Add new prompt output element "missingups"

A previous behavior of the %{remote} prompt feature was to print
something like "git:(upstream⚡branch)" if the branch had never been
pushed to the remote.  This patch addresses this case to both clean up
the prompt appearance and change the semantics of this warning.

In my own opinion, it is quite a normal workflow to be spinning off
local-only branches, whether they are short lived or not, and giving a
noisy warning that "branch" has no remote counterpart is distracting and
counter productive.  However, a situation that _is worth_ warning the
user about is the case when a branch _has been pushed to a remote_ (eg:
it has a remote and merge-target configured), but this remote
counterpart branch was unexpectedly removed.  This is when git-status
says "Your branch is based on ..., but the upstream is gone."

So, separate this specific warning into a new prompt feature:
%{missingups} (missing upstream), which simply shows the lightning bolt
character when a configured upstream branch is missing.  Remove this
case from %{remote}, which is now quiet when the upstream is removed
(even if a remote-tracking branch is configured).  This separation to a
new element makes it possible to still see this warning if opting out of
the remote-commits feature.

Signed-off-by: Matt Hunter <m@lfurio.us>

0 files changed, 0 insertions, 0 deletions