view tests/test-glog.t @ 40326:fed697fa1734

sqlitestore: file storage backend using SQLite

This commit provides an extension which uses SQLite to store file
data (as opposed to revlogs).

As the inline documentation describes, there are still several
aspects to the extension that are incomplete. But it's a start.
The extension does support basic clone, checkout, and commit
workflows, which makes it suitable for simple use cases.

One notable missing feature is support for "bundlerepos." This is
probably responsible for the most test failures when the extension
is activated as part of the test suite.

All revision data is stored in SQLite. Data is stored as zstd
compressed chunks (default if zstd is available), zlib compressed
chunks (default if zstd is not available), or raw chunks (if
configured or if a compressed delta is not smaller than the raw
delta). This makes things very similar to revlogs.

Unlike revlogs, the extension doesn't yet enforce a limit on delta
chain length. This is an obvious limitation and should be addressed.
This is somewhat mitigated by the use of zstd, which is much faster
than zlib to decompress.

There is a dedicated table for storing deltas. Deltas are stored
by the SHA-1 hash of their uncompressed content. The "fileindex" table
has columns that reference the delta for each revision and the base
delta that delta should be applied against. A recursive SQL query
is used to resolve the delta chain along with the delta data.

By storing deltas by hash, we are able to de-duplicate delta storage!
With revlogs, the same deltas in different revlogs would result in
duplicate storage of that delta. In this scheme, inserting the
duplicate delta is a no-op and delta chains simply reference the
existing delta.

When initially implementing this extension, I did not have
content-indexed deltas and deltas could be duplicated across files
(just like revlogs). When I implemented content-indexed deltas, the
size of the SQLite database for a full clone of mozilla-unified
dropped:

before: 2,554,261,504 bytes
after:  2,488,754,176 bytes

Surprisingly, this is still larger than the bytes size of revlog
files:

revlog files: 2,104,861,230 bytes
du -b:        2,254,381,614

I would have expected storage to be smaller since we're not limiting
delta chain length and since we're using zstd instead of zlib. I
suspect the SQLite indexes and per-column overhead account for the
bulk of the differences. (Keep in mind that revlog uses a 64-byte
packed struct for revision index data and deltas are stored without
padding. Aside from the 12 unused bytes in the 32 byte node field,
revlogs are pretty efficient.) Another source of overhead is file
name storage. With revlogs, file names are stored in the filesystem.
But with SQLite, we need to store file names in the database. This is
roughly equivalent to the size of the fncache file, which for the
mozilla-unified repository is ~34MB.

Since the SQLite database isn't append-only and since delta chains
can reference any delta, this opens some interesting possibilities.
For example, we could store deltas in reverse, such that fulltexts
are stored for newer revisions and deltas are applied to reconstruct
older revisions. This is likely a more optimal storage strategy for
version control, as new data tends to be more frequently accessed
than old data. We would obviously need wire protocol support for
transferring revision data from newest to oldest. And we would
probably need some kind of mechanism for "re-encoding" stores. But
it should be doable.

This extension is very much experimental quality. There are a handful
of features that don't work. It probably isn't suitable for day-to-day
use. But it could be used in limited cases (e.g. read-only checkouts
like in CI). And it is also a good proving ground for alternate
storage backends. As we continue to define interfaces for all things
storage, it will be useful to have a viable alternate storage backend
to see how things shake out in practice.

test-storage.py passes on Python 2 and introduces no new test failures on
Python 3. Having the storage-level unit tests has proved to be insanely
useful when developing this extension. Those tests caught numerous bugs
during development and I'm convinced this style of testing is the way
forward for ensuring alternate storage backends work as intended. Of
course, test coverage isn't close to what it needs to be. But it is
a start. And what coverage we have gives me confidence that basic store
functionality is implemented properly.

Differential Revision: https://phab.mercurial-scm.org/D4928

@  (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 'test'))
      (func
        (symbol 'user')
        (string 'not-a-user'))))
  <filteredset
    <spanset- 0:37>,
    <addset
      <filteredset
        <fullreposet+ 0:37>,
        <user 'test'>>,
      <filteredset
        <fullreposet+ 0:37>,
        <user '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 'default'))
      (or
        (list
          (func
            (symbol 'branch')
            (string 'branch'))
          (func
            (symbol 'branch')
            (string 'branch'))))))
  <filteredset
    <spanset- 0:37>,
    <addset
      <filteredset
        <fullreposet+ 0:37>,
        <branch 'default'>>,
      <addset
        <filteredset
          <fullreposet+ 0:37>,
          <branch 'branch'>>,
        <filteredset
          <fullreposet+ 0:37>,
          <branch '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'
  [255]
  $ 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:fc281d8ff18d
  |\   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 fc281d8ff18d
  |/
  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 fc281d8ff18d999ad6497b3d27390bcd695dcc73
  # Parent  99b31f1c2782e2deb1723cef08930f70fc84b37b
  # Parent  17d952250a9d03cc3dc77b199ab60e959b9b0260
  merge 5 and 4
  
  diff -r 99b31f1c2782 -r fc281d8ff18d 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 fc281d8ff18d 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 02dbb8e276b8ab7abfd07cab50c901647e75c2dd
  # Parent  fc281d8ff18d999ad6497b3d27390bcd695dcc73
  Added tag foo-bar for changeset fc281d8ff18d
  
  diff -r fc281d8ff18d -r 02dbb8e276b8 .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 @@
  +fc281d8ff18d999ad6497b3d27390bcd695dcc73 foo-bar
  # HG changeset patch
  # User test
  # Date 0 0
  #      Thu Jan 01 00:00:00 1970 +0000
  # Node ID 24c2e826ddebf80f9dcd60b856bdb8e6715c5449
  # Parent  fc281d8ff18d999ad6497b3d27390bcd695dcc73
  add g
  
  diff -r fc281d8ff18d -r 24c2e826ddeb 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`
  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 fc281d8ff18d
  |
  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 ui.graphnodetemplate='"{rev}"'
  7  7:02dbb8e276b8
  |
  6    6:fc281d8ff18d
  |\
  | ~
  5  5:99b31f1c2782
  |
  ~

node template with changesettemplater (shared cache variable):

  $ hg log -Gr 5:7 -T '{latesttag % "{rev} {tag}+{distance}"}\n' \
  > --config ui.graphnodetemplate='{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 ui.graphnodetemplate='{label("branch.{branch}", rev)}'
  [branch.default|7]  [log.node|7:02dbb8e276b8]
  |
  ~

  $ 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
  
Draw only part of a grandparent line differently with "<N><char>"; only the
last N lines (for positive N) or everything but the first N lines (for
negative N) along the current node use the style, the rest of the edge uses
the parent edge styling.

Last 3 lines:

  $ cat << EOF >> $HGRCPATH
  > [experimental]
  > graphstyle.parent = !
  > graphstyle.grandparent = 3.
  > graphstyle.missing =
  > EOF
  $ hg log -G -r '36:18 & 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
  
All but the first 3 lines:

  $ cat << EOF >> $HGRCPATH
  > [experimental]
  > graphstyle.parent = !
  > graphstyle.grandparent = -3.
  > graphstyle.missing =
  > EOF
  $ hg log -G -r '36:18 & 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
  
  $ 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
  > [ui]
  > logtemplate = '{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 ..