revlog: code for `revlogv0` in its own module
This code is mostly unused compatiblity code. Yet it take a prohiminent place in
the `revlog.py` module. That module is already quite big, so we move all that
code in a dedicated module.
Differential Revision: https://phab.mercurial-scm.org/D10511
--- a/mercurial/revlog.py Thu Apr 01 11:31:54 2021 +0200
+++ b/mercurial/revlog.py Thu Apr 08 00:34:16 2021 +0200
@@ -36,7 +36,6 @@
from .revlogutils.constants import (
FLAG_GENERALDELTA,
FLAG_INLINE_DATA,
- INDEX_ENTRY_V0,
INDEX_HEADER,
REVLOGV0,
REVLOGV1,
@@ -76,6 +75,7 @@
deltas as deltautil,
flagutil,
nodemap as nodemaputil,
+ revlogv0,
sidedata as sidedatautil,
)
from .utils import (
@@ -136,14 +136,6 @@
)
-def getoffset(q):
- return int(q >> 16)
-
-
-def gettype(q):
- return int(q & 0xFFFF)
-
-
def offset_type(offset, type):
if (type & ~flagutil.REVIDX_KNOWN_FLAGS) != 0:
raise ValueError(b'unknown revlog index flags')
@@ -214,110 +206,6 @@
node = attr.ib(default=None)
-class revlogoldindex(list):
- entry_size = INDEX_ENTRY_V0.size
-
- @property
- def nodemap(self):
- msg = b"index.nodemap is deprecated, use index.[has_node|rev|get_rev]"
- util.nouideprecwarn(msg, b'5.3', stacklevel=2)
- return self._nodemap
-
- @util.propertycache
- def _nodemap(self):
- nodemap = nodemaputil.NodeMap({sha1nodeconstants.nullid: nullrev})
- for r in range(0, len(self)):
- n = self[r][7]
- nodemap[n] = r
- return nodemap
-
- def has_node(self, node):
- """return True if the node exist in the index"""
- return node in self._nodemap
-
- def rev(self, node):
- """return a revision for a node
-
- If the node is unknown, raise a RevlogError"""
- return self._nodemap[node]
-
- def get_rev(self, node):
- """return a revision for a node
-
- If the node is unknown, return None"""
- return self._nodemap.get(node)
-
- def append(self, tup):
- self._nodemap[tup[7]] = len(self)
- super(revlogoldindex, self).append(tup)
-
- def __delitem__(self, i):
- if not isinstance(i, slice) or not i.stop == -1 or i.step is not None:
- raise ValueError(b"deleting slices only supports a:-1 with step 1")
- for r in pycompat.xrange(i.start, len(self)):
- del self._nodemap[self[r][7]]
- super(revlogoldindex, self).__delitem__(i)
-
- def clearcaches(self):
- self.__dict__.pop('_nodemap', None)
-
- def __getitem__(self, i):
- if i == -1:
- return (0, 0, 0, -1, -1, -1, -1, sha1nodeconstants.nullid)
- return list.__getitem__(self, i)
-
- def entry_binary(self, rev):
- """return the raw binary string representing a revision"""
- entry = self[rev]
- if gettype(entry[0]):
- raise error.RevlogError(
- _(b'index entry flags need revlog version 1')
- )
- e2 = (
- getoffset(entry[0]),
- entry[1],
- entry[3],
- entry[4],
- self[entry[5]][7],
- self[entry[6]][7],
- entry[7],
- )
- return INDEX_ENTRY_V0.pack(*e2)
-
- def pack_header(self, header):
- """Pack header information in binary"""
- return b''
-
-
-def parse_index_v0(data, inline):
- s = INDEX_ENTRY_V0.size
- index = []
- nodemap = nodemaputil.NodeMap({sha1nodeconstants.nullid: nullrev})
- n = off = 0
- l = len(data)
- while off + s <= l:
- cur = data[off : off + s]
- off += s
- e = INDEX_ENTRY_V0.unpack(cur)
- # transform to revlogv1 format
- e2 = (
- offset_type(e[0], 0),
- e[1],
- -1,
- e[2],
- e[3],
- nodemap.get(e[4], nullrev),
- nodemap.get(e[5], nullrev),
- e[6],
- )
- index.append(e2)
- nodemap[e[6]] = n
- n += 1
-
- index = revlogoldindex(index)
- return index, None
-
-
def parse_index_v1(data, inline):
# call the C implementation to parse the index data
index, cache = parsers.parse_index2(data, inline)
@@ -621,7 +509,7 @@
self._parse_index = parse_index_v1
if self.version == REVLOGV0:
- self._parse_index = parse_index_v0
+ self._parse_index = revlogv0.parse_index_v0
elif fmt == REVLOGV2:
self._parse_index = parse_index_v2
elif devel_nodemap:
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/mercurial/revlogutils/revlogv0.py Thu Apr 08 00:34:16 2021 +0200
@@ -0,0 +1,144 @@
+# revlogv0 - code related to revlog format "V0"
+#
+# Copyright 2005-2007 Olivia Mackall <olivia@selenic.com>
+#
+# This software may be used and distributed according to the terms of the
+# GNU General Public License version 2 or any later version.
