document new rsync options
related to https://github.com/lektor/lektor/pull/707
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@ -37,3 +37,34 @@ private key without newlines or whitespace. To find out which type your
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key is look at the first line of the key marker. For instance `BEGIN EC
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PRIVATE KEY` indicates an `EC` key. If no key type is defined `RSA` is
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assumed.
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## Deletion Support
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To keep two directories truly in sync when deploying with `rsync`,
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it's necessary to explicitly tell `rsync` to remove files or directories
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on target that don't exist on source anymore. This can be done using the
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`?delete` URL parameter:
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```ini
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[servers.production]
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target = rsync://server/path/to/folder?delete
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```
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If the parameter is provided Lektor will issue a `rsync --delete-delay`,
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which performs deletions after all other transfers ended, and only in case
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there were no failures.
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!!!! Note that the `?delete` option will remove **any file or directory**
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on target that does not exist on source. This means that if you have files
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in the target tree that are not managed by lektor, they will get removed.
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## Exclusion Support
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You can exclude items from being synced by using one or more `exclude`
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parameters. This is also useful in combination with `delete` to prevent
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removal of files in the target tree that are not managed by lektor:
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```ini
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[servers.production]
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target = rsync://server/path/to/folder?delete&exclude=target_item_1&exclude=target_item_2
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```
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