view tests/test-merge-changedelete.t @ 45587:4c8a93ec6908

merge: store commitinfo if these is a dc or cd conflict

delete-changed or changed-delete conflicts can either be resolved by mergetool,
if some tool is passed and using or by user choose something on prompt or user
doing some `hg revert` after choosing the file to remain conflicted.

If the user decides to keep the changed side, on commit we just reuse the parent
filenode. This is mostly fine unless we are in a distributed environment and
people are doing criss-cross merges.

Since, we don't have recursive merges or any other way of describing the end
result of the merge was an explicit choice and it should be differentiated from
it's ancestors, merge algo during criss-cross merges fails to take in account
the explicit choice made by user and end up with a what-can-be-said-wrong-merge.

The solution which we are trying to fix this is by creating a filenode on commit
instead of reusing the parent filenode. This helps differentiate between
pre-merged filenode and post-merge filenode and kind of tells about the choice
user made.

To implement creating new filenode functionality, we store info about these
files in mergestate so that we can read them on commit and force create a new
filenode.

Differential Revision: https://phab.mercurial-scm.org/D8988

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
  file 'file1' was deleted in other [merge rev] but was modified in local [working copy].
  You can use (c)hanged version, (d)elete, or leave (u)nresolved.
  What do you want to do? u
  file 'file2' was deleted in local [working copy] but was modified in other [merge rev].
  You can use (c)hanged version, leave (d)eleted, or leave (u)nresolved.
  What do you want to do? 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 ---
  local (working copy): 13910f48cf7bdb2a0ba6e24b4900e4fdd5739dd4
  other (merge rev): 10f9a0a634e82080907e62f075ab119cbc565ea6
  file: file1 (state "u")
    local path: file1 (hash 60b27f004e454aca81b0480209cce5081ec52390, flags "")
    ancestor path: file1 (node b8e02f6433738021a065f94175c7cd23db5f05be)
    other path: file1 (node 0000000000000000000000000000000000000000)
    extra: ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff
    extra: merge-removal-candidate = yes
  file: file2 (state "u")
    local path: file2 (hash 0000000000000000000000000000000000000000, flags "")
    ancestor path: file2 (node 5d9299349fc01ddd25d0070d149b124d8f10411e)
    other path: file2 (node e7c1328648519852e723de86c0c0525acd779257)
    extra: ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff
    extra: merge-removal-candidate = yes
  file: file3 (state "u")
    local path: file3 (hash d5b0a58bc47161b1b8a831084b366f757c4f0b11, flags "")
    ancestor path: file3 (node 2661d26c649684b482d10f91960cc3db683c38b4)
    other path: file3 (node a2644c43e210356772c7772a8674544a62e06beb)
    extra: ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff
  --- 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
  file 'file1' was deleted in other [merge rev] but was modified in local [working copy].
  You can use (c)hanged version, (d)elete, or leave (u)nresolved.
  What do you want to do? c
  file 'file2' was deleted in local [working copy] but was modified in other [merge rev].
  You can use (c)hanged version, leave (d)eleted, or leave (u)nresolved.
  What do you want to do? 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 ---
  local (working copy): 13910f48cf7bdb2a0ba6e24b4900e4fdd5739dd4
  other (merge rev): 10f9a0a634e82080907e62f075ab119cbc565ea6
  file: file1 (state "r")
    local path: file1 (hash 60b27f004e454aca81b0480209cce5081ec52390, flags "")
    ancestor path: file1 (node b8e02f6433738021a065f94175c7cd23db5f05be)
    other path: file1 (node 0000000000000000000000000000000000000000)
    extra: ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff
    extra: merge-removal-candidate = yes
  file: file2 (state "r")
    local path: file2 (hash 0000000000000000000000000000000000000000, flags "")
    ancestor path: file2 (node 5d9299349fc01ddd25d0070d149b124d8f10411e)
    other path: file2 (node e7c1328648519852e723de86c0c0525acd779257)
    extra: ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff
    extra: merge-removal-candidate = yes
  file: file3 (state "u")
    local path: file3 (hash d5b0a58bc47161b1b8a831084b366f757c4f0b11, flags "")
    ancestor path: file3 (node 2661d26c649684b482d10f91960cc3db683c38b4)
    other path: file3 (node a2644c43e210356772c7772a8674544a62e06beb)
    extra: ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff
  --- 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
  file 'file1' was deleted in other [merge rev] but was modified in local [working copy].
  You can use (c)hanged version, (d)elete, or leave (u)nresolved.
  What do you want to do? foo
  unrecognized response
  file 'file1' was deleted in other [merge rev] but was modified in local [working copy].
  You can use (c)hanged version, (d)elete, or leave (u)nresolved.
  What do you want to do? bar
  unrecognized response
  file 'file1' was deleted in other [merge rev] but was modified in local [working copy].
  You can use (c)hanged version, (d)elete, or leave (u)nresolved.
  What do you want to do? d
  file 'file2' was deleted in local [working copy] but was modified in other [merge rev].
  You can use (c)hanged version, leave (d)eleted, or leave (u)nresolved.
  What do you want to do? baz
  unrecognized response
  file 'file2' was deleted in local [working copy] but was modified in other [merge rev].
  You can use (c)hanged version, leave (d)eleted, or leave (u)nresolved.
  What do you want to do? 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 ---
  local (working copy): 13910f48cf7bdb2a0ba6e24b4900e4fdd5739dd4
  other (merge rev): 10f9a0a634e82080907e62f075ab119cbc565ea6
  file: file1 (state "r")
    local path: file1 (hash 60b27f004e454aca81b0480209cce5081ec52390, flags "")
    ancestor path: file1 (node b8e02f6433738021a065f94175c7cd23db5f05be)
    other path: file1 (node 0000000000000000000000000000000000000000)
    extra: ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff
    extra: merge-removal-candidate = yes
  file: file2 (state "r")
    local path: file2 (hash 0000000000000000000000000000000000000000, flags "")
    ancestor path: file2 (node 5d9299349fc01ddd25d0070d149b124d8f10411e)
    other path: file2 (node e7c1328648519852e723de86c0c0525acd779257)
    extra: ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff
    extra: merge-removal-candidate = yes
  file: file3 (state "u")
    local path: file3 (hash d5b0a58bc47161b1b8a831084b366f757c4f0b11, flags "")
    ancestor path: file3 (node 2661d26c649684b482d10f91960cc3db683c38b4)
    other path: file3 (node a2644c43e210356772c7772a8674544a62e06beb)
    extra: ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff
  *** 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
  file 'file1' was deleted in other [merge rev] but was modified in local [working copy].
  You can use (c)hanged version, (d)elete, or leave (u)nresolved.
  What do you want to do? d
  file 'file2' was deleted in local [working copy] but was modified in other [merge rev].
  You can use (c)hanged version, leave (d)eleted, or leave (u)nresolved.
  What do you want to do? 
  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 ---
  local (working copy): 13910f48cf7bdb2a0ba6e24b4900e4fdd5739dd4
  other (merge rev): 10f9a0a634e82080907e62f075ab119cbc565ea6
  file: file1 (state "r")
    local path: file1 (hash 60b27f004e454aca81b0480209cce5081ec52390, flags "")
    ancestor path: file1 (node b8e02f6433738021a065f94175c7cd23db5f05be)
    other path: file1 (node 0000000000000000000000000000000000000000)
    extra: ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff
    extra: merge-removal-candidate = yes
  file: file2 (state "u")
    local path: file2 (hash 0000000000000000000000000000000000000000, flags "")
    ancestor path: file2 (node 5d9299349fc01ddd25d0070d149b124d8f10411e)
    other path: file2 (node e7c1328648519852e723de86c0c0525acd779257)
    extra: ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff
    extra: merge-removal-candidate = yes
  file: file3 (state "u")
    local path: file3 (hash d5b0a58bc47161b1b8a831084b366f757c4f0b11, flags "")
    ancestor path: file3 (node 2661d26c649684b482d10f91960cc3db683c38b4)
    other path: file3 (node a2644c43e210356772c7772a8674544a62e06beb)
    extra: ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff
  *** 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 ---
  local (working copy): 13910f48cf7bdb2a0ba6e24b4900e4fdd5739dd4
  other (merge rev): 10f9a0a634e82080907e62f075ab119cbc565ea6
  file: file1 (state "r")
