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-rw-r--r--api/Android.bp354
-rw-r--r--api/api.go151
2 files changed, 139 insertions, 366 deletions
diff --git a/api/Android.bp b/api/Android.bp
index f89c55705ada..d5d21052c3fe 100644
--- a/api/Android.bp
+++ b/api/Android.bp
@@ -32,6 +32,7 @@ bootstrap_go_package {
"soong",
"soong-android",
"soong-genrule",
+ "soong-java",
],
srcs: ["api.go"],
pluginFor: ["soong_build"],
@@ -102,43 +103,30 @@ genrule {
visibility: ["//visibility:public"],
}
-genrule {
- name: "frameworks-base-api-current.txt",
- srcs: [
- ":android.net.ipsec.ike{.public.api.txt}",
- ":art.module.public.api{.public.api.txt}",
- ":conscrypt.module.public.api{.public.api.txt}",
- ":framework-appsearch{.public.api.txt}",
- ":framework-connectivity{.public.api.txt}",
- ":framework-graphics{.public.api.txt}",
- ":framework-media{.public.api.txt}",
- ":framework-mediaprovider{.public.api.txt}",
- ":framework-permission{.public.api.txt}",
- ":framework-permission-s{.public.api.txt}",
- ":framework-scheduling{.public.api.txt}",
- ":framework-sdkextensions{.public.api.txt}",
- ":framework-statsd{.public.api.txt}",
- ":framework-tethering{.public.api.txt}",
- ":framework-wifi{.public.api.txt}",
- ":i18n.module.public.api{.public.api.txt}",
- ":non-updatable-current.txt",
- ],
- out: ["current.txt"],
- tools: ["metalava"],
- cmd: metalava_cmd + "$(in) --api $(out)",
- dists: [
- {
- targets: ["droidcore"],
- dir: "api",
- dest: "current.txt",
- },
- {
- targets: ["sdk"],
- dir: "apistubs/android/public/api",
- dest: "android.txt",
- },
+combined_apis {
+ name: "frameworks-base-api",
+ bootclasspath: [
+ "android.net.ipsec.ike",
+ "art.module.public.api",
+ "conscrypt.module.public.api",
+ "framework-appsearch",
+ "framework-connectivity",
+ "framework-graphics",
+ "framework-media",
+ "framework-mediaprovider",
+ "framework-permission",
+ "framework-permission-s",
+ "framework-scheduling",
+ "framework-sdkextensions",
+ "framework-statsd",
+ "framework-tethering",
+ "framework-wifi",
+ "i18n.module.public.api",
+ ],
+ system_server_classpath: [
+ "service-media-s",
+ "service-permission",
],
- visibility: ["//visibility:public"],
}
genrule {
@@ -158,108 +146,6 @@ genrule {
}
genrule {
- name: "frameworks-base-api-current.srcjar",
- srcs: [
- ":android.net.ipsec.ike{.public.stubs.source}",
- ":api-stubs-docs-non-updatable",
- ":art.module.public.api{.public.stubs.source}",
- ":conscrypt.module.public.api{.public.stubs.source}",
- ":framework-appsearch{.public.stubs.source}",
- ":framework-connectivity{.public.stubs.source}",
- ":framework-graphics{.public.stubs.source}",
- ":framework-media{.public.stubs.source}",
- ":framework-mediaprovider{.public.stubs.source}",
- ":framework-permission{.public.stubs.source}",
- ":framework-permission-s{.public.stubs.source}",
- ":framework-scheduling{.public.stubs.source}",
- ":framework-sdkextensions{.public.stubs.source}",
- ":framework-statsd{.public.stubs.source}",
- ":framework-tethering{.public.stubs.source}",
- ":framework-wifi{.public.stubs.source}",
- ":i18n.module.public.api{.public.stubs.source}",
- ],
- out: ["current.srcjar"],
- tools: ["merge_zips"],
- cmd: "$(location merge_zips) $(out) $(in)",
- visibility: ["//visibility:private"], // Used by make module in //development, mind.
