ovsdb/ovsdb-dot.in

   1 #! @PYTHON@
   2
   3 from datetime import date
   4 import ovs.db.error
   5 import ovs.db.schema
   6 import getopt
   7 import os
   8 import re
   9 import sys
  10
  11 argv0 = sys.argv[0]
  12
  13 def printEdge(tableName, baseType, label):
  14     if baseType.ref_table:
  15         options = {}
  16         options['label'] = '"%s"' % label
  17         if baseType.ref_type == 'weak':
  18             options['constraint'] = 'false'
  19         print "\t%s -> %s [%s];" % (
  20             tableName,
  21             baseType.ref_table,
  22             ', '.join(['%s=%s' % (k,v) for k,v in options.items()]))
  23
  24 def schemaToDot(schemaFile):
  25     schema = ovs.db.schema.DbSchema.from_json(ovs.json.from_file(schemaFile))
  26
  27     print "digraph %s {" % schema.name
  28     for tableName, table in schema.tables.iteritems():
  29         print '\tsize="6.5,4";'
  30         print '\tmargin="0";'
  31         print "\tnode [shape=box];"
  32         print "\tedge [dir=none, arrowhead=none, arrowtail=none];"
  33         print "\t%s;" % tableName
  34         for columnName, column in table.columns.iteritems():
  35             if column.type.value:
  36                 printEdge(tableName, column.type.key, "%s key" % columnName)
  37                 printEdge(tableName, column.type.value, "%s value" % columnName)
  38             else:
  39                 printEdge(tableName, column.type.key, columnName)
  40     print "}";
  41
  42 def usage():
  43     print """\
  44 %(argv0)s: compiles ovsdb schemas to graphviz format
  45 Prints a .dot file that "dot" can render to an entity-relationship diagram
  46 usage: %(argv0)s [OPTIONS] SCHEMA
  47 where SCHEMA is an OVSDB schema in JSON format
  48
  49 The following options are also available:
  50   -h, --help                  display this help message
  51   -V, --version               display version information\
  52 """ % {'argv0': argv0}
  53     sys.exit(0)
  54
  55 if __name__ == "__main__":
  56     try:
  57         try:
  58             options, args = getopt.gnu_getopt(sys.argv[1:], 'hV',
  59                                               ['help', 'version'])
  60         except getopt.GetoptError, geo:
  61             sys.stderr.write("%s: %s\n" % (argv0, geo.msg))
  62             sys.exit(1)
  63
  64         for key, value in options:
  65             if key in ['-h', '--help']:
  66                 usage()
  67             elif key in ['-V', '--version']:
  68                 print "ovsdb-dot (Open vSwitch) @VERSION@"
  69             else:
  70                 sys.exit(0)
  71
  72         if len(args) != 1:
  73             sys.stderr.write("%s: exactly 1 non-option argument required "
  74                              "(use --help for help)\n" % argv0)
  75             sys.exit(1)
  76
  77         schemaToDot(args[0])
  78
  79     except ovs.db.error.Error, e:
  80         sys.stderr.write("%s: %s\n" % (argv0, e.msg))
  81         sys.exit(1)
  82
  83 # Local variables:
  84 # mode: python
  85 # End: