annotate tests/test-glog.t @ 51977:42a116f1cdc1

branchmap-v3: introduce a "stop_rev" argument to `headsrevs`

The `headsrevs` method of the revlog already have a `revs` argument to compute
the headrevs of a limited set of heads. However, it disable the use of the
native compiled code to compute the heads, which slows down the branchmap v3
code a lot.

The branchmap v3 usage is actually quite constrained as we will always only
ignores a part at the top of the graph. So we could be significantly faster.

We start by making small change to the python side to improve the situation and
introduce the new API. More collaboration with the native code are coming later.

This massively speedup operation and close most of the remaining gaps between
branchmap-v3 and branchmap-v2. especially on repository with many revs like
mozilla-try. A small overhead remains mostly because the `headrevs` logic
currently has some inefficiently. We will look into them from there.

### benchmark.name                                 = hg.command.unbundle
  # bin-env-vars.hg.py-re2-module                  = default
  # benchmark.variants.issue6528                   = disabled
  # benchmark.variants.resource-usage              = default
  # benchmark.variants.reuse-external-delta-parent = yes
  # benchmark.variants.revs                        = any-1-extra-rev
  # benchmark.variants.source                      = unbundle
  # benchmark.variants.validate                    = default
  # benchmark.variants.verbosity                   = quiet

 ## data-env-vars.name                             = netbeans-2018-08-01-zstd-sparse-revlog
  # bin-env-vars.hg.flavor                         = default
branch-v2:        0.233711  ~~~~~
branch-v3 before: 0.368769  (+57.79%, +0.14)
branch-v3 after:  0.239857   (+2.63%, +0.01)
  # bin-env-vars.hg.flavor                         = rust
branch-v2:        0.235230  ~~~~~
branch-v3 before: 0.372460  (+58.34%, +0.14)
branch-v3 after:  0.240972   (+2.44%, +0.01)
 ## data-env-vars.name                             = netbeans-2018-08-01-ds2-pnm
  # bin-env-vars.hg.flavor                         = rust
branch-v2:        0.255586  ~~~~~
branch-v3 before: 0.318907  (+24.78%, +0.06)
branch-v3 after:  0.268560   (+5.08%, +0.01)

 ## data-env-vars.name                             = mozilla-central-2024-03-22-zstd-sparse-revlog
  # bin-env-vars.hg.flavor                         = default
branch-v2:        0.339010  ~~~~~
branch-v3 before: 0.349752   (+3.17%, +0.01)
branch-v3 after:  0.349389   (+3.06%, +0.01)
  # bin-env-vars.hg.flavor                         = rust
branch-v2:        0.346525  ~~~~~
branch-v3 before: 0.354300   (+2.24%, +0.01)
branch-v3 after:  0.355661   (+2.64%, +0.01)
 ## data-env-vars.name                             = mozilla-central-2024-03-22-ds2-pnm
  # bin-env-vars.hg.flavor                         = rust
branch-v2:        0.380202  ~~~~~
branch-v3 before: 0.396293   (+4.23%, +0.02)
branch-v3 after:  0.408851   (+7.54%, +0.03)

 ## data-env-vars.name                             = mozilla-unified-2024-03-22-zstd-sparse-revlog
  # bin-env-vars.hg.flavor                         = default
branch-v2:        0.412165  ~~~~~
branch-v3 before: 0.424769   (+3.06%, +0.01)
branch-v3 after:  0.427782   (+3.79%, +0.02)
  # bin-env-vars.hg.flavor                         = rust
branch-v2:        0.412397  ~~~~~
branch-v3 before: 0.421796   (+2.28%, +0.01)
branch-v3 after:  0.422354   (+2.41%, +0.01)
 ## data-env-vars.name                             = mozilla-unified-2024-03-22-ds2-pnm
  # bin-env-vars.hg.flavor                         = rust
branch-v2:        0.429501  ~~~~~
branch-v3 before: 0.443849   (+3.34%, +0.01)
branch-v3 after:  0.443197   (+3.19%, +0.01)

 ## data-env-vars.name                             = mozilla-try-2024-03-26-zstd-sparse-revlog
  # bin-env-vars.hg.flavor                         = default
branch-v2:        3.403171  ~~~~~
branch-v3 before: 6.234055  (+83.18%, +2.83)
branch-v3 after:  3.819477  (+12.23%, +0.42)
  # bin-env-vars.hg.flavor                         = rust
branch-v2:        3.454876  ~~~~~
branch-v3 before: 6.307813  (+82.58%, +2.85)
branch-v3 after:  3.590284   (+3.92%, +0.14)
 ## data-env-vars.name                             = mozilla-try-2024-03-26-ds2-pnm
  # bin-env-vars.hg.flavor                         = rust
branch-v2:        3.465435  ~~~~~
branch-v3 before: 5.176076  (+49.36%, +1.71)
branch-v3 after:  3.633278   (+4.84%, +0.17)

@  (34) head
|
| o  (33) head
| |
o |    (32) expand
|\ \
| o \    (31) expand
| |\ \
| | o \    (30) expand
| | |\ \
| | | o |  (29) regular commit
| | | | |
| | o | |    (28) merge zero known
| | |\ \ \
o | | | | |  (27) collapse
|/ / / / /
| | o---+  (26) merge one known; far right
| | | | |
+---o | |  (25) merge one known; far left
| | | | |
| | o | |  (24) merge one known; immediate right
| | |\| |
| | o | |  (23) merge one known; immediate left
| |/| | |
+---o---+  (22) merge two known; one far left, one far right
| |  / /
o | | |    (21) expand
|\ \ \ \
| o---+-+  (20) merge two known; two far right
|  / / /
o | | |    (19) expand
|\ \ \ \
+---+---o  (18) merge two known; two far left
| | | |
| o | |    (17) expand
| |\ \ \
| | o---+  (16) merge two known; one immediate right, one near right
| | |/ /
o | | |    (15) expand
|\ \ \ \
| o-----+  (14) merge two known; one immediate right, one far right
| |/ / /
o | | |    (13) expand
|\ \ \ \
+---o | |  (12) merge two known; one immediate right, one far left
| | |/ /
| o | |    (11) expand
| |\ \ \
| | o---+  (10) merge two known; one immediate left, one near right
| |/ / /
o | | |    (9) expand
|\ \ \ \
| o-----+  (8) merge two known; one immediate left, one far right
|/ / / /
o | | |    (7) expand
|\ \ \ \
+---o | |  (6) merge two known; one immediate left, one far left
| |/ / /
| o | |    (5) expand
| |\ \ \
| | o | |  (4) merge two known; one immediate left, one immediate right
| |/|/ /
| o / /  (3) collapse
|/ / /
o / /  (2) collapse
|/ /
o /  (1) collapse
|/
o  (0) root


  $ commit()
  > {
  >   rev=$1
  >   msg=$2
  >   shift 2
  >   if [ "$#" -gt 0 ]; then
  >       hg debugsetparents "$@"
  >   fi
  >   echo $rev > a
  >   hg commit -Aqd "$rev 0" -m "($rev) $msg"
  > }

  $ echo "[extensions]" >> $HGRCPATH
  $ echo "printrevset=$TESTDIR/printrevset.py" >> $HGRCPATH

  $ hg init repo
  $ cd repo

Empty repo:

  $ hg log -G


Building DAG:

  $ commit 0 "root"
  $ commit 1 "collapse" 0
  $ commit 2 "collapse" 1
  $ commit 3 "collapse" 2
  $ commit 4 "merge two known; one immediate left, one immediate right" 1 3
  $ commit 5 "expand" 3 4
  $ commit 6 "merge two known; one immediate left, one far left" 2 5
  $ commit 7 "expand" 2 5
  $ commit 8 "merge two known; one immediate left, one far right" 0 7
  $ commit 9 "expand" 7 8
  $ commit 10 "merge two known; one immediate left, one near right" 0 6
  $ commit 11 "expand" 6 10
  $ commit 12 "merge two known; one immediate right, one far left" 1 9
  $ commit 13 "expand" 9 11
  $ commit 14 "merge two known; one immediate right, one far right" 0 12
  $ commit 15 "expand" 13 14
  $ commit 16 "merge two known; one immediate right, one near right" 0 1
  $ commit 17 "expand" 12 16
  $ commit 18 "merge two known; two far left" 1 15
  $ commit 19 "expand" 15 17
  $ commit 20 "merge two known; two far right" 0 18
  $ commit 21 "expand" 19 20
  $ commit 22 "merge two known; one far left, one far right" 18 21
  $ commit 23 "merge one known; immediate left" 1 22
  $ commit 24 "merge one known; immediate right" 0 23
  $ commit 25 "merge one known; far left" 21 24
  $ commit 26 "merge one known; far right" 18 25
  $ commit 27 "collapse" 21
  $ commit 28 "merge zero known" 1 26
  $ commit 29 "regular commit" 0
  $ commit 30 "expand" 28 29
  $ commit 31 "expand" 21 30
  $ commit 32 "expand" 27 31
  $ commit 33 "head" 18
  $ commit 34 "head" 32


  $ hg log -G -q
  @  34:fea3ac5810e0
  |
  | o  33:68608f5145f9
  | |
  o |    32:d06dffa21a31
  |\ \
  | o \    31:621d83e11f67
  | |\ \
  | | o \    30:6e11cd4b648f
  | | |\ \
  | | | o |  29:cd9bb2be7593
  | | | | |
  | | o | |    28:44ecd0b9ae99
  | | |\ \ \
  o | | | | |  27:886ed638191b
  |/ / / / /
  | | o---+  26:7f25b6c2f0b9
  | | | | |
  +---o | |  25:91da8ed57247
  | | | | |
  | | o | |  24:a9c19a3d96b7
  | | |\| |
  | | o | |  23:a01cddf0766d
  | |/| | |
  +---o---+  22:e0d9cccacb5d
  | |  / /
  o | | |    21:d42a756af44d
  |\ \ \ \
  | o---+-+  20:d30ed6450e32
  |  / / /
  o | | |    19:31ddc2c1573b
  |\ \ \ \
  +---+---o  18:1aa84d96232a
  | | | |
  | o | |    17:44765d7c06e0
  | |\ \ \
  | | o---+  16:3677d192927d
  | | |/ /
  o | | |    15:1dda3f72782d
  |\ \ \ \
  | o-----+  14:8eac370358ef
  | |/ / /
  o | | |    13:22d8966a97e3
  |\ \ \ \
  +---o | |  12:86b91144a6e9
  | | |/ /
  | o | |    11:832d76e6bdf2
  | |\ \ \
  | | o---+  10:74c64d036d72
  | |/ / /
  o | | |    9:7010c0af0a35
  |\ \ \ \
  | o-----+  8:7a0b11f71937
  |/ / / /
  o | | |    7:b632bb1b1224
  |\ \ \ \
  +---o | |  6:b105a072e251
  | |/ / /
  | o | |    5:4409d547b708
  | |\ \ \
  | | o | |  4:26a8bac39d9f
  | |/|/ /
  | o / /  3:27eef8ed80b4
  |/ / /
  o / /  2:3d9a33b8d1e1
  |/ /
  o /  1:6db2ef61d156
  |/
  o  0:e6eb3150255d
  

  $ hg log -G
  @  changeset:   34:fea3ac5810e0
  |  tag:         tip
  |  parent:      32:d06dffa21a31
  |  user:        test
  |  date:        Thu Jan 01 00:00:34 1970 +0000
  |  summary:     (34) head
  |
  | o  changeset:   33:68608f5145f9
  | |  parent:      18:1aa84d96232a
  | |  user:        test
  | |  date:        Thu Jan 01 00:00:33 1970 +0000
  | |  summary:     (33) head
  | |
  o |    changeset:   32:d06dffa21a31
  |\ \   parent:      27:886ed638191b
  | | |  parent:      31:621d83e11f67
  | | |  user:        test
  | | |  date:        Thu Jan 01 00:00:32 1970 +0000
  | | |  summary:     (32) expand
  | | |
  | o |    changeset:   31:621d83e11f67
  | |\ \   parent:      21:d42a756af44d
  | | | |  parent:      30:6e11cd4b648f
  | | | |  user:        test
  | | | |  date:        Thu Jan 01 00:00:31 1970 +0000
  | | | |  summary:     (31) expand
  | | | |
  | | o |    changeset:   30:6e11cd4b648f
  | | |\ \   parent:      28:44ecd0b9ae99
  | | | | |  parent:      29:cd9bb2be7593
  | | | | |  user:        test
  | | | | |  date:        Thu Jan 01 00:00:30 1970 +0000
  | | | | |  summary:     (30) expand
  | | | | |
  | | | o |  changeset:   29:cd9bb2be7593
  | | | | |  parent:      0:e6eb3150255d
  | | | | |  user:        test
  | | | | |  date:        Thu Jan 01 00:00:29 1970 +0000
  | | | | |  summary:     (29) regular commit
  | | | | |
  | | o | |    changeset:   28:44ecd0b9ae99
  | | |\ \ \   parent:      1:6db2ef61d156
  | | | | | |  parent:      26:7f25b6c2f0b9
  | | | | | |  user:        test
  | | | | | |  date:        Thu Jan 01 00:00:28 1970 +0000
  | | | | | |  summary:     (28) merge zero known
  | | | | | |
  o | | | | |  changeset:   27:886ed638191b
  |/ / / / /   parent:      21:d42a756af44d
  | | | | |    user:        test
  | | | | |    date:        Thu Jan 01 00:00:27 1970 +0000
  | | | | |    summary:     (27) collapse
  | | | | |
  | | o---+  changeset:   26:7f25b6c2f0b9
  | | | | |  parent:      18:1aa84d96232a
  | | | | |  parent:      25:91da8ed57247
  | | | | |  user:        test
  | | | | |  date:        Thu Jan 01 00:00:26 1970 +0000
  | | | | |  summary:     (26) merge one known; far right
  | | | | |
  +---o | |  changeset:   25:91da8ed57247
  | | | | |  parent:      21:d42a756af44d
  | | | | |  parent:      24:a9c19a3d96b7
  | | | | |  user:        test
  | | | | |  date:        Thu Jan 01 00:00:25 1970 +0000
  | | | | |  summary:     (25) merge one known; far left
  | | | | |
  | | o | |  changeset:   24:a9c19a3d96b7
  | | |\| |  parent:      0:e6eb3150255d
  | | | | |  parent:      23:a01cddf0766d
  | | | | |  user:        test
  | | | | |  date:        Thu Jan 01 00:00:24 1970 +0000
  | | | | |  summary:     (24) merge one known; immediate right
  | | | | |
  | | o | |  changeset:   23:a01cddf0766d
  | |/| | |  parent:      1:6db2ef61d156
  | | | | |  parent:      22:e0d9cccacb5d
  | | | | |  user:        test
  | | | | |  date:        Thu Jan 01 00:00:23 1970 +0000
  | | | | |  summary:     (23) merge one known; immediate left
  | | | | |
  +---o---+  changeset:   22:e0d9cccacb5d
  | |   | |  parent:      18:1aa84d96232a
  | |  / /   parent:      21:d42a756af44d
  | | | |    user:        test
  | | | |    date:        Thu Jan 01 00:00:22 1970 +0000
  | | | |    summary:     (22) merge two known; one far left, one far right
  | | | |
  o | | |    changeset:   21:d42a756af44d
  |\ \ \ \   parent:      19:31ddc2c1573b
  | | | | |  parent:      20:d30ed6450e32
  | | | | |  user:        test
  | | | | |  date:        Thu Jan 01 00:00:21 1970 +0000
  | | | | |  summary:     (21) expand
  | | | | |
  | o---+-+  changeset:   20:d30ed6450e32
  |   | | |  parent:      0:e6eb3150255d
  |  / / /   parent:      18:1aa84d96232a
  | | | |    user:        test
  | | | |    date:        Thu Jan 01 00:00:20 1970 +0000
  | | | |    summary:     (20) merge two known; two far right
  | | | |
  o | | |    changeset:   19:31ddc2c1573b
  |\ \ \ \   parent:      15:1dda3f72782d
  | | | | |  parent:      17:44765d7c06e0
  | | | | |  user:        test
  | | | | |  date:        Thu Jan 01 00:00:19 1970 +0000
  | | | | |  summary:     (19) expand
  | | | | |
  +---+---o  changeset:   18:1aa84d96232a
  | | | |    parent:      1:6db2ef61d156
  | | | |    parent:      15:1dda3f72782d
  | | | |    user:        test
  | | | |    date:        Thu Jan 01 00:00:18 1970 +0000
  | | | |    summary:     (18) merge two known; two far left
  | | | |
  | o | |    changeset:   17:44765d7c06e0
  | |\ \ \   parent:      12:86b91144a6e9
  | | | | |  parent:      16:3677d192927d
  | | | | |  user:        test
  | | | | |  date:        Thu Jan 01 00:00:17 1970 +0000
  | | | | |  summary:     (17) expand
  | | | | |
  | | o---+  changeset:   16:3677d192927d
  | | | | |  parent:      0:e6eb3150255d
  | | |/ /   parent:      1:6db2ef61d156
  | | | |    user:        test
  | | | |    date:        Thu Jan 01 00:00:16 1970 +0000
  | | | |    summary:     (16) merge two known; one immediate right, one near right
  | | | |
  o | | |    changeset:   15:1dda3f72782d
  |\ \ \ \   parent:      13:22d8966a97e3
  | | | | |  parent:      14:8eac370358ef
  | | | | |  user:        test
  | | | | |  date:        Thu Jan 01 00:00:15 1970 +0000
  | | | | |  summary:     (15) expand
  | | | | |
  | o-----+  changeset:   14:8eac370358ef
  | | | | |  parent:      0:e6eb3150255d
  | |/ / /   parent:      12:86b91144a6e9
  | | | |    user:        test
  | | | |    date:        Thu Jan 01 00:00:14 1970 +0000
  | | | |    summary:     (14) merge two known; one immediate right, one far right
  | | | |
  o | | |    changeset:   13:22d8966a97e3
  |\ \ \ \   parent:      9:7010c0af0a35
  | | | | |  parent:      11:832d76e6bdf2
  | | | | |  user:        test
  | | | | |  date:        Thu Jan 01 00:00:13 1970 +0000
  | | | | |  summary:     (13) expand
  | | | | |
  +---o | |  changeset:   12:86b91144a6e9
  | | |/ /   parent:      1:6db2ef61d156
  | | | |    parent:      9:7010c0af0a35
  | | | |    user:        test
  | | | |    date:        Thu Jan 01 00:00:12 1970 +0000
  | | | |    summary:     (12) merge two known; one immediate right, one far left
  | | | |
  | o | |    changeset:   11:832d76e6bdf2
  | |\ \ \   parent:      6:b105a072e251
  | | | | |  parent:      10:74c64d036d72
  | | | | |  user:        test
  | | | | |  date:        Thu Jan 01 00:00:11 1970 +0000
  | | | | |  summary:     (11) expand
  | | | | |
  | | o---+  changeset:   10:74c64d036d72
  | | | | |  parent:      0:e6eb3150255d
  | |/ / /   parent:      6:b105a072e251
  | | | |    user:        test
  | | | |    date:        Thu Jan 01 00:00:10 1970 +0000
  | | | |    summary:     (10) merge two known; one immediate left, one near right
  | | | |
  o | | |    changeset:   9:7010c0af0a35
  |\ \ \ \   parent:      7:b632bb1b1224
  | | | | |  parent:      8:7a0b11f71937
  | | | | |  user:        test
  | | | | |  date:        Thu Jan 01 00:00:09 1970 +0000
  | | | | |  summary:     (9) expand
  | | | | |
  | o-----+  changeset:   8:7a0b11f71937
  | | | | |  parent:      0:e6eb3150255d
  |/ / / /   parent:      7:b632bb1b1224
  | | | |    user:        test
  | | | |    date:        Thu Jan 01 00:00:08 1970 +0000
  | | | |    summary:     (8) merge two known; one immediate left, one far right
  | | | |
  o | | |    changeset:   7:b632bb1b1224
  |\ \ \ \   parent:      2:3d9a33b8d1e1
  | | | | |  parent:      5:4409d547b708
  | | | | |  user:        test
  | | | | |  date:        Thu Jan 01 00:00:07 1970 +0000
  | | | | |  summary:     (7) expand
  | | | | |
  +---o | |  changeset:   6:b105a072e251
  | |/ / /   parent:      2:3d9a33b8d1e1
  | | | |    parent:      5:4409d547b708
  | | | |    user:        test
  | | | |    date:        Thu Jan 01 00:00:06 1970 +0000
  | | | |    summary:     (6) merge two known; one immediate left, one far left
  | | | |
  | o | |    changeset:   5:4409d547b708
  | |\ \ \   parent:      3:27eef8ed80b4
  | | | | |  parent:      4:26a8bac39d9f
  | | | | |  user:        test
  | | | | |  date:        Thu Jan 01 00:00:05 1970 +0000
  | | | | |  summary:     (5) expand
  | | | | |
  | | o | |  changeset:   4:26a8bac39d9f
  | |/|/ /   parent:      1:6db2ef61d156
  | | | |    parent:      3:27eef8ed80b4
  | | | |    user:        test
  | | | |    date:        Thu Jan 01 00:00:04 1970 +0000
  | | | |    summary:     (4) merge two known; one immediate left, one immediate right
  | | | |
  | o | |  changeset:   3:27eef8ed80b4
  |/ / /   user:        test
  | | |    date:        Thu Jan 01 00:00:03 1970 +0000
  | | |    summary:     (3) collapse
  | | |
  o | |  changeset:   2:3d9a33b8d1e1
  |/ /   user:        test
  | |    date:        Thu Jan 01 00:00:02 1970 +0000
  | |    summary:     (2) collapse
  | |
  o |  changeset:   1:6db2ef61d156
  |/   user:        test
  |    date:        Thu Jan 01 00:00:01 1970 +0000
  |    summary:     (1) collapse
  |
  o  changeset:   0:e6eb3150255d
     user:        test
     date:        Thu Jan 01 00:00:00 1970 +0000
     summary:     (0) root
  

