tests/test-merge9

localrepo._tag: add a seek before writing the new tag

Some systems require a seek (or flush) between read and write
operations on the same file object.

This should fix issue838.

#!/bin/sh

# test that we don't interrupt the merge session if
# a file-level merge failed

hg init repo
cd repo

echo foo > foo
echo a > bar
hg ci -Am 'add foo' -d '0 0'

hg mv foo baz
echo b >> bar
echo quux > quux1
hg ci -Am 'mv foo baz' -d '0 0'

hg up -qC 0
echo >> foo
echo c >> bar
echo quux > quux2
hg ci -Am 'change foo' -d '0 0'

# test with the rename on the remote side
HGMERGE=false hg merge

# test with the rename on the local side
hg up -C 1
HGMERGE=false hg merge

true