view tests/test-merge-changedelete.t @ 32697:19b9fc40cc51

revlog: skeleton support for version 2 revlogs

There are a number of improvements we want to make to revlogs
that will require a new version - version 2. It is unclear what the
full set of improvements will be or when we'll be done with them.
What I do know is that the process will likely take longer than a
single release, will require input from various stakeholders to
evaluate changes, and will have many contentious debates and
bikeshedding.

It is unrealistic to develop revlog version 2 up front: there
are just too many uncertainties that we won't know until things
are implemented and experiments are run. Some changes will also
be invasive and prone to bit rot, so sitting on dozens of patches
is not practical.

This commit introduces skeleton support for version 2 revlogs in
a way that is flexible and not bound by backwards compatibility
concerns.

An experimental repo requirement for denoting revlog v2 has been
added. The requirement string has a sub-version component to it.
This will allow us to declare multiple requirements in the course
of developing revlog v2. Whenever we change the in-development
revlog v2 format, we can tweak the string, creating a new
requirement and locking out old clients. This will allow us to
make as many backwards incompatible changes and experiments to
revlog v2 as we want. In other words, we can land code and make
meaningful progress towards revlog v2 while still maintaining
extreme format flexibility up until the point we freeze the
format and remove the experimental labels.

To enable the new repo requirement, you must supply an experimental
and undocumented config option. But not just any boolean flag
will do: you need to explicitly use a value that no sane person
should ever type. This is an additional guard against enabling
revlog v2 on an installation it shouldn't be enabled on. The
specific scenario I'm trying to prevent is say a user with a
4.4 client with a frozen format enabling the option but then
downgrading to 4.3 and accidentally creating repos with an
outdated and unsupported repo format. Requiring a "challenge"
string should prevent this.

Because the format is not yet finalized and I don't want to take
any chances, revlog v2's version is currently 0xDEAD. I figure
squatting on a value we're likely never to use as an actual revlog
version to mean "internal testing only" is acceptable. And
"dead" is easily recognized as something meaningful.

There is a bunch of cleanup that is needed before work on revlog
v2 begins in earnest. I plan on doing that work once this patch
is accepted and we're comfortable with the idea of starting down
this path.

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 update -C .' 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
  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 update -C .' 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
  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 update -C .' 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
  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 update -C .' 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
  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
  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
  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 update -C .' 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
  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 update -C .' 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
  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 update -C .' 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
  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 update -C .' 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)