tests/test-export

Fix how setup.py identifies the Mercurial version.

There is a problem with setup.py where it will not identify the Mercurial
version properly when not being ran in within a repository even if
mercurial/__version__.py exists.

To fix, use mercurial.__version__.version when available before defaulting
to "unknown".  (Using mercurial.util.version() is not an option due to a
dependency issue where osutil can be referenced before it is built.)

#!/bin/sh

hg init repo
cd repo
touch foo
hg add foo
for i in 0 1 2 3 4 5 6 7 8 9 10 11; do
    echo "foo-$i" >> foo
    hg ci -m "foo-$i" -d "0 0"
done

for out in "%nof%N" "%%%H" "%b-%R" "%h" "%r"; do
    echo "# foo-$out.patch"
    hg export -v -o "foo-$out.patch" 2:tip
done

echo "# exporting 4 changesets to a file"
hg export -o export_internal 1 2 3 4
grep HG export_internal | wc -l | sed -e 's/^ *//'
echo "# exporting 4 changesets to a file"
hg export 1 2 3 4 | grep HG | wc -l | sed -e 's/^ *//'
echo "# exporting revision -2 to a file"
hg export -- -2