fx fetch-toolchain

从 CAS 下载工具链并打印说明

usage: fx fetch-toolchain <CAS_DIGEST>

Downloads the toolchain specified by <CAS_DIGEST> to $FUCHSIA_DIR/local/toolchain/<CAS_DIGEST>.
Prints instructions for how to use it with `fx set` or in `args.gn`.

fetch-toolchain 源代码