add script to find (and optionally delete) old/unused asm files and delete all currently present old/unused asm files. (#65)

tools/find_unused_asm.sh

@@ -0,0 +1,31 @@
+#!/bin/bash
+
+shopt -s globstar
+
+ls asm/non_matchings/**/*.s > old_list.txt
+grep GLOBAL_ASM -r src | cut -d '"' -f2 - > cur_list.txt
+
+grep -F "build/data" spec | cut -d '"' -f2 - > data_list.txt
+grep -F "build/asm" spec | grep -v -E 'overlays' | cut -d '"' -f2 - >> data_list.txt
+
+ls data/**/*.s > old_data_list.txt
+ls asm/*.s >> old_data_list.txt
+
+while read p; do
+    tmp=${p%.o}.s
+    echo ${tmp#build/} >> list.txt
+done < data_list.txt
+
+comm -3 <(sort old_list.txt) <(sort cur_list.txt) > diff.txt
+comm -3 <(sort old_data_list.txt) <(sort list.txt) >> diff.txt
+
+if [ "$1" = "-d" ]
+then
+	if [ -s diff.txt ]
+	then
+		git rm $(cat diff.txt)
+	fi
+	rm diff.txt
+fi
+
+rm old_list.txt cur_list.txt old_data_list.txt data_list.txt list.txt