view tests/test-merge-tools.t @ 42044:bb271ec2fbfb

compression: introduce a `storage.revlog.zstd.level` configuration

This option control the zstd compression level used when compressing revlog
chunk. The usage of zstd for revlog compression has not graduated from
experimental yet, but we intend to fix that soon.

The option name for the compression level is more straight forward to pick, so
this changesets comes first.  Having a dedicated option for each compression
engine is useful because they don't support the same range of values.

I ran the same measurement as for the zlib compression level (in the parent
changesets). The variation in repository size is stay mostly in the same (small)
range. The "read/write" performance see smallish variation, but are overall much
better than zlib. Write performance show the same tend of having better write
performance for when reaching high-end compression.

Again, we don't intend to change the default zstd compression level (currently:
3) in this series. However this is worth investigating in the future.

The Performance comparison of zlib vs zstd is quite impressive. The repository
size stay in the same range, but the performance are much better in all
situations.

Comparison summary
==================

We are looking at:
- performance range for zlib
- performance range for zstd
- comparison of default zstd (level-3) to default zlib (level 6)
- comparison of the slowest zstd time to the fastest zlib time

Read performance:
-----------------
          |           zlib          |           zstd          | cmp | f2s
mercurial |   0.170159 -   0.189219 |   0.144127 -   0.149624 | 80% | 88%
pypy      |   2.679217 -   2.768691 |   1.532317 -   1.705044 | 60% | 63%
netbeans  | 122.477027 - 141.620281 |  72.996346 -  89.731560 | 58% | 73%
mozilla   | 147.867662 - 170.572118 |  91.700995 - 105.853099 | 56% | 71%

Write performance:
------------------
          |           zlib          |           zstd          | cmp | f2s
mercurial |  53.250304 - 56.2936129 |  40.877025 -  45.677286 | 75% | 86%
pypy      | 460.721984 - 476.589918 | 270.545409 - 301.002219 | 63% | 65%
netbeans  | 520.560316 - 715.930400 | 370.356311 - 428.329652 | 55% | 82%
mozilla   | 739.803002 - 987.056093 | 505.152906 - 591.930683 | 57% | 80%

Raw data
--------

repo      alg lvl  .hg/store size  00manifest.d read       write

mercurial zlib  1      49,402,813     5,963,475   0.170159  53.250304
mercurial zlib  6      47,197,397     5,875,730   0.182820  56.264320
mercurial zlib  9      47,121,596     5,849,781   0.189219  56.293612

mercurial zstd  1      49,737,084     5,966,355   0.144127  40.877025
mercurial zstd  3      48,961,867     5,895,208   0.146376  42.268142
mercurial zstd  5      48,200,592     5,938,676   0.149624  43.162875
mercurial zstd 10      47,833,520     5,913,353   0.145185  44.012489
mercurial zstd 15      47,314,604     5,728,679   0.147686  45.677286
mercurial zstd 20      47,330,502     5,830,539   0.145789  45.025407
mercurial zstd 22      47,330,076     5,830,539   0.143996  44.690460


pypy      zlib  1     370,830,572    28,462,425   2.679217 460.721984
pypy      zlib  6     340,112,317    27,648,747   2.768691 467.537158
pypy      zlib  9     338,360,736    27,639,003   2.763495 476.589918

pypy      zstd  1     362,377,479    27,916,214   1.532317 270.545409
pypy      zstd  3     354,137,693    27,905,988   1.686718 294.951509
pypy      zstd  5     342,640,043    27,655,774   1.705044 301.002219
pypy      zstd 10     334,224,327    27,164,493   1.567287 285.186239
pypy      zstd 15     329,000,363    26,645,965   1.637729 299.561332
pypy      zstd 20     324,534,039    26,199,547   1.526813 302.149827
pypy      zstd 22     324,530,595    26,198,932   1.525718 307.821218


netbeans  zlib  1   1,281,847,810   165,495,457 122.477027 520.560316
netbeans  zlib  6   1,205,284,353   159,161,207 139.876147 715.930400
netbeans  zlib  9   1,197,135,671   155,034,586 141.620281 678.297064

netbeans  zstd  1   1,259,581,737   160,840,613  72.996346 370.356311
netbeans  zstd  3   1,232,978,122   157,691,551  81.622317 396.733087
netbeans  zstd  5   1,208,034,075   160,246,880  83.080549 364.342626
netbeans  zstd 10   1,188,624,176   156,083,417  79.323935 403.594602
netbeans  zstd 15   1,176,973,589   153,859,477  89.731560 428.329652
netbeans  zstd 20   1,162,958,258   151,147,535  82.842667 392.335349
netbeans  zstd 22   1,162,707,029   151,150,220  82.565695 402.840655


mozilla   zlib  1   2,775,497,186   298,527,987 147.867662 751.263721
mozilla   zlib  6   2,596,856,420   286,597,671 170.572118 987.056093
mozilla   zlib  9   2,587,542,494   287,018,264 163.622338 739.803002

mozilla   zstd  1   2,723,159,348   286,617,532  91.700995 570.042751
mozilla   zstd  3   2,665,055,001   286,152,013  95.240155 561.412805
mozilla   zstd  5   2,607,819,817   288,060,030 101.978048 505.152906
mozilla   zstd 10   2,558,761,085   283,967,648 104.113481 497.771202
mozilla   zstd 15   2,526,216,060   275,581,300 105.853099 591.930683
mozilla   zstd 20   2,485,114,806   266,478,859  95.268795 576.515389
mozilla   zstd 22   2,484,869,080   266,456,505  94.429282 572.785537

test merge-tools configuration - mostly exercising filemerge.py

  $ unset HGMERGE # make sure HGMERGE doesn't interfere with the test
  $ cat >> $HGRCPATH << EOF
  > [ui]
  > merge=
  > EOF
  $ hg init repo
  $ cd repo

revision 0

  $ echo "revision 0" > f
  $ echo "space" >> f
  $ hg commit -Am "revision 0"
  adding f

revision 1

  $ echo "revision 1" > f
  $ echo "space" >> f
  $ hg commit -Am "revision 1"
  $ hg update 0 > /dev/null

revision 2

  $ echo "revision 2" > f
  $ echo "space" >> f
  $ hg commit -Am "revision 2"
  created new head
  $ hg update 0 > /dev/null

revision 3 - simple to merge

  $ echo "revision 3" >> f
  $ hg commit -Am "revision 3"
  created new head

revision 4 - hard to merge

  $ hg update 0 > /dev/null
  $ echo "revision 4" > f
  $ hg commit -Am "revision 4"
  created new head

  $ echo "[merge-tools]" > .hg/hgrc

  $ beforemerge() {
  >   cat .hg/hgrc
  >   echo "# hg update -C 1"
  >   hg update -C 1 > /dev/null
  > }
  $ aftermerge() {
  >   echo "# cat f"
  >   cat f
  >   echo "# hg stat"
  >   hg stat
  >   echo "# hg resolve --list"
  >   hg resolve --list
  >   rm -f f.orig
  > }

Tool selection

default is internal merge:

  $ beforemerge
  [merge-tools]
  # hg update -C 1

hg merge -r 2
override $PATH to ensure hgmerge not visible; use $PYTHON in case we're
running from a devel copy, not a temp installation

  $ PATH="$BINDIR:/usr/sbin" "$PYTHON" "$BINDIR"/hg merge -r 2
  merging f
  warning: conflicts while merging f! (edit, 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 merge --abort' to abandon
  [1]
  $ aftermerge
  # cat f
  <<<<<<< working copy: ef83787e2614 - test: revision 1
  revision 1
  =======
  revision 2
  >>>>>>> merge rev:    0185f4e0cf02 - test: revision 2
  space
  # hg stat
  M f
  ? f.orig
  # hg resolve --list
  U f

simplest hgrc using false for merge:

  $ echo "false.whatever=" >> .hg/hgrc
  $ beforemerge
  [merge-tools]
  false.whatever=
  # hg update -C 1
  $ hg merge -r 2
  merging f
  merging f failed!
  0 files updated, 0 files merged, 0 files removed, 1 files unresolved
  use 'hg resolve' to retry unresolved file merges or 'hg merge --abort' to abandon
  [1]
  $ aftermerge
  # cat f
  revision 1
  space
  # hg stat
  M f
  ? f.orig
  # hg resolve --list
  U f

#if unix-permissions

unexecutable file in $PATH shouldn't be found:

  $ echo "echo fail" > false
  $ hg up -qC 1
  $ PATH="`pwd`:$BINDIR:/usr/sbin" "$PYTHON" "$BINDIR"/hg merge -r 2
  merging f
  warning: conflicts while merging f! (edit, 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 merge --abort' to abandon
  [1]
  $ rm false

#endif

executable directory in $PATH shouldn't be found:

  $ mkdir false
  $ hg up -qC 1
  $ PATH="`pwd`:$BINDIR:/usr/sbin" "$PYTHON" "$BINDIR"/hg merge -r 2
  merging f
  warning: conflicts while merging f! (edit, 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 merge --abort' to abandon
  [1]
  $ rmdir false

true with higher .priority gets precedence:

  $ echo "true.priority=1" >> .hg/hgrc
  $ beforemerge
  [merge-tools]
  false.whatever=
  true.priority=1
  # hg update -C 1
  $ hg merge -r 2
  merging f
  0 files updated, 1 files merged, 0 files removed, 0 files unresolved
  (branch merge, don't forget to commit)
  $ aftermerge
  # cat f
  revision 1
  space
  # hg stat
  M f
  # hg resolve --list
  R f

unless lowered on command line:

  $ beforemerge
  [merge-tools]
  false.whatever=
  true.priority=1
  # hg update -C 1
  $ hg merge -r 2 --config merge-tools.true.priority=-7
  merging f
  merging f failed!
  0 files updated, 0 files merged, 0 files removed, 1 files unresolved
  use 'hg resolve' to retry unresolved file merges or 'hg merge --abort' to abandon
  [1]
  $ aftermerge
  # cat f
  revision 1
  space
  # hg stat
  M f
  ? f.orig
  # hg resolve --list
  U f

or false set higher on command line:

  $ beforemerge
  [merge-tools]
  false.whatever=
  true.priority=1
  # hg update -C 1
  $ hg merge -r 2 --config merge-tools.false.priority=117
  merging f
  merging f failed!
  0 files updated, 0 files merged, 0 files removed, 1 files unresolved
  use 'hg resolve' to retry unresolved file merges or 'hg merge --abort' to abandon
  [1]
  $ aftermerge
  # cat f
  revision 1
  space
  # hg stat
  M f
  ? f.orig
  # hg resolve --list
  U f

or true set to disabled:
  $ beforemerge
  [merge-tools]
  false.whatever=
  true.priority=1
  # hg update -C 1
  $ hg merge -r 2 --config merge-tools.true.disabled=yes
  merging f
  merging f failed!
  0 files updated, 0 files merged, 0 files removed, 1 files unresolved
  use 'hg resolve' to retry unresolved file merges or 'hg merge --abort' to abandon
  [1]
  $ aftermerge
  # cat f
  revision 1
  space
  # hg stat
  M f
  ? f.orig
  # hg resolve --list
  U f

or true.executable not found in PATH:

  $ beforemerge
  [merge-tools]
  false.whatever=
  true.priority=1
  # hg update -C 1
  $ hg merge -r 2 --config merge-tools.true.executable=nonexistentmergetool
  merging f
  merging f failed!
  0 files updated, 0 files merged, 0 files removed, 1 files unresolved
  use 'hg resolve' to retry unresolved file merges or 'hg merge --abort' to abandon
  [1]
  $ aftermerge
  # cat f
  revision 1
  space
  # hg stat
  M f
  ? f.orig
  # hg resolve --list
  U f

or true.executable with bogus path:

  $ beforemerge
  [merge-tools]
  false.whatever=
  true.priority=1
  # hg update -C 1
  $ hg merge -r 2 --config merge-tools.true.executable=/nonexistent/mergetool
  merging f
  merging f failed!
  0 files updated, 0 files merged, 0 files removed, 1 files unresolved
  use 'hg resolve' to retry unresolved file merges or 'hg merge --abort' to abandon
  [1]
  $ aftermerge
  # cat f
  revision 1
  space
  # hg stat
  M f
  ? f.orig
  # hg resolve --list
  U f

but true.executable set to cat found in PATH works:

  $ echo "true.executable=cat" >> .hg/hgrc
  $ beforemerge
  [merge-tools]
  false.whatever=
  true.priority=1
  true.executable=cat
  # hg update -C 1
  $ hg merge -r 2
  merging f
  revision 1
  space
  revision 0
  space
  revision 2
  space
  0 files updated, 1 files merged, 0 files removed, 0 files unresolved
  (branch merge, don't forget to commit)
  $ aftermerge
  # cat f
  revision 1
  space
  # hg stat
  M f
  # hg resolve --list
  R f

and true.executable set to cat with path works:

  $ beforemerge
  [merge-tools]
  false.whatever=
  true.priority=1
  true.executable=cat
  # hg update -C 1
  $ hg merge -r 2 --config merge-tools.true.executable=cat
  merging f
  revision 1
  space
  revision 0
  space
  revision 2
  space
  0 files updated, 1 files merged, 0 files removed, 0 files unresolved
  (branch merge, don't forget to commit)
  $ aftermerge
  # cat f
  revision 1
  space
  # hg stat
  M f
  # hg resolve --list
  R f

executable set to python script that succeeds:

  $ cat > "$TESTTMP/myworkingmerge.py" <<EOF
  > def myworkingmergefn(ui, repo, args, **kwargs):
  >     return False
  > EOF
  $ beforemerge
  [merge-tools]
  false.whatever=
  true.priority=1
  true.executable=cat
  # hg update -C 1
  $ hg merge -r 2 --config merge-tools.true.executable="python:$TESTTMP/myworkingmerge.py:myworkingmergefn"
  merging f
  0 files updated, 1 files merged, 0 files removed, 0 files unresolved
  (branch merge, don't forget to commit)
  $ aftermerge
  # cat f
  revision 1
  space
  # hg stat
  M f
  # hg resolve --list
  R f

executable set to python script that fails:

  $ cat > "$TESTTMP/mybrokenmerge.py" <<EOF
  > def mybrokenmergefn(ui, repo, args, **kwargs):
  >     ui.write(b"some fail message\n")
  >     return True
  > EOF
  $ beforemerge
  [merge-tools]
  false.whatever=
  true.priority=1
  true.executable=cat
  # hg update -C 1
  $ hg merge -r 2 --config merge-tools.true.executable="python:$TESTTMP/mybrokenmerge.py:mybrokenmergefn"
  merging f
  some fail message
  abort: $TESTTMP/mybrokenmerge.py hook failed
  [255]
  $ aftermerge
  # cat f
  revision 1
  space
  # hg stat
  ? f.orig
  # hg resolve --list
  U f

executable set to python script that is missing function:

  $ beforemerge
  [merge-tools]
  false.whatever=
  true.priority=1
  true.executable=cat
  # hg update -C 1
  $ hg merge -r 2 --config merge-tools.true.executable="python:$TESTTMP/myworkingmerge.py:missingFunction"
  merging f
  abort: $TESTTMP/myworkingmerge.py does not have function: missingFunction
  [255]
  $ aftermerge
  # cat f
  revision 1
  space
  # hg stat
  ? f.orig
  # hg resolve --list
  U f

executable set to missing python script:

