view tests/test-log.t @ 17616:9535a0dc41f2

store: implement fncache basic path encoding in C

(This is not yet enabled; it will be turned on in a followup patch.)

The path encoding performed by fncache is complex and (perhaps
surprisingly) slow enough to negatively affect the overall performance
of Mercurial.

For a short path (< 120 bytes), the Python code can be reduced to a fairly
tractable state machine that either determines that nothing needs to be
done in a single pass, or performs the encoding in a second pass.

For longer paths, we avoid the more complicated hashed encoding scheme
for now, and fall back to Python.

Raw performance: I measured in a repo containing 150,000 files in its tip
manifest, with a median path name length of 57 bytes, and 95th percentile
of 96 bytes.

In this repo, the Python code takes 3.1 seconds to encode all path
names, while the hybrid C-and-Python code (called from Python) takes
0.21 seconds, for a speedup of about 14.

Across several other large repositories, I've measured the speedup from
the C code at between 26x and 40x.

For path names above 120 bytes where we must fall back to Python for
hashed encoding, the speedup is about 1.7x.  Thus absolute performance
will depend strongly on the characteristics of a particular repository.

The g is crafted to have 2 filelog topological heads in a linear
changeset graph

  $ hg init a
  $ cd a
  $ echo a > a
  $ echo f > f
  $ hg ci -Ama -d '1 0'
  adding a
  adding f

  $ hg cp a b
  $ hg cp f g
  $ hg ci -mb -d '2 0'

  $ mkdir dir
  $ hg mv b dir
  $ echo g >> g
  $ echo f >> f
  $ hg ci -mc -d '3 0'

  $ hg mv a b
  $ hg cp -f f g
  $ echo a > d
  $ hg add d
  $ hg ci -md -d '4 0'

  $ hg mv dir/b e
  $ hg ci -me -d '5 0'

  $ hg log a
  changeset:   0:9161b9aeaf16
  user:        test
  date:        Thu Jan 01 00:00:01 1970 +0000
  summary:     a
  

-f, directory

  $ hg log -f dir
  abort: cannot follow file not in parent revision: "dir"
  [255]

-f, but no args

  $ hg log -f
  changeset:   4:7e4639b4691b
  tag:         tip
  user:        test
  date:        Thu Jan 01 00:00:05 1970 +0000
  summary:     e
  
  changeset:   3:2ca5ba701980
  user:        test
  date:        Thu Jan 01 00:00:04 1970 +0000
  summary:     d
  
  changeset:   2:f8954cd4dc1f
  user:        test
  date:        Thu Jan 01 00:00:03 1970 +0000
  summary:     c
  
  changeset:   1:d89b0a12d229
  user:        test
  date:        Thu Jan 01 00:00:02 1970 +0000
  summary:     b
  
  changeset:   0:9161b9aeaf16
  user:        test
  date:        Thu Jan 01 00:00:01 1970 +0000
  summary:     a
  

one rename

  $ hg up -q 2
  $ hg log -vf a
  changeset:   0:9161b9aeaf16
  user:        test
  date:        Thu Jan 01 00:00:01 1970 +0000
  files:       a f
  description:
  a
  
  

many renames

  $ hg up -q tip
  $ hg log -vf e
  changeset:   4:7e4639b4691b
  tag:         tip
  user:        test
  date:        Thu Jan 01 00:00:05 1970 +0000
  files:       dir/b e
  description:
  e
  
  
  changeset:   2:f8954cd4dc1f
  user:        test
  date:        Thu Jan 01 00:00:03 1970 +0000
  files:       b dir/b f g
  description:
  c
  
  
  changeset:   1:d89b0a12d229
  user:        test
  date:        Thu Jan 01 00:00:02 1970 +0000
  files:       b g
  description:
  b
  
  
  changeset:   0:9161b9aeaf16
  user:        test
  date:        Thu Jan 01 00:00:01 1970 +0000
  files:       a f
  description:
  a
  
