Re: [PATCH 2/7] contrib/subtree: Use %B for Split Subject/Body

> From: Techlive Zheng <techlivezheng@gmail.com>
>
> Use %B to format the commit message and body to avoid an extra newline
> if a commit only has a subject line.
>
> Signed-off-by: Techlive Zheng <techlivezheng@gmail.com>
>
> Signed-off-by: David A. Greene <greened@obbligato.org>
> ---
>  contrib/subtree/git-subtree.sh     |    6 +++++-
>  contrib/subtree/t/t7900-subtree.sh |   15 +++++++++++++++
>  2 files changed, 20 insertions(+), 1 deletion(-)
>
> diff --git a/contrib/subtree/git-subtree.sh b/contrib/subtree/git-subtree.sh
> index 920c664..5341b36 100755
> --- a/contrib/subtree/git-subtree.sh
> +++ b/contrib/subtree/git-subtree.sh
> @@ -296,7 +296,11 @@ copy_commit()
>         # We're going to set some environment vars here, so
>         # do it in a subshell to get rid of them safely later
>         debug copy_commit "{$1}" "{$2}" "{$3}"
> -       git log -1 --pretty=format:'%an%n%ae%n%ad%n%cn%n%ce%n%cd%n%s%n%n%b' "$1" |
> +       # Use %B rather than %s%n%n%b to handle the special case of a
> +       # commit that only has a subject line.  We don't want to
> +       # introduce a newline after the subject, causing generation of
> +       # a new hash.
> +       git log -1 --pretty=format:'%an%n%ae%n%ad%n%cn%n%ce%n%cd%n%B' "$1" |
>         (
>                 read GIT_AUTHOR_NAME
>                 read GIT_AUTHOR_EMAIL
> diff --git a/contrib/subtree/t/t7900-subtree.sh b/contrib/subtree/t/t7900-subtree.sh
> index 6cf9fb9..3f17f55 100755
> --- a/contrib/subtree/t/t7900-subtree.sh
> +++ b/contrib/subtree/t/t7900-subtree.sh
> @@ -74,6 +74,10 @@ test_expect_success 'add sub1' '
>          git branch -m master subproj
>  '
>
> +# Save this hash for testing later.
> +
> +subdir_hash=`git rev-parse HEAD`
> +
>  test_expect_success 'add sub2' '
>          create sub2 &&
>          git commit -m "sub2" &&
> @@ -211,6 +215,17 @@ test_expect_success 'check split with --branch' '
>          check_equal ''"$(git rev-parse splitbr1)"'' "$spl1"
>  '
>
> +test_expect_success 'check hash of split' '
> +        spl1=$(git subtree split --prefix subdir) &&
> +        undo &&
> +        git subtree split --prefix subdir --branch splitbr1test &&
> +        check_equal ''"$(git rev-parse splitbr1test)"'' "$spl1"
> +        git checkout splitbr1test &&
> +        new_hash=$(git rev-parse HEAD~2) &&
> +        git checkout mainline &&
> +        check_equal ''"$new_hash"'' "$subdir_hash"
> +'
> +

>  test_expect_success 'check split with --branch for an existing branch' '
>          spl1=''"$(git subtree split --annotate='"'*'"' --prefix subdir --onto FETCH_HEAD --message "Split & rejoin" --rejoin)"'' &&
>          undo &&
> --
> 1.7.10.4
>