  $ beforemerge
  [merge-tools]
  false.whatever=
  true.priority=1
  true.executable=cat
  # hg update -C 1
  $ hg merge -r 2 --config merge-tools.true.executable="python:$TESTTMP/missingpythonscript.py:mergefn"
  merging f
  abort: loading python merge script failed: $TESTTMP/missingpythonscript.py
  [255]
  $ aftermerge
  # cat f
  revision 1
  space
  # hg stat
  ? f.orig
  # hg resolve --list
  U f

executable set to python script but callable function is missing:

  $ beforemerge
  [merge-tools]
  false.whatever=
  true.priority=1
  true.executable=cat
  # hg update -C 1
  $ hg merge -r 2 --config merge-tools.true.executable="python:$TESTTMP/myworkingmerge.py"
  abort: invalid 'python:' syntax: python:$TESTTMP/myworkingmerge.py
  [255]
  $ aftermerge
  # cat f
  revision 1
  space
  # hg stat
  # hg resolve --list
  U f

executable set to python script but callable function is empty string:

  $ beforemerge
  [merge-tools]
  false.whatever=
  true.priority=1
  true.executable=cat
  # hg update -C 1
  $ hg merge -r 2 --config merge-tools.true.executable="python:$TESTTMP/myworkingmerge.py:"
  abort: invalid 'python:' syntax: python:$TESTTMP/myworkingmerge.py:
  [255]
  $ aftermerge
  # cat f
  revision 1
  space
  # hg stat
  # hg resolve --list
  U f

executable set to python script but callable function is missing and path contains colon:

  $ beforemerge
  [merge-tools]
  false.whatever=
  true.priority=1
  true.executable=cat
  # hg update -C 1
  $ hg merge -r 2 --config merge-tools.true.executable="python:$TESTTMP/some:dir/myworkingmerge.py"
  abort: invalid 'python:' syntax: python:$TESTTMP/some:dir/myworkingmerge.py
  [255]
  $ aftermerge
  # cat f
  revision 1
  space
  # hg stat
  # hg resolve --list
  U f

executable set to python script filename that contains spaces:

  $ mkdir -p "$TESTTMP/my path"
  $ cat > "$TESTTMP/my path/my working merge with spaces in filename.py" <<EOF
  > def myworkingmergefn(ui, repo, args, **kwargs):
  >     return False
  > EOF
  $ beforemerge
  [merge-tools]
  false.whatever=
  true.priority=1
  true.executable=cat
  # hg update -C 1
  $ hg merge -r 2 --config "merge-tools.true.executable=python:$TESTTMP/my path/my working merge with spaces in filename.py:myworkingmergefn"
  merging f
  0 files updated, 1 files merged, 0 files removed, 0 files unresolved
  (branch merge, don't forget to commit)
  $ aftermerge
  # cat f
  revision 1
  space
  # hg stat
  M f
  # hg resolve --list
  R f

#if unix-permissions

environment variables in true.executable are handled:

  $ echo 'echo "custom merge tool"' > .hg/merge.sh
  $ beforemerge
  [merge-tools]
  false.whatever=
  true.priority=1
  true.executable=cat
  # hg update -C 1
  $ hg --config merge-tools.true.executable='sh' \
  >    --config merge-tools.true.args=.hg/merge.sh \
  >    merge -r 2
  merging f
  custom merge tool
  0 files updated, 1 files merged, 0 files removed, 0 files unresolved
  (branch merge, don't forget to commit)
  $ aftermerge
  # cat f
  revision 1
  space
  # hg stat
  M f
  # hg resolve --list
  R f

#endif

Tool selection and merge-patterns

merge-patterns specifies new tool false:

  $ beforemerge
  [merge-tools]
  false.whatever=
  true.priority=1
  true.executable=cat
  # hg update -C 1
  $ hg merge -r 2 --config merge-patterns.f=false
  merging f
  merging f failed!
  0 files updated, 0 files merged, 0 files removed, 1 files unresolved
  use 'hg resolve' to retry unresolved file merges or 'hg merge --abort' to abandon
  [1]
  $ aftermerge
  # cat f
  revision 1
  space
  # hg stat
  M f
  ? f.orig
  # hg resolve --list
  U f

merge-patterns specifies executable not found in PATH and gets warning:

  $ beforemerge
  [merge-tools]
  false.whatever=
  true.priority=1
  true.executable=cat
  # hg update -C 1
  $ hg merge -r 2 --config merge-patterns.f=true --config merge-tools.true.executable=nonexistentmergetool
  couldn't find merge tool true (for pattern f)
  merging f
  couldn't find merge tool true (for pattern f)
  merging f failed!
  0 files updated, 0 files merged, 0 files removed, 1 files unresolved
  use 'hg resolve' to retry unresolved file merges or 'hg merge --abort' to abandon
  [1]
  $ aftermerge
  # cat f
  revision 1
  space
  # hg stat
  M f
  ? f.orig
  # hg resolve --list
  U f

merge-patterns specifies executable with bogus path and gets warning:

  $ beforemerge
  [merge-tools]
  false.whatever=
  true.priority=1
  true.executable=cat
  # hg update -C 1
  $ hg merge -r 2 --config merge-patterns.f=true --config merge-tools.true.executable=/nonexistent/mergetool
  couldn't find merge tool true (for pattern f)
  merging f
  couldn't find merge tool true (for pattern f)
  merging f failed!
  0 files updated, 0 files merged, 0 files removed, 1 files unresolved
  use 'hg resolve' to retry unresolved file merges or 'hg merge --abort' to abandon
  [1]
  $ aftermerge
  # cat f
  revision 1
  space
  # hg stat
  M f
  ? f.orig
  # hg resolve --list
  U f

ui.merge overrules priority

ui.merge specifies false:

  $ beforemerge
  [merge-tools]
  false.whatever=
  true.priority=1
  true.executable=cat
  # hg update -C 1
  $ hg merge -r 2 --config ui.merge=false
  merging f
  merging f failed!
  0 files updated, 0 files merged, 0 files removed, 1 files unresolved
  use 'hg resolve' to retry unresolved file merges or 'hg merge --abort' to abandon
  [1]
  $ aftermerge
  # cat f
  revision 1
  space
  # hg stat
  M f
  ? f.orig
  # hg resolve --list
  U f

ui.merge specifies internal:fail:

  $ beforemerge
  [merge-tools]
  false.whatever=
  true.priority=1
  true.executable=cat
  # hg update -C 1
  $ hg merge -r 2 --config ui.merge=internal:fail
  0 files updated, 0 files merged, 0 files removed, 1 files unresolved
  use 'hg resolve' to retry unresolved file merges or 'hg merge --abort' to abandon
  [1]
  $ aftermerge
  # cat f
  revision 1
  space
  # hg stat
  M f
  # hg resolve --list
  U f

ui.merge specifies :local (without internal prefix):

  $ beforemerge
  [merge-tools]
  false.whatever=
  true.priority=1
  true.executable=cat
  # hg update -C 1
  $ hg merge -r 2 --config ui.merge=:local
  0 files updated, 1 files merged, 0 files removed, 0 files unresolved
  (branch merge, don't forget to commit)
  $ aftermerge
  # cat f
  revision 1
  space
  # hg stat
  M f
  # hg resolve --list
  R f

ui.merge specifies internal:other:

  $ beforemerge
  [merge-tools]
  false.whatever=
  true.priority=1
  true.executable=cat
  # hg update -C 1
  $ hg merge -r 2 --config ui.merge=internal:other
  0 files updated, 1 files merged, 0 files removed, 0 files unresolved
  (branch merge, don't forget to commit)
  $ aftermerge
  # cat f
  revision 2
  space
  # hg stat
  M f
  # hg resolve --list
  R f

ui.merge specifies internal:prompt:

  $ beforemerge
  [merge-tools]
  false.whatever=
  true.priority=1
  true.executable=cat
  # hg update -C 1
  $ hg merge -r 2 --config ui.merge=internal:prompt
  keep (l)ocal [working copy], take (o)ther [merge rev], or leave (u)nresolved for f? u
  0 files updated, 0 files merged, 0 files removed, 1 files unresolved
  use 'hg resolve' to retry unresolved file merges or 'hg merge --abort' to abandon
  [1]
  $ aftermerge
  # cat f
  revision 1
  space
  # hg stat
  M f
  # hg resolve --list
  U f

ui.merge specifies :prompt, with 'leave unresolved' chosen

  $ beforemerge
  [merge-tools]
  false.whatever=
  true.priority=1
  true.executable=cat
  # hg update -C 1
  $ hg merge -r 2 --config ui.merge=:prompt --config ui.interactive=True << EOF
  > u
  > EOF
  keep (l)ocal [working copy], take (o)ther [merge rev], or leave (u)nresolved for f? u
  0 files updated, 0 files merged, 0 files removed, 1 files unresolved
  use 'hg resolve' to retry unresolved file merges or 'hg merge --abort' to abandon
  [1]
  $ aftermerge
  # cat f
  revision 1
  space
  # hg stat
  M f
  # hg resolve --list
  U f

prompt with EOF

  $ beforemerge
  [merge-tools]
  false.whatever=
  true.priority=1
  true.executable=cat
  # hg update -C 1
  $ hg merge -r 2 --config ui.merge=internal:prompt --config ui.interactive=true
  keep (l)ocal [working copy], take (o)ther [merge rev], or leave (u)nresolved for f? 
  0 files updated, 0 files merged, 0 files removed, 1 files unresolved
  use 'hg resolve' to retry unresolved file merges or 'hg merge --abort' to abandon
  [1]
  $ aftermerge
  # cat f
  revision 1
  space
  # hg stat
  M f
  # hg resolve --list
  U f
  $ hg resolve --all --config ui.merge=internal:prompt --config ui.interactive=true
  keep (l)ocal [working copy], take (o)ther [merge rev], or leave (u)nresolved for f? 
  [1]
  $ aftermerge
  # cat f
  revision 1
  space
  # hg stat
  M f
  ? f.orig
  # hg resolve --list
  U f
  $ rm f
  $ hg resolve --all --config ui.merge=internal:prompt --config ui.interactive=true
  keep (l)ocal [working copy], take (o)ther [merge rev], or leave (u)nresolved for f? 
  [1]
  $ aftermerge
  # cat f
  revision 1
  space
  # hg stat
  M f
  # hg resolve --list
  U f
  $ hg resolve --all --config ui.merge=internal:prompt
  keep (l)ocal [working copy], take (o)ther [merge rev], or leave (u)nresolved for f? u
  [1]
  $ aftermerge
  # cat f
  revision 1
  space
  # hg stat
  M f
  ? f.orig
  # hg resolve --list
  U f

ui.merge specifies internal:dump:

  $ beforemerge
  [merge-tools]
  false.whatever=
  true.priority=1
  true.executable=cat
  # hg update -C 1
  $ hg merge -r 2 --config ui.merge=internal:dump
  merging f
  0 files updated, 0 files merged, 0 files removed, 1 files unresolved
  use 'hg resolve' to retry unresolved file merges or 'hg merge --abort' to abandon
  [1]
  $ aftermerge
  # cat f
  revision 1
  space
  # hg stat
  M f
  ? f.base
  ? f.local
  ? f.orig
  ? f.other
  # hg resolve --list
  U f

f.base:

  $ cat f.base
  revision 0
  space

f.local:

  $ cat f.local
  revision 1
  space

f.other:

  $ cat f.other
  revision 2
  space
  $ rm f.base f.local f.other

check that internal:dump doesn't dump files if premerge runs
successfully

  $ beforemerge
  [merge-tools]
  false.whatever=
  true.priority=1
  true.executable=cat
  # hg update -C 1
  $ hg merge -r 3 --config ui.merge=internal:dump
  merging f
  0 files updated, 1 files merged, 0 files removed, 0 files unresolved
  (branch merge, don't forget to commit)

  $ aftermerge
  # cat f
  revision 1
  space
  revision 3
  # hg stat
  M f
  # hg resolve --list
  R f

check that internal:forcedump dumps files, even if local and other can
be merged easily

  $ beforemerge
  [merge-tools]
  false.whatever=
  true.priority=1
  true.executable=cat
  # hg update -C 1
  $ hg merge -r 3 --config ui.merge=internal:forcedump
  merging f
  0 files updated, 0 files merged, 0 files removed, 1 files unresolved
  use 'hg resolve' to retry unresolved file merges or 'hg merge --abort' to abandon
  [1]
  $ aftermerge
  # cat f
  revision 1
  space
  # hg stat
  M f
  ? f.base
  ? f.local
  ? f.orig
  ? f.other
  # hg resolve --list
  U f

  $ cat f.base
  revision 0
  space

  $ cat f.local
  revision 1
  space

  $ cat f.other
  revision 0
  space
  revision 3

  $ rm -f f.base f.local f.other

ui.merge specifies internal:other but is overruled by pattern for false:

  $ beforemerge
  [merge-tools]
  false.whatever=
  true.priority=1
  true.executable=cat
  # hg update -C 1
  $ hg merge -r 2 --config ui.merge=internal:other --config merge-patterns.f=false
  merging f
  merging f failed!
  0 files updated, 0 files merged, 0 files removed, 1 files unresolved
  use 'hg resolve' to retry unresolved file merges or 'hg merge --abort' to abandon
  [1]
  $ aftermerge
  # cat f
  revision 1
  space
  # hg stat
  M f
  ? f.orig
  # hg resolve --list
  U f

Premerge

ui.merge specifies internal:other but is overruled by --tool=false

  $ beforemerge
  [merge-tools]
  false.whatever=
  true.priority=1
  true.executable=cat
  # hg update -C 1
  $ hg merge -r 2 --config ui.merge=internal:other --tool=false
  merging f
  merging f failed!
  0 files updated, 0 files merged, 0 files removed, 1 files unresolved
  use 'hg resolve' to retry unresolved file merges or 'hg merge --abort' to abandon
  [1]
  $ aftermerge
  # cat f
  revision 1
  space
  # hg stat
  M f
  ? f.orig
  # hg resolve --list
  U f

HGMERGE specifies internal:other but is overruled by --tool=false

  $ HGMERGE=internal:other ; export HGMERGE
  $ beforemerge
  [merge-tools]
  false.whatever=
  true.priority=1
  true.executable=cat
  # hg update -C 1
  $ hg merge -r 2 --tool=false
  merging f
  merging f failed!
  0 files updated, 0 files merged, 0 files removed, 1 files unresolved
  use 'hg resolve' to retry unresolved file merges or 'hg merge --abort' to abandon
  [1]
  $ aftermerge
  # cat f
  revision 1
  space
  # hg stat
  M f
  ? f.orig
  # hg resolve --list
  U f

  $ unset HGMERGE # make sure HGMERGE doesn't interfere with remaining tests

update is a merge ...

