Revert "Restrict plugins to an existing allowlist"

This reverts commit 09ddb3a73e14823d51d8227ecaf1997fa010bc14.

Reason for revert: breaks branches without vendor

Change-Id: I2de95d7b99e4e5fd3d696f51d5b4d6a68a298365
diff --git a/android/Android.bp b/android/Android.bp
index 94d2c04..118087d 100644
--- a/android/Android.bp
+++ b/android/Android.bp
@@ -77,7 +77,6 @@
         "path_properties.go",
         "paths.go",
         "phony.go",
-        "plugin.go",
         "prebuilt.go",
         "prebuilt_build_tool.go",
         "proto.go",
diff --git a/android/config.go b/android/config.go
index e0cf173..7141e54 100644
--- a/android/config.go
+++ b/android/config.go
@@ -1819,10 +1819,6 @@
 	return uncheckedFinalApiLevel(apiLevel)
 }
 
-func (c *deviceConfig) BuildBrokenPluginValidation() []string {
-	return c.config.productVariables.BuildBrokenPluginValidation
-}
-
 func (c *deviceConfig) BuildBrokenClangAsFlags() bool {
 	return c.config.productVariables.BuildBrokenClangAsFlags
 }
diff --git a/android/plugin.go b/android/plugin.go
deleted file mode 100644
index 5be3d3a..0000000
--- a/android/plugin.go
+++ /dev/null
@@ -1,139 +0,0 @@
-// Copyright 2022 Google Inc. All rights reserved.
-//
-// 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
-//
-//     http://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.
-
-package android
-
-import (
-	"encoding/json"
-	"fmt"
-	"io/ioutil"
-	"os"
-	"strings"
-
-	"github.com/google/blueprint"
-)
-
-func init() {
-	RegisterPluginSingletonBuildComponents(InitRegistrationContext)
-}
-
-func RegisterPluginSingletonBuildComponents(ctx RegistrationContext) {
-	ctx.RegisterSingletonType("plugins", pluginSingletonFactory)
-}
-
-// pluginSingleton is a singleton to handle allowlisting of the final Android-<product_name>.mk file
-// output.
-func pluginSingletonFactory() Singleton {
-	return &pluginSingleton{}
-}
-
-type pluginSingleton struct{}
-
-var allowedPluginsByName = map[string]bool{
-	"aidl-soong-rules":                       true,
-	"arm_compute_library_nn_driver":          true,
-	"cuttlefish-soong-rules":                 true,
-	"gki-soong-rules":                        true,
-	"hidl-soong-rules":                       true,
-	"kernel-config-soong-rules":              true,
-	"soong-angle-codegen":                    true,
-	"soong-api":                              true,
-	"soong-art":                              true,
-	"soong-ca-certificates":                  true,
-	"soong-clang":                            true,
-	"soong-clang-prebuilts":                  true,
-	"soong-csuite":                           true,
-	"soong-fluoride":                         true,
-	"soong-fs_config":                        true,
-	"soong-icu":                              true,
-	"soong-java-config-error_prone":          true,
-	"soong-libchrome":                        true,
-	"soong-llvm":                             true,
-	"soong-robolectric":                      true,
-	"soong-rust-prebuilts":                   true,
-	"soong-selinux":                          true,
-	"soong-wayland-protocol-codegen":         true,
-	"treble_report_app":                      true,
-	"treble_report_local":                    true,
-	"treble_report_module":                   true,
-	"vintf-compatibility-matrix-soong-rules": true,
-	"xsdc-soong-rules":                       true,
-}
-
-const (
-	internalPluginsPath = "vendor/google/build/soong/internal_plugins.json"
-)
-
-type pluginProvider interface {
-	IsPluginFor(string) bool
-}
-
-func maybeAddInternalPluginsToAllowlist(ctx SingletonContext) {
-	if path := ExistentPathForSource(ctx, internalPluginsPath); path.Valid() {
-		ctx.AddNinjaFileDeps(path.String())
-		absPath := absolutePath(path.String())
-		var moreAllowed map[string]bool
-		data, err := ioutil.ReadFile(absPath)
-		if err != nil {
-			ctx.Errorf("Failed to open internal plugins path %q %q", internalPluginsPath, err)
-		}
-		if err := json.Unmarshal(data, &moreAllowed); err != nil {
-			fmt.Fprintf(os.Stderr, "Internal plugins file %q did not parse correctly: %q", data, err)
-		}
-		for k, v := range moreAllowed {
-			allowedPluginsByName[k] = v
-		}
-	}
-}
-
-func (p *pluginSingleton) GenerateBuildActions(ctx SingletonContext) {
-	for _, p := range ctx.DeviceConfig().BuildBrokenPluginValidation() {
-		allowedPluginsByName[p] = true
-	}
-	maybeAddInternalPluginsToAllowlist(ctx)
-
-	disallowedPlugins := map[string]bool{}
-	ctx.VisitAllModulesBlueprint(func(module blueprint.Module) {
-		if ctx.ModuleType(module) != "bootstrap_go_package" {
-			return
-		}
-
-		p, ok := module.(pluginProvider)
-		if !ok || !p.IsPluginFor("soong_build") {
-			return
-		}
-
-		name := ctx.ModuleName(module)
-		if _, ok := allowedPluginsByName[name]; ok {
-			return
-		}
-
-		dir := ctx.ModuleDir(module)
-
-		// allow use of plugins within Soong to not allowlist everything
-		if strings.HasPrefix(dir, "build/soong") {
-			return
-		}
-
-		// allow third party users outside of external to create new plugins, i.e. non-google paths
-		// under vendor or hardware
-		if !strings.HasPrefix(dir, "external/") && IsThirdPartyPath(dir) {
-			return
-		}
-		disallowedPlugins[name] = true
-	})
-	if len(disallowedPlugins) > 0 {
-		ctx.Errorf("New plugins are not supported; however %q were found. Please reach out to the build team or use BUILD_BROKEN_PLUGIN_VALIDATION (see Changes.md for more info).", SortedStringKeys(disallowedPlugins))
-	}
-}
diff --git a/android/variable.go b/android/variable.go
index b5d9666..249d53b 100644
--- a/android/variable.go
+++ b/android/variable.go
@@ -437,7 +437,6 @@
 