-}
-
-genrule {
- name: "frameworks-base-api-removed.txt",
- srcs: [
- ":android.net.ipsec.ike{.public.removed-api.txt}",
- ":art.module.public.api{.public.removed-api.txt}",
- ":conscrypt.module.public.api{.public.removed-api.txt}",
- ":framework-appsearch{.public.removed-api.txt}",
- ":framework-connectivity{.public.removed-api.txt}",
- ":framework-graphics{.public.removed-api.txt}",
- ":framework-media{.public.removed-api.txt}",
- ":framework-mediaprovider{.public.removed-api.txt}",
- ":framework-permission{.public.removed-api.txt}",
- ":framework-permission-s{.public.removed-api.txt}",
- ":framework-scheduling{.public.removed-api.txt}",
- ":framework-sdkextensions{.public.removed-api.txt}",
- ":framework-statsd{.public.removed-api.txt}",
- ":framework-tethering{.public.removed-api.txt}",
- ":framework-wifi{.public.removed-api.txt}",
- ":i18n.module.public.api{.public.removed-api.txt}",
- ":non-updatable-removed.txt",
- ],
- out: ["removed.txt"],
- tools: ["metalava"],
- cmd: metalava_cmd + "$(in) --api $(out)",
- dists: [
- {
- targets: ["droidcore"],
- dir: "api",
- dest: "removed.txt",
- },
- {
- targets: ["sdk"],
- dir: "apistubs/android/public/api",
- dest: "removed.txt",
- },
- ],
-}
-
-genrule {
- name: "frameworks-base-api-system-current.txt",
- srcs: [
- ":art.module.public.api{.system.api.txt}",
- ":android.net.ipsec.ike{.system.api.txt}",
- ":framework-appsearch{.system.api.txt}",
- ":framework-connectivity{.system.api.txt}",
- ":framework-graphics{.system.api.txt}",
- ":framework-media{.system.api.txt}",
- ":framework-mediaprovider{.system.api.txt}",
- ":framework-permission{.system.api.txt}",
- ":framework-permission-s{.system.api.txt}",
- ":framework-scheduling{.system.api.txt}",
- ":framework-sdkextensions{.system.api.txt}",
- ":framework-statsd{.system.api.txt}",
- ":framework-tethering{.system.api.txt}",
- ":framework-wifi{.system.api.txt}",
- ":non-updatable-system-current.txt",
- ],
- out: ["system-current.txt"],
- tools: ["metalava"],
- cmd: metalava_cmd + "$(in) --api $(out)",
- dists: [
- {
- targets: ["droidcore"],
- dir: "api",
- dest: "system-current.txt",
- },
- {
- targets: ["sdk"],
- dir: "apistubs/android/system/api",
- dest: "android.txt",
- },
- ],
- visibility: ["//visibility:public"],
-}
-
-genrule {
name: "frameworks-base-api-system-current-compat",
srcs: [
":android.api.system.latest",
@@ -278,79 +164,6 @@ genrule {
}
genrule {
- name: "frameworks-base-api-system-removed.txt",
- srcs: [
- ":art.module.public.api{.system.removed-api.txt}",
- ":android.net.ipsec.ike{.system.removed-api.txt}",
- ":framework-appsearch{.system.removed-api.txt}",
- ":framework-connectivity{.system.removed-api.txt}",
- ":framework-graphics{.system.removed-api.txt}",
- ":framework-media{.system.removed-api.txt}",
- ":framework-mediaprovider{.system.removed-api.txt}",
- ":framework-permission{.system.removed-api.txt}",
- ":framework-permission-s{.system.removed-api.txt}",
- ":framework-scheduling{.system.removed-api.txt}",
- ":framework-sdkextensions{.system.removed-api.txt}",
- ":framework-statsd{.system.removed-api.txt}",
- ":framework-tethering{.system.removed-api.txt}",
- ":framework-wifi{.system.removed-api.txt}",
- ":non-updatable-system-removed.txt",
- ],
- out: ["system-removed.txt"],
- tools: ["metalava"],
- cmd: metalava_cmd + "$(in) --api $(out)",
- dists: [
- {
- targets: ["droidcore"],
- dir: "api",
- dest: "system-removed.txt",
- },
- {
- targets: ["sdk"],
- dir: "apistubs/android/system/api",
- dest: "removed.txt",
- },
- ],
- visibility: ["//visibility:public"],
-}
-
-genrule {
- name: "frameworks-base-api-module-lib-current.txt",
- srcs: [
- ":art.module.public.api{.module-lib.api.txt}",
- ":android.net.ipsec.ike{.module-lib.api.txt}",
