tests/test-merge-changedelete.t

uncommit: leave empty commit if all files are uncommitted

We had instructions for our internal users to add copy information
after commit like this:

  hg uncommit <srcfile> <dstfile>
  hg cp --after <srcfile> <dstfile>
  hg amend

That usually works, but if the rename was the only change in that
commit, then the commit would get pruned. It's easy to fix the recipe:
just pass the --keep option. However, it seems too subtle, so I think
this is an indication that the commit should not be pruned if any
patterns were given.

Differential Revision: https://phab.mercurial-scm.org/D2862

Tests for change/delete conflicts, including:
b5605d88dc27: Make ui.prompt repeat on "unrecognized response" again
 (issue897)

840e2b315c1f: Fix misleading error and prompts during update/merge
 (issue556)

Make sure HGMERGE doesn't interfere with the test
  $ unset HGMERGE

  $ status() {
  >     echo "--- status ---"
  >     hg st -A file1 file2 file3
  >     echo "--- resolve --list ---"
  >     hg resolve --list file1 file2 file3
  >     echo "--- debugmergestate ---"
  >     hg debugmergestate
  >     for file in file1 file2 file3; do
  >         if [ -f $file ]; then
  >             echo "--- $file ---"
  >             cat $file
  >         else
  >             echo "*** $file does not exist"
  >         fi
  >     done
  > }

  $ hg init repo
  $ cd repo

  $ echo 1 > file1
  $ echo 2 > file2
  $ echo 3 > file3
  $ hg ci -Am 'added files'
  adding file1
  adding file2
  adding file3

  $ hg rm file1
  $ echo changed >> file2
  $ echo changed1 >> file3
  $ hg ci -m 'removed file1, changed file2, changed file3'

  $ hg co 0
  3 files updated, 0 files merged, 0 files removed, 0 files unresolved

  $ echo changed >> file1
  $ hg rm file2
  $ echo changed2 >> file3
  $ hg ci -m 'changed file1, removed file2, changed file3'
  created new head


Non-interactive merge:

  $ hg merge -y
  local [working copy] changed file1 which other [merge rev] deleted
  use (c)hanged version, (d)elete, or leave (u)nresolved? u
  other [merge rev] changed file2 which local [working copy] deleted
  use (c)hanged version, leave (d)eleted, or leave (u)nresolved? u
  merging file3
  warning: conflicts while merging file3! (edit, then use 'hg resolve --mark')
  0 files updated, 0 files merged, 0 files removed, 3 files unresolved
  use 'hg resolve' to retry unresolved file merges or 'hg merge --abort' to abandon
  [1]

  $ status
  --- status ---
  M file2
  M file3
  C file1
  --- resolve --list ---
  U file1
  U file2
  U file3
  --- debugmergestate ---
  * version 2 records
  local: 13910f48cf7bdb2a0ba6e24b4900e4fdd5739dd4
  other: 10f9a0a634e82080907e62f075ab119cbc565ea6
  labels:
    local: working copy
    other: merge rev
  file extras: file1 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
  file: file1 (record type "C", state "u", hash 60b27f004e454aca81b0480209cce5081ec52390)
    local path: file1 (flags "")
    ancestor path: file1 (node b8e02f6433738021a065f94175c7cd23db5f05be)
    other path: file1 (node null)
  file extras: file2 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
  file: file2 (record type "C", state "u", hash null)
    local path: file2 (flags "")
    ancestor path: file2 (node 5d9299349fc01ddd25d0070d149b124d8f10411e)
    other path: file2 (node e7c1328648519852e723de86c0c0525acd779257)
  file extras: file3 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
  file: file3 (record type "F", state "u", hash d5b0a58bc47161b1b8a831084b366f757c4f0b11)
    local path: file3 (flags "")
    ancestor path: file3 (node 2661d26c649684b482d10f91960cc3db683c38b4)
    other path: file3 (node a2644c43e210356772c7772a8674544a62e06beb)
  --- file1 ---
  1
  changed
  --- file2 ---
  2
  changed
  --- file3 ---
  3
  <<<<<<< working copy: 13910f48cf7b - test: changed file1, removed file2, chan...
  changed2
  =======
  changed1
  >>>>>>> merge rev:    10f9a0a634e8 - test: removed file1, changed file2, chan...


Interactive merge:

  $ hg co -C
  1 files updated, 0 files merged, 1 files removed, 0 files unresolved
  updated to "13910f48cf7b: changed file1, removed file2, changed file3"
  1 other heads for branch "default"

  $ hg merge --config ui.interactive=true <<EOF
  > c
  > d
  > EOF
  local [working copy] changed file1 which other [merge rev] deleted
  use (c)hanged version, (d)elete, or leave (u)nresolved? c
  other [merge rev] changed file2 which local [working copy] deleted
  use (c)hanged version, leave (d)eleted, or leave (u)nresolved? d
  merging file3
  warning: conflicts while merging file3! (edit, then use 'hg resolve --mark')
  0 files updated, 2 files merged, 0 files removed, 1 files unresolved
  use 'hg resolve' to retry unresolved file merges or 'hg merge --abort' to abandon
  [1]

  $ status
  --- status ---
  file2: * (glob)
  M file3
  C file1
  --- resolve --list ---
  R file1
  R file2
  U file3
  --- debugmergestate ---
  * version 2 records
  local: 13910f48cf7bdb2a0ba6e24b4900e4fdd5739dd4
  other: 10f9a0a634e82080907e62f075ab119cbc565ea6
  labels:
    local: working copy
    other: merge rev
  file extras: file1 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
  file: file1 (record type "C", state "r", hash 60b27f004e454aca81b0480209cce5081ec52390)
    local path: file1 (flags "")
    ancestor path: file1 (node b8e02f6433738021a065f94175c7cd23db5f05be)
    other path: file1 (node null)
  file extras: file2 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
  file: file2 (record type "C", state "r", hash null)
    local path: file2 (flags "")
    ancestor path: file2 (node 5d9299349fc01ddd25d0070d149b124d8f10411e)
    other path: file2 (node e7c1328648519852e723de86c0c0525acd779257)
  file extras: file3 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
  file: file3 (record type "F", state "u", hash d5b0a58bc47161b1b8a831084b366f757c4f0b11)
    local path: file3 (flags "")
    ancestor path: file3 (node 2661d26c649684b482d10f91960cc3db683c38b4)
    other path: file3 (node a2644c43e210356772c7772a8674544a62e06beb)
  --- file1 ---
  1
  changed
  *** file2 does not exist
  --- file3 ---
  3
  <<<<<<< working copy: 13910f48cf7b - test: changed file1, removed file2, chan...
  changed2
  =======
  changed1
  >>>>>>> merge rev:    10f9a0a634e8 - test: removed file1, changed file2, chan...


Interactive merge with bad input:

  $ hg co -C
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  updated to "13910f48cf7b: changed file1, removed file2, changed file3"
  1 other heads for branch "default"

  $ hg merge --config ui.interactive=true <<EOF
  > foo
  > bar
  > d
  > baz
  > c
  > EOF
  local [working copy] changed file1 which other [merge rev] deleted
  use (c)hanged version, (d)elete, or leave (u)nresolved? foo
  unrecognized response
  local [working copy] changed file1 which other [merge rev] deleted
  use (c)hanged version, (d)elete, or leave (u)nresolved? bar
  unrecognized response
  local [working copy] changed file1 which other [merge rev] deleted
  use (c)hanged version, (d)elete, or leave (u)nresolved? d
  other [merge rev] changed file2 which local [working copy] deleted
  use (c)hanged version, leave (d)eleted, or leave (u)nresolved? baz
  unrecognized response
  other [merge rev] changed file2 which local [working copy] deleted
  use (c)hanged version, leave (d)eleted, or leave (u)nresolved? c
  merging file3
  warning: conflicts while merging file3! (edit, then use 'hg resolve --mark')
  0 files updated, 1 files merged, 1 files removed, 1 files unresolved
  use 'hg resolve' to retry unresolved file merges or 'hg merge --abort' to abandon
  [1]

  $ status
  --- status ---
  M file2
  M file3
  R file1
  --- resolve --list ---
  R file1
  R file2
  U file3
  --- debugmergestate ---
  * version 2 records
  local: 13910f48cf7bdb2a0ba6e24b4900e4fdd5739dd4
  other: 10f9a0a634e82080907e62f075ab119cbc565ea6
  labels:
    local: working copy
    other: merge rev
  file extras: file1 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
  file: file1 (record type "C", state "r", hash 60b27f004e454aca81b0480209cce5081ec52390)
    local path: file1 (flags "")
    ancestor path: file1 (node b8e02f6433738021a065f94175c7cd23db5f05be)
    other path: file1 (node null)
  file extras: file2 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
  file: file2 (record type "C", state "r", hash null)
    local path: file2 (flags "")
    ancestor path: file2 (node 5d9299349fc01ddd25d0070d149b124d8f10411e)
    other path: file2 (node e7c1328648519852e723de86c0c0525acd779257)
  file extras: file3 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
  file: file3 (record type "F", state "u", hash d5b0a58bc47161b1b8a831084b366f757c4f0b11)
    local path: file3 (flags "")
    ancestor path: file3 (node 2661d26c649684b482d10f91960cc3db683c38b4)
    other path: file3 (node a2644c43e210356772c7772a8674544a62e06beb)
  *** file1 does not exist
  --- file2 ---
  2
  changed
  --- file3 ---
  3
  <<<<<<< working copy: 13910f48cf7b - test: changed file1, removed file2, chan...
  changed2
  =======
  changed1
  >>>>>>> merge rev:    10f9a0a634e8 - test: removed file1, changed file2, chan...


