xorp: etc: templates: Add option for skipping click entry in fea.tp.raw

Added this option, so the created fea.tp would be without click code, when click is not compiled
in to the Xorp. This code works when click code starts with "click {". That's the case for now.

Signed-off-by: Igor Maravic <igorm@etf.rs>

xorp/etc/templates/SConscript

@@ -96,9 +96,13 @@ if env['enable_xorpsh']:
 def BuildXrlTemplate(target, source, env):
     #    base = tp[:-len('.raw')]
     skip_fw = False
+    skip_click = True
     if (env.has_key('disable_fw') and env['disable_fw']):
         skip_fw = True
 
+    if (env.has_key('enable_click') and env['enable_click']):
+        skip_click = False
+
     sfname = str(source[0])
 
     print "source: ", sfname
@@ -109,11 +113,27 @@ def BuildXrlTemplate(target, source, env):
 
     if sfname == 'etc/templates/fea.tp.raw':
         ignore_ln = re.compile(".*firewall.*")
+
+        opened_brackets = 0
+        opened_bracket_ln = re.compile(".*{.*")
+        closed_bracket_ln = re.compile(".*}.*")
+        click_ln = re.compile(".*click.*")
+
         for line in ifile.readlines():
-            if not (skip_fw and ignore_ln.match(line)):
-                if line[-1] == "\n":
-                    # trim trailing newline
-                    line = line[0 : -1]
+            if opened_brackets > 0:
+                if opened_bracket_ln.match(line):
+                    opened_brackets += 1
+                if closed_bracket_ln.match(line):
+                    opened_brackets -= 1
+                continue
+            if (skip_fw and ignore_ln.match(line)):
+                continue
+            if (skip_click and click_ln.match(line)):
+                opened_brackets = 1
+                continue
+            if line[-1] == "\n":
+                # trim trailing newline
+                line = line[0 : -1]
                 print >>ofile, "%s" % line
     else:
         return -1 # error