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# -*- coding: UTF-8 -*-
# Copyright 2005 Gentoo Foundation
# Distributed under the terms of the GNU General Public license v2
# $Header: $
import re
from string import upper
import VM, Errors
from java_config.FileParser import *
from java_config.EnvironmentManager import *
import os, glob, re
import os.path
# Does not handle deps correctly
# Does however do the right thing for the only types of deps we should see
# Ignore blockers: portage doesn't support them in a way that is usefull for us
class VersionManager:
"""
Used to parse dependency stringsa, and find the best/prefered vm to use.
"""
#atom_parser = re.compile(r"([~!<>=]*)virtual/(jre|jdk)-([0-9\.]+)")
atom_parser = re.compile(r"([<>=]+)virtual/(jre|jdk)-([0-9\.*]+)")
pref_files = ['/etc/java-config/jdk.conf', '/usr/share/java-config/config/jdk-defaults.conf']
_prefs = None
def __init__(self):
pass
def get_prefs(self):
if self._prefs:
return self._prefs
else:
self._prefs = []
for file in self.pref_files:
if os.path.exists(file):
self._prefs += PrefsFileParser(file).get_config()
return self._prefs
def parse_depend(self, atoms):
"""Filter the dep string for usefull information"""
matched_atoms = []
matches = self.atom_parser.findall(atoms)
if len(matches) > 0:
for match in matches:
matched_atoms.append({'equality':match[0], 'type':match[1], 'version':match[2]})
matched_atoms.sort()
matched_atoms.reverse()
return matched_atoms
def matches(self, version_a, version_b, operator):
val = self.version_cmp(version_a, version_b)
if operator == '=': return val == 0
elif operator == '>=': return val >= 0
elif operator == '<=': return val <= 0
elif operator == '>': return val > 0
elif operator == '<': return val < 0
else: return False
def version_satisfies(self, atoms, vm):
version = vm.version()
matched_atoms = self.parse_depend(atoms)
for atom in matched_atoms:
if vm.is_type(atom['type']):
if self.matches(version, atom['version'], atom['equality']):
return True
return False
def get_lowest_atom(self, atoms):
lowest = None
for atom in atoms:
if not lowest:
lowest = atom
else:
if self.version_cmp(lowest['version'], atom['version']) > 0:
lowest = atom
if lowest:
return atom
else:
raise Exception("Couldnt find a vm dep")
def get_lowest(self, atoms):
atoms = self.parse_depend(atoms)
lowest = self.get_lowest_atom(atoms)
lowest = lowest['version']
if lowest:
return '.'.join(lowest.strip('*').split('.')[0:2])
else:
raise Exception("Couldnt find a vm dep")
def get_vm(self, atoms, need_virtual = None):
matched_atoms = self.parse_depend(atoms)
if len(matched_atoms) == 0:
return None
prefs = self.get_prefs()
low = self.get_lowest(atoms) # Lowest vm version we can use
for atom in matched_atoms:
for pref in prefs:
if pref[0] == low or pref[0] == "*": # We have a configured preference for this version
for vm in pref[1]: # Loop over the prefered once, and check if they are valid
gvm = self.find_vm(vm, atom)
if gvm:
if need_virtual: # Package we are finding a vm for needs a virtual
if gvm.provides(need_virtual): # we provide the virtual ourself good!
return gvm
else:
if EnvironmentManager().have_provider(need_virtual): # We have a package available that provides it, will use that
return gvm
else:
return gvm # use it!
low = self.get_lowest_atom(matched_atoms)
vm = self.find_vm("", low)
if vm:
return vm
else:
raise Exception("Couldnt find suitable VM, possible Invalid dep string")
def find_vm(self, vm, atom):
vm_list = EnvironmentManager().find_vm(vm)
vm_list.sort()
vm_list.reverse()
for vm in vm_list:
if vm.is_type(atom['type']):
if self.matches(vm.version(), atom['version'], atom['equality']):
return vm
return None
def version_cmp(self, version1, version2):
#Parly stolen from portage.py
if version1 == version2:
return 0
version1 = version1.split('.')
version2 = version2.split('.')
check_len = None
for x in range(1, len(version1)):
if version1[x][-1] == '*':
version1[x] = version1[x][:-1]
check_len = x
if version1[x][0] == '0':
version1[x]='.' + version1[x]
for x in range(1, len(version2)):
if version2[x][-1] == '*':
version2[x] = version2[x][:-1]
if (not check_len) or (check_len and check_len > x):
check_len = x
if version2[x][0] == '0':
version2[x]='.' + version2[x]
if len(version2) < len(version1):
version2.extend(["0"]*(len(version1)-len(version2)))
elif len(version1) < len(version2):
version1.extend(["0"]*(len(version2)-len(version1)))
for x in range(0, len(version1)):
if check_len and x > check_len:
return 0
ret = float(version1[x]) - float(version2[x])
if ret != 0:
return ret
return 0
#vator=VersionManager()
#for i in [
# ">=virtual/jdk-1.3",
# ">=virtual/jdk-1.4",
# ">=virtual/jdk-1.5",
# "|| ( =virtual/jdk-1.4* =virtual/jdk-1.3* )",
# "|| ( =virtual/jdk-1.3* =virtual/jdk-1.4* )",
# "=virtual/jdk-1.5*",
# "=virtual/jdk-1.4*",
# "=virtual/jdk-1.3*",
# ]:
# print i
# try:
# print vator.get_vm(i)
# except Exception, ex:
# print ex
# print
# vim:set expandtab tabstop=4 shiftwidth=4 softtabstop=4 nowrap:
|
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