A simple script to generate a graph cloud from a set of ruby stack
traces. Stack traces must be separated by a line consisting of '--',
the output of 'grep -A' on a log file containing these stack traces.
Depends on the ruby-graphviz gem, and, by extension, graphviz.
Usage: ruby-call-graph.rb -i INPUT -o OUTPUT [-t THRESHOLD]
-i, --input INPUT Input stack trace (- for stdin)
-o, --output OUTPUT Output filename
-t, --threshold THRESHOLD Edge/Node Count Threshold. Defaults to 100
-h, --help Show this message