tests/test-merge-changedelete.t

debugmergestate: make templated

Our IntelliJ team wants to be able to read the merge state in order to
help the user resolve merge conflicts. They had so far been reading
file contents from p1() and p2() and their merge base. That is not
ideal for several reasons (merge base is not necessarily the "graft
base", renames are not handled, commands like `hg update -m` is not
handled). It will get especially bad as of my D7827. This patch makes
the output s a templated. I haven't bothered to make it complete
(e.g. merge driver states are not handled), but it's probably good
enough as a start.

I've done a web search for "debugmergestate" and I can't find any
indication that any tools currently rely on its output. If it turns
out that we get bug reports for it once this is released, I won't
object to backing this patch out on the stable branch (and then
perhaps replace it by a separate command, or put it behind a new
flag).

The changes in test-backout.t are interesting, in particular this:

```
  -    other path: foo (node not stored in v1 format)
  +    other path:  (node foo)
```

I wonder if that means that we actually read v1 format
incorrectly. That seems to be an old format that was switched away
from in 2014, so it doesn't matter now anyway.

Differential Revision: https://phab.mercurial-scm.org/D8120

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
  file: file2 (state "u")
    local path: file2 (hash 0000000000000000000000000000000000000000, flags "")
    ancestor path: file2 (node 5d9299349fc01ddd25d0070d149b124d8f10411e)
    other path: file2 (node e7c1328648519852e723de86c0c0525acd779257)
    extra: ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff
  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
  file: file2 (state "r")
    local path: file2 (hash 0000000000000000000000000000000000000000, flags "")
    ancestor path: file2 (node 5d9299349fc01ddd25d0070d149b124d8f10411e)
    other path: file2 (node e7c1328648519852e723de86c0c0525acd779257)
    extra: ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff
  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
  file: file2 (state "r")
    local path: file2 (hash 0000000000000000000000000000000000000000, flags "")
    ancestor path: file2 (node 5d9299349fc01ddd25d0070d149b124d8f10411e)
    other path: file2 (node e7c1328648519852e723de86c0c0525acd779257)
    extra: ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff
  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
  file: file2 (state "u")
    local path: file2 (hash 0000000000000000000000000000000000000000, flags "")
    ancestor path: file2 (node 5d9299349fc01ddd25d0070d149b124d8f10411e)
    other path: file2 (node e7c1328648519852e723de86c0c0525acd779257)
    extra: ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff
  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
  file: file2 (state "r")
    local path: file2 (hash 0000000000000000000000000000000000000000, flags "")
    ancestor path: file2 (node 5d9299349fc01ddd25d0070d149b124d8f10411e)
    other path: file2 (node e7c1328648519852e723de86c0c0525acd779257)
    extra: ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff
  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
  file: file2 (state "r")
    local path: file2 (hash 0000000000000000000000000000000000000000, flags "")
    ancestor path: file2 (node 5d9299349fc01ddd25d0070d149b124d8f10411e)
    other path: file2 (node e7c1328648519852e723de86c0c0525acd779257)
    extra: ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff
  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
  file: file2 (state "u")
    local path: file2 (hash 0000000000000000000000000000000000000000, flags "")
    ancestor path: file2 (node 5d9299349fc01ddd25d0070d149b124d8f10411e)
    other path: file2 (node e7c1328648519852e723de86c0c0525acd779257)
    extra: ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff
  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
  file: file2 (state "u")
    local path: file2 (hash 0000000000000000000000000000000000000000, flags "")
    ancestor path: file2 (node 5d9299349fc01ddd25d0070d149b124d8f10411e)
    other path: file2 (node e7c1328648519852e723de86c0c0525acd779257)
    extra: ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff
  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
  file: file2 (state "u")
    local path: file2 (hash 0000000000000000000000000000000000000000, flags "")
    ancestor path: file2 (node 5d9299349fc01ddd25d0070d149b124d8f10411e)
    other path: file2 (node e7c1328648519852e723de86c0c0525acd779257)
    extra: ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff
  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
  file: file2 (state "u")
    local path: file2 (hash 0000000000000000000000000000000000000000, flags "")
    ancestor path: file2 (node 5d9299349fc01ddd25d0070d149b124d8f10411e)
    other path: file2 (node e7c1328648519852e723de86c0c0525acd779257)
    extra: ancestorlinknode = ab57bf49aa276a22d35a473592d4c34b5abc3eff
  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)