[PATCH 0/6 v5] allow "-" as a shorthand for "previous branch"

An updated version of the patch [1]. Discussion here[1] has been taken into account. The test for "-@{yesterday}" is there inside the log-shorthand test, it is commented out for now.

I have removed the redundant pieces of code in merge.c and revert.c as mentioned by Matthieu in [2]. As analysed by Junio[3], the same type of code inside checkout.c and worktree.c can not be removed because the appropriate functions inside revision.c are not called in their codepaths.

Thanks for your review of the previous versions, Junio and Matthieu!

[1]: 1487258054-32292-1-git-send-email-kannan.siddharth12@gmail.com [2]: vpqbmu768on.fsf@anie.imag.fr [3]: xmqq1sv1euob.fsf@gitster.mtv.corp.google.com

Siddharth Kannan (6):
  revision.c: do not update argv with unknown option
  revision.c: swap if/else blocks
  revision.c: args starting with "-" might be a revision
  sha1_name.c: teach get_sha1_1 "-" shorthand for "@{-1}"
  merge.c: delegate handling of "-" shorthand to revision.c:get_sha1
  revert.c: delegate handling of "-" shorthand to setup_revisions

 builtin/merge.c                   |   2 -
 builtin/revert.c                  |   2 -
 revision.c                        |  15 +++---
 sha1_name.c                       |   5 ++
 t/t3035-merge-hyphen-shorthand.sh |  33 ++++++++++++
 t/t3514-revert-shorthand.sh       |  25 +++++++++
 t/t4214-log-shorthand.sh          | 106 ++++++++++++++++++++++++++++++++++++++
 7 files changed, 178 insertions(+), 10 deletions(-)
 create mode 100755 t/t3035-merge-hyphen-shorthand.sh
 create mode 100755 t/t3514-revert-shorthand.sh
 create mode 100755 t/t4214-log-shorthand.sh