361 lines
10 KiB
Python
361 lines
10 KiB
Python
#!/usr/bin/env python
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import collections
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import contextlib
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import hashlib
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import logging
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import optparse
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import os
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import re
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import shutil
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import subprocess
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import tempfile
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import sys
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import time
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import urllib2
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logger = logging.getLogger(__name__)
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if hasattr(subprocess, 'check_output'):
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check_output = subprocess.check_output
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else:
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# Copied with minor modifications from the Python source code
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# http://hg.python.org/cpython/file/9cb1366b251b/Lib/subprocess.py#l549
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def check_output(*popenargs, **kwargs):
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if 'stdout' in kwargs:
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raise ValueError(
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'stdout argument not allowed, it will be overridden.')
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process = subprocess.Popen(stdout=subprocess.PIPE,
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*popenargs, **kwargs)
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output, unused_err = process.communicate()
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retcode = process.poll()
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if retcode:
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cmd = kwargs.get("args")
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if cmd is None:
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cmd = popenargs[0]
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raise subprocess.CalledProcessError(retcode, cmd, output=output)
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return output
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class PakeError(RuntimeError):
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pass
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class AmbiguousRuleError(PakeError):
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def __init__(self, name):
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self.name = name
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def __str__(self):
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return '%r matches multiple rules' % (self.name,)
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class BuildError(PakeError):
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def __init__(self, target, message):
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self.target = target
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self.message = message
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def __str__(self):
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return '%s: %s' % (self.target.name, self.message)
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class DuplicateTargetError(PakeError):
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def __init__(self, target):
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self.target = target
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def __str__(self):
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return 'duplicate target %r' % (self.target.name,)
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class Target(object):
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def __init__(self, name, action=None, clean=True, dependencies=(),
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makedirs=True, phony=False, precious=False):
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self.name = name
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self.action = action
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self._clean = clean
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self.dependencies = list(flatten(dependencies))
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self._makedirs = makedirs
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self.phony = phony
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self.precious = precious
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self.logger = logging.getLogger(self.name)
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self.timestamp = None
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def build(self, dry_run=False):
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timestamp = 0
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for dependency in self.dependencies:
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target = targets.get(dependency)
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timestamp = max(timestamp, target.build(dry_run=dry_run))
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self.debug('build')
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if self.timestamp is None:
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if not self.phony and os.path.exists(self.name):
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self.timestamp = os.stat(self.name).st_mtime
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else:
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self.timestamp = -1
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if self.timestamp < timestamp:
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self.debug('action')
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if self._makedirs and not dry_run:
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self.makedirs(os.path.dirname(self.name))
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if self.action:
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if self.action.__doc__:
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self.info(self.action.__doc__)
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if not dry_run:
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self.action(self)
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self.timestamp = timestamp or time.time()
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return self.timestamp
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@contextlib.contextmanager
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def chdir(self, dir):
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cwd = os.getcwd()
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dir = dir % vars(variables)
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self.info('cd %s', dir)
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os.chdir(dir)
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try:
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yield dir
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finally:
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self.info('cd %s', cwd)
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os.chdir(cwd)
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def cp(self, *args):
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args = flatten_expand_list(args)
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dest = args.pop()
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for arg in args:
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self.info('cp %s %s', arg, dest)
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shutil.copy(arg, dest)
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def cp_r(self, *args):
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args = flatten_expand_list(args)
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dest = args.pop()
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for arg in args:
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self.info('cp -r %s %s', arg, dest)
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shutil.copytree(arg, dest)
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def clean(self, really=False, recurse=True):
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if (self._clean or really) and not self.precious:
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self.info('clean')
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try:
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os.remove(self.name)
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except OSError:
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pass
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if recurse:
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for dependency in self.dependencies:
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targets.get(dependency).clean(really=really, recurse=recurse)
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def debug(self, *args, **kwargs):
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self.logger.debug(*args, **kwargs)
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def download(self, url, md5=None):
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content = urllib2.urlopen(url).read()
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if md5 and hashlib.md5(content).hexdigest() != md5:
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raise BuildError(self, 'corrupt download')
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# FIXME Python on Windoze corrupts the content when writing it
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# FIXME probably something to do with encodings
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with open(self.name, 'w') as f:
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f.write(content)
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def error(self, message):
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raise BuildError(self, message)
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def graph(self, f, visited):
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if self in visited:
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return
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visited.add(self)
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for dependency in self.dependencies:
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target = targets.get(dependency)
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f.write('\t"%s" -> "%s";\n' % (self.name, target.name))
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target.graph(f, visited)
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def info(self, *args, **kwargs):
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self.logger.info(*args, **kwargs)
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def makedirs(self, path):
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path = path % vars(variables)
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if path and not os.path.exists(path):
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self.info('mkdir -p %s', path)
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os.makedirs(path)
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def output(self, *args, **kwargs):
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args = flatten_expand_list(args)
