func parseDirectory()

in Sources/TSFCASFileTree/Internal/FileTreeParser.swift [129:160]
27 lines of code
6 McCabe index (conditional complexity)

    func parseDirectory(id: LLBDataID, path: AbsolutePath, casObject: LLBCASObject) throws -> (LLBFilesystemObject, [AnnotatedCASTreeChunk]) {

        let posixDetails: LLBPosixFileDetails?
        let dirContents: [LLBDirectoryEntry]
        let dirInfo = try LLBFileInfo.deserialize(from: casObject.data)
        guard dirInfo.type == .directory else {
            throw LLBCASFileTreeFormatError.formatError(reason: "\(id): object is not a directory")
        }
        guard case let .inlineChildren(children) = dirInfo.payload else {
            throw LLBCASFileTreeFormatError.formatError(reason: "\(id): directory doesn't specify children")
        }
        dirContents = children.entries
        posixDetails = LLBPosixFileDetails(from: dirInfo)

        if casObject.refs.count < dirContents.count {
            throw LLBCASFileTreeFormatError.unexpectedDirectoryData(id)
        }

        let fsObject = LLBFilesystemObject(path, .directory, posixDetails: posixDetails)

        let others: [AnnotatedCASTreeChunk]
        others = try zip(casObject.refs, dirContents).map { args in
            let (id, info) = args
            guard info.name != "" && info.name != "." && info.name != ".." && !info.name.contains("/") else {
                throw LLBCASFileTreeFormatError.formatError(reason: "\(String(reflecting: info.name)): unexpected directory entry")
            }

            let kind = AnnotatedCASTreeChunk.ItemKind(type: info.type, posixDetails: LLBPosixFileDetails(from: info), overestimatedSize: info.size)
            return AnnotatedCASTreeChunk(id, path.appending(component: info.name), kind: kind)
        }
        return (fsObject, others)
    }