
$ hg log -G --template "{rev}: '{desc}' {bookmarks}"
@ 1: 'collapsed' foo
|
o 0: 'base'
$ hg manifest --rev tip
b
base
$ cd ..
Test that rebase --collapse will remember message after
running into merge conflict and invoking rebase --continue.
$ hg init collapse_remember_message
$ cd collapse_remember_message
$ hg debugdrawdag << 'EOF'
> C B # B/A = B\n
> |/ # C/A = C\n
> A
> EOF
$ hg rebase --collapse -m "new message" -b B -d C
rebasing 1:81e5401e4d37 "B" (B)
merging A
warning: conflicts while merging A! (edit, then use 'hg resolve --mark')
unresolved conflicts (see hg resolve, then hg rebase --continue)
[1]
$ rm A.orig
$ hg resolve --mark A
(no more unresolved files)
continue: hg rebase --continue
$ hg rebase --continue
rebasing 1:81e5401e4d37 "B" (B)
saved backup bundle to $TESTTMP/collapse_remember_message/.hg/strip-backup/81e5401e4d37-96c3dd30-rebase.hg
$ hg log
changeset: 2:17186933e123
tag: tip
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: new message
changeset: 1:043039e9df84
tag: C
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: C
changeset: 0:426bada5c675
tag: A
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: A
$ cd ..
Test aborted editor on final message
$ HGMERGE=:merge3
$ export HGMERGE
$ hg init aborted-editor
$ cd aborted-editor
$ hg debugdrawdag << 'EOF'
> C # D/A = D\n
> | # C/A = C\n
> B D # B/A = B\n
> |/ # A/A = A\n
> A
> EOF
$ hg rebase --collapse -t internal:merge3 -s B -d D
rebasing 1:f899f3910ce7 "B" (B)
merging A
warning: conflicts while merging A! (edit, then use 'hg resolve --mark')
unresolved conflicts (see hg resolve, then hg rebase --continue)
[1]
$ hg tglog
o 3: 63668d570d21 'C'
|
| @ 2: 82b8abf9c185 'D'
| |
@ | 1: f899f3910ce7 'B'
|/
o 0: 4a2df7238c3b 'A'
$ cat A
<<<<<<< dest: 82b8abf9c185 D - test: D
D
||||||| base
A
=======
B
>>>>>>> source: f899f3910ce7 B - test: B
$ echo BC > A
$ hg resolve -m
(no more unresolved files)
continue: hg rebase --continue
$ hg rebase --continue
rebasing 1:f899f3910ce7 "B" (B)
rebasing 3:63668d570d21 "C" (C tip)
merging A
warning: conflicts while merging A! (edit, then use 'hg resolve --mark')
unresolved conflicts (see hg resolve, then hg rebase --continue)
[1]
$ hg tglog
@ 3: 63668d570d21 'C'
|
| @ 2: 82b8abf9c185 'D'
| |
o | 1: f899f3910ce7 'B'
|/
o 0: 4a2df7238c3b 'A'
$ cat A
<<<<<<< dest: 82b8abf9c185 D - test: D
BC
||||||| base
B
=======
C
>>>>>>> source: 63668d570d21 C tip - test: C
$ echo BD > A
$ hg resolve -m
(no more unresolved files)
continue: hg rebase --continue
$ HGEDITOR=false hg rebase --continue --config ui.interactive=1
already rebased 1:f899f3910ce7 "B" (B) as 82b8abf9c185
rebasing 3:63668d570d21 "C" (C tip)
abort: edit failed: false exited with status 1
[255]
$ hg tglog
o 3: 63668d570d21 'C'
|
| @ 2: 82b8abf9c185 'D'
| |
o | 1: f899f3910ce7 'B'
|/
o 0: 4a2df7238c3b 'A'
$ hg rebase --continue
already rebased 1:f899f3910ce7 "B" (B) as 82b8abf9c185
already rebased 3:63668d570d21 "C" (C tip) as 82b8abf9c185
saved backup bundle to $TESTTMP/aborted-editor/.hg/strip-backup/f899f3910ce7-7cab5e15-rebase.hg