1#!/usr/bin/env python 2 3# This script extracts the VPlan digraphs from the vectoriser debug messages 4# and saves them in individual dot files (one for each plan). Optionally, and 5# providing 'dot' is installed, it can also render the dot into a PNG file. 6 7from __future__ import print_function 8 9import sys 10import re 11import argparse 12import shutil 13import subprocess 14 15parser = argparse.ArgumentParser() 16parser.add_argument('--png', action='store_true') 17args = parser.parse_args() 18 19dot = shutil.which('dot') 20if args.png and not dot: 21 raise RuntimeError("Can't export to PNG without 'dot' in the system") 22 23pattern = re.compile(r"(digraph VPlan {.*?\n})",re.DOTALL) 24matches = re.findall(pattern, sys.stdin.read()) 25 26for vplan in matches: 27 m = re.search("graph \[.+(VF=.+,UF.+)", vplan) 28 if not m: 29 raise ValueError("Can't get the right VPlan name") 30 name = re.sub('[^a-zA-Z0-9]', '', m.group(1)) 31 32 if args.png: 33 filename = 'VPlan' + name + '.png' 34 print("Exporting " + name + " to PNG via dot: " + filename) 35 p = subprocess.Popen([dot, '-Tpng', '-o', filename], 36 encoding='utf-8', 37 stdin=subprocess.PIPE, 38 stdout=subprocess.PIPE, 39 stderr=subprocess.PIPE) 40 out, err = p.communicate(input=vplan) 41 if err: 42 raise RuntimeError("Error running dot: " + err) 43 44 else: 45 filename = 'VPlan' + name + '.dot' 46 print("Exporting " + name + " to DOT: " + filename) 47 with open(filename, 'w') as out: 48 out.write(vplan) 49