Separate modules for API docs and API stubs

frameworks/base/Android.bp became too big. Modularize it into multiple
files for better readability and extensibility.

droidstubs and java_library modules for API stub libraries are moved to
StubLibraries.bp.

droidstubs and droiddoc modules for API documents are moved to
ApiDocs.bp

Also, added some documentation to explain the roles of the many modules
and how they are related with each other.

Bug: N/A
Test: m
Change-Id: I285e8c82078d5bd3ed85b0343db2f6375ce7ffb7
diff --git a/Android.bp b/Android.bp
index eef9f80..ffce9f0 100644
--- a/Android.bp
+++ b/Android.bp
@@ -1005,645 +1005,6 @@
     ],
 }
 
-// Make the api/current.txt file available for use by modules in other
-// directories.
-filegroup {
-    name: "frameworks-base-api-current.txt",
-    srcs: [
-        "api/current.txt",
-    ],
-}
-
-// Make the api/system-current.txt file available for use by modules in other
-// directories.
-filegroup {
-    name: "frameworks-base-api-system-current.txt",
-    srcs: [
-        "api/system-current.txt",
-    ],
-}
-
-// Make the api/system-removed.txt file available for use by modules in other
-// directories.
-filegroup {
-    name: "frameworks-base-api-system-removed.txt",
-    srcs: [
-        "api/system-removed.txt",
-    ],
-}
-
-framework_docs_only_args = " -android -manifest $(location core/res/AndroidManifest.xml) " +
-    "-werror -lerror -hide 111 -hide 113 -hide 125 -hide 126 -hide 127 -hide 128 " +
-    "-overview $(location core/java/overview.html) " +
-    // Federate Support Library references against local API file.
-    "-federate SupportLib https://developer.android.com " +
-    "-federationapi SupportLib $(location :current-support-api) " +
-    // Federate Support Library references against local API file.
-    "-federate AndroidX https://developer.android.com " +
-    "-federationapi AndroidX $(location :current-androidx-api) "
-
-framework_docs_only_libs = [
-    "voip-common",
-    "android.test.mock",
-    "android-support-annotations",
-    "android-support-compat",
-    "android-support-core-ui",
-    "android-support-core-utils",
-    "android-support-design",
-    "android-support-dynamic-animation",
-    "android-support-exifinterface",
-    "android-support-fragment",
-    "android-support-media-compat",
-    "android-support-percent",
-    "android-support-transition",
-    "android-support-v7-cardview",
-    "android-support-v7-gridlayout",
-    "android-support-v7-mediarouter",
-    "android-support-v7-palette",
-    "android-support-v7-preference",
-    "android-support-v13",
-    "android-support-v14-preference",
-    "android-support-v17-leanback",
-    "android-support-vectordrawable",
-    "android-support-animatedvectordrawable",
-    "android-support-v7-appcompat",
-    "android-support-v7-recyclerview",
-    "android-support-v8-renderscript",
-    "android-support-multidex",
-    "android-support-multidex-instrumentation",
-]
-
-metalava_framework_docs_args = "--manifest $(location core/res/AndroidManifest.xml) " +
-    "--ignore-classes-on-classpath " +
-    "--hide-package com.android.server " +
-    "--error UnhiddenSystemApi " +
-    "--hide RequiresPermission " +
-    "--hide CallbackInterface " +
-    "--hide MissingPermission --hide BroadcastBehavior " +
-    "--hide HiddenSuperclass --hide DeprecationMismatch --hide UnavailableSymbol " +
-    "--hide SdkConstant --hide HiddenTypeParameter --hide Todo --hide Typo " +
-    "--force-convert-to-warning-nullability-annotations +*:-android.*:+android.icu.*:-dalvik.*"
-
-packages_to_document = [
-    "android",
-    "dalvik",
-    "java",
-    "javax",
-    "junit",
-    "org.apache.http",
-    "org.json",
-    "org.w3c.dom",
-    "org.xml.sax",
-    "org.xmlpull",
-]
-
-stubs_defaults {
-    name: "framework-doc-stubs-default",
-    srcs: [