Interactive merge with not enough input:

  $ hg co -C
  2 files updated, 0 files merged, 1 files removed, 0 files unresolved
  updated to "13910f48cf7b: changed file1, removed file2, changed file3"
  1 other heads for branch "default"

  $ hg merge --config ui.interactive=true <<EOF
  > d
  > EOF
  local [working copy] changed file1 which other [merge rev] deleted
  use (c)hanged version, (d)elete, or leave (u)nresolved? d
  other [merge rev] changed file2 which local [working copy] deleted
  use (c)hanged version, leave (d)eleted, or leave (u)nresolved? 
  merging file3
  warning: conflicts while merging file3! (edit, then use 'hg resolve --mark')
  0 files updated, 0 files merged, 1 files removed, 2 files unresolved
  use 'hg resolve' to retry unresolved file merges or 'hg merge --abort' to abandon
  [1]

  $ status
  --- status ---
  M file2
  M file3
  R file1
  --- resolve --list ---
  R file1
  U file2
  U file3
  --- debugmergestate ---
  * version 2 records
  local: 13910f48cf7bdb2a0ba6e24b4900e4fdd5739dd4
  other: 10f9a0a634e82080907e62f075ab119cbc565ea6
  labels:
    local: working copy
    other: merge rev
  file extras: file1 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
  file: file1 (record type "C", state "r", hash 60b27f004e454aca81b0480209cce5081ec52390)
    local path: file1 (flags "")
    ancestor path: file1 (node b8e02f6433738021a065f94175c7cd23db5f05be)
    other path: file1 (node null)
  file extras: file2 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
  file: file2 (record type "C", state "u", hash null)
    local path: file2 (flags "")
    ancestor path: file2 (node 5d9299349fc01ddd25d0070d149b124d8f10411e)
    other path: file2 (node e7c1328648519852e723de86c0c0525acd779257)
  file extras: file3 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
  file: file3 (record type "F", state "u", hash d5b0a58bc47161b1b8a831084b366f757c4f0b11)
    local path: file3 (flags "")
    ancestor path: file3 (node 2661d26c649684b482d10f91960cc3db683c38b4)
    other path: file3 (node a2644c43e210356772c7772a8674544a62e06beb)
  *** file1 does not exist
  --- file2 ---
  2
  changed
  --- file3 ---
  3
  <<<<<<< working copy: 13910f48cf7b - test: changed file1, removed file2, chan...
  changed2
  =======
  changed1
  >>>>>>> merge rev:    10f9a0a634e8 - test: removed file1, changed file2, chan...

Choose local versions of files

  $ hg co -C
  2 files updated, 0 files merged, 1 files removed, 0 files unresolved
  updated to "13910f48cf7b: changed file1, removed file2, changed file3"
  1 other heads for branch "default"

  $ hg merge --tool :local
  0 files updated, 3 files merged, 0 files removed, 0 files unresolved
  (branch merge, don't forget to commit)
  $ status 2>&1 | tee $TESTTMP/local.status
  --- status ---
  file2: * (glob)
  M file3
  C file1
  --- resolve --list ---
  R file1
  R file2
  R file3
  --- debugmergestate ---
  * version 2 records
  local: 13910f48cf7bdb2a0ba6e24b4900e4fdd5739dd4
  other: 10f9a0a634e82080907e62f075ab119cbc565ea6
  labels:
    local: working copy
    other: merge rev
  file extras: file1 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
  file: file1 (record type "C", state "r", hash 60b27f004e454aca81b0480209cce5081ec52390)
    local path: file1 (flags "")
    ancestor path: file1 (node b8e02f6433738021a065f94175c7cd23db5f05be)
    other path: file1 (node null)
  file extras: file2 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
  file: file2 (record type "C", state "r", hash null)
    local path: file2 (flags "")
    ancestor path: file2 (node 5d9299349fc01ddd25d0070d149b124d8f10411e)
    other path: file2 (node e7c1328648519852e723de86c0c0525acd779257)
  file extras: file3 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
  file: file3 (record type "F", state "r", hash d5b0a58bc47161b1b8a831084b366f757c4f0b11)
    local path: file3 (flags "")
    ancestor path: file3 (node 2661d26c649684b482d10f91960cc3db683c38b4)
    other path: file3 (node a2644c43e210356772c7772a8674544a62e06beb)
  --- file1 ---
  1
  changed
  *** file2 does not exist
  --- file3 ---
  3
  changed2

Choose other versions of files

  $ hg co -C
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  updated to "13910f48cf7b: changed file1, removed file2, changed file3"
  1 other heads for branch "default"

