Make MockPlatformSupport more flexible, and clean up uses of @bazel_tools//platforms in tests.

PiperOrigin-RevId: 359280438
diff --git a/src/main/java/com/google/devtools/build/lib/bazel/rules/android/android_ndk_cc_toolchain_template.txt b/src/main/java/com/google/devtools/build/lib/bazel/rules/android/android_ndk_cc_toolchain_template.txt
index d622f0c..6e6c5c9 100644
--- a/src/main/java/com/google/devtools/build/lib/bazel/rules/android/android_ndk_cc_toolchain_template.txt
+++ b/src/main/java/com/google/devtools/build/lib/bazel/rules/android/android_ndk_cc_toolchain_template.txt
@@ -29,8 +29,8 @@
 toolchain(
     name = "%toolchainName%_toolchain",
     target_compatible_with = [
-        "@bazel_tools//platforms:android",
-        "@bazel_tools//platforms:%platform_cpu%",
+        "@platforms//os:android",
+        "@platforms//cpu:%platform_cpu%",
     ],
     toolchain = "@androidndk//:%toolchainName%",
     toolchain_type = "@bazel_tools//tools/cpp:toolchain_type",
diff --git a/src/main/java/com/google/devtools/build/lib/rules/platform/PlatformRule.java b/src/main/java/com/google/devtools/build/lib/rules/platform/PlatformRule.java
index 370a976..2f6902e 100644
--- a/src/main/java/com/google/devtools/build/lib/rules/platform/PlatformRule.java
+++ b/src/main/java/com/google/devtools/build/lib/rules/platform/PlatformRule.java
@@ -51,7 +51,7 @@
         <p>Each <code>constraint_value</code> in this list must be for a different
         <code>constraint_setting</code>. For example, you cannot define a platform that requires the
         cpu architecture to be both <code>@platforms//cpu:x86_64</code> and
-        <code>@bazel_tools//platforms:arm</code>.
+        <code>@platforms//cpu:arm</code>.
         <!-- #END_BLAZE_RULE.ATTRIBUTE --> */
         .add(
             attr(CONSTRAINT_VALUES_ATTR, BuildType.LABEL_LIST)
diff --git a/src/test/java/com/google/devtools/build/lib/packages/util/MockPlatformSupport.java b/src/test/java/com/google/devtools/build/lib/packages/util/MockPlatformSupport.java
index 8c6ce70..74d39e7 100644
--- a/src/test/java/com/google/devtools/build/lib/packages/util/MockPlatformSupport.java
+++ b/src/test/java/com/google/devtools/build/lib/packages/util/MockPlatformSupport.java
@@ -23,12 +23,28 @@
 
   /** Adds mocks for basic host and target platform. */
   public static void setup(MockToolsConfig mockToolsConfig) throws IOException {
+    setup(
+        mockToolsConfig,
+        TestConstants.PLATFORM_PACKAGE_ROOT,
+        TestConstants.PLATFORMS_PATH,
+        TestConstants.CONSTRAINTS_PACKAGE_ROOT,
+        TestConstants.CONSTRAINTS_PATH);
+  }
+
+  /** Adds mocks for basic host and target platform. */
+  public static void setup(
+      MockToolsConfig mockToolsConfig,
+      String platformPackageRoot,
+      String platformsPath,
+      String constraintsPackageRoot,
+      String constraintsPath)
+      throws IOException {
     mockToolsConfig.create(
-        TestConstants.CONSTRAINTS_PATH + "/BUILD",
+        constraintsPath + "/BUILD",
         "package(default_visibility=['//visibility:public'])",
         "licenses(['notice'])");
     mockToolsConfig.create(
-        TestConstants.CONSTRAINTS_PATH + "/cpu/BUILD",
+        constraintsPath + "/cpu/BUILD",
         "package(default_visibility=['//visibility:public'])",
         "licenses(['notice'])",
         "constraint_setting(name = 'cpu')",
@@ -57,7 +73,7 @@
         "    constraint_setting = ':cpu',",
         ")");
     mockToolsConfig.create(
-        TestConstants.CONSTRAINTS_PATH + "/os/BUILD",
+        constraintsPath + "/os/BUILD",
         "package(default_visibility=['//visibility:public'])",
         "licenses(['notice'])",
         "constraint_setting(name = 'os')",
@@ -90,32 +106,30 @@
         "    constraint_setting = ':os',",
         ")");
     mockToolsConfig.create(
-        TestConstants.PLATFORMS_PATH + "/BUILD",
+        platformsPath + "/BUILD",
         "package(default_visibility=['//visibility:public'])",
-        "constraint_setting(name = 'os')",
-        "constraint_value(name = 'android', constraint_setting = ':os')",
         "platform(",
         "    name = 'default_target',",
         "    constraint_values = [",
         // Regardless of the actual machine the tests are run on, hardcode everything to a single
         // default value for simplicity.
-        "        '" + TestConstants.CONSTRAINTS_PACKAGE_ROOT + "cpu:x86_64',",
-        "        '" + TestConstants.CONSTRAINTS_PACKAGE_ROOT + "os:linux',",
-        "        '" + TestConstants.PLATFORM_PACKAGE_ROOT + "/java/constraints:jdk11',",
-        "        '" + TestConstants.PLATFORM_PACKAGE_ROOT + "/java/constraints:java8',",
+        "        '" + constraintsPackageRoot + "cpu:x86_64',",
+        "        '" + constraintsPackageRoot + "os:linux',",
+        "        '" + platformPackageRoot + "/java/constraints:jdk11',",
+        "        '" + platformPackageRoot + "/java/constraints:java8',",
         "    ],",
         ")",
         "platform(",
         "    name = 'default_host',",
         "    constraint_values = [",
-        "        '" + TestConstants.CONSTRAINTS_PACKAGE_ROOT + "cpu:x86_64',",
-        "        '" + TestConstants.CONSTRAINTS_PACKAGE_ROOT + "os:linux',",
-        "        '" + TestConstants.PLATFORM_PACKAGE_ROOT + "/java/constraints:jdk11',",
-        "        '" + TestConstants.PLATFORM_PACKAGE_ROOT + "/java/constraints:java8',",
+        "        '" + constraintsPackageRoot + "cpu:x86_64',",
+        "        '" + constraintsPackageRoot + "os:linux',",
+        "        '" + platformPackageRoot + "/java/constraints:jdk11',",
+        "        '" + platformPackageRoot + "/java/constraints:java8',",
         "    ],",
         ")");
     mockToolsConfig.create(
-        TestConstants.PLATFORMS_PATH + "/java/constraints/BUILD",
+        platformsPath + "/java/constraints/BUILD",
         "package(default_visibility = ['//visibility:public'])",
         "constraint_setting(name = 'runtime')",
         "constraint_value(",
diff --git a/tools/android/android_sdk_repository_template.bzl b/tools/android/android_sdk_repository_template.bzl
index 5fb1da3..3eb23a0 100644
--- a/tools/android/android_sdk_repository_template.bzl
+++ b/tools/android/android_sdk_repository_template.bzl
@@ -165,7 +165,7 @@
             toolchain_type = "@bazel_tools//tools/android:sdk_toolchain_type",
             exec_compatible_with = HOST_CONSTRAINTS,
             target_compatible_with = [
-                "@bazel_tools//platforms:android",
+                "@platforms//os:android",
             ],
             toolchain = ":sdk-%d" % api_level,
         )