tests/test-convert-bzr-ghosts

workingctx: correctly compute the flag for noexec filesystems+merge

This bug happens if the filesystem doesn't support exec-bit, during merges,
for example in 24ed7a541f23 on the hg repo.
If f is not in p1, but is in p2 and has the x-bit in p2, since the dirstate is
based on p1, and the FS doesn't support the exec-bit, the dirstate can't
"guess" the right bit.
We instead fix it in workingcontext.flags()/manifest.

#!/bin/sh

. "$TESTDIR/bzr-definitions"

cat > ghostcreator.py <<EOF
import sys
from bzrlib import workingtree
wt = workingtree.WorkingTree.open('.')

message, ghostrev = sys.argv[1:]
wt.set_parent_ids(wt.get_parent_ids() + [ghostrev])
wt.commit(message)
EOF

echo % ghost revisions
mkdir test-ghost-revisions
cd test-ghost-revisions
bzr init -q source
cd source
echo content > somefile
bzr add -q somefile
bzr commit -q -m 'Initial layout setup'
echo morecontent >> somefile
python ../../ghostcreator.py 'Commit with ghost revision' ghostrev
cd ..
hg convert source source-hg
glog -R source-hg