  $ hg merge --tool :other
  0 files updated, 2 files merged, 1 files removed, 0 files unresolved
  (branch merge, don't forget to commit)
  $ status 2>&1 | tee $TESTTMP/other.status
  --- status ---
  M file2
  M file3
  R file1
  --- resolve --list ---
  R file1
  R file2
  R file3
  --- debugmergestate ---
  * version 2 records
  local: 13910f48cf7bdb2a0ba6e24b4900e4fdd5739dd4
  other: 10f9a0a634e82080907e62f075ab119cbc565ea6
  labels:
    local: working copy
    other: merge rev
  file extras: file1 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
  file: file1 (record type "C", state "r", hash 60b27f004e454aca81b0480209cce5081ec52390)
    local path: file1 (flags "")
    ancestor path: file1 (node b8e02f6433738021a065f94175c7cd23db5f05be)
    other path: file1 (node null)
  file extras: file2 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
  file: file2 (record type "C", state "r", hash null)
    local path: file2 (flags "")
    ancestor path: file2 (node 5d9299349fc01ddd25d0070d149b124d8f10411e)
    other path: file2 (node e7c1328648519852e723de86c0c0525acd779257)
  file extras: file3 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
  file: file3 (record type "F", state "r", hash d5b0a58bc47161b1b8a831084b366f757c4f0b11)
    local path: file3 (flags "")
    ancestor path: file3 (node 2661d26c649684b482d10f91960cc3db683c38b4)
    other path: file3 (node a2644c43e210356772c7772a8674544a62e06beb)
  *** file1 does not exist
  --- file2 ---
  2
  changed
  --- file3 ---
  3
  changed1

Fail

  $ hg co -C
  2 files updated, 0 files merged, 1 files removed, 0 files unresolved
  updated to "13910f48cf7b: changed file1, removed file2, changed file3"
  1 other heads for branch "default"

  $ hg merge --tool :fail
  0 files updated, 0 files merged, 0 files removed, 3 files unresolved
  use 'hg resolve' to retry unresolved file merges or 'hg merge --abort' to abandon
  [1]
  $ status 2>&1 | tee $TESTTMP/fail.status
  --- status ---
  M file2
  M file3
  C file1
  --- resolve --list ---
  U file1
  U file2
  U file3
  --- debugmergestate ---
  * version 2 records
  local: 13910f48cf7bdb2a0ba6e24b4900e4fdd5739dd4
  other: 10f9a0a634e82080907e62f075ab119cbc565ea6
  labels:
    local: working copy
    other: merge rev
  file extras: file1 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
  file: file1 (record type "C", state "u", hash 60b27f004e454aca81b0480209cce5081ec52390)
    local path: file1 (flags "")
    ancestor path: file1 (node b8e02f6433738021a065f94175c7cd23db5f05be)
    other path: file1 (node null)
  file extras: file2 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
  file: file2 (record type "C", state "u", hash null)
    local path: file2 (flags "")
    ancestor path: file2 (node 5d9299349fc01ddd25d0070d149b124d8f10411e)
    other path: file2 (node e7c1328648519852e723de86c0c0525acd779257)
  file extras: file3 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
  file: file3 (record type "F", state "u", hash d5b0a58bc47161b1b8a831084b366f757c4f0b11)
    local path: file3 (flags "")
    ancestor path: file3 (node 2661d26c649684b482d10f91960cc3db683c38b4)
    other path: file3 (node a2644c43e210356772c7772a8674544a62e06beb)
  --- file1 ---
  1
  changed
  --- file2 ---
  2
  changed
  --- file3 ---
  3
  changed2

Force prompts with no input (should be similar to :fail)

  $ hg co -C
  1 files updated, 0 files merged, 1 files removed, 0 files unresolved
  updated to "13910f48cf7b: changed file1, removed file2, changed file3"
  1 other heads for branch "default"

  $ hg merge --config ui.interactive=True --tool :prompt
  local [working copy] changed file1 which other [merge rev] deleted
  use (c)hanged version, (d)elete, or leave (u)nresolved? 
  other [merge rev] changed file2 which local [working copy] deleted
  use (c)hanged version, leave (d)eleted, or leave (u)nresolved? 
  keep (l)ocal [working copy], take (o)ther [merge rev], or leave (u)nresolved for file3? 
  0 files updated, 0 files merged, 0 files removed, 3 files unresolved
  use 'hg resolve' to retry unresolved file merges or 'hg merge --abort' to abandon
  [1]
  $ status 2>&1 | tee $TESTTMP/prompt.status
  --- status ---
  M file2
  M file3
  C file1
  --- resolve --list ---
  U file1
  U file2
  U file3
  --- debugmergestate ---
  * version 2 records
  local: 13910f48cf7bdb2a0ba6e24b4900e4fdd5739dd4
  other: 10f9a0a634e82080907e62f075ab119cbc565ea6
  labels:
    local: working copy
    other: merge rev
  file extras: file1 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
  file: file1 (record type "C", state "u", hash 60b27f004e454aca81b0480209cce5081ec52390)
    local path: file1 (flags "")
    ancestor path: file1 (node b8e02f6433738021a065f94175c7cd23db5f05be)
    other path: file1 (node null)
  file extras: file2 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
  file: file2 (record type "C", state "u", hash null)
    local path: file2 (flags "")
    ancestor path: file2 (node 5d9299349fc01ddd25d0070d149b124d8f10411e)
    other path: file2 (node e7c1328648519852e723de86c0c0525acd779257)
  file extras: file3 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
  file: file3 (record type "F", state "u", hash d5b0a58bc47161b1b8a831084b366f757c4f0b11)
    local path: file3 (flags "")
    ancestor path: file3 (node 2661d26c649684b482d10f91960cc3db683c38b4)
    other path: file3 (node a2644c43e210356772c7772a8674544a62e06beb)
  --- file1 ---
  1
  changed
  --- file2 ---
  2
  changed
  --- file3 ---
  3
  changed2
  $ cmp $TESTTMP/fail.status $TESTTMP/prompt.status || diff -U8 $TESTTMP/fail.status $TESTTMP/prompt.status


