Re: [PATCH 1/2] git-submodule.sh: Support 'checkout' as a valid update command

> According to "Documentation/gitmodules.txt", 'checkout' is a valid
> 'submodule.<name>.update' command. Also "git-submodule.sh" refers to
> it and processes it correctly. Reflect commit 'ac1fbb' to support this
> syntax and also validates property values during 'update' command,
> issuing a warning if the value found is unknwon.

> ---
>  git-submodule.sh | 14 +++++++++++++-
>  1 file changed, 13 insertions(+), 1 deletion(-)
> 
> diff --git a/git-submodule.sh b/git-submodule.sh
> index 2677f2e..1d041a7 100755
> --- a/git-submodule.sh
> +++ b/git-submodule.sh
> @@ -622,7 +622,7 @@ cmd_init()
>  		   test -z "$(git config submodule."$name".update)"
>  		then
>  			case "$upd" in
> -			rebase | merge | none)
> +			checkout | rebase | merge | none)
>  				;; # known modes of updating
>  			*)
>  				echo >&2 "warning: unknown update mode '$upd' suggested for submodule '$name'"
> @@ -805,6 +805,18 @@ cmd_update()
>  			update_module=$update
>  		else
>  			update_module=$(git config submodule."$name".update)
> +			case "$update_module" in
> +			'')
> +				;; # Unset update mode
> +			checkout | rebase | merge | none)
> +				;; # Known update modes
> +			!*)
> +				;; # Custom update command
> +			*)
> +				update_module=
> +				echo >&2 "warning: invalid update mode for submodule '$name'"