view tests/test-evolve-orphan-split.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.

** Testing resolution of orphans by `hg evolve` where an obsolete changeset has
multiple successors **

  $ cat >> $HGRCPATH <<EOF
  > [ui]
  > interactive = True
  > [alias]
  > glog = log -GT "{rev}:{node|short} {desc}\n ({bookmarks}) {phase}"
  > [extensions]
  > rebase =
  > EOF
  $ echo "evolve=$(echo $(dirname $TESTDIR))/hgext3rd/evolve/" >> $HGRCPATH

Repo Setup

  $ hg init repo
  $ cd repo
  $ echo ".*\.orig" > .hgignore
  $ hg add .hgignore
  $ hg ci -m "added hgignore"

An orphan changeset with parent got splitted
--------------------------------------------

  $ for ch in a b c; do echo foo > $ch; done;

  $ hg add a b
  $ hg ci -m "added a and b"
  $ hg add c
  $ hg ci -m "added c"

  $ hg glog
  @  2:86e1ebf1ca61 added c
  |   () draft
  o  1:d0ddb614efbd added a and b
  |   () draft
  o  0:8fa14d15e168 added hgignore
      () draft

  $ hg split -r 1 <<EOF
  > y
  > y
  > n
  > y
  > EOF
  0 files updated, 0 files merged, 3 files removed, 0 files unresolved
  adding a
  adding b
  diff --git a/a b/a
  new file mode 100644
  examine changes to 'a'? [Ynesfdaq?] y
  
  @@ -0,0 +1,1 @@
  +foo
  record change 1/2 to 'a'? [Ynesfdaq?] y
  
  diff --git a/b b/b
  new file mode 100644
  examine changes to 'b'? [Ynesfdaq?] n
  
  created new head
  Done splitting? [yN] y
  1 new orphan changesets

  $ hg glog
  @  4:8b179cffc81c added a and b
  |   () draft
  o  3:bd3735d4dab0 added a and b
  |   () draft
  | *  2:86e1ebf1ca61 added c
  | |   () draft
  | x  1:d0ddb614efbd added a and b
  |/    () draft
  o  0:8fa14d15e168 added hgignore
      () draft

  $ hg evolve
  move:[2] added c
  atop:[4] added a and b
  working directory is now at af13f0560b31

  $ hg glog
  @  5:af13f0560b31 added c
  |   () draft
  o  4:8b179cffc81c added a and b
  |   () draft
  o  3:bd3735d4dab0 added a and b
  |   () draft
  o  0:8fa14d15e168 added hgignore
      () draft

When the successors does not form a linear chain and are multiple heads
-----------------------------------------------------------------------

  $ hg fold -r .^^::. --exact -m "added a b c"
  3 changesets folded
  0 files updated, 0 files merged, 0 files removed, 0 files unresolved

  $ hg glog
  @  6:f89e4764f2ed added a b c
  |   () draft
  o  0:8fa14d15e168 added hgignore
      () draft
  $ echo foo > d
  $ hg ci -Aqm "added d"

  $ hg glog
  @  7:d48a30875f01 added d
  |   () draft
  o  6:f89e4764f2ed added a b c
  |   () draft
  o  0:8fa14d15e168 added hgignore
      () draft
  $ hg prev
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  [6] added a b c
  $ hg split -r . <<EOF
  > y
  > n
  > y
  > y
  > y
  > y
  > y
  > EOF
  0 files updated, 0 files merged, 3 files removed, 0 files unresolved
  adding a
  adding b
  adding c
  diff --git a/a b/a
  new file mode 100644
  examine changes to 'a'? [Ynesfdaq?] y
  
  @@ -0,0 +1,1 @@
  +foo
  record change 1/3 to 'a'? [Ynesfdaq?] n
  
  diff --git a/b b/b
  new file mode 100644
  examine changes to 'b'? [Ynesfdaq?] y
  
  @@ -0,0 +1,1 @@
  +foo
  record change 2/3 to 'b'? [Ynesfdaq?] y
  
  diff --git a/c b/c
  new file mode 100644
  examine changes to 'c'? [Ynesfdaq?] y
  