-        ":framework-mime-sources",
-        ":framework-non-updatable-sources",
-        ":framework-updatable-sources",
-        "core/java/**/*.logtags",
-        "test-base/src/**/*.java",
-        ":opt-telephony-srcs",
-        ":opt-net-voip-srcs",
-        ":core-current-stubs-source",
-        ":core_public_api_files",
-        "test-mock/src/**/*.java",
-        "test-runner/src/**/*.java",
-    ],
-    libs: framework_docs_only_libs,
-    create_doc_stubs: true,
-    annotations_enabled: true,
-    api_levels_annotations_enabled: true,
-    api_levels_annotations_dirs: [
-        "sdk-dir",
-        "api-versions-jars-dir",
-    ],
-    previous_api: ":last-released-public-api",
-    merge_annotations_dirs: [
-        "metalava-manual",
-    ],
-}
-
-doc_defaults {
-    name: "framework-docs-default",
-    libs: framework_docs_only_libs +
-        ["stub-annotations"],
-    html_dirs: [
-        "docs/html",
-    ],
-    knowntags: [
-        "docs/knowntags.txt",
-        ":known-oj-tags",
-    ],
-    custom_template: "droiddoc-templates-sdk",
-    resourcesdir: "docs/html/reference/images/",
-    resourcesoutdir: "reference/android/images/",
-    hdf: [
-        "dac true",
-        "sdk.codename O",
-        "sdk.preview.version 1",
-        "sdk.version 7.0",
-        "sdk.rel.id 1",
-        "sdk.preview 0",
-    ],
-    arg_files: [
-        "core/res/AndroidManifest.xml",
-        "core/java/overview.html",
-        ":current-support-api",
-        ":current-androidx-api",
-    ],
-    create_stubs: false,
-}
-
-doc_defaults {
-    name: "framework-dokka-docs-default",
-    create_stubs: false,
-}
-
-stubs_defaults {
-    name: "metalava-api-stubs-default",
-    srcs: [
-        ":framework-non-updatable-sources",
-        ":framework-updatable-sources",
-        "core/java/**/*.logtags",
-        ":opt-telephony-srcs",
-        ":opt-net-voip-srcs",
-        ":core-current-stubs-source",
-        ":core_public_api_files",
-        ":ike-api-srcs",
-    ],
-    libs: ["framework-internal-utils"],
-    installable: false,
-    annotations_enabled: true,
-    previous_api: ":last-released-public-api",
-    merge_annotations_dirs: [
-        "metalava-manual",
-    ],
-    api_levels_annotations_enabled: true,
-    api_levels_annotations_dirs: [
-        "sdk-dir",
-        "api-versions-jars-dir",
-    ],
-    sdk_version: "core_platform",
-    filter_packages: packages_to_document,
-}
-
-droidstubs {
-    name: "framework-doc-stubs",
-    defaults: ["framework-doc-stubs-default"],
-    arg_files: [
-        "core/res/AndroidManifest.xml",
-    ],
-    args: metalava_framework_docs_args,
-    write_sdk_values: true,
-}
-
-droidstubs {
-    name: "framework-doc-system-stubs",
-    defaults: ["framework-doc-stubs-default"],
-    arg_files: [
-        "core/res/AndroidManifest.xml",
-    ],
-    args: metalava_framework_docs_args + " --show-annotation android.annotation.SystemApi\\(client=android.annotation.SystemApi.Client.PRIVILEGED_APPS,process=android.annotation.SystemApi.Process.ALL\\) ",
-    write_sdk_values: true,
-}
-
-droiddoc {
-    name: "doc-comment-check-docs",
-    defaults: ["framework-docs-default"],
-    srcs: [
-        ":framework-doc-stubs",
-    ],
-    args: framework_docs_only_args + " -referenceonly -parsecomments",
-    installable: false,
-}
-
-droiddoc {
-    name: "offline-sdk-docs",
-    defaults: ["framework-docs-default"],
-    srcs: [
-        ":framework-doc-stubs",
-    ],
-    hdf: [
-        "android.whichdoc offline",
-    ],
-    proofread_file: "offline-sdk-docs-proofrerad.txt",
-    args: framework_docs_only_args + " -offlinemode -title \"Android SDK\"",
-    static_doc_index_redirect: "docs/docs-preview-index.html",
-}
-
-droiddoc {
-    // Please sync with android-api-council@ before making any changes for the name property below.
