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patch: support diff data loss detection and upgrade...
patch: support diff data loss detection and upgrade In worst case, generating diff in upgrade mode can be two times more expensive than generating it in git mode directly: we may have to regenerate the whole diff again whenever a git feature is detected. Also, the first diff attempt is completely buffered instead of being streamed. That said, even without having profiled it yet, I am convinced we can fast-path the upgrade mode if necessary were it to be used in regular diff commands, and not only in mq where avoiding data loss is worth the price.

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test-symlink-root
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/ tests / test-symlink-root
Jun Inoue
Fix accessing the repo through a symlink.
r4086 #!/bin/sh
Patrick Mezard
test-symlink-basic: require symlinks availability
r4882 "$TESTDIR/hghave" symlink || exit 80
Jun Inoue
Fix accessing the repo through a symlink.
r4086 hg init a
ln -s a link
cd a
echo foo > foo
hg status
hg status ../link