If the user created the clone target directory before running
the clone command, only cleanup the .hg/ repository when errors
occur. Leave the empty target directory in place.
Usually the caller is commands.run().
Some extensions still use sys.exit(), this is catched, too.
Fixed wrong return statement in commands.recover() yielding a zero exit code.
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Hash: SHA1
[PATCH] Tests for clone command
From: Bryan O'Sullivan <bos@serpentine.com>
This patch adds two new tests. One tests clone's correct operation, the
other that clone fails when it should.
This patch depends on oserror.patch.
manifest hash: a0c9c4932baf29e7b33b2bd2003ddd2254ce65d3
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