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#!/usr/bin/env python
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 optparse
import subprocess
import tempfile
from taskflow import states
from taskflow.types import graph as gr
def mini_exec(cmd, ok_codes=(0,)):
stdout = subprocess.PIPE
stderr = subprocess.PIPE
proc = subprocess.Popen(cmd, stdout=stdout, stderr=stderr, stdin=None)
(stdout, stderr) = proc.communicate()
rc = proc.returncode
if rc not in ok_codes:
raise RuntimeError("Could not run %s [%s]\nStderr: %s"
% (cmd, rc, stderr))
return (stdout, stderr)
def make_svg(graph, output_filename, output_format):
# NOTE(harlowja): requires pydot!
gdot = graph.export_to_dot()
if output_format == 'dot':
output = gdot
elif output_format in ('svg', 'svgz', 'png'):
with tempfile.NamedTemporaryFile(suffix=".dot") as fh:
fh.write(gdot)
fh.flush()
cmd = ['dot', '-T%s' % output_format, fh.name]
output, _stderr = mini_exec(cmd)
else:
raise ValueError('Unknown format: %s' % output_filename)
with open(output_filename, "wb") as fh:
fh.write(output)
def main():
parser = optparse.OptionParser()
parser.add_option("-f", "--file", dest="filename",
help="write svg to FILE", metavar="FILE")
parser.add_option("-t", "--tasks", dest="tasks",
action='store_true',
help="use task state transitions",
default=False)
parser.add_option("-T", "--format", dest="format",
help="output in given format",
default='svg')
(options, args) = parser.parse_args()
if options.filename is None:
options.filename = 'states.%s' % options.format
g = gr.DiGraph(name="State transitions")
if not options.tasks:
source = states._ALLOWED_FLOW_TRANSITIONS
else:
source = states._ALLOWED_TASK_TRANSITIONS
for (u, v) in source:
if not g.has_node(u):
g.add_node(u)
if not g.has_node(v):
g.add_node(v)
g.add_edge(u, v)
make_svg(g, options.filename, options.format)
print("Created %s at '%s'" % (options.format, options.filename))
if __name__ == '__main__':
main()
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