(this also tests that files reverted with '--rev REV' are treated as
"modified", even if none of mode, size and timestamp of them isn't
changed on the filesystem (see also issue4583))

  $ cat >> $HGRCPATH <<EOF
  > [fakedirstatewritetime]
  > # emulate invoking dirstate.write() via repo.status()
  > # at 2000-01-01 00:00
  > fakenow = 200001010000
  > EOF

  $ beforemerge
  [merge-tools]
  false.whatever=
  true.priority=1
  true.executable=cat
  # hg update -C 1
  $ hg update -q 0
  $ f -s f
  f: size=17
  $ touch -t 200001010000 f
  $ hg debugrebuildstate
  $ cat >> $HGRCPATH <<EOF
  > [extensions]
  > fakedirstatewritetime = $TESTDIR/fakedirstatewritetime.py
  > EOF
  $ hg revert -q -r 1 .
  $ cat >> $HGRCPATH <<EOF
  > [extensions]
  > fakedirstatewritetime = !
  > EOF
  $ f -s f
  f: size=17
  $ touch -t 200001010000 f
  $ hg status f
  M f
  $ hg update -r 2
  merging f
  revision 1
  space
  revision 0
  space
  revision 2
  space
  0 files updated, 1 files merged, 0 files removed, 0 files unresolved
  $ aftermerge
  # cat f
  revision 1
  space
  # hg stat
  M f
  # hg resolve --list
  R f

update should also have --tool

  $ beforemerge
  [merge-tools]
  false.whatever=
  true.priority=1
  true.executable=cat
  # hg update -C 1
  $ hg update -q 0
  $ f -s f
  f: size=17
  $ touch -t 200001010000 f
  $ hg debugrebuildstate
  $ cat >> $HGRCPATH <<EOF
  > [extensions]
  > fakedirstatewritetime = $TESTDIR/fakedirstatewritetime.py
  > EOF
  $ hg revert -q -r 1 .
  $ cat >> $HGRCPATH <<EOF
  > [extensions]
  > fakedirstatewritetime = !
  > EOF
  $ f -s f
  f: size=17
  $ touch -t 200001010000 f
  $ hg status f
  M f
  $ hg update -r 2 --tool false
  merging f
  merging f failed!
  0 files updated, 0 files merged, 0 files removed, 1 files unresolved
  use 'hg resolve' to retry unresolved file merges
  [1]
  $ aftermerge
  # cat f
  revision 1
  space
  # hg stat
  M f
  ? f.orig
  # hg resolve --list
  U f

Default is silent simplemerge:

  $ beforemerge
  [merge-tools]
  false.whatever=
  true.priority=1
  true.executable=cat
  # hg update -C 1
  $ hg merge -r 3
  merging f
  0 files updated, 1 files merged, 0 files removed, 0 files unresolved
  (branch merge, don't forget to commit)
  $ aftermerge
  # cat f
  revision 1
  space
  revision 3
  # hg stat
  M f
  # hg resolve --list
  R f

.premerge=True is same:

  $ beforemerge
  [merge-tools]
  false.whatever=
  true.priority=1
  true.executable=cat
  # hg update -C 1
  $ hg merge -r 3 --config merge-tools.true.premerge=True
  merging f
  0 files updated, 1 files merged, 0 files removed, 0 files unresolved
  (branch merge, don't forget to commit)
  $ aftermerge
  # cat f
  revision 1
  space
  revision 3
  # hg stat
  M f
  # hg resolve --list
  R f

.premerge=False executes merge-tool:

  $ beforemerge
  [merge-tools]
  false.whatever=
  true.priority=1
  true.executable=cat
  # hg update -C 1
  $ hg merge -r 3 --config merge-tools.true.premerge=False
  merging f
  revision 1
  space
  revision 0
  space
  revision 0
  space
  revision 3
  0 files updated, 1 files merged, 0 files removed, 0 files unresolved
  (branch merge, don't forget to commit)
  $ aftermerge
  # cat f
  revision 1
  space
  # hg stat
  M f
  # hg resolve --list
  R f

premerge=keep keeps conflict markers in:

  $ beforemerge
  [merge-tools]
  false.whatever=
  true.priority=1
  true.executable=cat
  # hg update -C 1
  $ hg merge -r 4 --config merge-tools.true.premerge=keep
  merging f
  <<<<<<< working copy: ef83787e2614 - test: revision 1
  revision 1
  space
  =======
  revision 4
  >>>>>>> merge rev:    81448d39c9a0 - test: revision 4
  revision 0
  space
  revision 4
  0 files updated, 1 files merged, 0 files removed, 0 files unresolved
  (branch merge, don't forget to commit)
  $ aftermerge
  # cat f
  <<<<<<< working copy: ef83787e2614 - test: revision 1
  revision 1
  space
  =======
  revision 4
  >>>>>>> merge rev:    81448d39c9a0 - test: revision 4
  # hg stat
  M f
  # hg resolve --list
  R f

premerge=keep-merge3 keeps conflict markers with base content:

  $ beforemerge
  [merge-tools]
  false.whatever=
  true.priority=1
  true.executable=cat
  # hg update -C 1
  $ hg merge -r 4 --config merge-tools.true.premerge=keep-merge3
  merging f
  <<<<<<< working copy: ef83787e2614 - test: revision 1
  revision 1
  space
  ||||||| base
  revision 0
  space
  =======
  revision 4
  >>>>>>> merge rev:    81448d39c9a0 - test: revision 4
  revision 0
  space
  revision 4
  0 files updated, 1 files merged, 0 files removed, 0 files unresolved
  (branch merge, don't forget to commit)
  $ aftermerge
  # cat f
  <<<<<<< working copy: ef83787e2614 - test: revision 1
  revision 1
  space
  ||||||| base
  revision 0
  space
  =======
  revision 4
  >>>>>>> merge rev:    81448d39c9a0 - test: revision 4
  # hg stat
  M f
  # hg resolve --list
  R f

premerge=keep respects ui.mergemarkers=basic:

  $ beforemerge
  [merge-tools]
  false.whatever=
  true.priority=1
  true.executable=cat
  # hg update -C 1
  $ hg merge -r 4 --config merge-tools.true.premerge=keep --config ui.mergemarkers=basic
  merging f
  <<<<<<< working copy
  revision 1
  space
  =======
  revision 4
  >>>>>>> merge rev
  revision 0
  space
  revision 4
  0 files updated, 1 files merged, 0 files removed, 0 files unresolved
  (branch merge, don't forget to commit)
  $ aftermerge
  # cat f
  <<<<<<< working copy
  revision 1
  space
  =======
  revision 4
  >>>>>>> merge rev
  # hg stat
  M f
  # hg resolve --list
  R f

premerge=keep ignores ui.mergemarkers=basic if true.mergemarkers=detailed:

  $ beforemerge
  [merge-tools]
  false.whatever=
  true.priority=1
  true.executable=cat
  # hg update -C 1
  $ hg merge -r 4 --config merge-tools.true.premerge=keep \
  >     --config ui.mergemarkers=basic \
  >     --config merge-tools.true.mergemarkers=detailed
  merging f
  <<<<<<< working copy: ef83787e2614 - test: revision 1
  revision 1
  space
  =======
  revision 4
  >>>>>>> merge rev:    81448d39c9a0 - test: revision 4
  revision 0
  space
  revision 4
  0 files updated, 1 files merged, 0 files removed, 0 files unresolved
  (branch merge, don't forget to commit)
  $ aftermerge
  # cat f
  <<<<<<< working copy: ef83787e2614 - test: revision 1
  revision 1
  space
  =======
  revision 4
  >>>>>>> merge rev:    81448d39c9a0 - test: revision 4
  # hg stat
  M f
  # hg resolve --list
  R f

premerge=keep respects ui.mergemarkertemplate instead of
true.mergemarkertemplate if true.mergemarkers=basic:

  $ beforemerge
  [merge-tools]
  false.whatever=
  true.priority=1
  true.executable=cat
  # hg update -C 1
  $ hg merge -r 4 --config merge-tools.true.premerge=keep \
  >    --config ui.mergemarkertemplate='uitmpl {rev}' \
  >    --config merge-tools.true.mergemarkertemplate='tooltmpl {short(node)}'
  merging f
  <<<<<<< working copy: uitmpl 1
  revision 1
  space
  =======
  revision 4
  >>>>>>> merge rev:    uitmpl 4
  revision 0
  space
  revision 4
  0 files updated, 1 files merged, 0 files removed, 0 files unresolved
  (branch merge, don't forget to commit)
  $ aftermerge
  # cat f
  <<<<<<< working copy: uitmpl 1
  revision 1
  space
  =======
  revision 4
  >>>>>>> merge rev:    uitmpl 4
  # hg stat
  M f
  # hg resolve --list
  R f

premerge=keep respects true.mergemarkertemplate instead of
true.mergemarkertemplate if true.mergemarkers=detailed:

  $ beforemerge
  [merge-tools]
  false.whatever=
  true.priority=1
  true.executable=cat
  # hg update -C 1
  $ hg merge -r 4 --config merge-tools.true.premerge=keep \
  >    --config ui.mergemarkertemplate='uitmpl {rev}' \
  >    --config merge-tools.true.mergemarkertemplate='tooltmpl {short(node)}' \
  >    --config merge-tools.true.mergemarkers=detailed
  merging f
  <<<<<<< working copy: tooltmpl ef83787e2614
  revision 1
  space
  =======
  revision 4
  >>>>>>> merge rev:    tooltmpl 81448d39c9a0
  revision 0
  space
  revision 4
  0 files updated, 1 files merged, 0 files removed, 0 files unresolved
  (branch merge, don't forget to commit)
  $ aftermerge
  # cat f
  <<<<<<< working copy: tooltmpl ef83787e2614
  revision 1
  space
  =======
  revision 4
  >>>>>>> merge rev:    tooltmpl 81448d39c9a0
  # hg stat
  M f
  # hg resolve --list
  R f

Tool execution

set tools.args explicit to include $base $local $other $output:

  $ beforemerge
  [merge-tools]
  false.whatever=
  true.priority=1
  true.executable=cat
  # hg update -C 1
  $ hg merge -r 2 --config merge-tools.true.executable=head --config merge-tools.true.args='$base $local $other $output' \
  >   | sed 's,==> .* <==,==> ... <==,g'
  merging f
  ==> ... <==
  revision 0
  space
  
  ==> ... <==
  revision 1
  space
  
  ==> ... <==
  revision 2
  space
  
  ==> ... <==
  revision 1
  space
  0 files updated, 1 files merged, 0 files removed, 0 files unresolved
  (branch merge, don't forget to commit)
  $ aftermerge
  # cat f
  revision 1
  space
  # hg stat
  M f
  # hg resolve --list
  R f

Merge with "echo mergeresult > $local":

  $ beforemerge
  [merge-tools]
  false.whatever=
  true.priority=1
  true.executable=cat
  # hg update -C 1
  $ hg merge -r 2 --config merge-tools.true.executable=echo --config merge-tools.true.args='mergeresult > $local'
  merging f
  0 files updated, 1 files merged, 0 files removed, 0 files unresolved
  (branch merge, don't forget to commit)
  $ aftermerge
  # cat f
  mergeresult
  # hg stat
  M f
  # hg resolve --list
  R f

- and $local is the file f:

  $ beforemerge
  [merge-tools]
  false.whatever=
  true.priority=1
  true.executable=cat
  # hg update -C 1
  $ hg merge -r 2 --config merge-tools.true.executable=echo --config merge-tools.true.args='mergeresult > f'
  merging f
  0 files updated, 1 files merged, 0 files removed, 0 files unresolved
  (branch merge, don't forget to commit)
  $ aftermerge
  # cat f
  mergeresult
  # hg stat
  M f
  # hg resolve --list
  R f

Merge with "echo mergeresult > $output" - the variable is a bit magic:

  $ beforemerge
  [merge-tools]
  false.whatever=
  true.priority=1
  true.executable=cat
  # hg update -C 1
  $ hg merge -r 2 --config merge-tools.true.executable=echo --config merge-tools.true.args='mergeresult > $output'
  merging f
  0 files updated, 1 files merged, 0 files removed, 0 files unresolved
  (branch merge, don't forget to commit)
  $ aftermerge
  # cat f
  mergeresult
  # hg stat
  M f
  # hg resolve --list
  R f

Merge using tool with a path that must be quoted:

  $ beforemerge
  [merge-tools]
  false.whatever=
  true.priority=1
  true.executable=cat
  # hg update -C 1
  $ cat <<EOF > 'my merge tool'
  > cat "\$1" "\$2" "\$3" > "\$4"
  > EOF
  $ hg --config merge-tools.true.executable='sh' \
  >    --config merge-tools.true.args='"./my merge tool" $base $local $other $output' \
  >    merge -r 2
  merging f
  0 files updated, 1 files merged, 0 files removed, 0 files unresolved
  (branch merge, don't forget to commit)
  $ rm -f 'my merge tool'
  $ aftermerge
  # cat f
  revision 0
  space
  revision 1
  space
  revision 2
  space
  # hg stat
  M f
  # hg resolve --list
  R f

Merge using a tool that supports labellocal, labelother, and labelbase, checking
that they're quoted properly as well. This is using the default 'basic'
mergemarkers even though ui.mergemarkers is 'detailed', so it's ignoring both
mergemarkertemplate settings:

  $ beforemerge
  [merge-tools]
  false.whatever=
  true.priority=1
  true.executable=cat
  # hg update -C 1
  $ cat <<EOF > printargs_merge_tool
  > while test \$# -gt 0; do echo arg: \"\$1\"; shift; done
  > EOF
  $ hg --config merge-tools.true.executable='sh' \
  >    --config merge-tools.true.args='./printargs_merge_tool ll:$labellocal lo: $labelother lb:$labelbase": "$base' \
  >    --config merge-tools.true.mergemarkertemplate='tooltmpl {short(node)}' \
  >    --config ui.mergemarkertemplate='uitmpl {rev}' \
  >    --config ui.mergemarkers=detailed \
  >    merge -r 2
  merging f
  arg: "ll:working copy"
  arg: "lo:"
  arg: "merge rev"
  arg: "lb:base: */f~base.*" (glob)
  0 files updated, 1 files merged, 0 files removed, 0 files unresolved
  (branch merge, don't forget to commit)
  $ rm -f 'printargs_merge_tool'

Same test with experimental.mergetempdirprefix set:

  $ beforemerge
  [merge-tools]
  false.whatever=
  true.priority=1
  true.executable=cat
  # hg update -C 1
  $ cat <<EOF > printargs_merge_tool
  > while test \$# -gt 0; do echo arg: \"\$1\"; shift; done
  > EOF
  $ hg --config experimental.mergetempdirprefix=$TESTTMP/hgmerge. \
  >    --config merge-tools.true.executable='sh' \
  >    --config merge-tools.true.args='./printargs_merge_tool ll:$labellocal lo: $labelother lb:$labelbase": "$base' \
  >    --config merge-tools.true.mergemarkertemplate='tooltmpl {short(node)}' \
  >    --config ui.mergemarkertemplate='uitmpl {rev}' \
  >    --config ui.mergemarkers=detailed \
  >    merge -r 2
  merging f
  arg: "ll:working copy"
  arg: "lo:"
  arg: "merge rev"
  arg: "lb:base: */hgmerge.*/f~base" (glob)
  0 files updated, 1 files merged, 0 files removed, 0 files unresolved
  (branch merge, don't forget to commit)
  $ rm -f 'printargs_merge_tool'

Merge using a tool that supports labellocal, labelother, and labelbase, checking
that they're quoted properly as well. This is using 'detailed' mergemarkers,
even though ui.mergemarkers is 'basic', and using the tool's
mergemarkertemplate:

  $ beforemerge
  [merge-tools]
  false.whatever=
  true.priority=1
  true.executable=cat
  # hg update -C 1
  $ cat <<EOF > printargs_merge_tool
  > while test \$# -gt 0; do echo arg: \"\$1\"; shift; done
  > EOF
  $ hg --config merge-tools.true.executable='sh' \
  >    --config merge-tools.true.args='./printargs_merge_tool ll:$labellocal lo: $labelother lb:$labelbase": "$base' \
  >    --config merge-tools.true.mergemarkers=detailed \
  >    --config merge-tools.true.mergemarkertemplate='tooltmpl {short(node)}' \
  >    --config ui.mergemarkertemplate='uitmpl {rev}' \
  >    --config ui.mergemarkers=basic \
  >    merge -r 2
  merging f
  arg: "ll:working copy: tooltmpl ef83787e2614"
  arg: "lo:"
  arg: "merge rev: tooltmpl 0185f4e0cf02"
  arg: "lb:base: */f~base.*" (glob)
  0 files updated, 1 files merged, 0 files removed, 0 files unresolved
  (branch merge, don't forget to commit)
  $ rm -f 'printargs_merge_tool'