-    // Since there's cron jobs that fetch offline-sdk-referenceonly-docs-docs.zip periodically.
-    // See b/116221385 for reference.
-    name: "offline-sdk-referenceonly-docs",
-    defaults: ["framework-docs-default"],
-    srcs: [
-        ":framework-doc-stubs",
-    ],
-    hdf: [
-        "android.whichdoc offline",
-    ],
-    proofread_file: "offline-sdk-referenceonly-docs-proofrerad.txt",
-    args: framework_docs_only_args + " -offlinemode -title \"Android SDK\" -referenceonly",
-    static_doc_index_redirect: "docs/docs-documentation-redirect.html",
-    static_doc_properties: "docs/source.properties",
-}
-
-droiddoc {
-    // Please sync with android-api-council@ before making any changes for the name property below.
-    // Since there's cron jobs that fetch offline-system-sdk-referenceonly-docs-docs.zip periodically.
-    // See b/116221385 for reference.
-    name: "offline-system-sdk-referenceonly-docs",
-    defaults: ["framework-docs-default"],
-    srcs: [
-        ":framework-doc-system-stubs",
-    ],
-    hdf: [
-        "android.whichdoc offline",
-    ],
-    proofread_file: "offline-system-sdk-referenceonly-docs-proofrerad.txt",
-    args: framework_docs_only_args + " -hide 101 -hide 104 -hide 108" +
-    " -offlinemode -title \"Android System SDK\" -referenceonly",
-    static_doc_index_redirect: "docs/docs-documentation-redirect.html",
-    static_doc_properties: "docs/source.properties",
-}
-
-droiddoc {
-    name: "online-sdk-docs",
-    defaults: ["framework-docs-default"],
-    srcs: [
-        ":framework-doc-stubs",
-    ],
-    hdf: [
-        "android.whichdoc online",
-        "android.hasSamples true",
-    ],
-    proofread_file: "online-sdk-docs-proofrerad.txt",
-    args: framework_docs_only_args +
-        " -toroot / -samplegroup Admin " +
-        " -samplegroup Background " +
-        " -samplegroup Connectivity " +
-        " -samplegroup Content " +
-        " -samplegroup Input " +
-        " -samplegroup Media " +
-        " -samplegroup Notification " +
-        " -samplegroup RenderScript " +
-        " -samplegroup Security " +
-        " -samplegroup Sensors " +
-        " -samplegroup System " +
-        " -samplegroup Testing " +
-        " -samplegroup UI " +
-        " -samplegroup Views " +
-        " -samplegroup Wearable -samplesdir development/samples/browseable ",
-}
-
-droiddoc {
-    name: "online-system-api-sdk-docs",
-    defaults: ["framework-docs-default"],
-    srcs: [
-        ":framework-doc-system-stubs",
-    ],
-    hdf: [
-        "android.whichdoc online",
-        "android.hasSamples true",
-    ],
-    proofread_file: "online-system-api-sdk-docs-proofrerad.txt",
-    args: framework_docs_only_args +
-        " -referenceonly " +
-        " -title \"Android SDK - Including system APIs.\" " +
-        " -hide 101 " +
-        " -hide 104 " +
-        " -hide 108 " +
-        " -toroot / -samplegroup Admin " +
-        " -samplegroup Background " +
-        " -samplegroup Connectivity " +
-        " -samplegroup Content " +
-        " -samplegroup Input " +
-        " -samplegroup Media " +
-        " -samplegroup Notification " +
-        " -samplegroup RenderScript " +
-        " -samplegroup Security " +
-        " -samplegroup Sensors " +
-        " -samplegroup System " +
-        " -samplegroup Testing " +
-        " -samplegroup UI " +
-        " -samplegroup Views " +
-        " -samplegroup Wearable -samplesdir development/samples/browseable ",
-    installable: false,
-}
-
-droiddoc {
-    name: "ds-docs-java",
-    defaults: ["framework-docs-default"],
