tests/test-context.py

convert: add config option for disabling ancestor parent checks

When converting merge commits, convert checks if any of the parents are
ancestors of any of the other parents. To do this, it builds an ancestor list
for every commit in the repository. On large repos this can take a long time
(30min+). Let's add an option for disabling this check to preserve performance.

The downside of this is that it may create unnecessary parent connections when
enabled (which is unfortunate, but not incorrect).

To verify, I ran the convert tests with the flag enabled, and verified the graph
changes were all just to add new parents that were ancestors of existing
parents.

import os
from mercurial import hg, ui, context, encoding

u = ui.ui()

repo = hg.repository(u, 'test1', create=1)
os.chdir('test1')

# create 'foo' with fixed time stamp
f = open('foo', 'wb')
f.write('foo\n')
f.close()
os.utime('foo', (1000, 1000))

# add+commit 'foo'
repo[None].add(['foo'])
repo.commit(text='commit1', date="0 0")

print "workingfilectx.date =", repo[None]['foo'].date()

# test memctx with non-ASCII commit message

def filectxfn(repo, memctx, path):
    return context.memfilectx(repo, "foo", "")

ctx = context.memctx(repo, ['tip', None],
                     encoding.tolocal("Gr\xc3\xbcezi!"),
                     ["foo"], filectxfn)
ctx.commit()
for enc in "ASCII", "Latin-1", "UTF-8":
    encoding.encoding = enc
    print "%-8s: %s" % (enc, repo["tip"].description())

# test performing a status

def getfilectx(repo, memctx, f):
    fctx = memctx.parents()[0][f]
    data, flags = fctx.data(), fctx.flags()
    if f == 'foo':
        data += 'bar\n'
    return context.memfilectx(repo, f, data, 'l' in flags, 'x' in flags)

ctxa = repo.changectx(0)
ctxb = context.memctx(repo, [ctxa.node(), None], "test diff", ["foo"],
                      getfilectx, ctxa.user(), ctxa.date())

print ctxb.status(ctxa)

# test performing a diff on a memctx

for d in ctxb.diff(ctxa, git=True):
    print d

# test safeness and correctness of "ctx.status()"
print '= checking context.status():'

# ancestor "wcctx ~ 2"
actx2 = repo['.']

repo.wwrite('bar-m', 'bar-m\n', '')
repo.wwrite('bar-r', 'bar-r\n', '')
repo[None].add(['bar-m', 'bar-r'])
repo.commit(text='add bar-m, bar-r', date="0 0")

# ancestor "wcctx ~ 1"
actx1 = repo['.']

repo.wwrite('bar-m', 'bar-m bar-m\n', '')
repo.wwrite('bar-a', 'bar-a\n', '')
repo[None].add(['bar-a'])
repo[None].forget(['bar-r'])

# status at this point:
#   M bar-m
#   A bar-a
#   R bar-r
#   C foo

from mercurial import scmutil

print '== checking workingctx.status:'

wctx = repo[None]
print 'wctx._status=%s' % (str(wctx._status))

print '=== with "pattern match":'
print actx1.status(other=wctx,
                   match=scmutil.matchfiles(repo, ['bar-m', 'foo']))
print 'wctx._status=%s' % (str(wctx._status))
print actx2.status(other=wctx,
                   match=scmutil.matchfiles(repo, ['bar-m', 'foo']))
print 'wctx._status=%s' % (str(wctx._status))

print '=== with "always match" and "listclean=True":'
print actx1.status(other=wctx, listclean=True)
print 'wctx._status=%s' % (str(wctx._status))
print actx2.status(other=wctx, listclean=True)
print 'wctx._status=%s' % (str(wctx._status))

print "== checking workingcommitctx.status:"

wcctx = context.workingcommitctx(repo,
                                 scmutil.status(['bar-m'],
                                                ['bar-a'],
                                                [],
                                                [], [], [], []),
                                 text='', date='0 0')
print 'wcctx._status=%s' % (str(wcctx._status))

print '=== with "always match":'
print actx1.status(other=wcctx)
print 'wcctx._status=%s' % (str(wcctx._status))
print actx2.status(other=wcctx)
print 'wcctx._status=%s' % (str(wcctx._status))

print '=== with "always match" and "listclean=True":'
print actx1.status(other=wcctx, listclean=True)
print 'wcctx._status=%s' % (str(wcctx._status))
print actx2.status(other=wcctx, listclean=True)
print 'wcctx._status=%s' % (str(wcctx._status))

print '=== with "pattern match":'
print actx1.status(other=wcctx,
                   match=scmutil.matchfiles(repo, ['bar-m', 'foo']))
print 'wcctx._status=%s' % (str(wcctx._status))
print actx2.status(other=wcctx,
                   match=scmutil.matchfiles(repo, ['bar-m', 'foo']))
print 'wcctx._status=%s' % (str(wcctx._status))

print '=== with "pattern match" and "listclean=True":'
print actx1.status(other=wcctx,
                   match=scmutil.matchfiles(repo, ['bar-r', 'foo']),
                   listclean=True)
print 'wcctx._status=%s' % (str(wcctx._status))
print actx2.status(other=wcctx,
                   match=scmutil.matchfiles(repo, ['bar-r', 'foo']),
                   listclean=True)
print 'wcctx._status=%s' % (str(wcctx._status))