path: root/portato/backend/package.py

# -*- coding: utf-8 -*-
#
# File: portato/backend/package.py
# This file is part of the Portato-Project, a graphical portage-frontend.
#
# Copyright (C) 2006-2008 René 'Necoro' Neumann
# This is free software.  You may redistribute copies of it under the terms of
# the GNU General Public License version 2.
# There is NO WARRANTY, to the extent permitted by law.
#
# Written by René 'Necoro' Neumann <necoro@necoro.net>

from __future__ import absolute_import

from ..helper import debug, paren_reduce
from ..dependency import DependencyTree

from . import _Package, system, flags

class Package (_Package):
	"""This is a class abstracting a normal package which can be installed."""

	def __init__ (self, cpv):
		"""Constructor.

		@param cpv: The cpv which describes the package to create.
		@type cpv: string (cat/pkg-ver)"""

		self._cpv = cpv
	
	#
	# implemented
	#
	
	def set_testing(self, enable = True):
		"""Sets the actual testing status of the package.
		
		@param enable: if True it is masked as stable; if False it is marked as testing
		@type enable: boolean"""
		
		flags.set_testing(self, enable)

	def remove_new_testing(self):
		"""Removes possible changed testing status."""
		
		flags.remove_new_testing(self.get_cpv())

	def set_masked (self, masking = False):
		"""Sets the masking status of the package.
	
		@param masking: if True: mask it; if False: unmask it
		@type masking: boolean"""
		
		flags.set_masked(self, masked = masking)

	def remove_new_masked (self):
		"""Removes possible changed masking status."""
		
		flags.remove_new_masked(self.get_cpv())

	def is_locally_masked (self):
		"""Checks whether the package is masked by the user.

		@returns: True if masked by the user; False if not
		@rtype: bool"""

		return flags.is_locally_masked(self)

	def get_new_use_flags (self):
		"""Returns a list of the new useflags, i.e. these flags which are not written to the portage-system yet.

		@returns: list of flags or []
		@rtype: string[]"""

		return flags.get_new_use_flags(self)

	def get_actual_use_flags (self):
		"""This returns all currently set use-flags including the new ones.

		@return: list of flags
		@rtype: string[]"""

		i_flags = self.get_global_settings("USE", installed = False).split()
		m_flags = system.get_global_settings("USE").split()
		for f in self.get_new_use_flags():
			removed = False

			if f[0] == "~":
				f = f[1:]
				removed = True

			invf = flags.invert_use_flag(f)	
			
			if f[0] == '-':
				if invf in i_flags and not (removed and invf in m_flags):
					i_flags.remove(invf)
				
			elif f not in i_flags:
				if not (removed and invf in m_flags):
					i_flags.append(f)

		return i_flags

	def set_use_flag (self, flag):
		"""Set a use-flag.

		@param flag: the flag to set
		@type flag: string"""
		
		flags.set_use_flag(self, flag)

	def remove_new_use_flags (self):
		"""Remove all the new use-flags."""
		
		flags.remove_new_use_flags(self)

	def use_expanded (self, flag, suggest = None):
		"""Tests whether a useflag is an expanded one. If it is, this method returns the USE_EXPAND-value.

		@param flag: the flag to check
		@type flag: string
		@param suggest: try this suggestion first
		@type suggest: string
		@returns: USE_EXPAND-value on success
		@rtype: string or None"""

		if suggest is not None:
			if flag.startswith(suggest.lower()):
				return suggest

		for exp in self.get_global_settings("USE_EXPAND").split():
			lexp = exp.lower()
			if flag.startswith(lexp):
				return exp

		return None

	def get_cpv(self):
		"""Returns full Category/Package-Version string.
		
		@returns: the cpv
		@rtype: string"""
		
		return self._cpv

	def get_cp (self):
		"""Returns the cp-string.
		
		@returns: category/package.
		@rtype: string"""
		
		return self.get_category()+"/"+self.get_name()

	def get_slot_cp (self):
		"""Returns the current cp followed by a colon and the slot-number.
		
		@returns: cp:slot
		@rtype: string"""

		return ("%s:%s" % (self.get_cp(), self.get_package_settings("SLOT")))

	def get_package_path(self):
		"""Returns the path to where the ChangeLog, Manifest, .ebuild files reside.
		
		@returns: path to the package files
		@rtype: string"""
		
		p = self.get_ebuild_path()
		sp = p.split("/")
		if sp:
			return "/".join(sp[:-1])

	def get_dependencies (self):
		"""
		Returns the tree of dependencies that this package needs.

		@rtype: L{DependencyTree}
		"""
		deps = " ".join(map(self.get_package_settings, ("RDEPEND", "PDEPEND", "DEPEND")))
		deps = paren_reduce(deps)
		
		tree = DependencyTree()

		def add (tree, deps):
			it = iter(deps)
			for dep in it:
				if hasattr(dep, "__iter__"):
					debug("Following dep is an unsupposed list: %s", dep)
					assert(len(dep) == 1)
					dep = dep[0]
				if dep.endswith("?"):
					ntree = tree.add_flag(dep[:-1])
					n = it.next()
					if not hasattr(n, "__iter__"):
						n = (n,)
					add(ntree, n)
				
				elif dep == "||":	
					n = it.next() # skip
					if not hasattr(n, "__iter__"):
						n = [n]
					else:
						n = list(n)

					tree.add_or(n)
				
				else:
					tree.add(dep)

		add(tree, deps)
		return tree

	#
	# Not implemented
	#

	def get_name(self):
		"""Returns base name of package, no category nor version.
		
		@returns: base-name
		@rtype: string"""
		
		raise NotImplementedError

	def get_version(self):
		"""Returns version of package, with (optional) revision number.
		
		@returns: version-rev
		@rtype: string"""
		
		raise NotImplementedError

	def get_category(self):
		"""Returns category of package.
		
		@returns: category
		@rtype: string"""
		
		raise NotImplementedError

	def is_installed(self):
		"""Returns true if this package is installed (merged).
		@rtype: boolean"""

		raise NotImplementedError

	def is_in_overlay(self):
		"""Returns true if the package is in an overlay.
		@rtype: boolean"""

		raise NotImplementedError

	def get_overlay_path(self):
		"""Returns the path to the current overlay.
		@rtype: string"""

		raise NotImplementedError
		
	def is_in_system (self):
		"""Returns False if the package could not be found in the portage system.

		@return: True if in portage system; else False
		@rtype: boolean"""

		raise NotImplementedError

	def is_missing_keyword(self):
		"""Returns True if the package is missing the needed keyword.
		
		@return: True if keyword is missing; else False
		@rtype: boolean"""

		raise NotImplementedError
		
	def is_testing(self, use_keywords = True):
		"""Checks whether a package is marked as testing.
		
		@param use_keywords: Controls whether possible keywords are taken into account or not.
		@type use_keywords: boolean
		@returns: True if the package is marked as testing; else False.
		@rtype: boolean"""

		raise NotImplementedError

	def is_masked (self, use_changed = True):
		"""Returns True if either masked by package.mask or by profile.
		
		@param use_changed: Controls, whether changes applied to masking keywords are taken into account.
		@type use_changed: boolean
		@returns: True if masked / False otherwise
		@rtype: boolean"""

		raise NotImplementedError

	def get_masking_reason (self):
		"""Returns the reason for masking the package. If this is not possible for the system, return None.

		@returns: the reason for masking the package
		@rtype: string"""
		
	def get_iuse_flags (self, installed = False, removeForced = True):
		"""Returns a list of _all_ useflags for this package, i.e. all useflags you can set for this package.
		
		@param installed: do not take the ones stated in the ebuild, but the ones it has been installed with
		@type installed: boolean
		@param removeForced: remove forced flags (i.e. usemask / useforce) from the iuse flags as they cannot be set from the user
		@type removeForced: boolean

		@returns: list of use-flags
		@rtype: string[]"""

		raise NotImplementedError

	def get_matched_dep_packages (self, depvar):
		"""This function looks for all dependencies which are resolved. In normal case it makes only sense for installed packages, but should work for uninstalled ones too.

		@param depvar: the dependency variables (RDEPEND, PDEPEND, DEPEND) to use
		@type depvar: string[]
		
		@returns: unique list of dependencies resolved (with elements like "<=net-im/foobar-1.2.3")
		@rtype: string[]

		@raises portato.DependencyCalcError: when an error occured during executing portage.dep_check()"""

		raise NotImplementedError
		
	def get_dep_packages (self, depvar = ["RDEPEND", "PDEPEND", "DEPEND"], with_criterions = False):
		"""Returns a cpv-list of packages on which this package depends and which have not been installed yet. This does not check the dependencies in a recursive manner.

		@param depvar: the dependency variables (RDEPEND, PDEPEND, DEPEND) to use
		@type depvar: string[]
		@param with_criterions: return also the criterions
		@type with_criterions: boolean
		
		@returns: list of cpvs on which the package depend (and if wanted also the criterions)
		@rtype: string[] or (string, string)[]

		@raises portato.BlockedException: when a package in the dependency-list is blocked by an installed one
		@raises portato.PackageNotFoundException: when a package in the dependency list could not be found in the system
		@raises portato.DependencyCalcError: when an error occured during executing portage.dep_check()"""

		raise NotImplementedError

	def get_global_settings(self, key, installed = True):
		"""Returns the value of a global setting, i.e. ARCH, USE, ROOT, DISTDIR etc.
		
		@param key: the setting to return
		@type key: string
		@param installed: get the installed settings or the ebuild settings
		@type installed: boolean
		@returns: the value of this setting
		@rtype: string"""

		raise NotImplementedError

	def get_ebuild_path(self):
		"""Returns the complete path to the .ebuild file.
		
		@rtype: string"""

		raise NotImplementedError

	def get_files (self):
		"""
		Returns an iterator over the installed files of a package.
		If the package is not installed, the iterator should be "empty".

		@returns: the installed files
		@rtype: string<iterator>
		"""

		raise NotImplementedError

	def get_package_settings(self, var, installed = True):
		"""Returns a package specific setting, such as DESCRIPTION, SRC_URI, IUSE ...
		
		@param var: the setting to get
		@type var: string
		@param installed: take the vartree or the porttree
		@type installed: boolean
		
		@returns: the value of the setting
		@rtype: string"""

		raise NotImplementedError

	def get_installed_use_flags(self):
		"""Returns _all_ (not only the package-specific) useflags which were set at the installation time of the package.
		
		@returns: list of use flags
		@rtype: string[]"""
		
		raise NotImplementedError

	def compare_version(self, other):
		"""Compares this package's version to another's CPV; returns -1, 0, 1.
		
		@param other: the other package
		@type other: Package
		@returns: -1, 0 or 1
		@rtype: int"""

		raise NotImplementedError

	def matches (self, criterion):
		"""This checks, whether this package matches a specific versioning criterion - e.g.: "<=net-im/foobar-1.2".
		
		@param criterion: the criterion to match against
		@type criterion: string
		@returns: True if matches; False if not
		@rtype: boolean"""

		raise NotImplementedError