in Sources/Tools/llcastool/CASCommands.swift [30:41]
func run() throws {
let fileSize = try localFileSystem.getFileInfo(path).size
stderrStream <<< "importing \(path.basename), \(prettyFileSize(fileSize))\n"
stderrStream.flush()
let group = LLBMakeDefaultDispatchGroup()
let ctx = Context()
let toolOptions = self.options.toToolOptions()
let tool = try LLBCASTool(group: group, toolOptions)
let dataID = try tool.casPut(file: path, ctx).wait()
print(dataID)
}