Force prompts

  $ hg co -C
  1 files updated, 0 files merged, 1 files removed, 0 files unresolved
  updated to "13910f48cf7b: changed file1, removed file2, changed file3"
  1 other heads for branch "default"

  $ hg merge --tool :prompt
  local [working copy] changed file1 which other [merge rev] deleted
  use (c)hanged version, (d)elete, or leave (u)nresolved? u
  other [merge rev] changed file2 which local [working copy] deleted
  use (c)hanged version, leave (d)eleted, or leave (u)nresolved? u
  keep (l)ocal [working copy], take (o)ther [merge rev], or leave (u)nresolved for file3? u
  0 files updated, 0 files merged, 0 files removed, 3 files unresolved
  use 'hg resolve' to retry unresolved file merges or 'hg merge --abort' to abandon
  [1]
  $ status
  --- status ---
  M file2
  M file3
  C file1
  --- resolve --list ---
  U file1
  U file2
  U file3
  --- debugmergestate ---
  * version 2 records
  local: 13910f48cf7bdb2a0ba6e24b4900e4fdd5739dd4
  other: 10f9a0a634e82080907e62f075ab119cbc565ea6
  labels:
    local: working copy
    other: merge rev
  file extras: file1 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
  file: file1 (record type "C", state "u", hash 60b27f004e454aca81b0480209cce5081ec52390)
    local path: file1 (flags "")
    ancestor path: file1 (node b8e02f6433738021a065f94175c7cd23db5f05be)
    other path: file1 (node null)
  file extras: file2 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
  file: file2 (record type "C", state "u", hash null)
    local path: file2 (flags "")
    ancestor path: file2 (node 5d9299349fc01ddd25d0070d149b124d8f10411e)
    other path: file2 (node e7c1328648519852e723de86c0c0525acd779257)
  file extras: file3 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
  file: file3 (record type "F", state "u", hash d5b0a58bc47161b1b8a831084b366f757c4f0b11)
    local path: file3 (flags "")
    ancestor path: file3 (node 2661d26c649684b482d10f91960cc3db683c38b4)
    other path: file3 (node a2644c43e210356772c7772a8674544a62e06beb)
  --- file1 ---
  1
  changed
  --- file2 ---
  2
  changed
  --- file3 ---
  3
  changed2

Choose to merge all files

  $ hg co -C
  1 files updated, 0 files merged, 1 files removed, 0 files unresolved
  updated to "13910f48cf7b: changed file1, removed file2, changed file3"
  1 other heads for branch "default"

  $ hg merge --tool :merge3
  local [working copy] changed file1 which other [merge rev] deleted
  use (c)hanged version, (d)elete, or leave (u)nresolved? u
  other [merge rev] changed file2 which local [working copy] deleted
  use (c)hanged version, leave (d)eleted, or leave (u)nresolved? u
  merging file3
  warning: conflicts while merging file3! (edit, then use 'hg resolve --mark')
  0 files updated, 0 files merged, 0 files removed, 3 files unresolved
  use 'hg resolve' to retry unresolved file merges or 'hg merge --abort' to abandon
  [1]
  $ status
  --- status ---
  M file2
  M file3
  C file1
  --- resolve --list ---
  U file1
  U file2
  U file3
  --- debugmergestate ---
  * version 2 records
  local: 13910f48cf7bdb2a0ba6e24b4900e4fdd5739dd4
  other: 10f9a0a634e82080907e62f075ab119cbc565ea6
  labels:
    local: working copy
    other: merge rev
  file extras: file1 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
  file: file1 (record type "C", state "u", hash 60b27f004e454aca81b0480209cce5081ec52390)
    local path: file1 (flags "")
    ancestor path: file1 (node b8e02f6433738021a065f94175c7cd23db5f05be)
    other path: file1 (node null)
  file extras: file2 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
  file: file2 (record type "C", state "u", hash null)
    local path: file2 (flags "")
    ancestor path: file2 (node 5d9299349fc01ddd25d0070d149b124d8f10411e)
    other path: file2 (node e7c1328648519852e723de86c0c0525acd779257)
  file extras: file3 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
  file: file3 (record type "F", state "u", hash d5b0a58bc47161b1b8a831084b366f757c4f0b11)
    local path: file3 (flags "")
    ancestor path: file3 (node 2661d26c649684b482d10f91960cc3db683c38b4)
    other path: file3 (node a2644c43e210356772c7772a8674544a62e06beb)
  --- file1 ---
  1
  changed
  --- file2 ---
  2
  changed
  --- file3 ---
  3
  <<<<<<< working copy: 13910f48cf7b - test: changed file1, removed file2, chan...
  changed2
  ||||||| base
  =======
  changed1
  >>>>>>> merge rev:    10f9a0a634e8 - test: removed file1, changed file2, chan...