    local path: file1 (hash 60b27f004e454aca81b0480209cce5081ec52390, flags "")
    ancestor path: file1 (node b8e02f6433738021a065f94175c7cd23db5f05be)
    other path: file1 (node 0000000000000000000000000000000000000000)
    extra: ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff
    extra: merge-removal-candidate = yes
  file: file2 (state "r")
    local path: file2 (hash 0000000000000000000000000000000000000000, flags "")
    ancestor path: file2 (node 5d9299349fc01ddd25d0070d149b124d8f10411e)
    other path: file2 (node e7c1328648519852e723de86c0c0525acd779257)
    extra: ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff
    extra: merge-removal-candidate = yes
  file: file3 (state "r")
    local path: file3 (hash d5b0a58bc47161b1b8a831084b366f757c4f0b11, flags "")
    ancestor path: file3 (node 2661d26c649684b482d10f91960cc3db683c38b4)
    other path: file3 (node a2644c43e210356772c7772a8674544a62e06beb)
    extra: ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff
  --- 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 ---
  local (working copy): 13910f48cf7bdb2a0ba6e24b4900e4fdd5739dd4
  other (merge rev): 10f9a0a634e82080907e62f075ab119cbc565ea6
  file: file1 (state "r")
    local path: file1 (hash 60b27f004e454aca81b0480209cce5081ec52390, flags "")
    ancestor path: file1 (node b8e02f6433738021a065f94175c7cd23db5f05be)
    other path: file1 (node 0000000000000000000000000000000000000000)
    extra: ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff
    extra: merge-removal-candidate = yes
  file: file2 (state "r")
    local path: file2 (hash 0000000000000000000000000000000000000000, flags "")
    ancestor path: file2 (node 5d9299349fc01ddd25d0070d149b124d8f10411e)
    other path: file2 (node e7c1328648519852e723de86c0c0525acd779257)
    extra: ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff
    extra: merge-removal-candidate = yes
  file: file3 (state "r")
    local path: file3 (hash d5b0a58bc47161b1b8a831084b366f757c4f0b11, flags "")
    ancestor path: file3 (node 2661d26c649684b482d10f91960cc3db683c38b4)
    other path: file3 (node a2644c43e210356772c7772a8674544a62e06beb)
    extra: ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff
  *** 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 ---
  local (working copy): 13910f48cf7bdb2a0ba6e24b4900e4fdd5739dd4
  other (merge rev): 10f9a0a634e82080907e62f075ab119cbc565ea6
  file: file1 (state "u")
    local path: file1 (hash 60b27f004e454aca81b0480209cce5081ec52390, flags "")
    ancestor path: file1 (node b8e02f6433738021a065f94175c7cd23db5f05be)
    other path: file1 (node 0000000000000000000000000000000000000000)
    extra: ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff
    extra: merge-removal-candidate = yes
  file: file2 (state "u")
    local path: file2 (hash 0000000000000000000000000000000000000000, flags "")
    ancestor path: file2 (node 5d9299349fc01ddd25d0070d149b124d8f10411e)
    other path: file2 (node e7c1328648519852e723de86c0c0525acd779257)
    extra: ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff
    extra: merge-removal-candidate = yes
  file: file3 (state "u")
    local path: file3 (hash d5b0a58bc47161b1b8a831084b366f757c4f0b11, flags "")
    ancestor path: file3 (node 2661d26c649684b482d10f91960cc3db683c38b4)
    other path: file3 (node a2644c43e210356772c7772a8674544a62e06beb)
    extra: ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff
  --- 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
  file 'file1' was deleted in other [merge rev] but was modified in local [working copy].
  You can use (c)hanged version, (d)elete, or leave (u)nresolved.
  What do you want to do? 
  file 'file2' was deleted in local [working copy] but was modified in other [merge rev].
  You can use (c)hanged version, leave (d)eleted, or leave (u)nresolved.
  What do you want to do? 
  file 'file3' needs to be resolved.
  You can keep (l)ocal [working copy], take (o)ther [merge rev], or leave (u)nresolved.
  What do you want to do? 