The merge tool still gets labellocal and labelother as 'basic' even when
premerge=keep is used and has 'detailed' markers:

  $ beforemerge
  [merge-tools]
  false.whatever=
  true.priority=1
  true.executable=cat
  # hg update -C 1
  $ cat <<EOF > mytool
  > echo labellocal: \"\$1\"
  > echo labelother: \"\$2\"
  > echo "output (arg)": \"\$3\"
  > echo "output (contents)":
  > cat "\$3"
  > EOF
  $ hg --config merge-tools.true.executable='sh' \
  >    --config merge-tools.true.args='mytool $labellocal $labelother $output' \
  >    --config merge-tools.true.premerge=keep \
  >    --config merge-tools.true.mergemarkertemplate='tooltmpl {short(node)}' \
  >    --config ui.mergemarkertemplate='uitmpl {rev}' \
  >    --config ui.mergemarkers=detailed \
  >    merge -r 2
  merging f
  labellocal: "working copy"
  labelother: "merge rev"
  output (arg): "$TESTTMP/repo/f"
  output (contents):
  <<<<<<< working copy: uitmpl 1
  revision 1
  =======
  revision 2
  >>>>>>> merge rev:    uitmpl 2
  space
  0 files updated, 1 files merged, 0 files removed, 0 files unresolved
  (branch merge, don't forget to commit)
  $ rm -f 'mytool'

premerge=keep uses the *tool's* mergemarkertemplate if tool's
mergemarkers=detailed; labellocal and labelother also use the tool's template

  $ beforemerge
  [merge-tools]
  false.whatever=
  true.priority=1
  true.executable=cat
  # hg update -C 1
  $ cat <<EOF > mytool
  > echo labellocal: \"\$1\"
  > echo labelother: \"\$2\"
  > echo "output (arg)": \"\$3\"
  > echo "output (contents)":
  > cat "\$3"
  > EOF
  $ hg --config merge-tools.true.executable='sh' \
  >    --config merge-tools.true.args='mytool $labellocal $labelother $output' \
  >    --config merge-tools.true.premerge=keep \
  >    --config merge-tools.true.mergemarkers=detailed \
  >    --config merge-tools.true.mergemarkertemplate='tooltmpl {short(node)}' \
  >    --config ui.mergemarkertemplate='uitmpl {rev}' \
  >    --config ui.mergemarkers=detailed \
  >    merge -r 2
  merging f
  labellocal: "working copy: tooltmpl ef83787e2614"
  labelother: "merge rev: tooltmpl 0185f4e0cf02"
  output (arg): "$TESTTMP/repo/f"
  output (contents):
  <<<<<<< working copy: tooltmpl ef83787e2614
  revision 1
  =======
  revision 2
  >>>>>>> merge rev:    tooltmpl 0185f4e0cf02
  space
  0 files updated, 1 files merged, 0 files removed, 0 files unresolved
  (branch merge, don't forget to commit)
  $ rm -f 'mytool'

Issue3581: Merging a filename that needs to be quoted
(This test doesn't work on Windows filesystems even on Linux, so check
for Unix-like permission)

#if unix-permissions
  $ beforemerge
  [merge-tools]
  false.whatever=
  true.priority=1
  true.executable=cat
  # hg update -C 1
  $ echo "revision 5" > '"; exit 1; echo "'
  $ hg commit -Am "revision 5"
  adding "; exit 1; echo "
  warning: filename contains '"', which is reserved on Windows: '"; exit 1; echo "'
  $ hg update -C 1 > /dev/null
  $ echo "revision 6" > '"; exit 1; echo "'
  $ hg commit -Am "revision 6"
  adding "; exit 1; echo "
  warning: filename contains '"', which is reserved on Windows: '"; exit 1; echo "'
  created new head
  $ hg merge --config merge-tools.true.executable="true" -r 5
  merging "; exit 1; echo "
  0 files updated, 1 files merged, 0 files removed, 0 files unresolved
  (branch merge, don't forget to commit)
  $ hg update -C 1 > /dev/null

#else

Match the non-portable filename commits above for test stability

  $ hg import --bypass -q - << EOF
  > # HG changeset patch
  > revision 5
  > 
  > diff --git a/"; exit 1; echo " b/"; exit 1; echo "
  > new file mode 100644
  > --- /dev/null
  > +++ b/"; exit 1; echo "
  > @@ -0,0 +1,1 @@
  > +revision 5
  > EOF

  $ hg import --bypass -q - << EOF
  > # HG changeset patch
  > revision 6
  > 
  > diff --git a/"; exit 1; echo " b/"; exit 1; echo "
  > new file mode 100644
  > --- /dev/null
  > +++ b/"; exit 1; echo "
  > @@ -0,0 +1,1 @@
  > +revision 6
  > EOF

#endif

Merge post-processing

cat is a bad merge-tool and doesn't change:

  $ beforemerge
  [merge-tools]
  false.whatever=
  true.priority=1
  true.executable=cat
  # hg update -C 1
  $ hg merge -y -r 2 --config merge-tools.true.checkchanged=1
  merging f
  revision 1
  space
  revision 0
  space
  revision 2
  space
   output file f appears unchanged
  was merge successful (yn)? n
  merging f failed!
  0 files updated, 0 files merged, 0 files removed, 1 files unresolved
  use 'hg resolve' to retry unresolved file merges or 'hg merge --abort' to abandon
  [1]
  $ aftermerge
  # cat f
  revision 1
  space
  # hg stat
  M f
  ? f.orig
  # hg resolve --list
  U f

missingbinary is a merge-tool that doesn't exist:

  $ echo "missingbinary.executable=doesnotexist" >> .hg/hgrc
  $ beforemerge
  [merge-tools]
  false.whatever=
  true.priority=1
  true.executable=cat
  missingbinary.executable=doesnotexist
  # hg update -C 1
  $ hg merge -y -r 2 --config ui.merge=missingbinary
  couldn't find merge tool missingbinary (for pattern f)
  merging f
  couldn't find merge tool missingbinary (for pattern f)
  revision 1
  space
  revision 0
  space
  revision 2
  space
  0 files updated, 1 files merged, 0 files removed, 0 files unresolved
  (branch merge, don't forget to commit)

  $ hg update -q -C 1
  $ rm f

internal merge cannot handle symlinks and shouldn't try:

#if symlink

  $ ln -s symlink f
  $ hg commit -qm 'f is symlink'

#else

  $ hg import --bypass -q - << EOF
  > # HG changeset patch
  > f is symlink
  > 
  > diff --git a/f b/f
  > old mode 100644
  > new mode 120000
  > --- a/f
  > +++ b/f
  > @@ -1,2 +1,1 @@
  > -revision 1
  > -space
  > +symlink
  > \ No newline at end of file
  > EOF

Resolve 'other [destination] changed f which local [working copy] deleted' prompt
  $ hg up -q -C --config ui.interactive=True << EOF
  > c
  > EOF

#endif

  $ hg merge -r 2 --tool internal:merge
  merging f
  warning: internal :merge cannot merge symlinks for f
  warning: conflicts while merging f! (edit, 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 merge --abort' to abandon
  [1]

Verify naming of temporary files and that extension is preserved:

  $ hg update -q -C 1
  $ hg mv f f.txt
  $ hg ci -qm "f.txt"
  $ hg update -q -C 2
  $ hg merge -y -r tip --tool echo --config merge-tools.echo.args='$base $local $other $output'
  merging f and f.txt to f.txt
  */f~base.* */f~local.*.txt */f~other.*.txt $TESTTMP/repo/f.txt (glob)
  0 files updated, 1 files merged, 0 files removed, 0 files unresolved
  (branch merge, don't forget to commit)