  


log -pf dir/b

  $ hg up -q 3
  $ hg log -pf dir/b
  changeset:   2:f8954cd4dc1f
  user:        test
  date:        Thu Jan 01 00:00:03 1970 +0000
  summary:     c
  
  diff -r d89b0a12d229 -r f8954cd4dc1f dir/b
  --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
  +++ b/dir/b	Thu Jan 01 00:00:03 1970 +0000
  @@ -0,0 +1,1 @@
  +a
  
  changeset:   1:d89b0a12d229
  user:        test
  date:        Thu Jan 01 00:00:02 1970 +0000
  summary:     b
  
  diff -r 9161b9aeaf16 -r d89b0a12d229 b
  --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
  +++ b/b	Thu Jan 01 00:00:02 1970 +0000
  @@ -0,0 +1,1 @@
  +a
  
  changeset:   0:9161b9aeaf16
  user:        test
  date:        Thu Jan 01 00:00:01 1970 +0000
  summary:     a
  
  diff -r 000000000000 -r 9161b9aeaf16 a
  --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
  +++ b/a	Thu Jan 01 00:00:01 1970 +0000
  @@ -0,0 +1,1 @@
  +a
  

log -vf dir/b

  $ hg log -vf dir/b
  changeset:   2:f8954cd4dc1f
  user:        test
  date:        Thu Jan 01 00:00:03 1970 +0000
  files:       b dir/b f g
  description:
  c
  
  
  changeset:   1:d89b0a12d229
  user:        test
  date:        Thu Jan 01 00:00:02 1970 +0000
  files:       b g
  description:
  b
  
  
  changeset:   0:9161b9aeaf16
  user:        test
  date:        Thu Jan 01 00:00:01 1970 +0000
  files:       a f
  description:
  a
  
  


-f and multiple filelog heads

  $ hg up -q 2
  $ hg log -f g --template '{rev}\n'
  2
  1
  0
  $ hg up -q tip
  $ hg log -f g --template '{rev}\n'
  3
  2
  0


log copies with --copies

  $ hg log -vC --template '{rev} {file_copies}\n'
  4 e (dir/b)
  3 b (a)g (f)
  2 dir/b (b)
  1 b (a)g (f)
  0 

log copies switch without --copies, with old filecopy template

  $ hg log -v --template '{rev} {file_copies_switch%filecopy}\n'
  4 
  3 
  2 
  1 
  0 

log copies switch with --copies

  $ hg log -vC --template '{rev} {file_copies_switch}\n'
  4 e (dir/b)
  3 b (a)g (f)
  2 dir/b (b)
  1 b (a)g (f)
  0 


log copies with hardcoded style and with --style=default

  $ hg log -vC -r4
  changeset:   4:7e4639b4691b
  tag:         tip
  user:        test
  date:        Thu Jan 01 00:00:05 1970 +0000
  files:       dir/b e
  copies:      e (dir/b)
  description:
  e
  
  
  $ hg log -vC -r4 --style=default
  changeset:   4:7e4639b4691b
  tag:         tip
  user:        test
  date:        Thu Jan 01 00:00:05 1970 +0000
  files:       dir/b e
  copies:      e (dir/b)
  description:
  e
  
  


log copies, non-linear manifest

  $ hg up -C 3
  1 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ hg mv dir/b e
  $ echo foo > foo
  $ hg ci -Ame2 -d '6 0'
  adding foo
  created new head
  $ hg log -v --template '{rev} {file_copies}\n' -r 5
  5 e (dir/b)


log copies, execute bit set

#if execbit
  $ chmod +x e
  $ hg ci -me3 -d '7 0'
  $ hg log -v --template '{rev} {file_copies}\n' -r 6
  6 
#endif