Exercise transitions between local, other, fail and prompt, and make sure the
dirstate stays consistent. (Compare with each other and to the above
invocations.)

  $ testtransitions() {
  >     # this traversal order covers every transition
  >     tools="local other prompt local fail other local prompt other fail prompt fail local"
  >     lasttool="merge3"
  >     for tool in $tools; do
  >         echo "=== :$lasttool -> :$tool ==="
  >         ref="$TESTTMP/$tool.status"
  >         hg resolve --unmark --all
  >         hg resolve --tool ":$tool" --all --config ui.interactive=True
  >         status > "$TESTTMP/compare.status" 2>&1
  >         echo '--- diff of status ---'
  >         if cmp "$TESTTMP/$tool.status" "$TESTTMP/compare.status" || diff -U8 "$TESTTMP/$tool.status" "$TESTTMP/compare.status"; then
  >             echo '(status identical)'
  >         fi
  >         lasttool="$tool"
  >         echo
  >     done
  > }

  $ testtransitions
  === :merge3 -> :local ===
  (no more unresolved files)
  --- diff of status ---
  (status identical)
  
  === :local -> :other ===
  (no more unresolved files)
  --- diff of status ---
  (status identical)
  
  === :other -> :prompt ===
  local [working copy] changed file1 which other [merge rev] deleted
  use (c)hanged version, (d)elete, or leave (u)nresolved? 
  other [merge rev] changed file2 which local [working copy] deleted
  use (c)hanged version, leave (d)eleted, or leave (u)nresolved? 
  keep (l)ocal [working copy], take (o)ther [merge rev], or leave (u)nresolved for file3? 
  --- diff of status ---
  (status identical)
  
  === :prompt -> :local ===
  (no more unresolved files)
  --- diff of status ---
  (status identical)
  
  === :local -> :fail ===
  --- diff of status ---
  (status identical)
  
  === :fail -> :other ===
  (no more unresolved files)
  --- diff of status ---
  (status identical)
  
  === :other -> :local ===
  (no more unresolved files)
  --- diff of status ---
  (status identical)
  
  === :local -> :prompt ===
  local [working copy] changed file1 which other [merge rev] deleted
  use (c)hanged version, (d)elete, or leave (u)nresolved? 
  other [merge rev] changed file2 which local [working copy] deleted
  use (c)hanged version, leave (d)eleted, or leave (u)nresolved? 
  keep (l)ocal [working copy], take (o)ther [merge rev], or leave (u)nresolved for file3? 
  --- diff of status ---
  (status identical)
  
  === :prompt -> :other ===
  (no more unresolved files)
  --- diff of status ---
  (status identical)
  
  === :other -> :fail ===
  --- diff of status ---
  (status identical)
  
  === :fail -> :prompt ===
  local [working copy] changed file1 which other [merge rev] deleted
  use (c)hanged version, (d)elete, or leave (u)nresolved? 
  other [merge rev] changed file2 which local [working copy] deleted
  use (c)hanged version, leave (d)eleted, or leave (u)nresolved? 
  keep (l)ocal [working copy], take (o)ther [merge rev], or leave (u)nresolved for file3? 
  --- diff of status ---
  (status identical)
  
  === :prompt -> :fail ===
  --- diff of status ---
  (status identical)
  
  === :fail -> :local ===
  (no more unresolved files)
  --- diff of status ---
  (status identical)
  


Non-interactive linear update

  $ hg co -C 0
  3 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ echo changed >> file1
  $ hg rm file2
  $ hg update 1 -y
  local [working copy] changed file1 which other [destination] deleted
  use (c)hanged version, (d)elete, or leave (u)nresolved? u
  other [destination] changed file2 which local [working copy] deleted
  use (c)hanged version, leave (d)eleted, or leave (u)nresolved? u
  1 files updated, 0 files merged, 0 files removed, 2 files unresolved
  use 'hg resolve' to retry unresolved file merges
  [1]
  $ status
  --- status ---
  A file1
  C file2
  C file3
  --- resolve --list ---
  U file1
  U file2
  --- debugmergestate ---
  * version 2 records
  local: ab57bf49aa276a22d35a473592d4c34b5abc3eff
  other: 10f9a0a634e82080907e62f075ab119cbc565ea6
  labels:
    local: working copy
    other: destination
  file extras: file1 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
  file: file1 (record type "C", state "u", hash 60b27f004e454aca81b0480209cce5081ec52390)
    local path: file1 (flags "")
    ancestor path: file1 (node b8e02f6433738021a065f94175c7cd23db5f05be)
    other path: file1 (node null)
  file extras: file2 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
  file: file2 (record type "C", state "u", hash null)
    local path: file2 (flags "")
    ancestor path: file2 (node 5d9299349fc01ddd25d0070d149b124d8f10411e)
    other path: file2 (node e7c1328648519852e723de86c0c0525acd779257)
  --- file1 ---
  1
  changed
  --- file2 ---
  2
  changed
  --- file3 ---
  3
  changed1