  @@ -0,0 +1,1 @@
  +foo
  record change 3/3 to 'c'? [Ynesfdaq?] y
  
  created new head
  Done splitting? [yN] y
  1 new orphan changesets

  $ hg glog
  @  9:c0fbf8aaf6c4 added a b c
  |   () draft
  o  8:f2632392aefe added a b c
  |   () draft
  | *  7:d48a30875f01 added d
  | |   () draft
  | x  6:f89e4764f2ed added a b c
  |/    () draft
  o  0:8fa14d15e168 added hgignore
      () draft

  $ hg rebase -r . -d 8fa14d15e168
  rebasing 9:c0fbf8aaf6c4 "added a b c" (tip)
  $ hg glog
  @  10:7f87764e5b64 added a b c
  |   () draft
  | o  8:f2632392aefe added a b c
  |/    () draft
  | *  7:d48a30875f01 added d
  | |   () draft
  | x  6:f89e4764f2ed added a b c
  |/    () draft
  o  0:8fa14d15e168 added hgignore
      () draft

  $ hg evolve --dry-run <<EOF
  > 0
  > EOF
  ancestor 'd48a30875f01' split over multiple topological branches.
  choose an evolve destination:
  0: [f2632392aefe] added a b c
  1: [7f87764e5b64] added a b c
  q: quit the prompt
  enter the index of the revision you want to select: 0
  move:[7] added d
  atop:[8] added a b c
  hg rebase -r d48a30875f01 -d f2632392aefe

  $ hg evolve --dry-run <<EOF
  > 1
  > EOF
  ancestor 'd48a30875f01' split over multiple topological branches.
  choose an evolve destination:
  0: [f2632392aefe] added a b c
  1: [7f87764e5b64] added a b c
  q: quit the prompt
  enter the index of the revision you want to select: 1
  move:[7] added d
  atop:[10] added a b c
  hg rebase -r d48a30875f01 -d 7f87764e5b64

Testing the interactive prompt with invalid values first
(this should move its own test file when we use it at multiple places)

  $ hg evolve --all <<EOF
  > foo
  > EOF
  ancestor 'd48a30875f01' split over multiple topological branches.
  choose an evolve destination:
  0: [f2632392aefe] added a b c
  1: [7f87764e5b64] added a b c
  q: quit the prompt
  enter the index of the revision you want to select: foo
  invalid value 'foo' entered for index
  could not solve instability, ambiguous destination: parent split across two branches

  $ hg evolve --all <<EOF
  > 4
  > EOF
  ancestor 'd48a30875f01' split over multiple topological branches.
  choose an evolve destination:
  0: [f2632392aefe] added a b c
  1: [7f87764e5b64] added a b c
  q: quit the prompt
  enter the index of the revision you want to select: 4
  invalid value '4' entered for index
  could not solve instability, ambiguous destination: parent split across two branches

  $ hg evolve --all <<EOF
  > -1
  > EOF
  ancestor 'd48a30875f01' split over multiple topological branches.
  choose an evolve destination:
  0: [f2632392aefe] added a b c
  1: [7f87764e5b64] added a b c
  q: quit the prompt
  enter the index of the revision you want to select: -1
  invalid value '-1' entered for index
  could not solve instability, ambiguous destination: parent split across two branches

  $ hg evolve --all <<EOF
  > q
  > EOF
  ancestor 'd48a30875f01' split over multiple topological branches.
  choose an evolve destination:
  0: [f2632392aefe] added a b c
  1: [7f87764e5b64] added a b c
  q: quit the prompt
  enter the index of the revision you want to select: q
  could not solve instability, ambiguous destination: parent split across two branches

Doing the evolve with the interactive prompt

  $ hg evolve --all <<EOF
  > 1
  > EOF
  ancestor 'd48a30875f01' split over multiple topological branches.
  choose an evolve destination:
  0: [f2632392aefe] added a b c
  1: [7f87764e5b64] added a b c
  q: quit the prompt
  enter the index of the revision you want to select: 1
  move:[7] added d
  atop:[10] added a b c
  working directory is now at 1c6caa7c902a