Re: [PATCH v3 05/11] t0027: make hash size independent

["Torsten Bögershausen" <tboegi@web.de>]

On Wed, Aug 29, 2018 at 12:56:36AM +0000, brian m. carlson wrote:
> We transform various object IDs into all-zero object IDs for comparison.
> Adjust the length as well so that this works for all hash algorithms.
> 
> Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
> ---
>  t/t0027-auto-crlf.sh | 6 ++++--
>  1 file changed, 4 insertions(+), 2 deletions(-)
> 
> diff --git a/t/t0027-auto-crlf.sh b/t/t0027-auto-crlf.sh
> index beb5927f77..0f1235d9d1 100755
> --- a/t/t0027-auto-crlf.sh
> +++ b/t/t0027-auto-crlf.sh
> @@ -14,11 +14,13 @@ compare_files () {
>  compare_ws_file () {
>  	pfx=$1
>  	exp=$2.expect
> +	tmp=$2.tmp
>  	act=$pfx.actual.$3
> -	tr '\015\000abcdef0123456789' QN00000000000000000 <"$2" >"$exp" &&
> +	tr '\015\000abcdef0123456789' QN00000000000000000 <"$2" >"$tmp" &&
>  	tr '\015\000abcdef0123456789' QN00000000000000000 <"$3" >"$act" &&
> +	sed -e "s/0000*/$ZERO_OID/" "$tmp" >"$exp" &&
>  	test_cmp "$exp" "$act" &&
> -	rm "$exp" "$act"
> +	rm "$exp" "$act" "$tmp"
>  }
>  
>  create_gitattributes () {

I only managed to review the changes in t0027.
Out of interest: why do we use a "tmp" file here?
Would it make more sense  to chain the 'tr' with 'sed' and skip the
tmp file ?

 	tr '\015\000abcdef0123456789' QN00000000000000000 <"$2" |
	sed -e "s/0000*/$ZERO_OID/"  >"$exp" &&


Yes, we will loose the exit status of 'tr', I think.
How important is the exit status ?

I don't know, hopefully someone with more experience/knowledge
about shell scripting can help me out here.