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merge: allow "-" as a short-hand for "previous branch"

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Just like "git checkout -" is a short-hand for "git checkout @{-1}" to
conveniently switch back to the previous branch, "git merge -" is a
short-hand for "git merge @{-1}" to conveniently merge the previous branch.

It will allow me to say:

    $ git checkout -b au/topic
    $ git am -s ./+au-topic.mbox
    $ git checkout pu
    $ git merge -

which is an extremely typical and repetitive operation during my git day.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Junio C Hamano 2011-04-07 15:57:57 -07:00
parent c3f6163b0b
commit 4e8115fff1
1 changed files with 6 additions and 3 deletions
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9
builtin/merge.c
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@ -1062,9 +1062,12 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
if (!allow_fast_forward && fast_forward_only)
die(_("You cannot combine --no-ff with --ff-only."));
if (!argc && !abort_current_merge && default_to_upstream)
argc = setup_with_upstream(&argv);
if (!abort_current_merge) {
if (!argc && default_to_upstream)
argc = setup_with_upstream(&argv);
else if (argc == 1 && !strcmp(argv[0], "-"))
argv[0] = "@{-1}";
}
if (!argc)
usage_with_options(builtin_merge_usage,
builtin_merge_options);