blob: b70d8e2393d570f958d40a78af639ec3033a0b08 [file] [log] [blame]
"""Utility functions for the cargo rules"""
load("//rust/platform:triple_mappings.bzl", "system_to_binary_ext")
def _resolve_repository_template(
template,
abi = None,
arch = None,
channel = None,
system = None,
tool = None,
triple = None,
vendor = None,
version = None):
"""Render values into a repository template string
Args:
template (str): The template to use for rendering
abi (str, optional): The host ABI
arch (str, optional): The host CPU architecture
channel (str, optional): The toolchain channel. Eg. `stable`, `nightly`.
system (str, optional): The host system name
tool (str, optional): The tool to expect in the particular repository.
Eg. `cargo`, `rustc`, `stdlib`.
triple (str, optional): The host triple
vendor (str, optional): The host vendor name
version (str, optional): The Rust version used in the toolchain.
Returns:
string: The resolved template string based on the given parameters
"""
if abi:
template = template.replace("{abi}", abi)
if arch:
template = template.replace("{arch}", arch)
if system:
template = template.replace("{system}", system)
if tool:
template = template.replace("{tool}", tool)
if triple:
template = template.replace("{triple}", triple)
if vendor:
template = template.replace("{vendor}", vendor)
if version:
template = template.replace("{version}", version)
if channel:
template = template.replace("{channel}", channel)
return template
def get_rust_tools(cargo_template, rustc_template, host_triple, channel, version):
"""Retrieve `cargo` and `rustc` labels based on the host triple.
Args:
cargo_template (str): A template used to identify the label of the host `cargo` binary.
rustc_template (str): A template used to identify the label of the host `rustc` binary.
host_triple (struct): The host's triple. See `@rules_rust//rust/platform:triple.bzl`.
channel (str): The Rust toolchain channel.
version (str): The version (or iso date in case of beta or nightly channels) of Cargo+Rustc to use.
Returns:
struct: A struct containing the labels of expected tools
"""
extension = system_to_binary_ext(host_triple.system)
cargo_label = Label(_resolve_repository_template(
template = cargo_template,
version = version,
channel = channel,
triple = host_triple.str,
arch = host_triple.arch,
vendor = host_triple.vendor,
system = host_triple.system,
abi = host_triple.abi,
tool = "cargo" + extension,
))
rustc_label = Label(_resolve_repository_template(
template = rustc_template,
version = version,
channel = channel,
triple = host_triple.str,
arch = host_triple.arch,
vendor = host_triple.vendor,
system = host_triple.system,
abi = host_triple.abi,
tool = "rustc" + extension,
))
return struct(
cargo = cargo_label,
rustc = rustc_label,
)