Choose local versions of files

  $ hg co -C 0
  3 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ echo changed >> file1
  $ hg rm file2
  $ hg update 1 --tool :local
  1 files updated, 2 files merged, 0 files removed, 0 files unresolved
  $ status 2>&1 | tee $TESTTMP/local.status
  --- status ---
  file2: * (glob)
  A file1
  C file3
  --- resolve --list ---
  R file1
  R file2
  --- debugmergestate ---
  * version 2 records
  local: ab57bf49aa276a22d35a473592d4c34b5abc3eff
  other: 10f9a0a634e82080907e62f075ab119cbc565ea6
  labels:
    local: working copy
    other: destination
  file extras: file1 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
  file: file1 (record type "C", state "r", hash 60b27f004e454aca81b0480209cce5081ec52390)
    local path: file1 (flags "")
    ancestor path: file1 (node b8e02f6433738021a065f94175c7cd23db5f05be)
    other path: file1 (node null)
  file extras: file2 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
  file: file2 (record type "C", state "r", hash null)
    local path: file2 (flags "")
    ancestor path: file2 (node 5d9299349fc01ddd25d0070d149b124d8f10411e)
    other path: file2 (node e7c1328648519852e723de86c0c0525acd779257)
  --- file1 ---
  1
  changed
  *** file2 does not exist
  --- file3 ---
  3
  changed1

Choose other versions of files

  $ hg co -C 0
  3 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ echo changed >> file1
  $ hg rm file2
  $ hg update 1 --tool :other
  1 files updated, 1 files merged, 1 files removed, 0 files unresolved
  $ status 2>&1 | tee $TESTTMP/other.status
  --- status ---
  file1: * (glob)
  C file2
  C file3
  --- resolve --list ---
  R file1
  R file2
  --- debugmergestate ---
  * version 2 records
  local: ab57bf49aa276a22d35a473592d4c34b5abc3eff
  other: 10f9a0a634e82080907e62f075ab119cbc565ea6
  labels:
    local: working copy
    other: destination
  file extras: file1 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
  file: file1 (record type "C", state "r", hash 60b27f004e454aca81b0480209cce5081ec52390)
    local path: file1 (flags "")
    ancestor path: file1 (node b8e02f6433738021a065f94175c7cd23db5f05be)
    other path: file1 (node null)
  file extras: file2 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
  file: file2 (record type "C", state "r", hash null)
    local path: file2 (flags "")
    ancestor path: file2 (node 5d9299349fc01ddd25d0070d149b124d8f10411e)
    other path: file2 (node e7c1328648519852e723de86c0c0525acd779257)
  *** file1 does not exist
  --- file2 ---
  2
  changed
  --- file3 ---
  3
  changed1

Fail

  $ hg co -C 0
  3 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ echo changed >> file1
  $ hg rm file2
  $ hg update 1 --tool :fail
  1 files updated, 0 files merged, 0 files removed, 2 files unresolved
  use 'hg resolve' to retry unresolved file merges
  [1]
  $ status 2>&1 | tee $TESTTMP/fail.status
  --- status ---
  A file1
  C file2
  C file3
  --- resolve --list ---
  U file1
  U file2
  --- debugmergestate ---
  * version 2 records
  local: ab57bf49aa276a22d35a473592d4c34b5abc3eff
  other: 10f9a0a634e82080907e62f075ab119cbc565ea6
  labels:
    local: working copy
    other: destination
  file extras: file1 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
  file: file1 (record type "C", state "u", hash 60b27f004e454aca81b0480209cce5081ec52390)
    local path: file1 (flags "")
    ancestor path: file1 (node b8e02f6433738021a065f94175c7cd23db5f05be)
    other path: file1 (node null)
  file extras: file2 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
  file: file2 (record type "C", state "u", hash null)
    local path: file2 (flags "")
    ancestor path: file2 (node 5d9299349fc01ddd25d0070d149b124d8f10411e)
    other path: file2 (node e7c1328648519852e723de86c0c0525acd779257)
  --- file1 ---
  1
  changed
  --- file2 ---
  2
  changed
  --- file3 ---
  3
  changed1

Force prompts with no input

  $ hg co -C 0
  3 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ echo changed >> file1
  $ hg rm file2
  $ hg update 1 --config ui.interactive=True --tool :prompt
  local [working copy] changed file1 which other [destination] deleted
  use (c)hanged version, (d)elete, or leave (u)nresolved? 
  other [destination] changed file2 which local [working copy] deleted
  use (c)hanged version, leave (d)eleted, or leave (u)nresolved? 
  1 files updated, 0 files merged, 0 files removed, 2 files unresolved
  use 'hg resolve' to retry unresolved file merges
  [1]
  $ status 2>&1 | tee $TESTTMP/prompt.status
  --- status ---
  A file1
  C file2
  C file3
  --- resolve --list ---
  U file1
  U file2
  --- debugmergestate ---
  * version 2 records
  local: ab57bf49aa276a22d35a473592d4c34b5abc3eff
  other: 10f9a0a634e82080907e62f075ab119cbc565ea6
  labels:
    local: working copy
    other: destination
  file extras: file1 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
  file: file1 (record type "C", state "u", hash 60b27f004e454aca81b0480209cce5081ec52390)
    local path: file1 (flags "")
    ancestor path: file1 (node b8e02f6433738021a065f94175c7cd23db5f05be)
    other path: file1 (node null)
  file extras: file2 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
  file: file2 (record type "C", state "u", hash null)
    local path: file2 (flags "")
    ancestor path: file2 (node 5d9299349fc01ddd25d0070d149b124d8f10411e)
    other path: file2 (node e7c1328648519852e723de86c0c0525acd779257)
  --- file1 ---
  1
  changed
  --- file2 ---
  2
  changed
  --- file3 ---
  3
  changed1
  $ cmp $TESTTMP/fail.status $TESTTMP/prompt.status || diff -U8 $TESTTMP/fail.status $TESTTMP/prompt.status

Choose to merge all files

  $ hg co -C 0
  3 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ echo changed >> file1
  $ hg rm file2
  $ hg update 1 --tool :merge3
  local [working copy] changed file1 which other [destination] deleted
  use (c)hanged version, (d)elete, or leave (u)nresolved? u
  other [destination] changed file2 which local [working copy] deleted
  use (c)hanged version, leave (d)eleted, or leave (u)nresolved? u
  1 files updated, 0 files merged, 0 files removed, 2 files unresolved
  use 'hg resolve' to retry unresolved file merges
  [1]
  $ status
  --- status ---
  A file1
  C file2
  C file3
  --- resolve --list ---
  U file1
  U file2
  --- debugmergestate ---
  * version 2 records
  local: ab57bf49aa276a22d35a473592d4c34b5abc3eff
  other: 10f9a0a634e82080907e62f075ab119cbc565ea6
  labels:
    local: working copy
    other: destination
  file extras: file1 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
  file: file1 (record type "C", state "u", hash 60b27f004e454aca81b0480209cce5081ec52390)
    local path: file1 (flags "")
    ancestor path: file1 (node b8e02f6433738021a065f94175c7cd23db5f05be)
    other path: file1 (node null)
  file extras: file2 (ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff)
  file: file2 (record type "C", state "u", hash null)
    local path: file2 (flags "")
    ancestor path: file2 (node 5d9299349fc01ddd25d0070d149b124d8f10411e)
    other path: file2 (node e7c1328648519852e723de86c0c0525acd779257)
  --- file1 ---
  1
  changed
  --- file2 ---
  2
  changed
  --- file3 ---
  3
  changed1

Test transitions between different merge tools

  $ testtransitions
  === :merge3 -> :local ===
  (no more unresolved files)
  --- diff of status ---
  (status identical)
  
  === :local -> :other ===
  (no more unresolved files)
  --- diff of status ---
  (status identical)
  
  === :other -> :prompt ===
  local [working copy] changed file1 which other [destination] deleted
  use (c)hanged version, (d)elete, or leave (u)nresolved? 
  other [destination] changed file2 which local [working copy] deleted
  use (c)hanged version, leave (d)eleted, or leave (u)nresolved? 
  --- diff of status ---
  (status identical)
  
  === :prompt -> :local ===
  (no more unresolved files)
  --- diff of status ---
  (status identical)
  
  === :local -> :fail ===
  --- diff of status ---
  (status identical)
  
  === :fail -> :other ===
  (no more unresolved files)
  --- diff of status ---
  (status identical)
  
  === :other -> :local ===
  (no more unresolved files)
  --- diff of status ---
  (status identical)
  
  === :local -> :prompt ===
  local [working copy] changed file1 which other [destination] deleted
  use (c)hanged version, (d)elete, or leave (u)nresolved? 
  other [destination] changed file2 which local [working copy] deleted
  use (c)hanged version, leave (d)eleted, or leave (u)nresolved? 
  --- diff of status ---
  (status identical)
  
  === :prompt -> :other ===
  (no more unresolved files)
  --- diff of status ---
  (status identical)
  
  === :other -> :fail ===
  --- diff of status ---
  (status identical)
  
  === :fail -> :prompt ===
  local [working copy] changed file1 which other [destination] deleted
  use (c)hanged version, (d)elete, or leave (u)nresolved? 
  other [destination] changed file2 which local [working copy] deleted
  use (c)hanged version, leave (d)eleted, or leave (u)nresolved? 
  --- diff of status ---
  (status identical)
  
  === :prompt -> :fail ===
  --- diff of status ---
  (status identical)
  
  === :fail -> :local ===
  (no more unresolved files)
  --- diff of status ---
  (status identical)