Generate FILETYPES with AWK

It's better suited than the shell for this task.

Makefile

@@ -65,8 +65,8 @@ src/$(BINARY): $(OBJECTS)
 .c.o:
 	$(CC) -c $(CFLAGS) -DVERSION="\"$(VERSION)\"" -DCODENAME="\"$(CODENAME)\"" -DDEFAULT_ROOT="\"$(ROOT)\"" $< -o $@
 
-src/filetypes.h: src/filetypes.conf
-	sh src/filetypes.sh < src/filetypes.conf > $@
+src/filetypes.h: src/filetypes.conf src/filetypes.awk
+	awk -f src/filetypes.awk < src/filetypes.conf > $@
 
 src/bin2c: src/bin2c.c
 	$(CC) src/bin2c.c -o $@

src/filetypes.awk

@@ -0,0 +1,13 @@
+# Convert filetypes.conf to filetypes.h.
+
+BEGIN {
+    print "#define FILETYPES \\"
+}
+/^[^#]/ {
+    for (i = 2; i <= NF; ++i) {
+	printf "\t\"%s\", \"%s\", \\\n", $i, $1
+    }
+}
+END {
+    printf "\tNULL, NULL\n"
+}

src/filetypes.sh

@@ -1,21 +0,0 @@
-#!/bin/sh
-# script for conversion of filetypes.conf into filetypes.h
-# (called by Makefile before compilation)
-# (2020-1-16 // HB9KNS)
-cat <<EOH
-/* $outp autogenerated on `date -u` by $0 */
-
-#define FILETYPES \\
-EOH
-# slurp $inpt and get gopher type and list of extensions
-while read gtype exts
-do if ! test "$gtype" = "" -o "$gtype" = "#"
-# process extensions, removing trailing SPC,
-# prepending '"' and appending '","gophertype",' to each,
-# and prepending TAB and appending ' \'
- then echo $exts | sed -e "s/\([^ ][^ ]*\) */\"\1\",\"$gtype\",/g;s/^/	/;s/\$/ \\\\/"
- fi
-done
-cat <<EOF
-	NULL, NULL
-EOF