UPSTREAM: board_status/to-wiki: Update bucketize script

- Fix TODO: restrict $1 to allowed values.
- Specifically exclude 'oem' board status directories.
- Exclude any directory that doesn't follow the date format to keep
the script from breaking again in the future if something it doesn't
recognize is pushed.  Just ignore it for the wiki.
- Fix shellcheck warnings.

BUG=none
BRANCH=none
TEST=none

Change-Id: I55cee2d8a6fc1a605d77f6cc6d9eb9e2defa4872
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: 27f3ce6337
Original-Change-Id: I2864f09f5f1b1f5ec626d06e4849830400ef5814
Original-Signed-off-by: Martin Roth <martinroth@google.com>
Original-Reviewed-on: https://review.coreboot.org/18225
Original-Tested-by: build bot (Jenkins)
Original-Reviewed-by: Timothy Pearson <tpearson@raptorengineering.com>
Original-Reviewed-by: Patrick Georgi <pgeorgi@google.com>
Original-Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-on: https://chromium-review.googlesource.com/433884

util/board_status/to-wiki/bucketize.sh

@@ -4,30 +4,42 @@
 #   into buckets of the given granularity
 
 weekly() {
-	date --date="$1" +%GW%V
+	date --date="$1" +%GW%V 2>/dev/null
+	return $?
 }
 
 monthly() {
-	date --date="$1" +%Y-%m
+	date --date="$1" +%Y-%m 2>/dev/null
+	return $?
 }
 
 quarterly() {
-	date --date="$1" "+%Y %m"  | awk '{ q=int(($2-1)/3+1); print $1 "Q" q}'
+	date --date="$1" "+%Y %m"  2>/dev/null | awk '{ q=int(($2-1)/3+1); print $1 "Q" q}'
+	return $?
 }
 
-# TODO: restrict $1 to allowed values
+# Restrict $1 to allowed values
+if [ "$1" != "weekly" ] && [ "$1" != "monthly" ] && [ "$1" != "quarterly" ]; then
+	exit 1
+fi
 
 curr=""
 sort -r -k4 -t/ | while read file; do
-	timestamp=`printf $file | cut -d/ -f4 | tr _ :`
-	new=`$1 $timestamp`
+	# Exclude 'oem' directories
+	if echo "$file" | grep -q '/oem/'; then continue; fi
+	timestamp=$(printf "%s" "$file" | cut -d/ -f4 | tr _ :)
+
+	# If the directory is not a date, skip it.
+	new=$($1 "$timestamp");retval=$?
+	if [ "$retval" != "0" ]; then continue; fi
+
 	if [ "$new" != "$curr" ]; then
 		if [ "$curr" != "" ]; then
 			printf "\n"
 		fi
-		printf "$new:"
+		printf "%s:" "$new"
 		curr=$new
 	fi
-	printf "$file "
+	printf "%s " "$file"
 done
 printf "\n"