File glog:
  $ hg log -G a
  @  changeset:   34:fea3ac5810e0
  |  tag:         tip
  |  parent:      32:d06dffa21a31
  |  user:        test
  |  date:        Thu Jan 01 00:00:34 1970 +0000
  |  summary:     (34) head
  |
  | o  changeset:   33:68608f5145f9
  | |  parent:      18:1aa84d96232a
  | |  user:        test
  | |  date:        Thu Jan 01 00:00:33 1970 +0000
  | |  summary:     (33) head
  | |
  o |    changeset:   32:d06dffa21a31
  |\ \   parent:      27:886ed638191b
  | | |  parent:      31:621d83e11f67
  | | |  user:        test
  | | |  date:        Thu Jan 01 00:00:32 1970 +0000
  | | |  summary:     (32) expand
  | | |
  | o |    changeset:   31:621d83e11f67
  | |\ \   parent:      21:d42a756af44d
  | | | |  parent:      30:6e11cd4b648f
  | | | |  user:        test
  | | | |  date:        Thu Jan 01 00:00:31 1970 +0000
  | | | |  summary:     (31) expand
  | | | |
  | | o |    changeset:   30:6e11cd4b648f
  | | |\ \   parent:      28:44ecd0b9ae99
  | | | | |  parent:      29:cd9bb2be7593
  | | | | |  user:        test
  | | | | |  date:        Thu Jan 01 00:00:30 1970 +0000
  | | | | |  summary:     (30) expand
  | | | | |
  | | | o |  changeset:   29:cd9bb2be7593
  | | | | |  parent:      0:e6eb3150255d
  | | | | |  user:        test
  | | | | |  date:        Thu Jan 01 00:00:29 1970 +0000
  | | | | |  summary:     (29) regular commit
  | | | | |
  | | o | |    changeset:   28:44ecd0b9ae99
  | | |\ \ \   parent:      1:6db2ef61d156
  | | | | | |  parent:      26:7f25b6c2f0b9
  | | | | | |  user:        test
  | | | | | |  date:        Thu Jan 01 00:00:28 1970 +0000
  | | | | | |  summary:     (28) merge zero known
  | | | | | |
  o | | | | |  changeset:   27:886ed638191b
  |/ / / / /   parent:      21:d42a756af44d
  | | | | |    user:        test
  | | | | |    date:        Thu Jan 01 00:00:27 1970 +0000
  | | | | |    summary:     (27) collapse
  | | | | |
  | | o---+  changeset:   26:7f25b6c2f0b9
  | | | | |  parent:      18:1aa84d96232a
  | | | | |  parent:      25:91da8ed57247
  | | | | |  user:        test
  | | | | |  date:        Thu Jan 01 00:00:26 1970 +0000
  | | | | |  summary:     (26) merge one known; far right
  | | | | |
  +---o | |  changeset:   25:91da8ed57247
  | | | | |  parent:      21:d42a756af44d
  | | | | |  parent:      24:a9c19a3d96b7
  | | | | |  user:        test
  | | | | |  date:        Thu Jan 01 00:00:25 1970 +0000
  | | | | |  summary:     (25) merge one known; far left
  | | | | |
  | | o | |  changeset:   24:a9c19a3d96b7
  | | |\| |  parent:      0:e6eb3150255d
  | | | | |  parent:      23:a01cddf0766d
  | | | | |  user:        test
  | | | | |  date:        Thu Jan 01 00:00:24 1970 +0000
  | | | | |  summary:     (24) merge one known; immediate right
  | | | | |
  | | o | |  changeset:   23:a01cddf0766d
  | |/| | |  parent:      1:6db2ef61d156
  | | | | |  parent:      22:e0d9cccacb5d
  | | | | |  user:        test
  | | | | |  date:        Thu Jan 01 00:00:23 1970 +0000
  | | | | |  summary:     (23) merge one known; immediate left
  | | | | |
  +---o---+  changeset:   22:e0d9cccacb5d
  | |   | |  parent:      18:1aa84d96232a
  | |  / /   parent:      21:d42a756af44d
  | | | |    user:        test
  | | | |    date:        Thu Jan 01 00:00:22 1970 +0000
  | | | |    summary:     (22) merge two known; one far left, one far right
  | | | |
  o | | |    changeset:   21:d42a756af44d
  |\ \ \ \   parent:      19:31ddc2c1573b
  | | | | |  parent:      20:d30ed6450e32
  | | | | |  user:        test
  | | | | |  date:        Thu Jan 01 00:00:21 1970 +0000
  | | | | |  summary:     (21) expand
  | | | | |
  | o---+-+  changeset:   20:d30ed6450e32
  |   | | |  parent:      0:e6eb3150255d
  |  / / /   parent:      18:1aa84d96232a
  | | | |    user:        test
  | | | |    date:        Thu Jan 01 00:00:20 1970 +0000
  | | | |    summary:     (20) merge two known; two far right
  | | | |
  o | | |    changeset:   19:31ddc2c1573b
  |\ \ \ \   parent:      15:1dda3f72782d
  | | | | |  parent:      17:44765d7c06e0
  | | | | |  user:        test
  | | | | |  date:        Thu Jan 01 00:00:19 1970 +0000
  | | | | |  summary:     (19) expand
  | | | | |
  +---+---o  changeset:   18:1aa84d96232a
  | | | |    parent:      1:6db2ef61d156
  | | | |    parent:      15:1dda3f72782d
  | | | |    user:        test
  | | | |    date:        Thu Jan 01 00:00:18 1970 +0000
  | | | |    summary:     (18) merge two known; two far left
  | | | |
  | o | |    changeset:   17:44765d7c06e0
  | |\ \ \   parent:      12:86b91144a6e9
  | | | | |  parent:      16:3677d192927d
  | | | | |  user:        test
  | | | | |  date:        Thu Jan 01 00:00:17 1970 +0000
  | | | | |  summary:     (17) expand
  | | | | |
  | | o---+  changeset:   16:3677d192927d
  | | | | |  parent:      0:e6eb3150255d
  | | |/ /   parent:      1:6db2ef61d156
  | | | |    user:        test
  | | | |    date:        Thu Jan 01 00:00:16 1970 +0000
  | | | |    summary:     (16) merge two known; one immediate right, one near right
  | | | |
  o | | |    changeset:   15:1dda3f72782d
  |\ \ \ \   parent:      13:22d8966a97e3
  | | | | |  parent:      14:8eac370358ef
  | | | | |  user:        test
  | | | | |  date:        Thu Jan 01 00:00:15 1970 +0000
  | | | | |  summary:     (15) expand
  | | | | |
  | o-----+  changeset:   14:8eac370358ef
  | | | | |  parent:      0:e6eb3150255d
  | |/ / /   parent:      12:86b91144a6e9
  | | | |    user:        test
  | | | |    date:        Thu Jan 01 00:00:14 1970 +0000
  | | | |    summary:     (14) merge two known; one immediate right, one far right
  | | | |
  o | | |    changeset:   13:22d8966a97e3
  |\ \ \ \   parent:      9:7010c0af0a35
  | | | | |  parent:      11:832d76e6bdf2
  | | | | |  user:        test
  | | | | |  date:        Thu Jan 01 00:00:13 1970 +0000
  | | | | |  summary:     (13) expand
  | | | | |
  +---o | |  changeset:   12:86b91144a6e9
  | | |/ /   parent:      1:6db2ef61d156
  | | | |    parent:      9:7010c0af0a35
  | | | |    user:        test
  | | | |    date:        Thu Jan 01 00:00:12 1970 +0000
  | | | |    summary:     (12) merge two known; one immediate right, one far left
  | | | |
  | o | |    changeset:   11:832d76e6bdf2
  | |\ \ \   parent:      6:b105a072e251
  | | | | |  parent:      10:74c64d036d72
  | | | | |  user:        test
  | | | | |  date:        Thu Jan 01 00:00:11 1970 +0000
  | | | | |  summary:     (11) expand
  | | | | |
  | | o---+  changeset:   10:74c64d036d72
  | | | | |  parent:      0:e6eb3150255d
  | |/ / /   parent:      6:b105a072e251
  | | | |    user:        test
  | | | |    date:        Thu Jan 01 00:00:10 1970 +0000
  | | | |    summary:     (10) merge two known; one immediate left, one near right
  | | | |
  o | | |    changeset:   9:7010c0af0a35
  |\ \ \ \   parent:      7:b632bb1b1224
  | | | | |  parent:      8:7a0b11f71937
  | | | | |  user:        test
  | | | | |  date:        Thu Jan 01 00:00:09 1970 +0000
  | | | | |  summary:     (9) expand
  | | | | |
  | o-----+  changeset:   8:7a0b11f71937
  | | | | |  parent:      0:e6eb3150255d
  |/ / / /   parent:      7:b632bb1b1224
  | | | |    user:        test
  | | | |    date:        Thu Jan 01 00:00:08 1970 +0000
  | | | |    summary:     (8) merge two known; one immediate left, one far right
  | | | |
  o | | |    changeset:   7:b632bb1b1224
  |\ \ \ \   parent:      2:3d9a33b8d1e1
  | | | | |  parent:      5:4409d547b708
  | | | | |  user:        test
  | | | | |  date:        Thu Jan 01 00:00:07 1970 +0000
  | | | | |  summary:     (7) expand
  | | | | |
  +---o | |  changeset:   6:b105a072e251
  | |/ / /   parent:      2:3d9a33b8d1e1
  | | | |    parent:      5:4409d547b708
  | | | |    user:        test
  | | | |    date:        Thu Jan 01 00:00:06 1970 +0000
  | | | |    summary:     (6) merge two known; one immediate left, one far left
  | | | |
  | o | |    changeset:   5:4409d547b708
  | |\ \ \   parent:      3:27eef8ed80b4
  | | | | |  parent:      4:26a8bac39d9f
  | | | | |  user:        test
  | | | | |  date:        Thu Jan 01 00:00:05 1970 +0000
  | | | | |  summary:     (5) expand
  | | | | |
  | | o | |  changeset:   4:26a8bac39d9f
  | |/|/ /   parent:      1:6db2ef61d156
  | | | |    parent:      3:27eef8ed80b4
  | | | |    user:        test
  | | | |    date:        Thu Jan 01 00:00:04 1970 +0000
  | | | |    summary:     (4) merge two known; one immediate left, one immediate right
  | | | |
  | o | |  changeset:   3:27eef8ed80b4
  |/ / /   user:        test
  | | |    date:        Thu Jan 01 00:00:03 1970 +0000
  | | |    summary:     (3) collapse
  | | |
  o | |  changeset:   2:3d9a33b8d1e1
  |/ /   user:        test
  | |    date:        Thu Jan 01 00:00:02 1970 +0000
  | |    summary:     (2) collapse
  | |
  o |  changeset:   1:6db2ef61d156
  |/   user:        test
  |    date:        Thu Jan 01 00:00:01 1970 +0000
  |    summary:     (1) collapse
  |
  o  changeset:   0:e6eb3150255d
     user:        test
     date:        Thu Jan 01 00:00:00 1970 +0000
     summary:     (0) root
  

File glog per revset:

  $ hg log -G -r 'file("a")'
  @  changeset:   34:fea3ac5810e0
  |  tag:         tip
  |  parent:      32:d06dffa21a31
  |  user:        test
  |  date:        Thu Jan 01 00:00:34 1970 +0000
  |  summary:     (34) head
  |
  | o  changeset:   33:68608f5145f9
  | |  parent:      18:1aa84d96232a
  | |  user:        test
  | |  date:        Thu Jan 01 00:00:33 1970 +0000
  | |  summary:     (33) head
  | |
  o |    changeset:   32:d06dffa21a31
  |\ \   parent:      27:886ed638191b
  | | |  parent:      31:621d83e11f67
  | | |  user:        test
  | | |  date:        Thu Jan 01 00:00:32 1970 +0000
  | | |  summary:     (32) expand
  | | |
  | o |    changeset:   31:621d83e11f67
  | |\ \   parent:      21:d42a756af44d
  | | | |  parent:      30:6e11cd4b648f
  | | | |  user:        test
  | | | |  date:        Thu Jan 01 00:00:31 1970 +0000
  | | | |  summary:     (31) expand
  | | | |
  | | o |    changeset:   30:6e11cd4b648f
  | | |\ \   parent:      28:44ecd0b9ae99
  | | | | |  parent:      29:cd9bb2be7593
  | | | | |  user:        test
  | | | | |  date:        Thu Jan 01 00:00:30 1970 +0000
  | | | | |  summary:     (30) expand
  | | | | |
  | | | o |  changeset:   29:cd9bb2be7593
  | | | | |  parent:      0:e6eb3150255d
  | | | | |  user:        test
  | | | | |  date:        Thu Jan 01 00:00:29 1970 +0000
  | | | | |  summary:     (29) regular commit
  | | | | |
  | | o | |    changeset:   28:44ecd0b9ae99
  | | |\ \ \   parent:      1:6db2ef61d156
  | | | | | |  parent:      26:7f25b6c2f0b9
  | | | | | |  user:        test
  | | | | | |  date:        Thu Jan 01 00:00:28 1970 +0000
  | | | | | |  summary:     (28) merge zero known
  | | | | | |
  o | | | | |  changeset:   27:886ed638191b
  |/ / / / /   parent:      21:d42a756af44d
  | | | | |    user:        test
  | | | | |    date:        Thu Jan 01 00:00:27 1970 +0000
  | | | | |    summary:     (27) collapse
  | | | | |
  | | o---+  changeset:   26:7f25b6c2f0b9
  | | | | |  parent:      18:1aa84d96232a
  | | | | |  parent:      25:91da8ed57247
  | | | | |  user:        test
  | | | | |  date:        Thu Jan 01 00:00:26 1970 +0000
  | | | | |  summary:     (26) merge one known; far right
  | | | | |
  +---o | |  changeset:   25:91da8ed57247
  | | | | |  parent:      21:d42a756af44d
  | | | | |  parent:      24:a9c19a3d96b7
  | | | | |  user:        test
  | | | | |  date:        Thu Jan 01 00:00:25 1970 +0000
  | | | | |  summary:     (25) merge one known; far left
  | | | | |
  | | o | |  changeset:   24:a9c19a3d96b7
  | | |\| |  parent:      0:e6eb3150255d
  | | | | |  parent:      23:a01cddf0766d
  | | | | |  user:        test
  | | | | |  date:        Thu Jan 01 00:00:24 1970 +0000
  | | | | |  summary:     (24) merge one known; immediate right
  | | | | |
  | | o | |  changeset:   23:a01cddf0766d
  | |/| | |  parent:      1:6db2ef61d156
  | | | | |  parent:      22:e0d9cccacb5d
  | | | | |  user:        test
  | | | | |  date:        Thu Jan 01 00:00:23 1970 +0000
  | | | | |  summary:     (23) merge one known; immediate left
  | | | | |
  +---o---+  changeset:   22:e0d9cccacb5d
  | |   | |  parent:      18:1aa84d96232a
  | |  / /   parent:      21:d42a756af44d
  | | | |    user:        test
  | | | |    date:        Thu Jan 01 00:00:22 1970 +0000
  | | | |    summary:     (22) merge two known; one far left, one far right
  | | | |
  o | | |    changeset:   21:d42a756af44d
  |\ \ \ \   parent:      19:31ddc2c1573b
  | | | | |  parent:      20:d30ed6450e32
  | | | | |  user:        test
  | | | | |  date:        Thu Jan 01 00:00:21 1970 +0000
  | | | | |  summary:     (21) expand
  | | | | |
  | o---+-+  changeset:   20:d30ed6450e32
  |   | | |  parent:      0:e6eb3150255d
  |  / / /   parent:      18:1aa84d96232a
  | | | |    user:        test
  | | | |    date:        Thu Jan 01 00:00:20 1970 +0000
  | | | |    summary:     (20) merge two known; two far right
  | | | |
  o | | |    changeset:   19:31ddc2c1573b
  |\ \ \ \   parent:      15:1dda3f72782d
  | | | | |  parent:      17:44765d7c06e0
  | | | | |  user:        test
  | | | | |  date:        Thu Jan 01 00:00:19 1970 +0000
  | | | | |  summary:     (19) expand
  | | | | |
  +---+---o  changeset:   18:1aa84d96232a
  | | | |    parent:      1:6db2ef61d156
  | | | |    parent:      15:1dda3f72782d
  | | | |    user:        test
  | | | |    date:        Thu Jan 01 00:00:18 1970 +0000
  | | | |    summary:     (18) merge two known; two far left
  | | | |
  | o | |    changeset:   17:44765d7c06e0
  | |\ \ \   parent:      12:86b91144a6e9
  | | | | |  parent:      16:3677d192927d
  | | | | |  user:        test
  | | | | |  date:        Thu Jan 01 00:00:17 1970 +0000
  | | | | |  summary:     (17) expand
  | | | | |
  | | o---+  changeset:   16:3677d192927d
  | | | | |  parent:      0:e6eb3150255d
  | | |/ /   parent:      1:6db2ef61d156
  | | | |    user:        test
  | | | |    date:        Thu Jan 01 00:00:16 1970 +0000
  | | | |    summary:     (16) merge two known; one immediate right, one near right
  | | | |
  o | | |    changeset:   15:1dda3f72782d
  |\ \ \ \   parent:      13:22d8966a97e3
  | | | | |  parent:      14:8eac370358ef
  | | | | |  user:        test
  | | | | |  date:        Thu Jan 01 00:00:15 1970 +0000
  | | | | |  summary:     (15) expand
  | | | | |
  | o-----+  changeset:   14:8eac370358ef
  | | | | |  parent:      0:e6eb3150255d
  | |/ / /   parent:      12:86b91144a6e9
  | | | |    user:        test
  | | | |    date:        Thu Jan 01 00:00:14 1970 +0000
  | | | |    summary:     (14) merge two known; one immediate right, one far right
  | | | |
  o | | |    changeset:   13:22d8966a97e3
  |\ \ \ \   parent:      9:7010c0af0a35
  | | | | |  parent:      11:832d76e6bdf2
  | | | | |  user:        test
  | | | | |  date:        Thu Jan 01 00:00:13 1970 +0000
  | | | | |  summary:     (13) expand
  | | | | |
  +---o | |  changeset:   12:86b91144a6e9
  | | |/ /   parent:      1:6db2ef61d156
  | | | |    parent:      9:7010c0af0a35
  | | | |    user:        test
  | | | |    date:        Thu Jan 01 00:00:12 1970 +0000
  | | | |    summary:     (12) merge two known; one immediate right, one far left
  | | | |
  | o | |    changeset:   11:832d76e6bdf2
  | |\ \ \   parent:      6:b105a072e251
  | | | | |  parent:      10:74c64d036d72
  | | | | |  user:        test
  | | | | |  date:        Thu Jan 01 00:00:11 1970 +0000
  | | | | |  summary:     (11) expand
  | | | | |
  | | o---+  changeset:   10:74c64d036d72
  | | | | |  parent:      0:e6eb3150255d
  | |/ / /   parent:      6:b105a072e251
  | | | |    user:        test
  | | | |    date:        Thu Jan 01 00:00:10 1970 +0000
  | | | |    summary:     (10) merge two known; one immediate left, one near right
  | | | |
  o | | |    changeset:   9:7010c0af0a35
  |\ \ \ \   parent:      7:b632bb1b1224
  | | | | |  parent:      8:7a0b11f71937
  | | | | |  user:        test
  | | | | |  date:        Thu Jan 01 00:00:09 1970 +0000
  | | | | |  summary:     (9) expand
  | | | | |
  | o-----+  changeset:   8:7a0b11f71937
  | | | | |  parent:      0:e6eb3150255d
  |/ / / /   parent:      7:b632bb1b1224
  | | | |    user:        test
  | | | |    date:        Thu Jan 01 00:00:08 1970 +0000
  | | | |    summary:     (8) merge two known; one immediate left, one far right
  | | | |
  o | | |    changeset:   7:b632bb1b1224
  |\ \ \ \   parent:      2:3d9a33b8d1e1
  | | | | |  parent:      5:4409d547b708
  | | | | |  user:        test
  | | | | |  date:        Thu Jan 01 00:00:07 1970 +0000
  | | | | |  summary:     (7) expand
  | | | | |
  +---o | |  changeset:   6:b105a072e251
  | |/ / /   parent:      2:3d9a33b8d1e1
  | | | |    parent:      5:4409d547b708
  | | | |    user:        test
  | | | |    date:        Thu Jan 01 00:00:06 1970 +0000
  | | | |    summary:     (6) merge two known; one immediate left, one far left
  | | | |
  | o | |    changeset:   5:4409d547b708
  | |\ \ \   parent:      3:27eef8ed80b4
  | | | | |  parent:      4:26a8bac39d9f
  | | | | |  user:        test
  | | | | |  date:        Thu Jan 01 00:00:05 1970 +0000
  | | | | |  summary:     (5) expand
  | | | | |
  | | o | |  changeset:   4:26a8bac39d9f
  | |/|/ /   parent:      1:6db2ef61d156
  | | | |    parent:      3:27eef8ed80b4
  | | | |    user:        test
  | | | |    date:        Thu Jan 01 00:00:04 1970 +0000
  | | | |    summary:     (4) merge two known; one immediate left, one immediate right
  | | | |
  | o | |  changeset:   3:27eef8ed80b4
  |/ / /   user:        test
  | | |    date:        Thu Jan 01 00:00:03 1970 +0000
  | | |    summary:     (3) collapse
  | | |
  o | |  changeset:   2:3d9a33b8d1e1
  |/ /   user:        test
  | |    date:        Thu Jan 01 00:00:02 1970 +0000
  | |    summary:     (2) collapse
  | |
  o |  changeset:   1:6db2ef61d156
  |/   user:        test
  |    date:        Thu Jan 01 00:00:01 1970 +0000
  |    summary:     (1) collapse
  |
  o  changeset:   0:e6eb3150255d
     user:        test
     date:        Thu Jan 01 00:00:00 1970 +0000
     summary:     (0) root
  


File glog per revset (only merges):

  $ hg log -G -r 'file("a")' -m
  o    changeset:   32:d06dffa21a31
  |\   parent:      27:886ed638191b
  | :  parent:      31:621d83e11f67
  | :  user:        test
  | :  date:        Thu Jan 01 00:00:32 1970 +0000
  | :  summary:     (32) expand
  | :
  o :  changeset:   31:621d83e11f67
  |\:  parent:      21:d42a756af44d
  | :  parent:      30:6e11cd4b648f
  | :  user:        test
  | :  date:        Thu Jan 01 00:00:31 1970 +0000
  | :  summary:     (31) expand
  | :
  o :    changeset:   30:6e11cd4b648f
  |\ \   parent:      28:44ecd0b9ae99
  | ~ :  parent:      29:cd9bb2be7593
  |   :  user:        test
  |   :  date:        Thu Jan 01 00:00:30 1970 +0000
  |   :  summary:     (30) expand
  |  /
  o :    changeset:   28:44ecd0b9ae99
  |\ \   parent:      1:6db2ef61d156
  | ~ :  parent:      26:7f25b6c2f0b9
  |   :  user:        test
  |   :  date:        Thu Jan 01 00:00:28 1970 +0000
  |   :  summary:     (28) merge zero known
  |  /
  o :    changeset:   26:7f25b6c2f0b9
  |\ \   parent:      18:1aa84d96232a
  | | :  parent:      25:91da8ed57247
  | | :  user:        test
  | | :  date:        Thu Jan 01 00:00:26 1970 +0000
  | | :  summary:     (26) merge one known; far right
  | | :
  | o :  changeset:   25:91da8ed57247
  | |\:  parent:      21:d42a756af44d
  | | :  parent:      24:a9c19a3d96b7
  | | :  user:        test
  | | :  date:        Thu Jan 01 00:00:25 1970 +0000
  | | :  summary:     (25) merge one known; far left
  | | :
  | o :    changeset:   24:a9c19a3d96b7
  | |\ \   parent:      0:e6eb3150255d
  | | ~ :  parent:      23:a01cddf0766d
  | |   :  user:        test
  | |   :  date:        Thu Jan 01 00:00:24 1970 +0000
  | |   :  summary:     (24) merge one known; immediate right
  | |  /
  | o :    changeset:   23:a01cddf0766d
  | |\ \   parent:      1:6db2ef61d156
  | | ~ :  parent:      22:e0d9cccacb5d
  | |   :  user:        test
  | |   :  date:        Thu Jan 01 00:00:23 1970 +0000
  | |   :  summary:     (23) merge one known; immediate left
  | |  /
  | o :  changeset:   22:e0d9cccacb5d
  |/:/   parent:      18:1aa84d96232a
  | :    parent:      21:d42a756af44d
  | :    user:        test
  | :    date:        Thu Jan 01 00:00:22 1970 +0000
  | :    summary:     (22) merge two known; one far left, one far right
  | :
  | o    changeset:   21:d42a756af44d
  | |\   parent:      19:31ddc2c1573b
  | | |  parent:      20:d30ed6450e32
  | | |  user:        test
  | | |  date:        Thu Jan 01 00:00:21 1970 +0000
  | | |  summary:     (21) expand
  | | |
  +---o  changeset:   20:d30ed6450e32
  | | |  parent:      0:e6eb3150255d
  | | ~  parent:      18:1aa84d96232a
  | |    user:        test
  | |    date:        Thu Jan 01 00:00:20 1970 +0000
  | |    summary:     (20) merge two known; two far right
  | |
  | o    changeset:   19:31ddc2c1573b
  | |\   parent:      15:1dda3f72782d
  | | |  parent:      17:44765d7c06e0
  | | |  user:        test
  | | |  date:        Thu Jan 01 00:00:19 1970 +0000
  | | |  summary:     (19) expand
  | | |
  o | |  changeset:   18:1aa84d96232a
  |\| |  parent:      1:6db2ef61d156
  ~ | |  parent:      15:1dda3f72782d
    | |  user:        test
    | |  date:        Thu Jan 01 00:00:18 1970 +0000
    | |  summary:     (18) merge two known; two far left
   / /
  | o    changeset:   17:44765d7c06e0
  | |\   parent:      12:86b91144a6e9
  | | |  parent:      16:3677d192927d
  | | |  user:        test
  | | |  date:        Thu Jan 01 00:00:17 1970 +0000
  | | |  summary:     (17) expand
  | | |
  | | o    changeset:   16:3677d192927d
  | | |\   parent:      0:e6eb3150255d
  | | ~ ~  parent:      1:6db2ef61d156
  | |      user:        test
  | |      date:        Thu Jan 01 00:00:16 1970 +0000
  | |      summary:     (16) merge two known; one immediate right, one near right
  | |
  o |    changeset:   15:1dda3f72782d
  |\ \   parent:      13:22d8966a97e3
  | | |  parent:      14:8eac370358ef
  | | |  user:        test
  | | |  date:        Thu Jan 01 00:00:15 1970 +0000
  | | |  summary:     (15) expand
  | | |
  | o |  changeset:   14:8eac370358ef
  | |\|  parent:      0:e6eb3150255d
  | ~ |  parent:      12:86b91144a6e9
  |   |  user:        test
  |   |  date:        Thu Jan 01 00:00:14 1970 +0000
  |   |  summary:     (14) merge two known; one immediate right, one far right
  |  /
  o |    changeset:   13:22d8966a97e3
  |\ \   parent:      9:7010c0af0a35
  | | |  parent:      11:832d76e6bdf2
  | | |  user:        test
  | | |  date:        Thu Jan 01 00:00:13 1970 +0000
  | | |  summary:     (13) expand
  | | |
  +---o  changeset:   12:86b91144a6e9
  | | |  parent:      1:6db2ef61d156
  | | ~  parent:      9:7010c0af0a35
  | |    user:        test
  | |    date:        Thu Jan 01 00:00:12 1970 +0000
  | |    summary:     (12) merge two known; one immediate right, one far left
  | |
  | o    changeset:   11:832d76e6bdf2
  | |\   parent:      6:b105a072e251
  | | |  parent:      10:74c64d036d72
  | | |  user:        test
  | | |  date:        Thu Jan 01 00:00:11 1970 +0000
  | | |  summary:     (11) expand
  | | |
  | | o  changeset:   10:74c64d036d72
  | |/|  parent:      0:e6eb3150255d
  | | ~  parent:      6:b105a072e251
  | |    user:        test
  | |    date:        Thu Jan 01 00:00:10 1970 +0000
  | |    summary:     (10) merge two known; one immediate left, one near right
  | |
  o |    changeset:   9:7010c0af0a35
  |\ \   parent:      7:b632bb1b1224
  | | |  parent:      8:7a0b11f71937
  | | |  user:        test
  | | |  date:        Thu Jan 01 00:00:09 1970 +0000
  | | |  summary:     (9) expand
  | | |
  | o |  changeset:   8:7a0b11f71937
  |/| |  parent:      0:e6eb3150255d
  | ~ |  parent:      7:b632bb1b1224
  |   |  user:        test
  |   |  date:        Thu Jan 01 00:00:08 1970 +0000
  |   |  summary:     (8) merge two known; one immediate left, one far right
  |  /
  o |    changeset:   7:b632bb1b1224
  |\ \   parent:      2:3d9a33b8d1e1
  | ~ |  parent:      5:4409d547b708
  |   |  user:        test
  |   |  date:        Thu Jan 01 00:00:07 1970 +0000
  |   |  summary:     (7) expand
  |  /
  | o  changeset:   6:b105a072e251
  |/|  parent:      2:3d9a33b8d1e1
  | ~  parent:      5:4409d547b708
  |    user:        test
  |    date:        Thu Jan 01 00:00:06 1970 +0000
  |    summary:     (6) merge two known; one immediate left, one far left
  |
  o    changeset:   5:4409d547b708
  |\   parent:      3:27eef8ed80b4
  | ~  parent:      4:26a8bac39d9f
  |    user:        test
  |    date:        Thu Jan 01 00:00:05 1970 +0000
  |    summary:     (5) expand
  |
  o    changeset:   4:26a8bac39d9f
  |\   parent:      1:6db2ef61d156
  ~ ~  parent:      3:27eef8ed80b4
       user:        test
       date:        Thu Jan 01 00:00:04 1970 +0000
       summary:     (4) merge two known; one immediate left, one immediate right
  


Empty revision range - display nothing:
  $ hg log -G -r 1..0

  $ cd ..