 	ShippingApiLevel *string `json:",omitempty"`
 
-	BuildBrokenPluginValidation        []string `json:",omitempty"`
 	BuildBrokenClangAsFlags            bool     `json:",omitempty"`
 	BuildBrokenClangCFlags             bool     `json:",omitempty"`
 	BuildBrokenClangProperty           bool     `json:",omitempty"`
diff --git a/tests/bootstrap_test.sh b/tests/bootstrap_test.sh
index c5a6336..fda5ca0 100755
--- a/tests/bootstrap_test.sh
+++ b/tests/bootstrap_test.sh
@@ -207,8 +207,8 @@
 function test_soong_build_rerun_iff_environment_changes() {
   setup
 
-  mkdir -p build/soong/cherry
-  cat > build/soong/cherry/Android.bp <<'EOF'
+  mkdir -p cherry
+  cat > cherry/Android.bp <<'EOF'
 bootstrap_go_package {
   name: "cherry",
   pkgPath: "android/soong/cherry",
@@ -224,7 +224,7 @@
 }
 EOF
 
-  cat > build/soong/cherry/cherry.go <<'EOF'
+  cat > cherry/cherry.go <<'EOF'
 package cherry
 
 import (
@@ -317,8 +317,8 @@
   run_soong
   local -r mtime1=$(stat -c "%y" out/soong/build.ninja)
 
-  mkdir -p vendor/foo/picard
-  cat > vendor/foo/picard/Android.bp <<'EOF'
+  mkdir -p a
+  cat > a/Android.bp <<'EOF'
 bootstrap_go_package {
   name: "picard-soong-rules",
   pkgPath: "android/soong/picard",
@@ -334,7 +334,7 @@
 }
 EOF
 
-  cat > vendor/foo/picard/picard.go <<'EOF'
+  cat > a/picard.go <<'EOF'
 package picard
 
 import (
@@ -390,11 +390,11 @@
 function test_glob_during_bootstrapping() {
   setup
 
-  mkdir -p build/soong/picard
-  cat > build/soong/picard/Android.bp <<'EOF'
+  mkdir -p a
+  cat > a/Android.bp <<'EOF'
 build=["foo*.bp"]
 EOF
-  cat > build/soong/picard/fooa.bp <<'EOF'
+  cat > a/fooa.bp <<'EOF'
 bootstrap_go_package {
   name: "picard-soong-rules",
   pkgPath: "android/soong/picard",
@@ -410,7 +410,7 @@
 }
 EOF
 
-  cat > build/soong/picard/picard.go <<'EOF'
+  cat > a/picard.go <<'EOF'
 package picard
 
 import (
@@ -459,7 +459,7 @@
 
   grep -q "Make it so" out/soong/build.ninja || fail "Original action not present"
 
-  cat > build/soong/picard/foob.bp <<'EOF'
+  cat > a/foob.bp <<'EOF'
 bootstrap_go_package {
   name: "worf-soong-rules",
   pkgPath: "android/soong/worf",
@@ -476,7 +476,7 @@
 }
 EOF
 
-  cat > build/soong/picard/worf.go <<'EOF'
+  cat > a/worf.go <<'EOF'
 package worf
 
 import "android/soong/picard"