comparison tests/test-topic.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.

5600:d77d61c9e5e9

  with topics to clients with the topic extension (version 9.3+). This might
  become the default in future:
  
    [experimental]
    topic.server-gate-topic-changesets = yes
  
  list of commands:
  
  Change organization:
  

5601:3946ee4ee3ae

  with topics to clients with the topic extension (version 9.3+). This might
  become the default in future:
  
    [experimental]
    topic.server-gate-topic-changesets = yes
  
  Explicitly merging in the target branch
  =======================================
  
  By default, Mercurial will not let your merge a topic into its target branch
  if that topic is already based on the head of that branch. In other word,
  Mercurial will not let your create a merge that will eventually have two
  parents in the same branches, one parent being the ancestors of the other
  parent. This behavior can be lifted using the following config:
  
    [experimental]
    topic.linear-merge = allow-from-bare-branch
  
  When this option is set to 'allow-from-bare-branch', it is possible to merge a
  topic branch from a bare branch (commit an active topic (eg: public one))
  regardless of the topology. The result would typically looks like that:
  
    @    summary: resulting merge commit
    |\   branch:  my-branch
    | |
    | o  summary: some more change in a topic, the merge "target"
    | |  branch:  my-branch
    | |  topic:   my-topic
    | |
    | o  summary: some change in a topic
    |/   branch:  my-branch
    |    topic:   my-topic
    |
    o    summary: previous head of the branch, the merge "source"
    |    branch:  my-branch
  
  list of commands:
  
  Change organization: