debugextensions: show ships-with-hg-core state as a separate field
This is less magical than rephrasing ships-with-hg-core as internal, and
we can distinguish "internal" liar. "tested with: internal" will be hidden
by the next patch.
$ cat >> $HGRCPATH <<EOF
> [extdiff]
> # for portability:
> pdiff = sh "$RUNTESTDIR/pdiff"
> EOF
Create a repo with some stuff in it:
$ hg init a
$ cd a
$ echo a > a
$ echo a > d
$ echo a > e
$ hg ci -qAm0
$ echo b > a
$ hg ci -m1 -u bar
$ hg mv a b
$ hg ci -m2
$ hg cp b c
$ hg ci -m3 -u baz
$ echo b > d
$ echo f > e
$ hg ci -m4
$ hg up -q 3
$ echo b > e
$ hg branch -q stable
$ hg ci -m5
$ hg merge -q default --tool internal:local
$ hg branch -q default
$ hg ci -m6
$ hg phase --public 3
$ hg phase --force --secret 6
$ hg log -G --template '{author}@{rev}.{phase}: {desc}\n'
@ test@6.secret: 6
|\
| o test@5.draft: 5
| |
o | test@4.draft: 4
|/
o baz@3.public: 3
|
o test@2.public: 2
|
o bar@1.public: 1
|
o test@0.public: 0
Can't continue without starting:
$ hg rm -q e
$ hg graft --continue
abort: no graft in progress
[255]
$ hg revert -r . -q e
Need to specify a rev:
$ hg graft
abort: no revisions specified
[255]
Can't graft ancestor:
$ hg graft 1 2
skipping ancestor revision 1:5d205f8b35b6
skipping ancestor revision 2:5c095ad7e90f
[255]
Specify revisions with -r:
$ hg graft -r 1 -r 2
skipping ancestor revision 1:5d205f8b35b6
skipping ancestor revision 2:5c095ad7e90f
[255]
$ hg graft -r 1 2
warning: inconsistent use of --rev might give unexpected revision ordering!
skipping ancestor revision 2:5c095ad7e90f
skipping ancestor revision 1:5d205f8b35b6
[255]
Can't graft with dirty wd:
$ hg up -q 0
$ echo foo > a
$ hg graft 1
abort: uncommitted changes
[255]
$ hg revert a
Graft a rename:
(this also tests that editor is invoked if '--edit' is specified)
$ hg status --rev "2^1" --rev 2
A b
R a
$ HGEDITOR=cat hg graft 2 -u foo --edit
grafting 2:5c095ad7e90f "2"
merging a and b to b
2
HG: Enter commit message. Lines beginning with 'HG:' are removed.
HG: Leave message empty to abort commit.
HG: --
HG: user: foo
HG: branch 'default'
HG: added b
HG: removed a
$ hg export tip --git
# HG changeset patch
# User foo
# Date 0 0
# Thu Jan 01 00:00:00 1970 +0000
# Node ID ef0ef43d49e79e81ddafdc7997401ba0041efc82
# Parent 68795b066622ca79a25816a662041d8f78f3cd9e
2
diff --git a/a b/b
rename from a
rename to b
Look for extra:source
$ hg log --debug -r tip
changeset: 7:ef0ef43d49e79e81ddafdc7997401ba0041efc82
tag: tip
phase: draft
parent: 0:68795b066622ca79a25816a662041d8f78f3cd9e
parent: -1:0000000000000000000000000000000000000000
manifest: 7:e59b6b228f9cbf9903d5e9abf996e083a1f533eb
user: foo
date: Thu Jan 01 00:00:00 1970 +0000
files+: b
files-: a
extra: branch=default
extra: source=5c095ad7e90f871700f02dd1fa5012cb4498a2d4
description:
2
Graft out of order, skipping a merge and a duplicate
(this also tests that editor is not invoked if '--edit' is not specified)
$ hg graft 1 5 4 3 'merge()' 2 -n
skipping ungraftable merge revision 6
skipping revision 2:5c095ad7e90f (already grafted to 7:ef0ef43d49e7)
grafting 1:5d205f8b35b6 "1"
grafting 5:97f8bfe72746 "5"
grafting 4:9c233e8e184d "4"
grafting 3:4c60f11aa304 "3"
$ HGEDITOR=cat hg graft 1 5 'merge()' 2 --debug
skipping ungraftable merge revision 6
scanning for duplicate grafts
skipping revision 2:5c095ad7e90f (already grafted to 7:ef0ef43d49e7)
grafting 1:5d205f8b35b6 "1"
searching for copies back to rev 1
unmatched files in local:
b
all copies found (* = to merge, ! = divergent, % = renamed and deleted):
src: 'a' -> dst: 'b' *
checking for directory renames
resolving manifests
branchmerge: True, force: True, partial: False
ancestor: 68795b066622, local: ef0ef43d49e7+, remote: 5d205f8b35b6
preserving b for resolve of b
starting 4 threads for background file closing (?)
