comparison tests/test-rewind.t @ 5833:be8f7eb3f3a0 mercurial-4.7

test-compat: merge mercurial-4.8 into mercurial-4.7

# no-check-commit

5766:82da27321e91

  $ cat >> $HGRCPATH << EOF
  > [phases]
  > publish = false
  > [alias]
  > glf = log -GT "{rev}: {desc} ({files})"
  > [extensions]
  > evolve =
  > EOF

  $ hg init rewind-testing-base

  $ hg rewind --to '9576e80d6851+a0316c4c5417' --hidden --dry-run
  rewinding 4535d0af405c to 2 changesets: a0316c4c5417 9576e80d6851
  $ hg rewind --to '9576e80d6851' --hidden --dry-run
  rewinding 4535d0af405c to 2 changesets: a0316c4c5417 9576e80d6851

XXX this should also give us 2 changesets

  $ hg rewind --to 'a0316c4c5417' --hidden --dry-run
  rewinding 4535d0af405c to 1 changesets: a0316c4c5417

  $ hg rewind --to '9576e80d6851' --exact --hidden --dry-run
  rewinding 4535d0af405c to 1 changesets: 9576e80d6851
  $ hg rewind --to 'a0316c4c5417' --exact --hidden --dry-run
  rewinding 4535d0af405c to 1 changesets: a0316c4c5417

actual rewind

  $ hg rewind --to '9576e80d6851+a0316c4c5417' --hidden
  rewound to 2 changesets

  o  changeset:   0:eba9c2249fe7
     user:        test
     date:        Thu Jan 01 00:00:00 1970 +0000
     summary:     c_ROOT
  

Testing the defaults
--------------------

rewind with no arguments should be equivalent to `--from .`

XXX: Unfortunately, even with --keep it's not allowed

  $ hg rewind --keep --to 'desc("amended")' --hidden
  abort: uncommitted changes
  [255]

5833:be8f7eb3f3a0

  $ cat >> $HGRCPATH << EOF
  > [phases]
  > publish = false
  > [alias]
  > glf = log -GT "{rev}: {desc} ({files})"
  > glhf = log -GT "{rev}:{node|short} {desc} ({files})"
  > [extensions]
  > evolve =
  > EOF

  $ hg init rewind-testing-base

  $ hg rewind --to '9576e80d6851+a0316c4c5417' --hidden --dry-run
  rewinding 4535d0af405c to 2 changesets: a0316c4c5417 9576e80d6851
  $ hg rewind --to '9576e80d6851' --hidden --dry-run
  rewinding 4535d0af405c to 2 changesets: a0316c4c5417 9576e80d6851
  $ hg rewind --to 'a0316c4c5417' --hidden --dry-run
  rewinding 4535d0af405c to 2 changesets: a0316c4c5417 9576e80d6851

  $ hg rewind --to '9576e80d6851' --exact --hidden --dry-run
  rewinding 4535d0af405c to 2 changesets: a0316c4c5417 9576e80d6851
  $ hg rewind --to 'a0316c4c5417' --exact --hidden --dry-run
  rewinding 4535d0af405c to 2 changesets: a0316c4c5417 9576e80d6851

actual rewind

  $ hg rewind --to '9576e80d6851+a0316c4c5417' --hidden
  rewound to 2 changesets

  o  changeset:   0:eba9c2249fe7
     user:        test
     date:        Thu Jan 01 00:00:00 1970 +0000
     summary:     c_ROOT
  

  $ hg rewind --hidden --to 'allpredecessors(desc("c_B0"))' --dry-run
  abort: not rewinding, a65fceb2324a is a successor of 7e594302a05d
  (pick only one of these changesets, possibly with --exact)
  [255]
  $ hg rewind --hidden --to 'allpredecessors(desc("c_B0"))' --dry-run --exact
  abort: not rewinding, a65fceb2324a is a successor of 7e594302a05d
  (pick only one of these changesets, possibly with --exact)
  [255]
  $ hg rewind --hidden --to 'allpredecessors(desc("c_B0"))' --dry-run --as-divergence
  abort: not rewinding, a65fceb2324a is a successor of 7e594302a05d
  (pick only one of these changesets, possibly with --exact)
  [255]

Testing the defaults
--------------------

rewind with no arguments should be equivalent to `--from .`

XXX: Unfortunately, even with --keep it's not allowed

  $ hg rewind --keep --to 'desc("amended")' --hidden
  abort: uncommitted changes
  [255]

  $ cd ..

