108 lines
3.6 KiB
Python
108 lines
3.6 KiB
Python
import argparse, contextlib, multiprocessing, os, tempfile, shutil, subprocess
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@contextlib.contextmanager
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def mkdtemp():
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d = tempfile.mkdtemp()
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yield d
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shutil.rmtree(d, ignore_errors=True)
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def print_lines(lines):
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for line in lines:
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print(line)
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def write_to(file, lines):
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content = list((line + "\n" for line in lines))
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if (len(content) > 0):
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with open(file, 'w') as f:
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f.writelines(content)
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def make_executable(p):
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os.chmod(p, 509)
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def quote(s):
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text = s.replace("'", "'\"'\"'")
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return "'{}'".format(text)
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class ScriptBuilder:
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def __init__(self):
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self.commands = ['#!/bin/bash', '', 'rm -rf .tmp.output', '']
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def blank(self):
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self.commands.append('')
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def add_command(self, cmd, save=False):
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if save:
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self.commands.append(cmd + ' 2>&1 | tee .tmp.output')
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else:
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self.commands.append(cmd)
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def grep(self, text, file=None):
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self.add_command("grep -q -F {} {}".format(quote(text), file or '.tmp.output'))
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def check(self, equal_zero=False, result=1):
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op = 'eq' if equal_zero else 'ne'
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cmds = ['RES=$?',
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'if [ $RES -{} "0" ]; then'.format(op),
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' exit {}'.format(result),
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'fi']
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self.commands.extend(cmds)
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def write(self, p):
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write_to(p, self.commands)
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make_executable(p)
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def show(self):
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print_lines(self.commands)
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parser = argparse.ArgumentParser()
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parser.add_argument('--file', '-f', help='file to reduce', required=True)
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parser.add_argument('--text', '-t', action='append', help='expected output text')
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parser.add_argument('--keep', '-k', action='append', help='text to keep in source file')
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parser.add_argument('--check', '-c', action='append', help='command to check syntax')
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parser.add_argument('--dry-run', '-d', action='store_true', default=False, help='dry run')
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parser.add_argument('--timeout', action='store', default=300, help='Interestingness test timeout in seconds')
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parser.add_argument('--no-cache', action='store_true', default=False, help="Don't cache behavior of passes")
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parser.add_argument('--no-give-up', action='store_true', default=False, help="Don't give up on a pass that hasn't made progress for 50000 iterations")
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parser.add_argument('--sllooww', '--slow', action='store_true', default=False, help="Try harder to reduce, but perhaps take a long time to do so")
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parser.add_argument('command')
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parser.add_argument('args', nargs=argparse.REMAINDER)
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args = parser.parse_args()
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file = os.path.basename(args.file)
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sb = ScriptBuilder()
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for keep in args.keep or []:
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sb.grep(keep, file=file)
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sb.check()
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sb.blank()
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for check in args.check or []:
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sb.add_command(check+' '+file)
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sb.check()
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sb.blank()
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command = ' '.join([os.path.abspath(args.command)]+args.args+[file])
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sb.add_command(command, save=args.text)
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if args.text:
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for t in args.text:
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sb.grep(t)
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sb.check()
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else:
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sb.check(equal_zero=True)
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sb.show()
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with mkdtemp() as d:
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script = os.path.join(d, 'reduce.sh')
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sb.write(script)
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if args.dry_run:
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shutil.copy(args.file, d)
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subprocess.check_call([script], cwd=d)
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else:
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creduce = ['creduce', '--n', str(multiprocessing.cpu_count())]
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creduce.append("--timeout")
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creduce.append(str(args.timeout))
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if args.no_cache:
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creduce.append("--no-cache")
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if args.no_give_up:
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creduce.append("--no-give-up")
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if args.sllooww:
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creduce.append("--sllooww")
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subprocess.check_call(creduce + [script, args.file])
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