git-annex/ tips/ automatically getting files on checkout

Normally git-annex does not retrieve file contents when checking out a tree. In some use cases, it makes sense to always have the contents of files available after a `git checkout` or `git update`. This can be accomplished by installing the following as `.git/hooks/post-checkout`

    #!/bin/sh
    # Uses git-annex to get all files in the specified directories
    # (relative to the top of the repository) on checkout.
    dirs=.
    top="$(git rev-parse --show-toplevel)"
    for dir in "$dirs"; do git annex get $top/$dir"; done

By default, all files in the whole repository will be made available. The `dirs` setting can be configured if you only want to get files in certian directories.

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