Extra cases related to folds
============================

folding with a changeset created after the rewind target
--------------------------------------------------------

..      B0 ⇠\
..      |    ⇠ AB2
.. A0 ⇠ A1 ⇠/

this simple test case introduces the idea of making rewind consider different
evolutions of fold components: "parent" evolution of A has more predecessors

  $ hg init extra-fold-case-1
  $ cd extra-fold-case-1

  $ echo R > R
  $ hg ci -qAm R
  $ echo A > A
  $ hg ci -qAm A0
  $ hg amend -m A1
  $ echo B > B
  $ hg ci -qAm B0
  $ hg fold -r 'desc("A1")::' -m AB2 --exact -q

  $ hg glhf --hidden
  @  4:7f9a5314ef94 AB2 (A B)
  |
  | x  3:16429ed4b6cb B0 (B)
  | |
  | x  2:3748b241cad8 A1 (A)
  |/
  | x  1:fa8956746c52 A0 (A)
  |/
  o  0:167e04d3d1b2 R (R)
  

target selection

when rewinding from a fold, rewind to all of its components (at various points
in their evolution) to not lose work

  $ hg rewind --hidden --to 'desc("A0")' --dry-run
  rewinding 7f9a5314ef94 to 2 changesets: fa8956746c52 16429ed4b6cb
  $ hg rewind --hidden --to 'desc("B0")' --dry-run
  rewinding 7f9a5314ef94 to 2 changesets: 3748b241cad8 16429ed4b6cb
  $ hg rewind --from 'desc("AB2")' --dry-run
  rewinding 7f9a5314ef94 to 2 changesets: 3748b241cad8 16429ed4b6cb

  $ hg rewind --hidden --to 'allpredecessors(desc("AB2"))' --dry-run
  abort: not rewinding, 3748b241cad8 is a successor of fa8956746c52
  (pick only one of these changesets, possibly with --exact)
  [255]

  $ cd ..

folding with a changeset we rebased onto
----------------------------------------

.. A0 ⇠ A1 ⇠\
..      |    ⇠ AB2
..      B0 ⇠/

similar to the previous case, but this time evolution of A has more
predecessors and at some point starts to be based on B

  $ hg init extra-fold-case-2
  $ cd extra-fold-case-2

  $ echo R > R
  $ hg ci -qAm R
  $ echo A > A
  $ hg ci -qAm A0
  $ hg up 'desc("R")' -q
  $ echo B > B
  $ hg ci -qAm B0
  $ echo A > A
  $ hg ci -qAm A1
  $ hg prune -r 'desc("A0")' -s 'desc("A1")'
  1 changesets pruned

  $ hg fold -r 'desc("B0")::' -m AB2 --exact -q

  $ hg glhf --hidden
  @  4:1988e9fe9517 AB2 (A B)
  |
  | x  3:7175ff74409b A1 (A)
  | |
  | x  2:d6ed1d624918 B0 (B)
  |/
  | x  1:fa8956746c52 A0 (A)
  |/
  o  0:167e04d3d1b2 R (R)
  

target selection

when rewinding from a fold, rewind to all of its components (at various points
in their evolution) to not lose work

  $ hg rewind --hidden --to 'desc("A0")' --dry-run
  rewinding 1988e9fe9517 to 2 changesets: fa8956746c52 d6ed1d624918
  $ hg rewind --hidden --to 'desc("B0")' --dry-run
  rewinding 1988e9fe9517 to 2 changesets: d6ed1d624918 7175ff74409b
  $ hg rewind --from 'desc("AB2")' --dry-run
  rewinding 1988e9fe9517 to 2 changesets: d6ed1d624918 7175ff74409b

  $ cd ..

folding with a changeset that rebased on us
-------------------------------------------

.. B0 ⇠⇠⇠⇠ B1 ⇠\
.. |       |    ⇠ AB2
.. |  A0 ⇠ A1 ⇠/

now evolutions of A and B have the same amount of changesets, but at point 0
they aren't yet related

  $ hg init extra-fold-case-3
  $ cd extra-fold-case-3

  $ echo R > R
  $ hg ci -qAm R
  $ echo A > A
  $ hg ci -qAm A0
  $ hg amend -m A1
  $ hg up 'desc("R")' -q
  $ echo B > B
  $ hg ci -qAm B0
  $ hg up 'desc("A1")' -q
  $ echo B > B
  $ hg ci -qAm B1
  $ hg prune -r 'desc("B0")' -s 'desc("B1")'
  1 changesets pruned

