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# changelog.py - changelog class for mercurial
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#
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# Copyright 2005, 2006 Matt Mackall <mpm@selenic.com>
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#
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# This software may be used and distributed according to the terms
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# of the GNU General Public License, incorporated herein by reference.
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from revlog import *
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from i18n import gettext as _
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from demandload import demandload
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demandload(globals(), "os time util")
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def _string_escape(text):
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"""
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>>> d = {'nl': chr(10), 'bs': chr(92), 'cr': chr(13), 'nul': chr(0)}
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>>> s = "ab%(nl)scd%(bs)s%(bs)sn%(nul)sab%(cr)scd%(bs)s%(nl)s" % d
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>>> s
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'ab\\ncd\\\\\\\\n\\x00ab\\rcd\\\\\\n'
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>>> res = _string_escape(s)
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>>> s == _string_unescape(res)
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True
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"""
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# subset of the string_escape codec
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text = text.replace('\\', '\\\\').replace('\n', '\\n').replace('\r', '\\r')
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return text.replace('\0', '\\0')
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def _string_unescape(text):
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return text.decode('string_escape')
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class changelog(revlog):
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def __init__(self, opener, defversion=REVLOGV0):
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revlog.__init__(self, opener, "00changelog.i", "00changelog.d",
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defversion)
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def decode_extra(self, text):
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extra = {}
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for l in text.split('\0'):
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if not l:
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continue
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k, v = _string_unescape(l).split(':', 1)
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extra[k] = v
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return extra
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def encode_extra(self, d):
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items = [_string_escape(":".join(t)) for t in d.iteritems()]
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return "\0".join(items)
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def extract(self, text):
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"""
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format used:
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nodeid\n : manifest node in ascii
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user\n : user, no \n or \r allowed
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time tz extra\n : date (time is int or float, timezone is int)
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: extra is metadatas, encoded and separated by '\0'
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: older versions ignore it
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files\n\n : files modified by the cset, no \n or \r allowed
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(.*) : comment (free text, ideally utf-8)
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changelog v0 doesn't use extra
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"""
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if not text:
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return (nullid, "", (0, 0), [], "", {})
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last = text.index("\n\n")
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desc = text[last + 2:]
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l = text[:last].split('\n')
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manifest = bin(l[0])
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user = l[1]
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extra_data = l[2].split(' ', 2)
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if len(extra_data) != 3:
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time = float(extra_data.pop(0))
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try:
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# various tools did silly things with the time zone field.
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timezone = int(extra_data[0])
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except:
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timezone = 0
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extra = {}
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else:
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time, timezone, extra = extra_data
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time, timezone = float(time), int(timezone)
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extra = self.decode_extra(extra)
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files = l[3:]
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return (manifest, user, (time, timezone), files, desc, extra)
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def read(self, node):
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return self.extract(self.revision(node))
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def add(self, manifest, list, desc, transaction, p1=None, p2=None,
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user=None, date=None, extra={}):
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if date:
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parseddate = "%d %d" % util.parsedate(date)
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else:
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parseddate = "%d %d" % util.makedate()
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if extra:
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extra = self.encode_extra(extra)
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parseddate = "%s %s" % (parseddate, extra)
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list.sort()
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l = [hex(manifest), user, parseddate] + list + ["", desc]
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text = "\n".join(l)
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return self.addrevision(text, transaction, self.count(), p1, p2)
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