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42 lines
1.4 KiB
Python
42 lines
1.4 KiB
Python
""" This file generates a graph of the dependencies for the ninja build."""
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import sys
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import re
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def ninja_to_dot():
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def simplified_filename(path):
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component = path.split('/')[-1]
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return re.sub(
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r'[0-9]+-of', 'NN-of',
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re.sub(r'part[0-9]+', 'partNN', component)
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)
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print("digraph G {")
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print('rankdir="LR";')
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seen_edges = set()
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for line in sys.stdin:
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line = line.rstrip()
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if line.startswith('build'):
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# the output file is the first argument; strip off the colon that
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# comes from ninja syntax
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output_text, input_text = line.split(':')
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outfiles = [simplified_filename(part) for part in output_text.split(' ')[1:]]
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inputs = input_text.strip().split(' ')
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infiles = [simplified_filename(part) for part in inputs[1:]]
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operation = inputs[0]
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for infile in infiles:
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if infile == '|':
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# external dependencies start here; let's not graph those
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break
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for outfile in outfiles:
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edge = '"%s" -> "%s" [label="%s"]' % (infile, outfile, operation)
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if edge not in seen_edges:
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seen_edges.add(edge)
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print(edge)
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print("}")
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if __name__ == '__main__':
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ninja_to_dot()
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