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|
#!python
# -*- coding: utf-8 -*-
#######################################################################
# LAYMAN - A UTILITY TO SELECT AND UPDATE GENTOO OVERLAYS
#######################################################################
# Distributed under the terms of the GNU General Public License v2
#
# Copyright:
# (c) 2010 Brian Dolbec
# Distributed under the terms of the GNU General Public License v2
#
# Author(s):
# Brian Dolbec <dol-sen@sourceforge.net>
#
from __future__ import unicode_literals
from __future__ import print_function
import os
import sys
from layman.config import BareConfig
from layman.dbbase import UnknownOverlayException, UnknownOverlayMessage
from layman.db import DB
from layman.remotedb import RemoteDB
from layman.overlays.source import require_supported
#from layman.utils import path, delete_empty_directory
from layman.compatibility import encode
from layman.utils import get_ans, verify_overlay_src
from layman.mounter import Mounter
if sys.hexversion >= 0x30200f0:
STR = str
else:
STR = basestring
UNKNOWN_REPO_ID = "Repo ID '%s' " + \
"is not listed in the current available overlays list"
class LaymanAPI(object):
"""class to hold and run a layman instance for use by API consumer apps, guis, etc.
"""
def __init__(self, config=None, report_errors=False, output=None):
"""
@param configfile: optional config file to use instead of the default.
can be a BareConfig or ArgsParser config class.
default is BareConfig(output=output)
@param report_errors: optional bool to silence some error reporting to stdout
default is False
@param output: optional Message class instance created with your settings.
default is Message(module='layman') other params are defaults.
"""
self.config = config if config is not None else BareConfig(output=output)
self.output = self.config['output']
self.report_errors = report_errors
# add our error recording function to output
self.output.error_callback = self._error
# get installed and available dbs
self._installed_db = None
self._installed_ids = None
self._available_db = None
self._available_ids = None
self._error_messages = []
self.sync_results = []
self.config.set_option('mounts', Mounter(self._get_installed_db,
self.get_installed,
config=self.config))
def is_repo(self, ovl):
"""validates that the ovl given is a known repo id
@param ovl: repo id
@type ovl: str
@rtype boolean
"""
return ovl in self.get_available()
def is_installed(self, ovl):
"""checks that ovl is a known installed repo id
@param ovl: repo id
@type ovl: str
@rtype boolean
"""
return ovl in self.get_installed()
@staticmethod
def _check_repo_type( repos, caller):
"""internal function that validates the repos parameter,
converting a string to a list[string] if it is not already a list.
produces and error message if it is any other type
returns repos as list always"""
if isinstance(repos, STR):
repos = [repos]
# else assume it is an iterable, if not it will error
return [encode(i) for i in repos]
def delete_repos(self, repos):
"""delete the selected repo from the system
@type repos: list of strings or string
@param repos: ['repo-id1', ...] or 'repo-id'
@param output: method to handle output if desired
@rtype dict
"""
repos = self._check_repo_type(repos, "delete_repo")
results = []
for ovl in repos:
if not self.is_installed(ovl):
self.output.error("Repository '"+ovl+"' was not installed")
results.append(False)
continue
success = False
try:
success = self._get_installed_db().delete(
self._get_installed_db().select(ovl))
except Exception as e:
self._error('Exception caught removing repository "%(repo)s":\n'
'%(err)s' % {'repo': ovl, 'err': e})
results.append(success)
self.get_installed(dbreload=True)
if False in results:
return False
return True
def add_repos(self, repos, update_news=False):
"""installs the seleted repo id
@type repos: list of strings or string
@param repos: ['repo-id', ...] or 'repo-id'
@param update_news: bool, defaults to False
@rtype dict
"""
repos = self._check_repo_type(repos, "add_repo")
results = []
for ovl in repos:
if self.is_installed(ovl):
self.output.error("Repository '"+ovl+"' was already installed")
results.append(False)
continue
if not self.is_repo(ovl):
self.output.error(UnknownOverlayMessage(ovl))
results.append(False)
continue
success = False
try:
success = self._get_installed_db().add(
self._get_remote_db().select(ovl))
except Exception as e:
self._error('Exception caught installing repository "%(repo)s":'
'\n%(err)s' % {'repo': ovl, 'err': e})
results.append(success)
self.get_installed(dbreload=True)
if (True in results) and update_news:
self.update_news(repos)
if False in results:
return False
return True
def readd_repos(self, repos, update_news=False):
"""reinstalls any given amount of repos
by deleting them and readding them
@type repos: list of strings or string
@param repos: ['repo-id1', ...] or 'repo-id'
"""
success = self.delete_repos(repos)
if not success:
return success
success = self.add_repos(repos)
if update_news:
self.update_news(repos)
return success
def disable_repos(self, repos, update_news=False):
repos = self._check_repo_type(repos, "disable_repo")
results = []
for ovl in repos:
if not self.is_repo(ovl):
self.output.error(UnknownOverlayMessage(ovl))
result.append(False)
continue
success = False
try:
success = self._get_installed_db().disable(
self._get_installed_db().select(ovl))
except Exception as e:
self._error('Exception caught disabling repository "%(repo)s"'\
':\n%(err)s' % {'repo': ovl, 'err': e})
results.append(success)
self.get_installed(dbreload=True)
if (True in results) and update_news:
self.update_news(repos)
if False in results:
return False
return True
def enable_repos(self, repos, update_news=False):
repos = self._check_repo_type(repos, "enable_repo")
results = []
for ovl in repos:
if not self.is_repo(ovl):
self.output.error(UnknownOverlayMessage(ovl))
result.append(False)
continue
success = False
try:
success = self._get_installed_db().enable(
self._get_installed_db().select(ovl))
except Exception as e:
self._error('Exception caught enabling repository "%(repo)s"'\
':\n%(err)s' % {'repo': ovl, 'err': e})
results.append(success)
self.get_installed(dbreload=True)
if (True in results) and update_news:
self.update_news(repos)
if False in results:
return False
return True
def get_info_str(self, repos, local=True, verbose=False, width=0):
"""retrieves the string representation of the recorded information
about the repo(s) specified by ovl
@type repos: list of strings or string
@param repos: ['repo-id1', ...] or 'repo-id'
@rtype list of tuples [(str, bool, bool),...]
@return: dictionary {'repo-id': (info string, official, supported)}
"""
repos = self._check_repo_type(repos, "get_info")
result = {}
if local:
db = self._get_installed_db()
else:
db = self._get_remote_db()
for ovl in repos:
if not self.is_repo(ovl):
self.output.error(UnknownOverlayMessage(ovl))
result[ovl] = ('', False, False)
continue
try:
overlay = db.select(ovl)
#print "overlay = ", ovl
#print "!!!", overlay
except UnknownOverlayException as error:
#print "ERRORS", str(error)
self._error(error)
result[ovl] = ('', False, False)
else:
# Is the overlay supported?
if verbose:
info = overlay.get_infostr()
else:
info = overlay.short_list(width)
official = overlay.is_official()
supported = overlay.is_supported()
result[ovl] = (info, official, supported)
return result
def get_info_list(self, local=True, verbose=False, width=0):
"""retrieves the string representation of the recorded information
about the repo(s)
@param local: bool (defaults to True)
@param verbose: bool(defaults to False)
@param width: int (defaults to 0)
@rtype list of tuples [(str, bool, bool),...]
@return: list [(info string, official, supported),...]
"""
if local:
return self._get_installed_db().list(verbose=verbose, width=width)
else:
return self._get_remote_db().list(verbose=verbose, width=width)
def _verify_overlay_type(self, odb, ordb):
"""
Verifies the overlay type against the type reported by
remote database.
@param odb: local database of overlay information.
@param ordb: remote database of overlay information.
@rtype (boolean, msg)
"""
remote_type = ordb.sources[0].type
current_type = odb.sources[0].type
if remote_type not in current_type:
msg = 'The overlay type of overlay "%(repo_name)s" seems to have changed.\n'\
'The current overlay type is:\n'\
'\n'\
' %(current_type)s\n'\
'\n'\
'while the remote overlay is of type:\n'\
'\n'\
' %(remote_type)s\n'\
'\n'\
'the overlay will be readded using %(remote_type)s' %\
({
'repo_name': odb.name,
'current_type': current_type,
'remote_type': remote_type,
})
return True, msg
return False, ''
def _verify_overlay_source(self, odb, ordb):
"""
Verifies the overlay source url against the source url(s)
reported by the remote database.
@param odb: local database of overlay information.
@param ordb: remote database of overlay information.
