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# Copyright (C) 2012 Codethink Limited
#
# 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; version 2 of the License.
#
# 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.
import StringIO
import morphlib
class MorphologyLoader(object):
'''Load morphologies from git and parse them into Morphology objects.'''
def __init__(self, settings):
self.settings = settings
self.morphologies = {}
def load(self, treeish, filename, chunk_name=None):
key = (treeish, filename)
if key in self.morphologies:
return self.morphologies[key]
else:
try:
morph = self._get_morph_from_git(treeish, filename)
except morphlib.execute.CommandFailure: # pragma: no cover
morph = None
if morph is None and chunk_name is not None: # pragma: no cover
morph = self._autodetect_morph(treeish, filename, chunk_name)
if morph is None: # pragma: no cover
raise Exception("Can't find morphology %s" % filename)
self.morphologies[key] = morph
return morph
def _autodetect_morph(self, treeish, filename, chunk): # pragma: no cover
def exists(x):
try:
self._get_morph_text(treeish, x)
except morphlib.execute.CommandFailure:
return False
else:
return True
bs = morphlib.buildsystem.detect_build_system(exists)
if bs is not None:
morph_text = bs.get_morphology_text(chunk)
return self._get_morph(treeish, filename, morph_text)
else:
return None
def _get_morph_text(self, treeish, filename): # pragma: no cover
return morphlib.git.get_morph_text(treeish, filename)
def _get_morph_from_git(self, treeish, filename):
morph_text = self._get_morph_text(treeish, filename)
return self._get_morph(treeish, filename, morph_text)
def _get_morph(self, treeish, filename, morph_text):
fp = StringIO.StringIO(morph_text)
fp.name = filename
return morphlib.morphology.Morphology(treeish, fp)
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