"""
This file exports the various toolchains for the hosts that we support building Skia on.

Supported:
 - Linux amd64
 - Mac (one toolchain for both M1 and Intel CPUs)

Planned:
 - Windows amd64

"""

load(":download_linux_amd64_toolchain.bzl", "download_linux_amd64_toolchain")
load(":download_mac_toolchain.bzl", "download_mac_toolchain")
load(":download_ndk_linux_amd64_toolchain.bzl", "download_ndk_linux_amd64_toolchain")

# This key in this dictionary (and thus the name passed into the rule) controls what the subfolder
# will be called in the external directory. It must match what we use in the appropriate
# toolchain_config.bzl file or it will not be able to locate the sysroot to build with.
name_toolchain = {
    "clang_linux_amd64": download_linux_amd64_toolchain,
    "clang_mac": download_mac_toolchain,
    "ndk_linux_amd64": download_ndk_linux_amd64_toolchain,
}

def download_toolchains_for_skia(*args):
    """
    Point Bazel to the correct rules for downloading the different toolchains.

    Args:
        *args: multiple toolchains, see top of file for
               list of supported toolchains.
    """

    for toolchain_name in args:
        if toolchain_name not in name_toolchain:
            fail("unrecognized toolchain name " + toolchain_name)
        download_toolchain = name_toolchain[toolchain_name]
        download_toolchain(name = toolchain_name)