Mercurial > hg
view mercurial/changelog.py @ 6179:36ab165abbe2
patch: fix iterhunks() with trailing binary file removal
Like some renames or copy operations, binary file removal does not generate any
"file" or "hunk" action, but was not tagged as such and let iterhunk() assume
no hunk was applied for the deleted file.
author | Patrick Mezard <pmezard@gmail.com> |
---|---|
date | Thu, 28 Feb 2008 00:07:37 +0100 |
parents | d09ccdbf7286 |
children | f89fd07fc51d |
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# changelog.py - changelog class for mercurial # # Copyright 2005-2007 Matt Mackall <mpm@selenic.com> # # This software may be used and distributed according to the terms # of the GNU General Public License, incorporated herein by reference. from revlog import * from i18n import _ import os, time, util def _string_escape(text): """ >>> d = {'nl': chr(10), 'bs': chr(92), 'cr': chr(13), 'nul': chr(0)} >>> s = "ab%(nl)scd%(bs)s%(bs)sn%(nul)sab%(cr)scd%(bs)s%(nl)s" % d >>> s 'ab\\ncd\\\\\\\\n\\x00ab\\rcd\\\\\\n' >>> res = _string_escape(s) >>> s == res.decode('string_escape') True """ # subset of the string_escape codec text = text.replace('\\', '\\\\').replace('\n', '\\n').replace('\r', '\\r') return text.replace('\0', '\\0') class appender: '''the changelog index must be update last on disk, so we use this class to delay writes to it''' def __init__(self, fp, buf): self.data = buf self.fp = fp self.offset = fp.tell() self.size = util.fstat(fp).st_size def end(self): return self.size + len("".join(self.data)) def tell(self): return self.offset def flush(self): pass def close(self): self.fp.close() def seek(self, offset, whence=0): '''virtual file offset spans real file and data''' if whence == 0: self.offset = offset elif whence == 1: self.offset += offset elif whence == 2: self.offset = self.end() + offset if self.offset < self.size: self.fp.seek(self.offset) def read(self, count=-1): '''only trick here is reads that span real file and data''' ret = "" if self.offset < self.size: s = self.fp.read(count) ret = s self.offset += len(s) if count > 0: count -= len(s) if count != 0: doff = self.offset - self.size self.data.insert(0, "".join(self.data)) del self.data[1:] s = self.data[0][doff:doff+count] self.offset += len(s) ret += s return ret def write(self, s): self.data.append(str(s)) self.offset += len(s) class changelog(revlog): def __init__(self, opener): revlog.__init__(self, opener, "00changelog.i") def delayupdate(self): "delay visibility of index updates to other readers" self._realopener = self.opener self.opener = self._delayopener self._delaycount = self.count() self._delaybuf = [] self._delayname = None def finalize(self, tr): "finalize index updates" self.opener = self._realopener # move redirected index data back into place if self._delayname: util.rename(self._delayname + ".a", self._delayname) elif self._delaybuf: fp = self.opener(self.indexfile, 'a') fp.write("".join(self._delaybuf)) fp.close() del self._delaybuf # split when we're done self.checkinlinesize(tr) def _delayopener(self, name, mode='r'): fp = self._realopener(name, mode) # only divert the index if not name == self.indexfile: return fp # if we're doing an initial clone, divert to another file if self._delaycount == 0: self._delayname = fp.name return self._realopener(name + ".a", mode) # otherwise, divert to memory return appender(fp, self._delaybuf) def checkinlinesize(self, tr, fp=None): if self.opener == self._delayopener: return return revlog.checkinlinesize(self, tr, fp) def decode_extra(self, text): extra = {} for l in text.split('\0'): if l: k, v = l.decode('string_escape').split(':', 1) extra[k] = v return extra def encode_extra(self, d): # keys must be sorted to produce a deterministic changelog entry keys = d.keys() keys.sort() items = [_string_escape('%s:%s' % (k, d[k])) for k in keys] return "\0".join(items) def read(self, node): """ format used: nodeid\n : manifest node in ascii user\n : user, no \n or \r allowed time tz extra\n : date (time is int or float, timezone is int) : extra is metadatas, encoded and separated by '\0' : older versions ignore it files\n\n : files modified by the cset, no \n or \r allowed (.*) : comment (free text, ideally utf-8) changelog v0 doesn't use extra """ text = self.revision(node) if not text: return (nullid, "", (0, 0), [], "", {'branch': 'default'}) last = text.index("\n\n") desc = util.tolocal(text[last + 2:]) l = text[:last].split('\n') manifest = bin(l[0]) user = util.tolocal(l[1]) extra_data = l[2].split(' ', 2) if len(extra_data) != 3: time = float(extra_data.pop(0)) try: # various tools did silly things with the time zone field. timezone = int(extra_data[0]) except: timezone = 0 extra = {} else: time, timezone, extra = extra_data time, timezone = float(time), int(timezone) extra = self.decode_extra(extra) if not extra.get('branch'): extra['branch'] = 'default' files = l[3:] return (manifest, user, (time, timezone), files, desc, extra) def add(self, manifest, list, desc, transaction, p1=None, p2=None, user=None, date=None, extra={}): user, desc = util.fromlocal(user), util.fromlocal(desc) if date: parseddate = "%d %d" % util.parsedate(date) else: parseddate = "%d %d" % util.makedate() if extra and extra.get("branch") in ("default", ""): del extra["branch"] if extra: extra = self.encode_extra(extra) parseddate = "%s %s" % (parseddate, extra) list.sort() l = [hex(manifest), user, parseddate] + list + ["", desc] text = "\n".join(l) return self.addrevision(text, transaction, self.count(), p1, p2)