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-rw-r--r--libbe/upgrade.py187
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diff --git a/libbe/upgrade.py b/libbe/upgrade.py
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-# Copyright (C) 2009 W. Trevor King <wking@drexel.edu>
-#
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License along
-# with this program; if not, write to the Free Software Foundation, Inc.,
-# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
-
-"""
-Handle conversion between the various on-disk images.
-"""
-
-import os, os.path
-import sys
-import doctest
-
-import encoding
-import mapfile
-import vcs
-
-# a list of all past versions
-BUGDIR_DISK_VERSIONS = ["Bugs Everywhere Tree 1 0",
- "Bugs Everywhere Directory v1.1",
- "Bugs Everywhere Directory v1.2"]
-
-# the current version
-BUGDIR_DISK_VERSION = BUGDIR_DISK_VERSIONS[-1]
-
-class Upgrader (object):
- "Class for converting "
- initial_version = None
- final_version = None
- def __init__(self, root):
- self.root = root
- # use the "None" VCS to ensure proper encoding/decoding and
- # simplify path construction.
- self.vcs = vcs.vcs_by_name("None")
- self.vcs.root(self.root)
- self.vcs.encoding = encoding.get_encoding()
-
- def get_path(self, *args):
- """
- Return a path relative to .root.
- """
- dir = os.path.join(self.root, ".be")
- if len(args) == 0:
- return dir
- assert args[0] in ["version", "settings", "bugs"], str(args)
- return os.path.join(dir, *args)
-
- def check_initial_version(self):
- path = self.get_path("version")
- version = self.vcs.get_file_contents(path).rstrip("\n")
- assert version == self.initial_version, version
-
- def set_version(self):
- path = self.get_path("version")
- self.vcs.set_file_contents(path, self.final_version+"\n")
-
- def upgrade(self):
- print >> sys.stderr, "upgrading bugdir from '%s' to '%s'" \
- % (self.initial_version, self.final_version)
- self.check_initial_version()
- self.set_version()
- self._upgrade()
-
- def _upgrade(self):
- raise NotImplementedError
-
-
-class Upgrade_1_0_to_1_1 (Upgrader):
- initial_version = "Bugs Everywhere Tree 1 0"
- final_version = "Bugs Everywhere Directory v1.1"
- def _upgrade_mapfile(self, path):
- contents = self.vcs.get_file_contents(path)
- old_format = False
- for line in contents.splitlines():
- if len(line.split("=")) == 2:
- old_format = True
- break
- if old_format == True:
- # translate to YAML.
- newlines = []
- for line in contents.splitlines():
- line = line.rstrip('\n')
- if len(line) == 0:
- continue
- fields = line.split("=")
- if len(fields) == 2:
- key,value = fields
- newlines.append('%s: "%s"' % (key, value.replace('"','\\"')))
- else:
- newlines.append(line)
- contents = '\n'.join(newlines)
- # load the YAML and save
- map = mapfile.parse(contents)
- mapfile.map_save(self.vcs, path, map)
-
- def _upgrade(self):
- """
- Comment value field "From" -> "Author".
- Homegrown mapfile -> YAML.
- """
- path = self.get_path("settings")
- self._upgrade_mapfile(path)
- for bug_uuid in os.listdir(self.get_path("bugs")):
- path = self.get_path("bugs", bug_uuid, "values")
- self._upgrade_mapfile(path)
- c_path = ["bugs", bug_uuid, "comments"]
- if not os.path.exists(self.get_path(*c_path)):
- continue # no comments for this bug
- for comment_uuid in os.listdir(self.get_path(*c_path)):
- path_list = c_path + [comment_uuid, "values"]
- path = self.get_path(*path_list)
- self._upgrade_mapfile(path)
- settings = mapfile.map_load(self.vcs, path)
- if "From" in settings:
- settings["Author"] = settings.pop("From")
- mapfile.map_save(self.vcs, path, settings)
-
-
-class Upgrade_1_1_to_1_2 (Upgrader):
- initial_version = "Bugs Everywhere Directory v1.1"
- final_version = "Bugs Everywhere Directory v1.2"
- def _upgrade(self):
- """
- BugDir settings field "rcs_name" -> "vcs_name".
- """
- path = self.get_path("settings")
- settings = mapfile.map_load(self.vcs, path)
- if "rcs_name" in settings:
- settings["vcs_name"] = settings.pop("rcs_name")
- mapfile.map_save(self.vcs, path, settings)
-
-
-upgraders = [Upgrade_1_0_to_1_1,
- Upgrade_1_1_to_1_2]
-upgrade_classes = {}
-for upgrader in upgraders:
- upgrade_classes[(upgrader.initial_version,upgrader.final_version)]=upgrader
-
-def upgrade(path, current_version,
- target_version=BUGDIR_DISK_VERSION):
- """
- Call the appropriate upgrade function to convert current_version
- to target_version. If a direct conversion function does not exist,
- use consecutive conversion functions.
- """
- if current_version not in BUGDIR_DISK_VERSIONS:
- raise NotImplementedError, \
- "Cannot handle version '%s' yet." % version
- if target_version not in BUGDIR_DISK_VERSIONS:
- raise NotImplementedError, \
- "Cannot handle version '%s' yet." % version
-
- if (current_version, target_version) in upgrade_classes:
- # direct conversion
- upgrade_class = upgrade_classes[(current_version, target_version)]
- u = upgrade_class(path)
- u.upgrade()
- else:
- # consecutive single-step conversion
- i = BUGDIR_DISK_VERSIONS.index(current_version)
- while True:
- version_a = BUGDIR_DISK_VERSIONS[i]
- version_b = BUGDIR_DISK_VERSIONS[i+1]
- try:
- upgrade_class = upgrade_classes[(version_a, version_b)]
- except KeyError:
- raise NotImplementedError, \
- "Cannot convert version '%s' to '%s' yet." \
- % (version_a, version_b)
- u = upgrade_class(path)
- u.upgrade()
- if version_b == target_version:
- break
- i += 1
-
-suite = doctest.DocTestSuite()