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52166
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1 use std::path::Path;
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2
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3 use dyn_clone::DynClone;
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4
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5 /// The FnCache stores the list of most files contained in the store and is
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6 /// used for stream/copy clones.
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7 ///
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8 /// It keeps track of the name of "all" indexes and data files for all revlogs.
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9 /// The names are relative to the store roots and are stored before any
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10 /// encoding or path compression.
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11 ///
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12 /// Despite its name, the FnCache is *NOT* a cache, it keep tracks of
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13 /// information that is not easily available elsewhere. It has no mechanism
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14 /// for detecting isn't up to date, and de-synchronization with the actual
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15 /// contents of the repository will lead to a corrupted clone and possibly
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16 /// other corruption during maintenance operations.
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17 /// Strictly speaking, it could be recomputed by looking at the contents of all
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18 /// manifests AND actual store files on disk, however that is a
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19 /// prohibitively expensive operation.
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20 pub trait FnCache: Sync + Send + DynClone {
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21 /// Whether the fncache was loaded from disk
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22 fn is_loaded(&self) -> bool;
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23 /// Add a path to be tracked in the fncache
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24 fn add(&self, path: &Path);
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25 // TODO add more methods once we start doing more with the FnCache
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26 }
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