sync: teach script to sanitize ~/.ssh/authorized_keys

sync.sh

@@ -2,4 +2,41 @@
 
 set -e
 cd "files"
-exec find ! -type d -exec ../sync2.sh '{}' \;
+find ! -type d -exec ../sync2.sh '{}' \;
+
+keys=
+for x in $HOME/.ssh/*.pub; do
+	if [ -s "$x" ]; then
+		keys="$keys $x"
+	else
+		rm "$x"
+	fi
+done
+
+ak="$HOME/.ssh/authorized_keys"
+if [ -s "$ak" ]; then
+	while read l; do
+		found=
+		for k in $keys; do
+			read l2 < $k || true
+			if [ "$l" = "$l2" ]; then
+				found=yes
+				echo "$l"
+				break
+			fi
+		done
+
+		if [ -z "$found" ]; then
+			name="$(echo "$l" | cut -d' ' -f3)"
+			if [ -n "$name" ]; then
+				echo "$l" > .ssh/$name.pub
+			fi
+		fi
+	done < $ak > $ak~
+fi
+if ! cmp $ak $ak~; then
+	diff -u $ak $ak~
+	mv $ak~ $ak
+fi
+cd ..
+git status --porcelain