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#!/usr/bin/env python
# Copyright (C) 2014 Yahoo! Inc. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
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)
# To get this installed you may have to follow:
# https://code.google.com/p/pydot/issues/detail?id=93 (until fixed).
import pydot
from ironic.common import states
def print_header(text):
print("*" * len(text))
print(text)
print("*" * len(text))
def map_color(text):
# If the text contains 'error'/'fail' then we'll return red...
if 'error' in text or 'fail' in text:
return 'red'
else:
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",
help="write output to FILE", metavar="FILE")
parser.add_option("-T", "--format", dest="format",
help="output in given format (default: png)",
default='png')
parser.add_option("--no-labels", dest="labels",
help="do not include labels",
action='store_false', default=True)
(options, args) = parser.parse_args()
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 = {}
if options.labels:
edge_attrs['label'] = "on_%s" % on_event
edge_color = map_color(on_event)
if edge_color:
edge_attrs['fontcolor'] = edge_color
g.add_edge(pydot.Edge(nodes[start_state], nodes[end_state],
**edge_attrs))
print_header(graph_name)
print(g.to_string().strip())
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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