From d078ba6efb78a39af166d1e246977d98d21c82d1 Mon Sep 17 00:00:00 2001
From: Ruby Loo <rloo@yahoo-inc.com>
Date: Tue, 28 Jul 2015 21:24:48 +0000
Subject: Use automaton's converters/pydot

This uses the automaton library's converters/pydot to
generate the state machine diagram.

Change-Id: I23888d035e108224fbd29b305f6dd418d584e54e
---
 tools/states_to_dot.py | 73 ++++++++++++++++----------------------------------
 1 file changed, 23 insertions(+), 50 deletions(-)

(limited to 'tools')

diff --git a/tools/states_to_dot.py b/tools/states_to_dot.py
index 2104a095c..9a159a006 100755
--- a/tools/states_to_dot.py
+++ b/tools/states_to_dot.py
@@ -18,14 +18,13 @@ import optparse
 import os
 import sys
 
-top_dir = os.path.abspath(os.path.join(os.path.dirname(__file__),
-                                       os.pardir))
-sys.path.insert(0, top_dir)
-
-import pydot
+from automaton.converters import pydot
 
 from ironic.common import states
 
+top_dir = os.path.abspath(os.path.join(os.path.dirname(__file__),
+                                       os.pardir))
+sys.path.insert(0, top_dir)
 
 def print_header(text):
     print("*" * len(text))
@@ -41,14 +40,6 @@ def map_color(text):
         return None
 
 
-def format_state(state):
-    # Changes a state (mainly NOSTATE which is the None object) into
-    # a nicer string...
-    if state == states.NOSTATE:
-        state = 'no-state'
-    return state
-
-
 def main():
     parser = optparse.OptionParser()
     parser.add_option("-f", "--file", dest="filename",
@@ -63,41 +54,27 @@ def main():
     if options.filename is None:
         options.filename = 'states.%s' % options.format
 
-    source = states.machine
-    graph_name = '"Ironic states"'
-    g = pydot.Dot(graph_name=graph_name, rankdir='LR',
-                  nodesep='0.25', overlap='false',
-                  ranksep="0.5", splines='true',
-                  ordering='in')
-    node_attrs = {
-        'fontsize': '11',
-    }
-    nodes = {}
-    for (start_state, on_event, end_state) in source:
-        start_state = format_state(start_state)
-        end_state = format_state(end_state)
-        if start_state not in nodes:
-            start_node_attrs = node_attrs.copy()
-            text_color = map_color(start_state)
-            if text_color:
-                start_node_attrs['fontcolor'] = text_color
-            nodes[start_state] = pydot.Node(start_state, **start_node_attrs)
-            g.add_node(nodes[start_state])
-        if end_state not in nodes:
-            end_node_attrs = node_attrs.copy()
-            text_color = map_color(end_state)
-            if text_color:
-                end_node_attrs['fontcolor'] = text_color
-            nodes[end_state] = pydot.Node(end_state, **end_node_attrs)
-            g.add_node(nodes[end_state])
-        edge_attrs = {}
+    def node_attrs(state):
+        attrs = {}
+        text_color = map_color(state)
+        if text_color:
+            attrs['fontcolor'] = text_color
+        return attrs
+
+    def edge_attrs(start_state, event, end_state):
+        attrs = {}
         if options.labels:
-            edge_attrs['label'] = "on_%s" % on_event
-            edge_color = map_color(on_event)
+            attrs['label'] = "on_%s" % event
+            edge_color = map_color(event)
             if edge_color:
-                edge_attrs['fontcolor'] = edge_color
-        g.add_edge(pydot.Edge(nodes[start_state], nodes[end_state],
-                              **edge_attrs))
+                attrs['fontcolor'] = edge_color
+        return attrs
+
+    source = states.machine
+    graph_name = '"Ironic states"'
+    graph_attrs = {'size': 0}
+    g = pydot.convert(source, graph_name, graph_attrs=graph_attrs,
+                      node_attrs_cb=node_attrs, edge_attrs_cb=edge_attrs)
 
     print_header(graph_name)
     print(g.to_string().strip())
@@ -105,10 +82,6 @@ def main():
     g.write(options.filename, format=options.format)
     print_header("Created %s at '%s'" % (options.format, options.filename))
 
-    # To make the svg more pretty use the following:
-    # $ xsltproc ../diagram-tools/notugly.xsl ./states.svg > pretty-states.svg
-    # Get diagram-tools from https://github.com/vidarh/diagram-tools.git
-
 
 if __name__ == '__main__':
     main()
-- 
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