100 lines
3 KiB
Python
100 lines
3 KiB
Python
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# -*- coding: utf-8 -*-
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# dirindex.py --- Class used to parse .dirindex files
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#
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# Copyright (C) 2016 Torsten Dreyer
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License as
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# published by the Free Software Foundation; either version 2 of the
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# License, or (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful, but
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# WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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"""Parser for .dirindex files."""
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from .exceptions import InvalidDirIndexFile
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from .virtual_path import VirtualPath
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class DirIndex:
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"""Parser for .dirindex files."""
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def __init__(self, dirIndexFile):
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self.d = []
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self.f = []
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self.t = []
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self.version = 0
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self.path = None # will be a VirtualPath instance when set
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# readFrom() stores the raw contents of the .dirindex file in this
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# attribute. This is useful for troubleshooting.
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self._rawContents = None
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with open(dirIndexFile, "r", encoding="utf-8") as f:
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self.readFrom(f)
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self._sanityCheck()
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def readFrom(self, readable):
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self._rawContents = readable.read()
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for line in self._rawContents.split('\n'):
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line = line.strip()
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if line.startswith('#'):
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continue
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tokens = line.split(':')
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if len(tokens) == 0:
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continue
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if tokens[0] == "version":
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self.version = int(tokens[1])
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elif tokens[0] == "path":
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# This is relative to the repository root
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self.path = VirtualPath(tokens[1])
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elif tokens[0] == "d":
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self.d.append({ 'name': tokens[1], 'hash': tokens[2] })
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elif tokens[0] == "f":
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self.f.append({ 'name': tokens[1],
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'hash': tokens[2], 'size': int(tokens[3]) })
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elif tokens[0] == "t":
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self.t.append({ 'name': tokens[1], 'hash': tokens[2],
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'size': int(tokens[3]) })
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def _sanityCheck(self):
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if self.path is None:
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assert self._rawContents is not None
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firstLines = self._rawContents.split('\n')[:5]
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raise InvalidDirIndexFile(
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"no 'path' field found; the first lines of this .dirindex file "
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"follow:\n\n" + '\n'.join(firstLines))
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def getVersion(self):
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return self.version
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def getPath(self):
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return self.path
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def getDirectories(self):
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return self.d
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def getTarballs(self):
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return self.t
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def getFiles(self):
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return self.f
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