  $ hg fold -r 'desc("A1")::' -m AB2 --exact -q

  $ hg glhf --hidden
  @  5:7f9a5314ef94 AB2 (A B)
  |
  | x  4:fe7a7d317e16 B1 (B)
  | |
  +---x  3:d6ed1d624918 B0 (B)
  | |
  | x  2:3748b241cad8 A1 (A)
  |/
  | x  1:fa8956746c52 A0 (A)
  |/
  o  0:167e04d3d1b2 R (R)
  

target selection

  $ hg rewind --hidden --to 'desc("A0")' --dry-run
  rewinding 7f9a5314ef94 to 2 changesets: fa8956746c52 fe7a7d317e16
  $ hg rewind --hidden --to 'desc("B0")' --dry-run
  rewinding 7f9a5314ef94 to 2 changesets: 3748b241cad8 d6ed1d624918
  $ hg rewind --hidden --to 'desc("A1")' --dry-run
  rewinding 7f9a5314ef94 to 2 changesets: 3748b241cad8 fe7a7d317e16
  $ hg rewind --hidden --to 'desc("B1")' --dry-run
  rewinding 7f9a5314ef94 to 2 changesets: 3748b241cad8 fe7a7d317e16
  $ hg rewind --from 'desc("AB2")' --dry-run
  rewinding 7f9a5314ef94 to 2 changesets: 3748b241cad8 fe7a7d317e16

actual rewind

  $ hg rewind --hidden --to 'desc("A0")'
  1 new orphan changesets
  rewound to 2 changesets
  (1 changesets obsoleted)
  working directory is now at e492d2f9be46

after rewind to A0:
- A0' and B1' are successors to AB2 (split using rewind)
- A0' is a successor of A0 (operation: rewind)
- A0' is a child of R (just like A0)
- B1' is a successor of B1 (operation: rewind)
- B1' is a child of A1 (just like B1), and therefore an orphan

  $ hg obslog -a
  o    54b340ce1d87 (6) A0
  |\     split(description, meta, parent, content) from 7f9a5314ef94 using rewind by test (Thu Jan 01 00:00:06 1970 +0000)
  | |    meta-changed(meta) from fa8956746c52 using rewind by test (Thu Jan 01 00:00:06 1970 +0000)
  | |
  +---@  e492d2f9be46 (7) B1
  | | |    split(description, meta, parent, content) from 7f9a5314ef94 using rewind by test (Thu Jan 01 00:00:06 1970 +0000)
  | | |    meta-changed(meta) from fe7a7d317e16 using rewind by test (Thu Jan 01 00:00:06 1970 +0000)
  | | |
  x---+  7f9a5314ef94 (5) AB2
  | | |    rewritten(description, content) from 3748b241cad8 using fold by test (Thu Jan 01 00:00:06 1970 +0000)
  | | |    rewritten(description, parent, content) from fe7a7d317e16 using fold by test (Thu Jan 01 00:00:06 1970 +0000)
  | | |
  x | |  3748b241cad8 (2) A1
  |/ /     reworded(description) from fa8956746c52 using amend by test (Thu Jan 01 00:00:06 1970 +0000)
  | |
  | x  fe7a7d317e16 (4) B1
  | |    rewritten(description, parent) from d6ed1d624918 using prune by test (Thu Jan 01 00:00:06 1970 +0000)
  | |
  | x  d6ed1d624918 (3) B0
  |
  x  fa8956746c52 (1) A0
  
  $ hg glhf
  @  7:e492d2f9be46 B1 (B)
  |
  | o  6:54b340ce1d87 A0 (A)
  | |
  x |  2:3748b241cad8 A1 (A)
  |/
  o  0:167e04d3d1b2 R (R)
  

  $ hg debugobsolete --exclusive -r 'first(head())'
  7f9a5314ef94f5856ee90661268194cc5ce9b332 54b340ce1d87f3593fd9de2a742e7b444e5136ed e492d2f9be46b73c0cfa51709e92db864b8f3ed9 0 (Thu Jan 01 00:00:06 1970 +0000) {'ef1': '15', 'operation': 'rewind', 'user': 'test'}
  fa8956746c5294ce3351309133b450c5930f30f5 54b340ce1d87f3593fd9de2a742e7b444e5136ed 4 (Thu Jan 01 00:00:06 1970 +0000) {'ef1': '2', 'operation': 'rewind', 'user': 'test'}
  $ hg debugobsolete --exclusive -r 'last(head())'
  7f9a5314ef94f5856ee90661268194cc5ce9b332 54b340ce1d87f3593fd9de2a742e7b444e5136ed e492d2f9be46b73c0cfa51709e92db864b8f3ed9 0 (Thu Jan 01 00:00:06 1970 +0000) {'ef1': '15', 'operation': 'rewind', 'user': 'test'}
  fe7a7d317e168a15e8aa43131b54d3256443d728 e492d2f9be46b73c0cfa51709e92db864b8f3ed9 4 (Thu Jan 01 00:00:06 1970 +0000) {'ef1': '2', 'operation': 'rewind', 'user': 'test'}

