fiddling with toolchains

README.md

@@ -1,2 +1 @@
-# bazel_prometheus
-Bazel prometheus rules
+# Prometheus bazel rules

WORKSPACE

@@ -4,6 +4,6 @@ load(":deps.bzl", "prometheus_repositories")
 
 prometheus_repositories()
 
-register_toolchains(
-    "//prometheus/toolchain:all",
-)
+load("@io_bazel_rules_prometheus//prometheus:prometheus.bzl", "prometheus_register_toolchains")
+
+prometheus_register_toolchains()

deps.bzl

@@ -11,5 +11,5 @@ def prometheus_repositories():
         sha256 = "d589a45495cea1aa74bff82335d2145f2d93b8b357c3398739b9139c74dc0cfe",
         urls = [PROMETHEUS_DARWIN_URL],
         strip_prefix = "prometheus-%s.%s" % (PROMETHEUS_VERSION, PROMETHEUS_DARWIN_ARCH),
-        build_file = "@//:prometheus.BUILD",
+        build_file = "@io_bazel_rules_prometheus//:prometheus.BUILD",
     )

prometheus/prometheus.bzl

@@ -3,6 +3,11 @@ load(
     _promtool_config_test = "promtool_config_test",
     _promtool_unit_test = "promtool_unit_test",
 )
+load(
+    "@io_bazel_rules_prometheus//prometheus/toolchain:toolchain.bzl",
+    _prometheus_register_toolchains = "prometheus_register_toolchains",
+)
 
 promtool_unit_test = _promtool_unit_test
 promtool_config_test = _promtool_config_test
+prometheus_register_toolchains = _prometheus_register_toolchains

prometheus/toolchain/BUILD

@@ -2,29 +2,10 @@ package(
     default_visibility = ["//visibility:public"],
 )
 
-load(":toolchain.bzl", "prometheus_toolchain")
+load(":toolchain.bzl", "declare_toolchains")
 
 exports_files(["toolchain.bzl"])
 
 toolchain_type(name = "toolchain_type")
 
-prometheus_toolchain(
-    name = "prometheus_darwin",
-    prometheus = "@prometheus_darwin//:prometheus",
-    promtool = "@prometheus_darwin//:promtool",
-    promtool_executor_template = "//prometheus/internal:promtool.sh.tpl",
-)
-
-toolchain(
-    name = "prometheus_toolchain_darwin",
-    exec_compatible_with = [
-        "@platforms//os:osx",
-        "@platforms//cpu:x86_64",
-    ],
-    target_compatible_with = [
-        "@platforms//os:osx",
-        "@platforms//cpu:x86_64",
-    ],
-    toolchain = ":prometheus_darwin",
-    toolchain_type = ":toolchain_type",
-)
+declare_toolchains()

prometheus/toolchain/toolchain.bzl

@@ -34,3 +34,27 @@ prometheus_toolchain = rule(
     },
     provides = [platform_common.ToolchainInfo],
 )
+
+def declare_toolchains():
+    prometheus_toolchain(
+        name = "prometheus_darwin",
+        prometheus = "@prometheus_darwin//:prometheus",
+        promtool = "@prometheus_darwin//:promtool",
+        promtool_executor_template = "@io_bazel_rules_prometheus//prometheus/internal:promtool.sh.tpl",
+    )
+    native.toolchain(
+        name = "prometheus_toolchain_darwin",
+        exec_compatible_with = [
+            "@platforms//os:osx",
+            "@platforms//cpu:x86_64",
+        ],
+        target_compatible_with = [
+            "@platforms//os:osx",
+            "@platforms//cpu:x86_64",
+        ],
+        toolchain = "@io_bazel_rules_prometheus//prometheus/toolchain:prometheus_darwin",
+        toolchain_type = "@io_bazel_rules_prometheus//prometheus/toolchain:toolchain_type",
+    )
+
+def prometheus_register_toolchains():
+    native.register_toolchains("@io_bazel_rules_prometheus//prometheus/toolchain:all")