Re: [GUILT v3 12/31] "guilt header": more robust header selection.

> If you run something like "guilt header '.*'" the command would crash,
> because the grep comand that tries to ensure that the patch exist
> would detect a match, but the later code expected the match to be
> exact.
> 
> Fixed by comparing exact strings.
> 
> And as a creeping feature "guilt header" will now try to use the
> supplied patch name as an unachored regexp if no exact match was
> found.  If the regexp yields a unique match, it is used; if more than
> one patch matches, the names of all patches are listed and the command
> fails.  (Exercise left to the reader: generalized this so that "guilt
> push" also accepts a unique regular expression.)
> 
> Signed-off-by: Per Cederqvist <cederp@opera.com>
> ---
>  guilt-header | 29 ++++++++++++++++++++++++++---
>  1 file changed, 26 insertions(+), 3 deletions(-)
> 
> diff --git a/guilt-header b/guilt-header
> index 41e00cc..c3d24f9 100755
> --- a/guilt-header
> +++ b/guilt-header
> @@ -45,10 +45,33 @@ esac
>  [ -z "$patch" ] && die "No patches applied."
>  
>  # check that patch exists in the series
> -ret=`get_full_series | grep -e "^$patch\$" | wc -l`
> -if [ $ret -eq 0 ]; then
> -	die "Patch $patch is not in the series"
> +TMP_FULL_SERIES=`get_tmp_file series`
> +get_full_series > "$TMP_FULL_SERIES"
> +found_patch=
> +while read x; do
> +	if [ "$x" = "$patch" ]; then
> +		found_patch="$patch"
> +		break
> +	fi
> +done < "$TMP_FULL_SERIES"
> +if [ -z "$found_patch" ]; then
> +	TMP_MATCHES=`get_tmp_file series`
> +	grep "$patch" < "$TMP_FULL_SERIES" > "$TMP_MATCHES"
> +	nr=`wc -l < $TMP_MATCHES`
> +	if [ $nr -gt 1 ]; then
> +		echo "$patch does not uniquely identify a patch. Did you mean any of these?" >&2
> +		sed 's/^/  /' "$TMP_MATCHES" >&2
> +		rm -f "$TMP_MATCHES" "$TMP_FULL_SERIES"
> +		exit 1
> +	elif [ $nr -eq 0 ]; then
> +		rm -f "$TMP_MATCHES" "$TMP_FULL_SERIES"
> +		die "Patch $patch is not in the series"
> +	fi
> +	found_patch=`cat $TMP_MATCHES`
> +	rm -f "$TMP_MATCHES"
>  fi
> +rm -f "$TMP_FULL_SERIES"
> +patch="$found_patch"
>  
>  # FIXME: warn if we're editing an applied patch
>  
> -- 
> 1.8.3.1
>