improve years.html

The `bin/gen-years.sh` has been updated to include the abstract of the
winning entry.

Changed `bin/gen-years.sh` VERSION from "2.1.1 2025-06-06"
ta "2.2.0 2025-07-10".

Ran `make gen_years timestamp` to perform the above.

bin/gen-years.sh

@@ -106,7 +106,7 @@ export LC_ALL="C"
 
 # set variables referenced in the usage message
 #
-export VERSION="2.1.1 2025-06-06"
+export VERSION="2.2.0 2025-07-10"
 NAME=$(basename "$0")
 export NAME
 export V_FLAG=0
@@ -279,6 +279,70 @@ function output_award
 }
 
 
+# output_abstract
+#
+# Write the abstract name to standard output (stdout)
+#
+# usage:
+#       output_abstract YYYY/dir/.entry.json
+#
+# returns:
+#       0 ==> no errors detected, but output may be empty
+#     > 0 ==> function error number
+#
+function output_abstract
+{
+    local ENTRY_JSON_PATH;	# the .entry.json path
+    local PATTERN;		# XPath for JSON pattern
+    local ABSTRACT;		# extracted abstract from .entry.json
+
+    # parse args
+    #
+    if [[ $# -ne 1 ]]; then
+        echo "$0: ERROR: in output_abstract: expected 1 arg, found $#" 1>&2
+        return 1
+    fi
+    ENTRY_JSON_PATH="$1"
+    if [[ ! -e $ENTRY_JSON_PATH ]]; then
+        echo "$0: ERROR: in output_abstract: .entry.json does not exist: $ENTRY_JSON_PATH" 1>&2
+        return 2
+    fi
+    if [[ ! -f $ENTRY_JSON_PATH ]]; then
+        echo "$0: ERROR: in output_abstract: .entry.json is not a file: $ENTRY_JSON_PATH" 1>&2
+        return 3
+    fi
+    if [[ ! -r $ENTRY_JSON_PATH ]]; then
+        echo "$0: ERROR: in output_abstract: .entry.json is not a readable file: $ENTRY_JSON_PATH" 1>&2
+        return 4
+    fi
+
+    # obtain the abstract string
+    #
+    PATTERN='$..abstract'
+    if [[ $V_FLAG -ge 5 ]]; then
+	echo  "$0: debug[5]: about to run: $JVAL_WRAPPER -b -q -- $ENTRY_JSON_PATH '$PATTERN' | $JSTRDECODE -d -q -N -" 1>&2
+    fi
+    export ABSTRACT
+    ABSTRACT=$("$JVAL_WRAPPER" -b -q "$ENTRY_JSON_PATH" "$PATTERN" | "$JSTRDECODE" -d -q -N -)
+    status_codes=("${PIPESTATUS[@]}")
+    if [[ ${status_codes[*]} =~ [1-9] || -z $ABSTRACT ]]; then
+	echo "$0: ERROR: in output_abstract: $JVAL_WRAPPER -b -q -- $ENTRY_JSON_PATH '$PATTERN' | $JSTRDECODE -d -q -N - failed," \
+	     "error codes: ${status_codes[*]}" 1>&2
+	return 5
+    fi
+    if [[ ${#ABSTRACT} -ge 65 ]]; then
+	echo "$0: ERROR: in output_abstract: abstract length ${#ABSTRACT} >= 65 in $ENTRY_JSON_PATH" 1>&2
+	return 6
+    fi
+    if [[ $ABSTRACT =~ [\;$,] ]]; then
+	echo "$0: ERROR: in output_abstract: abstract contains ; or & or , in $ENTRY_JSON_PATH" 1>&2
+	return 7
+    fi
+    echo "${ABSTRACT//[;&,]/}"
+    return 0
+}
+
+
 # output_ordinal
 #
 # Write the numerical ordinal form of a non-negative integer to standard output (stdout)
@@ -1011,6 +1075,17 @@ for YYYY in $("$TAC_TOOL" "$TOP_FILE"); do
 	    continue
 	fi
 
+	# determine the abstract for this entry
+	#
+	ABSTRACT=$(output_abstract "$ENTRY_JSON")
+	status="$?"
+	if [[ $status -ne 0 || -z $ABSTRACT ]]; then
+	    echo "$0: ERROR: cannot find abstract in .entry.json: $ENTRY_JSON" 1>&2
+	    EXIT_CODE="7"  # exit 7
+	    echo "$0: Warning: EXIT_CODE set to: $EXIT_CODE" 1>&2
+	    continue
+	fi
+
 	# Verify $YYYY_DIR/README.md
 	#
 	if [[ ! -e $YYYY_DIR/README.md ]]; then
@@ -1026,7 +1101,7 @@ for YYYY in $("$TAC_TOOL" "$TOP_FILE"); do
 
 	# output markdown for this entry
 	#
-	echo "* <div id=\"${YEAR_DIR}_${ENTRY_DIR}\"><a class=\"normal\" href=\"$YYYY_DIR/index.html\">$YYYY_DIR</a> - $AWARD</div>"
+	echo "* <div id=\"${YEAR_DIR}_${ENTRY_DIR}\"><a class=\"normal\" href=\"$YYYY_DIR/index.html\">$YYYY_DIR</a> - $AWARD - <i>$ABSTRACT</i></div>"
     done | if [[ -z $NOOP ]]; then
         cat >> "$TMP_YEARS_MD"
     else