3 from datetime import date
13 def printEdge(tableName, type, baseType, label):
14 if baseType.ref_table_name:
18 elif type.n_max == sys.maxint:
21 arity = "{,%d}" % type.n_max
25 elif type.n_max == sys.maxint:
28 arity = "{1,%d}" % type.n_max
31 options['label'] = '"%s%s"' % (label, arity)
32 if baseType.ref_type == 'weak':
33 options['style'] = 'dotted'
34 print "\t%s -> %s [%s];" % (
36 baseType.ref_table_name,
37 ', '.join(['%s=%s' % (k,v) for k,v in options.items()]))
39 def schemaToDot(schemaFile, arrows):
40 schema = ovs.db.schema.DbSchema.from_json(ovs.json.from_file(schemaFile))
42 print "digraph %s {" % schema.name
44 print '\tsize="6.5,4";'
46 print "\tnode [shape=box];"
48 print "\tedge [dir=none, arrowhead=none, arrowtail=none];"
49 for tableName, table in schema.tables.iteritems():
52 options['style'] = 'bold'
53 print "\t%s [%s];" % (
55 ', '.join(['%s=%s' % (k,v) for k,v in options.items()]))
56 for columnName, column in table.columns.iteritems():
58 printEdge(tableName, column.type, column.type.key, "%s key" % columnName)
59 printEdge(tableName, column.type, column.type.value, "%s value" % columnName)
61 printEdge(tableName, column.type, column.type.key, columnName)
66 %(argv0)s: compiles ovsdb schemas to graphviz format
67 Prints a .dot file that "dot" can render to an entity-relationship diagram
68 usage: %(argv0)s [OPTIONS] SCHEMA
69 where SCHEMA is an OVSDB schema in JSON format
71 The following options are also available:
72 --no-arrows omit arrows from diagram
73 -h, --help display this help message
74 -V, --version display version information\
75 """ % {'argv0': argv0}
78 if __name__ == "__main__":
81 options, args = getopt.gnu_getopt(sys.argv[1:], 'hV',
84 except getopt.GetoptError, geo:
85 sys.stderr.write("%s: %s\n" % (argv0, geo.msg))
89 for key, value in options:
90 if key == '--no-arrows':
92 elif key in ['-h', '--help']:
94 elif key in ['-V', '--version']:
95 print "ovsdb-dot (Open vSwitch) @VERSION@"
100 sys.stderr.write("%s: exactly 1 non-option argument required "
101 "(use --help for help)\n" % argv0)
104 schemaToDot(args[0], arrows)
106 except ovs.db.error.Error, e:
107 sys.stderr.write("%s: %s\n" % (argv0, e.msg))