log -p d

  $ hg log -pv d
  changeset:   3:2ca5ba701980
  user:        test
  date:        Thu Jan 01 00:00:04 1970 +0000
  files:       a b d g
  description:
  d
  
  
  diff -r f8954cd4dc1f -r 2ca5ba701980 d
  --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
  +++ b/d	Thu Jan 01 00:00:04 1970 +0000
  @@ -0,0 +1,1 @@
  +a
  


log --removed file

  $ hg log --removed -v a
  changeset:   3:2ca5ba701980
  user:        test
  date:        Thu Jan 01 00:00:04 1970 +0000
  files:       a b d g
  description:
  d
  
  
  changeset:   0:9161b9aeaf16
  user:        test
  date:        Thu Jan 01 00:00:01 1970 +0000
  files:       a f
  description:
  a
  
  

log --removed revrange file

  $ hg log --removed -v -r0:2 a
  changeset:   0:9161b9aeaf16
  user:        test
  date:        Thu Jan 01 00:00:01 1970 +0000
  files:       a f
  description:
  a
  
  
  $ cd ..

log --follow tests

  $ hg init follow
  $ cd follow

  $ echo base > base
  $ hg ci -Ambase -d '1 0'
  adding base

  $ echo r1 >> base
  $ hg ci -Amr1 -d '1 0'
  $ echo r2 >> base
  $ hg ci -Amr2 -d '1 0'

  $ hg up -C 1
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ echo b1 > b1
  $ hg ci -Amb1 -d '1 0'
  adding b1
  created new head


log -f

  $ hg log -f
  changeset:   3:e62f78d544b4
  tag:         tip
  parent:      1:3d5bf5654eda
  user:        test
  date:        Thu Jan 01 00:00:01 1970 +0000
  summary:     b1
  
  changeset:   1:3d5bf5654eda
  user:        test
  date:        Thu Jan 01 00:00:01 1970 +0000
  summary:     r1
  
  changeset:   0:67e992f2c4f3
  user:        test
  date:        Thu Jan 01 00:00:01 1970 +0000
  summary:     base
  


log -f -r 1:tip

  $ hg up -C 0
  1 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ echo b2 > b2
  $ hg ci -Amb2 -d '1 0'
  adding b2
  created new head
  $ hg log -f -r 1:tip
  changeset:   1:3d5bf5654eda
  user:        test
  date:        Thu Jan 01 00:00:01 1970 +0000
  summary:     r1
  
  changeset:   2:60c670bf5b30
  user:        test
  date:        Thu Jan 01 00:00:01 1970 +0000
  summary:     r2
  
  changeset:   3:e62f78d544b4
  parent:      1:3d5bf5654eda
  user:        test
  date:        Thu Jan 01 00:00:01 1970 +0000
  summary:     b1
  


log -r .  with two parents

  $ hg up -C 3
  2 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ hg merge tip
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  (branch merge, don't forget to commit)
  $ hg log -r .
  changeset:   3:e62f78d544b4
  parent:      1:3d5bf5654eda
  user:        test
  date:        Thu Jan 01 00:00:01 1970 +0000
  summary:     b1
  


log -r .  with one parent

  $ hg ci -mm12 -d '1 0'
  $ hg log -r .
  changeset:   5:302e9dd6890d
  tag:         tip
  parent:      3:e62f78d544b4
  parent:      4:ddb82e70d1a1
  user:        test
  date:        Thu Jan 01 00:00:01 1970 +0000
  summary:     m12
  

