49 lines
1.6 KiB
Python
49 lines
1.6 KiB
Python
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#!/usr/bin/env python
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# This script extracts the VPlan digraphs from the vectoriser debug messages
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# and saves them in individual dot files (one for each plan). Optionally, and
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# providing 'dot' is installed, it can also render the dot into a PNG file.
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from __future__ import print_function
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import sys
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import re
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import argparse
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import shutil
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import subprocess
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parser = argparse.ArgumentParser()
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parser.add_argument('--png', action='store_true')
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args = parser.parse_args()
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dot = shutil.which('dot')
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if args.png and not dot:
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raise RuntimeError("Can't export to PNG without 'dot' in the system")
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pattern = re.compile(r"(digraph VPlan {.*?\n})",re.DOTALL)
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matches = re.findall(pattern, sys.stdin.read())
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for vplan in matches:
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m = re.search("graph \[.+(VF=.+,UF.+)", vplan)
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if not m:
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raise ValueError("Can't get the right VPlan name")
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name = re.sub('[^a-zA-Z0-9]', '', m.group(1))
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if args.png:
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filename = 'VPlan' + name + '.png'
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print("Exporting " + name + " to PNG via dot: " + filename)
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p = subprocess.Popen([dot, '-Tpng', '-o', filename],
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encoding='utf-8',
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stdin=subprocess.PIPE,
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stdout=subprocess.PIPE,
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stderr=subprocess.PIPE)
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out, err = p.communicate(input=vplan)
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if err:
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raise RuntimeError("Error running dot: " + err)
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else:
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filename = 'VPlan' + name + '.dot'
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print("Exporting " + name + " to DOT: " + filename)
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with open(filename, 'w') as out:
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out.write(vplan)
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