#if no-outer-repo

From outer space:
  $ hg log -G -l1 repo
  @  changeset:   34:fea3ac5810e0
  |  tag:         tip
  ~  parent:      32:d06dffa21a31
     user:        test
     date:        Thu Jan 01 00:00:34 1970 +0000
     summary:     (34) head
  
  $ hg log -G -l1 repo/a
  @  changeset:   34:fea3ac5810e0
  |  tag:         tip
  ~  parent:      32:d06dffa21a31
     user:        test
     date:        Thu Jan 01 00:00:34 1970 +0000
     summary:     (34) head
  
  $ hg log -G -l1 repo/missing

#endif

File log with revs != cset revs:
  $ hg init flog
  $ cd flog
  $ echo one >one
  $ hg add one
  $ hg commit -mone
  $ echo two >two
  $ hg add two
  $ hg commit -mtwo
  $ echo more >two
  $ hg commit -mmore
  $ hg log -G two
  @  changeset:   2:12c28321755b
  |  tag:         tip
  |  user:        test
  |  date:        Thu Jan 01 00:00:00 1970 +0000
  |  summary:     more
  |
  o  changeset:   1:5ac72c0599bf
  |  user:        test
  ~  date:        Thu Jan 01 00:00:00 1970 +0000
     summary:     two
  

Issue1896: File log with explicit style
  $ hg log -G --style=default one
  o  changeset:   0:3d578b4a1f53
     user:        test
     date:        Thu Jan 01 00:00:00 1970 +0000
     summary:     one
  
Issue2395: glog --style header and footer
  $ hg log -G --style=xml one
  <?xml version="1.0"?>
  <log>
  o  <logentry revision="0" node="3d578b4a1f537d5fcf7301bfa9c0b97adfaa6fb1">
     <author email="test">test</author>
     <date>1970-01-01T00:00:00+00:00</date>
     <msg xml:space="preserve">one</msg>
     </logentry>
  </log>

  $ cd ..

Incoming and outgoing:

  $ hg clone -U -r31 repo repo2
  adding changesets
  adding manifests
  adding file changes
  added 31 changesets with 31 changes to 1 files
  new changesets e6eb3150255d:621d83e11f67
  $ cd repo2

  $ hg incoming --graph ../repo
  comparing with ../repo
  searching for changes
  o  changeset:   34:fea3ac5810e0
  |  tag:         tip
  |  parent:      32:d06dffa21a31
  |  user:        test
  |  date:        Thu Jan 01 00:00:34 1970 +0000
  |  summary:     (34) head
  |
  | o  changeset:   33:68608f5145f9
  |    parent:      18:1aa84d96232a
  |    user:        test
  |    date:        Thu Jan 01 00:00:33 1970 +0000
  |    summary:     (33) head
  |
  o  changeset:   32:d06dffa21a31
  |  parent:      27:886ed638191b
  |  parent:      31:621d83e11f67
  |  user:        test
  |  date:        Thu Jan 01 00:00:32 1970 +0000
  |  summary:     (32) expand
  |
  o  changeset:   27:886ed638191b
     parent:      21:d42a756af44d
     user:        test
     date:        Thu Jan 01 00:00:27 1970 +0000
     summary:     (27) collapse
  
  $ cd ..

  $ hg -R repo outgoing --graph repo2
  comparing with repo2
  searching for changes
  @  changeset:   34:fea3ac5810e0
  |  tag:         tip
  |  parent:      32:d06dffa21a31
  |  user:        test
  |  date:        Thu Jan 01 00:00:34 1970 +0000
  |  summary:     (34) head
  |
  | o  changeset:   33:68608f5145f9
  |    parent:      18:1aa84d96232a
  |    user:        test
  |    date:        Thu Jan 01 00:00:33 1970 +0000
  |    summary:     (33) head
  |
  o  changeset:   32:d06dffa21a31
  |  parent:      27:886ed638191b
  |  parent:      31:621d83e11f67
  |  user:        test
  |  date:        Thu Jan 01 00:00:32 1970 +0000
  |  summary:     (32) expand
  |
  o  changeset:   27:886ed638191b
     parent:      21:d42a756af44d
     user:        test
     date:        Thu Jan 01 00:00:27 1970 +0000
     summary:     (27) collapse
  

File + limit with revs != cset revs:
  $ cd repo
  $ touch b
  $ hg ci -Aqm0
  $ hg log -G -l2 a
  o  changeset:   34:fea3ac5810e0
  |  parent:      32:d06dffa21a31
  ~  user:        test
     date:        Thu Jan 01 00:00:34 1970 +0000
     summary:     (34) head
  
  o  changeset:   33:68608f5145f9
  |  parent:      18:1aa84d96232a
  ~  user:        test
     date:        Thu Jan 01 00:00:33 1970 +0000
     summary:     (33) head
  

File + limit + -ra:b, (b - a) < limit:
  $ hg log -G -l3000 -r32:tip a
  o  changeset:   34:fea3ac5810e0
  |  parent:      32:d06dffa21a31
  |  user:        test
  |  date:        Thu Jan 01 00:00:34 1970 +0000
  |  summary:     (34) head
  |
  | o  changeset:   33:68608f5145f9
  | |  parent:      18:1aa84d96232a
  | ~  user:        test
  |    date:        Thu Jan 01 00:00:33 1970 +0000
  |    summary:     (33) head
  |
  o    changeset:   32:d06dffa21a31
  |\   parent:      27:886ed638191b
  ~ ~  parent:      31:621d83e11f67
       user:        test
       date:        Thu Jan 01 00:00:32 1970 +0000
       summary:     (32) expand
  

Point out a common and an uncommon unshown parent

  $ hg log -G -r 'rev(8) or rev(9)'
  o    changeset:   9:7010c0af0a35
  |\   parent:      7:b632bb1b1224
  | ~  parent:      8:7a0b11f71937
  |    user:        test
  |    date:        Thu Jan 01 00:00:09 1970 +0000
  |    summary:     (9) expand
  |
  o    changeset:   8:7a0b11f71937
  |\   parent:      0:e6eb3150255d
  ~ ~  parent:      7:b632bb1b1224
       user:        test
       date:        Thu Jan 01 00:00:08 1970 +0000
       summary:     (8) merge two known; one immediate left, one far right
  

File + limit + -ra:b, b < tip:

  $ hg log -G -l1 -r32:34 a
  o  changeset:   34:fea3ac5810e0
  |  parent:      32:d06dffa21a31
  ~  user:        test
     date:        Thu Jan 01 00:00:34 1970 +0000
     summary:     (34) head
  

file(File) + limit + -ra:b, b < tip:

  $ hg log -G -l1 -r32:34 -r 'file("a")'
  o  changeset:   34:fea3ac5810e0
  |  parent:      32:d06dffa21a31
  ~  user:        test
     date:        Thu Jan 01 00:00:34 1970 +0000
     summary:     (34) head
  

limit(file(File) and a::b), b < tip:

  $ hg log -G -r 'limit(file("a") and 32::34, 1)'
  o    changeset:   32:d06dffa21a31
  |\   parent:      27:886ed638191b
  ~ ~  parent:      31:621d83e11f67
       user:        test
       date:        Thu Jan 01 00:00:32 1970 +0000
       summary:     (32) expand
  

File + limit + -ra:b, b < tip:

  $ hg log -G -r 'limit(file("a") and 34::32, 1)'

File + limit + -ra:b, b < tip, (b - a) < limit:

  $ hg log -G -l10 -r33:34 a
  o  changeset:   34:fea3ac5810e0
  |  parent:      32:d06dffa21a31
  ~  user:        test
     date:        Thu Jan 01 00:00:34 1970 +0000
     summary:     (34) head
  
  o  changeset:   33:68608f5145f9
  |  parent:      18:1aa84d96232a
  ~  user:        test
     date:        Thu Jan 01 00:00:33 1970 +0000
     summary:     (33) head
  

Do not crash or produce strange graphs if history is buggy

  $ hg branch branch
  marked working directory as branch branch
  (branches are permanent and global, did you want a bookmark?)
  $ commit 36 "buggy merge: identical parents" 35 35
  $ hg log -G -l5
  @  changeset:   36:08a19a744424
  |  branch:      branch
  |  tag:         tip
  |  parent:      35:9159c3644c5e
  |  parent:      35:9159c3644c5e
  |  user:        test
  |  date:        Thu Jan 01 00:00:36 1970 +0000
  |  summary:     (36) buggy merge: identical parents
  |
  o  changeset:   35:9159c3644c5e
  |  user:        test
  |  date:        Thu Jan 01 00:00:00 1970 +0000
  |  summary:     0
  |
  o  changeset:   34:fea3ac5810e0
  |  parent:      32:d06dffa21a31
  |  user:        test
  |  date:        Thu Jan 01 00:00:34 1970 +0000
  |  summary:     (34) head
  |
  | o  changeset:   33:68608f5145f9
  | |  parent:      18:1aa84d96232a
  | ~  user:        test
  |    date:        Thu Jan 01 00:00:33 1970 +0000
  |    summary:     (33) head
  |
  o    changeset:   32:d06dffa21a31
  |\   parent:      27:886ed638191b
  ~ ~  parent:      31:621d83e11f67
       user:        test
       date:        Thu Jan 01 00:00:32 1970 +0000
       summary:     (32) expand
  

Test log -G options

  $ testlog() {
  >   hg log -G --print-revset "$@"
  >   hg log --template 'nodetag {rev}\n' "$@" | grep nodetag \
  >     | sed 's/.*nodetag/nodetag/' > log.nodes
  >   hg log -G --template 'nodetag {rev}\n' "$@" | grep nodetag \
  >     | sed 's/.*nodetag/nodetag/' > glog.nodes
  >   (cmp log.nodes glog.nodes || diff -u log.nodes glog.nodes) \
  >     | grep '^[-+@ ]' || :
  > }

glog always reorders nodes which explains the difference with log

  $ testlog -r 27 -r 25 -r 21 -r 34 -r 32 -r 31
  ['27', '25', '21', '34', '32', '31']
  []
  <baseset- [21, 25, 27, 31, 32, 34]>
  --- log.nodes	* (glob)
  +++ glog.nodes	* (glob)
  @@ -1,6 +1,6 @@
  -nodetag 27
  -nodetag 25
  -nodetag 21
   nodetag 34
   nodetag 32
   nodetag 31
  +nodetag 27
  +nodetag 25
  +nodetag 21
  $ testlog -u test -u not-a-user
  []
  (or
    (list
      (func
        (symbol 'user')
        (string 'literal:test'))
      (func
        (symbol 'user')
        (string 'literal:not-a-user'))))
  <filteredset
    <spanset- 0:37>,
    <addset
      <filteredset
        <fullreposet+ 0:37>,
        <user 'literal:test'>>,
      <filteredset
        <fullreposet+ 0:37>,
        <user 'literal:not-a-user'>>>>
  $ testlog -b not-a-branch
  abort: unknown revision 'not-a-branch'
  abort: unknown revision 'not-a-branch'
  abort: unknown revision 'not-a-branch'
  $ testlog -b 35 -b 36 --only-branch branch
  []
  (or
    (list
      (func
        (symbol 'branch')
        (string 'literal:default'))
      (or
        (list
          (func
            (symbol 'branch')
            (string 'literal:branch'))
          (func
            (symbol 'branch')
            (string 'literal:branch'))))))
  <filteredset
    <spanset- 0:37>,
    <addset
      <filteredset
        <fullreposet+ 0:37>,
        <branch 'literal:default'>>,
      <addset
        <filteredset
          <fullreposet+ 0:37>,
          <branch 'literal:branch'>>,
        <filteredset
          <fullreposet+ 0:37>,
          <branch 'literal:branch'>>>>>
  $ testlog -k expand -k merge
  []
  (or
    (list
      (func
        (symbol 'keyword')
        (string 'expand'))
      (func
        (symbol 'keyword')
        (string 'merge'))))
  <filteredset
    <spanset- 0:37>,
    <addset
      <filteredset
        <fullreposet+ 0:37>,
        <keyword 'expand'>>,
      <filteredset
        <fullreposet+ 0:37>,
        <keyword 'merge'>>>>
  $ testlog --only-merges
  []
  (func
    (symbol 'merge')
    None)
  <filteredset
    <spanset- 0:37>,
    <merge>>
  $ testlog --no-merges
  []
  (not
    (func
      (symbol 'merge')
      None))
  <filteredset
    <spanset- 0:37>,
    <not
      <filteredset
        <spanset- 0:37>,
        <merge>>>>
  $ testlog --date '2 0 to 4 0'
  []
  (func
    (symbol 'date')
    (string '2 0 to 4 0'))
  <filteredset
    <spanset- 0:37>,
    <date '2 0 to 4 0'>>
  $ hg log -G -d 'brace ) in a date'
  hg: parse error: invalid date: 'brace ) in a date'
  [10]
  $ testlog --prune 31 --prune 32
  []
  (not
    (or
      (list
        (func
          (symbol 'ancestors')
          (string '31'))
        (func
          (symbol 'ancestors')
          (string '32')))))
  <filteredset
    <spanset- 0:37>,
    <not
      <addset
        <filteredset
          <spanset- 0:37>,
          <generatorsetdesc+>>,
        <filteredset
          <spanset- 0:37>,
          <generatorsetdesc+>>>>>

Dedicated repo for --follow and paths filtering. The g is crafted to
have 2 filelog topological heads in a linear changeset graph.