  $ echo postm >> b1
  $ hg ci -Amb1.1 -d'1 0'


log --follow-first

  $ hg log --follow-first
  changeset:   6:2404bbcab562
  tag:         tip
  user:        test
  date:        Thu Jan 01 00:00:01 1970 +0000
  summary:     b1.1
  
  changeset:   5:302e9dd6890d
  parent:      3:e62f78d544b4
  parent:      4:ddb82e70d1a1
  user:        test
  date:        Thu Jan 01 00:00:01 1970 +0000
  summary:     m12
  
  changeset:   3:e62f78d544b4
  parent:      1:3d5bf5654eda
  user:        test
  date:        Thu Jan 01 00:00:01 1970 +0000
  summary:     b1
  
  changeset:   1:3d5bf5654eda
  user:        test
  date:        Thu Jan 01 00:00:01 1970 +0000
  summary:     r1
  
  changeset:   0:67e992f2c4f3
  user:        test
  date:        Thu Jan 01 00:00:01 1970 +0000
  summary:     base
  


log -P 2

  $ hg log -P 2
  changeset:   6:2404bbcab562
  tag:         tip
  user:        test
  date:        Thu Jan 01 00:00:01 1970 +0000
  summary:     b1.1
  
  changeset:   5:302e9dd6890d
  parent:      3:e62f78d544b4
  parent:      4:ddb82e70d1a1
  user:        test
  date:        Thu Jan 01 00:00:01 1970 +0000
  summary:     m12
  
  changeset:   4:ddb82e70d1a1
  parent:      0:67e992f2c4f3
  user:        test
  date:        Thu Jan 01 00:00:01 1970 +0000
  summary:     b2
  
  changeset:   3:e62f78d544b4
  parent:      1:3d5bf5654eda
  user:        test
  date:        Thu Jan 01 00:00:01 1970 +0000
  summary:     b1
  


log -r tip -p --git

  $ hg log -r tip -p --git
  changeset:   6:2404bbcab562
  tag:         tip
  user:        test
  date:        Thu Jan 01 00:00:01 1970 +0000
  summary:     b1.1
  
  diff --git a/b1 b/b1
  --- a/b1
  +++ b/b1
  @@ -1,1 +1,2 @@
   b1
  +postm
  


log -r ""

  $ hg log -r ''
  hg: parse error: empty query
  [255]

log -r <some unknown node id>

  $ hg log -r 1000000000000000000000000000000000000000
  abort: unknown revision '1000000000000000000000000000000000000000'!
  [255]

log -k r1

  $ hg log -k r1
  changeset:   1:3d5bf5654eda
  user:        test
  date:        Thu Jan 01 00:00:01 1970 +0000
  summary:     r1
  
log -p -l2 --color=always

  $ hg --config extensions.color= --config color.mode=ansi \
  >  log -p -l2 --color=always
  \x1b[0;33mchangeset:   6:2404bbcab562\x1b[0m (esc)
  tag:         tip
  user:        test
  date:        Thu Jan 01 00:00:01 1970 +0000
  summary:     b1.1
  
  \x1b[0;1mdiff -r 302e9dd6890d -r 2404bbcab562 b1\x1b[0m (esc)
  \x1b[0;31;1m--- a/b1	Thu Jan 01 00:00:01 1970 +0000\x1b[0m (esc)
  \x1b[0;32;1m+++ b/b1	Thu Jan 01 00:00:01 1970 +0000\x1b[0m (esc)
  \x1b[0;35m@@ -1,1 +1,2 @@\x1b[0m (esc)
   b1
  \x1b[0;32m+postm\x1b[0m (esc)
  
  \x1b[0;33mchangeset:   5:302e9dd6890d\x1b[0m (esc)
  parent:      3:e62f78d544b4
  parent:      4:ddb82e70d1a1
  user:        test
  date:        Thu Jan 01 00:00:01 1970 +0000
  summary:     m12
  
  \x1b[0;1mdiff -r e62f78d544b4 -r 302e9dd6890d b2\x1b[0m (esc)
  \x1b[0;31;1m--- /dev/null	Thu Jan 01 00:00:00 1970 +0000\x1b[0m (esc)
  \x1b[0;32;1m+++ b/b2	Thu Jan 01 00:00:01 1970 +0000\x1b[0m (esc)
  \x1b[0;35m@@ -0,0 +1,1 @@\x1b[0m (esc)
  \x1b[0;32m+b2\x1b[0m (esc)
  


log -r tip --stat

  $ hg log -r tip --stat
  changeset:   6:2404bbcab562
  tag:         tip
  user:        test
  date:        Thu Jan 01 00:00:01 1970 +0000
  summary:     b1.1
  
   b1 |  1 +
   1 files changed, 1 insertions(+), 0 deletions(-)
  

  $ cd ..