  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 ---
  local (working copy): 13910f48cf7bdb2a0ba6e24b4900e4fdd5739dd4
  other (merge rev): 10f9a0a634e82080907e62f075ab119cbc565ea6
  file: file1 (state "u")
    local path: file1 (hash 60b27f004e454aca81b0480209cce5081ec52390, flags "")
    ancestor path: file1 (node b8e02f6433738021a065f94175c7cd23db5f05be)
    other path: file1 (node 0000000000000000000000000000000000000000)
    extra: ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff
    extra: merge-removal-candidate = yes
  file: file2 (state "u")
    local path: file2 (hash 0000000000000000000000000000000000000000, flags "")
    ancestor path: file2 (node 5d9299349fc01ddd25d0070d149b124d8f10411e)
    other path: file2 (node e7c1328648519852e723de86c0c0525acd779257)
    extra: ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff
    extra: merge-removal-candidate = yes
  file: file3 (state "u")
    local path: file3 (hash d5b0a58bc47161b1b8a831084b366f757c4f0b11, flags "")
    ancestor path: file3 (node 2661d26c649684b482d10f91960cc3db683c38b4)
    other path: file3 (node a2644c43e210356772c7772a8674544a62e06beb)
    extra: ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff
  --- 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
  file 'file1' was deleted in other [merge rev] but was modified in local [working copy].
  You can use (c)hanged version, (d)elete, or leave (u)nresolved.
  What do you want to do? u
  file 'file2' was deleted in local [working copy] but was modified in other [merge rev].
  You can use (c)hanged version, leave (d)eleted, or leave (u)nresolved.
  What do you want to do? u
  file 'file3' needs to be resolved.
  You can keep (l)ocal [working copy], take (o)ther [merge rev], or leave (u)nresolved.
  What do you want to do? 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 ---
  local (working copy): 13910f48cf7bdb2a0ba6e24b4900e4fdd5739dd4
  other (merge rev): 10f9a0a634e82080907e62f075ab119cbc565ea6
  file: file1 (state "u")
    local path: file1 (hash 60b27f004e454aca81b0480209cce5081ec52390, flags "")
    ancestor path: file1 (node b8e02f6433738021a065f94175c7cd23db5f05be)
    other path: file1 (node 0000000000000000000000000000000000000000)
    extra: ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff
    extra: merge-removal-candidate = yes
  file: file2 (state "u")
    local path: file2 (hash 0000000000000000000000000000000000000000, flags "")
    ancestor path: file2 (node 5d9299349fc01ddd25d0070d149b124d8f10411e)
    other path: file2 (node e7c1328648519852e723de86c0c0525acd779257)
    extra: ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff
    extra: merge-removal-candidate = yes
  file: file3 (state "u")
    local path: file3 (hash d5b0a58bc47161b1b8a831084b366f757c4f0b11, flags "")
    ancestor path: file3 (node 2661d26c649684b482d10f91960cc3db683c38b4)
    other path: file3 (node a2644c43e210356772c7772a8674544a62e06beb)
    extra: ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff
  --- 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
  file 'file1' was deleted in other [merge rev] but was modified in local [working copy].
  You can use (c)hanged version, (d)elete, or leave (u)nresolved.
  What do you want to do? u
  file 'file2' was deleted in local [working copy] but was modified in other [merge rev].
  You can use (c)hanged version, leave (d)eleted, or leave (u)nresolved.
  What do you want to do? 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 ---
  local (working copy): 13910f48cf7bdb2a0ba6e24b4900e4fdd5739dd4
  other (merge rev): 10f9a0a634e82080907e62f075ab119cbc565ea6
  file: file1 (state "u")
    local path: file1 (hash 60b27f004e454aca81b0480209cce5081ec52390, flags "")
    ancestor path: file1 (node b8e02f6433738021a065f94175c7cd23db5f05be)
    other path: file1 (node 0000000000000000000000000000000000000000)
    extra: ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff
    extra: merge-removal-candidate = yes
  file: file2 (state "u")
    local path: file2 (hash 0000000000000000000000000000000000000000, flags "")
    ancestor path: file2 (node 5d9299349fc01ddd25d0070d149b124d8f10411e)
    other path: file2 (node e7c1328648519852e723de86c0c0525acd779257)
    extra: ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff
    extra: merge-removal-candidate = yes
  file: file3 (state "u")
    local path: file3 (hash d5b0a58bc47161b1b8a831084b366f757c4f0b11, flags "")
    ancestor path: file3 (node 2661d26c649684b482d10f91960cc3db683c38b4)
    other path: file3 (node a2644c43e210356772c7772a8674544a62e06beb)
    extra: ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff
  --- 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 ===
  file 'file1' was deleted in other [merge rev] but was modified in local [working copy].
  You can use (c)hanged version, (d)elete, or leave (u)nresolved.
  What do you want to do? 
  file 'file2' was deleted in local [working copy] but was modified in other [merge rev].