  $ cd ..

simple fold with a missing part
-------------------------------

.. B0 ⇠ (B1) ⇠\
.. |     |     ⇠ AB2
.. A0 ⇠  A1  ⇠/

a stack was rewritten, but then a part of it became unknown locally

  $ hg init extra-fold-case-4
  $ cd extra-fold-case-4

  $ echo R > R
  $ hg ci -qAm R
  $ echo A > A
  $ hg ci -qAm A0
  $ echo B > B
  $ hg ci -qAm B0
  $ hg up 'desc("R")' -q
  $ echo A > A
  $ hg ci -qAm A1
  $ echo B > B
  $ hg ci -qAm B1
  $ hg prune -r 'desc("A0")+desc("B0")' -s 'desc("A1")+desc("B1")' --biject
  2 changesets pruned

  $ hg fold -r 'desc("A1") + desc("B1")' -m AB2 --exact -q

  $ hg glhf --hidden
  @  5:1988e9fe9517 AB2 (A B)
  |
  | x  4:25210d726f52 B1 (B)
  | |
  | x  3:9c76368ab336 A1 (A)
  |/
  | x  2:a07c12c45197 B0 (B)
  | |
  | x  1:fa8956746c52 A0 (A)
  |/
  o  0:167e04d3d1b2 R (R)
  

target selection

  $ hg rewind --hidden --to 'desc("A0")' --dry-run
  rewinding 1988e9fe9517 to 2 changesets: fa8956746c52 25210d726f52
  $ hg rewind --hidden --to 'desc("A1")' --dry-run
  rewinding 1988e9fe9517 to 2 changesets: 9c76368ab336 25210d726f52
  $ hg rewind --hidden --to 'desc("B1")' --dry-run
  rewinding 1988e9fe9517 to 2 changesets: 9c76368ab336 25210d726f52

because B0 is a child of A0, we use A0 instead of A1 unless --exact is given

XXX the semantic of --exact might need clarification here,
XXX for example, shouln't --exact make sure we only rewind to the `--to` target ?

  $ hg rewind --hidden --to 'desc("B0")' --dry-run
  rewinding 1988e9fe9517 to 2 changesets: fa8956746c52 a07c12c45197
  $ hg rewind --hidden --to 'desc("B0")' --exact --dry-run
  rewinding 1988e9fe9517 to 2 changesets: a07c12c45197 9c76368ab336

stripping one of the fold parts

  $ hg strip --config extensions.strip= -r 'desc("B1")' --hidden -q

  $ hg glhf --hidden
  @  4:1988e9fe9517 AB2 (A B)
  |
  | x  3:9c76368ab336 A1 (A)
  |/
  | x  2:a07c12c45197 B0 (B)
  | |
  | x  1:fa8956746c52 A0 (A)
  |/
  o  0:167e04d3d1b2 R (R)
  

target selection

the obvious challenge here is to somehow work around the missing fold
component, but we can't do much because it is one of the latest predecessors of
AB2 fold

in future we might have a way to allow rewind to skip changesets unknown
locally and still proceed (and lose the least amount of work possible)

  $ hg rewind --hidden --to 'desc("A0")+desc("B0")' --exact --dry-run
  rewinding 1988e9fe9517 to 2 changesets: fa8956746c52 a07c12c45197
  $ hg rewind --hidden --to 'desc("A0")' --dry-run
  abort: not rewinding, some predecessors are unknown locally: 25210d726f52
  (try selecting all changesets to rewind to manually, possibly with --exact)
  [255]
  $ hg rewind --hidden --to 'desc("A1")' --dry-run
  abort: not rewinding, some predecessors are unknown locally: 25210d726f52
  (try selecting all changesets to rewind to manually, possibly with --exact)
  [255]

XXX the semantic of --exact might need clarification here,
XXX for example, shouln't --exact make sure we only rewind to the `--to` target ?