b: local copied/moved from a -> m (premerge)
picked tool ':merge' for b (binary False symlink False changedelete False)
merging b and a to b
my b@ef0ef43d49e7+ other a@5d205f8b35b6 ancestor a@68795b066622
premerge successful
committing files:
b
committing manifest
committing changelog
grafting 5:97f8bfe72746 "5"
searching for copies back to rev 1
resolving manifests
branchmerge: True, force: True, partial: False
ancestor: 4c60f11aa304, local: 6b9e5368ca4e+, remote: 97f8bfe72746
e: remote is newer -> g
getting e
b: remote unchanged -> k
committing files:
e
committing manifest
committing changelog
$ HGEDITOR=cat hg graft 4 3 --log --debug
scanning for duplicate grafts
grafting 4:9c233e8e184d "4"
searching for copies back to rev 1
resolving manifests
branchmerge: True, force: True, partial: False
ancestor: 4c60f11aa304, local: 1905859650ec+, remote: 9c233e8e184d
preserving e for resolve of e
d: remote is newer -> g
getting d
b: remote unchanged -> k
e: versions differ -> m (premerge)
picked tool ':merge' for e (binary False symlink False changedelete False)
merging e
my e@1905859650ec+ other e@9c233e8e184d ancestor e@4c60f11aa304
e: versions differ -> m (merge)
picked tool ':merge' for e (binary False symlink False changedelete False)
my e@1905859650ec+ other e@9c233e8e184d ancestor e@4c60f11aa304
warning: conflicts while merging e! (edit, then use 'hg resolve --mark')
abort: unresolved conflicts, can't continue
(use 'hg resolve' and 'hg graft --continue --log')
[255]
Summary should mention graft:
$ hg summary |grep graft
commit: 2 modified, 2 unknown, 1 unresolved (graft in progress)
Commit while interrupted should fail:
$ hg ci -m 'commit interrupted graft'
abort: graft in progress
(use 'hg graft --continue' or 'hg update' to abort)
[255]
Abort the graft and try committing:
$ hg up -C .
2 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ echo c >> e
$ hg ci -mtest
$ hg strip . --config extensions.strip=
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
saved backup bundle to $TESTTMP/a/.hg/strip-backup/*-backup.hg (glob)
Graft again:
$ hg graft 1 5 4 3 'merge()' 2
skipping ungraftable merge revision 6
skipping revision 2:5c095ad7e90f (already grafted to 7:ef0ef43d49e7)
skipping revision 1:5d205f8b35b6 (already grafted to 8:6b9e5368ca4e)
skipping revision 5:97f8bfe72746 (already grafted to 9:1905859650ec)
grafting 4:9c233e8e184d "4"
merging e
warning: conflicts while merging e! (edit, then use 'hg resolve --mark')
abort: unresolved conflicts, can't continue
(use 'hg resolve' and 'hg graft --continue')
[255]
Continue without resolve should fail:
$ hg graft -c
grafting 4:9c233e8e184d "4"
abort: unresolved merge conflicts (see "hg help resolve")
[255]
Fix up:
$ echo b > e
$ hg resolve -m e
(no more unresolved files)
continue: hg graft --continue
Continue with a revision should fail:
$ hg graft -c 6
abort: can't specify --continue and revisions
[255]
$ hg graft -c -r 6
abort: can't specify --continue and revisions
[255]
Continue for real, clobber usernames
$ hg graft -c -U
grafting 4:9c233e8e184d "4"
grafting 3:4c60f11aa304 "3"
Compare with original:
$ hg diff -r 6
$ hg status --rev 0:. -C
M d
M e
A b
a
A c
a
R a
View graph:
$ hg log -G --template '{author}@{rev}.{phase}: {desc}\n'
@ test@11.draft: 3
|
o test@10.draft: 4
|
o test@9.draft: 5
|
o bar@8.draft: 1
|
o foo@7.draft: 2
|
| o test@6.secret: 6
| |\
| | o test@5.draft: 5
| | |
| o | test@4.draft: 4
| |/
| o baz@3.public: 3
| |
| o test@2.public: 2
| |
| o bar@1.public: 1
|/
o test@0.public: 0
Graft again onto another branch should preserve the original source
$ hg up -q 0
$ echo 'g'>g
$ hg add g
$ hg ci -m 7
created new head
$ hg graft 7
grafting 7:ef0ef43d49e7 "2"
$ hg log -r 7 --template '{rev}:{node}\n'
7:ef0ef43d49e79e81ddafdc7997401ba0041efc82
$ hg log -r 2 --template '{rev}:{node}\n'
2:5c095ad7e90f871700f02dd1fa5012cb4498a2d4
$ hg log --debug -r tip
changeset: 13:7a4785234d87ec1aa420ed6b11afe40fa73e12a9
tag: tip
phase: draft
parent: 12:b592ea63bb0c19a6c5c44685ee29a2284f9f1b8f
parent: -1:0000000000000000000000000000000000000000
manifest: 13:dc313617b8c32457c0d589e0dbbedfe71f3cd637
user: foo
date: Thu Jan 01 00:00:00 1970 +0000
files+: b
files-: a
extra: branch=default
extra: intermediate-source=ef0ef43d49e79e81ddafdc7997401ba0041efc82
extra: source=5c095ad7e90f871700f02dd1fa5012cb4498a2d4
description:
2
Disallow grafting an already grafted cset onto its original branch
$ hg up -q 6
$ hg graft 7
skipping already grafted revision 7:ef0ef43d49e7 (was grafted from 2:5c095ad7e90f)
[255]
$ hg pdiff --config extensions.extdiff= --patch -r 2 -r 13
--- */hg-5c095ad7e90f.patch * (glob)
+++ */hg-7a4785234d87.patch * (glob)
@@ -1,18 +1,18 @@
# HG changeset patch
-# User test
+# User foo
# Date 0 0
# Thu Jan 01 00:00:00 1970 +0000
-# Node ID 5c095ad7e90f871700f02dd1fa5012cb4498a2d4
-# Parent 5d205f8b35b66bc36375c9534ffd3237730e8f04
+# Node ID 7a4785234d87ec1aa420ed6b11afe40fa73e12a9
+# Parent b592ea63bb0c19a6c5c44685ee29a2284f9f1b8f
2
-diff -r 5d205f8b35b6 -r 5c095ad7e90f a
+diff -r b592ea63bb0c -r 7a4785234d87 a
--- a/a Thu Jan 01 00:00:00 1970 +0000
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,1 +0,0 @@
--b
-diff -r 5d205f8b35b6 -r 5c095ad7e90f b
+-a
+diff -r b592ea63bb0c -r 7a4785234d87 b
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/b Thu Jan 01 00:00:00 1970 +0000
@@ -0,0 +1,1 @@
-+b
++a
[1]
$ hg pdiff --config extensions.extdiff= --patch -r 2 -r 13 -X .
