bundlerepo: don't insert index tuples with full nodes as linkrev
The index format has a documented format and latter changes will start
to enforce the field types. The bundlerepo uses full nodes for the
linkrev field when it should be using revision numbers. Use the link
mapping to resolve them, except in the special case of self-references.
Those are actually indications of a missing linkrev.
Differential Revision: https://phab.mercurial-scm.org/D9160
from __future__ import absolute_import, print_function
import collections
import struct
import unittest
from mercurial import mdiff
class diffreplace(collections.namedtuple('diffreplace', 'start end from_ to')):
def __repr__(self):
return 'diffreplace(%r, %r, %r, %r)' % self
class BdiffTests(unittest.TestCase):
def assert_bdiff_applies(self, a, b):
d = mdiff.textdiff(a, b)
c = a
if d:
c = mdiff.patches(a, [d])
self.assertEqual(
c,
b,
(
"bad diff+patch result from\n %r to\n "
"%r: \nbdiff: %r\npatched: %r" % (a, b, d, c[:200])
),
)
def assert_bdiff(self, a, b):
self.assert_bdiff_applies(a, b)
self.assert_bdiff_applies(b, a)
def test_bdiff_basic(self):
cases = [
(b"a\nc\n\n\n\n", b"a\nb\n\n\n"),
(b"a\nb\nc\n", b"a\nc\n"),
(b"", b""),
(b"a\nb\nc", b"a\nb\nc"),
(b"a\nb\nc\nd\n", b"a\nd\n"),
(b"a\nb\nc\nd\n", b"a\nc\ne\n"),
(b"a\nb\nc\n", b"a\nc\n"),
(b"a\n", b"c\na\nb\n"),
(b"a\n", b""),
(b"a\n", b"b\nc\n"),
(b"a\n", b"c\na\n"),
(b"", b"adjfkjdjksdhfksj"),
(b"", b"ab"),
(b"", b"abc"),
(b"a", b"a"),
(b"ab", b"ab"),
(b"abc", b"abc"),
(b"a\n", b"a\n"),
(b"a\nb", b"a\nb"),
]
for a, b in cases:
self.assert_bdiff(a, b)
def showdiff(self, a, b):
bin = mdiff.textdiff(a, b)
pos = 0
q = 0
actions = []
while pos < len(bin):
p1, p2, l = struct.unpack(">lll", bin[pos : pos + 12])
pos += 12
if p1:
actions.append(a[q:p1])
actions.append(diffreplace(p1, p2, a[p1:p2], bin[pos : pos + l]))
pos += l
q = p2
if q < len(a):
actions.append(a[q:])
return actions
def test_issue1295(self):
cases = [
(
b"x\n\nx\n\nx\n\nx\n\nz\n",
b"x\n\nx\n\ny\n\nx\n\nx\n\nz\n",
[
b'x\n\nx\n\n',
diffreplace(6, 6, b'', b'y\n\n'),
b'x\n\nx\n\nz\n',
],
),
(
b"x\n\nx\n\nx\n\nx\n\nz\n",
b"x\n\nx\n\ny\n\nx\n\ny\n\nx\n\nz\n",
[
b'x\n\nx\n\n',
diffreplace(6, 6, b'', b'y\n\n'),
b'x\n\n',
diffreplace(9, 9, b'', b'y\n\n'),
b'x\n\nz\n',
],
),
]
for old, new, want in cases:
self.assertEqual(self.showdiff(old, new), want)
def test_issue1295_varies_on_pure(self):
# we should pick up abbbc. rather than bc.de as the longest match
got = self.showdiff(
b"a\nb\nb\nb\nc\n.\nd\ne\n.\nf\n",
b"a\nb\nb\na\nb\nb\nb\nc\n.\nb\nc\n.\nd\ne\nf\n",
)
want_c = [
b'a\nb\nb\n',
diffreplace(6, 6, b'', b'a\nb\nb\nb\nc\n.\n'),
b'b\nc\n.\nd\ne\n',
diffreplace(16, 18, b'.\n', b''),
b'f\n',
]
want_pure = [
diffreplace(0, 0, b'', b'a\nb\nb\n'),
b'a\nb\nb\nb\nc\n.\n',
diffreplace(12, 12, b'', b'b\nc\n.\n'),
b'd\ne\n',
diffreplace(16, 18, b'.\n', b''),
b'f\n',
]
self.assertTrue(
got in (want_c, want_pure),
'got: %r, wanted either %r or %r' % (got, want_c, want_pure),
)
def test_fixws(self):
cases = [
(b" \ta\r b\t\n", b"ab\n", 1),
(b" \ta\r b\t\n", b" a b\n", 0),
(b"", b"", 1),
(b"", b"", 0),
]
for a, b, allws in cases:
c = mdiff.fixws(a, allws)
self.assertEqual(
c, b, 'fixws(%r) want %r got %r (allws=%r)' % (a, b, c, allws)
)
def test_nice_diff_for_trivial_change(self):
self.assertEqual(
self.showdiff(
b''.join(b'<%d\n-\n' % i for i in range(5)),
b''.join(b'>%d\n-\n' % i for i in range(5)),
),
[
diffreplace(0, 3, b'<0\n', b'>0\n'),
b'-\n',
diffreplace(5, 8, b'<1\n', b'>1\n'),
b'-\n',
diffreplace(10, 13, b'<2\n', b'>2\n'),
b'-\n',
diffreplace(15, 18, b'<3\n', b'>3\n'),
b'-\n',
diffreplace(20, 23, b'<4\n', b'>4\n'),
b'-\n',
],
)
def test_prefer_appending(self):
# 1 line to 3 lines
self.assertEqual(
self.showdiff(b'a\n', b'a\n' * 3),
[b'a\n', diffreplace(2, 2, b'', b'a\na\n')],
)
# 1 line to 5 lines
self.assertEqual(
self.showdiff(b'a\n', b'a\n' * 5),
[b'a\n', diffreplace(2, 2, b'', b'a\na\na\na\n')],
)
def test_prefer_removing_trailing(self):
# 3 lines to 1 line
self.assertEqual(
self.showdiff(b'a\n' * 3, b'a\n'),
[b'a\n', diffreplace(2, 6, b'a\na\n', b'')],
)
# 5 lines to 1 line
self.assertEqual(
self.showdiff(b'a\n' * 5, b'a\n'),
[b'a\n', diffreplace(2, 10, b'a\na\na\na\n', b'')],
)
if __name__ == '__main__':
import silenttestrunner
silenttestrunner.main(__name__)