  $ cd ..
  $ hg init follow
  $ cd follow
  $ testlog --follow
  []
  []
  <baseset []>
  $ testlog -rnull
  ['null']
  []
  <baseset [-1]>
  $ echo a > a
  $ echo aa > aa
  $ echo f > f
  $ hg ci -Am "add a" a aa f
  $ hg cp a b
  $ hg cp f g
  $ hg ci -m "copy a b"
  $ mkdir dir
  $ hg mv b dir
  $ echo g >> g
  $ echo f >> f
  $ hg ci -m "mv b dir/b"
  $ hg mv a b
  $ hg cp -f f g
  $ echo a > d
  $ hg add d
  $ hg ci -m "mv a b; add d"
  $ hg mv dir/b e
  $ hg ci -m "mv dir/b e"
  $ hg log -G --template '({rev}) {desc|firstline}\n'
  @  (4) mv dir/b e
  |
  o  (3) mv a b; add d
  |
  o  (2) mv b dir/b
  |
  o  (1) copy a b
  |
  o  (0) add a
  

  $ testlog a
  []
  (func
    (symbol 'filelog')
    (string 'a'))
  <filteredset
    <spanset- 0:5>, set([0])>
  $ testlog a b
  []
  (or
    (list
      (func
        (symbol 'filelog')
        (string 'a'))
      (func
        (symbol 'filelog')
        (string 'b'))))
  <filteredset
    <spanset- 0:5>,
    <addset
      <baseset+ [0]>,
      <baseset+ [1]>>>

Test falling back to slow path for non-existing files

  $ testlog a c
  []
  (func
    (symbol '_matchfiles')
    (list
      (string 'r:')
      (string 'd:relpath')
      (string 'p:a')
      (string 'p:c')))
  <filteredset
    <spanset- 0:5>,
    <matchfiles patterns=['a', 'c'], include=[] exclude=[], default='relpath', rev=2147483647>>

Test multiple --include/--exclude/paths

  $ testlog --include a --include e --exclude b --exclude e a e
  []
  (func
    (symbol '_matchfiles')
    (list
      (string 'r:')
      (string 'd:relpath')
      (string 'p:a')
      (string 'p:e')
      (string 'i:a')
      (string 'i:e')
      (string 'x:b')
      (string 'x:e')))
  <filteredset
    <spanset- 0:5>,
    <matchfiles patterns=['a', 'e'], include=['a', 'e'] exclude=['b', 'e'], default='relpath', rev=2147483647>>

Test glob expansion of pats

  $ expandglobs=`"$PYTHON" -c "import mercurial.util; \
  >   print(mercurial.util.expandglobs and 'true' or 'false')"`
  $ if [ $expandglobs = "true" ]; then
  >    testlog 'a*';
  > else
  >    testlog a*;
  > fi;
  []
  (func
    (symbol 'filelog')
    (string 'aa'))
  <filteredset
    <spanset- 0:5>, set([0])>

Test --follow on a non-existent directory

  $ testlog -f dir
  abort: cannot follow file not in parent revision: "dir"
  abort: cannot follow file not in parent revision: "dir"
  abort: cannot follow file not in parent revision: "dir"

Test --follow on a directory

  $ hg up -q '.^'
  $ testlog -f dir
  []
  (func
    (symbol '_matchfiles')
    (list
      (string 'r:')
      (string 'd:relpath')
      (string 'p:dir')))
  <filteredset
    <generatorsetdesc->,
    <matchfiles patterns=['dir'], include=[] exclude=[], default='relpath', rev=2147483647>>
  $ hg up -q tip

Test --follow on file not in parent revision

  $ testlog -f a
  abort: cannot follow file not in parent revision: "a"
  abort: cannot follow file not in parent revision: "a"
  abort: cannot follow file not in parent revision: "a"

Test --follow and patterns

  $ testlog -f 'glob:*'
  []
  (func
    (symbol '_matchfiles')
    (list
      (string 'r:')
      (string 'd:relpath')
      (string 'p:glob:*')))
  <filteredset
    <generatorsetdesc->,
    <matchfiles patterns=['glob:*'], include=[] exclude=[], default='relpath', rev=2147483647>>

Test --follow on a single rename

  $ hg up -q 2
  $ testlog -f a
  []
  []
  <generatorsetdesc->

Test --follow and multiple renames

  $ hg up -q tip
  $ testlog -f e
  []
  []
  <generatorsetdesc->

Test --follow and multiple filelog heads

  $ hg up -q 2
  $ testlog -f g
  []
  []
  <generatorsetdesc->
  $ cat log.nodes
  nodetag 2
  nodetag 1
  nodetag 0
  $ hg up -q tip
  $ testlog -f g
  []
  []
  <generatorsetdesc->
  $ cat log.nodes
  nodetag 3
  nodetag 2
  nodetag 0

Test --follow and multiple files

  $ testlog -f g e
  []
  []
  <generatorsetdesc->
  $ cat log.nodes
  nodetag 4
  nodetag 3
  nodetag 2
  nodetag 1
  nodetag 0

Test --follow null parent

  $ hg up -q null
  $ testlog -f
  []
  []
  <baseset []>

Test --follow-first

  $ hg up -q 3
  $ echo ee > e
  $ hg ci -Am "add another e" e
  created new head
  $ hg merge --tool internal:other 4
  0 files updated, 1 files merged, 1 files removed, 0 files unresolved
  (branch merge, don't forget to commit)
  $ echo merge > e
  $ hg ci -m "merge 5 and 4"
  $ testlog --follow-first
  []
  []
  <generatorsetdesc->

Cannot compare with log --follow-first FILE as it never worked

  $ hg log -G --print-revset --follow-first e
  []
  []
  <generatorsetdesc->
  $ hg log -G --follow-first e --template '{rev} {desc|firstline}\n'
  @    6 merge 5 and 4
  |\
  | ~
  o  5 add another e
  |
  ~

Test --copies

  $ hg log -G --copies --template "{rev} {desc|firstline} \
  >   copies: {file_copies_switch}\n"
  @    6 merge 5 and 4   copies:
  |\
  | o  5 add another e   copies:
  | |
  o |  4 mv dir/b e   copies: e (dir/b)
  |/
  o  3 mv a b; add d   copies: b (a)g (f)
  |
  o  2 mv b dir/b   copies: dir/b (b)
  |
  o  1 copy a b   copies: b (a)g (f)
  |
  o  0 add a   copies:
  
Test "set:..." and parent revision

  $ hg up -q 4
  $ testlog "set:copied()"
  []
  (func
    (symbol '_matchfiles')
    (list
      (string 'r:')
      (string 'd:relpath')
      (string 'p:set:copied()')))
  <filteredset
    <spanset- 0:7>,
    <matchfiles patterns=['set:copied()'], include=[] exclude=[], default='relpath', rev=2147483647>>
  $ testlog --include "set:copied()"
  []
  (func
    (symbol '_matchfiles')
    (list
      (string 'r:')
      (string 'd:relpath')
      (string 'i:set:copied()')))
  <filteredset
    <spanset- 0:7>,
    <matchfiles patterns=[], include=['set:copied()'] exclude=[], default='relpath', rev=2147483647>>
  $ testlog -r "sort(file('set:copied()'), -rev)"
  ['sort(file(\'set:copied()\'), -rev)']
  []
  <filteredset
    <fullreposet- 0:7>,
    <matchfiles patterns=['set:copied()'], include=[] exclude=[], default='glob', rev=None>>

Test --removed

  $ testlog --removed
  []
  []
  <spanset- 0:7>
  $ testlog --removed a
  []
  (func
    (symbol '_matchfiles')
    (list
      (string 'r:')
      (string 'd:relpath')
      (string 'p:a')))
  <filteredset
    <spanset- 0:7>,
    <matchfiles patterns=['a'], include=[] exclude=[], default='relpath', rev=2147483647>>
  $ testlog --removed --follow a
  []
  (func
    (symbol '_matchfiles')
    (list
      (string 'r:')
      (string 'd:relpath')
      (string 'p:a')))
  <filteredset
    <generatorsetdesc->,
    <matchfiles patterns=['a'], include=[] exclude=[], default='relpath', rev=2147483647>>

Test --patch and --stat with --follow and --follow-first

  $ hg up -q 3
  $ hg log -G --git --patch b
  o  changeset:   1:216d4c92cf98
  |  user:        test
  ~  date:        Thu Jan 01 00:00:00 1970 +0000
     summary:     copy a b
  
     diff --git a/a b/b
     copy from a
     copy to b
  

  $ hg log -G --git --stat b
  o  changeset:   1:216d4c92cf98
  |  user:        test
  ~  date:        Thu Jan 01 00:00:00 1970 +0000
     summary:     copy a b
  
      b |  0
      1 files changed, 0 insertions(+), 0 deletions(-)
  

  $ hg log -G --git --patch --follow b
  o  changeset:   1:216d4c92cf98
  |  user:        test
  |  date:        Thu Jan 01 00:00:00 1970 +0000
  |  summary:     copy a b
  |
  |  diff --git a/a b/b
  |  copy from a
  |  copy to b
  |
  o  changeset:   0:f8035bb17114
     user:        test
     date:        Thu Jan 01 00:00:00 1970 +0000
     summary:     add a
  
     diff --git a/a b/a
     new file mode 100644
     --- /dev/null
     +++ b/a
     @@ -0,0 +1,1 @@
     +a
  

  $ hg log -G --git --stat --follow b
  o  changeset:   1:216d4c92cf98
  |  user:        test
  |  date:        Thu Jan 01 00:00:00 1970 +0000
  |  summary:     copy a b
  |
  |   b |  0
  |   1 files changed, 0 insertions(+), 0 deletions(-)
  |
  o  changeset:   0:f8035bb17114
     user:        test
     date:        Thu Jan 01 00:00:00 1970 +0000
     summary:     add a
  
      a |  1 +
      1 files changed, 1 insertions(+), 0 deletions(-)
  

  $ hg up -q 6
  $ hg log -G --git --patch --follow-first e
  @    changeset:   6:9feeac35a70a
  |\   tag:         tip
  | ~  parent:      5:99b31f1c2782
  |    parent:      4:17d952250a9d
  |    user:        test
  |    date:        Thu Jan 01 00:00:00 1970 +0000
  |    summary:     merge 5 and 4
  |
  |    diff --git a/e b/e
  |    --- a/e
  |    +++ b/e
  |    @@ -1,1 +1,1 @@
  |    -ee
  |    +merge
  |
  o  changeset:   5:99b31f1c2782
  |  parent:      3:5918b8d165d1
  ~  user:        test
     date:        Thu Jan 01 00:00:00 1970 +0000
     summary:     add another e
  
     diff --git a/e b/e
     new file mode 100644
     --- /dev/null
     +++ b/e
     @@ -0,0 +1,1 @@
     +ee
  

Test old-style --rev

  $ hg tag 'foo-bar'
  $ testlog -r 'foo-bar'
  ['foo-bar']
  []
  <baseset [6]>

Test --follow and forward --rev

  $ hg up -q 6
  $ echo g > g
  $ hg ci -Am 'add g' g
  created new head
  $ hg up -q 2
  $ hg log -G --template "{rev} {desc|firstline}\n"
  o  8 add g
  |
  | o  7 Added tag foo-bar for changeset 9feeac35a70a
  |/
  o    6 merge 5 and 4
  |\
  | o  5 add another e
  | |
  o |  4 mv dir/b e
  |/
  o  3 mv a b; add d
  |
  @  2 mv b dir/b
  |
  o  1 copy a b
  |
  o  0 add a
  
  $ hg archive -r 7 archive
  $ grep changessincelatesttag archive/.hg_archival.txt
  changessincelatesttag: 1
  $ rm -r archive

changessincelatesttag with no prior tag
  $ hg archive -r 4 archive
  $ grep changessincelatesttag archive/.hg_archival.txt
  changessincelatesttag: 5

  $ hg export 'all()'
  # HG changeset patch
  # User test
  # Date 0 0
  #      Thu Jan 01 00:00:00 1970 +0000
  # Node ID f8035bb17114da16215af3436ec5222428ace8ee
  # Parent  0000000000000000000000000000000000000000
  add a
  
  diff -r 000000000000 -r f8035bb17114 a
  --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
  +++ b/a	Thu Jan 01 00:00:00 1970 +0000
  @@ -0,0 +1,1 @@
  +a
  diff -r 000000000000 -r f8035bb17114 aa
  --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
  +++ b/aa	Thu Jan 01 00:00:00 1970 +0000
  @@ -0,0 +1,1 @@
  +aa
  diff -r 000000000000 -r f8035bb17114 f
  --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
  +++ b/f	Thu Jan 01 00:00:00 1970 +0000
  @@ -0,0 +1,1 @@
  +f
  # HG changeset patch
  # User test
  # Date 0 0
  #      Thu Jan 01 00:00:00 1970 +0000
  # Node ID 216d4c92cf98ff2b4641d508b76b529f3d424c92
  # Parent  f8035bb17114da16215af3436ec5222428ace8ee
  copy a b
  
  diff -r f8035bb17114 -r 216d4c92cf98 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 @@
  +a
  diff -r f8035bb17114 -r 216d4c92cf98 g
  --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
  +++ b/g	Thu Jan 01 00:00:00 1970 +0000
  @@ -0,0 +1,1 @@
  +f
  # HG changeset patch
  # User test
  # Date 0 0
  #      Thu Jan 01 00:00:00 1970 +0000
  # Node ID bb573313a9e8349099b6ea2b2fb1fc7f424446f3
  # Parent  216d4c92cf98ff2b4641d508b76b529f3d424c92
  mv b dir/b
  
  diff -r 216d4c92cf98 -r bb573313a9e8 b
  --- a/b	Thu Jan 01 00:00:00 1970 +0000
  +++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
  @@ -1,1 +0,0 @@
  -a
  diff -r 216d4c92cf98 -r bb573313a9e8 dir/b
  --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
  +++ b/dir/b	Thu Jan 01 00:00:00 1970 +0000
  @@ -0,0 +1,1 @@
  +a
  diff -r 216d4c92cf98 -r bb573313a9e8 f
  --- a/f	Thu Jan 01 00:00:00 1970 +0000
  +++ b/f	Thu Jan 01 00:00:00 1970 +0000
  @@ -1,1 +1,2 @@
   f
  +f
  diff -r 216d4c92cf98 -r bb573313a9e8 g
  --- a/g	Thu Jan 01 00:00:00 1970 +0000
  +++ b/g	Thu Jan 01 00:00:00 1970 +0000
  @@ -1,1 +1,2 @@
   f
  +g
  # HG changeset patch
  # User test
  # Date 0 0
  #      Thu Jan 01 00:00:00 1970 +0000
  # Node ID 5918b8d165d1364e78a66d02e66caa0133c5d1ed
  # Parent  bb573313a9e8349099b6ea2b2fb1fc7f424446f3
  mv a b; add d
  
  diff -r bb573313a9e8 -r 5918b8d165d1 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 @@
  -a
  diff -r bb573313a9e8 -r 5918b8d165d1 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 @@
  +a
  diff -r bb573313a9e8 -r 5918b8d165d1 d
  --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
  +++ b/d	Thu Jan 01 00:00:00 1970 +0000
  @@ -0,0 +1,1 @@
  +a
  diff -r bb573313a9e8 -r 5918b8d165d1 g
  --- a/g	Thu Jan 01 00:00:00 1970 +0000
  +++ b/g	Thu Jan 01 00:00:00 1970 +0000
  @@ -1,2 +1,2 @@
   f
  -g
  +f
  # HG changeset patch
  # User test
  # Date 0 0
  #      Thu Jan 01 00:00:00 1970 +0000
  # Node ID 17d952250a9d03cc3dc77b199ab60e959b9b0260
  # Parent  5918b8d165d1364e78a66d02e66caa0133c5d1ed
  mv dir/b e
  
  diff -r 5918b8d165d1 -r 17d952250a9d dir/b
  --- a/dir/b	Thu Jan 01 00:00:00 1970 +0000
  +++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
  @@ -1,1 +0,0 @@
  -a
  diff -r 5918b8d165d1 -r 17d952250a9d e
  --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
  +++ b/e	Thu Jan 01 00:00:00 1970 +0000
  @@ -0,0 +1,1 @@
  +a
  # HG changeset patch
  # User test
  # Date 0 0
  #      Thu Jan 01 00:00:00 1970 +0000
  # Node ID 99b31f1c2782e2deb1723cef08930f70fc84b37b
  # Parent  5918b8d165d1364e78a66d02e66caa0133c5d1ed
  add another e
  
  diff -r 5918b8d165d1 -r 99b31f1c2782 e
  --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
  +++ b/e	Thu Jan 01 00:00:00 1970 +0000
  @@ -0,0 +1,1 @@
  +ee
  # HG changeset patch
  # User test
  # Date 0 0
  #      Thu Jan 01 00:00:00 1970 +0000
  # Node ID 9feeac35a70aa325519bbf3178683271113f2b8f
  # Parent  99b31f1c2782e2deb1723cef08930f70fc84b37b
  # Parent  17d952250a9d03cc3dc77b199ab60e959b9b0260
  merge 5 and 4
  
  diff -r 99b31f1c2782 -r 9feeac35a70a dir/b
  --- a/dir/b	Thu Jan 01 00:00:00 1970 +0000
  +++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
  @@ -1,1 +0,0 @@
  -a
  diff -r 99b31f1c2782 -r 9feeac35a70a e
  --- a/e	Thu Jan 01 00:00:00 1970 +0000
  +++ b/e	Thu Jan 01 00:00:00 1970 +0000
  @@ -1,1 +1,1 @@
  -ee
  +merge
  # HG changeset patch
  # User test
  # Date 0 0
  #      Thu Jan 01 00:00:00 1970 +0000
  # Node ID 9febbb9c8b2e09670a2fb550cb1e4e01a2c7e9fd
  # Parent  9feeac35a70aa325519bbf3178683271113f2b8f
  Added tag foo-bar for changeset 9feeac35a70a
  
  diff -r 9feeac35a70a -r 9febbb9c8b2e .hgtags
  --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
  +++ b/.hgtags	Thu Jan 01 00:00:00 1970 +0000
  @@ -0,0 +1,1 @@
  +9feeac35a70aa325519bbf3178683271113f2b8f foo-bar
  # HG changeset patch
  # User test
  # Date 0 0
  #      Thu Jan 01 00:00:00 1970 +0000
  # Node ID 3bd4551ec3fe1c0696241f236abe857a53c6d6e7
  # Parent  9feeac35a70aa325519bbf3178683271113f2b8f
  add g
  
  diff -r 9feeac35a70a -r 3bd4551ec3fe g
  --- a/g	Thu Jan 01 00:00:00 1970 +0000
  +++ b/g	Thu Jan 01 00:00:00 1970 +0000
  @@ -1,2 +1,1 @@
  -f
  -f
  +g
  $ testlog --follow -r6 -r8 -r5 -r7 -r4
  ['6', '8', '5', '7', '4']
  []
  <generatorsetdesc->