--- */hg-5c095ad7e90f.patch * (glob)
+++ */hg-7a4785234d87.patch * (glob)
@@ -1,8 +1,8 @@
# HG changeset patch
-# User test
+# User foo
# Date 0 0
# Thu Jan 01 00:00:00 1970 +0000
-# Node ID 5c095ad7e90f871700f02dd1fa5012cb4498a2d4
-# Parent 5d205f8b35b66bc36375c9534ffd3237730e8f04
+# Node ID 7a4785234d87ec1aa420ed6b11afe40fa73e12a9
+# Parent b592ea63bb0c19a6c5c44685ee29a2284f9f1b8f
2
[1]
Disallow grafting already grafted csets with the same origin onto each other
$ hg up -q 13
$ hg graft 2
skipping revision 2:5c095ad7e90f (already grafted to 13:7a4785234d87)
[255]
$ hg graft 7
skipping already grafted revision 7:ef0ef43d49e7 (13:7a4785234d87 also has origin 2:5c095ad7e90f)
[255]
$ hg up -q 7
$ hg graft 2
skipping revision 2:5c095ad7e90f (already grafted to 7:ef0ef43d49e7)
[255]
$ hg graft tip
skipping already grafted revision 13:7a4785234d87 (7:ef0ef43d49e7 also has origin 2:5c095ad7e90f)
[255]
Graft with --log
$ hg up -Cq 1
$ hg graft 3 --log -u foo
grafting 3:4c60f11aa304 "3"
warning: can't find ancestor for 'c' copied from 'b'!
$ hg log --template '{rev} {parents} {desc}\n' -r tip
14 1:5d205f8b35b6 3
(grafted from 4c60f11aa304a54ae1c199feb94e7fc771e51ed8)
Resolve conflicted graft
$ hg up -q 0
$ echo b > a
$ hg ci -m 8
created new head
$ echo c > a
$ hg ci -m 9
$ hg graft 1 --tool internal:fail
grafting 1:5d205f8b35b6 "1"
abort: unresolved conflicts, can't continue
(use 'hg resolve' and 'hg graft --continue')
[255]
$ hg resolve --all
merging a
warning: conflicts while merging a! (edit, then use 'hg resolve --mark')
[1]
$ cat a
<<<<<<< local: aaa4406d4f0a - test: 9
c
=======
b
>>>>>>> graft: 5d205f8b35b6 - bar: 1
$ echo b > a
$ hg resolve -m a
(no more unresolved files)
continue: hg graft --continue
$ hg graft -c
grafting 1:5d205f8b35b6 "1"
$ hg export tip --git
# HG changeset patch
# User bar
# Date 0 0
# Thu Jan 01 00:00:00 1970 +0000
# Node ID f67661df0c4804d301f064f332b57e7d5ddaf2be
# Parent aaa4406d4f0ae9befd6e58c82ec63706460cbca6
1
diff --git a/a b/a
--- a/a
+++ b/a
@@ -1,1 +1,1 @@
-c
+b
Resolve conflicted graft with rename
$ echo c > a
$ hg ci -m 10
$ hg graft 2 --tool internal:fail
grafting 2:5c095ad7e90f "2"
abort: unresolved conflicts, can't continue
(use 'hg resolve' and 'hg graft --continue')
[255]
$ hg resolve --all
merging a and b to b
(no more unresolved files)
continue: hg graft --continue
$ hg graft -c
grafting 2:5c095ad7e90f "2"
$ hg export tip --git
# HG changeset patch
# User test
# Date 0 0
# Thu Jan 01 00:00:00 1970 +0000
# Node ID 9627f653b421c61fc1ea4c4e366745070fa3d2bc
# Parent ee295f490a40b97f3d18dd4c4f1c8936c233b612
2
diff --git a/a b/b
rename from a
rename to b
Test simple origin(), with and without args
$ hg log -r 'origin()'
changeset: 1:5d205f8b35b6
user: bar
date: Thu Jan 01 00:00:00 1970 +0000
summary: 1
changeset: 2:5c095ad7e90f
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: 2
changeset: 3:4c60f11aa304
user: baz
date: Thu Jan 01 00:00:00 1970 +0000
summary: 3
changeset: 4:9c233e8e184d
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: 4
changeset: 5:97f8bfe72746
branch: stable
parent: 3:4c60f11aa304
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: 5
$ hg log -r 'origin(7)'
changeset: 2:5c095ad7e90f
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: 2
Now transplant a graft to test following through copies
$ hg up -q 0
$ hg branch -q dev
$ hg ci -qm "dev branch"
$ hg --config extensions.transplant= transplant -q 7
$ hg log -r 'origin(.)'
changeset: 2:5c095ad7e90f
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: 2
Test that the graft and transplant markers in extra are converted, allowing
origin() to still work. Note that these recheck the immediately preceeding two
tests.
