view tests/test-unstable-orphan.t @ 5601:3946ee4ee3ae

topic: add a `exp….topic.linear-merge` option to allow some oedipus

If this option is set to `from-branch`, a user can call `hg merge some-topic`
from a bare branch even if `some-topic` is a direct descendant of the current
working copy parents. This was previously denied if the changesets was on the
same branch, since the result would be an "oedipus merge".

Some user have been requesting this, and this type of merge is one of Gitlab
standard way of merging a "Merge Request". That new option will unlock issue
`heptapod#200` and make this mode available for those who wants it.

==================================
Test for "orphan" type instability
==================================

This file gather test case around the "orphan" changeset instability. This
instability happens when a changesets has obsolete ancestors.

  $ cat >> $HGRCPATH <<EOF
  > [defaults]
  > amend=-d "0 0"
  > fold=-d "0 0"
  > [web]
  > push_ssl = false
  > allow_push = *
  > [phases]
  > publish = False
  > [diff]
  > git = 1
  > unified = 0
  > [ui]
  > logtemplate = {rev}:{node|short}@{branch}({phase}) {desc|firstline}\n
  > [extensions]
  > EOF
  $ echo "evolve=$(echo $(dirname $TESTDIR))/hgext3rd/evolve/" >> $HGRCPATH
  $ mkcommit() {
  >    echo "$1" > "$1"
  >    hg add "$1"
  >    hg ci -m "add $1"
  > }

  $ mkstack() {
  >    # Creates a stack of commit based on $1 with messages from $2, $3 ..
  >    hg update "$1" -C
  >    shift
  >    mkcommits $*
  > }

  $ mkcommits() {
  >   for i in $@; do mkcommit $i ; done
  > }

orphan parent is obsolete with a single successor
=================================================

Test orphan resolution for a changeset orphan because its parent is obsolete
with one successor.

  $ hg init test1
  $ cd test1
  $ mkcommits _a _b _c
  $ hg up "desc(_b)"
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ hg amend -m "bprime"
  1 new orphan changesets
  $ hg log -G
  @  3:36050226a9b9@default(draft) bprime
  |
  | *  2:102002290587@default(draft) add _c
  | |
  | x  1:37445b16603b@default(draft) add _b
  |/
  o  0:135f39f4bd78@default(draft) add _a
  

  $ hg evo --all --any --orphan
  move:[2] add _c
  atop:[3] bprime
  $ hg log -G
  o  4:fdcf3523a74d@default(draft) add _c
  |
  @  3:36050226a9b9@default(draft) bprime
  |
  o  0:135f39f4bd78@default(draft) add _a
  

  $ cd ..


orphan parent is obsolete with a multiple successors (reversed order)
=====================================================================

Test orphan resolution for a changeset orphan because its parent is obsolete
with multiple successors on the same branch but in reverse order (cross-split).

  $ hg init test5
  $ cd test5
  $ mkcommits _a _b _c
  $ hg up "desc(_a)"
  0 files updated, 0 files merged, 2 files removed, 0 files unresolved
  $ mkcommits bprimesplit1 bprimesplit2
  created new head
  $ hg prune "desc(_b)" -s "desc(bprimesplit1) + desc(bprimesplit2)" --split
  1 changesets pruned
  1 new orphan changesets
  $ hg up "desc(_a)"
  0 files updated, 0 files merged, 2 files removed, 0 files unresolved
  $ mkcommits bsecondsplit1 bsecondsplit2
  created new head
  $ hg prune "desc(bprimesplit1)" -s "desc(bsecondsplit2)"
  1 changesets pruned
  1 new orphan changesets
  $ hg prune "desc(bprimesplit2)" -s "desc(bsecondsplit1)"
  1 changesets pruned
  $ hg log -G
  @  6:59b942dbda14@default(draft) add bsecondsplit2
  |
  o  5:8ffdae67d696@default(draft) add bsecondsplit1
  |
  | *  2:102002290587@default(draft) add _c
  | |
  | x  1:37445b16603b@default(draft) add _b
  |/
  o  0:135f39f4bd78@default(draft) add _a
  

  $ hg evo --all --any --orphan
  move:[2] add _c
  atop:[6] add bsecondsplit2
  $ hg log -G
  o  7:98e3f21461ff@default(draft) add _c
  |
  @  6:59b942dbda14@default(draft) add bsecondsplit2
  |
  o  5:8ffdae67d696@default(draft) add bsecondsplit1
  |
  o  0:135f39f4bd78@default(draft) add _a
  

  $ cd ..