Test --follow-first and forward --rev

  $ testlog --follow-first -r6 -r8 -r5 -r7 -r4
  ['6', '8', '5', '7', '4']
  []
  <generatorsetdesc->

Test --follow and backward --rev

  $ testlog --follow -r6 -r5 -r7 -r8 -r4
  ['6', '5', '7', '8', '4']
  []
  <generatorsetdesc->

Test --follow-first and backward --rev

  $ testlog --follow-first -r6 -r5 -r7 -r8 -r4
  ['6', '5', '7', '8', '4']
  []
  <generatorsetdesc->

Test --follow with --rev of graphlog extension

  $ hg --config extensions.graphlog= glog -qfr1
  o  1:216d4c92cf98
  |
  o  0:f8035bb17114
  

Test subdir

  $ hg up -q 3
  $ cd dir
  $ testlog .
  []
  (func
    (symbol '_matchfiles')
    (list
      (string 'r:')
      (string 'd:relpath')
      (string 'p:.')))
  <filteredset
    <spanset- 0:9>,
    <matchfiles patterns=['.'], include=[] exclude=[], default='relpath', rev=2147483647>>
  $ testlog ../b
  []
  (func
    (symbol 'filelog')
    (string '../b'))
  <filteredset
    <spanset- 0:9>, set([1])>
  $ testlog -f ../b
  []
  []
  <generatorsetdesc->
  $ cd ..

Test --hidden
 (enable obsolete)

  $ cat >> $HGRCPATH << EOF
  > [experimental]
  > evolution.createmarkers=True
  > EOF

  $ hg debugobsolete `hg id --debug -i -r 8`
  1 new obsolescence markers
  obsoleted 1 changesets
  $ testlog
  []
  []
  <spanset- 0:9>
  $ testlog --hidden
  []
  []
  <spanset- 0:9>
  $ hg log -G --template '{rev} {desc}\n'
  o  7 Added tag foo-bar for changeset 9feeac35a70a
  |
  o    6 merge 5 and 4
  |\
  | o  5 add another e
  | |
  o |  4 mv dir/b e
  |/
  @  3 mv a b; add d
  |
  o  2 mv b dir/b
  |
  o  1 copy a b
  |
  o  0 add a
  

A template without trailing newline should do something sane

  $ hg log -G -r ::2 --template '{rev} {desc}'
  o  2 mv b dir/b
  |
  o  1 copy a b
  |
  o  0 add a
  

Extra newlines must be preserved

  $ hg log -G -r ::2 --template '\n{rev} {desc}\n\n'
  o
  |  2 mv b dir/b
  |
  o
  |  1 copy a b
  |
  o
     0 add a
  

The almost-empty template should do something sane too ...

  $ hg log -G -r ::2 --template '\n'
  o
  |
  o
  |
  o
  

issue3772

  $ hg log -G -r :null
  o  changeset:   0:f8035bb17114
  |  user:        test
  |  date:        Thu Jan 01 00:00:00 1970 +0000
  |  summary:     add a
  |
  o  changeset:   -1:000000000000
     user:
     date:        Thu Jan 01 00:00:00 1970 +0000
  
  $ hg log -G -r null:null
  o  changeset:   -1:000000000000
     user:
     date:        Thu Jan 01 00:00:00 1970 +0000
  

should not draw line down to null due to the magic of fullreposet

  $ hg log -G -r 'all()' | tail -6
  |
  o  changeset:   0:f8035bb17114
     user:        test
     date:        Thu Jan 01 00:00:00 1970 +0000
     summary:     add a
  

  $ hg log -G -r 'branch(default)' | tail -6
  |
  o  changeset:   0:f8035bb17114
     user:        test
     date:        Thu Jan 01 00:00:00 1970 +0000
     summary:     add a
  

working-directory revision

  $ hg log -G -qr '. + wdir()'
  o  2147483647:ffffffffffff
  |
  @  3:5918b8d165d1
  |
  ~

node template with changesetprinter:

  $ hg log -Gqr 5:7 --config command-templates.graphnode='"{rev}"'
  7  7:9febbb9c8b2e
  |
  6    6:9feeac35a70a
  |\
  | ~
  5  5:99b31f1c2782
  |
  ~

node template with changesetprinter (legacy config):

  $ hg log -Gqr 5:7 --config ui.graphnodetemplate='"{rev}"'
  7  7:9febbb9c8b2e
  |
  6    6:9feeac35a70a
  |\
  | ~
  5  5:99b31f1c2782
  |
  ~

node template with changesettemplater (shared cache variable):

  $ hg log -Gr 5:7 -T '{latesttag % "{rev} {tag}+{distance}"}\n' \
  > --config command-templates.graphnode='{ifeq(latesttagdistance, 0, "#", graphnode)}'
  o  7 foo-bar+1
  |
  #    6 foo-bar+0
  |\
  | ~
  o  5 null+5
  |
  ~

label() should just work in node template:

  $ hg log -Gqr 7 --config extensions.color= --color=debug \
  > --config command-templates.graphnode='{label("branch.{branch}", rev)}'
  [branch.default|7]  [log.node|7:9febbb9c8b2e]
  |
  ~

  $ cd ..

change graph edge styling

  $ cd repo
  $ cat << EOF >> $HGRCPATH
  > [experimental]
  > graphstyle.parent = |
  > graphstyle.grandparent = :
  > graphstyle.missing =
  > EOF
  $ hg log -G -r 'file("a")' -m
  @  changeset:   36:08a19a744424
  :  branch:      branch
  :  tag:         tip
  :  parent:      35:9159c3644c5e
  :  parent:      35:9159c3644c5e
  :  user:        test
  :  date:        Thu Jan 01 00:00:36 1970 +0000
  :  summary:     (36) buggy merge: identical parents
  :
  o    changeset:   32:d06dffa21a31
  |\   parent:      27:886ed638191b
  | :  parent:      31:621d83e11f67
  | :  user:        test
  | :  date:        Thu Jan 01 00:00:32 1970 +0000
  | :  summary:     (32) expand
  | :
  o :  changeset:   31:621d83e11f67
  |\:  parent:      21:d42a756af44d
  | :  parent:      30:6e11cd4b648f
  | :  user:        test
  | :  date:        Thu Jan 01 00:00:31 1970 +0000
  | :  summary:     (31) expand
  | :
  o :    changeset:   30:6e11cd4b648f
  |\ \   parent:      28:44ecd0b9ae99
  | ~ :  parent:      29:cd9bb2be7593
  |   :  user:        test
  |   :  date:        Thu Jan 01 00:00:30 1970 +0000
  |   :  summary:     (30) expand
  |  /
  o :    changeset:   28:44ecd0b9ae99
  |\ \   parent:      1:6db2ef61d156
  | ~ :  parent:      26:7f25b6c2f0b9
  |   :  user:        test
  |   :  date:        Thu Jan 01 00:00:28 1970 +0000
  |   :  summary:     (28) merge zero known
  |  /
  o :    changeset:   26:7f25b6c2f0b9
  |\ \   parent:      18:1aa84d96232a
  | | :  parent:      25:91da8ed57247
  | | :  user:        test
  | | :  date:        Thu Jan 01 00:00:26 1970 +0000
  | | :  summary:     (26) merge one known; far right
  | | :
  | o :  changeset:   25:91da8ed57247
  | |\:  parent:      21:d42a756af44d
  | | :  parent:      24:a9c19a3d96b7
  | | :  user:        test
  | | :  date:        Thu Jan 01 00:00:25 1970 +0000
  | | :  summary:     (25) merge one known; far left
  | | :
  | o :    changeset:   24:a9c19a3d96b7
  | |\ \   parent:      0:e6eb3150255d
  | | ~ :  parent:      23:a01cddf0766d
  | |   :  user:        test
  | |   :  date:        Thu Jan 01 00:00:24 1970 +0000
  | |   :  summary:     (24) merge one known; immediate right
  | |  /
  | o :    changeset:   23:a01cddf0766d
  | |\ \   parent:      1:6db2ef61d156
  | | ~ :  parent:      22:e0d9cccacb5d
  | |   :  user:        test
  | |   :  date:        Thu Jan 01 00:00:23 1970 +0000
  | |   :  summary:     (23) merge one known; immediate left
  | |  /
  | o :  changeset:   22:e0d9cccacb5d
  |/:/   parent:      18:1aa84d96232a
  | :    parent:      21:d42a756af44d
  | :    user:        test
  | :    date:        Thu Jan 01 00:00:22 1970 +0000
  | :    summary:     (22) merge two known; one far left, one far right
  | :
  | o    changeset:   21:d42a756af44d
  | |\   parent:      19:31ddc2c1573b
  | | |  parent:      20:d30ed6450e32
  | | |  user:        test
  | | |  date:        Thu Jan 01 00:00:21 1970 +0000
  | | |  summary:     (21) expand
  | | |
  +---o  changeset:   20:d30ed6450e32
  | | |  parent:      0:e6eb3150255d
  | | ~  parent:      18:1aa84d96232a
  | |    user:        test
  | |    date:        Thu Jan 01 00:00:20 1970 +0000
  | |    summary:     (20) merge two known; two far right
  | |
  | o    changeset:   19:31ddc2c1573b
  | |\   parent:      15:1dda3f72782d
  | | |  parent:      17:44765d7c06e0
  | | |  user:        test
  | | |  date:        Thu Jan 01 00:00:19 1970 +0000
  | | |  summary:     (19) expand
  | | |
  o | |  changeset:   18:1aa84d96232a
  |\| |  parent:      1:6db2ef61d156
  ~ | |  parent:      15:1dda3f72782d
    | |  user:        test
    | |  date:        Thu Jan 01 00:00:18 1970 +0000
    | |  summary:     (18) merge two known; two far left
   / /
  | o    changeset:   17:44765d7c06e0
  | |\   parent:      12:86b91144a6e9
  | | |  parent:      16:3677d192927d
  | | |  user:        test
  | | |  date:        Thu Jan 01 00:00:17 1970 +0000
  | | |  summary:     (17) expand
  | | |
  | | o    changeset:   16:3677d192927d
  | | |\   parent:      0:e6eb3150255d
  | | ~ ~  parent:      1:6db2ef61d156
  | |      user:        test
  | |      date:        Thu Jan 01 00:00:16 1970 +0000
  | |      summary:     (16) merge two known; one immediate right, one near right
  | |
  o |    changeset:   15:1dda3f72782d
  |\ \   parent:      13:22d8966a97e3
  | | |  parent:      14:8eac370358ef
  | | |  user:        test
  | | |  date:        Thu Jan 01 00:00:15 1970 +0000
  | | |  summary:     (15) expand
  | | |
  | o |  changeset:   14:8eac370358ef
  | |\|  parent:      0:e6eb3150255d
  | ~ |  parent:      12:86b91144a6e9
  |   |  user:        test
  |   |  date:        Thu Jan 01 00:00:14 1970 +0000
  |   |  summary:     (14) merge two known; one immediate right, one far right
  |  /
  o |    changeset:   13:22d8966a97e3
  |\ \   parent:      9:7010c0af0a35
  | | |  parent:      11:832d76e6bdf2
  | | |  user:        test
  | | |  date:        Thu Jan 01 00:00:13 1970 +0000
  | | |  summary:     (13) expand
  | | |
  +---o  changeset:   12:86b91144a6e9
  | | |  parent:      1:6db2ef61d156
  | | ~  parent:      9:7010c0af0a35
  | |    user:        test
  | |    date:        Thu Jan 01 00:00:12 1970 +0000
  | |    summary:     (12) merge two known; one immediate right, one far left
  | |
  | o    changeset:   11:832d76e6bdf2
  | |\   parent:      6:b105a072e251
  | | |  parent:      10:74c64d036d72
  | | |  user:        test
  | | |  date:        Thu Jan 01 00:00:11 1970 +0000
  | | |  summary:     (11) expand
  | | |
  | | o  changeset:   10:74c64d036d72
  | |/|  parent:      0:e6eb3150255d
  | | ~  parent:      6:b105a072e251
  | |    user:        test
  | |    date:        Thu Jan 01 00:00:10 1970 +0000
  | |    summary:     (10) merge two known; one immediate left, one near right
  | |
  o |    changeset:   9:7010c0af0a35
  |\ \   parent:      7:b632bb1b1224
  | | |  parent:      8:7a0b11f71937
  | | |  user:        test
  | | |  date:        Thu Jan 01 00:00:09 1970 +0000
  | | |  summary:     (9) expand
  | | |
  | o |  changeset:   8:7a0b11f71937
  |/| |  parent:      0:e6eb3150255d
  | ~ |  parent:      7:b632bb1b1224
  |   |  user:        test
  |   |  date:        Thu Jan 01 00:00:08 1970 +0000
  |   |  summary:     (8) merge two known; one immediate left, one far right
  |  /
  o |    changeset:   7:b632bb1b1224
  |\ \   parent:      2:3d9a33b8d1e1
  | ~ |  parent:      5:4409d547b708
  |   |  user:        test
  |   |  date:        Thu Jan 01 00:00:07 1970 +0000
  |   |  summary:     (7) expand
  |  /
  | o  changeset:   6:b105a072e251
  |/|  parent:      2:3d9a33b8d1e1
  | ~  parent:      5:4409d547b708
  |    user:        test
  |    date:        Thu Jan 01 00:00:06 1970 +0000
  |    summary:     (6) merge two known; one immediate left, one far left
  |
  o    changeset:   5:4409d547b708
  |\   parent:      3:27eef8ed80b4
  | ~  parent:      4:26a8bac39d9f
  |    user:        test
  |    date:        Thu Jan 01 00:00:05 1970 +0000
  |    summary:     (5) expand
  |
  o    changeset:   4:26a8bac39d9f
  |\   parent:      1:6db2ef61d156
  ~ ~  parent:      3:27eef8ed80b4
       user:        test
       date:        Thu Jan 01 00:00:04 1970 +0000
       summary:     (4) merge two known; one immediate left, one immediate right
  

Setting HGPLAIN ignores graphmod styling:

  $ HGPLAIN=1 hg log -G -r 'file("a")' -m
  @  changeset:   36:08a19a744424
  |  branch:      branch
  |  tag:         tip
  |  parent:      35:9159c3644c5e
  |  parent:      35:9159c3644c5e
  |  user:        test
  |  date:        Thu Jan 01 00:00:36 1970 +0000
  |  summary:     (36) buggy merge: identical parents
  |
  o    changeset:   32:d06dffa21a31
  |\   parent:      27:886ed638191b
  | |  parent:      31:621d83e11f67
  | |  user:        test
  | |  date:        Thu Jan 01 00:00:32 1970 +0000
  | |  summary:     (32) expand
  | |
  o |  changeset:   31:621d83e11f67
  |\|  parent:      21:d42a756af44d
  | |  parent:      30:6e11cd4b648f
  | |  user:        test
  | |  date:        Thu Jan 01 00:00:31 1970 +0000
  | |  summary:     (31) expand
  | |
  o |    changeset:   30:6e11cd4b648f
  |\ \   parent:      28:44ecd0b9ae99
  | | |  parent:      29:cd9bb2be7593
  | | |  user:        test
  | | |  date:        Thu Jan 01 00:00:30 1970 +0000
  | | |  summary:     (30) expand
  | | |
  o | |    changeset:   28:44ecd0b9ae99
  |\ \ \   parent:      1:6db2ef61d156
  | | | |  parent:      26:7f25b6c2f0b9
  | | | |  user:        test
  | | | |  date:        Thu Jan 01 00:00:28 1970 +0000
  | | | |  summary:     (28) merge zero known
  | | | |
  o | | |    changeset:   26:7f25b6c2f0b9
  |\ \ \ \   parent:      18:1aa84d96232a
  | | | | |  parent:      25:91da8ed57247
  | | | | |  user:        test
  | | | | |  date:        Thu Jan 01 00:00:26 1970 +0000
  | | | | |  summary:     (26) merge one known; far right
  | | | | |
  | o-----+  changeset:   25:91da8ed57247
  | | | | |  parent:      21:d42a756af44d
  | | | | |  parent:      24:a9c19a3d96b7
  | | | | |  user:        test
  | | | | |  date:        Thu Jan 01 00:00:25 1970 +0000
  | | | | |  summary:     (25) merge one known; far left
  | | | | |
  | o | | |    changeset:   24:a9c19a3d96b7
  | |\ \ \ \   parent:      0:e6eb3150255d
  | | | | | |  parent:      23:a01cddf0766d
  | | | | | |  user:        test
  | | | | | |  date:        Thu Jan 01 00:00:24 1970 +0000
  | | | | | |  summary:     (24) merge one known; immediate right
  | | | | | |
  | o---+ | |  changeset:   23:a01cddf0766d
  | | | | | |  parent:      1:6db2ef61d156
  | | | | | |  parent:      22:e0d9cccacb5d
  | | | | | |  user:        test
  | | | | | |  date:        Thu Jan 01 00:00:23 1970 +0000
  | | | | | |  summary:     (23) merge one known; immediate left
  | | | | | |
  | o-------+  changeset:   22:e0d9cccacb5d
  | | | | | |  parent:      18:1aa84d96232a
  |/ / / / /   parent:      21:d42a756af44d
  | | | | |    user:        test
  | | | | |    date:        Thu Jan 01 00:00:22 1970 +0000
  | | | | |    summary:     (22) merge two known; one far left, one far right
  | | | | |
  | | | | o    changeset:   21:d42a756af44d
  | | | | |\   parent:      19:31ddc2c1573b
  | | | | | |  parent:      20:d30ed6450e32
  | | | | | |  user:        test
  | | | | | |  date:        Thu Jan 01 00:00:21 1970 +0000
  | | | | | |  summary:     (21) expand
  | | | | | |
  +-+-------o  changeset:   20:d30ed6450e32
  | | | | |    parent:      0:e6eb3150255d
  | | | | |    parent:      18:1aa84d96232a
  | | | | |    user:        test
  | | | | |    date:        Thu Jan 01 00:00:20 1970 +0000
  | | | | |    summary:     (20) merge two known; two far right
  | | | | |
  | | | | o    changeset:   19:31ddc2c1573b
  | | | | |\   parent:      15:1dda3f72782d
  | | | | | |  parent:      17:44765d7c06e0
  | | | | | |  user:        test
  | | | | | |  date:        Thu Jan 01 00:00:19 1970 +0000
  | | | | | |  summary:     (19) expand
  | | | | | |
  o---+---+ |  changeset:   18:1aa84d96232a
    | | | | |  parent:      1:6db2ef61d156
   / / / / /   parent:      15:1dda3f72782d
  | | | | |    user:        test
  | | | | |    date:        Thu Jan 01 00:00:18 1970 +0000
  | | | | |    summary:     (18) merge two known; two far left
  | | | | |
  | | | | o    changeset:   17:44765d7c06e0
  | | | | |\   parent:      12:86b91144a6e9
  | | | | | |  parent:      16:3677d192927d
  | | | | | |  user:        test
  | | | | | |  date:        Thu Jan 01 00:00:17 1970 +0000
  | | | | | |  summary:     (17) expand
  | | | | | |
  +-+-------o  changeset:   16:3677d192927d
  | | | | |    parent:      0:e6eb3150255d
  | | | | |    parent:      1:6db2ef61d156
  | | | | |    user:        test
  | | | | |    date:        Thu Jan 01 00:00:16 1970 +0000
  | | | | |    summary:     (16) merge two known; one immediate right, one near right
  | | | | |
  | | | o |    changeset:   15:1dda3f72782d
  | | | |\ \   parent:      13:22d8966a97e3
  | | | | | |  parent:      14:8eac370358ef
  | | | | | |  user:        test
  | | | | | |  date:        Thu Jan 01 00:00:15 1970 +0000
  | | | | | |  summary:     (15) expand
  | | | | | |
  +-------o |  changeset:   14:8eac370358ef
  | | | | |/   parent:      0:e6eb3150255d
  | | | | |    parent:      12:86b91144a6e9
  | | | | |    user:        test
  | | | | |    date:        Thu Jan 01 00:00:14 1970 +0000
  | | | | |    summary:     (14) merge two known; one immediate right, one far right
  | | | | |
  | | | o |    changeset:   13:22d8966a97e3
  | | | |\ \   parent:      9:7010c0af0a35
  | | | | | |  parent:      11:832d76e6bdf2
  | | | | | |  user:        test
  | | | | | |  date:        Thu Jan 01 00:00:13 1970 +0000
  | | | | | |  summary:     (13) expand
  | | | | | |
  | +---+---o  changeset:   12:86b91144a6e9
  | | | | |    parent:      1:6db2ef61d156
  | | | | |    parent:      9:7010c0af0a35
  | | | | |    user:        test
  | | | | |    date:        Thu Jan 01 00:00:12 1970 +0000
  | | | | |    summary:     (12) merge two known; one immediate right, one far left
  | | | | |
  | | | | o    changeset:   11:832d76e6bdf2
  | | | | |\   parent:      6:b105a072e251
  | | | | | |  parent:      10:74c64d036d72
  | | | | | |  user:        test
  | | | | | |  date:        Thu Jan 01 00:00:11 1970 +0000
  | | | | | |  summary:     (11) expand
  | | | | | |
  +---------o  changeset:   10:74c64d036d72
  | | | | |/   parent:      0:e6eb3150255d
  | | | | |    parent:      6:b105a072e251
  | | | | |    user:        test
  | | | | |    date:        Thu Jan 01 00:00:10 1970 +0000
  | | | | |    summary:     (10) merge two known; one immediate left, one near right
  | | | | |
  | | | o |    changeset:   9:7010c0af0a35
  | | | |\ \   parent:      7:b632bb1b1224
  | | | | | |  parent:      8:7a0b11f71937
  | | | | | |  user:        test
  | | | | | |  date:        Thu Jan 01 00:00:09 1970 +0000
  | | | | | |  summary:     (9) expand
  | | | | | |
  +-------o |  changeset:   8:7a0b11f71937
  | | | |/ /   parent:      0:e6eb3150255d
  | | | | |    parent:      7:b632bb1b1224
  | | | | |    user:        test
  | | | | |    date:        Thu Jan 01 00:00:08 1970 +0000
  | | | | |    summary:     (8) merge two known; one immediate left, one far right
  | | | | |
  | | | o |    changeset:   7:b632bb1b1224
  | | | |\ \   parent:      2:3d9a33b8d1e1
  | | | | | |  parent:      5:4409d547b708
  | | | | | |  user:        test
  | | | | | |  date:        Thu Jan 01 00:00:07 1970 +0000
  | | | | | |  summary:     (7) expand
  | | | | | |
  | | | +---o  changeset:   6:b105a072e251
  | | | | |/   parent:      2:3d9a33b8d1e1
  | | | | |    parent:      5:4409d547b708
  | | | | |    user:        test
  | | | | |    date:        Thu Jan 01 00:00:06 1970 +0000
  | | | | |    summary:     (6) merge two known; one immediate left, one far left
  | | | | |
  | | | o |    changeset:   5:4409d547b708
  | | | |\ \   parent:      3:27eef8ed80b4
  | | | | | |  parent:      4:26a8bac39d9f
  | | | | | |  user:        test
  | | | | | |  date:        Thu Jan 01 00:00:05 1970 +0000
  | | | | | |  summary:     (5) expand
  | | | | | |
  | +---o | |  changeset:   4:26a8bac39d9f
  | | | |/ /   parent:      1:6db2ef61d156
  | | | | |    parent:      3:27eef8ed80b4
  | | | | |    user:        test
  | | | | |    date:        Thu Jan 01 00:00:04 1970 +0000
  | | | | |    summary:     (4) merge two known; one immediate left, one immediate right
  | | | | |

.. unless HGPLAINEXCEPT=graph is set:

  $ HGPLAIN=1 HGPLAINEXCEPT=graph hg log -G -r 'file("a")' -m
  @  changeset:   36:08a19a744424
  :  branch:      branch
  :  tag:         tip
  :  parent:      35:9159c3644c5e
  :  parent:      35:9159c3644c5e
  :  user:        test
  :  date:        Thu Jan 01 00:00:36 1970 +0000
  :  summary:     (36) buggy merge: identical parents
  :
  o    changeset:   32:d06dffa21a31
  |\   parent:      27:886ed638191b
  | :  parent:      31:621d83e11f67
  | :  user:        test
  | :  date:        Thu Jan 01 00:00:32 1970 +0000
  | :  summary:     (32) expand
  | :
  o :  changeset:   31:621d83e11f67
  |\:  parent:      21:d42a756af44d
  | :  parent:      30:6e11cd4b648f
  | :  user:        test
  | :  date:        Thu Jan 01 00:00:31 1970 +0000
  | :  summary:     (31) expand
  | :
  o :    changeset:   30:6e11cd4b648f
  |\ \   parent:      28:44ecd0b9ae99
  | ~ :  parent:      29:cd9bb2be7593
  |   :  user:        test
  |   :  date:        Thu Jan 01 00:00:30 1970 +0000
  |   :  summary:     (30) expand
  |  /
  o :    changeset:   28:44ecd0b9ae99
  |\ \   parent:      1:6db2ef61d156
  | ~ :  parent:      26:7f25b6c2f0b9
  |   :  user:        test
  |   :  date:        Thu Jan 01 00:00:28 1970 +0000
  |   :  summary:     (28) merge zero known
  |  /
  o :    changeset:   26:7f25b6c2f0b9
  |\ \   parent:      18:1aa84d96232a
  | | :  parent:      25:91da8ed57247
  | | :  user:        test
  | | :  date:        Thu Jan 01 00:00:26 1970 +0000
  | | :  summary:     (26) merge one known; far right
  | | :
  | o :  changeset:   25:91da8ed57247
  | |\:  parent:      21:d42a756af44d
  | | :  parent:      24:a9c19a3d96b7
  | | :  user:        test
  | | :  date:        Thu Jan 01 00:00:25 1970 +0000
  | | :  summary:     (25) merge one known; far left
  | | :
  | o :    changeset:   24:a9c19a3d96b7
  | |\ \   parent:      0:e6eb3150255d
  | | ~ :  parent:      23:a01cddf0766d
  | |   :  user:        test
  | |   :  date:        Thu Jan 01 00:00:24 1970 +0000
  | |   :  summary:     (24) merge one known; immediate right
  | |  /
  | o :    changeset:   23:a01cddf0766d
  | |\ \   parent:      1:6db2ef61d156
  | | ~ :  parent:      22:e0d9cccacb5d
  | |   :  user:        test
  | |   :  date:        Thu Jan 01 00:00:23 1970 +0000
  | |   :  summary:     (23) merge one known; immediate left
  | |  /
  | o :  changeset:   22:e0d9cccacb5d
  |/:/   parent:      18:1aa84d96232a
  | :    parent:      21:d42a756af44d
  | :    user:        test
  | :    date:        Thu Jan 01 00:00:22 1970 +0000
  | :    summary:     (22) merge two known; one far left, one far right
  | :
  | o    changeset:   21:d42a756af44d
  | |\   parent:      19:31ddc2c1573b
  | | |  parent:      20:d30ed6450e32
  | | |  user:        test
  | | |  date:        Thu Jan 01 00:00:21 1970 +0000
  | | |  summary:     (21) expand
  | | |
  +---o  changeset:   20:d30ed6450e32
  | | |  parent:      0:e6eb3150255d
  | | ~  parent:      18:1aa84d96232a
  | |    user:        test
  | |    date:        Thu Jan 01 00:00:20 1970 +0000
  | |    summary:     (20) merge two known; two far right
  | |
  | o    changeset:   19:31ddc2c1573b
  | |\   parent:      15:1dda3f72782d
  | | |  parent:      17:44765d7c06e0
  | | |  user:        test
  | | |  date:        Thu Jan 01 00:00:19 1970 +0000
  | | |  summary:     (19) expand
  | | |
  o | |  changeset:   18:1aa84d96232a
  |\| |  parent:      1:6db2ef61d156
  ~ | |  parent:      15:1dda3f72782d
    | |  user:        test
    | |  date:        Thu Jan 01 00:00:18 1970 +0000
    | |  summary:     (18) merge two known; two far left
   / /
  | o    changeset:   17:44765d7c06e0
  | |\   parent:      12:86b91144a6e9
  | | |  parent:      16:3677d192927d
  | | |  user:        test
  | | |  date:        Thu Jan 01 00:00:17 1970 +0000
  | | |  summary:     (17) expand
  | | |
  | | o    changeset:   16:3677d192927d
  | | |\   parent:      0:e6eb3150255d
  | | ~ ~  parent:      1:6db2ef61d156
  | |      user:        test
  | |      date:        Thu Jan 01 00:00:16 1970 +0000
  | |      summary:     (16) merge two known; one immediate right, one near right
  | |
  o |    changeset:   15:1dda3f72782d
  |\ \   parent:      13:22d8966a97e3
  | | |  parent:      14:8eac370358ef
  | | |  user:        test
  | | |  date:        Thu Jan 01 00:00:15 1970 +0000
  | | |  summary:     (15) expand
  | | |
  | o |  changeset:   14:8eac370358ef
  | |\|  parent:      0:e6eb3150255d
  | ~ |  parent:      12:86b91144a6e9
  |   |  user:        test
  |   |  date:        Thu Jan 01 00:00:14 1970 +0000
  |   |  summary:     (14) merge two known; one immediate right, one far right
  |  /
  o |    changeset:   13:22d8966a97e3
  |\ \   parent:      9:7010c0af0a35
  | | |  parent:      11:832d76e6bdf2
  | | |  user:        test
  | | |  date:        Thu Jan 01 00:00:13 1970 +0000
  | | |  summary:     (13) expand
  | | |
  +---o  changeset:   12:86b91144a6e9
  | | |  parent:      1:6db2ef61d156
  | | ~  parent:      9:7010c0af0a35
  | |    user:        test
  | |    date:        Thu Jan 01 00:00:12 1970 +0000
  | |    summary:     (12) merge two known; one immediate right, one far left
  | |
  | o    changeset:   11:832d76e6bdf2
  | |\   parent:      6:b105a072e251
  | | |  parent:      10:74c64d036d72
  | | |  user:        test
  | | |  date:        Thu Jan 01 00:00:11 1970 +0000
  | | |  summary:     (11) expand
  | | |
  | | o  changeset:   10:74c64d036d72
  | |/|  parent:      0:e6eb3150255d
  | | ~  parent:      6:b105a072e251
  | |    user:        test
  | |    date:        Thu Jan 01 00:00:10 1970 +0000
  | |    summary:     (10) merge two known; one immediate left, one near right
  | |
  o |    changeset:   9:7010c0af0a35
  |\ \   parent:      7:b632bb1b1224
  | | |  parent:      8:7a0b11f71937
  | | |  user:        test
  | | |  date:        Thu Jan 01 00:00:09 1970 +0000
  | | |  summary:     (9) expand
  | | |
  | o |  changeset:   8:7a0b11f71937
  |/| |  parent:      0:e6eb3150255d
  | ~ |  parent:      7:b632bb1b1224
  |   |  user:        test
  |   |  date:        Thu Jan 01 00:00:08 1970 +0000
  |   |  summary:     (8) merge two known; one immediate left, one far right
  |  /
  o |    changeset:   7:b632bb1b1224
  |\ \   parent:      2:3d9a33b8d1e1
  | ~ |  parent:      5:4409d547b708
  |   |  user:        test
  |   |  date:        Thu Jan 01 00:00:07 1970 +0000
  |   |  summary:     (7) expand
  |  /
  | o  changeset:   6:b105a072e251
  |/|  parent:      2:3d9a33b8d1e1
  | ~  parent:      5:4409d547b708
  |    user:        test
  |    date:        Thu Jan 01 00:00:06 1970 +0000
  |    summary:     (6) merge two known; one immediate left, one far left
  |
  o    changeset:   5:4409d547b708
  |\   parent:      3:27eef8ed80b4
  | ~  parent:      4:26a8bac39d9f
  |    user:        test
  |    date:        Thu Jan 01 00:00:05 1970 +0000
  |    summary:     (5) expand
  |
  o    changeset:   4:26a8bac39d9f
  |\   parent:      1:6db2ef61d156
  ~ ~  parent:      3:27eef8ed80b4
       user:        test
       date:        Thu Jan 01 00:00:04 1970 +0000
       summary:     (4) merge two known; one immediate left, one immediate right
  
Previously, one could specify graphstyle.grandparent = <N><char> to draw <char>
on only the last N lines (for positive N) or everything but the first N lines
(for negative N), with the rest of the edge using the parent edge styling.

