generate kconfig variables automatically

Change-Id: Iba70557100f49209edb6874251f93f79c2358737
Signed-off-by: Anas Nashif <anas.nashif@intel.com>

doc/Makefile

@@ -61,7 +61,11 @@ clean:
 	@rm -rf latex
 
 htmldocs: doxy html
-html:
+
+kconfig: scripts/genrest/genrest.py
+	srctree=../ SRCARCH=x86 python $< ../Kconfig reference/kconfig/
+
+html: kconfig
 	$(SPHINXBUILD) -b html $(ALLSPHINXOPTS) $(BUILDDIR)/html
 	@cp -a html $(BUILDDIR)/html/api
 	@echo

doc/scripts/genrest/genrest.py

@@ -0,0 +1,58 @@
+# Prints a tree of all items in the configuration
+# vim: tabstop=4 shiftwidth=4 expandtab
+
+import kconfiglib
+import sys
+
+# Integers representing symbol types
+UNKNOWN, BOOL, TRISTATE, STRING, HEX, INT = range(6)
+
+# Strings to use for types
+TYPENAME = {UNKNOWN: "unknown", BOOL: "bool", TRISTATE: "tristate",
+            STRING: "string", HEX: "hex", INT: "int"}
+
+
+def print_with_indent(s, indent):
+    print((" " * indent) + s)
+
+def print_items(items, outdir, indent):
+    for item in items:
+        if item.is_symbol() or item.is_choice():
+            text = item.get_help()
+        elif item.is_menu():
+            text = item.get_title()
+        else:
+            # Comment
+            text = item.get_text()
+        if item.is_symbol():
+            #print_with_indent("config {0}".format(item.get_name()), indent)
+
+            var = "CONFIG_%s" %item.get_name()
+            f.write("     kconfig/%s.rst\n" %var)
+            config = open("%s/%s.rst" % (outdir, var), "w")
+            config.write("\n.. _CONFIG_%s:\n" %item.get_name())
+            config.write("\n%s\n" %var)
+            config.write("%s\n\n" %(len("%s" %var) * '#' ))
+            if text:
+                config.write("\n%s\n\n" %text)
+            else:
+                config.write("\nThe configuration item %s:\n\n" %var)
+            config.write(item.rest())
+
+            config.close()
+        elif item.is_menu():
+            #print_with_indent('menu "{0}"'.format(item.get_title()), indent)
+            print_items(item.get_items(), outdir, indent + 2)
+        elif item.is_choice():
+            #print_with_indent('choice', indent)
+            print_items(item.get_items(), outdir, indent + 2)
+        elif item.is_comment():
+            pass
+            #print_with_indent('comment "{0}"'.format(item.get_text()), indent)
+
+
+f = open("%s/index.rst" % (sys.argv[2]), "w")
+f.write(".. toctree::\n     :maxdepth: 2\n\n")
+conf = kconfiglib.Config(sys.argv[1])
+print_items(conf.get_top_level_items(), sys.argv[2],  0)
+f.close()