mirror of https://github.com/tLDP/python-tldp
108 lines
3.3 KiB
Python
108 lines
3.3 KiB
Python
#! /usr/bin/python
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# -*- coding: utf8 -*-
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from __future__ import absolute_import, division, print_function
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import os
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from ..utils import logger
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class SignatureChecker(object):
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@classmethod
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def signatureLocation(cls, f):
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f.seek(0)
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buf = f.read(1024).lower()
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for sig in cls.signatures:
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try:
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sindex = buf.index(sig.lower())
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logger.debug("Found signature %s in %s at %s; doctype %s.",
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sig, f.name, sindex, cls)
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return sindex
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except ValueError:
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logger.debug("Signature %s not found in %s for type %s",
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sig, f.name, cls.__name__)
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return None
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class BaseDoctype(object):
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def __init__(self, *args, **kwargs):
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self.source = kwargs.get('source', None)
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self.output = kwargs.get('output', None)
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self.config = kwargs.get('config', None)
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assert None not in (self.source, self.output, self.config)
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def build_precheck(self):
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try:
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self.required.items()
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except AttributeError:
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return False
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for tool, validator in self.required.items():
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thing = getattr(self.config, tool, None)
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assert thing is not None
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assert validator(thing)
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return True
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def generate(self):
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# -- the output directory gets to prepare; must return True
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#
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if not self.output.hook_prebuild():
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return False
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opwd = os.getcwd()
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os.chdir(self.output.dirname)
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# -- the processor gets to prepare; must return True
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#
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if not self.build_precheck():
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logger.warning("%s build_precheck failed (%s), skipping to next build",
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self.source.stem, self.source.doctype.formatname)
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return False
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# -- now, we can walk through build targets, and record a vector
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# of success or failure
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#
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vector = list()
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def last_command():
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return vector[-1]
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for target in self.buildorder:
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premethod = getattr(self, 'pre_' + target, None)
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mainmethod = getattr(self, target, None)
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postmethod = getattr(self, 'post_' + target, None)
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assert mainmethod is not None
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if premethod:
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vector.append(premethod())
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if not last_command():
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logger.warning("%s pre_%s failed, skipping to next target",
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self.source.stem, target)
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continue
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vector.append(mainmethod())
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if not last_command():
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logger.warning("%s %s failed, skipping to next target",
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self.source.stem, target)
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continue
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if postmethod:
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vector.append(postmethod())
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if not last_command():
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logger.warning("%s post_%s failed, skipping to next target",
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self.source.stem, target)
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continue
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result = all(vector)
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if result:
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self.output.hook_build_success()
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else:
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self.output.hook_build_failure()
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os.chdir(opwd)
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return result
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#
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# -- end of file
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