Mercurial > hg
view mercurial/changegroup.py @ 9469:7f0f882af23d
config: abort on indented non-continuation lines (issue1829)
Previously, as soon as a continuation would be met, "cont" would stay
forever set to True, but "item" was set back to "None".
This caused the continuation code bits to run every time, until the next
"self.get(section, item) + '\n'" which would crash.
author | Nicolas Dumazet <nicdumz.commits@gmail.com> |
---|---|
date | Sat, 12 Sep 2009 11:17:07 +0200 |
parents | b87a50b7125c |
children | f48454a279b9 |
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# changegroup.py - Mercurial changegroup manipulation functions # # Copyright 2006 Matt Mackall <mpm@selenic.com> # # This software may be used and distributed according to the terms of the # GNU General Public License version 2, incorporated herein by reference. from i18n import _ import util import struct, os, bz2, zlib, tempfile def getchunk(source): """get a chunk from a changegroup""" d = source.read(4) if not d: return "" l = struct.unpack(">l", d)[0] if l <= 4: return "" d = source.read(l - 4) if len(d) < l - 4: raise util.Abort(_("premature EOF reading chunk" " (got %d bytes, expected %d)") % (len(d), l - 4)) return d def chunkiter(source): """iterate through the chunks in source""" while 1: c = getchunk(source) if not c: break yield c def chunkheader(length): """build a changegroup chunk header""" return struct.pack(">l", length + 4) def closechunk(): return struct.pack(">l", 0) class nocompress(object): def compress(self, x): return x def flush(self): return "" bundletypes = { "": ("", nocompress), "HG10UN": ("HG10UN", nocompress), "HG10BZ": ("HG10", lambda: bz2.BZ2Compressor()), "HG10GZ": ("HG10GZ", lambda: zlib.compressobj()), } # hgweb uses this list to communicate it's preferred type bundlepriority = ['HG10GZ', 'HG10BZ', 'HG10UN'] def writebundle(cg, filename, bundletype): """Write a bundle file and return its filename. Existing files will not be overwritten. If no filename is specified, a temporary file is created. bz2 compression can be turned off. The bundle file will be deleted in case of errors. """ fh = None cleanup = None try: if filename: fh = open(filename, "wb") else: fd, filename = tempfile.mkstemp(prefix="hg-bundle-", suffix=".hg") fh = os.fdopen(fd, "wb") cleanup = filename header, compressor = bundletypes[bundletype] fh.write(header) z = compressor() # parse the changegroup data, otherwise we will block # in case of sshrepo because we don't know the end of the stream # an empty chunkiter is the end of the changegroup # a changegroup has at least 2 chunkiters (changelog and manifest). # after that, an empty chunkiter is the end of the changegroup empty = False count = 0 while not empty or count <= 2: empty = True count += 1 for chunk in chunkiter(cg): empty = False fh.write(z.compress(chunkheader(len(chunk)))) pos = 0 while pos < len(chunk): next = pos + 2**20 fh.write(z.compress(chunk[pos:next])) pos = next fh.write(z.compress(closechunk())) fh.write(z.flush()) cleanup = None return filename finally: if fh is not None: fh.close() if cleanup is not None: os.unlink(cleanup) def unbundle(header, fh): if header == 'HG10UN': return fh elif not header.startswith('HG'): # old client with uncompressed bundle def generator(f): yield header for chunk in f: yield chunk elif header == 'HG10GZ': def generator(f): zd = zlib.decompressobj() for chunk in f: yield zd.decompress(chunk) elif header == 'HG10BZ': def generator(f): zd = bz2.BZ2Decompressor() zd.decompress("BZ") for chunk in util.filechunkiter(f, 4096): yield zd.decompress(chunk) return util.chunkbuffer(generator(fh)) def readbundle(fh, fname): header = fh.read(6) if not header.startswith('HG'): raise util.Abort(_('%s: not a Mercurial bundle file') % fname) if not header.startswith('HG10'): raise util.Abort(_('%s: unknown bundle version') % fname) elif header not in bundletypes: raise util.Abort(_('%s: unknown bundle compression type') % fname) return unbundle(header, fh)