Re: [PATCH 3/4] git-commit-am: Allow automatic rebasing to preserve empty commits

[Junio C Hamano <gitster@pobox.com>]

Neil Horman <nhorman@tuxdriver.com> writes:

> Using the keep_empy environment variable, this change allows git-commit-am to

Is it an environment variable?  I thought not.

> apply empty commits to the new branch we are rebasing to
>
> Signed-off-by: Neil Horman <nhorman@tuxdriver.com>
> CC: Jeff King <peff@peff.net>
> CC: Phil Hord <phil.hord@gmail.com>
> CC: Junio C Hamano <gitster@pobox.com>
> ---
>  git-rebase--am.sh |   20 +++++++++++++++-----
>  1 files changed, 15 insertions(+), 5 deletions(-)
>
> diff --git a/git-rebase--am.sh b/git-rebase--am.sh
> index c815a24..c1d1b60 100644
> --- a/git-rebase--am.sh
> +++ b/git-rebase--am.sh
> @@ -20,11 +20,21 @@ esac
>  
>  test -n "$rebase_root" && root_flag=--root
>  
> -git format-patch -k --stdout --full-index --ignore-if-in-upstream \
> -	--src-prefix=a/ --dst-prefix=b/ \
> -	--no-renames $root_flag "$revisions" |
> -git am $git_am_opt --rebasing --resolvemsg="$resolvemsg" &&
> -move_to_original_branch
> +if [ -n "$keep_empty" ]
> +then
> +	# we have to do this the hard way.  git format-patch completly squashes
> +	# empty commits and even if it didn't the format doesn't really lend
> +	# itself well to recording empty patches.  fortunately, cherry-pick
> +	# makes this easy
> +	git cherry-pick --keep-empty "$revisions" && move_to_original_branch
> +else
> +	git format-patch -k --stdout --full-index --ignore-if-in-upstream \
> +		--src-prefix=a/ --dst-prefix=b/ \
> +		--no-renames $root_flag "$revisions" |
> +	git am $git_am_opt --rebasing --resolvemsg="$resolvemsg" &&
> +	move_to_original_branch
> +fi

Factor out the "&& move_to_original_branch" at the end of then/else, like
this:

	if ...
        then
		...
        else
		...
        fi && move_to_original_branch

>  ret=$?
>  test 0 != $ret -a -d "$state_dir" && write_basic_state
>  exit $ret