comparison tests/test-glog.t @ 42307:264a2cbb25d0

graphmod: remove support for graph lines mixing parent/grandparent styles (BC)

Currently, if the configuration for a graph edge draw style has multiple bytes
(at least on python2), it is interpreted as "this is a request to draw the line
partially in the style of the parent, partially in the style of the
grandparent". This precludes the configuration handling unicode characters
(which trigger the `len > 1` check, at least on python2), and I believe was part
of the reason that beautifygraph was written the way it was.

Talking with the person who implemented this, it appears to have been to achieve
feature parity with the rendering of the smartlog extension. I suspect that this
isn't actually used outside of that situation, so I think that we can remove it
without much issue.

This will make it so that multi-character edges are possible, and render any
existing configuration that uses this feature with these multiple characters.
This is *not* going to adjust the width of everything to make it line up
correctly, please see the test that's being modified in this changeset for an
example of how the previous configuration now renders.

Note also that the previous configuration seems to have been broken, or at least
it was behaving in a really non-obvious way - it was avoiding the grandparent
character(s) when it should have been displaying them! This is why so many "!"
characters changed to "3."; I don't know if this was intentional.

Differential Revision: https://phab.mercurial-scm.org/D5112

42306:181583d30539

  ~ ~  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

  ~ ~  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

42307:264a2cbb25d0

  ~ ~  parent:      3:27eef8ed80b4
       user:        test
       date:        Thu Jan 01 00:00:04 1970 +0000
       summary:     (4) merge two known; one immediate left, one immediate right
  
Previously, one could specify graphstyle.grandparent = <N><char> to draw <char>
on only the last N lines (for positive N) or everything but the first N lines
(for negative N), with the rest of the edge using the parent edge styling.

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

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

  ~ ~  parent:      15:1dda3f72782d
       user:        test
       date:        Thu Jan 01 00:00:18 1970 +0000
       summary:     (18) merge two known; two far left
  
(This formerly tested "All but the first 3 lines", but is now showing that it's
still not treated any differently):

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