-    srcs: [
-        ":framework-doc-stubs",
-    ],
-    hdf: [
-        "android.whichdoc online",
-        "android.hasSamples true",
-    ],
-    proofread_file: "ds-docs-proofrerad.txt",
-    args: framework_docs_only_args +
-        " -toroot / -yamlV2 -metalavaApiSince -samplegroup Admin " +
-        " -samplegroup Background " +
-        " -samplegroup Connectivity " +
-        " -samplegroup Content " +
-        " -samplegroup Input " +
-        " -samplegroup Media " +
-        " -samplegroup Notification " +
-        " -samplegroup RenderScript " +
-        " -samplegroup Security " +
-        " -samplegroup Sensors " +
-        " -samplegroup System " +
-        " -samplegroup Testing " +
-        " -samplegroup UI " +
-        " -samplegroup Views " +
-        " -samplegroup Wearable -devsite -samplesdir development/samples/browseable ",
-}
-
-droiddoc {
-    name: "ds-docs-kt",
-    defaults: ["framework-dokka-docs-default"],
-    srcs: [
-        ":framework-doc-stubs",
-    ],
-    args: "-noJdkLink -links https://kotlinlang.org/api/latest/jvm/stdlib/^external/dokka/package-list " +
-    "-noStdlibLink",
-    proofread_file: "ds-dokka-proofread.txt",
-    dokka_enabled: true,
-}
-
-java_genrule {
-    name: "ds-docs",
-    tools: [
-        "zip2zip",
-        "merge_zips",
-    ],
-    srcs: [
-        ":ds-docs-java{.docs.zip}",
-        ":ds-docs-kt{.docs.zip}",
-    ],
-    out: ["ds-docs.zip"],
-    dist: {
-        targets: ["docs"],
-    },
-    cmd: "$(location zip2zip) -i $(location :ds-docs-kt{.docs.zip}) -o $(genDir)/ds-docs-kt-moved.zip **/*:en/reference/kotlin && " +
-         "$(location merge_zips) $(out) $(location :ds-docs-java{.docs.zip}) $(genDir)/ds-docs-kt-moved.zip",
-}
-
-java_genrule {
-    name: "ds-docs-switched",
-    tools: [
-        "switcher4",
-        "soong_zip",
-    ],
-    srcs: [
-        ":ds-docs-java{.docs.zip}",
-        ":ds-docs-kt{.docs.zip}",
-    ],
-    out: ["ds-docs-switched.zip"],
-    dist: {
-        targets: ["docs"],
-    },
-    cmd: "unzip $(location :ds-docs-java{.docs.zip}) -d $(genDir) && " +
-         "unzip $(location :ds-docs-kt{.docs.zip}) -d $(genDir)/en/reference/kotlin && " +
-         "SWITCHER=$$(cd $$(dirname $(location switcher4)) && pwd)/$$(basename $(location switcher4)) && " +
-         "(cd $(genDir)/en/reference && $$SWITCHER --work platform) && " +
-         "$(location soong_zip) -o $(out) -C $(genDir) -D $(genDir)",
-}
-
-
-droiddoc {
-    name: "ds-static-docs",
-    defaults: ["framework-docs-default"],
-    srcs: [
-        ":framework-doc-stubs",
-    ],
-    hdf: [
-        "android.whichdoc online",
-    ],
-    proofread_file: "ds-static-docs-proofrerad.txt",
-    args: framework_docs_only_args +
-        " -staticonly " +
-        " -toroot / " +
-        " -devsite " +
-        " -ignoreJdLinks ",
-}
-
-droiddoc {
-    name: "ds-ref-navtree-docs",
-    defaults: ["framework-docs-default"],
-    srcs: [
-        ":framework-doc-stubs",
-    ],
-    hdf: [
-        "android.whichdoc online",
-    ],
-    proofread_file: "ds-ref-navtree-docs-proofrerad.txt",
-    args: framework_docs_only_args +
-        " -toroot / " +
-        " -atLinksNavtree " +
-        " -navtreeonly ",
-}
-
-droiddoc {
-    name: "online-sdk-dev-docs",
-    defaults: ["framework-docs-default"],
-    srcs: [
-        ":framework-doc-stubs",
-    ],
-    hdf: [
-        "android.whichdoc online",
-        "android.hasSamples true",
-    ],
-    proofread_file: "online-sdk-dev-docs-proofrerad.txt",
-    args: framework_docs_only_args +
-        " -toroot / -samplegroup Admin " +