  You can use (c)hanged version, leave (d)eleted, or leave (u)nresolved.
  What do you want to do? 
  file 'file3' needs to be resolved.
  You can keep (l)ocal [working copy], take (o)ther [merge rev], or leave (u)nresolved.
  What do you want to do? 
  --- 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 ===
  file 'file1' was deleted in other [merge rev] but was modified in local [working copy].
  You can use (c)hanged version, (d)elete, or leave (u)nresolved.
  What do you want to do? 
  file 'file2' was deleted in local [working copy] but was modified in other [merge rev].
  You can use (c)hanged version, leave (d)eleted, or leave (u)nresolved.
  What do you want to do? 
  file 'file3' needs to be resolved.
  You can keep (l)ocal [working copy], take (o)ther [merge rev], or leave (u)nresolved.
  What do you want to do? 
  --- 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 ===
  file 'file1' was deleted in other [merge rev] but was modified in local [working copy].
  You can use (c)hanged version, (d)elete, or leave (u)nresolved.
  What do you want to do? 
  file 'file2' was deleted in local [working copy] but was modified in other [merge rev].
  You can use (c)hanged version, leave (d)eleted, or leave (u)nresolved.
  What do you want to do? 
  file 'file3' needs to be resolved.
  You can keep (l)ocal [working copy], take (o)ther [merge rev], or leave (u)nresolved.
  What do you want to do? 
  --- 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
  file 'file1' was deleted in other [destination] but was modified in local [working copy].
  You can use (c)hanged version, (d)elete, or leave (u)nresolved.
  What do you want to do? u
  file 'file2' was deleted in local [working copy] but was modified in other [destination].
  You can use (c)hanged version, leave (d)eleted, or leave (u)nresolved.
  What do you want to do? 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 ---
  local (working copy): ab57bf49aa276a22d35a473592d4c34b5abc3eff
  other (destination): 10f9a0a634e82080907e62f075ab119cbc565ea6
  file: file1 (state "u")
    local path: file1 (hash 60b27f004e454aca81b0480209cce5081ec52390, flags "")
    ancestor path: file1 (node b8e02f6433738021a065f94175c7cd23db5f05be)
    other path: file1 (node 0000000000000000000000000000000000000000)
    extra: ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff
  file: file2 (state "u")
    local path: file2 (hash 0000000000000000000000000000000000000000, flags "")
    ancestor path: file2 (node 5d9299349fc01ddd25d0070d149b124d8f10411e)
    other path: file2 (node e7c1328648519852e723de86c0c0525acd779257)
    extra: ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff
  --- 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 ---
  local (working copy): ab57bf49aa276a22d35a473592d4c34b5abc3eff
  other (destination): 10f9a0a634e82080907e62f075ab119cbc565ea6
  file: file1 (state "r")
    local path: file1 (hash 60b27f004e454aca81b0480209cce5081ec52390, flags "")
    ancestor path: file1 (node b8e02f6433738021a065f94175c7cd23db5f05be)
    other path: file1 (node 0000000000000000000000000000000000000000)
    extra: ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff
  file: file2 (state "r")
    local path: file2 (hash 0000000000000000000000000000000000000000, flags "")
    ancestor path: file2 (node 5d9299349fc01ddd25d0070d149b124d8f10411e)
    other path: file2 (node e7c1328648519852e723de86c0c0525acd779257)
    extra: ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff
  --- 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 ---
  local (working copy): ab57bf49aa276a22d35a473592d4c34b5abc3eff
  other (destination): 10f9a0a634e82080907e62f075ab119cbc565ea6
  file: file1 (state "r")
    local path: file1 (hash 60b27f004e454aca81b0480209cce5081ec52390, flags "")
    ancestor path: file1 (node b8e02f6433738021a065f94175c7cd23db5f05be)
    other path: file1 (node 0000000000000000000000000000000000000000)
    extra: ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff
  file: file2 (state "r")
    local path: file2 (hash 0000000000000000000000000000000000000000, flags "")
    ancestor path: file2 (node 5d9299349fc01ddd25d0070d149b124d8f10411e)
    other path: file2 (node e7c1328648519852e723de86c0c0525acd779257)
    extra: ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff
  *** 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 ---
  local (working copy): ab57bf49aa276a22d35a473592d4c34b5abc3eff
  other (destination): 10f9a0a634e82080907e62f075ab119cbc565ea6
  file: file1 (state "u")
    local path: file1 (hash 60b27f004e454aca81b0480209cce5081ec52390, flags "")
    ancestor path: file1 (node b8e02f6433738021a065f94175c7cd23db5f05be)
    other path: file1 (node 0000000000000000000000000000000000000000)
    extra: ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff
  file: file2 (state "u")
    local path: file2 (hash 0000000000000000000000000000000000000000, flags "")
    ancestor path: file2 (node 5d9299349fc01ddd25d0070d149b124d8f10411e)
    other path: file2 (node e7c1328648519852e723de86c0c0525acd779257)
    extra: ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff
  --- 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
  file 'file1' was deleted in other [destination] but was modified in local [working copy].
