feat: use wordnet instead of spell to find English words

util/fp-finder/spell.sh

@@ -1,7 +1,36 @@
 #!/bin/bash
 
-if ! command -v spell > /dev/null 2>&1; then
-    echo "This program requires spell to be installed. Aborting"
+# This program uses WordNet to find English words. The WorNet license:
+
+# WordNet Release 3.0 This software and database is being provided to you,
+# the LICENSEE, by Princeton University under the following license.
+# By obtaining, using and/or copying this software and database, you agree that you have read,
+# understood, and will comply with these terms and conditions.: Permission to use, copy,
+# modify and distribute this software and database and its documentation for any purpose and
+# without fee or royalty is hereby granted, provided that you agree to comply with
+# the following copyright notice and statements, including the disclaimer, and that the same
+# appear on ALL copies of the software, database and documentation, including modifications
+# that you make for internal use or for distribution.
+# WordNet 3.0 Copyright 2006 by Princeton University.
+# All rights reserved.
+# THIS SOFTWARE AND DATABASE IS PROVIDED "AS IS" AND PRINCETON UNIVERSITY MAKES NO REPRESENTATIONS
+# OR WARRANTIES, EXPRESS OR IMPLIED. BY WAY OF EXAMPLE, BUT NOT LIMITATION, PRINCETON UNIVERSITY
+# MAKES NO REPRESENTATIONS OR WARRANTIES OF MERCHANT- ABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE
+# OR THAT THE USE OF THE LICENSED SOFTWARE, DATABASE OR DOCUMENTATION WILL NOT INFRINGE ANY THIRD
+# PARTY PATENTS, COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS.
+# The name of Princeton University or Princeton may not be used in advertising or publicity
+# pertaining to distribution of the software and/or database. Title to copyright in this
+# software, database and any associated documentation shall at all times remain with
+# Princeton University and LICENSEE agrees to preserve same.
+
+if ! command -v wn > /dev/null 2>&1; then
+    cat <<EOF
+This program requires WordNet to be installed. Aborting.
+
+The WordNet shell utility 'wn' can be obtained via the package
+manager of your choice (the package is usually called 'wordnet').
+EOF
+
     exit 1
 fi
 
@@ -14,8 +43,8 @@ check() {
     fi
 
     for word in $(grep -E '^[a-z]+$' "${datafile}" | uniq | sort); do
-        IS_NOT_ENGLISH=$(echo "${word}" | spell | wc -l)
-        if [ "${IS_NOT_ENGLISH}" -lt 1 ]; then
+        # wordnet exit code is equal to number of search results
+        if ! wn "${word}"> /dev/null 2>&1;  then
             if ! ${MACHINE_READABLE}; then
                 printf "   \`- found English word: "
             fi