- ":framework-appsearch{.module-lib.api.txt}",
- ":framework-connectivity{.module-lib.api.txt}",
- ":framework-graphics{.module-lib.api.txt}",
- ":framework-media{.module-lib.api.txt}",
- ":framework-mediaprovider{.module-lib.api.txt}",
- ":framework-permission{.module-lib.api.txt}",
- ":framework-permission-s{.module-lib.api.txt}",
- ":framework-scheduling{.module-lib.api.txt}",
- ":framework-sdkextensions{.module-lib.api.txt}",
- ":framework-statsd{.module-lib.api.txt}",
- ":framework-tethering{.module-lib.api.txt}",
- ":framework-wifi{.module-lib.api.txt}",
- ":non-updatable-module-lib-current.txt",
- ],
- out: ["module-lib-current.txt"],
- tools: ["metalava"],
- cmd: metalava_cmd + "$(in) --api $(out)",
- dists: [
- {
- targets: ["droidcore"],
- dir: "api",
- dest: "module-lib-current.txt",
- },
- {
- targets: ["sdk"],
- dir: "apistubs/android/module-lib/api",
- dest: "android.txt",
- },
- ],
-}
-
-genrule {
name: "frameworks-base-api-module-lib-current-compat",
srcs: [
":android.api.module-lib.latest",
@@ -372,42 +185,6 @@ genrule {
}
genrule {
- name: "frameworks-base-api-module-lib-removed.txt",
- srcs: [
- ":art.module.public.api{.module-lib.removed-api.txt}",
- ":android.net.ipsec.ike{.module-lib.removed-api.txt}",
- ":framework-appsearch{.module-lib.removed-api.txt}",
- ":framework-connectivity{.module-lib.removed-api.txt}",
- ":framework-graphics{.module-lib.removed-api.txt}",
- ":framework-media{.module-lib.removed-api.txt}",
- ":framework-mediaprovider{.module-lib.removed-api.txt}",
- ":framework-permission{.module-lib.removed-api.txt}",
- ":framework-permission-s{.module-lib.removed-api.txt}",
- ":framework-scheduling{.module-lib.removed-api.txt}",
- ":framework-sdkextensions{.module-lib.removed-api.txt}",
- ":framework-statsd{.module-lib.removed-api.txt}",
- ":framework-tethering{.module-lib.removed-api.txt}",
- ":framework-wifi{.module-lib.removed-api.txt}",
- ":non-updatable-module-lib-removed.txt",
- ],
- out: ["module-lib-removed.txt"],
- tools: ["metalava"],
- cmd: metalava_cmd + "$(in) --api $(out)",
- dists: [
- {
- targets: ["droidcore"],
- dir: "api",
- dest: "module-lib-removed.txt",
- },
- {
- targets: ["sdk"],
- dir: "apistubs/android/module-lib/api",
- dest: "removed.txt",
- },
- ],
-}
-
-genrule {
name: "combined-removed-dex",
visibility: [
"//frameworks/base/boot",
@@ -423,86 +200,3 @@ genrule {
out: ["combined-removed-dex.txt"],
cmd: "$(location gen_combined_removed_dex.sh) $(location metalava) $(genDir) $(in) > $(out)",
}
-
-genrule {
- name: "frameworks-base-api-system-server-current.txt",
- srcs: [
- ":service-media-s{.system-server.api.txt}",
- ":service-permission{.system-server.api.txt}",
- ":non-updatable-system-server-current.txt",
- ],
- out: ["system-server-current.txt"],
- tools: ["metalava"],
- cmd: metalava_cmd + "$(in) --api $(out)",
- dists: [
- {
- targets: ["droidcore"],
- dir: "api",
- dest: "system-server-current.txt",
- },
- {
- targets: ["sdk"],
- dir: "apistubs/android/system-server/api",
- dest: "android.txt",
- },
- ],
-}
-
-genrule {
- name: "frameworks-base-api-system-server-removed.txt",
- srcs: [
- ":service-media-s{.system-server.removed-api.txt}",
- ":service-permission{.system-server.removed-api.txt}",
- ":non-updatable-system-server-removed.txt",
- ],
- out: ["system-server-removed.txt"],
- tools: ["metalava"],
- cmd: metalava_cmd + "$(in) --api $(out)",
- dists: [
- {
- targets: ["droidcore"],
- dir: "api",
- dest: "system-server-removed.txt",
- },
- {
- targets: ["sdk"],
- dir: "apistubs/android/system-server/api",
- dest: "removed.txt",
- },
- ],
-}
-
-// This rule will filter classes present in the jar files of mainline modules
-// from the lint database in api-versions.xml.
-// This is done to reduce the number of false positive NewApi findings in
-// java libraries that compile against the module SDK
-genrule {
- name: "api-versions-xml-public-filtered",
- srcs: [
- // Note: order matters: first parameter is the full api-versions.xml
- // after that the stubs files in any order
- // stubs files are all modules that export API surfaces EXCEPT ART
- ":framework-doc-stubs{.api_versions.xml}",
- ":android.net.ipsec.ike.stubs{.jar}",
- ":conscrypt.module.public.api.stubs{.jar}",
- ":framework-appsearch.stubs{.jar}",
- ":framework-connectivity.stubs{.jar}",
- ":framework-graphics.stubs{.jar}",
- ":framework-media.stubs{.jar}",
- ":framework-mediaprovider.stubs{.jar}",
- ":framework-permission.stubs{.jar}",
- ":framework-permission-s.stubs{.jar}",
- ":framework-scheduling.stubs{.jar}",
- ":framework-sdkextensions.stubs{.jar}",
- ":framework-statsd.stubs{.jar}",
- ":framework-tethering.stubs{.jar}",
- ":framework-wifi.stubs{.jar}",
- ":i18n.module.public.api.stubs{.jar}",
- ],
- out: ["api-versions-public-filtered.xml"],
- tools: ["api_versions_trimmer"],
- cmd: "$(location api_versions_trimmer) $(out) $(in)",
- dist: {
- targets: ["sdk"],
- },
-}
diff --git a/api/api.go b/api/api.go
index 74cbece7ebf5..4b6ebc1947e9 100644
--- a/api/api.go
+++ b/api/api.go
@@ -15,12 +15,19 @@
package api
import (
+ "sort"
+
"github.com/google/blueprint/proptools"
"android/soong/android"
"android/soong/genrule"
+ "android/soong/java"
)
+const art = "art.module.public.api"
+const conscrypt = "conscrypt.module.public.api"
+const i18n = "i18n.module.public.api"
+
// The intention behind this soong plugin is to generate a number of "merged"
// API-related modules that would otherwise require a large amount of very
// similar Android.bp boilerplate to define. For example, the merged current.txt
@@ -32,6 +39,8 @@ import (
type CombinedApisProperties struct {
// Module libraries in the bootclasspath
Bootclasspath []string
+ // Module libraries on the bootclasspath if include_nonpublic_framework_api is true.
+ Conditional_bootclasspath []string
// Module libraries in system server
System_server_classpath []string
}
@@ -65,6 +74,19 @@ type genruleProps struct {
Visibility []string
}
+type libraryProps struct {
+ Name *string
+ Sdk_version *string
+ Static_libs []string
+ Visibility []string
+}
+
+type fgProps struct {
+ Name *string
+ Srcs []string
+ Visibility []string
+}
+
// Struct to pass parameters for the various merged [current|removed].txt file modules we create.
type MergedTxtDefinition struct {
// "current.txt" or "removed.txt"
@@ -95,7 +117,7 @@ func createMergedTxt(ctx android.LoadHookContext, txt MergedTxtDefinition) {
props.Tools = []string{"metalava"}
props.Out = []string{filename}
props.Cmd = proptools.StringPtr(metalavaCmd + "$(in) --api $(out)")
- props.Srcs = createSrcs(txt.BaseTxt, txt.Modules, txt.ModuleTag)
+ props.Srcs = append([]string{txt.BaseTxt}, createSrcs(txt.Modules, txt.ModuleTag)...)
props.Dists = []android.Dist{
{
Targets: []string{"droidcore"},
@@ -118,12 +140,36 @@ func createMergedStubsSrcjar(ctx android.LoadHookContext, modules []string) {
props.Tools = []string{"merge_zips"}
props.Out = []string{"current.srcjar"}
props.Cmd = proptools.StringPtr("$(location merge_zips) $(out) $(in)")
- props.Srcs = createSrcs(":api-stubs-docs-non-updatable", modules, "{.public.stubs.source}")
+ props.Srcs = append([]string{":api-stubs-docs-non-updatable"}, createSrcs(modules, "{.public.stubs.source}")...)
props.Visibility = []string{"//visibility:private"} // Used by make module in //development, mind
ctx.CreateModule(genrule.GenRuleFactory, &props)
}
+// This produces the same annotations.zip as framework-doc-stubs, but by using
+// outputs from individual modules instead of all the source code.
