annotate tests/test-topic-shell-prompt.t @ 6935:954d7ea5cd67 stable tip

stack: when stack base is obsolete, pick any successor, even if at random

There are situations when s0 is obsolete and we also cannot pick just one
successor for it to use in stack. In such a case, let's pick the "latest"
successor from the first set.

We're assuming that obsutil.successorssets() returns data in the same order (it
should, since it makes sure to sort data internally). Keeping that in mind,
while the successor picked for s0 by this code is not based on any sort of
sophisticated logic, it should nonetheless be the same every time.

This patch is probably not going to completely break anything that was
previously working fine, because the previous behavior was to just abort with
an exception.

  $ . $TESTDIR/testlib/topic_setup.sh

Code logically equivalent to the following is used in Zsh to show the branch
and topic (if set) in the prompt. If the format of the files is changed in a
way that it breaks the test, a mail should be sent to [e-mail].

  $ get_branch_like_zsh() {
  >     branchfile=".hg/branch"
  >     topicfile=".hg/topic"
  >     if [ -r "${branchfile}" ] ; then
  >         r_branch=$(cat "${branchfile}")
  >     fi
  >     if [ -f "${topicfile}" ] && [ -r "${topicfile}" ] && [ -s "${topicfile}" ] ; then
  >         IFS= read -r REPLY < ${topicfile}
  >         r_branch=${r_branch}:${REPLY}
  >     fi
  >     echo $r_branch
  > }

  $ hg init
  $ hg branch branch -q
  $ get_branch_like_zsh
  branch
  $ hg topic topic -q
  $ get_branch_like_zsh
  branch:topic
  $ hg topic --clear -q
  $ get_branch_like_zsh
  branch