@rtype (boolean, msg)
"""
current_src = odb.sources[0].src
(available_srcs, valid) = verify_overlay_src(current_src,
set(e.src for e in ordb.sources))
if ordb and odb and not valid:
if len(available_srcs) == 1:
plural = ''
candidates = ' %s' % tuple(available_srcs)[0]
else:
plural = 's'
candidates = '\n'.join((' %d. %s' % (ovl + 1, v)) \
for ovl, v in enumerate(available_srcs))
msg = 'The source of the overlay "%(repo_name)s" seems to have changed.\n'\
'You currently sync from\n'\
'\n'\
' %(current_src)s\n'\
'\n'\
'while the remote lists report\n'\
'\n'\
'%(candidates)s\n'\
'\n'\
'as correct location%(plural)s.\n'\
'\n'\
'Repo: "%(repo_name)s" was automatically updated...' %\
({
'repo_name':odb.name,
'current_src':current_src,
'candidates':candidates,
'plural':plural,
})
return True, msg, available_srcs
return False, '', available_srcs
def sync(self, repos, output_results=True, update_news=False):
"""syncs the specified repo(s) specified by repos
@type repos: list of strings or string
@param repos: ['repo-id1', ...] or 'repo-id'
@param output_results: bool, defaults to True
@param update_news: bool, defaults to False
@rtype bool or {'repo-id': bool,...}
"""
self.output.debug("API.sync(); repos to sync = %s" % ', '.join((x.decode() if isinstance(x, bytes) else x) for x in repos), 5)
fatals = []
warnings = []
success = []
repos = self._check_repo_type(repos, "sync")
db = self._get_installed_db()
self.output.debug("API.sync(); starting ovl loop", 5)
for ovl in repos:
update_url = False
self.output.debug("API.sync(); starting ovl = %s" %ovl, 5)
try:
#self.output.debug("API.sync(); selecting %s, db = %s" % (ovl, str(db)), 5)
odb = db.select(ovl)
self.output.debug("API.sync(); %s now selected" %ovl, 5)
except UnknownOverlayException as error:
#self.output.debug("API.sync(); UnknownOverlayException selecting %s" %ovl, 5)
#self._error(str(error))
fatals.append((ovl,
'Failed to select overlay "%(repo)s".\nError was: %(error)s'
% {'repo': ovl, 'err': error}))
self.output.debug("API.sync(); UnknownOverlayException "
"selecting %(repo)s. continuing to next ovl..."
% {'repo': ovl}, 5)
continue
try:
self.output.debug("API.sync(); try: self._get_remote_db().select(ovl)", 5)
ordb = self._get_remote_db().select(ovl)
except UnknownOverlayException:
message = 'Overlay "%(repo)s" could not be found in the remote '\
'lists.\nPlease check if it has been renamed and '\
're-add if necessary.' % {'repo': ovl}
warnings.append((ovl, message))
(diff_type, update_url) = (False, False)
else:
self.output.debug("API.sync(); else: self._get_remote_db().select(ovl)", 5)
(diff_type, type_msg) = self._verify_overlay_type(odb, ordb)
(update_url, url_msg, available_srcs) = self._verify_overlay_source(odb, ordb)
try:
if diff_type:
self.output.debug("API.sync(); starting API.readd_repos(ovl)", 5)
warnings.append((ovl, type_msg))
self.readd_repos(ovl)
success.append((ovl, 'Successfully readded overlay "' + ovl + '".'))
else:
if update_url:
self.output.debug("API.sync() starting db.update(ovl)", 5)
warnings.append((ovl, url_msg))
update_success = db.update(ordb, available_srcs)
if not update_success:
msg = 'Failed to update source URL for overlay'\
'"%(ovl)s". Re-add overlay? [y/n]'\
% {'ovl': ovl}
if get_ans(msg, color='yellow'):
self.readd_repos(ovl)
except Exception as error:
self.output.warn('Failed to perform overlay type or url updates', 2)
self.output.warn(' for Overlay: %s' % ovl, 2)
self.output.warn(' Error was: %s' % str(error))
continue
try:
self.output.debug("API.sync(); starting db.sync(ovl)", 5)
db.sync(ovl)
success.append((ovl,'Successfully synchronized overlay "' + ovl + '".'))
except Exception as error:
fatals.append((ovl,
'Failed to sync overlay "%(repo)s".\nError was: %(err)s'
% {'repo': ovl, 'err': error}))
if output_results:
if success:
message = '\nSucceeded:\n------\n'
for ovl, result in success:
message += result + '\n'
self.output.info(message, 3)
if warnings:
message = '\nWarnings:\n------\n'
for ovl, result in warnings:
message += result + '\n'
self.output.warn(message, 2)
if fatals:
message = '\nErrors:\n------\n'
for ovl, result in fatals:
message += result + '\n'
self.output.error(message)
self.sync_results = (success, warnings, fatals)
if update_news:
self.update_news(repos)
return fatals == []
def fetch_remote_list(self):
"""
Fetches the latest remote overlay list.
@rtype bool: reflects success/failure to fetch remote list.
