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#!/bin/bash

# Create a header dependency graph from the source files in a directory.

# Output is in the DOT language.  The 'dot' application is part of

# graphviz <http://www.graphviz.org>

#

# Usage: graph.sh DIRECTORY [VIEWER]

#

# Serving suggestion:

# graph.sh world | dot -Tps -o /tmp/graph.ps && evince /tmp/graph.ps



if [ "$#" == "2" ]; then

    $0 $1 | dot -Tps -o /tmp/graph.ps && $2 /tmp/graph.ps

    exit 1

fi



if [ "$#" != "1" ]; then

    echo "Usage: graph.sh DIRECTORY [VIEWER]"

    exit 1

fi



cd $1



echo "digraph $(basename $PWD) {"



# Find and format the header dependencies

grep "#include.*\.h\"" *.cc *.h |\

sed 's!\(.*\)\.[cch]\+:#include "\(.*\)\.[cch]\+"!"\1" -> "\2";!' |\

grep -v "^\(.*\) -> \1" |\

grep -v "test_"



# Make sure independent headers are shown.

ls -1 *.h | sed 's/\.h$//'



echo "}"