$ hg --quiet --config extensions.convert= --config convert.hg.saverev=True convert . ../converted
The graft case
$ hg -R ../converted log -r 7 --template "{rev}: {node}\n{join(extras, '\n')}\n"
7: 7ae846e9111fc8f57745634250c7b9ac0a60689b
branch=default
convert_revision=ef0ef43d49e79e81ddafdc7997401ba0041efc82
source=e0213322b2c1a5d5d236c74e79666441bee67a7d
$ hg -R ../converted log -r 'origin(7)'
changeset: 2:e0213322b2c1
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: 2
Test that template correctly expands more than one 'extra' (issue4362), and that
'intermediate-source' is converted.
$ hg -R ../converted log -r 13 --template "{extras % ' Extra: {extra}\n'}"
Extra: branch=default
Extra: convert_revision=7a4785234d87ec1aa420ed6b11afe40fa73e12a9
Extra: intermediate-source=7ae846e9111fc8f57745634250c7b9ac0a60689b
Extra: source=e0213322b2c1a5d5d236c74e79666441bee67a7d
The transplant case
$ hg -R ../converted log -r tip --template "{rev}: {node}\n{join(extras, '\n')}\n"
21: fbb6c5cc81002f2b4b49c9d731404688bcae5ade
branch=dev
convert_revision=7e61b508e709a11d28194a5359bc3532d910af21
transplant_source=z\xe8F\xe9\x11\x1f\xc8\xf5wEcBP\xc7\xb9\xac (esc)
`h\x9b (esc)
$ hg -R ../converted log -r 'origin(tip)'
changeset: 2:e0213322b2c1
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: 2
Test simple destination
$ hg log -r 'destination()'
changeset: 7:ef0ef43d49e7
parent: 0:68795b066622
user: foo
date: Thu Jan 01 00:00:00 1970 +0000
summary: 2
changeset: 8:6b9e5368ca4e
user: bar
date: Thu Jan 01 00:00:00 1970 +0000
summary: 1
changeset: 9:1905859650ec
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: 5
changeset: 10:52dc0b4c6907
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: 4
changeset: 11:882b35362a6b
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: 3
changeset: 13:7a4785234d87
user: foo
date: Thu Jan 01 00:00:00 1970 +0000
summary: 2
changeset: 14:f64defefacee
parent: 1:5d205f8b35b6
user: foo
date: Thu Jan 01 00:00:00 1970 +0000
summary: 3
changeset: 17:f67661df0c48
user: bar
date: Thu Jan 01 00:00:00 1970 +0000
summary: 1
changeset: 19:9627f653b421
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: 2
changeset: 21:7e61b508e709
branch: dev
tag: tip
user: foo
date: Thu Jan 01 00:00:00 1970 +0000
summary: 2
$ hg log -r 'destination(2)'
changeset: 7:ef0ef43d49e7
parent: 0:68795b066622
user: foo
date: Thu Jan 01 00:00:00 1970 +0000
summary: 2
changeset: 13:7a4785234d87
user: foo
date: Thu Jan 01 00:00:00 1970 +0000
summary: 2
changeset: 19:9627f653b421
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: 2
changeset: 21:7e61b508e709
branch: dev
tag: tip
user: foo
date: Thu Jan 01 00:00:00 1970 +0000
summary: 2
Transplants of grafts can find a destination...
$ hg log -r 'destination(7)'
changeset: 21:7e61b508e709
branch: dev
tag: tip
user: foo
date: Thu Jan 01 00:00:00 1970 +0000
summary: 2
... grafts of grafts unfortunately can't
$ hg graft -q 13
warning: can't find ancestor for 'b' copied from 'a'!