+func createMergedAnnotations(ctx android.LoadHookContext, modules []string) {
+ // Conscrypt and i18n currently do not enable annotations
+ modules = removeAll(modules, []string{conscrypt, i18n})
+ props := genruleProps{}
+ props.Name = proptools.StringPtr("sdk-annotations.zip")
+ props.Tools = []string{"merge_annotation_zips", "soong_zip"}
+ props.Out = []string{"annotations.zip"}
+ props.Cmd = proptools.StringPtr("$(location merge_annotation_zips) $(genDir)/out $(in) && " +
+ "$(location soong_zip) -o $(out) -C $(genDir)/out -D $(genDir)/out")
+ props.Srcs = append([]string{":android-non-updatable-doc-stubs{.annotations.zip}"}, createSrcs(modules, "{.public.annotations.zip}")...)
+ ctx.CreateModule(genrule.GenRuleFactory, &props)
+}
+
func createFilteredApiVersions(ctx android.LoadHookContext, modules []string) {
+ // For the filtered api versions, we prune all APIs except art module's APIs. because
+ // 1) ART apis are available by default to all modules, while other module-to-module deps are
+ // explicit and probably receive more scrutiny anyway
+ // 2) The number of ART/libcore APIs is large, so not linting them would create a large gap
+ // 3) It's a compromise. Ideally we wouldn't be filtering out any module APIs, and have
+ // per-module lint databases that excludes just that module's APIs. Alas, that's more
+ // difficult to achieve.
+ modules = remove(modules, art)
+
props := genruleProps{}
props.Name = proptools.StringPtr("api-versions-xml-public-filtered")
props.Tools = []string{"api_versions_trimmer"}
@@ -132,43 +178,41 @@ func createFilteredApiVersions(ctx android.LoadHookContext, modules []string) {
// Note: order matters: first parameter is the full api-versions.xml
// after that the stubs files in any order
// stubs files are all modules that export API surfaces EXCEPT ART
- props.Srcs = createSrcs(":framework-doc-stubs{.api_versions.xml}", modules, ".stubs{.jar}")
+ props.Srcs = append([]string{":framework-doc-stubs{.api_versions.xml}"}, createSrcs(modules, ".stubs{.jar}")...)
props.Dists = []android.Dist{{Targets: []string{"sdk"}}}
ctx.CreateModule(genrule.GenRuleFactory, &props)
}
-func createSrcs(base string, modules []string, tag string) []string {
- a := make([]string, 0, len(modules)+1)
- a = append(a, base)
- for _, module := range modules {
- a = append(a, ":"+module+tag)
- }
- return a
+func createMergedModuleLibStubs(ctx android.LoadHookContext, modules []string) {
+ // The user of this module compiles against the "core" SDK, so remove core libraries to avoid dupes.
+ modules = removeAll(modules, []string{art, conscrypt, i18n})
+ props := libraryProps{}
+ props.Name = proptools.StringPtr("framework-updatable-stubs-module_libs_api")
+ props.Static_libs = transformArray(modules, "", ".stubs.module_lib")
+ props.Sdk_version = proptools.StringPtr("module_current")
+ props.Visibility = []string{"//frameworks/base"}
+ ctx.CreateModule(java.LibraryFactory, &props)
}
-func remove(s []string, v string) []string {
- s2 := make([]string, 0, len(s))
- for _, sv := range s {
- if sv != v {
- s2 = append(s2, sv)
- }
- }
- return s2
+func createPublicStubsSourceFilegroup(ctx android.LoadHookContext, modules []string) {
+ props := fgProps{}
+ props.Name = proptools.StringPtr("all-modules-public-stubs-source")
+ props.Srcs = createSrcs(modules, "{.public.stubs.source}")
+ props.Visibility = []string{"//frameworks/base"}
+ ctx.CreateModule(android.FileGroupFactory, &props)
}
-func createMergedTxts(ctx android.LoadHookContext, props CombinedApisProperties) {
+func createMergedTxts(ctx android.LoadHookContext, bootclasspath, system_server_classpath []string) {
var textFiles []MergedTxtDefinition
// Two module libraries currently do not support @SystemApi so only have the public scope.