-        " -samplegroup Background " +
-        " -samplegroup Connectivity " +
-        " -samplegroup Content " +
-        " -samplegroup Input " +
-        " -samplegroup Media " +
-        " -samplegroup Notification " +
-        " -samplegroup RenderScript " +
-        " -samplegroup Security " +
-        " -samplegroup Sensors " +
-        " -samplegroup System " +
-        " -samplegroup Testing " +
-        " -samplegroup UI " +
-        " -samplegroup Views " +
-        " -samplegroup Wearable -samplesdir development/samples/browseable ",
-}
-
-droiddoc {
-    name: "hidden-docs",
-    defaults: ["framework-docs-default"],
-    srcs: [
-        ":framework-doc-stubs",
-    ],
-    proofread_file: "hidden-docs-proofrerad.txt",
-    args: framework_docs_only_args +
-        " -referenceonly " +
-        " -title \"Android SDK - Including hidden APIs.\"",
-}
-
-droidstubs {
-    name: "hwbinder-stubs-docs",
-    srcs: [
-        "core/java/android/os/HidlSupport.java",
-        "core/java/android/annotation/IntDef.java",
-        "core/java/android/annotation/IntRange.java",
-        "core/java/android/annotation/NonNull.java",
-        "core/java/android/annotation/SystemApi.java",
-        "core/java/android/os/HidlMemory.java",
-        "core/java/android/os/HwBinder.java",
-        "core/java/android/os/HwBlob.java",
-        "core/java/android/os/HwParcel.java",
-        "core/java/android/os/IHwBinder.java",
-        "core/java/android/os/IHwInterface.java",
-        "core/java/android/os/DeadObjectException.java",
-        "core/java/android/os/DeadSystemException.java",
-        "core/java/android/os/NativeHandle.java",
-        "core/java/android/os/RemoteException.java",
-        "core/java/android/util/AndroidException.java",
-    ],
-    installable: false,
-    sdk_version: "core_platform",
-    annotations_enabled: true,
-    previous_api: ":last-released-public-api",
-    merge_annotations_dirs: [
-        "metalava-manual",
-    ],
-    args: " --show-annotation android.annotation.SystemApi\\(client=android.annotation.SystemApi.Client.PRIVILEGED_APPS,process=android.annotation.SystemApi.Process.ALL\\)",
-}
-
-java_library_static {
-    name: "hwbinder.stubs",
-    sdk_version: "core_current",
-    srcs: [
-        ":hwbinder-stubs-docs",
-    ],
-}
-
-droidstubs {
-    name: "hiddenapi-lists-docs",
-    defaults: ["metalava-api-stubs-default"],
-    arg_files: [
-        "core/res/AndroidManifest.xml",
-    ],
-    dex_api_filename: "public-dex.txt",
-    private_dex_api_filename: "private-dex.txt",
-    removed_dex_api_filename: "removed-dex.txt",
-    args: metalava_framework_docs_args +
-        " --show-unannotated " +
-        " --show-annotation android.annotation.SystemApi\\(client=android.annotation.SystemApi.Client.PRIVILEGED_APPS,process=android.annotation.SystemApi.Process.ALL\\) " +
-        " --show-annotation android.annotation.TestApi ",
-}
-
-droidstubs {
-    name: "hiddenapi-mappings",
-    defaults: ["metalava-api-stubs-default"],
-    srcs: [
-        ":opt-telephony-common-srcs",
-    ],
-
-    arg_files: [
-        "core/res/AndroidManifest.xml",
-    ],
-    dex_mapping_filename: "dex-mapping.txt",
-    args: metalava_framework_docs_args +
-        " --hide ReferencesHidden " +
-        " --hide UnhiddenSystemApi " +
-        " --show-unannotated " +
-        " --show-annotation android.annotation.SystemApi\\(client=android.annotation.SystemApi.Client.PRIVILEGED_APPS,process=android.annotation.SystemApi.Process.ALL\\) " +
-        " --show-annotation android.annotation.TestApi ",
-}
-
-droidstubs {
