help.py

来自「LINUX下强大的文件管理器。遵循 GNU 协议。」· Python 代码 · 共 48 行

from zeroinstall.injector import autopolicy, model, reader
import rox, os
from rox import filer

def get_impl_path(policy, impl):
	if impl.id.startswith('.') or impl.id.startswith('/'):
		return impl.id
	elif impl.id.startswith('package:'):
		return None
	else:
		impl_path = policy.get_implementation_path(impl)
		assert impl_path
		return impl_path

def show_help(uri):
	p = autopolicy.AutoPolicy(uri, download_only = True)
	p.freshness = 0		# Don't check for updates

	if p.need_download():
		os.spawnlp(os.P_WAIT, '0launch', '0launch', '-d', uri)
		reader.update_from_cache(p.get_interface(p.root))

	p.recalculate()
	iface = p.get_interface(uri)
	impl = p.get_implementation(iface)
	path = get_impl_path(p, impl)

	# Get the help directory from the feed meta-data if possible
	help = None
	if hasattr(impl, 'metadata'):
		docdir = impl.metadata.get('doc-dir', None)
		if docdir:
			help = os.path.join(path, docdir)

	# Nothing in the feed. See if there's a Help directory next to the executable
	if help is None:
		if hasattr(impl, 'main'):
			main = impl.main
		else:
			main = iface.main
		assert main
		help = os.path.join(path, os.path.dirname(main), 'Help')

	if not os.path.isdir(help):
		rox.alert('Sorry, this program has no documentation\n\n(%s directory missing)' % help)
	else:
		filer.open_dir(help)