[PATCH 2/3] new: standardize group name checking

["Darrick J. Wong" <djwong@kernel.org>]

From: Darrick J. Wong <djwong@kernel.org>

Use the same group name validation when reading group names from
standard input or from the command line.  Now that we require all group
names to be documented, there's no reason to leave these separate
requirements.

Signed-off-by: Darrick J. Wong <djwong@kernel.org>
---
 new |   68 +++++++++++++++++++++++++++++++++++++------------------------------
 1 file changed, 38 insertions(+), 30 deletions(-)


diff --git a/new b/new
index ea7cf25e..3a657d20 100755
--- a/new
+++ b/new
@@ -91,38 +91,46 @@ group_names() {
 	}' doc/group-names.txt
 }
 
+# Make sure that the new test's groups fit the correct format and are listed
+# in the group documentation file.
+check_groups() {
+	for g in "$@"; do
+		local inval="$(echo "${g}" | tr -d '[:lower:][:space:][:digit:]_')"
+		if [ -n "${inval}" ]; then
+			echo "Invalid characters in group(s): ${inval}"
+			echo "Only lower cases, digits and underscore are allowed in groups, separated by space"
+			return 1
+		elif ! group_names | grep -q -w "${g}"; then
+			echo "Warning: group \"${g}\" not defined in documentation"
+			return 1
+		fi
+	done
+
+	return 0
+}
+
 if [ $# -eq 0 ]; then
+	# interactive mode
 	prompt="Add to group(s) [other] (separate by space, ? for list): "
-    while true
-    do
-	read -p "${prompt}" ans || exit 1
-	test -z "${ans}" && ans=other
-	if [ "${ans}" = "?" ]; then
-	    echo $(group_names)
-	else
-	    # only allow lower cases, spaces, digits and underscore in group
-	    inval=`echo $ans | tr -d '[:lower:][:space:][:digit:]_'`
-	    if [ "$inval" != "" ]; then
-		echo "Invalid characters in group(s): $inval"
-		echo "Only lower cases, digits and underscore are allowed in groups, separated by space"
-		continue
-	    else
-		# remove redundant spaces/tabs
-		ans=`echo "$ans" | sed 's/\s\+/ /g'`
-		break
-	    fi
-	fi
-    done
+	while true; do
+		read -p "${prompt}" -a new_groups || exit 1
+		case "${#new_groups[@]}" in
+		0)
+			new_groups=("other")
+			;;
+		1)
+			if [ "${new_groups[0]}" = "?" ]; then
+				echo $(group_names)
+				continue
+			fi
+			;;
+		esac
+		check_groups "${new_groups[@]}" && break
+	done
 else
-    # expert mode, groups are on the command line
-    #
-    for g in $*
-    do
-	if ! grep -q "^$g" doc/group-names.txt; then
-	    echo "Warning: group \"$g\" not defined in documentation"
-	fi
-    done
-    ans="$*"
+	# expert mode, groups are on the command line
+	new_groups=("$@")
+	check_groups "${new_groups[@]}" || exit 1
 fi
 
 echo -n "Creating skeletal script for you to edit ..."
@@ -139,7 +147,7 @@ cat <<End-of-File >$tdir/$id
 # what am I here for?
 #
 . ./common/preamble
-_begin_fstest $ans
+_begin_fstest ${new_groups[@]}
 
 # Override the default cleanup function.
 # _cleanup()