-    name: "api-stubs-docs",
-    defaults: ["metalava-api-stubs-default"],
-    api_filename: "public_api.txt",
-    private_api_filename: "private.txt",
-    removed_api_filename: "removed.txt",
-    arg_files: [
-        "core/res/AndroidManifest.xml",
-    ],
-    args: metalava_framework_docs_args,
-    check_api: {
-        current: {
-            api_file: "api/current.txt",
-            removed_api_file: "api/removed.txt",
-        },
-        last_released: {
-            api_file: ":last-released-public-api",
-            removed_api_file: "api/removed.txt",
-            baseline_file: ":public-api-incompatibilities-with-last-released",
-        },
-        api_lint: {
-            enabled: true,
-            new_since: ":last-released-public-api",
-            baseline_file: "api/lint-baseline.txt",
-        },
-    },
-    jdiff_enabled: true,
-}
-
-droidstubs {
-    name: "system-api-stubs-docs",
-    defaults: ["metalava-api-stubs-default"],
-    api_tag_name: "SYSTEM",
-    api_filename: "system-api.txt",
-    private_api_filename: "system-private.txt",
-    private_dex_api_filename: "system-private-dex.txt",
-    removed_api_filename: "system-removed.txt",
-    arg_files: [
-        "core/res/AndroidManifest.xml",
-    ],
-    args: metalava_framework_docs_args + " --show-annotation android.annotation.SystemApi\\(client=android.annotation.SystemApi.Client.PRIVILEGED_APPS,process=android.annotation.SystemApi.Process.ALL\\)",
-    check_api: {
-        current: {
-            api_file: "api/system-current.txt",
-            removed_api_file: "api/system-removed.txt",
-        },
-        last_released: {
-            api_file: ":last-released-system-api",
-            removed_api_file: "api/system-removed.txt",
-            baseline_file: ":system-api-incompatibilities-with-last-released"
-        },
-        api_lint: {
-            enabled: true,
-            new_since: ":last-released-system-api",
-            baseline_file: "api/system-lint-baseline.txt",
-        },
-    },
-    jdiff_enabled: true,
-}
-
-droidstubs {
-    name: "test-api-stubs-docs",
-    defaults: ["metalava-api-stubs-default"],
-    api_tag_name: "TEST",
-    api_filename: "test-api.txt",
-    removed_api_filename: "test-removed.txt",
-    arg_files: [
-        "core/res/AndroidManifest.xml",
-    ],
-    args: metalava_framework_docs_args + " --show-annotation android.annotation.TestApi",
-    check_api: {
-        current: {
-            api_file: "api/test-current.txt",
-            removed_api_file: "api/test-removed.txt",
-        },
-        api_lint: {
-            enabled: true,
-            baseline_file: "api/test-lint-baseline.txt",
-        },
-    },
-}
-
 filegroup {
     name: "framework-annotation-nonnull-srcs",
     srcs: [
@@ -1759,3 +1120,20 @@
         "core/java/com/android/internal/util/XmlUtils.java",
     ],
 }
+
+// TODO(b/145644363): move this to under StubLibraries.bp or ApiDocs.bp
+metalava_framework_docs_args = "--manifest $(location core/res/AndroidManifest.xml) " +
+    "--ignore-classes-on-classpath " +
+    "--hide-package com.android.server " +
+    "--error UnhiddenSystemApi " +
+    "--hide RequiresPermission " +
+    "--hide CallbackInterface " +
+    "--hide MissingPermission --hide BroadcastBehavior " +
+    "--hide HiddenSuperclass --hide DeprecationMismatch --hide UnavailableSymbol " +
+    "--hide SdkConstant --hide HiddenTypeParameter --hide Todo --hide Typo " +
+    "--force-convert-to-warning-nullability-annotations +*:-android.*:+android.icu.*:-dalvik.*"
+
+build = [
+    "StubLibraries.bp",
+    "ApiDocs.bp",
+]