  You can use (c)hanged version, (d)elete, or leave (u)nresolved.
  What do you want to do? 
  file 'file2' was deleted in local [working copy] but was modified in other [destination].
  You can use (c)hanged version, leave (d)eleted, or leave (u)nresolved.
  What do you want to do? 
  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 ---
  local (working copy): ab57bf49aa276a22d35a473592d4c34b5abc3eff
  other (destination): 10f9a0a634e82080907e62f075ab119cbc565ea6
  file: file1 (state "u")
    local path: file1 (hash 60b27f004e454aca81b0480209cce5081ec52390, flags "")
    ancestor path: file1 (node b8e02f6433738021a065f94175c7cd23db5f05be)
    other path: file1 (node 0000000000000000000000000000000000000000)
    extra: ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff
  file: file2 (state "u")
    local path: file2 (hash 0000000000000000000000000000000000000000, flags "")
    ancestor path: file2 (node 5d9299349fc01ddd25d0070d149b124d8f10411e)
    other path: file2 (node e7c1328648519852e723de86c0c0525acd779257)
    extra: ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff
  --- 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
  file 'file1' was deleted in other [destination] but was modified in local [working copy].
  You can use (c)hanged version, (d)elete, or leave (u)nresolved.
  What do you want to do? u
  file 'file2' was deleted in local [working copy] but was modified in other [destination].
  You can use (c)hanged version, leave (d)eleted, or leave (u)nresolved.
  What do you want to do? 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 ---
  local (working copy): ab57bf49aa276a22d35a473592d4c34b5abc3eff
  other (destination): 10f9a0a634e82080907e62f075ab119cbc565ea6
  file: file1 (state "u")
    local path: file1 (hash 60b27f004e454aca81b0480209cce5081ec52390, flags "")
    ancestor path: file1 (node b8e02f6433738021a065f94175c7cd23db5f05be)
    other path: file1 (node 0000000000000000000000000000000000000000)
    extra: ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff
  file: file2 (state "u")
    local path: file2 (hash 0000000000000000000000000000000000000000, flags "")
    ancestor path: file2 (node 5d9299349fc01ddd25d0070d149b124d8f10411e)
    other path: file2 (node e7c1328648519852e723de86c0c0525acd779257)
    extra: ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff
  --- 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 ===
  file 'file1' was deleted in other [destination] but was modified in local [working copy].
  You can use (c)hanged version, (d)elete, or leave (u)nresolved.
  What do you want to do? 
  file 'file2' was deleted in local [working copy] but was modified in other [destination].
  You can use (c)hanged version, leave (d)eleted, or leave (u)nresolved.
  What do you want to do? 
  --- 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 ===
  file 'file1' was deleted in other [destination] but was modified in local [working copy].
  You can use (c)hanged version, (d)elete, or leave (u)nresolved.
  What do you want to do? 
  file 'file2' was deleted in local [working copy] but was modified in other [destination].
  You can use (c)hanged version, leave (d)eleted, or leave (u)nresolved.
  What do you want to do? 
  --- 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 ===
  file 'file1' was deleted in other [destination] but was modified in local [working copy].
  You can use (c)hanged version, (d)elete, or leave (u)nresolved.
  What do you want to do? 
  file 'file2' was deleted in local [working copy] but was modified in other [destination].
  You can use (c)hanged version, leave (d)eleted, or leave (u)nresolved.
  What do you want to do? 
  --- diff of status ---
  (status identical)
  
  === :prompt -> :fail ===
  --- diff of status ---
  (status identical)
  
  === :fail -> :local ===
  (no more unresolved files)
  --- diff of status ---
  (status identical)