import os import sys import pkgutil from euscan import CONFIG, output from gentoolkit.metadata import MetaData handlers = {'package': [], 'url': [], 'all': {}} # autoimport all modules in this directory and append them to handlers list for loader, module_name, is_pkg in pkgutil.walk_packages(__path__): module = loader.find_module(module_name).load_module(module_name) if not hasattr(module, 'HANDLER_NAME'): continue if hasattr(module, 'scan_url'): handlers['url'].append(module) if hasattr(module, 'scan_pkg'): handlers['package'].append(module) handlers['all'][module.HANDLER_NAME] = module # sort handlers by priority def sort_handlers(handlers): return sorted( handlers, key=lambda handler: handler.PRIORITY, reverse=True ) handlers['package'] = sort_handlers(handlers['package']) handlers['url'] = sort_handlers(handlers['url']) def find_best_handler(kind, pkg, *args): """ Find the best handler for the given package """ for handler in handlers[kind]: if handler.can_handle(pkg, *args): return handler return None def find_handlers(kind, names): ret = [] for name in names: # Does this handler exist, and handle this kind of thing ? (pkg / url) if name in handlers['all'] and handlers['all'][name] in handlers[kind]: ret.append(handlers['all'][name]) return ret def get_metadata(pkg): metadata = {} pkg_metadata = None meta_override = os.path.join('metadata', pkg.category, pkg.name, 'metadata.xml') try: if os.path.exists(meta_override): pkg_metadata = MetaData(meta_override) output.einfo('Using custom metadata: %s' % meta_override) if not pkg_metadata: pkg_metadata = pkg.metadata except Exception, e: output.ewarn('Error when fetching metadata: %s' % str(e)) if not pkg_metadata: return {} # Support multiple remote-id and multiple watch for upstream in pkg_metadata._xml_tree.findall("upstream"): for node in upstream.findall("watch"): options = dict(node.attrib) options['data'] = node.text if "type" in options: handler = options['type'] else: handler = "url" options['type'] = "url" for key in ["versionmangle", "downloadurlmangle"]: value = options.get(key, None) if value: options[key] = value.split(";") if handler not in metadata: metadata[handler] = [] metadata[handler].append(options) for upstream in pkg_metadata._xml_tree.findall("upstream"): for node in upstream.findall("remote-id"): handler = node.attrib.get("type") if not handler: continue if handler in metadata: for i in range(len(metadata[handler])): if not metadata[handler][i]['data']: metadata[handler][i]['data'] = node.text else: metadata[handler] = [{'type': handler, 'data': node.text}] return metadata def scan_pkg(pkg_handler, pkg, options, on_progress=None): versions = [] if on_progress: on_progress(increment=35) for o in options: versions += pkg_handler.scan_pkg(pkg, o) if on_progress: on_progress(increment=35) return versions def scan_url(pkg, urls, options, on_progress=None): versions = [] if on_progress: progress_available = 70 num_urls = sum([len(urls[fn]) for fn in urls]) if num_urls > 0: progress_increment = progress_available / num_urls else: progress_increment = 0 for filename in urls: for url in urls[filename]: if on_progress and progress_available > 0: on_progress(increment=progress_increment) progress_available -= progress_increment output.einfo("SRC_URI is '%s'" % url) if '://' not in url: output.einfo("Invalid url '%s'" % url) continue try: url_handler = find_best_handler('url', pkg, url) for o in options: versions += url_handler.scan_url(pkg, url, o) except Exception as e: output.ewarn( "Handler failed: [%s] %s" % (e.__class__.__name__, e.message) ) if versions and CONFIG['oneshot']: break if on_progress and progress_available > 0: on_progress(increment=progress_available) return versions def scan(pkg, urls, on_progress=None): """ Scans upstream for the given package. First tries if a package wide handler is available, then fallbacks in url handling. """ if not CONFIG['quiet'] and not CONFIG['format']: sys.stdout.write('\n') metadata = get_metadata(pkg) versions = [] pkg_handlers = find_handlers('package', metadata.keys()) if not pkg_handlers: pkg_handler = find_best_handler('package', pkg) if pkg_handler: pkg_handlers = [pkg_handler] for pkg_handler in pkg_handlers: options = metadata.get(pkg_handler.HANDLER_NAME, [{}]) versions += scan_pkg(pkg_handler, pkg, options, on_progress) if not pkg_handlers: versions += scan_url(pkg, urls, [{}], on_progress) return versions def mangle(kind, name, string): if name not in handlers['all']: return None handler = handlers['all'][name] if not hasattr(handler, 'mangle_%s' % kind): return None return getattr(handler, 'mangle_%s' % kind)(string) def mangle_url(name, string): return mangle('url', name, string) def mangle_version(name, string): return mangle('version', name, string)