#!/usr/bin/env python

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args_message = 'GRAPH_CONFIG_FILE...'
help_message = """Produce pretty graphs representing branches and merging.
For each config file specified, construct a graph and write it as a PNG file."""

import sys
from mergegraph import MergeDot


# If run as a program, process each input filename as a graph config file.
if __name__ == '__main__':
  prog_name = sys.argv[0]
  if len(sys.argv) == 1:
    usage = '%s: usage: "%s %s"' % (prog_name, prog_name, args_message)
    print >> sys.stderr, usage
    sys.exit(1)

  for config_filename in sys.argv[1:]:
    print prog_name + ": reading '" + config_filename + "',",
    graph = MergeDot(config_filename, rankdir='LR')
    print "writing '" + graph.filename + "'"
    graph.write_png(graph.filename)


@@ -1650,16 +1650,26 @@
 dir='LR'
+, dpi='72'
 )%0A    pr

* tools/dev/merge-graph.py Make the output images smaller than the default size by changing the PNG output resolution to 72dpi (default is 96).