view tests/test-grab.t @ 3573:d53277cdc1e7

evolve: handle stabilization of merge changeset with both parents obsoleted

This patch adds logic to stabilize an orphan merge changeset having both parents
obsoleted.

The logic tries to first stabilize the merge changeset on successor of second
parent and then stabilize the new changeset formed on the successor of first
parent. We are stabilizing on second parent first and then to second parent to
preserve the first parent's successor as first parent of the merge changeset.

Conflicts can occcur and we can loose processing information, therefore we store
a variable in statefile `orphanmerge` which represents whether we are processing
a merge changeset with both parents obsoleted.

Thanks to Pierre-Yves David for suggesting this way and helping to understand
the correctness of this.

More rigourous test cases for this will be added in next patch.

Test for the grab command

  $ cat >> $HGRCPATH <<EOF
  > [alias]
  > glog = log -G -T "{rev}:{node|short} {desc}\n"
  > [extensions]
  > EOF
  $ echo "evolve=$(echo $(dirname $TESTDIR))/hgext3rd/evolve/" >> $HGRCPATH

  $ mkcommit() {
  >    echo "$1" > "$1"
  >    hg add "$1"
  >    hg ci -m "add $1"
  > }

  $ hg init repo
  $ cd repo
  $ hg help grab
  hg grab [-r] rev
  
  grabs a commit, move it on the top of working directory parent and
      updates to it.
  
  options:
  
   -r --rev VALUE revision to grab
   -c --continue  continue interrupted grab
   -a --abort     abort interrupted grab
  
  (some details hidden, use --verbose to show complete help)

  $ mkcommit a
  $ mkcommit b
  $ mkcommit c

  $ hg glog
  @  2:4538525df7e2 add c
  |
  o  1:7c3bad9141dc add b
  |
  o  0:1f0dee641bb7 add a
  

Grabbing an ancestor

  $ hg grab -r 7c3bad9141dc
  abort: cannot grab an ancestor revision
  [255]

Grabbing the working directory parent

  $ hg grab -r .
  abort: cannot grab an ancestor revision
  [255]

Specifying multiple revisions to grab

  $ hg grab 1f0dee641bb7 -r 7c3bad9141dc
  abort: specify just one revision
  [255]

Specifying no revisions to grab

  $ hg grab
  abort: empty revision set
  [255]

Continuing without interrupted grab

  $ hg grab --continue
  abort: no interrupted grab state exists
  [255]

Aborting without interrupted grab

  $ hg grab --abort
  abort: no interrupted grab state exists
  [255]

Specifying both continue and revs

  $ hg up 1f0dee641bb7
  0 files updated, 0 files merged, 2 files removed, 0 files unresolved
  $ hg grab -r 4538525df7e2 --continue
  abort: cannot specify both --continue and revision
  [255]

Making new branch heads

  $ mkcommit x
  created new head
  $ mkcommit y

  $ hg glog
  @  4:d46dc301d92f add y
  |
  o  3:8e224524cd09 add x
  |
  | o  2:4538525df7e2 add c
  | |
  | o  1:7c3bad9141dc add b
  |/
  o  0:1f0dee641bb7 add a
  
Grabbing a revision

  $ hg grab 7c3bad9141dc
  grabbing 1:7c3bad9141dc "add b"
  1 new orphan changesets
  $ hg glog
  @  5:7c15c05db6fa add b
  |
  o  4:d46dc301d92f add y
  |
  o  3:8e224524cd09 add x
  |
  | *  2:4538525df7e2 add c
  | |
  | x  1:7c3bad9141dc add b
  |/
  o  0:1f0dee641bb7 add a
  

When grab does not create any changes

  $ hg graft -r 4538525df7e2
  grafting 2:4538525df7e2 "add c"

  $ hg glog
  @  6:c4636a81ebeb add c
  |
  o  5:7c15c05db6fa add b
  |
  o  4:d46dc301d92f add y
  |
  o  3:8e224524cd09 add x
  |
  | *  2:4538525df7e2 add c
  | |
  | x  1:7c3bad9141dc add b
  |/
  o  0:1f0dee641bb7 add a
  
  $ hg grab -r 4538525df7e2
  grabbing 2:4538525df7e2 "add c"
  note: grab of 2:4538525df7e2 created no changes to commit

  $ hg glog
  @  6:c4636a81ebeb add c
  |
  o  5:7c15c05db6fa add b
  |
  o  4:d46dc301d92f add y
  |
  o  3:8e224524cd09 add x
  |
  o  0:1f0dee641bb7 add a
  
interrupted grab

  $ hg up d46dc301d92f
  0 files updated, 0 files merged, 2 files removed, 0 files unresolved
  $ echo foo > c
  $ hg ci -Aqm "foo to c"
  $ hg grab -r c4636a81ebeb
  grabbing 6:c4636a81ebeb "add c"
  merging c
  warning: conflicts while merging c! (edit, then use 'hg resolve --mark')
  unresolved merge conflicts (see hg help resolve)
  [1]

  $ echo foobar > c
  $ hg resolve --all --mark
  (no more unresolved files)
  continue: hg grab --continue
  $ hg grab --continue
  $ hg glog
  @  8:44e155eb95c7 add c
  |
  o  7:2ccc03d1d096 foo to c
  |
  | o  5:7c15c05db6fa add b
  |/
  o  4:d46dc301d92f add y
  |
  o  3:8e224524cd09 add x
  |
  o  0:1f0dee641bb7 add a
  

When interrupted grab results in no changes to commit

  $ hg up d46dc301d92f
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ echo bar > c
  $ hg add c
  $ hg ci -m "foo to c"
  created new head

  $ hg up 44e155eb95c7
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved

  $ hg grab 4e04628911f6
  grabbing 9:4e04628911f6 "foo to c"
  merging c
  warning: conflicts while merging c! (edit, then use 'hg resolve --mark')
  unresolved merge conflicts (see hg help resolve)
  [1]
  $ echo foobar > c
  $ hg resolve -m
  (no more unresolved files)
  continue: hg grab --continue

  $ hg grab --continue
  note: grab of 9:4e04628911f6 created no changes to commit

Testing the abort functionality of hg grab

  $ echo foo > b
  $ hg ci -Aqm "foo to b"
  $ hg glog -r .^::
  @  10:c437988de89f foo to b
  |
  o  8:44e155eb95c7 add c
  |
  ~

  $ hg grab -r 7c15c05db6fa
  grabbing 5:7c15c05db6fa "add b"
  merging b
  warning: conflicts while merging b! (edit, then use 'hg resolve --mark')
  unresolved merge conflicts (see hg help resolve)
  [1]

  $ hg grab --abort
  aborting grab, updating to c437988de89f

  $ hg glog
  @  10:c437988de89f foo to b
  |
  o  8:44e155eb95c7 add c
  |
  o  7:2ccc03d1d096 foo to c
  |
  | o  5:7c15c05db6fa add b
  |/
  o  4:d46dc301d92f add y
  |
  o  3:8e224524cd09 add x
  |
  o  0:1f0dee641bb7 add a
  

Trying to grab a public changeset

  $ hg phase -r 7c15c05db6fa -p

  $ hg grab -r 7c15c05db6fa
  abort: cannot grab public changesets: 7c15c05db6fa
  (see 'hg help phases' for details)
  [255]

  $ hg glog
  @  10:c437988de89f foo to b
  |
  o  8:44e155eb95c7 add c
  |
  o  7:2ccc03d1d096 foo to c
  |
  | o  5:7c15c05db6fa add b
  |/
  o  4:d46dc301d92f add y
  |
  o  3:8e224524cd09 add x
  |
  o  0:1f0dee641bb7 add a
  
Checking phase preservation while grabbing secret changeset

In case of merge conflicts

  $ hg phase -r 7c15c05db6fa -s -f

  $ hg grab -r 7c15c05db6fa
  grabbing 5:7c15c05db6fa "add b"
  merging b
  warning: conflicts while merging b! (edit, then use 'hg resolve --mark')
  unresolved merge conflicts (see hg help resolve)
  [1]

  $ echo bar > b
  $ hg resolve -m
  (no more unresolved files)
  continue: hg grab --continue

  $ hg grab --continue
  $ hg phase -r .
  11: secret

No merge conflicts

  $ hg up d46dc301d92f
  0 files updated, 0 files merged, 3 files removed, 0 files unresolved
  $ echo foo > l
  $ hg add l
  $ hg ci -qm "added l" --secret

  $ hg phase -r .
  12: secret

  $ hg glog
  @  12:508d572e7053 added l
  |
  | o  11:10427de9e26e add b
  | |
  | o  10:c437988de89f foo to b
  | |
  | o  8:44e155eb95c7 add c
  | |
  | o  7:2ccc03d1d096 foo to c
  |/
  o  4:d46dc301d92f add y
  |
  o  3:8e224524cd09 add x
  |
  o  0:1f0dee641bb7 add a
  
  $ hg up 10427de9e26e
  3 files updated, 0 files merged, 1 files removed, 0 files unresolved

  $ hg grab -r 508d572e7053
  grabbing 12:508d572e7053 "added l"

  $ hg phase -r .
  13: secret