User

  $ hg init usertest
  $ cd usertest

  $ echo a > a
  $ hg ci -A -m "a" -u "User One <[e-mail]>"
  adding a
  $ echo b > b
  $ hg ci -A -m "b" -u "User Two <[e-mail]>"
  adding b

  $ hg log -u "User One <[e-mail]>"
  changeset:   0:29a4c94f1924
  user:        User One <[e-mail]>
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     a
  
  $ hg log -u "user1" -u "user2"
  changeset:   1:e834b5e69c0e
  tag:         tip
  user:        User Two <[e-mail]>
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     b
  
  changeset:   0:29a4c94f1924
  user:        User One <[e-mail]>
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     a
  
  $ hg log -u "user3"

  $ cd ..

  $ hg init branches
  $ cd branches

  $ echo a > a
  $ hg ci -A -m "commit on default"
  adding a
  $ hg branch test
  marked working directory as branch test
  (branches are permanent and global, did you want a bookmark?)
  $ echo b > b
  $ hg ci -A -m "commit on test"
  adding b

  $ hg up default
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ echo c > c
  $ hg ci -A -m "commit on default"
  adding c
  $ hg up test
  1 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ echo c > c
  $ hg ci -A -m "commit on test"
  adding c


log -b default

  $ hg log -b default
  changeset:   2:c3a4f03cc9a7
  parent:      0:24427303d56f
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     commit on default
  
  changeset:   0:24427303d56f
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     commit on default
  


log -b test

  $ hg log -b test
  changeset:   3:f5d8de11c2e2
  branch:      test
  tag:         tip
  parent:      1:d32277701ccb
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     commit on test
  
  changeset:   1:d32277701ccb
  branch:      test
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     commit on test
  


log -b dummy

  $ hg log -b dummy
  abort: unknown revision 'dummy'!
  [255]


log -b .

  $ hg log -b .
  changeset:   3:f5d8de11c2e2
  branch:      test
  tag:         tip
  parent:      1:d32277701ccb
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     commit on test
  
  changeset:   1:d32277701ccb
  branch:      test
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     commit on test
  


log -b default -b test

  $ hg log -b default -b test
  changeset:   3:f5d8de11c2e2
  branch:      test
  tag:         tip
  parent:      1:d32277701ccb
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     commit on test
  
  changeset:   2:c3a4f03cc9a7
  parent:      0:24427303d56f
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     commit on default
  
  changeset:   1:d32277701ccb
  branch:      test
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     commit on test
  
  changeset:   0:24427303d56f
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     commit on default
  


log -b default -b .

  $ hg log -b default -b .
  changeset:   3:f5d8de11c2e2
  branch:      test
  tag:         tip
  parent:      1:d32277701ccb
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     commit on test
  
  changeset:   2:c3a4f03cc9a7
  parent:      0:24427303d56f
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     commit on default
  
  changeset:   1:d32277701ccb
  branch:      test
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     commit on test
  
  changeset:   0:24427303d56f
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     commit on default
  


log -b . -b test

  $ hg log -b . -b test
  changeset:   3:f5d8de11c2e2
  branch:      test
  tag:         tip
  parent:      1:d32277701ccb
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     commit on test
  
  changeset:   1:d32277701ccb
  branch:      test
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     commit on test
  


log -b 2

  $ hg log -b 2
  changeset:   2:c3a4f03cc9a7
  parent:      0:24427303d56f
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     commit on default
  
  changeset:   0:24427303d56f
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     commit on default
  


log -p --cwd dir (in subdir)