$ hg log -r 'destination(13)'
All copies of a cset
$ hg log -r 'origin(13) or destination(origin(13))'
changeset: 2:5c095ad7e90f
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: 2
changeset: 7:ef0ef43d49e7
parent: 0:68795b066622
user: foo
date: Thu Jan 01 00:00:00 1970 +0000
summary: 2
changeset: 13:7a4785234d87
user: foo
date: Thu Jan 01 00:00:00 1970 +0000
summary: 2
changeset: 19:9627f653b421
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: 2
changeset: 21:7e61b508e709
branch: dev
user: foo
date: Thu Jan 01 00:00:00 1970 +0000
summary: 2
changeset: 22:d1cb6591fa4b
branch: dev
tag: tip
user: foo
date: Thu Jan 01 00:00:00 1970 +0000
summary: 2
graft works on complex revset
$ hg graft 'origin(13) or destination(origin(13))'
skipping ancestor revision 21:7e61b508e709
skipping ancestor revision 22:d1cb6591fa4b
skipping revision 2:5c095ad7e90f (already grafted to 22:d1cb6591fa4b)
grafting 7:ef0ef43d49e7 "2"
warning: can't find ancestor for 'b' copied from 'a'!
grafting 13:7a4785234d87 "2"
warning: can't find ancestor for 'b' copied from 'a'!
grafting 19:9627f653b421 "2"
merging b
warning: can't find ancestor for 'b' copied from 'a'!
graft with --force (still doesn't graft merges)
$ hg graft 19 0 6
skipping ungraftable merge revision 6
skipping ancestor revision 0:68795b066622
skipping already grafted revision 19:9627f653b421 (22:d1cb6591fa4b also has origin 2:5c095ad7e90f)
[255]
$ hg graft 19 0 6 --force
skipping ungraftable merge revision 6
grafting 19:9627f653b421 "2"
merging b
warning: can't find ancestor for 'b' copied from 'a'!
grafting 0:68795b066622 "0"
graft --force after backout
$ echo abc > a
$ hg ci -m 28
$ hg backout 28
reverting a
changeset 29:53177ba928f6 backs out changeset 28:50a516bb8b57
$ hg graft 28
skipping ancestor revision 28:50a516bb8b57
[255]
$ hg graft 28 --force
grafting 28:50a516bb8b57 "28"
merging a
$ cat a
abc
graft --continue after --force
$ echo def > a
$ hg ci -m 31
$ hg graft 28 --force --tool internal:fail
grafting 28:50a516bb8b57 "28"
abort: unresolved conflicts, can't continue
(use 'hg resolve' and 'hg graft --continue')
[255]
$ hg resolve --all
merging a
warning: conflicts while merging a! (edit, then use 'hg resolve --mark')
[1]
$ echo abc > a
$ hg resolve -m a
(no more unresolved files)
continue: hg graft --continue
$ hg graft -c
grafting 28:50a516bb8b57 "28"
$ cat a
abc
Continue testing same origin policy, using revision numbers from test above
but do some destructive editing of the repo:
$ hg up -qC 7
$ hg tag -l -r 13 tmp
$ hg --config extensions.strip= strip 2
saved backup bundle to $TESTTMP/a/.hg/strip-backup/5c095ad7e90f-d323a1e4-backup.hg (glob)
$ hg graft tmp
skipping already grafted revision 8:7a4785234d87 (2:ef0ef43d49e7 also has unknown origin 5c095ad7e90f)
[255]
Empty graft
$ hg up -qr 26
$ hg tag -f something
$ hg graft -qr 27
$ hg graft -f 27
grafting 27:ed6c7e54e319 "28"
note: graft of 27:ed6c7e54e319 created no changes to commit
$ cd ..
Graft to duplicate a commit
$ hg init graftsibling
$ cd graftsibling
$ touch a
$ hg commit -qAm a
$ touch b
$ hg commit -qAm b
$ hg log -G -T '{rev}\n'
@ 1
|
o 0
$ hg up -q 0
$ hg graft -r 1
grafting 1:0e067c57feba "b" (tip)
$ hg log -G -T '{rev}\n'
@ 2
|
| o 1
|/
o 0
Graft to duplicate a commit twice
$ hg up -q 0
$ hg graft -r 2
grafting 2:044ec77f6389 "b" (tip)
$ hg log -G -T '{rev}\n'
@ 3
|
| o 2
|/
| o 1
|/
o 0