Felipe Contreras wrote:
> * ${1-} is the same as $1
| $ git log -S'${1-}' contrib/completion/git-completion.bash
| [...]
| commit 25a31f81
| Author: Ted Pavlic <ted@xxxxxxxxxxxxx>
| Date: Thu Jan 15 11:02:21 2009 -0500
|
| bash-completion: Support running when set -u is enabled
|
| Under "set -u" semantics, it is an error to access undefined variables.
| Some user environments may enable this setting in the interactive shell.
|
| In any context where the completion functions access an undefined
| variable, accessing a default empty string (aka "${1-}" instead of "$1")
| is a reasonable way to code the function, as it silences the undefined
| variable error while still supplying an empty string.
|
| In this patch, functions that should always take an argument still use
| $1. Functions that have optional arguments use ${1-}.
|
| Signed-off-by: Ted Pavlic <ted@xxxxxxxxxxxxx>
| Acked-by: Shawn O. Pearce <spearce@xxxxxxxxxxx>
| Signed-off-by: Junio C Hamano <gitster@xxxxxxxxx>
Hope that helps,
Jonathan
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