Move TraceInfo to a new place

doc_build/BUILD

@@ -59,6 +59,7 @@ ORDER = [
     ("LicenseInfo",     "//rules:providers.bzl"),
     ("LicenseKindInfo", "//rules:providers.bzl"),
     ("PackageInfo",     "//rules:providers.bzl"),
+    ("trace",           "//rules_gathering:trace.bzl"),
 ]
 
 genrule(
@@ -90,7 +91,7 @@ bzl_library(
         "//:version.bzl",
         "//rules:standard_package",
         "//rules/private:standard_package",
-        # "@bazel_skylib//lib:paths",
+        "//rules_gathering:standard_package",
     ],
     visibility = ["//visibility:public"],
 )

rules/BUILD

@@ -15,7 +15,7 @@
 # limitations under the License.
 """Rules for making license declarations."""
 
-load("@rules_license//rules:licenses_core.bzl", "trace")
+load("@rules_license//rules_gathering:trace.bzl", "trace")
 
 package(
     default_applicable_licenses = ["//:license"],

rules/gather_licenses_info.bzl

@@ -15,14 +15,14 @@
 
 load(
     "@rules_license//rules:licenses_core.bzl",
-    "TraceInfo",
     "gather_metadata_info_common",
     "should_traverse",
 )
 load(
     "@rules_license//rules/private:gathering_providers.bzl",
     "TransitiveLicensesInfo",
 )
+load("@rules_license//rules_gathering:trace.bzl", "TraceInfo")
 
 def _strip_null_repo(label):
     """Removes the null repo name (e.g. @//) from a string.

rules/gather_metadata.bzl

@@ -15,7 +15,6 @@
 
 load(
     "@rules_license//rules:licenses_core.bzl",
-    "TraceInfo",
     "gather_metadata_info_common",
     "should_traverse",
 )
@@ -28,6 +27,7 @@ load(
     "@rules_license//rules/private:gathering_providers.bzl",
     "TransitiveMetadataInfo",
 )
+load("@rules_license//rules_gathering:trace.bzl", "TraceInfo")
 
 def _strip_null_repo(label):
     """Removes the null repo name (e.g. @//) from a string.

rules/licenses_core.bzl

@@ -14,33 +14,14 @@
 """Rules and macros for collecting LicenseInfo providers."""
 
 load("@rules_license//rules:filtered_rule_kinds.bzl", "aspect_filters")
+load("@rules_license//rules:providers.bzl", "LicenseInfo")
 load("@rules_license//rules:user_filtered_rule_kinds.bzl", "user_aspect_filters")
-load(
-    "@rules_license//rules:providers.bzl",
-    "LicenseInfo",
-)
 load(
     "@rules_license//rules/private:gathering_providers.bzl",
     "LicensedTargetInfo",
     "TransitiveLicensesInfo",
 )
-
-
-TraceInfo = provider(
-    doc = """Provides a target (as a string) to assist in debugging dependency issues.""",
-    fields = {
-        "trace": "String: a target to trace dependency edges to.",
-    },
-)
-
-def _trace_impl(ctx):
-    return TraceInfo(trace = ctx.build_setting_value)
-
-trace = rule(
-    doc = """Used to allow the specification of a target to trace while collecting license dependencies.""",
-    implementation = _trace_impl,
-    build_setting = config.string(flag = True),
-)
+load("@rules_license//rules_gathering:trace.bzl", "TraceInfo")
 
 def should_traverse(ctx, attr):
     """Checks if the dependent attribute should be traversed.

rules_gathering/BUILD

@@ -0,0 +1,33 @@
+# Copyright 2023 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+"""Rules for making license declarations."""
+
+package(
+    default_applicable_licenses = ["//:license"],
+    default_visibility = ["//visibility:public"],
+)
+
+filegroup(
+    name = "standard_package",
+    srcs = glob(["**"]),
+)
+
+# Do not create a bzl_library(). That would create a dependency loop back
+# to bazel-skylib. We export the .bzl files to the documentation maker.
+exports_files(
+    glob([
+        "*.bzl",
+    ]),
+    visibility = ["//doc_build:__pkg__"],
+)

rules_gathering/trace.bzl

@@ -0,0 +1,30 @@
+# Copyright 2022 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+"""Rules and macros for collecting package metdata providers."""
+
+TraceInfo = provider(
+    doc = """Provides a target (as a string) to assist in debugging dependency issues.""",
+    fields = {
+        "trace": "String: a target to trace dependency edges to.",
+    },
+)
+
+def _trace_impl(ctx):
+    return TraceInfo(trace = ctx.build_setting_value)
+
+trace = rule(
+    doc = """Used to allow the specification of a target to trace while collecting license dependencies.""",
+    implementation = _trace_impl,
+    build_setting = config.string(flag = True),
+)