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<p><code>:input</code>: when <code>false</code>, will not ask for input for variables not directly set; defaults to <code>true</code>.</p>
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<p><code>:lock</code>: when <code>true</code>, locks the state file when locking is supported; when <code>false</code>, does not lock the state file; defaults to <code>true</code>.</p>
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<p><code>:lock_timeout</code>: the duration to retry a state lock; defaults to <tt>“0s”</tt>.</p>
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<p><code>:no_backup</code>: (legacy) when <code>