Don't abort when backup files already exist. Don't allow alternative names. Rationale: - When the user wants to revert, he shouldn't be stopped from doing this just because some old backups will be overwritten. - To not clobber important files by accident, alternative names for backup files were disabled. As the backup target now has a fixed name, the user doesn't have to be informed about the backup copy (unless --verbose)

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#!/bin/sh

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hg init a

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echo a > a/a

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hg --cwd a ci -A -m a

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hg clone a b

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echo b > b/b

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hg --cwd b ci -A -m b

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chmod 100 a/.hg

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hg --cwd b push ../a

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chmod 700 a/.hg