- bcpWithSystemApi := props.Bootclasspath
- bcpWithSystemApi = remove(bcpWithSystemApi, "conscrypt.module.public.api")
- bcpWithSystemApi = remove(bcpWithSystemApi, "i18n.module.public.api")
+ bcpWithSystemApi := removeAll(bootclasspath, []string{conscrypt, i18n})
tagSuffix := []string{".api.txt}", ".removed-api.txt}"}
for i, f := range []string{"current.txt", "removed.txt"} {
textFiles = append(textFiles, MergedTxtDefinition{
TxtFilename: f,
BaseTxt: ":non-updatable-" + f,
- Modules: props.Bootclasspath,
+ Modules: bootclasspath,
ModuleTag: "{.public" + tagSuffix[i],
Scope: "public",
})
@@ -189,7 +233,7 @@ func createMergedTxts(ctx android.LoadHookContext, props CombinedApisProperties)
textFiles = append(textFiles, MergedTxtDefinition{
TxtFilename: f,
BaseTxt: ":non-updatable-system-server-" + f,
- Modules: props.System_server_classpath,
+ Modules: system_server_classpath,
ModuleTag: "{.system-server" + tagSuffix[i],
Scope: "system-server",
})
@@ -200,20 +244,22 @@ func createMergedTxts(ctx android.LoadHookContext, props CombinedApisProperties)
}
func (a *CombinedApis) createInternalModules(ctx android.LoadHookContext) {
- createMergedTxts(ctx, a.properties)
+ bootclasspath := a.properties.Bootclasspath
+ if ctx.Config().VendorConfig("ANDROID").Bool("include_nonpublic_framework_api") {
+ bootclasspath = append(bootclasspath, a.properties.Conditional_bootclasspath...)
+ sort.Strings(bootclasspath)
+ }
+ createMergedTxts(ctx, bootclasspath, a.properties.System_server_classpath)
- createMergedStubsSrcjar(ctx, a.properties.Bootclasspath)
+ createMergedStubsSrcjar(ctx, bootclasspath)
- // For the filtered api versions, we prune all APIs except art module's APIs. because
- // 1) ART apis are available by default to all modules, while other module-to-module deps are
- // explicit and probably receive more scrutiny anyway
- // 2) The number of ART/libcore APIs is large, so not linting them would create a large gap
- // 3) It's a compromise. Ideally we wouldn't be filtering out any module APIs, and have
- // per-module lint databases that excludes just that module's APIs. Alas, that's more
- // difficult to achieve.
- filteredModules := a.properties.Bootclasspath
- filteredModules = remove(filteredModules, "art.module.public.api")
- createFilteredApiVersions(ctx, filteredModules)
+ createMergedModuleLibStubs(ctx, bootclasspath)
+
+ createMergedAnnotations(ctx, bootclasspath)
+
+ createFilteredApiVersions(ctx, bootclasspath)
+
+ createPublicStubsSourceFilegroup(ctx, bootclasspath)
}
func combinedApisModuleFactory() android.Module {
@@ -223,3 +269,36 @@ func combinedApisModuleFactory() android.Module {
android.AddLoadHook(module, func(ctx android.LoadHookContext) { module.createInternalModules(ctx) })
return module
}
+
+// Various utility methods below.
+
+// Creates an array of ":<m><tag>" for each m in <modules>.
+func createSrcs(modules []string, tag string) []string {
+ return transformArray(modules, ":", tag)
+}
+
+// Creates an array of "<prefix><m><suffix>", for each m in <modules>.
+func transformArray(modules []string, prefix, suffix string) []string {
+ a := make([]string, 0, len(modules))
+ for _, module := range modules {
+ a = append(a, prefix+module+suffix)
+ }
+ return a
+}
+
+func removeAll(s []string, vs []string) []string {
+ for _, v := range vs {
+ s = remove(s, v)
+ }
+ return s
+}
+
+func remove(s []string, v string) []string {
+ s2 := make([]string, 0, len(s))
+ for _, sv := range s {
+ if sv != v {
+ s2 = append(s2, sv)
+ }
+ }
+ return s2
+}