Re: [PATCH] filter-branch: consider refs can refer to an object other than commit or tag

> However, if we pre-filter to limit the refs in "$tempdir/heads" to
> those that are committish (i.e. those that pass "$ref^0") like the
> patch and subsequent discussion suggests, wouldn't we lose the
> warning for these replace refs and non-committish tags.  We perhaps
> could do something like:
> 
> 	git rev-parse --no-flags ... >"$tempdir/raw-heads" || exit
> 
> 	while read ref
> 	do
> 		case "$ref" in ^?*) continue ;; esac
> 		if git rev-parse --verify "$ref^0" 2>/dev/null
>                 then
> 			echo "$ref"
> 		else
> 			warn "WARNING: not rewriting '$ref' (not a committish)"
> 		fi
> 	done >"$tempdir/heads" <"$tempdir/raw-heads"
> 
> (note: the else clause is new, relative to my earlier suggestion).