  $ hg rewind --hidden --to 'desc("A1")' --exact --dry-run
  abort: not rewinding, some predecessors are unknown locally: 25210d726f52
  (try selecting all changesets to rewind to manually, possibly with --exact)
  [255]
  $ hg rewind --from 'desc("AB2")' --dry-run
  abort: not rewinding, some predecessors are unknown locally: 25210d726f52
  (try selecting all changesets to rewind to manually, possibly with --exact)
  [255]
  $ hg rewind --from 'desc("AB2")' --exact --dry-run
  abort: not rewinding, some predecessors are unknown locally: 25210d726f52
  (try selecting all changesets to rewind to manually, possibly with --exact)
  [255]

  $ cd ..

split and then fold with a missing part
---------------------------------------

..      /⇠ (C1) ⇠\
.. BC0 ⇠    |     \
..  |   \⇠  B1     ⇠ AC2
..  A0 ⇠⇠⇠⇠⇠⇠⇠⇠⇠⇠⇠/

here we have a case when walking successors and then predecessors of target
revisions just once might not be enough, because it's a more complex DAG with a
changeset missing from local repo

  $ hg init extra-fold-case-5
  $ cd extra-fold-case-5

  $ echo R > R
  $ hg ci -qAm R
  $ echo A > A
  $ hg ci -qAm A0
  $ echo B > B
  $ echo C > C
  $ hg ci -qAm BC0
  $ hg up 'desc("A0")' -q
  $ echo B > B
  $ hg ci -qAm B1
  $ echo C > C
  $ hg ci -qAm C1

  $ hg prune -r 'desc("BC0")' -s 'desc("B1")+desc("C1")' --split
  1 changesets pruned

  $ hg up 'desc("R")' -q
  $ echo A > A
  $ echo C > C
  $ hg ci -qAm AC2

  $ hg prune -r 'desc("A0")+desc("C1")' -s 'desc("AC2")' --fold
  2 changesets pruned
  1 new orphan changesets

  $ hg glhf --hidden
  @  5:9ccaac2e5fbb AC2 (A C)
  |
  | x  4:2e4ab803d8ae C1 (C)
  | |
  | *  3:44774eafdc1c B1 (B)
  | |
  | | x  2:883d75400657 BC0 (B C)
  | |/
  | x  1:fa8956746c52 A0 (A)
  |/
  o  0:167e04d3d1b2 R (R)
  

target selection

  $ hg rewind --hidden --to 'desc("A0")' --dry-run
  rewinding 9ccaac2e5fbb to 2 changesets: fa8956746c52 2e4ab803d8ae
  $ hg rewind --hidden --to 'desc("BC0")' --dry-run
  rewinding 44774eafdc1c to 1 changesets: 883d75400657
  rewinding 9ccaac2e5fbb to 2 changesets: fa8956746c52 883d75400657
  $ hg rewind --from 'desc("AC2")' --dry-run
  rewinding 9ccaac2e5fbb to 2 changesets: fa8956746c52 2e4ab803d8ae

stripping a component of AC2 fold

  $ hg strip --config extensions.strip= --hidden -r 'desc("C1")' -q
  warning: ignoring unknown working parent 9ccaac2e5fbb!

target selection

at the moment, there's not much that we can do here because of missing C1

in future we might have a way to allow rewind to skip changesets unknown
locally and still proceed (and lose the least amount of work possible)

XXX the semantic of --exact might need clarification here,
XXX for example, shouln't --exact make sure we only rewind to the `--to` target ?

  $ hg rewind --hidden --to 'desc("A0")' --dry-run
  abort: not rewinding, some predecessors are unknown locally: 2e4ab803d8ae
  (try selecting all changesets to rewind to manually, possibly with --exact)
  [255]
  $ hg rewind --hidden --to 'desc("BC0")' --dry-run
  rewinding 44774eafdc1c to 1 changesets: 883d75400657
  rewinding 9ccaac2e5fbb to 2 changesets: fa8956746c52 883d75400657
  $ hg rewind --from 'desc("AC2")' --dry-run
  abort: not rewinding, some predecessors are unknown locally: 2e4ab803d8ae
  (try selecting all changesets to rewind to manually, possibly with --exact)
  [255]
  $ hg rewind --from 'desc("AC2")' --exact --dry-run
  abort: not rewinding, some predecessors are unknown locally: 2e4ab803d8ae
  (try selecting all changesets to rewind to manually, possibly with --exact)
  [255]