  $ mkdir dir
  $ hg log -p --cwd dir
  changeset:   3:f5d8de11c2e2
  branch:      test
  tag:         tip
  parent:      1:d32277701ccb
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     commit on test
  
  diff -r d32277701ccb -r f5d8de11c2e2 c
  --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
  +++ b/c	Thu Jan 01 00:00:00 1970 +0000
  @@ -0,0 +1,1 @@
  +c
  
  changeset:   2:c3a4f03cc9a7
  parent:      0:24427303d56f
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     commit on default
  
  diff -r 24427303d56f -r c3a4f03cc9a7 c
  --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
  +++ b/c	Thu Jan 01 00:00:00 1970 +0000
  @@ -0,0 +1,1 @@
  +c
  
  changeset:   1:d32277701ccb
  branch:      test
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     commit on test
  
  diff -r 24427303d56f -r d32277701ccb b
  --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
  +++ b/b	Thu Jan 01 00:00:00 1970 +0000
  @@ -0,0 +1,1 @@
  +b
  
  changeset:   0:24427303d56f
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     commit on default
  
  diff -r 000000000000 -r 24427303d56f 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
  


log -p -R repo

  $ cd dir
  $ hg log -p -R .. ../a
  changeset:   0:24427303d56f
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     commit on default
  
  diff -r 000000000000 -r 24427303d56f 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
  

  $ cd ../..

  $ hg init follow2
  $ cd follow2

# Build the following history:
# tip - o - x - o - x - x
#    \                 /
#     o - o - o - x
#      \     /
#         o
#
# Where "o" is a revision containing "foo" and
# "x" is a revision without "foo"

  $ touch init
  $ hg ci -A -m "init, unrelated"
  adding init
  $ echo 'foo' > init
  $ hg ci -m "change, unrelated"
  $ echo 'foo' > foo
  $ hg ci -A -m "add unrelated old foo"
  adding foo
  $ hg rm foo
  $ hg ci -m "delete foo, unrelated"
  $ echo 'related' > foo
  $ hg ci -A -m "add foo, related"
  adding foo

  $ hg up 0
  1 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ touch branch
  $ hg ci -A -m "first branch, unrelated"
  adding branch
  created new head
  $ touch foo
  $ hg ci -A -m "create foo, related"
  adding foo
  $ echo 'change' > foo
  $ hg ci -m "change foo, related"

  $ hg up 6
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ echo 'change foo in branch' > foo
  $ hg ci -m "change foo in branch, related"
  created new head
  $ hg merge 7
  merging foo
  warning: conflicts during merge.
  merging foo incomplete! (edit conflicts, then use 'hg resolve --mark')
  0 files updated, 0 files merged, 0 files removed, 1 files unresolved
  use 'hg resolve' to retry unresolved file merges or 'hg update -C .' to abandon
  [1]
  $ echo 'merge 1' > foo
  $ hg resolve -m foo
  $ hg ci -m "First merge, related"

  $ hg merge 4
  merging foo
  warning: conflicts during merge.
  merging foo incomplete! (edit conflicts, then use 'hg resolve --mark')
  1 files updated, 0 files merged, 0 files removed, 1 files unresolved
  use 'hg resolve' to retry unresolved file merges or 'hg update -C .' to abandon
  [1]
  $ echo 'merge 2' > foo
  $ hg resolve -m foo
  $ hg ci -m "Last merge, related"

