awk script for autmatic refactoring of groovy script from anon class style to closure style

scripts/convert-anon-class-to-closure.awk

@@ -0,0 +1,41 @@
+function leading_space() {
+    cnt = 0
+    split($0, chars, "")
+    for (i = 1; i < length(chars); i++) {
+        if (chars[i] ~ " ") {
+            cnt++
+        } else {
+            break;
+        }
+    }
+    return cnt
+}
+
+/processTarget.*new Magic.*Action()/ {
+    gsub(",new Magic.*Action\\(\\) {", ", {")
+    gsub("new Magic.*Action\\(\\) {", "{")
+    state = 1
+}
+
+# remove terminating }
+state == 2 && leading_space() == space - 4 {
+    state = 0
+    next
+}
+
+# remove one level of indentation
+state == 2 && leading_space() >= space {
+    sub("    ", "");
+}
+
+# remove doAction with just param
+state == 1 && /doAction/ {
+    gsub("public void doAction\\(", "")
+    gsub("\\) {", " ->")
+    space = leading_space() + 4;
+    state = 2
+}
+
+{
+    print $0
+}