Change top-level versions.sh to stop recursing on explicit arguments

Author: tianon

versions.sh

@@ -1,11 +1,13 @@
 #!/usr/bin/env bash
 set -Eeuo pipefail
 
-dirs="$(find "$@" -type f -name versions.json -exec bash -Eeuo pipefail -c 'for d; do dir="$(dirname "${d#./}")"; printf " %q" "$dir"; done' -- '{}' +)"
-eval "set -- $dirs"
+if [ "$#" -eq 0 ]; then
+	dirs="$(find -type f -name versions.json -exec bash -Eeuo pipefail -c 'for d; do dir="$(dirname "${d#./}")"; printf " %q" "$dir"; done' -- '{}' +)"
+	eval "set -- $dirs"
+fi
 
 if [ "$#" -eq 0 ]; then
-	echo >&2 "error: failed to find any 'versions.json' files!"
+	echo >&2 "error: failed to find any 'versions.json' files (in args or '$PWD')!"
 	exit 1
 fi
 
@@ -14,7 +16,7 @@ for dir; do
 
 	script="$dir"
 	while [ ! -x "$script/versions.sh" ]; do
-		if [ "$script" = '.' ]; then
+		if [ "$script" = '.' ] || [ "$script" = '/' ]; then
 			echo >&2 "error: failed to find script for '$dir'!"
 			exit 1
 		fi