  $ hg log --graph
  @    changeset:   10:4dae8563d2c5
  |\   tag:         tip
  | |  parent:      9:7b35701b003e
  | |  parent:      4:88176d361b69
  | |  user:        test
  | |  date:        Thu Jan 01 00:00:00 1970 +0000
  | |  summary:     Last merge, related
  | |
  | o    changeset:   9:7b35701b003e
  | |\   parent:      8:e5416ad8a855
  | | |  parent:      7:87fe3144dcfa
  | | |  user:        test
  | | |  date:        Thu Jan 01 00:00:00 1970 +0000
  | | |  summary:     First merge, related
  | | |
  | | o  changeset:   8:e5416ad8a855
  | | |  parent:      6:dc6c325fe5ee
  | | |  user:        test
  | | |  date:        Thu Jan 01 00:00:00 1970 +0000
  | | |  summary:     change foo in branch, related
  | | |
  | o |  changeset:   7:87fe3144dcfa
  | |/   user:        test
  | |    date:        Thu Jan 01 00:00:00 1970 +0000
  | |    summary:     change foo, related
  | |
  | o  changeset:   6:dc6c325fe5ee
  | |  user:        test
  | |  date:        Thu Jan 01 00:00:00 1970 +0000
  | |  summary:     create foo, related
  | |
  | o  changeset:   5:73db34516eb9
  | |  parent:      0:e87515fd044a
  | |  user:        test
  | |  date:        Thu Jan 01 00:00:00 1970 +0000
  | |  summary:     first branch, unrelated
  | |
  o |  changeset:   4:88176d361b69
  | |  user:        test
  | |  date:        Thu Jan 01 00:00:00 1970 +0000
  | |  summary:     add foo, related
  | |
  o |  changeset:   3:dd78ae4afb56
  | |  user:        test
  | |  date:        Thu Jan 01 00:00:00 1970 +0000
  | |  summary:     delete foo, unrelated
  | |
  o |  changeset:   2:c4c64aedf0f7
  | |  user:        test
  | |  date:        Thu Jan 01 00:00:00 1970 +0000
  | |  summary:     add unrelated old foo
  | |
  o |  changeset:   1:e5faa7440653
  |/   user:        test
  |    date:        Thu Jan 01 00:00:00 1970 +0000
  |    summary:     change, unrelated
  |
  o  changeset:   0:e87515fd044a
     user:        test
     date:        Thu Jan 01 00:00:00 1970 +0000
     summary:     init, unrelated
  

  $ hg --traceback log -f foo
  changeset:   10:4dae8563d2c5
  tag:         tip
  parent:      9:7b35701b003e
  parent:      4:88176d361b69
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     Last merge, related
  
  changeset:   9:7b35701b003e
  parent:      8:e5416ad8a855
  parent:      7:87fe3144dcfa
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     First merge, related
  
  changeset:   8:e5416ad8a855
  parent:      6:dc6c325fe5ee
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     change foo in branch, related
  
  changeset:   7:87fe3144dcfa
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     change foo, related
  
  changeset:   6:dc6c325fe5ee
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     create foo, related
  
  changeset:   4:88176d361b69
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     add foo, related
  

Also check when maxrev < lastrevfilelog

  $ hg --traceback log -f -r4 foo
  changeset:   4:88176d361b69
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     add foo, related
  
  $ cd ..

Issue2383: hg log showing _less_ differences than hg diff

  $ hg init issue2383
  $ cd issue2383

Create a test repo:

  $ echo a > a
  $ hg ci -Am0
  adding a
  $ echo b > b
  $ hg ci -Am1
  adding b
  $ hg co 0
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ echo b > a
  $ hg ci -m2
  created new head

Merge:

  $ hg merge
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  (branch merge, don't forget to commit)

Make sure there's a file listed in the merge to trigger the bug:

  $ echo c > a
  $ hg ci -m3

Two files shown here in diff:

  $ hg diff --rev 2:3
  diff -r b09be438c43a -r 8e07aafe1edc a
  --- a/a	Thu Jan 01 00:00:00 1970 +0000
  +++ b/a	Thu Jan 01 00:00:00 1970 +0000
  @@ -1,1 +1,1 @@
  -b
  +c
  diff -r b09be438c43a -r 8e07aafe1edc b
  --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
  +++ b/b	Thu Jan 01 00:00:00 1970 +0000
  @@ -0,0 +1,1 @@
  +b