This was removed, and this test now shows that muliple characters being
specified in graphstyle.grandparent aren't treated specially (including in width
calculations; there's no specific reason to *avoid* handling the width
calculations, but it's difficult to do correctly and efficiently).

  $ cat << EOF >> $HGRCPATH
  > [experimental]
  > graphstyle.parent = !
  > graphstyle.grandparent = 3.
  > graphstyle.missing =
  > EOF
  $ hg log -G -r '36:18 & file("a")' -m
  @  changeset:   36:08a19a744424
  3.  branch:      branch
  3.  tag:         tip
  3.  parent:      35:9159c3644c5e
  3.  parent:      35:9159c3644c5e
  3.  user:        test
  3.  date:        Thu Jan 01 00:00:36 1970 +0000
  3.  summary:     (36) buggy merge: identical parents
  3.
  o    changeset:   32:d06dffa21a31
  !\   parent:      27:886ed638191b
  ! 3.  parent:      31:621d83e11f67
  ! 3.  user:        test
  ! 3.  date:        Thu Jan 01 00:00:32 1970 +0000
  ! 3.  summary:     (32) expand
  ! 3.
  o 3.  changeset:   31:621d83e11f67
  !\3.  parent:      21:d42a756af44d
  ! 3.  parent:      30:6e11cd4b648f
  ! 3.  user:        test
  ! 3.  date:        Thu Jan 01 00:00:31 1970 +0000
  ! 3.  summary:     (31) expand
  ! 3.
  o 3.   changeset:   30:6e11cd4b648f
  !\ \   parent:      28:44ecd0b9ae99
  ! ~ 3.  parent:      29:cd9bb2be7593
  !   3.  user:        test
  !   3.  date:        Thu Jan 01 00:00:30 1970 +0000
  !   3.  summary:     (30) expand
  !  /
  o 3.   changeset:   28:44ecd0b9ae99
  !\ \   parent:      1:6db2ef61d156
  ! ~ 3.  parent:      26:7f25b6c2f0b9
  !   3.  user:        test
  !   3.  date:        Thu Jan 01 00:00:28 1970 +0000
  !   3.  summary:     (28) merge zero known
  !  /
  o 3.   changeset:   26:7f25b6c2f0b9
  !\ \   parent:      18:1aa84d96232a
  ! ! 3.  parent:      25:91da8ed57247
  ! ! 3.  user:        test
  ! ! 3.  date:        Thu Jan 01 00:00:26 1970 +0000
  ! ! 3.  summary:     (26) merge one known; far right
  ! ! 3.
  ! o 3.  changeset:   25:91da8ed57247
  ! !\3.  parent:      21:d42a756af44d
  ! ! 3.  parent:      24:a9c19a3d96b7
  ! ! 3.  user:        test
  ! ! 3.  date:        Thu Jan 01 00:00:25 1970 +0000
  ! ! 3.  summary:     (25) merge one known; far left
  ! ! 3.
  ! o 3.   changeset:   24:a9c19a3d96b7
  ! !\ \   parent:      0:e6eb3150255d
  ! ! ~ 3.  parent:      23:a01cddf0766d
  ! !   3.  user:        test
  ! !   3.  date:        Thu Jan 01 00:00:24 1970 +0000
  ! !   3.  summary:     (24) merge one known; immediate right
  ! !  /
  ! o 3.   changeset:   23:a01cddf0766d
  ! !\ \   parent:      1:6db2ef61d156
  ! ! ~ 3.  parent:      22:e0d9cccacb5d
  ! !   3.  user:        test
  ! !   3.  date:        Thu Jan 01 00:00:23 1970 +0000
  ! !   3.  summary:     (23) merge one known; immediate left
  ! !  /
  ! o 3.  changeset:   22:e0d9cccacb5d
  !/3./  parent:      18:1aa84d96232a
  ! 3.   parent:      21:d42a756af44d
  ! 3.   user:        test
  ! 3.   date:        Thu Jan 01 00:00:22 1970 +0000
  ! 3.   summary:     (22) merge two known; one far left, one far right
  ! 3.
  ! o    changeset:   21:d42a756af44d
  ! !\   parent:      19:31ddc2c1573b
  ! ! !  parent:      20:d30ed6450e32
  ! ! !  user:        test
  ! ! !  date:        Thu Jan 01 00:00:21 1970 +0000
  ! ! !  summary:     (21) expand
  ! ! !
  +---o  changeset:   20:d30ed6450e32
  ! ! |  parent:      0:e6eb3150255d
  ! ! ~  parent:      18:1aa84d96232a
  ! !    user:        test
  ! !    date:        Thu Jan 01 00:00:20 1970 +0000
  ! !    summary:     (20) merge two known; two far right
  ! !
  ! o    changeset:   19:31ddc2c1573b
  ! |\   parent:      15:1dda3f72782d
  ! ~ ~  parent:      17:44765d7c06e0
  !      user:        test
  !      date:        Thu Jan 01 00:00:19 1970 +0000
  !      summary:     (19) expand
  !
  o    changeset:   18:1aa84d96232a
  |\   parent:      1:6db2ef61d156
  ~ ~  parent:      15:1dda3f72782d
       user:        test
       date:        Thu Jan 01 00:00:18 1970 +0000
       summary:     (18) merge two known; two far left
  
(This formerly tested "All but the first 3 lines", but is now showing that it's
still not treated any differently):

  $ cat << EOF >> $HGRCPATH
  > [experimental]
  > graphstyle.parent = !
  > graphstyle.grandparent = -3.
  > graphstyle.missing =
  > EOF
  $ hg log -G -r '36:18 & file("a")' -m
  @  changeset:   36:08a19a744424
  -3.  branch:      branch
  -3.  tag:         tip
  -3.  parent:      35:9159c3644c5e
  -3.  parent:      35:9159c3644c5e
  -3.  user:        test
  -3.  date:        Thu Jan 01 00:00:36 1970 +0000
  -3.  summary:     (36) buggy merge: identical parents
  -3.
  o    changeset:   32:d06dffa21a31
  !\   parent:      27:886ed638191b
  ! -3.  parent:      31:621d83e11f67
  ! -3.  user:        test
  ! -3.  date:        Thu Jan 01 00:00:32 1970 +0000
  ! -3.  summary:     (32) expand
  ! -3.
  o -3.  changeset:   31:621d83e11f67
  !\-3.  parent:      21:d42a756af44d
  ! -3.  parent:      30:6e11cd4b648f
  ! -3.  user:        test
  ! -3.  date:        Thu Jan 01 00:00:31 1970 +0000
  ! -3.  summary:     (31) expand
  ! -3.
  o -3.  changeset:   30:6e11cd4b648f
  !\ \   parent:      28:44ecd0b9ae99
  ! ~ -3.  parent:      29:cd9bb2be7593
  !   -3.  user:        test
  !   -3.  date:        Thu Jan 01 00:00:30 1970 +0000
  !   -3.  summary:     (30) expand
  !  /
  o -3.  changeset:   28:44ecd0b9ae99
  !\ \   parent:      1:6db2ef61d156
  ! ~ -3.  parent:      26:7f25b6c2f0b9
  !   -3.  user:        test
  !   -3.  date:        Thu Jan 01 00:00:28 1970 +0000
  !   -3.  summary:     (28) merge zero known
  !  /
  o -3.  changeset:   26:7f25b6c2f0b9
  !\ \   parent:      18:1aa84d96232a
  ! ! -3.  parent:      25:91da8ed57247
  ! ! -3.  user:        test
  ! ! -3.  date:        Thu Jan 01 00:00:26 1970 +0000
  ! ! -3.  summary:     (26) merge one known; far right
  ! ! -3.
  ! o -3.  changeset:   25:91da8ed57247
  ! !\-3.  parent:      21:d42a756af44d
  ! ! -3.  parent:      24:a9c19a3d96b7
  ! ! -3.  user:        test
  ! ! -3.  date:        Thu Jan 01 00:00:25 1970 +0000
  ! ! -3.  summary:     (25) merge one known; far left
  ! ! -3.
  ! o -3.  changeset:   24:a9c19a3d96b7
  ! !\ \   parent:      0:e6eb3150255d
  ! ! ~ -3.  parent:      23:a01cddf0766d
  ! !   -3.  user:        test
  ! !   -3.  date:        Thu Jan 01 00:00:24 1970 +0000
  ! !   -3.  summary:     (24) merge one known; immediate right
  ! !  /
  ! o -3.  changeset:   23:a01cddf0766d
  ! !\ \   parent:      1:6db2ef61d156
  ! ! ~ -3.  parent:      22:e0d9cccacb5d
  ! !   -3.  user:        test
  ! !   -3.  date:        Thu Jan 01 00:00:23 1970 +0000
  ! !   -3.  summary:     (23) merge one known; immediate left
  ! !  /
  ! o -3.  changeset:   22:e0d9cccacb5d
  !/-3./  parent:      18:1aa84d96232a
  ! -3.  parent:      21:d42a756af44d
  ! -3.  user:        test
  ! -3.  date:        Thu Jan 01 00:00:22 1970 +0000
  ! -3.  summary:     (22) merge two known; one far left, one far right
  ! -3.
  ! o    changeset:   21:d42a756af44d
  ! !\   parent:      19:31ddc2c1573b
  ! ! !  parent:      20:d30ed6450e32
  ! ! !  user:        test
  ! ! !  date:        Thu Jan 01 00:00:21 1970 +0000
  ! ! !  summary:     (21) expand
  ! ! !
  +---o  changeset:   20:d30ed6450e32
  ! ! |  parent:      0:e6eb3150255d
  ! ! ~  parent:      18:1aa84d96232a
  ! !    user:        test
  ! !    date:        Thu Jan 01 00:00:20 1970 +0000
  ! !    summary:     (20) merge two known; two far right
  ! !
  ! o    changeset:   19:31ddc2c1573b
  ! |\   parent:      15:1dda3f72782d
  ! ~ ~  parent:      17:44765d7c06e0
  !      user:        test
  !      date:        Thu Jan 01 00:00:19 1970 +0000
  !      summary:     (19) expand
  !
  o    changeset:   18:1aa84d96232a
  |\   parent:      1:6db2ef61d156
  ~ ~  parent:      15:1dda3f72782d
       user:        test
       date:        Thu Jan 01 00:00:18 1970 +0000
       summary:     (18) merge two known; two far left
  
  $ cd ..

Change graph shorten, test better with graphstyle.missing not none

  $ cd repo
  $ cat << EOF >> $HGRCPATH
  > [experimental]
  > graphstyle.parent = |
  > graphstyle.grandparent = :
  > graphstyle.missing = '
  > graphshorten = true
  > EOF
  $ hg log -G -r 'file("a")' -m -T '{rev} {desc}'
  @  36 (36) buggy merge: identical parents
  o    32 (32) expand
  |\
  o :  31 (31) expand
  |\:
  o :    30 (30) expand
  |\ \
  o \ \    28 (28) merge zero known
  |\ \ \
  o \ \ \    26 (26) merge one known; far right
  |\ \ \ \
  | o-----+  25 (25) merge one known; far left
  | o ' ' :    24 (24) merge one known; immediate right
  | |\ \ \ \
  | o---+ ' :  23 (23) merge one known; immediate left
  | o-------+  22 (22) merge two known; one far left, one far right
  |/ / / / /
  | ' ' ' o    21 (21) expand
  | ' ' ' |\
  +-+-------o  20 (20) merge two known; two far right
  | ' ' ' o    19 (19) expand
  | ' ' ' |\
  o---+---+ |  18 (18) merge two known; two far left
   / / / / /
  ' ' ' | o    17 (17) expand
  ' ' ' | |\
  +-+-------o  16 (16) merge two known; one immediate right, one near right
  ' ' ' o |    15 (15) expand
  ' ' ' |\ \
  +-------o |  14 (14) merge two known; one immediate right, one far right
  ' ' ' | |/
  ' ' ' o |    13 (13) expand
  ' ' ' |\ \
  ' +---+---o  12 (12) merge two known; one immediate right, one far left
  ' ' ' | o    11 (11) expand
  ' ' ' | |\
  +---------o  10 (10) merge two known; one immediate left, one near right
  ' ' ' | |/
  ' ' ' o |    9 (9) expand
  ' ' ' |\ \
  +-------o |  8 (8) merge two known; one immediate left, one far right
  ' ' ' |/ /
  ' ' ' o |    7 (7) expand
  ' ' ' |\ \
  ' ' ' +---o  6 (6) merge two known; one immediate left, one far left
  ' ' ' | '/
  ' ' ' o '    5 (5) expand
  ' ' ' |\ \
  ' +---o ' '  4 (4) merge two known; one immediate left, one immediate right
  ' ' ' '/ /

behavior with newlines

  $ hg log -G -r ::2 -T '{rev} {desc}'
  o  2 (2) collapse
  o  1 (1) collapse
  o  0 (0) root

  $ hg log -G -r ::2 -T '{rev} {desc}\n'
  o  2 (2) collapse
  o  1 (1) collapse
  o  0 (0) root

  $ hg log -G -r ::2 -T '{rev} {desc}\n\n'
  o  2 (2) collapse
  |
  o  1 (1) collapse
  |
  o  0 (0) root
  

  $ hg log -G -r ::2 -T '\n{rev} {desc}'
  o
  |  2 (2) collapse
  o
  |  1 (1) collapse
  o
     0 (0) root

  $ hg log -G -r ::2 -T '{rev} {desc}\n\n\n'
  o  2 (2) collapse
  |
  |
  o  1 (1) collapse
  |
  |
  o  0 (0) root
  
  
  $ cd ..

When inserting extra line nodes to handle more than 2 parents, ensure that
the right node styles are used (issue5174):

  $ hg init repo-issue5174
  $ cd repo-issue5174
  $ echo a > f0
  $ hg ci -Aqm 0
  $ echo a > f1
  $ hg ci -Aqm 1
  $ echo a > f2
  $ hg ci -Aqm 2
  $ hg co ".^"
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ echo a > f3
  $ hg ci -Aqm 3
  $ hg co ".^^"
  0 files updated, 0 files merged, 2 files removed, 0 files unresolved
  $ echo a > f4
  $ hg ci -Aqm 4
  $ hg merge -r 2
  2 files updated, 0 files merged, 0 files removed, 0 files unresolved
  (branch merge, don't forget to commit)
  $ hg ci -qm 5
  $ hg merge -r 3
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  (branch merge, don't forget to commit)
  $ hg ci -qm 6
  $ hg log -G -r '0 | 1 | 2 | 6'
  @    changeset:   6:851fe89689ad
  :\   tag:         tip
  : :  parent:      5:4f1e3cf15f5d
  : :  parent:      3:b74ba7084d2d
  : :  user:        test
  : :  date:        Thu Jan 01 00:00:00 1970 +0000
  : :  summary:     6
  : :
  : \
  : :\
  : o :  changeset:   2:3e6599df4cce
  : :/   user:        test
  : :    date:        Thu Jan 01 00:00:00 1970 +0000
  : :    summary:     2
  : :
  : o  changeset:   1:bd9a55143933
  :/   user:        test
  :    date:        Thu Jan 01 00:00:00 1970 +0000
  :    summary:     1
  :
  o  changeset:   0:870a5edc339c
     user:        test
     date:        Thu Jan 01 00:00:00 1970 +0000
     summary:     0
  

  $ cd ..

Multiple roots (issue5440):

  $ hg init multiroots
  $ cd multiroots
  $ cat <<EOF > .hg/hgrc
  > [command-templates]
  > log = '{rev} {desc}\n\n'
  > EOF

  $ touch foo
  $ hg ci -Aqm foo
  $ hg co -q null
  $ touch bar
  $ hg ci -Aqm bar

  $ hg log -Gr null:
  @  1 bar
  |
  | o  0 foo
  |/
  o  -1
  
  $ hg log -Gr null+0
  o  0 foo
  |
  o  -1
  
  $ hg log -Gr null+1
  @  1 bar
  |
  o  -1
  

  $ cd ..