Re: [PATCH 4/8] bash: Add space after unique command name is completed.

From: Junio C Hamano <junkio@cox.net>
Date: Feb 4, 2007, 08:08 UTC
Message-ID: <7vr6t6xs3d.fsf@assigned-by-dhcp.cox.net>
In-Reply-To: <20070204073827.GD17603@spearce.org>

"Shawn O. Pearce" <spearce@spearce.org> writes:

Show 14 quoted lines

> +__gitcomp ()
> +{
> +	local all c s=$'\n' IFS=' '$'\t'$'\n'
> +	for c in $1; do
> +		case "$c" in
> +		--*=*) all="$all$c$s" ;;
> +		*)     all="$all$c $s" ;;
> +		esac
> +	done
> +	IFS=$s
> +	COMPREPLY=($(compgen -W "$all" -- "${COMP_WORDS[COMP_CWORD]}"))
> +	return
> +}
> +

I do not understand what is going on here.  Care to explain?

 (1) "for c in $1": because $1 is not dquoted, it is split into
     word with IFS -- which IFS applies to this splitting?  The
     local one you hand-define to the typical " \t\n" value?

 (2) when this function returns, what IFS value does the caller
     would have?  Is the "local" used to avoid screwing up the
     caller?