Diff here should be the same:

  $ hg log -vpr 3
  changeset:   3:8e07aafe1edc
  tag:         tip
  parent:      2:b09be438c43a
  parent:      1:925d80f479bb
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  files:       a
  description:
  3
  
  
  diff -r b09be438c43a -r 8e07aafe1edc a
  --- a/a	Thu Jan 01 00:00:00 1970 +0000
  +++ b/a	Thu Jan 01 00:00:00 1970 +0000
  @@ -1,1 +1,1 @@
  -b
  +c
  diff -r b09be438c43a -r 8e07aafe1edc b
  --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
  +++ b/b	Thu Jan 01 00:00:00 1970 +0000
  @@ -0,0 +1,1 @@
  +b
  
  $ cd ..

'hg log -r rev fn' when last(filelog(fn)) != rev

  $ hg init simplelog
  $ cd simplelog
  $ echo f > a
  $ hg ci -Am'a' -d '0 0'
  adding a
  $ echo f >> a
  $ hg ci -Am'a bis' -d '1 0'

  $ hg log -r0 a
  changeset:   0:9f758d63dcde
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     a
  
  $ cat > $HGTMP/testhidden.py << EOF
  > def reposetup(ui, repo):
  >     for line in repo.opener('hidden'):
  >         ctx = repo[line.strip()]
  >         repo.hiddenrevs.add(ctx.rev())
  > EOF
  $ echo '[extensions]' >> $HGRCPATH
  $ echo "hidden=$HGTMP/testhidden.py" >> $HGRCPATH
  $ touch .hg/hidden
  $ hg log --template='{rev}:{node}\n'
  1:a765632148dc55d38c35c4f247c618701886cb2f
  0:9f758d63dcde62d547ebfb08e1e7ee96535f2b05
  $ echo a765632148dc55d38c35c4f247c618701886cb2f > .hg/hidden
  $ hg log --template='{rev}:{node}\n'
  0:9f758d63dcde62d547ebfb08e1e7ee96535f2b05
  $ hg log --template='{rev}:{node}\n' --hidden
  1:a765632148dc55d38c35c4f247c618701886cb2f
  0:9f758d63dcde62d547ebfb08e1e7ee96535f2b05

clear extensions configuration
  $ echo '[extensions]' >> $HGRCPATH
  $ echo "hidden=!" >> $HGRCPATH
  $ cd ..

test -u/-k for problematic encoding
# unicode: cp932:
# u30A2    0x83 0x41(= 'A')
# u30C2    0x83 0x61(= 'a')

  $ hg init problematicencoding
  $ cd problematicencoding

  $ python > setup.sh <<EOF
  > print u'''
  > echo a > text
  > hg add text
  > hg --encoding utf-8 commit -u '\u30A2' -m none
  > echo b > text
  > hg --encoding utf-8 commit -u '\u30C2' -m none
  > echo c > text
  > hg --encoding utf-8 commit -u none -m '\u30A2'
  > echo d > text
  > hg --encoding utf-8 commit -u none -m '\u30C2'
  > '''.encode('utf-8')
  > EOF
  $ sh < setup.sh

test in problematic encoding
  $ python > test.sh <<EOF
  > print u'''
  > hg --encoding cp932 log --template '{rev}\\n' -u '\u30A2'
  > echo ====
  > hg --encoding cp932 log --template '{rev}\\n' -u '\u30C2'
  > echo ====
  > hg --encoding cp932 log --template '{rev}\\n' -k '\u30A2'
  > echo ====
  > hg --encoding cp932 log --template '{rev}\\n' -k '\u30C2'
  > '''.encode('cp932')
  > EOF
  $ sh < test.sh
  0
  ====
  1
  ====
  2
  0
  ====
  3
  1

  $ cd ..