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由 Shawn O. Pearce 提交于
Some source material (e.g. Subversion dump files) perform directory renames without telling us exactly which files in that subdirectory were moved. This makes it hard for a frontend to convert such data formats to a fast-import stream, as all the frontend has on hand is "Rename a/ to b/" with no details about what files are in a/, unless the frontend also kept track of all files. The new 'R' subcommand within a commit allows the frontend to rename either a file or an entire subdirectory, without needing to know the object's SHA-1 or the specific files contained within it. The rename is performed as efficiently as possible internally, making it cheaper than a 'D'/'M' pair for a file rename. Signed-off-by: NShawn O. Pearce <spearce@spearce.org>
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