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self.info(' '.join(args))
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try:
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output = check_output(args, **kwargs)
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with open(self.name, 'w') as f:
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f.write(output)
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except subprocess.CalledProcessError as e:
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self.clean(recurse=False)
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self.error(e)
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def rm_rf(self, *args):
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args = flatten_expand_list(args)
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for arg in args:
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self.info('rm -rf %s', arg)
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shutil.rmtree(arg, ignore_errors=True)
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def run(self, *args, **kwargs):
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args = flatten_expand_list(args)
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self.info(' '.join(args))
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try:
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subprocess.check_call(args, **kwargs)
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except subprocess.CalledProcessError as e:
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self.clean(recurse=False)
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self.error(e)
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@contextlib.contextmanager
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def tempdir(self):
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tempdir = tempfile.mkdtemp()
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self.info('mkdir -p %s', tempdir)
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try:
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yield tempdir
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finally:
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self.info('rm -rf %s', tempdir)
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shutil.rmtree(tempdir, ignore_errors=True)
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def touch(self):
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if os.path.exists(self.name):
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os.utime(self.name, None)
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else:
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with open(self.name, 'w'):
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pass
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class TargetCollection(object):
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def __init__(self):
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self.default = None
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self.targets = {}
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def add(self, target):
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if target.name in self.targets:
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raise DuplicateTargetError(target)
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self.targets[target.name] = target
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if self.default is None:
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self.default = target
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def get(self, name):
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if name in self.targets:
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return self.targets[name]
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target = None
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for regexp, f in rules.iteritems():
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match = regexp.search(name)
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if not match:
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continue
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if target is not None:
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raise AmbiguousRuleError(name)
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target = f(name, match)
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if target is None:
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target = Target(name, precious=True)
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self.targets[name] = target
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return target
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class VariableCollection(object):
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def __init__(self, **kwargs):
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for key, value in kwargs.iteritems():
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setattr(self, key, value)
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def __setattr__(self, key, value):
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if not hasattr(self, key):
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object.__setattr__(self, key, value)
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targets = TargetCollection()
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rules = {}
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variables = VariableCollection(**os.environ)
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def flatten(*args):
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for arg in args:
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if (isinstance(arg, collections.Iterable) and
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not isinstance(arg, basestring)):
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for element in flatten(*arg):
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yield element
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else:
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yield arg
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def flatten_expand_list(*args):
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return list(arg % vars(variables) for arg in flatten(args))
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def ifind(*paths):
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for path in paths:
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for dirpath, dirnames, names in os.walk(path):
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for name in names:
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yield os.path.join(dirpath, name)
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def main(argv=sys.argv):
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option_parser = optparse.OptionParser()
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option_parser.add_option('-c', '--clean',
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action='store_true')
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option_parser.add_option('-g', '--graph',
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action='store_true')
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option_parser.add_option('-n', '--dry-run', '--just-print', '--recon',
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action='store_true')
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option_parser.add_option('-r', '--really',
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action='store_true')
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option_parser.add_option('-v', '--verbose',
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action='count', dest='logging_level')
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option_parser.set_defaults(logging_level=0)
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options, args = option_parser.parse_args(argv[1:])
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logging.basicConfig(format='%(asctime)s %(name)s: %(message)s',
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level=logging.INFO - 10 * options.logging_level)
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targets_ = []
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for arg in args:
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match = re.match(r'(?P<key>\w+)=(?P<value>.*)\Z', arg)
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if match:
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key, value = match.group('key', 'value')
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if not hasattr(variables, key):
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logger.error('%s is not a variable', key)
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logger.debug('%s=%r', key, value)
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object.__setattr__(variables, key, value)
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continue
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targets_.append(arg)
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if not targets_:
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targets_ = (targets.default.name,)
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try:
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for target in targets_:
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target = targets.get(target)
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if options.clean:
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target.clean(really=options.really, recurse=True)
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elif options.graph:
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sys.stdout.write('digraph "%s" {\n' % (target.name,))
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target.graph(sys.stdout, set())
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sys.stdout.write('}\n')
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else:
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target.build(dry_run=options.dry_run)
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except BuildError as e:
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logger.error(e)
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sys.exit(1)
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def output(*args):
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args = flatten_expand_list(args)
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logger.debug(' '.join(args))
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return check_output(args)
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def rule(pattern):
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def f(targetmaker):
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rules[re.compile(pattern)] = targetmaker
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return f
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def target(name, *dependencies, **kwargs):
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def f(action):
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target = Target(name, action=action, dependencies=dependencies,
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**kwargs)
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targets.add(target)
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return f
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def virtual(name, *dependencies, **kwargs):
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target = Target(name, dependencies=dependencies, clean=False, phony=True,
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**kwargs)
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targets.add(target)
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