"""
try:
dbreload, succeeded = self._get_remote_db().cache()
self.output.debug(
'LaymanAPI.fetch_remote_list(); cache updated = %s'
% str(dbreload),8)
except Exception as error:
self.output.error('Failed to fetch overlay list!\n Original Error'
' was:\n%(err)s' % {'err': error})
return False
self.get_available(dbreload)
return succeeded
def get_available(self, dbreload=False):
"""returns the list of available overlays"""
self.output.debug('LaymanAPI.get_available() dbreload = %s'
% str(dbreload), 8)
if self._available_ids is None or dbreload:
self._available_ids = self._get_remote_db(dbreload).list_ids()
return self._available_ids[:] or ['None']
def get_installed(self, dbreload=False):
"""returns the list of installed overlays"""
if self._installed_ids is None or dbreload:
self._installed_ids = self._get_installed_db(dbreload).list_ids()
return self._installed_ids[:]
def _get_installed_db(self, dbreload=False):
"""returns the list of installed overlays"""
if not self._installed_db or dbreload:
self._installed_db = DB(self.config)
self.output.debug("API._get_installed_db; len(installed) = %s, %s"
%(len(self._installed_db.list_ids()), self._installed_db.list_ids()), 5)
return self._installed_db
def _get_remote_db(self, dbreload=False):
"""returns the list of installed overlays"""
if self._available_db is None or dbreload:
self._available_db = RemoteDB(self.config)
return self._available_db
def reload(self):
"""reloads the installed and remote db's to the data on disk"""
self.get_available(dbreload=True)
self.get_installed(dbreload=True)
def _error(self, message):
"""outputs the error to the pre-determined output
defaults to stderr. This method may be removed, is here for now
due to code taken from the packagekit backend.
"""
self._error_messages.append(message)
self.output.debug("API._error(); _error_messages = %s" % str(self._error_messages), 4)
if self.report_errors:
print(message, file=self.config['stderr'])
def get_errors(self):
"""returns any warning or fatal messages that occurred during
an operation and resets it back to None
@rtype: list
@return: list of error strings
"""
self.output.debug("API.get_errors(); _error_messages = %s" % str(self._error_messages), 4)
if len(self._error_messages):
messages = self._error_messages[:]
self._error_messages = []
return messages
return []
def supported_types(self):
"""returns a dictionary of all repository types,
with boolean values"""
here = os.path.dirname(os.path.realpath(__file__))
modpath = os.path.join('overlays', 'modules')
modules = os.listdir(os.path.join(here, modpath))
cmds = [x for x in self.config.keys() if '_command' in x]
supported = {}
for cmd in cmds:
type_key = cmd.split('_')[0]
# The module dir might be named differently from the type_key.
# ex.) g-common and g-sorcery are named g_common and g_sorcery.
module = type_key.replace('-', '_')
# Don't bother executing require_supported() if the user didn't
# bring in support for the overlay type in the first place.
if module in modules:
supported[type_key] = require_supported(
[(self.config[cmd],type_key, '')], self.output.warn)
else:
supported[type_key] = False
return supported
def update_news(self, repos=None):
try:
if self.config['news_reporter'] == 'portage':
try:
from portage import db, root
from portage.news import count_unread_news, \
display_news_notifications
portdb = db[root]["porttree"].dbapi
vardb = db[root]["vartree"].dbapi
# get the actual repo_name from portage
# because it may be different than layman's name for it
repo_names = []
for repo in repos:
if isinstance(repo, bytes):
repo = repo.decode('UTF-8')
ovl = self._get_installed_db().select(repo)
ovl_path = os.path.join(ovl.config['storage'], repo)
name = portdb.getRepositoryName(ovl_path)
if name:
repo_names.append(name)
self.output.debug("LaymanAPI: update_news(); repo_names = "
+ str(repo_names), 4)
news_counts = count_unread_news(portdb, vardb, repo_names)
display_news_notifications(news_counts)
except ImportError:
# deprecated funtionality, remove when the above method
# is available in all portage versions
self.output.info("New portage news functionality not "
"available, using fallback method", 5)
from _emerge.actions import (display_news_notification,
load_emerge_config)
settings, trees, mtimedb = load_emerge_config()
display_news_notification(
trees[settings["ROOT"]]["root_config"], {})
elif self.config['news_reporter'] == 'custom':
if self.config['custom_news_func'] is None:
_temp = __import__(
'custom_news_pkg', globals(), locals(),
['layman_news_func'], -1)
self.config['custom_news_func'] = _temp.custom_news_func
self.config['custom_news_func'](repos)
elif self.config['news_reporter'] == 'pkgcore':
# pkgcore is not yet capable
return
except Exception as err:
msg = "update_news() failed running %s news reporter function\n" +\
"Error was; %s"
self._error(msg % (self.config['news_reporter'], err))
return
def create_fd():
"""creates file descriptor pairs an opens them ready for
use in place of stdin, stdout, stderr.
"""
fd_r, fd_w = os.pipe()
write = os.fdopen(fd_w, 'w')
read = os.fdopen(fd_r, 'r')
return (read, write, fd_r, fd_w)
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