ERROR: Failed to load Starlark extension '@@host_platform//:constraints.bzl'.
Cycle in the workspace file detected. This indicates that a repository is used prior to being defined.
The following chain of repository dependencies lead to the missing definition.
- @@host_platform
This could either mean you have to add the '@@host_platform' repository with a statement like `http_archive` in your WORKSPACE file (note that transitive dependencies are not added automatically), or move an existing definition earlier in your WORKSPACE file.
ERROR: Error computing the main repository mapping: cycles detected during computation of main repo mapping

load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
load("@local_config_platform//:constraints.bzl", "HOST_CONSTRAINTS")

def get_host_cpu():
cpu_constraint = "@platforms//cpu:"
for constraint in HOST_CONSTRAINTS:
if constraint.startswith(cpu_constraint):
return constraint[len(cpu_constraint):]
return

def get_host_os():
cpu_constraint = "@platforms//os:"
for constraint in HOST_CONSTRAINTS:
if constraint.startswith(cpu_constraint):
return constraint[len(cpu_constraint):]
return

def get_host_target():
return get_host_os() + "-" + get_host_cpu()


def packages():
http_archive(
name = "test",
url = "https://some.host/test/" + get_host_target(),
)

load("lib.bzl", "packages")
packages()