+from __future__ import absolute_import
+
+
+from ..node import sha1nodeconstants
+from .constants import (
+ INDEX_ENTRY_V0,
+)
+from ..i18n import _
+
+from .. import (
+ error,
+ node,
+ pycompat,
+ util,
+)
+
+from . import (
+ flagutil,
+ nodemap as nodemaputil,
+)
+
+
+def getoffset(q):
+ return int(q >> 16)
+
+
+def gettype(q):
+ return int(q & 0xFFFF)
+
+
+def offset_type(offset, type):
+ if (type & ~flagutil.REVIDX_KNOWN_FLAGS) != 0:
+ raise ValueError(b'unknown revlog index flags')
+ return int(int(offset) << 16 | type)
+
+
+class revlogoldindex(list):
+ entry_size = INDEX_ENTRY_V0.size
+
+ @property
+ def nodemap(self):
+ msg = b"index.nodemap is deprecated, use index.[has_node|rev|get_rev]"
+ util.nouideprecwarn(msg, b'5.3', stacklevel=2)
+ return self._nodemap
+
+ @util.propertycache
+ def _nodemap(self):
+ nodemap = nodemaputil.NodeMap({sha1nodeconstants.nullid: node.nullrev})
+ for r in range(0, len(self)):
+ n = self[r][7]
+ nodemap[n] = r
+ return nodemap
+
+ def has_node(self, node):
+ """return True if the node exist in the index"""
+ return node in self._nodemap
+
+ def rev(self, node):
+ """return a revision for a node
+
+ If the node is unknown, raise a RevlogError"""
+ return self._nodemap[node]
+
+ def get_rev(self, node):
+ """return a revision for a node
+
+ If the node is unknown, return None"""
+ return self._nodemap.get(node)
+
+ def append(self, tup):
+ self._nodemap[tup[7]] = len(self)
+ super(revlogoldindex, self).append(tup)
+
+ def __delitem__(self, i):
+ if not isinstance(i, slice) or not i.stop == -1 or i.step is not None:
+ raise ValueError(b"deleting slices only supports a:-1 with step 1")
+ for r in pycompat.xrange(i.start, len(self)):
+ del self._nodemap[self[r][7]]
+ super(revlogoldindex, self).__delitem__(i)
+
+ def clearcaches(self):
+ self.__dict__.pop('_nodemap', None)
+
+ def __getitem__(self, i):
+ if i == -1:
+ return (0, 0, 0, -1, -1, -1, -1, node.nullid)
+ return list.__getitem__(self, i)
+
+ def pack_header(self, header):
+ """pack header information in binary"""
+ return b''
+
+ def entry_binary(self, rev):
+ """return the raw binary string representing a revision"""
+ entry = self[rev]
+ if gettype(entry[0]):
+ raise error.RevlogError(
+ _(b'index entry flags need revlog version 1')
+ )
+ e2 = (
+ getoffset(entry[0]),
+ entry[1],
+ entry[3],
+ entry[4],
+ self[entry[5]][7],
+ self[entry[6]][7],
+ entry[7],
+ )
+ return INDEX_ENTRY_V0.pack(*e2)
+
+
+def parse_index_v0(data, inline):
+ s = INDEX_ENTRY_V0.size
+ index = []
+ nodemap = nodemaputil.NodeMap({node.nullid: node.nullrev})
+ n = off = 0
+ l = len(data)
+ while off + s <= l:
+ cur = data[off : off + s]
+ off += s
+ e = INDEX_ENTRY_V0.unpack(cur)
+ # transform to revlogv1 format
+ e2 = (
+ offset_type(e[0], 0),
+ e[1],
+ -1,
+ e[2],
+ e[3],
+ nodemap.get(e[4], node.nullrev),
+ nodemap.get(e[5], node.nullrev),
+ e[6],
+ )
+ index.append(e2)
+ nodemap[e[6]] = n
+ n += 1
+
+ index = revlogoldindex(index)
+ return index, None