Verify naming of temporary files and that extension is preserved
(experimental.mergetempdirprefix version):

  $ hg update -q -C 1
  $ hg mv f f.txt
  $ hg ci -qm "f.txt"
  $ hg update -q -C 2
  $ hg merge -y -r tip --tool echo \
  >    --config merge-tools.echo.args='$base $local $other $output' \
  >    --config experimental.mergetempdirprefix=$TESTTMP/hgmerge.
  merging f and f.txt to f.txt
  $TESTTMP/hgmerge.*/f~base $TESTTMP/hgmerge.*/f~local.txt $TESTTMP/hgmerge.*/f~other.txt $TESTTMP/repo/f.txt (glob)
  0 files updated, 1 files merged, 0 files removed, 0 files unresolved
  (branch merge, don't forget to commit)

Binary files capability checking

  $ hg update -q -C 0
  $ python <<EOF
  > with open('b', 'wb') as fp:
  >     fp.write(b'\x00\x01\x02\x03')
  > EOF
  $ hg add b
  $ hg commit -qm "add binary file (#1)"

  $ hg update -q -C 0
  $ python <<EOF
  > with open('b', 'wb') as fp:
  >     fp.write(b'\x03\x02\x01\x00')
  > EOF
  $ hg add b
  $ hg commit -qm "add binary file (#2)"

By default, binary files capability of internal merge tools is not
checked strictly.

(for merge-patterns, chosen unintentionally)

  $ hg merge 9 \
  > --config merge-patterns.b=:merge-other \
  > --config merge-patterns.re:[a-z]=:other
  warning: check merge-patterns configurations, if ':merge-other' for binary file 'b' is unintentional
  (see 'hg help merge-tools' for binary files capability)
  merging b
  warning: b looks like a binary file.
  0 files updated, 0 files merged, 0 files removed, 1 files unresolved
  use 'hg resolve' to retry unresolved file merges or 'hg merge --abort' to abandon
  [1]
  $ hg merge --abort -q

(for ui.merge, ignored unintentionally)

  $ hg merge 9 \
  > --config merge-tools.:other.binary=true \
  > --config ui.merge=:other
  tool :other (for pattern b) can't handle binary
  tool true can't handle binary
  tool :other can't handle binary
  tool false can't handle binary
  no tool found to merge b
  keep (l)ocal [working copy], take (o)ther [merge rev], or leave (u)nresolved for b? u
  0 files updated, 0 files merged, 0 files removed, 1 files unresolved
  use 'hg resolve' to retry unresolved file merges or 'hg merge --abort' to abandon
  [1]
  $ hg merge --abort -q

With merge.strict-capability-check=true, binary files capability of
internal merge tools is checked strictly.

  $ f --hexdump b
  b:
  0000: 03 02 01 00                                     |....|

(for merge-patterns)

  $ hg merge 9 --config merge.strict-capability-check=true \
  > --config merge-tools.:merge-other.binary=true \
  > --config merge-patterns.b=:merge-other \
  > --config merge-patterns.re:[a-z]=:other
  tool :merge-other (for pattern b) can't handle binary
  0 files updated, 1 files merged, 0 files removed, 0 files unresolved
  (branch merge, don't forget to commit)
  $ f --hexdump b
  b:
  0000: 00 01 02 03                                     |....|
  $ hg merge --abort -q

(for ui.merge)

  $ hg merge 9 --config merge.strict-capability-check=true \
  > --config ui.merge=:other
  0 files updated, 1 files merged, 0 files removed, 0 files unresolved
  (branch merge, don't forget to commit)
  $ f --hexdump b
  b:
  0000: 00 01 02 03                                     |....|
  $ hg merge --abort -q

Check that the extra information is printed correctly

  $ hg merge 9 \
  >   --config merge-tools.testecho.executable='echo' \
  >   --config merge-tools.testecho.args='merge runs here ...' \
  >   --config merge-tools.testecho.binary=True \
  >   --config ui.merge=testecho \
  >   --config ui.pre-merge-tool-output-template='\n{label("extmerge.running_merge_tool", "Running merge tool for {path} ({toolpath}):")}\n{separate("\n", extmerge_section(local), extmerge_section(base), extmerge_section(other))}\n' \
  >   --config 'templatealias.extmerge_section(sect)="- {pad("{sect.name} ({sect.label})", 20, left=True)}: {revset(sect.node)%"{rev}:{shortest(node,8)} {desc|firstline} {separate(" ", tags, bookmarks, branch)}"}"'
  merging b
  
  Running merge tool for b ("*/bin/echo.exe"): (glob) (windows !)
  Running merge tool for b (*/bin/echo): (glob) (no-windows !)
  - local (working copy): 10:2d1f533d add binary file (#2) tip default
  -          base (base): -1:00000000  default
  -    other (merge rev): 9:1e7ad7d7 add binary file (#1) default
  merge runs here ...
  0 files updated, 1 files merged, 0 files removed, 0 files unresolved
  (branch merge, don't forget to commit)

Check that debugpicktool examines which merge tool is chosen for
specified file as expected

  $ beforemerge
  [merge-tools]
  false.whatever=
  true.priority=1
  true.executable=cat
  missingbinary.executable=doesnotexist
  # hg update -C 1

(default behavior: checking files in the working parent context)

  $ hg manifest
  f
  $ hg debugpickmergetool
  f = true

(-X/-I and file patterns limmit examination targets)

  $ hg debugpickmergetool -X f
  $ hg debugpickmergetool unknown
  unknown: no such file in rev ef83787e2614

(--changedelete emulates merging change and delete)

  $ hg debugpickmergetool --changedelete
  f = :prompt

(-r REV causes checking files in specified revision)

  $ hg manifest -r 8
  f.txt
  $ hg debugpickmergetool -r 8
  f.txt = true

#if symlink

(symlink causes chosing :prompt)

  $ hg debugpickmergetool -r 6d00b3726f6e
  f = :prompt

(by default, it is assumed that no internal merge tools has symlinks
capability)

  $ hg debugpickmergetool \
  > -r 6d00b3726f6e \
  > --config merge-tools.:merge-other.symlink=true \
  > --config merge-patterns.f=:merge-other \
  > --config merge-patterns.re:[f]=:merge-local \
  > --config merge-patterns.re:[a-z]=:other
  f = :prompt

  $ hg debugpickmergetool \
  > -r 6d00b3726f6e \
  > --config merge-tools.:other.symlink=true \
  > --config ui.merge=:other
  f = :prompt

(with strict-capability-check=true, actual symlink capabilities are
checked striclty)

  $ hg debugpickmergetool --config merge.strict-capability-check=true \
  > -r 6d00b3726f6e \
  > --config merge-tools.:merge-other.symlink=true \
  > --config merge-patterns.f=:merge-other \
  > --config merge-patterns.re:[f]=:merge-local \
  > --config merge-patterns.re:[a-z]=:other
  f = :other

  $ hg debugpickmergetool --config merge.strict-capability-check=true \
  > -r 6d00b3726f6e \
  > --config ui.merge=:other
  f = :other

  $ hg debugpickmergetool --config merge.strict-capability-check=true \
  > -r 6d00b3726f6e \
  > --config merge-tools.:merge-other.symlink=true \
  > --config ui.merge=:merge-other
  f = :prompt

#endif

(--verbose shows some configurations)

  $ hg debugpickmergetool --tool foobar -v
  with --tool 'foobar'
  f = foobar

  $ HGMERGE=false hg debugpickmergetool -v
  with HGMERGE='false'
  f = false

  $ hg debugpickmergetool --config ui.merge=false -v
  with ui.merge='false'
  f = false

(--debug shows errors detected intermediately)

  $ hg debugpickmergetool --config merge-patterns.f=true --config merge-tools.true.executable=nonexistentmergetool --debug f
  couldn't find merge tool true (for pattern f)
  couldn't find merge tool true
  f = false

  $ cd ..