view tests/test-topic-stack-complex.t @ 4728:ef8907df73fc stable

touch: fix the inconsistent behavior of divergence catching logic (issue6107)

When touching a node, the way we check if it can lead to divergence
is we look at the successors sets of the rev being touched. And if
there is successor revs exists (excluding the case when that successor
set is (A,) for rev A) that means there will be divergence and we warn
the user.
This works fine but there is still a case (which is not covered by looking
at successor sets) which can lead to divergence.

That case is: when there is already a revision exists which is divergent
to the revision being touched. And performing the touch would revive
that "dead" divergence. (Dead because one of the revision is obsolete which
is the one we are touching)

And to see if there is any rev which is divergent to a particular rev
we already have a function which we can use here
i.e. `evolvecmd.divergentsets(repo, ctx_being_touched)`

Changes in test file demonstrate the fixed behaviour.

Testing `hg stack` on complex cases when we have multiple successors because of
divergence, split etc.
  $ . "$TESTDIR/testlib/topic_setup.sh"

Setup

  $ cat << EOF >> $HGRCPATH
  > [experimental]
  > evolution = all
  > [ui]
  > interactive = True
  > [extensions]
  > show =
  > EOF
  $ echo "evolve=$(echo $(dirname $TESTDIR))/hgext3rd/evolve/" >> $HGRCPATH

  $ hg init test
  $ cd test
  $ echo foo > foo
  $ hg add foo
  $ hg ci -m "Added foo"
  $ hg phase -r . --public
  $ hg topic foo
  marked working directory as topic: foo
  $ echo a > a
  $ echo b > b
  $ hg ci -Aqm "Added a and b"
  $ echo c > c
  $ echo d > d
  $ hg ci -Aqm "Added c and d"
  $ echo e > e
  $ echo f > f
  $ hg ci -Aqm "Added e and f"
  $ hg show work
  @  f1d3 (foo) Added e and f
  o  8e82 (foo) Added c and d
  o  002b (foo) Added a and b
  o  f360 Added foo

Testing in case of split within the topic

  $ hg stack
  ### topic: foo
  ### target: default (branch)
  s3@ Added e and f (current)
  s2: Added c and d
  s1: Added a and b
  s0^ Added foo (base)
  $ hg prev
  0 files updated, 0 files merged, 2 files removed, 0 files unresolved
  [s2] Added c and d

  $ echo 0 > num
  $ cat > editor.sh << '__EOF__'
  > NUM=$(cat num)
  > NUM=`expr "$NUM" + 1`
  > echo "$NUM" > num
  > echo "split$NUM" > "$1"
  > __EOF__
  $ export HGEDITOR="\"sh\" \"editor.sh\""

  $ hg split << EOF
  > y
  > y
  > n
  > c
  > EOF
  0 files updated, 0 files merged, 2 files removed, 0 files unresolved
  adding c
  adding d
  diff --git a/c b/c
  new file mode 100644
  examine changes to 'c'? [Ynesfdaq?] y
  
  @@ -0,0 +1,1 @@
  +c
  record change 1/2 to 'c'? [Ynesfdaq?] y
  
  diff --git a/d b/d
  new file mode 100644
  examine changes to 'd'? [Ynesfdaq?] n
  
  continue splitting? [Ycdq?] c
  1 new orphan changesets

  $ hg stack
  ### topic: foo
  ### target: default (branch)
  s4$ Added e and f (orphan)
  s3@ split2 (current)
  s2: split1
  s1: Added a and b
  s0^ Added foo (base)

  $ hg show work
  @  5cce (foo) split2
  o  f26c (foo) split1
  | *  f1d3 (foo) Added e and f
  | x  8e82 (foo) Added c and d
  |/
  o  002b (foo) Added a and b
  o  f360 Added foo

  $ hg prev
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  [s2] split1
  $ echo foo > c
  $ hg diff
  diff -r f26c1b9addde c
  --- a/c	Thu Jan 01 00:00:00 1970 +0000
  +++ b/c	Thu Jan 01 00:00:00 1970 +0000
  @@ -1,1 +1,1 @@
  -c
  +foo

  $ hg amend
  1 new orphan changesets
  $ hg show work
  @  7d94 (foo) split1
  | *  5cce (foo) split2
  | x  f26c (foo) split1
  |/
  | *  f1d3 (foo) Added e and f
  | x  8e82 (foo) Added c and d
  |/
  o  002b (foo) Added a and b
  o  f360 Added foo

  $ hg stack
  ### topic: foo (2 heads)
  ### target: default (branch), 2 behind
  s4$ Added e and f (orphan)
  s3$ split2 (orphan)
  s2@ split1 (current)
  s1: Added a and b
  s0^ Added foo (base)

Test case with divergence
-------------------------

  $ hg evolve --all
  move:[s3] split2
  atop:[s2] split1
  move:[s4] Added e and f
  $ hg up s4
  3 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ hg id -r .
  ec94a1ed1330 tip
  $ hg up --hidden 'min(predecessors(.))'
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  updated to hidden changeset f1d3649d6a8b
  (hidden revision 'f1d3649d6a8b' was rewritten as: ec94a1ed1330)
  working directory parent is obsolete! (f1d3649d6a8b)
  (use 'hg evolve' to update to its successor: ec94a1ed1330)
  $ hg amend -d '0 1'
  1 new orphan changesets
  2 new content-divergent changesets
  $ hg rebase -r . -d ec94a1ed1330~1
  rebasing 9:eb3b16fef8ea "Added e and f" (tip foo)
  $ hg stack
  ### topic: foo (2 heads)
  ### target: default (branch)
  s5$ Added e and f (content divergent)
  s3^ split2 (base)
  s4@ Added e and f (content divergent current)
  s3: split2
  s2: split1
  s1: Added a and b
  s0^ Added foo (base)

  $ hg evolve --content-divergent -r ec94a1ed1330
  merge:[s5] Added e and f
  with: [s4] Added e and f
  base: [3] Added e and f
  0 files updated, 0 files merged, 0 files removed, 0 files unresolved
  working directory is now at 8faad6276dc6